CARRIER Package Units(both Units Combined) Manual L0901375

User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides

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WEATHERMAKER ®
48/50AJ,AK,AW, AY,A2,A3,A4,A5020-060
Single Package Large Rooftop Units
with COMFORTLINK Ti Version 5.x Controls

Controls, Start-Up, Operation,
Service and Troubleshooting
CONTENTS
Page
Page
SAFETY CONSiDERATiONS .........................
2
Unit Configuration Submenu .......................
35
Cooling Control ....................................
37
GENERAL .........................................
2,3
• SETTING UP THE SYSTEM
Conventions Used in this Manual ....................
3
• MACHINE DEPENDENT CONFIGURATIONS
BASIC CONTROL USAGE ..........................
3-6
• SET POINTS
ComfortLink Controls ...............................
3
• SUPPLY AIR RESET CONFIGURATION
Scrolling Marquee ...................................
4
• COOLING CONFIGURATION
Accessory Navigator TM Display ......................
4
• COMPRESSOR SAFETIES
Operation ............................................
4
• COMPRESSOR TIME GUARDS
System Pilot TM Interface .............................
5
• COOL MODE SELECTION PROCESS
CON Tables and Display .............................
5
• COOLING MODE DIAGNOSTIC HELP
• GENERICS STATUS DISPLAY TABLE
• SUMZ COOLING ALGORITHM
START-UP ........................................
7-27
• DEMAND LIMIT CONTROL
Unit Preparation .....................................
7
• HEAD PRESSURE CONTROL
Unit Setup ...........................................
7
• ECONOMIZER INTEGRATION WITH
Internal Wiring .......................................
7
MECHANICAL COOLING
Accessory Installation ...............................
7
Heating Control ....................................
5O
Crankcase Heaters ..................................
7
• SETTING UP THE SYSTEM
Evaporator Fan ......................................
7
• HEAT MODE SELECTION PROCESS
Controls .............................................
7
• TEMPERATURE DRIVEN HEAT MODE
Gas Heat ............................................
7
EVALUATION
CONTROLS QUICK START ......................
27-29
• HEAT MODE DIAGNOSTIC HELP
Two-Stage Constant Volume Units with
• INTEGRATED GAS CONTROL BOARD LOGIC
Mechanical Thermostat ..........................
27
• RELOCATE SAT SENSOR FOR HEATING IN
Two-Stage Constant Volume Units with
LINKAGE SYSTEMS
Space Sensor ....................................
27
• MORNING WARM UP
Variable Air Volume Units Using Return Air Sensor
• TEMPERING MODE
or Space Temperature Sensor ....................
28
Static Pressure Control ............................
57
Multi-Stage Constant Volume Units with
• OPERATION
Mechanical Thermostat ..........................
28
• SETTING UP THE SYSTEM
Multi-Stage Constant Volume Units with
• STATIC PRESSURE RESET OPERATION
Space Sensor ....................................
28
• RELATED POINTS
Economizer Options ................................
28
Fan Status Monitoring ..............................
59
Indoor Air Quality Options ..........................
29
• GENERAL
Exhaust Options ....................................
29
• SETTING UP THE SYSTEM
Programming Operating Schedules ................
29
• SUPPLY FAN STATUS MONITORING LOGIC
SERVICE TEST ..................................
29,30
Dirty Filter Switch ..................................
60
General .............................................
29
Economizer ........................................
60
Service Test Mode Logic ...........................
29
• SETTING UP THE SYSTEM
Independent Outputs ...............................
30
• ECONOMIZER OPERATION
Fans in Service Test Mode .........................
30
• UNOCCUPIED ECONOMIZER FREE COOLING
Cooling in Service Test Mode .......................
30
• ECONOMIZER OPERATION CONFIGURATION
Heating in Service Test Mode .......................
30
• ECONOMIZER DIAGNOSTIC HELP
THIRD PARTY CONTROL ........................
3L32
Building Pressure Control ..........................
63
Thermostat .........................................
3]
• BUILDING PRESSURE CONFIGURATION
Alarm Output .......................................
3]
• CONSTANT VOLUME 2-STAGE CONTROL
Remote Switch .....................................
3!
OPERATION
VFD Control ........................................
3]
• MULTIPLE POWER EXHAUST STAGE BUILDING
Supply Air Reset ...................................
3]
PRESSURE CONTROL OPERATION
Demand Limit Control ..............................
3]
• VFD POWER EXHAUST BUILDING PRESSURE
Demand Controlled Ventilation Control .............
3!
CONTROL
CONTROLS OPERATION ........................
32-75
Smoke Control Modes ..............................
66
Modes ..............................................
32
• FIRE-SMOKE INPUTS
• SYSTEM MODES
• AIRFLOW CONTROL DURING THE
• HVAC MODES
FIRE-SMOKE MODES
• RELEVANT ITEMS

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480050-01
Printed in U.S.A.
Form 48/5OA-7T
Pg 1
5-08
Replaces: 48/50A-6T

CONTENTS

SAFETY

(cont)

Page
Indoor Air Quality Control ..........................
67
• OPERATION
• SETTINGUP THE SYSTEM
• PRE-OCCUPANCY PURGE
Dehumidification
and Reheat ......................
69
• SETTINGUP THE SYSTEM
• OPERATION
Temperature Compensated Start ...................
71
• SETTINGUP THE SYSTEM
• TEMPERATURE COMPENSATED START LOGIC
Carrier Comfort Network ® (CCN) System ...........
71
Alert Limit Configuration ...........................
72
Sensor Trim Configuration .........................
73
Discrete Switch Logic Configuration ...............
74
Display Configuration ..............................
74
Remote Control Switch Input .......................
74
Hot Gas Bypass ....................................
75
Space Temperature Offset .........................
75
TIME CLOCK CONFIGURATION .................
75-77
TROUBLESHOOTING ..........................
77-i01
Complete Unit Stoppage ...........................
77
Single Circuit Stoppage ............................
77
Service Analysis ...................................
77
Restart Procedure .................................
77
Thermistor Troubleshooting .......................
77
Transducer Troubleshooting .......................
78
Forcing Inputs and Outputs ........................
90
Run Status Menu ...................................
90
• AUTO VIEW OF RUN STATUS
• ECONOMIZER RUN STATUS
• COOLING INFORMATION
• MODE TRIP HELPER
• CCN/LINKAGE DISPLAY TABLE
• COMPRESSOR RUN HOURS DISPLAY TABLE
• COMPRESSOR STARTS DISPLAY TABLE
• TIME GUARD DISPLAY TABLE
• SOFTWARE VERSION NUMBERS DISPLAY TABLE
Alarms and Alerts ..................................
93
MAJOR SYSTEM COMPONENTS ..............
101-127
General ...........................................
101
Factory-Installed Components ....................
101
Accessory Control Components ..................
124
SERVICE ......................................
128-139
Service Access ...................................
128
Cleaning ..........................................
128
Lubrication .......................................
130
Evaporator Fan Performance Adjustment .........
130
Evaporator Fan Coupling Assembly ...............
130
Evaporator Fan Service and Replacement ........
131
Belt Tension Adjustment ..........................
131
Evaporator-Fan Motor Replacement ...............
131
Condenser-Fan Adjustment .......................
132
Four-Inch Filter Replacement .....................
132
Power Failure .....................................
132
Refrigerant Charge ................................
132
Thermostatic Expansion Valve (TXV) ..............
132
Gas Valve Adjustment ............................
132
Main Burners .....................................
139
Filter Drier ........................................
139
Replacement Parts ................................
139
APPENDIX A -- LOCAL DISPLAY TABLES .... 140-147
APPENDIX B -- CCN TABLES .................
148-160
APPENDIX C -- VFD INFORMATION ...........
161-169
APPENDIX D -- MODE SELECTION
PROCESS .......................................
170
INDEX .............................................
171
CONTROLS SET POINT AND
CONFIGURATION LOG ..................
CL-1 to CL-5
UNIT START-UP CHECKLIST .....................
CL-6

CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained
personnel can perform the basic maintenance functions of replacing filters. Trained service personnel should perform all
other operations.
When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply. Follow all safety
codes. Wear safety glasses and work gloves. Use quenching
cloth for unbrazing operations. Have fire extinguishers available for all brazing operations.

Before performing service or maintenance operation on
unit turn off and lock off main power switch to unit.
Electrical shock can cause personal injury and death.
Shut off all power to this equipment during installation
and service. The unit may have an internal non-fused
disconnect or a field-installed disconnect. Note that the
unit may also be equipped with a convenience outlet,
that this outlet is wired to the line side of the unitmounted disconnect and will remain hot when the
disconnect in the unit is off. There is a separate fuse/
disconnect for the convenience outlet.

Puron (R-410A) refrigerant systems operate at higher pressures than standard R-22 systems. Do not use R-22 service
equipment or components on Puron refrigerant equipment.
If service equipment is not rated for Puron refrigerant,
equipment damage or personal injury may result.

This unit uses a lnicroprocesso>based electronic control
system. Do not use jumpers or other tools to short out components or to bypass or otherwise depart from recommended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the electronic
modules or electrical components.

1. Improper installation, adjustlnent, alteration, service,
or maintenance can cause property damage, personal
injury, or loss of life. Refer to the User's Inforlnation
Manual provided with this unit for more details.
2.

Do not store or use gasoline or other flalmnable vapors and liquids in the vicinity of this or any other
appliance.

What to do it'you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any phone
in your building.
3. IMMEDIATELY
call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
4. If you cannot reach your gas supplier call the fire
department.

GENERAL
This book contains Start-Up, Controls Operation, Troubleshooting and Service information
for the 48/50A
Series
rooftop units. See Table 1. These units are equipped with
(_nfortLink
TM
controls.
Use this guide in conjunction with the separate installation
instructions packaged with the unit. Refer to the Wiring Diagrains literature for more detailed wiring information.

Table 1 -- A Series Product Line
UNIT
48AJ
48AK
48AW
48AY
48A2
48A3
48A4
48A5
50AJ
50AK
50AW
50AY

APPLICATION
CV Unit with Gas Heat, Vertical Supply
VAV Units with Gas Heat, Vertical Supply
CV Unit with Gas Heat, Horizontal Supply
VAV Unit with Gas Heat, Horizontal Supply
CV Unit with Gas Heat, Vertical Supply with MCHX Coil
VAV Unit with Gas Heat, Vertical Supply with MCHX Coil
CV Unit with Gas Heat, Horizontal Supply with MCHX Coil
VAV Unit with Gas Heat, Horizontal Supply with MCHX Coil
CV Unit with Optional Electric Heat, Vertical Supply
VAV Unit with Optional Electric Heat, Vertical Supply
CV Unit with Optional Electric Heat, Horizontal Supply
VAV Unit with Optional Electric Heat, Horizontal Supply
CV Unit with Optional Electric Heat, Vertical Supply with MCHX
Coil

50A2
50A3

VAV Unit with Optional Electric Heat, Vertical Supply with MCHX
Coil

50A4

CV Unit with Optional Electric Heat, Horizontal Supply with
MCHX Coil

50A5

VAV Unit with Optional
MCHX Coil

Electric Heat, Horizontal

Supply with

LEGEND
CV
MCHX
VAV

----

Constant Volume
Microchannel Heat Exchanger
Variable Air Volume

The A Series units provide ventilation, cooling, and heating
(when equipped) in variable air volume (VAV), variable volume
and temperature (VVT(R)), and constant volume (CV) applications. The A Series units contain
the factory-installed
(_mfortLink TM control system which provides full system
management. The main base board (MBB) stores hundreds of
unit configuration settings and 8 time of day schedules. The
MBB also performs self diagnostic tests at unit start-up, monitors the operation of the unit, and provides alarms and alert information. The system also contains other optional boards that
are connected to the MBB through the Local Equipment Network (LEN). Information on system operation and stares are
sent to the MBB processor by various sensors and optional
boards that are located at the unit. Access to the unit controls for
configuration, set point selection, schedule creation, and service
can be done through a unit-mounted scrolling marquee. Access
can also be done through the Carrier Comfort Network R>(CCN)
system using the ComfortVIEW rM software, the accessory
Navigator TM hand-held display, or the System Pilot TM interface.
The (_nfortLink
system controls all aspects of the rooftop.
It controls the supply-fan motor, compressors,
and economizers to maintain the proper temperature conditions. The controls
also cycle condenser fans to maintain suitable head pressure.
All VAV units are equipped with a standard VFD (variable frequency drive) for supply fan speed control and supply duct
pressure control. The (_mfortLink
controls adjust the speed of
the VFD based on a static pressure sensor input. In addition,
the (_mfortLink
controls can raise or lower the building pressure using multiple power exhaust fans controlled from economizer damper position or from a building pressure sensor. The
control safeties are continuously monitored to ensure safe operation under all conditions. Sensors include suction pressure
transducers, discharge pressure transducers, and saturated condensing temperature sensors which allow for display of operational pressures and saturation temperatures.

A scheduling function, prograimned
by the user, controls
the unit occupied/unoccupied
schedule. Up to 8 different
schedules can be progralmned.
The controls also allow the service person to operate a quick
test so that all the controlled components can be checked for
proper operation.

Conventions
Used in This Manual E The following conventions for discussing configuration points for the local display (scrolling marquee or Navigator accessory) will be
used in this manual.
Point names will be written with the Mode name first, then
any sub-modes, then the point name, each separated by an
arrow symbol (--->). Names will also be shown in bold and
italics. As an example, the IAQ Economizer Ovemde Position
which is located in the Configuration mode, Indoor Air Quality
Configuration
sub-mode,
and the Air Quality Set Points
sub-sub-mode,
would
be written
as (bnfiguration--€
IAQ---_IAQ.SP-_IQ.O.P.
A list of point names can be found in
Appendix A.
This path name will show the user how to navigate through
the local display to reach the desired configuration. The user
would scroll through the modes and submodes
using the
[] and _--] keys. The arrow symbol in the path name represents pressing _
menu structure.

to move

into the next level of the

When a value is included as part of the path name, it will be
shown at the end of the path name after an equals sign. If the
value represents a configuration setting, an explanation will be
shown in parentheses after the value. As an example, Configuration--+IAQ---)AQ. CF--+IQ.AC = 1 (IAQ Analog Input).

Pressing the _
and _
keys simultaneously
at any thne will display an expanded text description of the fourcharacter point name. The expanded description is shown in the
local display tables (Appendix A).
The CCN point names are also referenced in the local
display tables for users configuring the unit with CCN software
instead of the local display. The CCN tables are located in
Appendix B of this manual.
BASIC
ComfortLink

CONTROL

Controls

USAGE

E The (_mfortLink

control

system is a comprehensive unit-management
system. The control system is easy to access, configure, diagnose and troubleshoot.
The control is flexible, providing two types of constant
volume cooling control sequences, two variable air volume
cooling control sequences, and heating control sequences for
two-stage electric and gas systems, and for multiple-stage gas
heating, in both Occupied and Unoccupied schedule modes.
This control also manages:
•
•
•
•

•
•
•
•
•

VAV duct pressure (through optional VFD), with reset
Building pressure through two different power exhaust
schemes
Condenser
fan cycling for mild ambient head pressure
control
Space ventilation
control, in Occupied and Unoccupied
periods, using CO2 sensors or external signals, with ventilation defined by damper position
Smoke control functions
Occupancy
schedules
Occupancy
or start/stop sequences based on third party
signals
Alarm status and history and run time data
Management
of a complete unit service test sequence

System
diagnostics
areenhanced
bytheuseof multiple
external
sensors
forairtemperatures,
airpressures,
refrigerant
temperatures,
andrefrigerant
pressures.
Unit-mounted
actuatorsprovide
digitalfeedback
datatotheunitcontrol.
The(_l_fortLinkcontrolsystem
is fullyCOlrununicating
andcable-ready
forconnection
totheCarrier
Comfort
Network
(CCN)buildingmanagement
system.
Thecontrolprovides
high-speed
colmnunications
for remotemonitoring
via the
Internet.
Multipleunitscanbelinkedtogether
(andtoother
(_l_fortLink
control
equipped
units)usinga3-wirecolmnunication
bus.
The(_n?fortLink
control
system
iseasytoaccess
through
theuseofaunit-mounted
display
module.
Thereisnoneedto
bringaseparate
computer
tothisunitforstart-up.
Access
to
control
menus
isshnplified
bytheabilitytoquicklyselect
from
11menus.
A scrolling
readout
provides
detailed
explanations
ofcontrol
reformation.
Onlyfour,large,
easy-to-use
buttons
are
required
tomaneuver
through
theentire
controls
menu.
For addedserviceflexibility,an accessory
hand-held
Navigator
module
isalsoavailable.
Thisportable
device
hasan
extended
colmnunication
cablethatcanbeplugged
intothe
unit'scolmnunication
network
either
atthemare
control
boxor
atthe opposite end of the unit, at a remote modular plug. The
Navigator display provides the same menu structure, control
access and display data as is available at the unit-mounted
scrolling marquee display.

Scrolling Marquee

-- This device is the standard interface used to access the control information, read sensor values,
and test the unit. The scrolling marquee is located in the main
control box. The scrolling marquee display is a 4-key, 4-character LED (light-emitting
diode) display module. The display
also contains an Alarm Stares LED. See Fig. 1. The display is
easy to operate using 4 buttons and a group of 11 LEDs that indicate the following menu structures, referred to as modes (see
Appendix A):
• Run Status
• Service Test
• Temperatures
• Pressures
• Set points
• Inputs
• Outputs
• Configuration
• Timeclock
• Operating Modes
• Alarms
Through the scrolling marquee, the user can access all of the
inputs and outputs to check on their values and status, configure operating parameters plus evaluate the current decision stares for operating modes. Because the A Series units are
equipped with suction pressure and saturated
condensing
temperature transducers, the scrolling marquee can also display
refrigerant circuit pressures typically obtained from service
gages. The control also includes an alarm history which can be
accessed from the display. In addition, through the scrolling

Fig. 2 -- Accessory Navigator Display

marquee, the user can access a built-in test routine that can be
used at start-up colrunissioning
to diagnose operational problems with the unit.

Accessory Navigator

TM

Display--

The

accessory

hand-held Navigator display can be used with the A Series
units. See Fig. 2. The Navigator display operates the same way
as the scrolling marquee device. The Navigator display is
plugged into the RJ-14 (LEN) jack in the main control box on
the COMM board. The Navigator display can also be plugged
into the RJ-14 jack located on the ECB (economizer control
board) located in the auxiliary control box.

Operation

-- All units are shipped from the factory with
the scrolling marquee display, which is located in the mare control box. See Fig. 1. In addition, the (_n?fortLink TM controls
also support the use of the handheld Navigator display.
Both displays provide the user with an interface to the
(_n_fortLink control system. The displays have [] and []
arrow keys, an IESCAPEI key and an _
key. These
keys are used to navigate through the different modes of the
display structure. The Navigator and the scrolling marquee operate in the same manner, except that the Navigator display has
multiple lines of display and the scrolling marquee has a single
line. All further discussions
be based on the scrolling
menu

and examples in this document
marquee

will

display. See Table 2 for the

structure.

The four keys are used to navigate through the display
structure, which is organized in a tiered mode structure. If the
buttons have not been used for a period, the display will default
to the AUTO VIEW display category as shown under the RUN
STATUS category. To show the top-level display, press the
]ESCAPE]

key

until

a

blank

display

is shown.

Then

use the [_ and []
arrow keys to scroll through the top-level
categories (modes). These are listed in Appendix A and will be
indicated on the scrolling marquee by the LED next to each
mode listed on the face of the display.
When a specific

O

mode

or sub-mode

is located,

push the

key to enter the mode. Depending on the mode, there
may be additional tiers. Continue to use the _
and _
keys
and the _
keys until the desired display item is found.
At any time, the user can move back a mode level by pressing

Alarms

©_

the ] ESCAPE]

Fig. 1 -- Scrolling Marquee

key. Once an item has been selected the display

will flash showing the item, followed by the item value and
then followed by the item units (if any).

f

"-,

Items in the Configuration
and Service Test modes are
password protected. The display will flash PASS and WORD
when required. Use the _
four digits of the password.

and arrow keys to enter the
The default password is 1111.

Pressing the IESCAPEI and _
keys simultaneously
will scroll an expanded text description across the display indicating the full meaning of each display point. Pressing the
I ESCAPEI and _
keys when the display is blank
(MODE LED level) will return the display to its default menu
of rotating AUTO VIEW display items. In addition, the password will need to be entered again before changes can be made.
Changing item values or testing outputs is accomplished in
the same manner. Locate and display the desired item. If the
display is in rotating auto-view, press the _
key to stop
the display at the desired item. Press the _
key again so
that the item value flashes. Use the arrow keys to change the
value of state of an item and press the _
key to accept
it. Press the ]ESCAPE] key and the item, value or units display
will resume. Repeat the process as required for other items.
If the user needs to force a variable, follow the same process
as when editing a configuration parameter. A forced variable
will be displayed with a blinking "f' following its value. For
example, if supply fan requested (FAN.F) is forced, the display
shows "YESf', where the "f' is blinking to signify a force on
the point. Remove the force by selecting the point that is forced
with the _
key and then pressing
row keys simultaneously.

the [_

and [_

ar-

Depending on the unit model, factory-installed
options and
field-installed
accessories, some of the items in the various
Mode categories may not apply.

System

Pilot TM

Interface

E

The System Pilot

(33PILOT-01) device is a component of Carrier's 3V rM system
and serves as a user-interface and configuration tool for all Carrier COlrnnunicating devices. The System Pilot device can be
used to install and COlmnission a 3V zoning system, linkage
compatible air source, universal controller, and all other devices operating on the CCN system.
Additionally,
the System Pilot device can serve as a
wall-lnounted
telnperamre
sensor
for space telnperamre
measurement. The occupant can use the System Pilot device to
change set points. A security feature is provided to limit access
of features for unauthorized users. See Fig. 3 for System Pilot
details.

CCN Tables
and Display E In addition to the unitmounted scrolling marquee display, the user can also access the
same inforlnation through the CCN tables by using the Service
tool or other CCN programs. Details on the CCN tables are
SUlnmarized in Appendix B. The variable names used for the
CCN tables and the scrolling marquee tables may be different
and more items are displayed in the CCN tables. As a reference, the CCN variable names are included in the scrolling
marquee tables and the scrolling marquee names are included
in the local display tables in Appendix B.

NAVIGATE/_
EXIT

\

"!?

/

o

\

-MODIFY/
SELECT

J

SCROLL

_

PAGE

Fig. 3 -- System Pilot TM User Interface

GENERICS STATUS DISPLAY TABLE -- The GENERICS
points table allows the service/installer the ability to create a
custom table in which up to 20 points from the 5 CCN
categories (Points, Config, Service-Config, Set Point, and
Maintenance) may be collected and displayed.
In the Service-Config table section, there is a table named
"generics". This table contains placeholders for up to 20 CCN
point names and allows the user to decide which points are displayed in the GENERICS points table under the local display.
Each one of these placeholders allows the input of an 8-character
ASCII string. Using a CCN interface, enter the Edit mode for the
Service-Config table "generics" and enter the CCN name for
each point to be displayed in the custom points table in the order
they will be displayed. When done entering point names, download the table to the rooftop unit control.
IMPORTANT:
The
computer
system
software
(ColnfortVIEW
TM,
Service Tool, etc.) that is used to
interact with CCN controls always saves a template of
items it considers as static (e.g., limits, units, forcibility, 24-character
text strings, and point names) after
the software uploads the tables from a control. Thereafter, the software is only concerned
with run time
data like value and hardware/force
stares. With this in
mind, it is important that anytime a change is made to
the Service-Config
table "generics"
(which in turn
changes the points contained in the GENERICS point
table), that a complete new upload be performed. This
requires
that any prex4ous
table
database
be
completely
removed first. Failure to do this will not
allow the user to display the new points that have been
created and the CCN interface will have a different
table database than the unit control.

Table 2 -- Scrolling Marquee Menu Display Structure
( ComfortLink TM Display Modes)
RUN
STATUS

SERVICE
TEST

TEMPERATURES

PRESSURES

Auto View of
Run Status
(VIEW)

Service Test Mode
(TEST)

Air
Temperatures
(AIR.T)

Air Pressures
(AIR.P)

$

4.

Econ
Run Status
(ECON)

Software
Command
Disable
(STOP)

Cooling
Information
(COOL)

Soft Stop
Request
(S.STP)

$

$

Mode
Trip Helper
(TRIP)

$

4.

4.

Supply Fan
Request
(FAN.F)

4.

4.
Refrigerant
Temperatures
(REET)

4.
Refrigerant
Pressures
(REEP)

SETPOINTS
Occupied Heat
Setpoint
(OHSP)

4.
Occupied Cool
Setpoint
(OCSP)
4.
Unoccupied
Heat Setpoint
(UHSP)

4.

Unoccupied
Cool Setpoint
(UCSP)

4.

INPUTS

OUTPUTS

CONFIGURATION

General Inputs
(GEM.I)
4.

Fans
(FANS)
4.

Unit
Configuration
(UNIT)

Compressor
Feedback
(FD.BK)
4.
Thermostat
Inputs
(STAT)
4.
Fire-Smoke
Modes
(FIRE)
4.

CCN
Linkage
(LINK)

4 in. Filter
Change Mode
(F.4.CH)

Heat - Cool
Setpoint
(GAP)

Relative
Humidity
(RELH)
4.

Compressor
Run Hours
(HRS)

Test Independent
Outputs
(INDP)

VAV Occ
Cool On
(V.C.ON)

Air Quality
Sensors
(AIR.Q)
4.

$

$
Compressor
Starts
(STRT)

$

Timeguards
(TMGD)

4.

Software
Version
Numbers
(VERS)

4.

4.
Test Fans
(FANS)

4.

Test Cooling
(COOL)

4.

Test Heating
(HEAT)

4.

4.
VAV Occ
Cool Off
(V.C.OF)

4.

Supply Air
Setpoint
(SASP)

4.

Reset Inputs
(RSET)
4.
4-20 Milliamp
Inputs
(4-20)

Cooling
(COOL)
4.
Heating
(HEAT)
4.
Economizer
(ECON)
4.

4.

Cooling
Configuration
(COOL)

(EDT.R)
4.

Configuration
(HEAT)
4.
Supply Static
Press. Config.
(SP)

4.

Economizer
Configuration
(ECON)

4.

Building Press
Configs
(BP)
4.
Cool/Heat
Setpt. Offsets
(D.LV.T)

4.

Supply Air
Setpoint Hi
(SA.HI)

Demand Limit
Config.
(DMD.L)

4.

4.

Supply Air
Setpoint Lo
(SA.LO)

Indoor Air
Quality Cfg.
(IAQ)

4.

4.

Heating Supply
Air Setpoint
(SA.HT)

Dehumidification
Config.
(DEHU)

Tempering
Purge SASP
(TPRG)

CCN
Configuration
(CCN)

4.

4.

4.

4.

Tempering in
Cool SASP
(TCL)

Alert Limit
Config.
(ALLM)

Tempering in
Vent Occ SASP
(TV.OC)

Sensor Trim
Config.
(TRIM)

4.

OPERATING
MODES

ALARMS

4.

System
Mode
(SYS.M)

Currently
Active
Alarms
(CURR)

Month, Date,
Day and Year
(DATE)

HVAC Mode
(HVAC)

Local Time
Schedule
(SCH.L)

Control Type
(CTRL)

Time of Day
(TIME)

4.

4.

4.

4.
Evap/Discharge
Temp. Reset

Heating
General
Outputs
(GEM.O)

TIME
CLOCK

4.

4.

4.

Tempering in
Vent Unocc.
SASP
(T.V.UN)

Switch
Logic
(SW.LG)

4.

Display
Configuration
(DISP)

4.
Local
Holiday
Schedules
(HOLL)

4.

Daylight
Savings
Time
(DAWS)

4.

Mode
Controlling
Unit
(MODE)

4.
Reset All
Current
Alarms
(R.CUR)

4.

Alarm
History
(HIST)

START-UP
IMPORTANT:
Do not attempt
to start unit, even
momentarily,
until all items on the Start-Up Checklist
and the following steps have been completed.

Unit Preparation
accordance
codes.

E Check that unit has been installed in
with the installation instructions and applicable

Controls

E

Use the following steps for the controls:

disabled. To enable the control, set Local Machine Disable
IMPORTANT:
The unit
is shipped with the unit control
(Service
Test-gSTOP)
to No.
1. Set any control configurations
that are required (fieldinstalled accessories, etc.). The unit is factory configured
for all appropriate factory-installed options.
2.

Enter unit set points. The unit is shipped with the set point
default values. If a different set point is required use the
scrolling marquee, Navigatoff M accessory or Service
Tool software to change the configuration valves.

_ Ensure that all electrical connections
in the control box are tightened as required. If the unit has
staged gas heat make sure that the leaving air temperature
(LAT) sensors have been routed to the supply ducts as required.

3.

If the internal unit schedules are going to be used configure the Occupancy schedule.

4.

Verify that the control
current requirements.

Accessory Installation

5.

Using Service
components.

6.

If the unit is a VAV unit make sure to configure the VFD
static pressure set point using the display. To checkout the
VFD use the VFD instructions shipped with the unit.

Unit Setup E

Make sure that the economizer hoods have
been installed and that the outdoor filters are properly installed.

Internal Wiring

-- Check to make sure that all
accessories including space thermostats and sensors have been
installed and wired as required by the instructions and unit
wiring diagrams.

Crankcase Heaters

-- Crankcase heaters are energized
as long as there is power to the unit, except when the compressors are running.
IMPORTANT:
Unit power must be on for 24 hrs prior
to start-up of compressors.
Otherwise damage to compressors may result.

Evaporator Fan

-- Fan belt and fixed pulleys are factoryinstalled. See Tables 3-38 for fan performance.
Remove tape
from fan pulley, and be sure that fans rotate in the proper direction. See Table 39 for motor limitations. See Tables 40A and
40B for air quantity limits. Static pressure drop for power
exhaust is negligible. To alter fan performance, see Evaporator
Fan Performance Adjustment section on page 130.

time periods

Test mode,

progralnmed

verify operation

meet

of all major

Gas Heat -- Verifygas pressure before turning on gas heat
as follows:
1. Turn off field-supplied
to the unit.

manual

gas stop, located external

2.

Connect pressure gages to supply gas tap, located at fieldsupplied manual shutoffvalves.

3.

Connect pressure
gas valve.

4.

Supply gas pressure must not exceed 13.5 m. wg. Check
pressure at field-supplied shut-offvalve.

5.

Turn on manual gas stop and initiate a heating demand.
Jumper R to Wl in the control box to initiate heat.

6.

Use the Service Test procedure

7.

After the unit has mn for several minutes, verify that
incoming pressure is 6.0 m. wg or greater and that the
manifold pressure is 3.5 in wg. If manifold pressure must
be adjusted refer to Gas Valve Adjustment section.

gages to manifold

pressure

tap on unit

to verify heat operation.

I
]

Table 3 -- Fan Performance -- 48AJ,AK020,025
AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.2
Rpm
328
369
415
463
488
513
564
616
669
723
750
777

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.4
Bhp
0.62
0.97
1.43
2.01
2.36
2.74
3.61
4.64
5.84
7.20
7.95
8.75

Rpm
406
439
477
519
541
564
612
661
711
762
788
814

2.2
Rpm
814
837
861
885
898
912
940
971
1004
1039
1058
1077

Bhp
3.01
3.55
4.17
4.89
5.28
5.71
6.66
7.75
9.00
10.42
11.20
12.03

Bhp
0.84
1.19
1.65
2.25
2.60
2.98
3.87
4.91
6.11
7.49
8.25
9.05

Rpm
472
500
533
570
590
611
655
701
749
798
823
848

2.4
Rpm
845
869
893
917
930
943
970
1000
1032
1066
1085
1103

AVAILABLE
0.8

0.6
Bhp
1.07
1.43
1.90
2.50
2.86
3.24
4.13
5.18
6.40
7.78
8.54
9.35

Rpm
876
900
923
947
960
973
999
1028
1059
1093
1110
1129

Bhp
1.30
1.69
2.17
2.78
3.13
3.52
4.42
5.47
6.69
8.08
8.85
9.66

AVAILABLE
2.8

2.6
Bhp
3.26
3.82
4.46
5.20
5.61
6.04
7.00
8.10
9.36
10.79
11.57
12.40

Rpm
529
554
584
618
636
655
696
739
785
831
855
880

Bhp
3.51
4.10
4.76
5.51
5.93
6.37
7.35
8.46
9.73
11.16
11.94
12.77

Rpm
905
929
953
977
989
1002
1028
1056
1086
1119
1136
1154

Bhp
3.76
4.37
5.05
5.83
6.25
6.70
7.69
8.82
10.09
11.53
12.32
13.15

EXTERNAL
1.0
Rpm
580
604
631
662
679
697
735
776
819
864
887
910

Rpm
934
958
981
1005
1017
1030
1055
1083
1112
1144
1161
1178

STATIC PRESSURE(in.
wg)
1.2
1.4

Bhp
1.54
1.95
2.45
3.06
3.42
3.81
4.71
5.77
6.99
8.39
9.16
9.97

EXTERNAL
3.0

Rpm
626
650
676
704
720
737
772
811
852
895
917
940

4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

0.2
Rpm
331
374
421
471
522
574
628
682
736
791
846
902

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

Bhp
0.63
0.98
1.45
2.04
2.78
3.66
4.71
5.91
7.30
8.86
10.61
12.56

2.2
Rpm
815
839
864
890
917
946
978
1012
1048
1087
1128
1171

Bhp
3.02
3.57
4.20
4.93
5.76
6.73
7.84
9.10
10.54
12.17
13.98
16.00

0.4
Rpm
408
443
482
526
572
621
671
722
774
827
880
934

Bhp
0.85
1.20
1.68
2.28
3.03
3.92
4.97
6.19
7.59
9.16
10.93
12.89

2.4
Rpm
847
871
896
921
948
976
1007
1040
1075
1113
1153
1194

AVAILABLE
0.8

0.6

Bhp
4.02
4.64
5.35
6.14
6.58
7.04
8.04
9.18
10.46
11.91
12.70
13.54

Rpm
474
503
538
576
619
664
711
759
809
860
912
964

Bhp
1.08
1.45
1.93
2.54
3.29
4.19
5.25
6.48
7.88
9.46
11.24
13.21

2.6
Bhp
3.27
3.84
4.49
5.24
6.09
7.07
8.19
9.47
10.91
12.54
14.36
16.38

Rpm
Bhp
877
3.52
902
4.11
926
4.79
951
5.55
977
6.42
1005
7.42
1035
8.55
1067
9.83
1102
11.28
1138
12.91
1177
14.74
................

Rpm
531
558
589
623
662
704
748
795
842
891
941
992

Bhp
1.31
1.70
2.20
2.81
3.57
4.47
5.54
6.77
8.18
9.78
11.56
13.54

AVAILABLE
2.8
Rpm
Bhp
906
3.77
931
4.39
956
5.08
980
5.87
1006
6.76
1033
7.76
1063
8.91
1094
10.20
1127
11.66
1163
13.30
..............

EXTERNAL
1.0
Rpm
581
607
636
668
704
743
784
828
874
922
970
1020

Rpm
935
960
984
1009
1034
1061
1089
1120
1152
1187

LEGEND
Bhp -- Brake Horsepower
edb -- Entering Dry Bulb
ewb -- Entering Wet Bulb
NOTES:
1. Fan performance
is based on wet coils, economizer,
losses, and clean 2-in. filters.

Rpm
668
692
717
744
759
775
808
845
884
925
947
969

Rpm
961
985
1009
1033
1045
1057
1082
1109
1138
1169
1185
..........

Bhp
4.28
4.92
5.65
6.46
6.90
7.37
8.39
9.54
10.84
12.30
13.09

Rpm
627
653
680
710
743
780
819
861
905
951
998
1046

1.6
Rpm
708
731
756
782
796
811
843
878
915
955
976
997

(in. wg)
3.4

Bhp
1.79
2.23
2.75
3.39
4.16
5.08
6.15
7.40
8.82
10.42
12.21
14.21

Rpm
Bhp
962
4.29
987
4.94
1012
5.68
1036
6.50
1061
7.43
1088
8.46
1116
9.63
1145
10.95
1177
12.42
..........

2. Conversion
Watts =

Bhp
2.03
2.49
3.04
3.69
4.47
5.40
6.47
7.72
9.15
10.75
12.56
14.55

Bhp
4.55
5.22
5.97
6.82
7.76
8.82
10.00
11.33

Rpm
1038
1063
1087
1110
1122
1134
1159
1185
....

Rpm
780
804
828
852
866
879
909
940
975
1012
1031
1051

Bhp
5.06
5.76
6.54
7.41
7.88
8.38
9.45
10.65

Rpm
1062
1087
1111
1135
1147
1159
1183
--

Bhp
2.52
3.03
3.62
4.31
5.11
6.05
7.14
8.40
9.83
11.45
13.26
15.26

Rpm
781
806
831
857
885
915
948
983
1021
1061
1103
1147

Bhp
5.07
5.78
6.57
7.45
8.43
9.52
10.74

Rpm
1063
1089
1114
1138
1163
1188
--

Bhp
2.76
3.28
3.88
4.58
4.96
5.38
6.32
7.40
8.65
10.07
10.84
11.67

4.0
Bhp
5.32
6.04
6.84
7.73
8.21
8.72
9.81
--

Units

Bhp
2.28
2.76
3.33
4.00
4.79
5.72
6.81
8.06
9.48
11.10
12.90
14.91

1.8
Rpm
746
771
796
823
851
883
917
954
993
1034
1078
1122

3.6
Rpm
1014
1039
1064
1088
1113
1139
1166
1195

2.0
Bhp
2.51
3.01
3.59
4.27
4.65
5.06
5.98
7.06
8.30
9.72
10.49
11.31

3.8

Bhp
4.80
5.48
6.24
7.09
7.56
8.04
9.10
10.28
11.60

1.6
Rpm
709
734
759
787
817
850
885
924
965
1007
1052
1098

(in. wg)
3.4

Rpm
988
1014
1038
1063
1088
1114
1141
1170
........

Rpm
745
769
793
818
832
846
876
909
945
984
1004
1024

3.6
Rpm
1013
1038
1062
1085
1097
1109
1134
1160
1188
......

(in. wg)
1.4

Rpm
670
695
721
749
781
815
853
893
935
979
1025
1072

1.8

Bhp
2.27
2.74
3.30
3.96
4.33
4.74
5.65
6.72
7.96
9.37
10.15
10.97

and 48A2,A3025-030

STATIC PRESSURE
3.2

Bhp
4.03
4.66
5.38
6.18
7.09
8.11
9.27
10.57
12.04
13.68

Bhp
2.02
2.48
3.01
3.65
4.02
4.42
5.33
6.40
7.63
9.04
9.81
10.63

Rpm
Bhp
987
4.54
1012
5.20
1036
5.94
1059
6.78
1071
7.23
1083
7.71
1109
8.75
1135
9.91
1163 11.22
1193 12.68
........

STATIC PRESSURE
1.2

Bhp
1.55
1.96
2.47
3.10
3.86
4.77
5.84
7.08
8.49
10.09
11.88
13.87

EXTERNAL
3.0

Bhp
1.78
2.21
2.73
3.36
3.72
4.11
5.02
6.08
7.30
8.71
9.48
10.30

STATIC PRESSURE
3.2

Table 4 -- Fan Performance -- 48AJ,AK027,030
AIRFLOW
(CFM)

and 48A2,A3020 Units

Bhp
4.81
5.50
6.27
7.14
8.10
9.17
10.37
11.71

2.0

3.8
Rpm
1039
1064
1089
1114
1138
1164
1191
....

Bhp
2.77
3.30
3.91
4.62
5.44
6.39
7.49
8.75
10.19
11.80
13.62
15.63

4.0
Bhp
5.33
6.06
6.87
7.77
8.77
9.88
--

-- Bhp to watts:
Bhp x 746
Motor efficiency

roof curb, cabinet

3. Variable air volume units will operate down to 70 cfm/ton. Performance at
70 cfm/ton is limited to unloaded operation and may be additionally limited
by edb and ewb conditions.

Table 5 -- Fan Performance -- 48AJ,AK,A2,A3035
AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.2
Rpm
534
590
646
704
733
762
820
879
938
997
1056
1116
1145

AIRFLOW
(Of m)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.4
Bhp
2.46
3.27
4.23
5.35
5.97
6.63
8.09
9.72
11.54
13.86
18.78
18.20
19.49

Rpm
584
635
687
742
769
797
853
909
967
1024
1082
1140
1170

2.2

Bhp
2.80
3.63
4.62
5.77
6.40
7.08
8.56
10.22
12.07
14.11
16.35
18.80
20.10

Rpm
630
677
726
778
804
830
884
939
995
1051
1107
1164
1193

2.4

Rpm

Bhp

927
960
994
1030
1049
1069
1109
1152
1196
1243
1290

5.81
6.69
8.09
9.42
10.14
10.90
12.55
14.38
16.41
18.63
21.06

Rpm

AVAILABLE
0.8

0.6
Bhp
3.13
3.99
5.00
6.17
6.82
7.81
9.01
1O.70
12.58
14.64
16.91
19.38
20.70

Rpm
674
718
764
812
837
863
915
968
1022
1076
1132
1188
1216

Bhp
348
4.35
5.38
6.57
7.23
7.93
9.46
11.17
13.07
18.16
17.45
19.95
21.28

EXTERNAL
1.0
Rpm
716
757
800
846
870
894
944
996
1048
1102
1186
1210
1238

AVAILABLE
2.8

2,6
Bhp

Rpm

Bhp

956
6.13
989
7.25
1023
8.47
1058
9.82
1077
10.66
1095
11.33
1135
13.00
1176
14.84
1220
16.88
1265
19.12
..................

985
1018
1051
1085
1103
1122
1160
1200
1243
1287

6.45
7.60
8.85
10.23
10.97
11.76
13.44
16.31
17.36
19.61

Rpm

Bhp

1012
6.76
1045
7.94
1078
9.23
1112
10.64
1129
11.39
1147
12,18
1185
13.89
1224
15.77
1266
17.84
..............

Bhp
3.82
4.72
5.76
6.97
7.64
8.38
9.90
11.63
13.55
15.67
17.98
20.50
21.84

EXTERNAL
3.0
Rpm

Bhp

1039
1072
1104
1138
1155
1173
1209
1248
1288

7.06
8.29
9.61
11.04
11.81
12.61
14.34
16.24
18.32

STATIC PRESSURE
1.2
Rpm
756
794
835
879
902
925
973
1023
1074
1126
1179
1233
1260
STATIC

Bhp
4.16
5.08
6.18
7.38
8.05
8.77
10.34
12.09
14.03
16.17
18.50
21.05
22.40

(in. wg)
1.4
Rpm
793
830
869
911
933
955
1001
1050
1099
1150
1202
1255
1282

PRESSURE(in.
3.2

Rpm
1065
1098
1130
1163
1180
1197
1233
1271
..........

Units
1.6
Bhp
450
5.45
6.54
7.78
8.46
9.19
10.78
12.55
14.51
16.66
19.02
21.58
22.94

Rpm
829
864
902
942
963
984
1029
1076
1124
1174
1225
1276
......

wg)
3.4

1.8
Bhp
4.83
5.81
6.93
8.19
8.88
9.62
11.22
13.01
14.98
17.16
19.53
22.11

Rpm
863
897
934
972
992
1013
1056
1102
1149
1197
1247
1298

3.6

2.0
Bhp
517
6.18
7.31
8.60
9.30
10.04
11.66
13.46
15.46
17.65
20.04
22.64

Rpm
896
929
964
1002
1021
1041
1083
1127
1173
1220
1269
--

3.8

Bhp
5.49
6.54
7.70
9.01
9.72
10.47
12.10
13.92
15.93
18.14
20.55
--

4.0

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

7.37
8.63
9.98
11.44
12.23
13.04
14.79
16.70

1090
1122
1155
1188
1204
1221
1256
1293

7.67
8.96
10.35
11.84
12.64
13.47
15.24
17.17

1114
1147
1179
1212
1228
1245
1279
......

7.97
9.29
10.71
12.24
13.05
13.89
15.69

1138
1170
1203
1235
1251
1268
....

8.26
9.62
11.08
12.64
13.46
14.31

1161
1193
1226
1258
1274
1291

8.56
9.95
11.44
13.03
13.87
14.73

Table 6 -- Fan Performance -- 48AJ,AK036 Units
AVAILABLE

AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.2
Rpm
454
5O2
552
6O2
653
7O4
756
8O8
861
914
967
993

Bhp
2.15
2.90
3.81
4.89
6.15
7.60
9.24
11.10
13.18
16.49
18.03
19.40

Rpm
5O8
55O
595
642
689
738
788
838
888
94O
991
1017

(cfm)

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

1.2

Bhp
2.52
3.30
4.24
5.34
6.62
8.09
9.76
11.64
13.74
16.06
18.62
20.00

EXTERNAL

1.0

0.8
Bhp
2.90
3.71
4.67
5.80
7.11
8.60
10.29
12.19
14.31
16.66
19.23
20.61

Rpm
6O5
639
677
717
759
8O3
848
895
942
99O
1039
1064

STATIC PRESSURE
1.6

Bhp
3.29
4.12
5.11
6.26
7.59
9.11
10.83
12.74
14.88
17.24
19.86
21.24

Rpm
650
680
715
752
792
834
878
922
968
1015
1062
1086

Bhp
3.69
4.54
5.55
6.73
8.08
9.63
11.36
13.30
15.46
17.86
20.47
21.87

(in. wg)
1.8

2.0

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

693
72O
752
787
825
865
9O6
95O
994
1039
1086
1109

4.09
4.97
6.00
7.20
8.58
10.14
11.90
13.87
16.05
18.46
21.09
22.60

734
759
788
821
856
895
935
976
1019
1063
1109
1131

4.52
5.40
6.45
7.67
9.07
10.66
12.44
14.43
16.63
19.06
21.72
23.14

773
796
823
854
887
924
962
1002
1044
1087
1131
1154

4.95
5.85
6.92
8.16
9.57
11.18
12.99
15.00
17.22
19.67
22.36
23.78

811
832
857
886
918
952
989
1028
1068
1110
1153
1175

5.39
6.31
7.39
6.64
10.06
11.71
13.53
15.57
17.61
20.26
22.96
24.42

847
867
890
917
947
98O
1018
1053
1093
1133
1175
1197

5.83
6.77
7.87
9.14
10.59
12.24
14.08
16.14
18.40
20.89
23.61
26.07

Bhp
7.68
8.69
9.86
11.19
12.70
14.41
16.32
18.45
20.79
23.36
26.17
27.66

Rpm
1006
1024
1043
1064
1088
1114
1143
1174
1208
1244
1281

Bhp
10.09
11.21
12,47
13.88
18.46
17.24
19.23
21.43
23.86

Rpm
1140
1159
1177
1196
1216
1237
1262
1288

2.2
Rpm
881
901
923
948
976
1008
1042
1078
1116
1156
1197
1218

Bhp
6.29
7.24
8.35
9.64
11.11
12.77
14.64
16.71
19.00
21.61
24.26
26.71

Rpm
914
933
954
978
1005
1035
1068
1103
1140
1178
1218
1239

3.2
Rpm
1035
1053
1072
1092
1114
1139
1167
1198
1230
1265

LEGEND
Bhp -- Brake Horsepower
edb
-- Entering Dry Bulb
ewb
-- Entering Wet Bulb
NOTES:
1. Fan performance
is based on wet coils
2-in. filters.

EXTERNAL

2,4
Bhp
6.74
7.72
8.85
10.15
11.63
13.31
15.19
17.28
19.69
22.12
24.89
26.36
AVAILABLE

AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Rpm
557
596
637
68O
725
771
818
867
915
965
1015
1040

1.4

AVAILABLE

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

(in. wg)

Rpm

AIRFLOW

(cfm)

STATIC PRESSURE
0.6

AVAILABLE
AIRFLOW

EXTERNAL

0.4

Rpm
946
965
985
1007
1033
1062
1093
1127
1163
1200
1240
1260
EXTERNAL

3.4
Bhp
8.63
9.69
10.89
12.25
13.79
15.53
17.47
19.63
22.00
24.61

Rpm
1062
1081
1099
1119
1140
1164
1191
1221
1253
1286

STATIC PRESSURE
2,6
Bhp
7.21
8.20
9.35
10.66
12.16
13.86
15.76
17.86
20.19
22.74
26.62
27.00

(in. wg)
2.8
Rpm
977
995
1014
1036
1061
1088
1118
1151
1186
1222
1261
1280

STATIC PRESSURE

Rpm
1089
1108
1126
1145
1166
1189
1215
1244
1274

3.8
Bhp
9.60
10.70
11.94
13.33
14.90
16.67
18.64
20.82
23.23

2. Conversion
Watts =

Rpm
1115
1134
1152
1171
1191
1213
1238
1266
1296

--

Bhp
8,15
9.19
10.37
11.71
13.24
14.97
16.89
19.03
21.40
23.98
26.81

(in. wg)

3.6
Bhp
9.11
10.19
11.41
12.78
14.34
16.09
18.05
20.22
22.62
25.24

3.0

4.0
Bhp
10.58
11.73
13.00
14.43
16.03
17.83
19.82
22.04

Bhp to watts:
Bhp x 746
Motor efficiency

economizer

roof curb, cabinet losses

and clean

3. Variable air volume units will operate down to 70 cfm/ton. Performance at 70 cfm/ton is
limited to unloaded operation and may be additionally limited by edb and ewb conditions.

Table 7AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2
Rpm
502
552
602
653
704
756
808
861
914
967
1020
1073
1127

Bhp
2,90
3.81
4.89
6.15
7.60
9.24
11.10
13.18
15.49
18.03
20.82
23.87
27.18

Rpm
550
595
642
689
738
788
838
888
940
991
1043
1095
1147

AVAILABLE
0.8

0.6
Bhp
330
4.24
5.34
6.62
8.09
9.76
11.64
13.74
16.06
18.62
21.43
24.50
27.82

Rpm
596
637
680
725
771
818
867
915
965
1015
1066
1117
1168

Bhp
3.71
4.67
5.80
7.11
8.60
10.29
12.19
14.31
16.65
19.23
22.06
25.14
28.48

Rpm
639
677
717
759
803
848
895
942
990
1039
1088
1138
1188

Bhp
4.12
5.11
6.26
7.59
9.11
10.83
12.74
14.88
17.24
19.85
22.69
25.79
29.15

2.2
Rpm
901
923
948
976
1008
1042
1078
1116
1156
1197
1239

2.4
Bhp
7.24
8.35
9.64
11.11
12.77
14.64
16.71
19.00
21.51
24.25
27.24

Rpm
933
954
978
1005
1035
1068
1103
1140
1178
1218
1260

2,6
Bhp
772
8.85
10.15
11.63
13.31
15.19
17.28
19.59
22.12
24.89
27.89

Rpm
965
985
1007
1033
1062
1093
1127
1163
1200
1240
1280

Rpm
680
715
752
792
834
878
922
968
1015
1062
1111
1159
............

Rpm
Bhp
995
8.69
1014
9.86
1036
11.19
1061
12.70
1088
14.41
1118
16.32
1151
18.45
1186
20.79
1222
23.36
1261
26.17
..............

Bhp
454
5.55
6.73
8,08
9.63
11.36
13.30
15.46
17.85
20.47
23.33
26.44

EXTERNAL

2.8
Bhp
8,20
9.35
10.66
12,16
13.86
15.76
17.86
20.19
22.74
25.52
28.55

48AJ,AK,A2,A3040

EXTERNAL
1.0

AVAILABLE

AIRFLOW
(Of m)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.4

Fan Performance-

STATIC PRESSURE
1.2
Rpm
720
752
787
825
865
906
950
994
1039
1086
1133
1180

STATIC

3.0
Rpm
1024
1043
1064
1088
1114
1143
1174
1208
1244
1281

Bhp
4.97
6.00
7.20
8.58
10.14
11.90
13.87
16.05
18,45
21.09
23.97
27.11

PRESSURE

(in. wg)
1.4
Rpm
759
788
821
856
895
935
976
1019
1063
1109
1155
1201

Rpm
1053
1072
1092
1114
1139
1167
1198
1230
1265
..........

1.6
Bhp
540
6.45
7.67
9.07
10.66
12.44
14.43
16.63
19.06
21.72
24.62
27.77

Rpm
796
823
854
887
924
962
1002
1044
1087
1131
1176
1222

Bhp
10.19
11.41
12.78
14.34
16.09
18.05
20.22
22.62
25.24

Rpm
1108
1126
1145
1166
1189
1215
1244
1274
......

3.4
Bhp
9.69
10.89
12,25
13.79
15.53
17.47
19.63
22.00
24.61

1.8
Bhp
5.85
6.92
8,16
9.57
11.18
12.99
15.00
17.22
19.67
22.35
25.27
28.45

Rpm
832
857
886
918
952
989
1028
1068
1110
1153
1197
1242

Bhp
10.70
11.94
13.33
14.90
16.67
18.64
20.82
23.23

Rpm
1134
1152
1171
1191
1213
1238
1266
1296

2.0
Bhp
6.31
7.39
8.64
10.08
11.71
13.53
15.57
17.81
20.28
22.98
25.92
29.12

Rpm
867
890
917
947
980
1016
1053
1093
1133
1175
1219
--

Bhp
11.21
12,47
13.88
15.46
17.24
19.23
21.43
23.85

Rpm
1159
1177
1196
1216
1237
1262
1288
--

Bhp
677
7.87
9.14
10.59
12.24
14.08
16.14
18.40
20.89
23.61
26.58
--

(in. wg)

3.2
Bhp
919
10.37
11.71
13.24
14.97
16.89
19.03
21.40
23.98
26.81

Units

Rpm
1081
1099
1119
1140
1164
1191
1221
1253
1286

3.6

3.8

4.0
Bhp
11.73
13.00
14.43
16.03
17.83
19.82
22.04
--

Table 8 -- Fan Performance -- 48AJ,AK041 Units
AIRFLOW

AVAILABLE

(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2
Rpm
5O2
552
6O2
653
7O4
756
808
861
914
967
1020
1073
1127

Bhp
3.30
4.24
5.34
6.62
8.09
9.76
11.64
13.74
16.06
18.62
21.43
24.80
27.82

Rpm

Bhp

Rpm

Bhp

720
752
787
825
865
906
950
994
1039
1086
1133
1180

4.97
6.00
7.20
8.58
10.14
11.90
13.87
16.05
18.45
21.09
23.97
27.11

759
788
821
856
895
935
976
1019
1063
1109
1155
1201

5.40
6.45
7.67
9.07
10.66
12.44
14.43
16.63
19.06
21.72
24.62
27.77

796
823
854
887
924
962
1002
1044
1087
1131
1176
1222

5.85
6.92
8.16
9.57
11.18
12.99
15.00
17.22
19.67
22.38
28.27
28.48

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

901
923
948
976
1008
1042
1078
1116
1156
1197
1239

7.24
8.35
9.64
11.11
12.77
14.64
16.71
19.00
21.81
24.28
27.24

933
954
978
1005
1035
1068
1103
1140
1178
1218
1260

7.72
8.85
10.15
11.63
13.31
15.19
17.28
19.59
22.12
24.89
27.89

965
985
1007
1033
1062
1093
1127
1163
1200
1240
1280

8.20
9.35
10.66
12.16
13.86
15.76
17.86
20.19
22.74
28.82
28.55

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

1053
1072
1092
1114
1139
1167
1198
1230
1265

9.69
10.89
12.25
13.79
15.53
17.47
19.63
22.00
24.61

1081
1099
1119
1140
1164
1191
1221
1253
1286

10.19
11.41
12.78
14.34
16.09
18.05
20.22
22.62
25.24

1108
1126
1145
1166
1189
1215
1244
1274

10.70
11.94
13.33
14.90
16.67
18.64
20.82
23.23

AVAILABLE

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

EXTERNAL

2,4

AIRFLOW

STATIC PRESSURE

Rpm
639
677
717
759
8O3
848
895
942
99O
1039
1088
1138
1188

EXTERNAL

3.4

Rpm
68O
715
752
792
834
878
922
968
1015
1062
1111
1159

Rpm

Bhp

Rpm

Bhp

832
857
886
918
952
989
1028
1068
1110
1153
1197
1242

631
739
864
10.08
11.71
13.83
15.87
17.81
20.28
22.98
25.92
29.12

867
89O
917
947
98O
1016
1053
1093
1133
1175
1219

677
787
914
1059
12.24
14.08
16.14
18.40
20.89
23.61
26.58

Rpm

Bhp

Rpm

Bhp

995
1014
1036
1061
1088
1118
1151
1186
1222
1261

869
9.86
11.19
12.70
14.41
16.32
18.48
20.79
23.36
26.17

1024
1043
1064
1088
1114
1143
1174
1208
1244
1281

9.19
10.37
11.71
13.24
14.97
16.89
19.03
21.40
23.98
26.81

Rpm

Bhp

Rpm

Bhp

1134
1152
1171
1191
1213
1238
1266
1296

11.21
12,47
13.88
15.46
17.24
19.23
21.43
23.85

1159
1177
1196
1216
1237
1262
1288

11.73
1300
1443
1603
1783
1982
22.04

1.8

STATIC PRESSURE

2,0

(in. wg)
2.8

STATIC PRESSURE

Bhp
454
555
673
808
963
11.36
13.30
15.46
17.85
20.47
23.33
26.44

(in. wg)

3.0

(in. wg)
3.8

3.6

[0

1.0
Bhp
4.12
5.11
6.26
7.59
9.11
10.83
12.74
14.88
17.24
19.88
22.69
25.79
29.18

2,6

AVAILABLE
3.2

Bhp
3.71
4.67
5.80
7.11
8.60
10.29
12.19
14.31
16.65
19.23
22.06
28.14
28.48

1.6

AVAILABLE
2.2

(Cfm)

EXTERNAL

1.4

AIRFLOW
(Cfm)

Rpm
596
637
68O
725
771
818
867
915
965
1015
1066
1117
1168

0.8

Bhp

1.2

(in. wg)

0.6

Rpm

(Cfm)

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

STATIC PRESSURE

Rpm
55O
595
642
689
738
788
838
888
94O
991
1043
1095
1147

AIRFLOW

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

EXTERNAL

0.4
Bhp
2.90
3.81
4.89
6.15
7.60
9.24
11.10
13.18
15.49
18.03
20.82
23.87
27.18

4,0

Table 9 -- Fan Performance -- 48AJ,AK,A2,A3050
AVAILABLE

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2
Bpm
512
561
611
662
714
766
819
872
925
979
1032
1086
1140

Bhp
2.98
3.90
5.00
6.27
7,74
9.41
11.29
13.40
15.74
18.32
21.15
24.24
27.60

Bpm
560
604
651
699
748
798
848
899
951
1003
1055
1108
1161

0.6
Bbp
3.38
4.33
5.45
6.75
8.24
9.93
11.84
13.96
16.32
18.92
21.77
24.88
28.25

Bpm
604
645
689
734
780
828
877
926
976
1027
1078
1129
1181

EXTERNAL
1.0

0.8
Bhp
3.79
4.77
5.91
7.23
8.75
10.46
12.39
14.54
16.91
19.53
22.40
25.52
28.92

Bpm
647
685
725
768
812
858
905
953
1001
1051
1100
1151
1202

Bhp
4.20
5.20
6.37
7,72
9.26
11.00
12.95
15.11
17,51
20.15
23.04
26,18
29.59

Bpm
688
723
761
801
843
887
932
979
1026
1074
1123
1172
1222

AVAILABLE

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.4

2.2
Bpm
907
930
955
984
1016
1050
1087
1126
1166
1208
1250
1294

2.4
Bhp
7.34
8,46
9.76
11.25
12.93
14,82
16.92
19.23
21.78
24.56
27.59
30.87

Bpm
Bbp
940
7.81
961
8.95
986
10.27
1012
11.77
1043
13.47
1076
15.38
1111
17.49
1149
19.83
1188
22.40
1229
25.20
1271
28.25
..................

2.6
Bpm
971
991
1014
1040
1069
1101
1136
1172
1210
1250
1291

Bhp
8.30
9.46
10.79
12.30
14.02
15.94
18.07
20.43
23.01
25.84
28.91

Bpm
1001
1021
1043
1068
1095
1126
1159
1195
1232
1271
..............

Bhp
4.62
5.65
6.84
8.21
9,77
11.54
13.51
15.70
18.12
20.77
23.68
26.84
30.27

EXTERNAL

2.8

STATIC

PRESSURE
1.2

Bpm
728
760
795
833
873
916
959
1004
1050
1097
1145
1193
1242
STATIC

Bbp
8,79
9.97
11.31
12.84
14.57
16.51
18.66
21.03
23.64
26.48

Bpm
1030
1050
1071
1096
1121
1151
1183
1217
1253
1291

fin. w_!
1.4

Bhp
5.05
6.10
7.31
8.71
10.29
12.08
14,07
16.28
18.72
21.40
24.33
27.51
30.95

Bpm
766
796
829
865
903
944
986
1029
1074
1120
1166
1214
1262

PRESSURE

3.0
Bpm
1059
1078
1098
1121
1147
1175
1206
1239
1275
..........

1.6
Bbp
5.49
6.55
7.79
9.20
10.81
12.62
14.63
16.87
19.33
22.03
24.98
28.18
31.64

Bprn
803
831
861
895
932
971
1012
1054
1097
1142
1188
1234
1281

Bbp
10.29
11.52
12.91
14.49
16.26
18.24
20.44
22.86
25.52

Bpm
1113
1131
1151
1172
1196
1223
1252
1283
......

1.8
Bhp
5.94
7.02
8.27
9,71
11.33
13.16
15.20
17.46
19.94
22.66
25.63
28.85
32.33

Bprn
839
864
893
925
960
998
1037
1078
1121
1164
1209
1255
....

Bhp
10.80
12.05
13.46
15.05
16.83
18,83
21.04
23.48

Bpm
1139
1157
1177
1197
1220
1246
1274
....

2.0
Bhp
6.40
7.49
8,76
10.21
11.86
13.71
15.77
18,05
20.55
23.29
26,28
29.52

Bpm
874
897
925
955
988
1024
1062
1102
1143
1186
1230
1275

Bbp
11.31
12.58
14.01
15.61
17,41
19.42
21.64

Bpm
1164
1183
1202
1222
1244
1269
1296

Bhp
6.86
7.97
9.26
10.73
12.39
14.26
16.34
18.64
21.17
23.93
26.93
30.19

(in. wg)

3.2
Bhp
9.29
10.48
11.84
13.38
15.13
17.08
19.25
21.64
24.26
27.12

Units

3.4
Bhp
9.79
11.00
12.37
13.93
15.69
17,66
19.84
22.25
24.89

Bpm
1086
1105
1125
1147
1172
1199
1229
1261
1296

3.6

3.8

4.0
Bhp
11.83
13.12
14.56
16.18
18.00
20.02
22.25

Table 10 -- Fan Performance -- 48AJ,AK051 Units
AVAILABLE

AIRFLOW
(Cfm)

0.2

Bpm
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

Bhp
2.89
4.33
5.21
6.18
7.28
8,48
9.80
11.25
12.82
14.53
16.37
18,35
20.48
22.75
25.17

419
476
506
536
566
597
626
659
691
723
755
787
819
851
883

Bpm

Bhp

483
534
561
586
617
645
674
7O4
734
764
794
825
856
887
918

3.54
5.04
5.94
6.96
8,09
9.34
10.71
12.21
13.84
15.60
17.49
19.53
21.71
24.04
26.62
AVAILABLE

AIHI=LUW
_,..4)'^'m"

1.2

gpm
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

AIRFLOW
(Cfm)
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

PRESSURE

w_)
0.8

Bhp

538
585
610
636
662
689
717
745
773
802
831
861
890
920
951
EXTERNAL

(in.

Bpm

4.25
5.78
6.70
7.74
8.90
10.17
11.68
13.11
14.77
16.57
18.51
20.59
22.81
25.19
27.72
STATIC

587
632
655
680
704
730
756
783
810
838
866
894
923
952
982

PRESSURE

(in.

Bhp

Bpm

8.26
10.02
11.03
12.15
13.38
14.73
16.21
17.82
19.67
21.45
23.50
25.69
28.03
30.64
33.21

782
819
839
859
881
902
925
948
971
995
1019
1044
1069
1095
1121

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.6

2.4

Bpm
632
674
697
72o
744
766
793
819
845
872
899
927
954
983
lOll

Bhp
9.10
10.92
11.97
13.11
14.35
15.72
17.21
18.84
20.60
22.50
24.55
26.76
29.11
31.63
34.31

Bprn

1.8

Bprn
747
786
806
827
849
871
894
918
942
966
991
1016
1042
1068
1095

1.0
Bhp
5.00
6.56
7.50
8.56
9.73
11.02
12.45
14.00
15.69
17.52
19.49
21.60
23.87
26.28
28.84

Bhp
5.79
7.39
8.34
9.41
10.69
11.90
13.34
14.91
16.62
18.47
20.47
22.61
24.90
27.34
29.94

wg)

1.6
Bhp
7,42
9.12
10.11
11.21
12.43
13.76
15.23
16.82
18.56
20.44
22.47
24.64
26.97
29.46
32.11

711
751
772
793
816
839
862
886
911
936
961
987
1014
1041
1068

2.2

2.0

Bhp

815
851
870
890
911
932
964
977
1000
1023
1047
1071
1096
1121
1147

2.8

9.96
11.85
12.92
14.08
15.35
16.73
18.24
19.88
21.65
23.57
25.63
27.84
30.21
32.74
35.44

3.0

Bpm

Bhp

Bpm

Bhp

Rpm

Bhp

Rpm

Bhp

846
881
900
920
940
961
983
1005
1027
1050
1073
1097
1122
1146
1171

10.82
12.78
13.88
15.06
16.36
17.76
19,28
20.94
22.72
24.65
26.73
28.95
31.33
33.87
36.58

876
911
929
948
968
989
1010
1032
1054
1076
1099
1123
1147
1171
1196

11.69
13.72
14.85
16.06
17.38
16.80
20.34
22.01
23.81
25.76
27.84
30.06
32.47
35.02
37.74

906
939
957
976
996
1016
1036
1058
1060
1102
1124
1147
1171
1195

12.56
14.67
15.82
17.07
18.41
19.86
21.42
23.11
24.92
26.88
28.97
31.22
33.63
36.19

934
967
984
1003
1022
1042
1062
1083
1105
1126
1149
1172
1195

13.44
15.62
16.81
16.08
19.45
20.92
22.51
24.21
26.04
26.01
30.13
32.39
34.60

961
993
1011
1029
1046
1067
1087
1106
1129
1151
1173
1195

Rpm

Bhp
17.68
20.45
21.82
23.26
24.78
26.38
28.09

Bpm
1087
1117
1133
1149
1167
1185

Bhp
14.32
16.58
17.80
19.11
20.50
22.00
23.60
25.33
27.18
29.17
31.29
33.56

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW
(Cfm)
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

gpm

STATIC
0.6

Bpm

1.4
Bhp
6.60
8,24
9.22
10.30
11.50
12.82
14.27
15.85
17.58
19.44
21.46
23.62
25.93
28.40
31.02

673
714
735
758
781
804
829
853
879
905
931
956
985
1012
1040

EXTERNAL

0.4

3.2
Bpm
988
lO19
lO36
lO54
lO73
1092
1112
1132
1153
1174
1196

3.4
Bhp
15.21
17.54
18,80
20.13
21.56
23.06
24.71
26.46
28.33
30.33
32.47

Bpm
lO14
1045
1061
1079
1097
1116
1135
1156
1176
1197

3.6
Bhp
16.09
18.51
19.80
21.17
22.63
24.17
25.83
27.60
29.48
31.60

Bpm
1039
1069
1086
1103
1121
1140
1159
1178
1199

LEGEND

2. Conversion

Bhp -- Brake Horsepower
edb
-- Entering Dry Bulb
ewb -- Entering Wet Bulb
NOTES:
1. Fan performance is based on wet coils, economizer, roof curb, cabinet losses, and clean 2-in.
filters.

Watts

1063
1093
1109
1126
1144
1162
1181

--

3. Variable
unloaded

Bhp
18.77
21.43
22.84
24.31
25.86
27.49

Bhp to watts:

=

Bhp x 746
Motor

1!

4.0

3.8

Bpm

Bhp
16.98
19.48
20.81
22.21
23.70
25.28
26.95
28.74
30.65

air volume
operation

efficiency

units will operate
down
and may be additionally

to 70 cfm/ton.
Performance
at 70 cfm/ton
limited by edb and ewb conditions.

is limited

to

Table 11 -- Fan Performance -- 48AJ,AK,A2,A3060
AIRFLOW
(Cfm)
12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

0.2
Rpm
476
536
566
597
628
659
691
723
755
787
819
851
883
916
948

AIRFLOW
(Cfm)
12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

Bhp
4.33
6.19
7.28
8.48
9.80
11.25
12.82
14.53
16.37
18.35
20.48
22.75
25.17
27.76
30.49

0.4
Rpm
534
588
617
645
674
704
734
764
794
825
856
887
918
950
981

2.2
Rpm
881
920
940
961
983
1005
1027
1050
1073
1097
1122
1146
1171
1197

Bhp
12.78
15.06
16.36
17.76
19.28
20.94
22.72
24.65
26.73
28.95
31.33
33.87
36.58
39.46

Bhp
5.04
6.96
8.09
9.34
10.71
12.21
13.84
15.60
17.49
19.53
21.71
24.04
26.52
29.15
31.95

0.6
Rpm
585
636
662
689
717
745
773
802
831
861
890
920
951
981
1012

Bhp
5.78
7.74
8.90
10.17
11.58
13.11
14.77
16.57
18.51
20.59
22.81
25.19
27.72
30.40
33.24

2.4

2.6

Rpm
Bhp
911
13.72
948
16.06
968
17.38
989
18.80
1010 20.34
1032 22.01
1054 23.81
1076 25.76
1099 27.84
1123 30.08
1147 32.47
1171 35.02
1196 37.74
..................

Rpm
Bhp
939 14.67
976 17.07
996 18.41
1016
19.86
1036
21.42
1058 23.11
1080 24.92
1102 26.88
1124 28.97
1147
31.22
1171
33.63
1195
36.19
................

AVAILABLE
0.8
Rpm
632
680
704
730
756
783
810
838
866
894
923
952
982
1011
1041

Bhp
6.56
8.56
9.73
11.02
12.45
14.00
15.69
17.52
19.49
21.60
23.87
26.28
28.84
31.57
34.46

AVAILABLE
2.8
Rpm
Bhp
967 15.62
1003 18.08
1022 19.45
1042 20.92
1062 22.51
1083 24.21
1105 26.04
1126 28.01
1149 30.13
1172 32.39
1195 34.80
..............

EXTERNAL
1.0
Rpm
674
720
744
768
793
819
845
872
899
927
954
983
1011
1040
1070

4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.2
Rpm
311
347
387
430
452
474
519
565
611
658
681
705

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.4
Bhp
0.54
0.84
1.25
1.77
2.07
2.41
3.19
4.10
5.17
6.39
7.06
7.77

2.2
Rpm
802
822
842
862
872
883
905
931
958
989
1005
1021

Bhp
2.21
2.71
3.29
3.96
4.33
4.73
5.60
6.58
7.70
8.97
9.66
10.39

Rpm
390
417
450
488
507
528
570
613
657
702
725
748

Bhp
0.71
1.02
1.43
1.96
2.27
2.61
3.39
4.31
5.37
6.60
7.27
7.98

Rpm
457
480
507
540
557
576
614
655
697
741
763
785

2.4
Rpm
833
854
874
894
904
914
936
961
987
1016
1032
1048

AVAILABLE
0.8

0.6
Bhp
0.88
1.21
1.63
2.17
2.48
2.82
3.60
4.53
5.60
6.83
7.50
8.21

Rpm
864
885
905
924
934
945
966
990
1015
1043
1058
1074

Bhp
1.05
1.40
1.84
2.38
2.70
3.04
3.83
4.76
5.84
7.07
7.74
8.46

AVAILABLE
2.8

2.6
Bhp
2.38
2.89
3.50
4.19
4.56
4.97
5.85
6.85
7.99
9.26
9.95
10.69

Rpm
515
536
560
588
604
620
656
694
734
776
797
819

Bhp
2.55
3.08
3.70
4.41
4.79
5.21
6.11
7.13
8.27
9.55
10.25
10.99

Rpm
893
914
934
954
964
974
995
1018
1043
1070
1084
1099

Bhp
2.71
3.26
3.90
4.63
5.02
5.45
6.37
7.40
8.55
9.85
10.55
11.29

Bhp
7.39
9.41
10.59
11.90
13.34
14.91
16.62
18.47
20.47
22.61
24.90
27.34
29.94
32.70
35.62

EXTERNAL
3.0

Bhp
8.24
10.30
11.50
12.82
14.27
15.85
17.58
19.44
21.46
23.62
25.93
28.40
31.02
33.81
36.76

Rpm
1019
1054
1073
1092
1112
1132
1153
1174
1196
..........

Bhp
17.54
20.13
21.56
23.08
24.71
26.46
28.33
30.33
32.47

50AJ,AK020,025
EXTERNAL
1.0
Rpm
567
587
609
634
648
663
696
731
769
809
830
850

EXTERNAL
3.0
Rpm
921
943
963
983
993
1003
1023
1046
1070
1096
1110
1124

Rpm
613
633
654
677
690
704
734
767
803
841
861
881

Bhp
1.38
1.78
2.26
2.83
3.16
3.52
4.32
5.26
6.34
7.58
8.26
8.98

Rpm
949
970
991
1010
1020
1030
1051
1073
1096
1121
1135
1149

Bhp
3.06
3.64
4.31
5.07
5.48
5.92
6.88
7.94
9.12
10.44
11.15
11.90

2. Conversion
Watts =
roof curb, cabinet

Bhp
9.12
11.21
12.42
13.76
15.23
16.82
18.56
20.44
22.47
24.64
26.97
29.46
32.11
34.92
37.90

1.6
Rpm
786
827
849
871
894
918
942
966
991
1016
1042
1068
1095
1122
1149

(in. wg)
3.4

Rpm
1045
1079
1097
1116
1135
1156
1176
1197
........

Bhp
18.51
21.17
22.63
24.17
25.83
27.60
29.48
31.50

Bhp
1.55
1.97
2.47
3.06
3.40
3.76
4.57
5.51
6.60
7.85
8.53
9.25

Bhp
3.23
3.82
4.51
5.29
5.71
6.16
7.13
8.21
9.41
10.73
11.45
12.20

Rpm
1093
1126
1144
1162
1181
....
....

Rpm
851
890
911
932
954
977
1000
1023
1047
1071
1096
1121
1147
1172
1199

Bhp
11.85
14.08
15.35
16.73
18.24
19.88
21.65
23.57
25.63
27.84
30.21
32.74
35.44
38.30
41.34

4.0

Bhp
20.45
23.26
24.78
26.38
28.09

Rpm
1117
1149
1167
1185
--

Bhp
21.43
24.31
25.86
27.49
--

Units

1.6

1.8
Bhp
1.71
2.16
2.68
3.29
3.63
4.00
4.82
5.78
6.87
8.12
8.80
9.53

Rpm
733
753
773
793
804
816
840
868
899
932
949
967

Bhp
3.40
4.01
4.71
5.51
5.94
6.39
7.38
8.48
9.69
11.03
11.75
12.51

Rpm
1026
1048
1069
1089
1099
1108
1129
1149
1171
1195
....
....

3.6
Rpm
1001
1023
1043
1063
1073
1083
1103
1124
1147
1171
1183
1197

2.0

Bhp
10.93
13.11
14.36
15.72
17.21
18.84
20.60
22.50
24.55
26.76
29.11
31.63
34.31
37.16
40.18

3.8

Bhp
19.48
22.21
23.70
25.28
26.95
28.74
30.65

Rpm
696
716
735
756
768
780
806
835
868
902
920
939

(in. wg)
3.4

Rpm
975
997
1017
1037
1047
1057
1077
1099
1122
1146
1159
1173

Rpm
819
859
881
902
925
948
971
995
1019
1044
1069
1095
1121
1147
1174

3.6
Rpm
1069
1103
1121
1140
1159
1178
1199
......

(in. wg)
1.4

Rpm
656
676
696
718
730
743
771
802
836
872
891
910

1.8

Bhp
10.02
12.15
13.38
14.73
16.21
17.82
19.57
21.45
23.50
25.69
28.03
30.54
33.21
36.04
39.04

and 50A2,A3020

STATIC PRESSURE
3.2

Bhp
2.88
3.45
4.10
4.85
5.25
5.68
6.62
7.67
8.84
10.14
10.85
11.59

(in. wg)
1.4

Rpm
751
793
816
839
862
886
911
936
961
987
1014
1041
1068
1095
1123

STATIC PRESSURE
1.2

Bhp
1.21
1.59
2.05
2.61
2.93
3.28
4.07
5.00
6.08
7.32
8.00
8.71

LEGEND
Bhp -- Brake Horsepower
edb -- Entering Dry Bulb
ewb -- Entering Wet Bulb
NOTES:
1. Fan performance
is based on wet coils, economizer,
losses, and clean 2-in. filters.

Rpm
714
758
781
804
829
853
879
905
931
958
985
1012
1040
1068
1097

STATIC PRESSURE
3.2

Rpm
Bhp
993 16.58
1029
19.11
1048
20.50
1067
22.00
1087
23.60
1108 25.33
1129 27.18
1151 29.17
1173
31.29
1195
33.56
............

Table 12 -- Fan PerformanceAIRFLOW
(CFM)

STATIC PRESSURE
1.2

Units

2.0
Bhp
1.88
2.34
2.88
3.51
3.87
4.24
5.08
6.04
7.15
8.40
9.08
9.81

Rpm
768
788
808
828
839
850
873
900
929
960
977
994

Bhp
3.58
4.20
4.91
5.72
6.16
6.63
7.64
8.75
9.98
11.33

Rpm
1050
1072
1093
1113
1123
1133
1153
1174
1195
--

3.8

Bhp
2.04
2.52
3.09
3.74
4.10
4.48
5.34
6.31
7.42
8.68
9.37
10.10

4.0
Bhp
3.75
4.39
5.12
5.94
6.39
6.87
7.89
9.02
10.26
--

-- Bhp to watts:
Bhp x 746
Motor efficiency

3. Variable air volume units will operate down to 70 cfm/ton. Performance at
70 cfm/ton is limited to unloaded operation and may be additionally limited
by edb and ewb conditions.

]2

Table 13 -- Fan Performance -- 50AJ,AK027,030
AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

0.2
Rpm
314
352
394
438
483
530
577
625
674
722
771
821

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

0.4

Bhp
0.54
0.85
1.26
1.79
2.44
3.23
4.15
5.22
6.45
7.85
9.41
11.15

2.2
Rpm
803
824
845
866
888
912
938
967
998
1031
1067
1104

Rpm
394
422
456
495
536
579
624
669
715
762
810
857

Bhp
0.72
1.03
1.45
1.98
2.64
3.43
4.36
5.44
6.67
8.07
9.64
11.38

Rpm
460
484
513
546
583
623
665
708
753
798
844
890

2.4

Bhp
2.22
2.72
3.31
3.99
4.77
5.65
6.65
7.78
9.07
10.50
12.10
13.88

Rpm
835
856
877
898
919
942
968
995
1025
1058
1092
1128

AVAILABLE
0.8

0.6
Bhp
0.89
1.22
1.65
2.19
2.85
3.65
4.58
5.67
6.90
8.30
9.88
11.62

Rpm
865
887
908
928
950
972
997
1023
1052
1083
1117
1152

Bhp
2.55
3.09
3.72
4.43
5.25
6.16
7.19
8.35
9.65
11.10
12.71
14.50

Table 14AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.2
Rpm
503
553
605
657
684
710
764
818
872
926
980
1035
1062

AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Bhp
1.96
2.62
3.39
4.29
4.80
5.33
6.52
7.85
9.33
10.98
12.79
14.77
15.83

2.2
Rpm
903
932
961
992
1008
1025
1060
1097
1137
1178
1221
1265
1287

Bhp
4.40
5.27
6.24
7.32
7.90
8.52
9.86
11.35
12.98
14.77
16.73
18.85
19.98

0.4
Rpm
553
599
647
696
721
747
798
849
901
954
1007
1060
1087

Bhp
2.22
2.89
3.68
4.61
5.12
5.66
6.86
8.21
9.71
11.37
13.20
15.19
16.25

0.6
Rpm
601
643
687
733
757
781
830
880
930
981
1033
1085
1111

Bhp
1.05
1.42
1.86
2.41
3.08
3.88
4.82
5.91
7.15
8.55
10.13
11.88

AVAILABLE
2.8

2.6
Bhp
2.38
2.91
3.52
4.21
5.01
5.90
6.92
8.07
9.35
10.80
12.41
14.19

Rpm
517
540
565
594
628
664
703
744
787
831
875
921

Bhp
2.47
3.16
3.97
4.91
5.43
5.99
7.21
8.57
10.09
11.76
13.60
15.61
16.68

2.4

2.6

Rpm
Bhp
933
4.62
962
5.52
990
6.52
1020
7.62
1036
8.21
1052
8.84
1086
10.19
1122
11.69
1161
13.34
1201
15.15
1243
17.11
1286
19.25
..................

Rpm
Bhp
962
4.84
991
5.77
1019
6.79
1048
7.91
1063
8.51
1079
9.15
1112
10.52
1147
12.03
1184
13.69
1223
15.51
1264
17.50
................

Rpm
894
916
937
958
979
1001
1025
1051
1078
1109
1141
1175

Bhp
2.72
3.28
3.92
4.66
5.49
6.42
7.46
8.63
9.94
11.40
13.02
14.81

EXTERNAL
1.0
Rpm
569
590
613
640
670
704
740
779
820
862
905
949

Rpm
923
945
966
986
1007
1029
1052
1077
1104
1133
1165
1198

Fan PerformanceAVAILABLE
0.8
Rpm
646
684
726
769
791
814
861
909
958
1008
1058
1109
1134

Bhp
2.72
3.43
4.26
5.22
5.75
6.31
7.54
8.92
10.45
12.15
14.00
16.03
17.10

AVAILABLE
2.8
Rpm
990
1019
1047
1075
1090
1105
1137
1171
1208
1246
1286

Bhp
5.06
6.02
7.06
8.20
8.82
9.46
10.85
12.37
14.05
15.88
17.88

EXTERNAL
1.0
Rpm
689
724
763
803
825
847
891
938
985
1033
1082
1132
1157

Rpm
615
636
658
682
710
741
776
813
851
892
934
977

Bhp
1.39
1.79
2.28
2.86
3.55
4.37
5.32
6.41
7.67
9.08
10.66
12.42

Bhp
2.97
3.70
4.55
5.52
6.06
6.63
7.88
9.27
10.82
12.53
14.40
16.44
17.52

EXTERNAL
3.0
Rpm
Bhp
1017
5.27
1045
6.26
1073
7.33
1102
8.49
1116
9.12
1131
9.77
1162
11.17
1195
12.72
1231
14.41
1268
16.25
............

Rpm
950
972
993
1014
1035
1056
1079
1103
1130
1158
1188
..........

Bhp
3.06
3.65
4.32
5.10
5.96
6.93
8.00
9.20
10.54
12.01
13.65

(in. wg)
1.4

Rpm
658
678
700
723
749
778
810
845
882
921
962
1004

STATIC PRESSURE
3.2

Bhp
2.89
3.46
4.12
4.88
5.72
6.67
7.73
8.92
10.24
11.71
13.33
15.13

LEGEND
Bhp -- Brake Horsepower
edb -- Entering Dry Bulb
ewb -- Entering Wet Bulb
NOTES:
1. Fan performance
is based on wet coils, economizer,
losses, and clean 2-in. filters.

STATIC PRESSURE
1.2

Bhp
1.22
1.61
2.07
2.64
3.32
4.12
5.06
6.16
7.40
8.81
10.39
12.14

EXTERNAL
3.0

and 50A2,A3025-030

Bhp
3.22
3.97
4.83
5.82
6.37
6.95
8.21
9.62
11.19
12.91
14.79
16.84
17.94

Rpm
1043
1071
1099
1127
1142
1156
1187
1219
1253
1289

Bhp
5.48
6.50
7.59
8.78
9.41
10.08
11.50
13.06
14.76
16.62

2. Conversion
Watts =

1.8
Rpm
734
755
776
798
821
847
876
907
941
977
1015
1055

Bhp
3.41
4.02
4.73
5.53
6.43
7.43
8.54
9.77
11.13

2.0
Bhp
1.88
2.35
2.90
3.54
4.28
5.13
6.11
7.22
8.49
9.92
11.51
13.28

Rpm
769
791
811
833
855
880
907
937
970
1005
1041
1080

Bhp
3.58
4.21
4.93
5.75
6.67
7.69
8.81
10.06

Rpm
1051
1074
1096
1116
1137
1158
1180
--

3.8
Rpm
1027
1049
1071
1092
1113
1134
1155
1178
....

Bhp
2.05
2.54
3.11
3.77
4.52
5.39
6.38
7.50
8.78
10.21
11.81
13.58

4.0
Bhp
3.76
4.40
5.14
5.97
6.90
7.94
9.08
--

Units

Bhp
3.46
4.23
5.12
6.12
6.68
7.26
8.54
9.97
11.55
13.28
15.18
17.25
18.35

1.6
Rpm
804
834
867
901
920
939
978
1020
1063
1108
1153
1200
1224

(in. wg)
3.4

Rpm
1068
1097
1125
1152
1166
1181
1211
1242
1276
........

Bhp
1.72
2.17
2.70
3.32
4.04
4.88
5.84
6.95
8.21
9.63
11.22
12.99

3.6
Rpm
1002
1024
1046
1067
1087
1108
1130
1154
1179
......

(in. wg)
1.4

Rpm
768
799
833
870
889
909
950
993
1037
1083
1130
1178
1202

STATIC PRESSURE
3.2

Rpm
697
718
739
761
786
813
843
877
912
950
989
1030

(in. wg)
3.4

Rpm
Bhp
976
3.24
999
3.83
1020
4.53
1041
5.31
1061
6.20
1083
7.18
1105
8.27
1129
9.49
1154
10.83
1182 12.32
........

STATIC PRESSURE
1.2
Rpm
730
763
798
837
857
878
921
966
1012
1059
1106
1155
1180

1.6

Bhp
1.55
1.98
2.49
3.09
3.80
4.62
5.58
6.68
7.93
9.35
10.94
12.70

50AJ,AKA2,A3035

Units

Bhp
5.69
6.73
7.85
9.07
9.71
10.39
11.82
13.40
15.12

Bhp
3.70
4.50
5.40
6.42
6.98
7.58
8.87
10.31
11.91
13.66
15.57
17.65
18.76

1.8
Rpm
839
868
899
932
950
968
1006
1046
1088
1131
1176
1222
1245

3.6
Rpm
1092
1121
1149
1177
1191
1205
1234
1265
1298

Bhp
5.89
6.96
8.11
9.35
10.01
10.69
12.15
13.74
15.47

Bhp
3.94
4.76
5.68
6.72
7.29
7.89
9.20
10.66
12.27
14.03
15.96
18.05
19.17

2.0
Rpm
872
901
930
962
979
997
1033
1072
1113
1155
1199
1243
1266

3.8
Rpm
1116
1145
1173
1201
1214
1228
1257
1287
....

Bhp
6.09
7.19
8.37
9.63
10.30
10.99
12.47
14.08

Bhp
4.17
5.02
5.96
7.02
7.60
8.21
9.53
11.00
12.63
14.40
16.35
18.46
19.58

4.0
Rpm
1139
1168
1196
1224
1238
1252
1280
--

Bhp
6.28
7.42
8.62
9.91
10.59
11.29
12.79
--

-- Bhp to watts:
Bhp x 746
Motor efficiency

3. Variable air volume units will operate down to 70 cfm/ton. Performance at
70 cfm/ton is limited to unloaded operation and may be additionally limited
by edb and ewb conditions.

roof curb, cabinet

]3

Table 15 -- Fan PerformanceAVAILABLE
AIRFLOW

0.2

(cfm)

Rpm
431
475
521
566
615
663
712
76O
809
859
908
933

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.4
Bhp
199
2.69
3.53
4.52
5.68
7.01
8.53
10.24
12.15
14.27
16.61
17.87

Rpm
464
523
565
606
652
697
743
790
837
865
933
957

Bhp
3.85
4.66
5.63
6.74
8.02
9.47
11.09
12.90
14.91
17.13
19.56
20.86

Rpm
707
730
757
787
819
854
891
929
968
1009
1051
1072

Rpm

Bhp

Rpm

854
87O
889
912
936
967
996
1031
1066
1102
1140
1159

5.93
6.81
7.85
9.05
10.43
11.98
13.72
15.64
17.76
20.08
22.61
23.95

Bhp
2.35
306
394
496
614
749
903
1076
1269
14.83
17.19
18.45

AIRFLOW
Rpm
667
692
721
753
786
824
862
9O2
943
965
1026
1049

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

2.2

(cfm)

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

3.2
Rpm
1009
1022
1036
1053
1073
1096
1121
1149
1179
1211
1245
1262

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Rpm
1037
1050
1064
1080
1099
1121
1145
1172
1201
1232
1265
1282

Table 16AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2

Bhp
edb
ewb

0.4

Rpm
625
653
684
719
755
794
834
875
917
96O
1004
1027

Bhp
5,07
5,92
6,94
8,11
9,46
10.97
12.66
14.54
16,62
18.89
21.38
22.71

Rpm
819
836
857
882
909
939
972
1006
1042
1079
1118
1137

(in. wg)
1.8

Bhp
4.65
5.49
6.49
7.65
8.97
10.47
12.13
13.99
16.04
18.30
20.77
22.09

2.0

Rpm
783
802
825
851
880
912
945
981
1018
1056
1096
1116

STATIC PRESSURE
2,6

Bhp
3.46
4.26
5.20
6.29
7.55
8.97
10.57
12.36
14.35
16.55
18.96
20.25

Bhp
5,49
6,36
7,39
8.58
9.94
11.48
13.19
15.09
17.18
19.48
21.99
23.33

(in. wg)
2.8

3.0

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

6.37
7.26
8.31
9.53
10.92
12.49
14.25
16.19
18.33
20.67
23.22
24.58

919
933
95O
97O
993
1020
1049
1079
1112
1147
1182
1201

6.82
7.73
8.79
10.02
11.42
13.01
14.78
16.75
18.90
21.26
23.84
25.21

95O
964
979
996
1020
1046
1073
1103
1135
1166
1203
1221

726
820
927
10.51
11.93
13.53
15.32
17.30
19.46
21.66
24.45
25.63

98O
993
1008
1026
1047
1071
1098
1126
1157
1190
1224
1242

7.74
8.67
9.75
11.00
12.44
14.05
15.86
17,66
20.06
22,46
25.07
26,46

Bhp
9.65
10.64
11.77
13.06
14.53
16.19
18.06
20.12
22.38
24.86

Rpm
1116
1129
1142
1157
1173
1192
1214
1239
1265
1294

EXTERNAL

Bhp
8.69
9.65
10.75
12.02
13.47
15.11
16.95
18.98
21.21
23.66
26.31
27.71

STATIC PRESSURE
3.6

Rpm
1064
1077
1090
1106
1124
1145
1166
1195
1223
1253
1285

Fan PerformanceAVAILABLE
0.8

0.6

STATIC PRESSURE

Bhp
3.08
3.86
4.78
5.84
7.07
8.47
10.05
11.62
13.79
15.97
18.36
19.64

(in. wg)
3.8

Bhp
9.17
10.14
11.26
12.54
14.00
15.65
17.50
19.55
21.80
24.26
26.93

50AJ,AK,A2,A3040

EXTERNAL
1.0

4.0

Rpm
1091
1104
1117
1131
1149
1169
1191
1217
1244
1274

STATIC PRESSURE
1.2

Bhp
10.14
11.15
12.29
13.59
15.07
16.74
18.62
20.69
22.97
25.46

Units

(in. wg)
1.4

1.6

1.8

2.0

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

475
521
568
615
663
712
760
809
859
908
958
1007
1057

2,69
3.53
4.52
5.68
7.01
8.53
10.24
12.15
14.27
16.61
19.18
21.98
25.02

523
565
608
652
697
743
790
837
885
933
981
1030
1079

3.08
3.94
4.96
6.14
7.49
9.03
10.76
12.69
14.83
17.19
19.77
22.59
25.65

569
606
646
687
730
774
819
864
910
957
1004
1052
1099

3.47
4.36
5.40
6.60
7.98
9.54
11.29
13.24
15.40
17.77
20.37
23.21
26.29

612
646
683
722
762
804
847
891
936
981
1027
1073
1120

3.86
4.78
5.84
7.07
8.47
10.05
11.82
13.79
15.97
18.36
20.98
23.84
26.93

653
684
719
755
794
834
875
917
960
1004
1049
1095
1140

4.26
5.20
6.29
7.55
8.97
10.57
12.36
14.35
16.55
18.96
21.60
24.47
27.58

692
721
753
788
824
862
902
943
985
1028
1071
1116
1161

4.66
5.63
6.74
8.02
9.47
11.09
12.90
14.91
17.13
19.56
22.22
25.10
28.23

730
757
787
819
854
891
929
968
1009
1051
1093
1137
1181

5.07
6.06
7.20
8.50
9.96
11.61
13.45
15.48
17.71
20.16
22.84
25.74
28.89

767
791
819
850
883
918
955
993
1033
1073
1115
1157
......

5.49
6.49
7.65
8.97
10.47
12.13
13.99
16.04
18.30
20.77
23.46
26.39

802
825
851
880
912
945
981
1018
1056
1096
1136
1178

5.92
6.94
8.11
9.46
10.97
12.66
14.54
16.62
18.89
21.38
24.09
27.04

836
857
882
909
939
972
1006
1042
1079
1118
1157
1198

6.36
7.39
8.58
9.94
11.48
13.19
15.09
17.18
19.48
21.99
24.72
27.68

Bhp
965
10.75
12.02
13.47
15.11
16.95
18.98
21.21
23.66
26.31
29.18

Rpm
1077
1090
1106
1124
1145
1168
1195
1223
1253
1285
......

Bhp
10.14
11.26
12.54
14.00
15.65
17.50
19.55
21.80
24.26
26.93

Rpm
1104
1117
1131
1149
1169
1191
1217
1244
1274
....

Bhp
10.64
11.77
13,06
14.53
16.19
18.06
20.12
22.38
24.86

Rpm
1129
1142
1157
1173
1192
1214
1239
1265
1294

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

EXTERNAL

1.0

Rpm
560
612
646
663
722
762
8O4
847
891
936
961
1004

Bhp

3.4
Bhp
8.21
9.16
10.25
11.51
12.95
14.58
16.40
18.42
20.63
23.06
25.69
27.09

0.8

Bhp
2.72
347
436
540
660
796
954
11.29
13.24
15.40
17.77
19.04

Rpm
746
767
791
819
850
863
918
955
993
1033
1073
1094

2,4
867
9O2
92O
941
966
993
1023
1055
1069
1124
1161
1180

(in. wg)

1.6
Bhp
4.24
5.07
6.06
7.20
8.50
9.96
11.61
13.45
15.48
17.71
20.16
21.47

AVAILABLE
AIRFLOW
(Cfm)

EXTERNAL

1.4

AVAILABLE
AIRFLOW

50AJ,AK036 Units
STATIC PRESSURE
0.6

Rpm
534
569
606
646
667
73O
774
819
864
910
957
961

AVAILABLE
1.2

(Cfm)

EXTERNAL

2.2
Rpm
870
889
912
938
967
998
1031
1066
1102
1140
1178
1218

2.4
Bhp
6.81
7.85
9.05
10.43
11.98
13.72
15.64
17.76
20.08
22.61
25.36
28.34

Rpm
902
920
941
966
993
1023
1055
1089
1124
1161
1199
1238

AVAILABLE
2.8

2.6
Bhp
726
8.31
9.53
10.92
12.49
14.25
16.19
18.33
20.67
23.22
25.99
28.99

Rpm
Bhp
933
7.73
950
8.79
970
10.02
993
11.42
1020
13.01
1049
14.78
1079
16.75
1112
18,90
1147
21.26
1182
23.84
1219
26.63
................

Rpm
964
979
998
1020
1046
1073
1103
1135
1168
1203
1240

Bhp
8.20
9.27
10.51
11.93
13.53
15.32
17.30
19.48
21.86
24.45
27.26

EXTERNAL
3.0
Rpm
993
1008
1026
1047
1071
1098
1126
1157
1190
1224
1260

Bhp
867
9.75
11.00
12.44
14.05
15.86
17.86
20.06
22.46
25.07
27.90

LEGEND
-- Brake Horsepower
-- Entering Dry Bulb
-- Entering Wet Bulb

NOTES:
1. Fan performance
2-in. filters.

is based on wet coils

STATIC
Rpm
1022
1036
1053
1073
1096
1121
1149
1179
1211
1245
1279

PRESSURE
3.2
Bhp
9.16
10.25
11.51
12.95
14.58
16.40
18.42
20.63
23.06
25.69
28.54

2. Conversion
Watts =

--

(in. wg)
3.4
Rpm
1050
1064
1080
1099
1121
1145
1172
1201
1232
1265
1299

3.6

3.8

4.0
Bhp
1115
12.29
13.59
15.07
16.74
18.62
20.69
22.97
25.46

Bhp to watts:
Bhp x 746
Motor efficiency

economizer

roof curb, cabinet losses

3. Variable air volume units will operate down to 70 cfm/ton. Performance at 70 cfm/ton is
limited to unloaded operation and may be additionally limited by edb and ewb conditions.

and clean

14

Table 17 -- Fan Performance -- 50AJ,AK041 Units
AVAILABLE
AIRFLOW
(Cfm)

0.2
Rpm
475
521
568
615
663
712
760
809
859
908
958
1007
1057

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Bhp
2.69
3.53
4.52
5.68
7.01
8.53
10.24
12.15
14.27
16.61
19.18
21.98
25.02

Rpm
523
565
6O8
652
697
743
79O
837
865
933
961
1030
1079

1.2
Rpm
692
721
753
786
824
862
9O2
943
985
1026
1071
1116
1161

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Rpm
73O
757
787
819
854
891
929
966
1009
1051
1093
1137
1181

2.2
Rpm
87O
889
912
938
967
998
1031
1066
1102
1140
1178
1218

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Rpm
9O2
92O
941
966
993
1023
1055
1089
1124
1161
1199
1238

3.2
Rpm
1022
1036
1053
1073
1096
1121
1149
1179
1211
1245
1279

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Bhp
9.16
10.25
11.51
12.95
14.58
16.40
18.42
20.63
23.06
25.69
28.54

AIRFLOW
(Cfm)

0.2

EXTERNAL

0.4

EXTERNAL

AVAILABLE
0.8

STATIC PRESSURE

Bhp
5.92
6.94
8.11
9.46
10.97
12.66
14.54
16.62
18,89
21.38
24.09
27.04

Rpm
836
857
862
909
939
972
1006
1042
1079
1118
1157
1198

Bhp
820
927
10.51
11.93
13.53
15.32
17.30
19.46
21.66
24.45
27.26

Rpm
993
1008
1026
1047
1071
1098
1126
1157
1190
1224
1260

Bhp
10.64
11.77
13.06
14.53
16.19
18.06
20.12
22.36
24.86

Rpm
1129
1142
1157
1173
1192
1214
1239
1265
1294

2.0

2.8

STATIC PRESSURE

Bhp
8.67
9.75
11.00
12.44
14.05
15.86
17.86
20.06
22.46
25.07
27.90

(in. wg)
3.8

4,0

Rpm
1104
1117
1131
1149
1169
1191
1217
1244
1274

50AJ,AK,A2,A3050
PRESSURE
1.2

Bhp
6.36
7.39
8.58
9.94
11.48
13.19
15.09
17.18
19.48
21.99
24.72
27.68

3.0

Rpm
964
979
996
1020
1046
1073
1103
1135
1166
1203
1240

Bhp
10.14
11.26
12.54
14.00
15.65
17.50
19.55
21.80
24.26
26.93

STATIC

Bhp
4.26
5.20
6.29
7.55
8.97
10.57
12.36
14.35
16.55
18.96
21.60
24.47
27.58

(in. wg)

Bhp
7.73
8.79
10.02
11.42
13.01
14.78
16.75
18.90
21.26
23.84
26.63

Rpm
1077
1090
1106
1124
1145
1166
1195
1223
1253
1285

EXTERNAL
1.0

Rpm
653
664
719
755
794
834
875
917
96O
1004
1049
1095
1140

1.8
Rpm
8O2
825
851
86O
912
945
961
1018
1056
1096
1136
1178

3.6

Fan Performance-

Bhp
3.66
4.78
5.84
7.07
6.47
10.05
11.62
13.79
15.97
18.36
20.96
23.64
26.93

(in. wg)

Bhp
5.49
6.49
7.65
8.97
10.47
12.13
13.99
16.04
18.30
20.77
23.46
26.39

Rpm
933
95O
97O
993
1020
1049
1079
1112
1147
1182
1219

Bhp
9.65
10.75
12.02
13.47
15.11
16.95
18.98
21.21
23.66
26.31
29.18

0.6

STATIC PRESSURE

1.0

Rpm
612
646
663
722
762
8O4
847
891
936
981
1027
1073
1120

2,6
Bhp
7.26
8.31
9.53
10.92
12.49
14.25
16.19
18.33
20.67
23.22
25.99
28.99

Rpm
1050
1064
1080
1099
1121
1145
1172
1201
1232
1265
1299

0.8

Bhp
3.47
4.36
5.40
6.60
7.96
9.54
11.29
13.24
15.40
17.77
20.37
23.21
26.29

Rpm
767
791
819
85O
863
918
955
993
1033
1073
1115
1157

3.4

Table 18-

Bhp
11.15
12.29
13.59
15.07
16.74
18.62
20.69
22.97
25.46

Units

(in. wg)
1.4

1.6

1.8

2.0

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

485
530
577
625
673
722
771
821
870
920
971
1021
1071

2,76
3.62
4.62
5.80
7.15
8.69
10.43
12.37
14.52
16.89
19.50
22.35
25.43

532
574
617
661
707
753
800
848
896
945
994
1043
1092

315
4.03
5.06
6.26
7.63
9.19
10.95
12.91
15.08
17.48
20.10
22.96
26.07

577
615
655
697
740
784
829
875
922
969
1017
1068
1113

3.54
4.45
5.50
6.73
8.12
9.70
11.48
13.46
15.65
18.06
20.71
23.59
26.71

620
655
692
731
772
814
857
901
947
993
1039
1086
1133

3.94
4.87
5.95
7.20
8.62
10.22
12.01
14.01
16.22
18.65
21.32
24.21
27.36

661
692
727
764
803
843
885
928
971
1016
1061
1107
1154

434
5.29
6.40
7.67
9.11
10.74
12.55
14.57
16.80
19.25
21.93
24.85
28.01

700
729
761
796
833
872
912
953
996
1039
1083
1128
1174

4.74
5.72
6.85
8.14
9.61
11.26
13.10
15.14
17.39
19.86
22.55
25.49
28.66

737
764
794
827
863
900
938
978
1020
1062
1108
1149
1194

516
6.15
7.30
8.62
10.11
11.78
13.64
15.70
17.97
20.46
23.18
26.13
29.33

774
798
827
858
891
927
964
1003
1043
1084
1126
1170
1213

5.58
6.59
7.76
9.10
10.61
12.31
14.19
16.27
18.56
21.07
23.80
26.78
29.99

809
832
858
888
920
954
990
1028
1066
1107
1148
1190
1233

6.01
7.03
8.22
9.58
11.12
12.83
14.74
16.84
19.15
21.68
24.44
27.42
30.65

843
864
889
917
947
980
1015
1052
1089
1129
1169
1210
1252

645
7.49
8.69
10.07
11.62
13.36
15.29
17.41
19.75
22.30
25.07
28.08
31.33

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

876
896
919
945
975
1006
1040
1075
1112
1150
1190
1230
1271

6.90
7.95
9.17
10.56
12,13
13.89
15.84
17.99
20.34
22.91
25.70
28,73
31.99

908
926
948
973
1001
1032
1064
1098
1134
1172
1210
1250
1290

735
8.41
9.64
11.05
12.64
14.42
16.39
18.56
20.93
23.52
26.34
29.38
32.67

939
7.82
956
8.89
977
10.13
1001
11.58
1027
13.16
1057
14.96
1088
16.94
1121
19.13
1156
21.53
1193
24.14
1230
26.97
1269
30.04
................

970
986
1005
1027
1053
1081
1112
1144
1178
1214
1250
1289

8.29
9.37
10.62
12.06
13.68
15.49
17.80
19.71
22.12
24.76
27.61
30.70

974
10.86
12.14
13.61
15.27
17.12
19.18
21.45
23.92
26.61

1082
1096
1112
1130
1152
1176
1203
1231
1262
1295

10.24
11.37
12.66
14.14
15.81
17.68
19.75
22.03
24.52
27.23

1109
1122
1137
1155
1176
1199
1225
1253
1283
....

10.74
11.88
13,18
14.67
16.35
18.23
20.32
22.62
25.13

1134
1148
1162
1179
1199
1221
1246
1274
--

11.25
12.40
13.71
15.21
16.90
18.80
20.90
23.21
--

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Bhp
5.07
6.06
7.20
8.50
9.96
11.61
13.45
15.46
17.71
20.16
22.84
25.74
28.89

2,4
Bhp
6.81
7.85
9.05
10.43
11.98
13.72
15.64
17.76
20.08
22.61
25.36
28.34

(in. wg)

1.6

AVAILABLE

AIRFLOW
(Cfm)

EXTERNAL

1.4
Bhp
4.66
5.63
6.74
8.02
9.47
11.09
12.90
14.91
17.13
19.56
22.22
25.10
28.23

STATIC PRESSURE
0.6

Rpm
569
6O6
646
667
73O
774
819
864
910
957
1004
1052
1099

AVAILABLE

AIRFLOW
(Cfm)

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Bhp
3.06
3.94
4.96
6.14
7.49
9.03
10.76
12.69
14.83
17.19
19.77
22.59
25.65
AVAILABLE

AIRFLOW
(Cfm)

EXTERNAL

0.4

2.2

2.4

AVAILABLE
2.8

2,6

EXTERNAL
3.0
Rpm
999
1014
1032
1054
1078
1108
1138
1166
1199
1234
1270
............

STATIC

PRESSURE
3.2

Bhp

Rpm

Bhp

8,77
9.86
11.12
12.87
14.21
16.03
18.06
20.29
22.72
25.37
28.25

1027
1042
1059
1080
1103
1129
1158
1188
1221
1255
1290

9.25
10.36
11.63
13,09
14.74
16.58
18.62
20.86
23.32
25.99
28.89

[5

(in. wg)
3.4
Rpm
1055
1069
1086
1105
1128
1153
1180
1210
1241
1275
........

3.6

3.8

4.0

Table 19 -- Fan Performance -- 50AJ,AK051 Units
AVAILABLE

AIHI=LUW
(Cfm)

0.2

10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

EXTERNAL

0.4

Rpm

Bhp
2.69
4.03
4.63
5.74
6.75
7,88
9,12
10.46
11.96
13.57
15.30
17,18
19.20
21.35
23.66

397
45O
477
505
533
561
59O
619
648
678
707
737
767
797
827

Rpm
461
509
533
556
584
610
637
664
692
719
748
776
804
833
862

1.2
Rpm

10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

EXTERNAL

1.4

649
666
706
727
748
77O
792
815
838
862
866
911
935
961
966

10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

AIHPLUW

0.8

STATIC

1.0

Bpm
564
6O5
627
649
672
696
72O
744
769
795
621
647
673
9OO
927

PRESSURE

Bpm

Bhp
4.63
6.12
7.01
8.01
9.11
10.32
11.64
13.07
14.64
16.32
18.14
20.09
22.17
24.40
26.78

(in. wg)
2.0

1.8

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

6.06
7.62
8,55
9.59
10.73
11.98
13.35
14.84
16.45
18,19
20.05
22.06
24.19
26.47
28.89

686
723
742
762
782
8O3
825
847
87O
893
917
940
965
989
1014

6,82
8,40
9.35
10.40
11.56
12.84
14.23
15.74
17.37
19.13
21.02
23.05
25.21
27.51
29.95

722
757
776
795
815
836
857
878
900
923
946
969
993
1017
1041

7.60
9.21
10,17
11.24
12,41
13.71
15.12
16.65
18.30
20.08
22.00
24.04
26.23
28.55
31.02

755
790
808
827
846
866
887
908
930
952
974
997
1020
1044
1068

8.40
10.04
11.01
12.09
13.28
14.59
16.02
17.57
19.24
21.04
22.98
25.05
27.25
29.60
32.09

787
821
839
857
876
896
916
937
958
979
1001
1024
1046
1070
1093

Bhp
12.68
14.45
15.48
16.62
17.87
19.25
20.74
22.36
24.11
26.00
28.02
30.18
32.48
34.93
37.52

Bpm
929
960
976
993
1011
1029
1047
1066
1085
1105
1126
1146
1167
1189

Rpm

EXTERNAL

2.4
Bhp
10.06
11.75
12.75
13.85
15.07
16.41
17.86
19.45
21.15
22.99
24.97
27,08
29.32
31.71
34.25

PRESSURE

Bhp
11.80
13.53
14.55
15.68
16.92
18.28
19.77
21.38
23.12
24.99
26.99
29.14
31.42
33.85
36.42

3.0

875
907
924
942
960
978
997
1017
1037
1057
1078
1099
1121
1143
1165

Bpm
902
934
951
968
986
1004
1023
1042
1061
1081
1102
1123
1144
1166
1188

AVAILABLEEXTERNALSTATICPRESSURE(in.w_)
3.6

3.4

Bhp
9.23
10,89
11.87
12,96
14.17
15,49
16.94
18,50
20.19
22,01
23.97
26.06
28,28
30,65
33,17

2.8

Bpm

Bhp
10.92
12.63
13.64
14.76
15.99
17.34
18.81
20.41
22.13
23.98
25.97
28.10
30.37
32.78
35.33

Rpm

(in. wg)

2.6

Rpm
847
880
897
915
933
952
971
991
1011
1032
1053
1075
1097
1119
1142

3.2

STATIC

Bhp
5.33
6.86
7.77
8.79
9.91
11.14
12.49
13.96
15.54
17.25
19.09
21.07
23.18
25.43
27.83

6O8
647
668
689
711
734
757
781
805
829
854
879
9O5
931
957

Bhp

2.2
Rpm
816
851
868
886
905
924
944
964
985
1006
1028
1050
1072
1095
1118

{in. w_l)

1.6

AVAILABLE
AIHI=LUW
U.,i)'^'m"

PRESSURE

Bhp
3.96
5.41
6.27
7.24
8.32
9.50
10.79
12.20
13.74
15.40
17.19
19.11
21.17
23.38
25.72

516
560
582
606
630
655
680
706
732
758
785
812
840
867
895

AVAILABLE
AIHI=LUW
tL.4)'^'m"

STATIC
0.6

Bpm

Bhp
3.31
4.71
5.55
6.49
7.53
8,68
9.95
11.33
12.84
14.47
16.24
18.14
20.18
22.36
24.68

Bhp
13.59
15.38
16.42
17.57
18.83
20.22
21.73
23.36
25.13
27.03
29.06
31.24
33.55
36.02

3.8

4.0

(Cfm)
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

954
985
1001
1018
1035
1053
1071
1090
1109
1126
1148
1169
1190

14.50
16.32
17,38
18,54
19.81
21.21
22.73
24.37
26,15
28.06
30.11
32.30
34.64

979
1010
1026
1042
1059
1077
1095
1113
1132
1151
1171
1191

15,42
17.28
18.35
19,52
20.81
22,21
23.74
25,40
27.19
29,11
31,17
33,38

1003
1033
1049
1066
1082
1100
1117
1136
1154
1173
1193

16.36
18.24
19,32
20,51
21,81
23,22
24,76
26.43
28,24
30.17
32,25

1027
1057
1072
1088
1105
1122
1140
1158
1176
1195

17.30
19,22
20,32
21.52
22,82
24.25
25.80
27.48
29.29
31.24

Table 20 -- Fan Performance -- 50AJ,AK,A2,A3060
AVAILABLE
AIHI=LUW

0.2

0.4

0.6

EXTERNAL

0.8

STATIC

1.0

PRESSURE

Bhp

1050
1079
1095
1111
1127
1144
1161
1179
1197

18,26
20,22
21.32
22,53
23.85
25.29
26.85
28,54
30,36

Units

(in. wg)

1.2

1.4

1.6

1.8

2.0

(Cfm)
12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

AIRFLOW
(Cfm)

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

450
505
533
561
590
619
648
678
707
737
767
797
827
857
888

4.02
5.74
6.75
7.88
9.12
10.48
11.96
13.57
15.30
17.18
19.20
21.35
23.66
26.11
28.72

509
558
584
610
637
664
692
719
748
776
804
833
862
891
920

4.71
6.49
7.53
8.68
9.95
11.33
12.84
14.47
16.24
18.14
20.18
22.36
24.68
27.16
29.79

560
606
630
655
680
706
732
758
785
812
840
867
895
923
952

5.41
7.24
8.32
9.50
10.79
12.20
13.74
15.40
17.19
19,11
21.17
23.38
25.72
28.23
30.88

605
649
672
696
720
744
769
795
821
847
673
900
927
954
982

6.12
8,01
9.11
10.32
11.64
13.07
14.64
16.32
18,14
20.09
22.17
24.40
26,78
29.30
31.97

647
689
711
734
757
781
805
829
854
879
905
931
957
984
1011

6.86
8.79
9,91
11.14
12.49
13.96
15.54
17.25
19.09
21.07
23.18
25.43
27.83
30.38
33.08

686
727
748
770
792
815
838
862
886
911
935
961
986
1012
1038

7.62
9.59
10.73
11.98
13.35
14,84
16.45
18.19
20.05
22.06
24.19
26.47
28.89
31.46
34.19

723
762
782
803
825
847
870
893
917
940
965
989
1014
1040
1065

8.40
10.40
11.56
12.84
14.23
15.74
17.37
19.13
21.02
23.05
25.21
27.51
29.95
32.55
35.29

757
795
815
836
857
878
900
923
946
969
993
1017
1041
1066
1091

9,21
11.24
12.41
13.71
15.12
16.65
18.30
20.08
22.00
24.04
26.23
28,55
31.02
33.64
36.40

790
827
846
866
887
908
930
952
974
997
1020
1044
1068
1092
1117

10.04
12.09
13.28
14.59
16.02
17.57
19.24
21.04
22.98
25.05
27,25
29.60
32.09
34.73
37.52

821
857
876
896
916
937
958
979
1001
1024
1046
1070
1093
1117
1141

10.89
12.96
14.17
15.49
16.94
18.50
20.19
22.01
23.97
26.06
28.28
30.65
33.17
35.83
38.64

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.2

2.4

2.6

2.8

3.0

12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

3.2

3.4

3.6

3.8

4.0
20.22
22.53
23.85
25.29
26.85
28.54
30.36

]_d

Table 21 -- Fan Performance -- 48AW,AY020,025
AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.2
Rpm
339
384
433
484
511
538
593
649
706
763
792
821

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.4
Bhp
0.71
1.10
1.61
2.27
2.66
3.09
4.07
5.23
6.58
8.12
8.97
9.87

Rpm
414
452
494
540
563
588
639
691
744
799
827
855

2.2
Rpm
820
844
869
895
909
925
957
993
1031
1071
1092
1113

Bhp
0.97
1.37
1.89
2.56
2.95
3.38
4.37
5.54
6.89
8.45
9.30
10.20

Rpm
478
510
548
590
612
634
682
731
782
834
860
887

2.4

Bhp
3.68
4.28
4.96
5.74
6.18
6.66
7.72
8.96
10.37
11.97
12.85
13.78

Rpm
852
877
901
926
940
955
986
1021
1058
1097
1118
1139

AVAILABLE
0.8

0.6
Bhp
1.25
1.66
2.19
2.87
3.26
3.70
4.69
5.87
7.23
8.79
9.64
10.55

Rpm
883
907
931
956
970
984
1015
1048
1084
1123
1143
1163

Bhp
1.54
1.96
2.51
3.19
3.59
4.03
5.03
6.21
7.58
9.14
10.00
10.91

AVAILABLE
2.8

2.6
Bhp
3.99
4.63
5.33
6.13
6.57
7.06
8.13
9.38
10.80
12.41
13.29
14.22

Rpm
534
563
597
636
656
678
722
769
817
867
893
918

Bhp
4.30
4.97
5.70
6.52
6.97
7.46
8.55
9.80
11.23
12.85
13.74
14.67

Rpm
Bhp
912
4.62
937
5.31
961
6.07
986
6.91
999
7.37
1013
7.87
1042
8.97
1075
10.23
1110
11.67
1148
13.30
1167
14.19
..............

EXTERNAL
1.0
Rpm
585
611
643
679
698
718
760
805
851
899
924
949

Rpm
940
966
990
1014
1027
1040
1069
1101
1135
1172
1191

STATIC PRESSURE
1.2

Bhp
1.84
2.28
2.84
3.53
3.94
4.38
5.39
6.58
7.95
9.52
10.38
11.29

EXTERNAL
3.0

Rpm
631
656
686
719
737
756
796
839
884
930
954
978

Bhp
2.14
2.60
3.18
3.88
4.29
4.74
5.76
6.95
8.33
9.90
10.77
11.68

Bhp
4.93
5.66
6.44
7.30
7.78
8.28
9.39
10.67
12.12
13.75
14.64

Rpm
967
993
1017
1042
1054
1067
1096
1126
1160
1196
..........

Bhp
5.25
6.01
6.81
7.70
8.18
8.69
9.82
11.11
12.56
14.21

4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

0.2
Rpm
342
389
439
492
546
602
659
717
775
834
893
953

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

Bhp
0.72
1.11
1.64
2.31
3.14
4.13
5.31
6.67
8.23
9.99
11.97
14.17

2.2
Rpm
821
846
872
899
930
963
1000
1039
1080
1123
1168

Bhp
3.69
4.31
5.00
5.79
6.72
7.80
9.06
10.49
12.12
13.95
15.99

0.4
Rpm
417
456
499
546
596
647
701
755
811
867
924
982

Bhp
0.98
1.38
1.92
2.60
3.43
4.43
5.62
6.99
8.56
10.33
12.32
14.53

2.4
Rpm
853
879
903
930
960
992
1028
1066
1106
1148
1192

AVAILABLE
0.8

0.6
Rpm
480
514
553
596
642
690
740
792
845
899
954
1010

Bhp
1.26
1.68
2.22
2.91
3.75
4.76
5.95
7.33
8.90
10.68
12.68
14.90

2.6
Bhp
4.00
4.65
5.36
6.18
7.12
8.22
9.48
10.92
12.56
14.39
16.44

Rpm
Bhp
884
4.31
909
4.99
934
5.73
960
6.57
989
7.53
1020
8.63
1055
9.91
1092
11.36
1131
13.00
1172
14.84
................

Rpm
536
566
602
641
684
730
777
827
878
930
983
1037

Bhp
1.55
1.98
2.54
3.24
4.09
5.10
6.30
7.68
9.27
11.05
13.06
15.28

AVAILABLE
2.8
Rpm
913
939
964
989
1017
1048
1081
1117
1156
1196

Bhp
4.63
5.34
6.10
6.96
7.94
9.06
10.34
11.80
13.45
15.30

EXTERNAL
1.0
Rpm
587
614
647
684
724
768
813
860
909
960
1012
1064

NOTES:
1. Fan performance
is based on wet coils, economizer,
losses, and clean 2-in. filters.

1.6
Rpm
714
738
764
794
810
827
864
904
945
989
1012
1034

(in. wg)
3.4

Rpm
Bhp
993
5.57
1020
6.35
1044
7.19
1068
8.10
1081
8.59
1094
9.11
1121
10.25
1151 11.55
1184 13.02
........

Rpm
633
659
689
724
762
803
847
893
940
989
1039
1091

Bhp
2.15
2.62
3.21
3.93
4.80
5.83
7.04
8.44
10.03
11.83
13.85
16.08

Rpm
676
701
730
762
798
838
880
924
970
1017
1066
1116

Rpm
Bhp
968
5.26
995
6.03
1020
6.85
1045
7.75
1072
8.76
1101
9.91
1133
11.22
1167
12.69
..........

2. Conversion
Watts =

Bhp
2.45
2.95
3.56
4.29
5.17
6.21
7.43
8.83
10.43
12.24
14.26
16.50

Bhp
5.58
6.38
7.22
8.15
9.18
10.34
11.66
13.15

Rpm
751
775
800
829
845
861
896
934
975
1017
1039
1062

3.6
Rpm
1019
1046
1070
1094
1107
1119
1146
1176
......

Rpm
1043
1071
1096
1120
1132
1144
1171
1200

Rpm
787
811
835
863
877
893
927
964
1003
1045
1066
1088

Bhp
6.21
7.05
7.94
8.90
9.41
9.95
11.12
12.45

Rpm
1067
1095
1121
1145
1157
1169
1195
--

Bhp
3.07
3.62
4.27
5.03
5.93
7.00
8.23
9.65
11.26
13.08
15.11
17.36

Rpm
788
813
838
867
898
933
971
1011
1054
1098
1143
1190

Bhp
6.22
7.08
7.98
8.95
10.02
11.21

Rpm
1068
1097
1123
1148
1173
1200

Bhp
3.37
3.94
4.60
5.36
5.79
6.26
7.32
8.54
9.95
11.54
12.42
13.35

4.0
Bhp
6.53
7.40
8.32
9.30
9.82
10.37
11.56
--

Units

Bhp
2.76
3.29
3.91
4.66
5.55
6.60
7.83
9.24
10.84
12.65
14.68
16.93

1.8
Rpm
753
777
804
833
866
903
942
983
1026
1072
1118
1166

3.6
Rpm
1020
1048
1073
1098
1124
1151
1182
......

2.0
Bhp
3.06
3.60
4.23
4.98
5.41
5.87
6.91
8.13
9.53
11.12
11.99
12.92

3.8

Bhp
5.89
6.70
7.57
8.50
9.00
9.53
10.69
12.00

1.6
Rpm
715
740
768
798
833
871
911
954
999
1045
1093
1142

(in. wg)
3.4

Rpm
994
1022
1047
1072
1098
1126
1157
1191

1.8

Bhp
2.75
3.27
3.88
4.61
5.03
5.49
6.52
7.73
9.12
10.71
11.57
12.49

and 48A4,A5025-030

STATIC PRESSURE
3.2

Rpm
Bhp
941
4.95
968
5.68
992
6.48
1018
7.36
1045
8.35
1075
9.48
1107
10.77
1142
12.24
1180
13.90
............

LEGEND
Bhp -- Brake Horsepower
edb -- Entering Dry Bulb
ewb -- Entering Wet Bulb

Bhp
2.44
2.93
3.52
4.24
4.66
5.11
6.13
7.34
8.72
10.30
11.16
12.08

STATIC PRESSURE(in.
wg)
1.2
1.4

Bhp
1.85
2.30
2.87
3.58
4.44
5.46
6.67
8.06
9.64
11.44
13.44
15.68

EXTERNAL
3.0

(in. wg)
1.4

Rpm
674
698
726
757
775
793
831
872
915
960
983
1007

STATIC PRESSURE
3.2

Table 22 -- Fan Performance -- 48AW,AY027,030
AIRFLOW
(CFM)

and 48A4,A5020 Units

Bhp
5.90
6.73
7.60
8.55
9.60
10.78
12.11

2.0

3.8
Rpm
1044
1073
1098
1123
1148
1176
....

Bhp
3.38
3.96
4.63
5.41
6.32
7.40
8.64
10.07
11.69
13.51
15.54
17.80

4.0
Bhp
6.55
7.43
8.36
9.35
10.44
11.65

-- Bhp to watts:
Bhp x 746
Motor efficiency

roof curb, cabinet

3. Variable air volume units will operate down to 70 cfm/ton. Performance at
70 cfm/ton is limited to unloaded operation and may be additionally limited
by edb and ewb conditions.

]7

Table 23 -- Fan Performance -- 48AW,AY,A4,A5035
AVAILABLE

AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.2
Rpm
553
612
672
733
763
794
855
917
980
1042
1105
1168
1200

AIRFLOW
(Of m)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.4
Bhp
2,59
3.45
4.47
5.67
6.33
7.04
8.60
10.36
12.32
14.49
16.88
19.49
20.88

Rpm
602
656
712
769
798
828
887
947
1008
1069
1130
1191
1222

2.2

0.6
Bhp
2.92
3.81
4.86
6.08
6.75
7.47
9.06
10.84
12.82
18.01
17.42
20.06
21.46

Rpm
648
698
750
805
832
861
918
976
1035
1094
1154
1214
1245

2.4

Rpm

Bhp

937
974
1012
1052
1073
1094
1138
1184
1232
1282

5.94
7.08
8.33
9.74
10.80
11.30
13.05
14.99
17.13
19.48

Rpm

EXTERNAL

0.8
Bhp
3.26
4.17
5.24
6.48
7.17
7.90
9.51
11.31
13.31
15.52
17.96
20.61
22.03

Rpm
691
738
787
839
865
892
948
1004
1061
1119
1178
1237
1267

Bhp
361
4.53
5.62
6.88
7.58
8.32
9.95
11.77
13.79
16.03
18.48
21.16
22.58

Rpm
732
776
823
872
897
923
977
1031
1087
1143
1201
1259
1288

AVAILABLE
2.8

2,6
Bhp

Rpm

Bhp

967
6.26
1003
7.43
1041
8.72
1080
10.15
1100
10.92
1120
11.73
1163
13.50
1208
15.45
1255
17.61
..................

995
1031
1068
1106
1126
1146
1188
1232
1278

6.57
7.77
9.10
10.55
11.34
12.16
13.95
15.92
18.09

Rpm

STATIC

1.0

Bhp

1022
6.87
1058
8.12
1094
9.47
1132
10.96
1151
11.78
1171
12.59
1212
14.40
1255
16.39
..............

PRESSURE

(in. wg)

1.2
Bhp
3.95
4.90
6.01
7.28
7.99
8.74
10.39
12.23
14.27
16.53
19.00
21.69
23.13

EXTERNAL
3.0
Rpm

Bhp

1048
1084
1120
1157
1176
1196
1236
1278

7.18
8,46
9.85
11.36
12.17
13.02
14.84
16.85

Rpm
770
812
857
904
929
954
1005
1058
1112
1167
1224
1281
..........
STATIC

1.4
Bhp
4.29
5.27
6.39
7.69
8.40
9.16
10.83
12.69
14.78
17.02
19.51
22.23

Rpm
807
847
890
935
959
983
1033
1084
1137
1191
1246
........

PRESSURE(in.
3.2

Rpm
1073
1109
1148
1182
1201
1220
1259
..........

Units
1.6

Bhp
463
5.63
6.78
8.10
8.82
9.59
11.27
13.14
18.22
17.81
20.02

Rpm
842
881
922
966
989
1012
1060
1110
1161
1214
1268

wg)
3.4

1.8
Bhp
4.96
6.00
7.17
8.51
9.24
10.01
11.71
13.60
15.70
18.01
20.53

Rpm
875
913
953
995
1017
1040
1087
1135
1185
1237
1290

3.6

2.0
Bhp
529
6.36
7.56
8.92
9.66
10.44
12.16
14.06
16.17
18.80
21.04

Rpm
907
944
983
1024
1046
1067
1113
1160
1209
1260
--

3.8

Bhp
5.62
6.72
7.95
9.33
10.08
10.87
12.60
14.52
16.65
18.99
--

4.0

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

7.48
8.79
10.22
11.76
12,89
13.45
15.30

1098
1134
1169
1206
1224
1243
1282

7.78
9.13
10.88
12.16
13.00
13.87
15.74

1122
1158
1193
1229
1248
1266
......

8.07
9.46
10.95
12,55
13,41
14.30

1145
1181
1216
1252
1271
1289

8.36
9.78
11.31
12.95
13.82
14.72

1168
1204
1239
1275
1293
--

8.66
10.11
11.66
13.34
14.22
--

Table 24 -- Fan Performance -- 48AW,AY036 Units
AVAILABLE
AIRFLOW

0.2

(ctm)

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Rpm
475
526
579
633
687
742
797
852
908
964
1021
1049

Bhp
2.29
3.10
4.08
5.24
6.59
8.15
9.92
11.92
14.15
16.63
19.37
20.84

Rpm
527
573
621
671
723
775
827
881
935
989
1044
1072

Bhp
2.66
3.50
4.51
5.70
7.07
8.65
10.45
12.47
14.72
17.23
19.98
21.46

AIRFLOW

AVAILABLE

(Cfm)
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

1.2
Rpm
7O9
740
775
813
854
898
943
99O
1038
1086
1136
1161

EXTERNAL

Bhp
3.05
3.91
4.95
6.16
7.56
9.17
10.98
13.03
15.31
17.83
20.60
22.09
STATIC PRESSURE

(in. wg)
0.8
Rpm
622
66O
701
744
79O
838
887
936
987
1039
1091
1117

Bhp
555
653
769
903
10.56
12.30
14.28
16.43
18,84
21.49
24.39
25.94

Rpm
86O
884
911
941
974
1011
1050
1091
1134
1178
1223
1247

1.8

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

894
917
942
971
1003
1038
1075
1115
1157
1200
1245
1267

6.46
7.48
8.66
10.03
11.60
13.38
18.37
17.89
20.04
22.73
28.67
27.24

927
949
973
1001
1031
1065
1101
1139
1180
1222
1266
1288

6.92
7.96
9.16
10.88
12.13
13.92
18.93
18.17
20.64
23.38
26.32
27.89

958
980
1003
1030
1059
1091
1126
1163
1202
1243
1286

7.38
8.44
9.66
11.06
12.67
14.47
16.80
18.78
21.24
23.97
26.96

988
1010
1033
1058
1086
1117
1150
1186
1228
1268

785
893
10.17
11.59
13.21
16.03
17.07
19.34
21.88
24.60

1017
1039
1061
1086
1112
1142
1178
1210
1247
1286

8,33
9.43
10.69
12.12
13.78
18.89
17.68
19.94
22.46
28.23

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

1046
1067
1089
1113
1139
1167
1199
1232
1269

8.81
9.93
11.21
12.66
14.31
16.16
18.23
20.53
23.07

1073
1094
1116
1139
1164
1192
1222
1255
1290

9.29
10.44
11.73
13.20
14.86
16.73
18.82
21.14
23.69

1099
1121
1142
1165
1189
1216
1246
1277

9.78
10.95
12.26
13.75
15.43
17.31
19.41
21.74

1125
1147
1168
1190
1214
1240
1269
1300

10.27
11.46
12.80
14.30
16.99
17.89
20.00
22.38

1150
1172
1193
1215
1238
1264
1291

10.76
11.98
13.33
14.86
16.86
18.48
20.61

AVAILABLE

AIRFLOW
3.2

STATIC PRESSURE

EXTERNAL

3.4

2.8

STATIC PRESSURE

[8

3.0

(in. wg)
3.8

3.6

See legend on page 17.

Bhp
600
700
817
953
11 08
12.84
14.81
17.01
19.44
22.11
28.03
26.89

(in. wg)

2,6

AVAILABLE

(Cfm)

EXTERNAL

Rpm
825
85O
878
910
945
983
1024
1066
1110
1156
1202
1226

2,0

Rpm

2,4

Bhp
5.11
6.07
7.21
8.53
10.05
11.77
13.70
15.86
18.25
20.88
23.76
28.30

Bhp
384
475
583
709
854
1020
1207
14.15
16.48
19.04
21.86
2336

Rpm
749
778
810
846
885
927
97O
1016
1062
1110
1158
1183

2.2

Rpm
788
814
845
879
916
955
997
1041
1086
1133
1180
1208

Rpm
666
7OO
738
779
823
868
915
963
1013
1063
1114
1139

(in. wg)

1.6
Bhp
4.68
5.62
6.74
8.05
9.54
11.24
13.15
15.29
17.65
20.26
23.12
24.68

1.0
Bhp
344
433
539
662
805
9.68
11.82
13.89
16.89
18.43
21.23
22.73

Bhp
4.25
5.18
6.28
7.57
9.04
10.72
12.61
14.72
17.06
19.68
22.49
24.01

(Cfm)

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

STATIC PRESSURE
0.6

Rpm
576
617
662
7O9
757
8O7
857
9O9
961
1014
1068
1095

1.4

AIRFLOW

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

EXTERNAL

0.4

4,0

Table 25 -- Fan Performance -- 48AW,AY,A4,A5040
AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2
Rpm
526
579
633
687
742
797
852
908
964
1021
1077
1133
1190

Bhp
3.10
4.08
5.24
6.59
8.18
9.92
11.92
14.15
16.63
19.37
22.37
25.65
29.21

Rpm
Bhp
573
350
621
4.51
671
5.70
723
7.07
775
8.65
827
10.45
881
12.47
935
14.72
989
17.23
1044
19.98
1099
23.01
1155
26.30
..................

AVAILABLE
0.8

0.6
Rpm
617
662
709
757
807
857
909
961
1014
1068
1122
1176

Bhp
3.91
4.98
6.16
7.56
9.17
10.98
13.03
15.31
17.83
20.60
23.64
26.96

Rpm
660
701
744
790
838
887
936
987
1039
1091
1144
1197

Bhp
4.33
5.39
6.62
8.05
9.68
11.52
13.59
18.89
18.43
21.23
24.29
27.62

EXTERNAL
1.0
Rpm
700
738
779
823
868
915
963
1013
1063
1114
1168
1217

AVAILABLE

AIRFLOW
(Of m)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.4

2.2
Rpm
917
942
971
1003
1038
1075
1115
1157
1200
1245
1290

2.4
Bhp
7.48
8.66
10.03
11.60
13.38
15.37
17.59
20.04
22.73
28.67
28.88

Rpm
Bhp
949
796
973
9.16
1001
10.55
1031
12.13
1065
13.92
1101
15.93
1139
18.17
1180
20.64
1222
23.35
1266
26.32
..................

2,6
Rpm
980
1003
1030
1059
1091
1126
1163
1202
1243
1286

EXTERNAL

2.8
Bhp
8,44
9.66
11.06
12.67
14.47
16.50
18.75
21.24
23.97
26.96

Rpm
Bhp
1010
8.94
1033
10.17
1058
11.59
1086
13.21
1117
15.03
1150
17.07
1186
19.34
1225
21.85
1265
24.60
..............

Bhp
475
5.83
7.09
8.54
10.20
12.07
14.15
16.48
19.04
21.86
24.94
28.29

STATIC PRESSURE
1.2
Rpm
740
775
813
854
898
943
990
1038
1086
1136
1187
1238

STATIC

3.0
Rpm
1039
1061
1086
1112
1142
1175
1210
1247
1286

Bhp
5.18
6.28
7.87
9.04
10.72
12.61
14.72
17.06
19.65
22.49
25.59
28.96

PRESSURE

(in. wg)
1.4
Rpm
778
810
846
885
927
970
1016
1062
1110
1158
1208
........

Rpm
1067
1089
1113
1139
1167
1199
1232
1269
..........

1.6
Bhp
562
6.74
8.05
9.54
11.24
13.15
15.29
17.65
20.26
23.12
26.25

Rpm
814
848
879
916
955
997
1041
1086
1133
1180
1229

Bhp
10.44
11.73
13.20
14.86
16.73
18.82
21.14
23.69

Rpm
1121
1142
1165
1189
1216
1246
1277
......

3.4
Bhp
9.93
11.21
12.66
14.31
16.16
18.23
20.53
23.07

1.8
Bhp
6.07
7.21
8.53
10.05
11.77
13.70
15.86
18.25
20.88
23.76
26.90

Rpm
850
878
910
945
983
1024
1066
1110
1156
1202
1250

Bhp
10.98
12.26
13.75
15.43
17.31
19.41
21.74

Rpm
1147
1168
1190
1214
1240
1269
1300

2.0
Bhp
6.53
7.69
9.03
10.56
12.30
14.25
16.43
18.84
21.49
24.39
27.56

Rpm
884
911
941
974
1011
1050
1091
1134
1178
1223
1270

Bhp
11.46
12.80
14.30
15.99
17.89
20.00
22.35

Rpm
1172
1193
1215
1238
1264
1291
--

Bhp
700
8.17
9.53
11.08
12.84
14.81
17.01
19.44
22.11
25.03
28.22

(in. wg)

3.2
Bhp
943
10.69
12.12
13.75
15.59
17.65
19.94
22.46
25.23

Units

Rpm
1094
1116
1139
1164
1192
1222
1255
1290

3.6

3.8

4.0
Bhp
11.98
13.33
14.86
16.56
18.48
20.61
--

Table 26 -- Fan Performance -- 48AW,AY041 Units
AVAILABLE

AIRFLOW
(Cfm)

0.2
Rpm

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

1.2
Bhp

740
775
813
854
898
943
990
1038
1086
1136
1187
1238

5.18
6.28
7.57
9.04
10.72
12.61
14.72
17.06
19.65
22.49
25.59
28.96

Rpm
778
810
846
885
927
97O
1016
1062
1110
1158
1208

2.2

2,4

(in. wg)

Rpm
617
662
7O9
757
8O7
857
9O9
961
1014
1068
1122
1176

EXTERNAL

0.8
Bhp
3.91
4.95
6.16
7.56
9.17
10.98
13.03
15.31
17.83
20.60
23.64
26.96

STATIC PRESSURE

Rpm
66O
701
744
79O
838
887
936
987
1039
1091
1144
1197

1.0
Bhp
4.33
5.39
6.62
8.05
9.68
11.52
13.59
15.89
18.43
21.23
24.29
27.62

Rpm
7OO
738
779
823
868
915
963
1013
1063
1114
1165
1217

Bhp
4.75
5.83
7.09
8.54
10.20
12.07
14.15
16.48
19.04
21.86
24.94
28.29

(in. wg)

1.6

1.8

2.0

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

5.62
6.74
8.05
9.54
11.24
13.15
15.29
17.65
20.26
23.12
26.25

814
845
879
916
955
997
1041
1086
1133
1180
1229

6.07
7.21
8.53
10.05
11.77
13.70
15.86
18.25
20.88
23.76
26.90

85O
878
910
945
983
1024
1066
1110
1156
1202
1250

6.53
7.69
9.03
10.56
12.30
14.25
16.43
18.84
21.49
24.39
27.56

884
911
941
974
1011
1050
1091
1134
1178
1223
1270

7.00
8.17
9.53
11.08
12.84
14.81
17.01
19.44
22.11
25.03
28.22

AVAILABLEEXTERNALSTATICPRESSURE(in.
2,6

wg)
2.8

3.0

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

917
942
971
1003
1038
1075
1115
1157
1200
1245
1290

7.48
8.66
10.03
11.60
13.38
15.37
17.59
20.04
22.73
25.67
28.88

949
973
1001
1031
1065
1101
1139
1180
1222
1266

7.96
9.16
10.55
12.13
13.92
15.93
18.17
20.64
23.35
26.32

98O
1003
1030
1059
1091
1126
1163
1202
1243
1286

8.44
9.66
11.06
12.67
14.47
16.50
18.75
21.24
23.97
26.96

1010
1033
1058
1086
1117
1150
1186
1225
1265

894
10.17
11.59
13.21
18.03
17.07
19.34
21.85
24.60

1039
1061
1086
1112
1142
1175
1210
1247
1286

9.43
10.69
12.12
13.75
15.59
17.65
19.94
22.46
25.23

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

1067
1089
1113
1139
1167
1199
1232
1289

9.93
11.21
12.66
14.31
16.16
18.23
20.53
23.07

1094
1116
1139
1164
1192
1222
1255
1290

10.44
11.73
13.20
14.86
16.73
18.82
21.14
23.69

1121
1142
1165
1189
1216
1246
1277

10.95
12.26
13.75
15.43
17.31
19.41
21.74

1147
1168
1190
1214
1240
1269
1300

11.46
12.80
14.30
18.99
17.89
20.00
22.35

1172
1193
1215
1238
1264
1291

11.98
13.33
14.86
16.56
18.48
20.61

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Bhp
3.50
4.51
5.70
7.07
8.65
10.45
12.47
14.72
17.23
19.98
23.01
26.30

1.4

Rpm

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Rpm
573
621
671
723
775
827
881
935
989
1044
1099
1155

STATIC PRESSURE
0.6

AVAILABLE

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Bhp
3.10
4.08
5.24
6.59
8.15
9.92
11.92
14.15
16.63
19.37
22.37
25.65
29.21

526
579
833
887
742
797
852
908
964
1021
1077
1133
1190

EXTERNAL

0.4

3.2

3.4

AVAILABLEEXTERNALSTATICPRESSURE(in.
3.6

See legend on page 17.

[9

wg)
3.8

4.0

Table 27 -- Fan Performance -- 48AW,AY,A4,A5050
AVAILABLE

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2
Bpm
536
588
642
696
751
807
863
919
975
1032
1089
1146
1203

Bhp
3.18
4.17
5.35
6.72
8.29
10.09
12.12
14.38
16.90
19.67
22.71
26.04
29.65

Bpm
582
630
680
732
784
837
891
946
1000
1056
1111
1167
1224

0.6
Bhp
3.58
4.60
5.80
7.20
8.80
10.62
12.67
14.96
17.49
20.29
23.35
26.69
30.32

Bpm
626
670
717
766
816
867
919
972
1025
1079
1134
1188
1244

2.2
Bpm
923
949
078
1010
1046
1084
1124
1166
1210
1255

2.4
Bhp
7.57
8.77
10.15
11.74
13.53
15.55
17.79
20.27
23.00
25.99

Bpm
955
980
1008
1038
1072
1109
1148
1189
1231
1276

Bhp
3.99
5.04
6.27
7.69
9.32
11.16
13.23
15.54
18.00
20.91
23.99
27.35
31.00

Bpm
668
709
753
799
847
896
946
997
1049
1102
1155
1209
1263

2.6
Bhp
8.05
9.27
10.67
12.27
14.08
16.11
18.38
20.88
23.62
26.63

Bpm
986
1010
1036
1066
1098
1134
1171
1211
1253
1296

EXTERNAL

0.8
Bhp
4.41
5.48
6.73
8.18
9.83
11.70
13.79
16.12
18.70
21.54
24.64
28.02
31.69

2.8
Bhp
8.54
9.77
11.19
12.81
14.63
16.68
18.97
21.49
24.25
27.27

Bpm
1016
1039
1064
1093
1124
1158
1195
1234
1274
..............

STATIC

PRESSURE

1.0

AVAILABLE

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.4

Bhp
9.03
10.28
11.72
13.35
15.19
17.26
19.55
22.09
24.88

Bpm
708
746
787
831
877
924
973
1023
1073
1125
1177
1230
1283

EXTERNAL
3.0
Bpm
1045
1067
1092
1119
1149
1182
1218
1256
1295

(in. wg)

1.2
Bhp
4.83
5.93
7.20
8.67
10.35
12.24
14.36
16.71
19.31
22.17
25.29
28.69
32.38

Bpm
747
782
821
863
906
952
999
1047
1097
1147
1198
1250
..........
STATIC

Bhp
9.53
10.80
12.25
13.90
15.76
17.84
20.15
22.71
25.51

1.4
Bhp
5.27
6.38
7.68
9.17
10.87
12.78
14.92
17.30
19.92
22.80
25.95
29.37

PRESSURE/in.
3.2

Bpm
1073
1095
1119
1145
1174
1206
1241
1277
..........

Units

Bhp
10.03
11.32
12.79
14.45
16.32
18.42
20.75
23.32

Bpm
785
818
854
893
935
979
1025
1072
1120
1169
1219
1270

1.6
Bhp
5.71
6.84
8.16
9.68
11.40
13.33
15.49
17.89
20.53
23.44
26.60
30.04

Bpm
821
852
886
923
964
1006
1050
1096
1143
1191
1240
1290

Bhp
10.54
11.85
13.33
15.01
16.90
19.01
21.35
23.94

Bpm
1126
1148
1171
1196
1223
1253
1285
......

1.8
Bhp
6,16
7.31
8.65
10.18
11.92
13.88
16.06
18.48
21.15
24.07
27.26
30.72

Bpm
857
885
917
953
991
1032
1075
1120
1165
1213
1261
....

Bhp
11.05
12.38
13.88
15.57
17.48
19.60
21.96

Bpm
1152
1174
1196
1220
1247
1276
....

2.0
Bhp
6.63
7.79
9.14
10.70
12.46
14.43
16.64
19.08
21.76
24.71
27.92

Bpm
891
918
948
982
1019
1058
1100
1143
1188
1234
1281

Bhp
11.56
12.91
14.43
16.14
18.06
20.20

Bpm
1177
1199
1221
1245
1270
1299

Bhp
7.09
8.28
9.65
11.21
12.99
14.99
17.21
19.68
22.38
25.35
28.58

w_!
3.4
Bpm
1100
1122
1145
1171
1199
1230
1263
1299

3.6

3.8

4.0
Bhp
12.08
13.45
14.99
16.72
18.65
20.80

Table 28 -- Fan Performance -- 48AW,AY051 Units
AIRFLOW
(Cfm)

0.2
Rpm

10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

45O
516
550
584
619
654
689
725
76O
796
832
869
905
942
976

Bhp

Rpm

Bhp

Rpm

Bhp

3.19
4.81
5.80
6.90
8.13
9.49
10.99
12.64
14.43
16.37
18.47
20.74
23.17
25.76
28.56

5O9
569
600
632
664
697
730
764
798
833
867
902
937
973
1008

3.86
5.54
6.56
7.69
8.96
10,36
11,90
18.56
15,41
17.39
19,54
21,84
24.31
26.95
29,77

561
617
646
676
706
737
769
801
834
867
901
934
968
1003
1037

4.58
6.30
7.34
8.50
9.79
11.22
12.79
14.51
16.37
18.39
20.56
22.90
25.40
28.08
30.93

608
660
688
716
745
775
806
837
868
900
932
965
998
1032
1065

5,34
7.10
8.15
9,33
10.65
12,10
13.69
15,43
17.32
19,37
21,57
23.94
26.48
29.18
32,07

651
701
727
754
782
811
84O
87O
900
931
963
995
1027
1059
1092

Bhp
9.53
11.52
12.67
13.94
15.33
16.86
18.54
20.36
22.34
24.48
26.78
29.26
31.90
34.72
37.72

Bpm
829
872
894
917
941
966
992
1016
1045
1072
1100
1129
1157
1187

Bhp
14.02
16.34
17.62
19.01
20.51
22.14
23.89
25.79
27.84
30.05
32.42

Bpm
973
lOll
lO31
lO52
lO74
lO97
112o
1144
1169
1194

Bhp
18.66
21.35
22.80
24.33
25.97
27.71

Bpm
lO96
1131
115o
117o
1191

1.4
Bhp
6.96
8.79
9.88
11.10
12.44
13.93
15.56
17.34
19.27
21.36
23.61
26.03
28.62
31.38
34.32

691
789
764
790
817
845
873
902
982
962
992
1023
1055
1086
1119

Rpm

Bhp
6,14
7.93
9,00
10.20
11.53
13.00
14.61
16.38
18.29
20.36
22.59
24.98
27.55
30.28
33.20

Bpm
728
774
799
824
850
877
904
933
961
991
1020
1051
1081
1113
1144

1.8

1.6
Bhp
7.80
9.68
10.79
12.02
13.38
14.88
16.53
18.32
20.27
22.38
24.65
27.09
29.70
32.48
35.44

Bpm

Bpm

Bhp
8.66
10.59
11.72
12.97
14.35
15.86
17.52
19.33
21.29
23.42
25.71
28.17
30.79
33.59
36.58

764
808
832
857
882
908
935
962
990
1019
1048
1077
1107
1138
1169

797
841
864
888
912
938
964
990
1018
1046
1074
1103
1133
1163
1193

2.0
Bhp
10.42
12.46
13.64
14.92
16.34
17.88
19.58
21.41
23.40
25.56
27.87
30.36
33.02
35.86

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW
(Cfm)

2.2
Bpm
86o
9Ol
923
946
970
994
lO19
1045
1071
1098
1125
1153
1181

2.4
Bhp
11.31
13.42
14.62
15.92
17.36
18.93
20.63
22.48
24.49
26.66
28.99
31.49
34.16

Bpm
89o
930
952
974
997
lO21
1045
1070
1096
1123
1150
1177

3.2

Bpm
998
1036
1056
1077
1099
1121
1144
1167
1192

Bpm

EXTERNAL

Bpm
1024
1061
1081
1101
1122
1144
1167
1190

Bhp
16.79
19.33
20.71
22.18
23.76
25.45
27.27
29.23

Bpm
1048
1085
1104
1125
1146
1167
1190

20

Bpm

Bhp
13.11
15.36
16.61
17.97
19.45
21.65
22,79
24.67
26.71
28.90
31.26

918
958
979
1001
1024
1047
1071
1096
1121
1147
1173

3.4
Bhp
15.86
18.33
19.67
21.12
22.67
24.34
26.13
28.07
30.16

2.8

2.6
Bhp
12.21
14.38
15.61
16.94
18.40
19.98
21.70
23.57
25.59
27.77
30.12
32.63

AVAILABLE

AIRFLOW
(Cfm)
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

1.0

Rpm

1.2

Bpm

10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

0.8

Bhp

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW
(Cfm)
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.6

0.4

STATIC
3.6

PRESSURE

946
985
1006
1027
1049
1072
1096
1120
1145
1171
1197

3.0

(in. w_)
3.8

Bhp
17.72
20.34
21.75
23.25
24.86
26.58
28.42

Bhp
14.94
17.33
18.64
20.06
21.58
23.23
25.01
26.93
28.99
31.21

Bpm
1072
1108
1128
1148
1168
1190

4.0
Bhp
19.60
22.36
23.85
25.42
27.08

Table 29 -- Fan Performance -- 48AW,AY,A4,A5060
AIRFLOW
(Cfm)
12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

0.2
Rpm
516
584
619
654
689
725
760
796
832
869
905
942
978
1015
1052

AIRFLOW
(Cfm)
12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

Bhp
4.81
6.90
8.13
9.49
10.99
12.64
14.43
16.37
18.47
20.74
23.17
25.78
28.56
31.52
34.66

0.4
Rpm
569
632
664
697
730
764
798
833
867
902
937
973
1008
1044
1080

2.2
Rpm
901
946
970
994
1019
1045
1071
1098
1125
1153
1181

Bhp
13.42
15.92
17.36
18.93
20.63
22.48
24.49
26.66
28.99
31.49
34.16

Bhp
5.54
7.69
8.96
10.36
11.90
13.58
15.41
17.39
19.54
21.84
24.31
26.95
29.77
32.76
35.94

0.6
Rpm
617
676
706
737
769
801
834
867
901
934
968
1003
1037
1072
1107

Bhp
6.30
8.50
9.79
11.22
12.79
14.51
16.37
18.39
20.56
22.90
25.40
28.08
30.93
33.96
37.18

2.4

2.6

Rpm
Bhp
930
14.38
974
16.94
997
18.40
1021
19.98
1045 21.70
1070 23.57
1096 25.59
1123 27.77
1150 30.12
1177 32.63
..................

Rpm
Bhp
958 15.36
1001
17.97
1024
19.45
1047
21.05
1071 22.79
1096 24.67
1121 26.71
1147 28.90
1173
31.26
................

AVAILABLE
0.8
Rpm
660
716
745
775
806
837
868
900
932
965
998
1032
1065
1099
1133

Bhp
7.10
9.33
10.65
12.10
13.69
15.43
17.32
19.37
21.57
23.94
26.48
29.18
32.07
35.13
38.38

AVAILABLE
2.8
Rpm
985
1027
1049
1072
1096
1120
1145
1171
1197

Bhp
16.34
19.01
20.51
22.14
23.89
25.79
27.84
30.05
32.42

EXTERNAL
1.0
Rpm
701
754
782
811
840
870
900
931
963
995
1027
1059
1092
1125
1159

STATIC PRESSURE
1.2

Bhp
7.93
10.20
11.53
13.00
14.61
16.38
18.29
20.36
22.59
24.98
27.55
30.28
33.20
36.29
39.57

EXTERNAL
3.0

Rpm
739
790
817
845
873
902
932
962
992
1023
1055
1086
1119
1151
1184

Bhp
8.79
11.10
12.44
13.93
15.56
17.34
19.27
21.36
23.61
26.03
28.62
31.38
34.32
37.44
40.75

Rpm
Bhp
1011
17.33
1052
20.06
1074
21.58
1097
23.23
1120
25.01
1144
26.93
1169
28.99
1194
31.21
............

Rpm
1036
1077
1099
1121
1144
1167
1192
..........

Bhp
18.33
21.12
22.67
24.34
26.13
28.07
30.16

Table 30 -- Fan Performance -- 50AW,AY020,025
AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000

0.2
Rpm
322
361
405
451
475
500
550
601
653
706
732
759

AIRFLOW
(CFM)

0.4
Bhp
0.62
0.95
1.41
2.00
2.34
2.72
3.60
4.63
5.83
7.20
7.96
8.76

2.2
Rpm
808
829
849
871
883
896
924
954
987
1022
1039
1058

Bhp
2.84
3.39
4.02
4.74
5.14
5.58
6.54
7.64
8.89
10.31
11.08
11.90

4,000
5,000
6,000
7,000
7,500
8,000
9,000
10,000
11,000
12,000
12,500
13,000
LEGEND
Bhp -- Brake Horsepower
edb -- Entering Dry Bulb
ewb -- Entering Wet Bulb

Rpm
399
431
467
508
529
551
596
644
692
742
768
793

Bhp
0.82
1.17
1.64
2.22
2.57
2.95
3.83
4.86
6.07
7.45
8.20
9.01

Rpm
464
491
524
559
579
598
640
684
730
777
801
826

2.4
Rpm
840
861
881
903
915
927
954
983
1015
1048
1066
1084

AVAILABLE
0.8

0.6
Bhp
1.04
1.41
1.88
2.48
2.82
3.21
4.09
5.12
6.33
7.71
8.47
9.27

Rpm
870
892
912
933
945
957
983
1011
1042
1075
1092
1109

Bhp
1.26
1.65
2.14
2.75
3.10
3.48
4.36
5.40
6.61
7.99
8.75
9.56

AVAILABLE
2.8

2.6
Bhp
3.06
3.64
4.29
5.03
5.44
5.89
6.86
7.98
9.24
10.67
11.44
12.26

Rpm
521
545
574
607
625
643
682
723
766
811
834
857

Bhp
3.29
3.89
4.57
5.33
5.75
6.20
7.19
8.31
9.59
11.03
11.81
12.63

NOTES:
1. Fan performance
is based on wet coils, economizer,
losses, and clean 2-in. filters.

Rpm
900
922
942
963
974
985
1011
1038
1068
1100
1117
1134

Bhp
3.52
4.14
4.84
5.62
6.05
6.51
7.51
8.65
9.94
11.39
12.17
13.00

EXTERNAL
1.0
Rpm
572
594
621
651
668
685
721
760
801
844
866
888

EXTERNAL
3.0
Rpm
928
950
971
991
1002
1014
1038
1065
1094
1125
1141
1158

Rpm
619
640
664
693
708
724
759
796
835
875
897
918

Bhp
1.71
2.14
2.67
3.30
3.66
4.06
4.96
6.01
7.22
8.61
9.37
10.17

Rpm
955
978
999
1019
1030
1041
1064
1091
1119
1150
1165
1182

Bhp
3.98
4.65
5.39
6.21
6.66
7.13
8.17
9.34
10.65
12.12
12.91
13.75

2. Conversion
Watts =

1.6
Rpm
808
857
882
908
935
962
990
1019
1048
1077
1107
1138
1169
......

Bhp
19.33
22.18
23.76
25.45
27.27
29.23

Bhp
10.59
12.97
14.35
15.86
17.52
19.33
21.29
23.42
25.71
28.17
30.79
33.59
36.58

1.8
Rpm
841
888
912
938
964
990
1018
1046
1074
1103
1133
1163
1193

Bhp
11.52
13.94
15.33
16.86
18.54
20.36
22.34
24.48
26.78
29.26
31.90
34.72
37.72

3.6
Rpm
1085
1125
1146
1167
1190
......

Bhp
20.34
23.25
24.86
26.58
28.42

2.0
Rpm
872
917
941
966
992
1018
1045
1072
1100
1129
1157
1187
--

3.8
Rpm
1108
1148
1168
1190
....

Bhp
21.35
24.33
25.97
27.71

Bhp
12.46
14.92
16.34
17.88
19.58
21.41
23.40
25.56
27.87
30.36
33.02
35.86
--

4.0
Rpm
1131
1170
1191
--

Bhp
22.36
25.42
27.08
--

and 50A4,A5020 Units
(in. wg)
1.4

Rpm
662
682
705
732
746
762
795
830
867
906
927
947

STATIC PRESSURE
3.2

Bhp
3.75
4.40
5.12
5.92
6.35
6.82
7.84
8.99
10.29
11.75
12.54
13.37

Bhp
9.68
12.02
13.38
14.88
16.53
18.32
20.27
22.38
24.65
27.09
29.70
32.48
35.44
38.59

(in. wg)
3.4

Rpm
1061
1101
1122
1144
1167
1190
........

STATIC PRESSURE
1.2

Bhp
1.48
1.89
2.40
3.02
3.38
3.77
4.66
5.70
6.91
8.29
9.05
9.86

(in. wg)
1.4

Rpm
774
824
850
877
904
933
961
991
1020
1051
1081
1113
1144
1176
........

STATIC PRESSURE
3.2

Units

Bhp
1.93
2.39
2.93
3.58
3.96
4.36
5.27
6.33
7.54
8.93
9.69
10.50

1.6
Rpm
702
722
744
769
783
797
829
863
899
936
956
976

(in. wg)
3.4

Rpm
Bhp
981
4.21
1005
4.90
1026
5.67
1046
6.51
1057
6.96
1067
7.45
1090
8.50
1116
9.68
1144
11.01
1173 12.48
1189 13.28
........

Bhp
2.16
2.64
3.20
3.87
4.25
4.66
5.58
6.65
7.87
9.27
10.03
10.84

1.8
Rpm
739
759
780
804
818
832
862
894
929
966
985
1004

3.6
Rpm
1007
1031
1052
1072
1083
1093
1116
1141
1168
1197
......

Bhp
4.44
5.16
5.94
6.80
7.27
7.76
8.83
10.02
11.36
12.85

2.0
Bhp
2.38
2.89
3.47
4.16
4.55
4.96
5.90
6.98
8.21
9.61
10.38
11.19

Rpm
774
795
816
839
851
864
893
925
958
994
1012
1031

Bhp
4.67
5.41
6.22
7.10
7.58
8.08
9.16
10.37
11.72

Rpm
1055
1080
1102
1123
1133
1143
1165
1189
--

3.8
Rpm
1031
1056
1077
1098
1108
1118
1141
1165
1191
....

Bhp
2.61
3.14
3.75
4.45
4.84
5.27
6.22
7.31
8.55
9.96
10.73
11.54

4.0
Bhp
4.91
5.67
6.49
7.40
7.88
8.39
9.49
10.72
--

-- Bhp to watts:
Bhp x 746
Motor efficiency

roof curb, cabinet

3. Variable air volume units will operate down to 70 cfm/ton. Performance at
70 cfm/ton is limited to unloaded operation and may be additionally limited
by edb and ewb conditions.

2!

Table 31 -- Fan Performance -- 50AW,AY027,030

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

0.2
Rpm
325
366
411
459
508
560
612
665
718
772
826
881

AIRFLOW
(CFM)
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000

0.4

Bhp
0.62
0.97
1.43
2.02
2.76
3.64
4.68
5.89
7.28
8.85
10.61
12.57

2.2
Rpm
809
831
852
875
901
930
961
995
1030
1068
1107
1147

Rpm
402
435
473
515
559
605
654
703
754
806
858
910

Bhp
0.83
1.19
1.66
2.25
2.99
3.88
4.92
6.14
7.53
9.11
10.87
12.84

Rpm
466
495
529
566
606
649
694
740
788
838
888
939

2.4

Bhp
2.84
3.41
4.05
4.78
5.63
6.60
7.72
8.99
10.43
12.04
13.83
15.82

Rpm
841
863
884
907
932
960
990
1022
1057
1093
1131
1171

AVAILABLE
0.8

0.6
Bhp
1.05
1.42
1.91
2.51
3.25
4.14
5.19
6.41
7.80
9.38
11.15
13.12

Rpm
872
894
915
937
961
988
1018
1049
1083
1119
1156
1194

Bhp
1.27
1.67
2.16
2.78
3.53
4.42
5.47
6.69
8.09
9.67
11.44
13.41

AVAILABLE
2.8

2.6
Bhp
3.07
3.66
4.32
5.07
5.94
6.93
8.06
9.34
10.78
12.40
14.20
16.19

Rpm
523
548
579
613
650
690
732
776
822
869
917
967

Bhp
3.30
3.91
4.59
5.37
6.25
7.25
8.40
9.69
11.14
12.77
14.58
16.58

Rpm
Bhp
901
3.53
924
4.16
945
4.87
967
5.66
990
6.56
1016
7.58
1045
8.74
1075
10.04
1108
11.51
1143
13.14
1179
14.96
..............

EXTERNAL
1.0
Rpm
574
597
625
657
691
729
769
811
854
899
946
994

STATIC PRESSURE
1.2

Bhp
1.49
1.91
2.43
3.06
3.82
4.72
5.77
7.00
8.39
9.98
11.75
13.72

EXTERNAL
3.0

and 50A4,A5025-030

Rpm
620
642
668
698
731
766
804
844
886
929
974
1021

Bhp
1.72
2.16
2.69
3.34
4.11
5.02
6.09
7.31
8.71
10.30
12.07
14.05

(in. wg)
1.4

Rpm
663
685
709
737
768
802
838
876
916
958
1002
1047

Rpm
956
980
1001
1023
1045
1070
1097
1126
1157
1191

Bhp
3.99
4.67
5.42
6.25
7.18
8.23
9.42
10.75
12.24
13.89

7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

0.2
Rpm
522
576
630
686
714
742
799
856
914
971
1029
1088
1117

AIRFLOW
(Cfm)
7,000
8,000
9,000
10,000
10,500
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Bhp
2.06
2.75
3.57
4.52
5.05
5.62
6.88
8.29
9.87
11.62
13.55
15.66
16.79

0.4
Rpm
573
622
672
724
750
777
831
886
942
998
1054
1111
1140

2.2
Rpm
912
944
978
1014
1033
1052
1091
1133
1176
1220
1265

Bhp
4.46
5.37
6.40
7.55
8.17
8.83
10.26
11.83
13.56
15.45
17.52

Bhp
2.32
3.03
3.86
4.84
5.38
5.95
7.22
8.65
10.24
12.00
13.94
16.07
17.20

0.6
Rpm
620
665
712
761
786
811
863
916
969
1024
1079
1134
1162

2.4
Rpm
942
973
1006
1041
1059
1078
1117
1157
1199
1243
1287

Bhp
4.68
5.62
6.67
7.84
8.47
9.14
10.58
12.17
13.92
15.83
17.91

Bhp
2.57
3.30
4.16
5.15
5.70
6.28
7.57
9.01
10.61
12.39
14.34
16.47
17.61

2.6
Rpm
970
1001
1034
1068
1086
1104
1142
1181
1222
1265

Bhp
4.90
5.86
6.93
8.12
8.77
9.44
10.90
12.51
14.28
16.20

AVAILABLE
0.8
Rpm
664
706
750
797
821
845
894
945
997
1050
1103
1157
1184

Bhp
2.82
3.57
4.45
5.46
6.02
6.61
7.91
9.37
10.98
12.77
14.74
16.88
18.02

AVAILABLE
2.8
Rpm
998
1029
1060
1094
1111
1129
1166
1205
1245
1287

Bhp
5.12
6.11
7.20
8.41
9.06
9.75
11.23
12.85
14.63
16.58

EXTERNAL
1.0
Rpm
705
745
787
831
854
877
925
974
1024
1075
1127
1180
1207

Bhp
3.06
3.84
4.74
5.77
6.34
6.94
8.25
9.72
11.36
13.16
15.13
17.29
18.44

EXTERNAL
3.0
Rpm
Bhp
1025
5.33
1055
6.35
1086
7.46
1119
8.69
1136
9.35
1154
10.05
1190
11.54
1228
13.19
1268
14.99
............

LEGEND
Bhp -- Brake Horsepower
edb -- Entering Dry Bulb
ewb -- Entering Wet Bulb
NOTES:
1. Fan performance
is based on wet coils, economizer,
losses, and clean 2-in. filters.

Rpm
703
724
747
774
803
835
870
907
946
987
1029
1073

Rpm
1008
1032
1054
1076
1097
1121
1147
1175
......

Bhp
3.30
4.10
5.02
6.07
6.65
7.26
8.60
10.08
11.73
13.54
15.53
17.70
18.86

Rpm
780
817
855
896
917
939
983
1029
1076
1125
1174
1225
1250

STATIC PRESSURE
3.2
Rpm
1051
1081
1112
1144
1161
1178
1213
1251
1290

Bhp
5.54
6.58
7.72
8.97
9.64
10.35
11.86
13.52
15.34

2. Conversion
Watts =

1.8
Rpm
740
762
784
809
837
868
902
937
975
1014
1055
1098

Bhp
4.45
5.17
5.97
6.84
7.81
8.90
10.11
11.47

2.0
Bhp
2.39
2.90
3.50
4.20
5.01
5.96
7.06
8.31
9.72
11.32
13.10
15.08

Rpm
776
797
819
843
870
900
932
967
1003
1041
1081
1123

Bhp
4.68
5.43
6.24
7.14
8.13
9.23
10.46
11.82

Rpm
1056
1082
1105
1126
1147
1170
1194
--

3.8
Rpm
1032
1057
1080
1101
1123
1146
1171
1198

Bhp
2.62
3.16
3.77
4.49
5.32
6.28
7.39
8.65
10.07
11.68
13.46
15.45

4.0
Bhp
4.92
5.68
6.52
7.44
8.44
9.56
10.80
--

Units

STATIC PRESSURE(in.
wg)
1.2
1.4
Rpm
744
782
822
864
886
909
954
1002
1050
1100
1151
1203
1229

Bhp
2.17
2.65
3.23
3.91
4.71
5.64
6.73
7.97
9.38
10.97
12.75
14.73

3.6

Rpm
Bhp
982
4.22
1007
4.92
1028
5.69
1049
6.55
1072
7.50
1096
8.57
1122
9.76
1151
11.11
1181 12.61
........

Table 32 -- Fan Performance -- 50AW,AY,A4,A5035
AIRFLOW
(Cfm)

1.6

Bhp
1.94
2.41
2.96
3.62
4.41
5.33
6.40
7.64
9.04
10.63
12.41
14.38

STATIC PRESSURE(in.
wg)
3.2
3.4

Rpm
Bhp
929
3.76
952
4.41
974
5.14
995
5.95
1018
6.87
1043
7.91
1071
9.08
1101
10.39
1133
11.87
1167
13.52
............

Units

Bhp
3.54
4.36
5.30
6.37
6.96
7.58
8.93
10.44
12.10
13.93
15.93
18.11
19.27

1.6
Rpm
815
850
888
927
947
968
1011
1056
1102
1149
1198
1247
1272

(in. wg)
3.4

Rpm
Bhp
1076
5.75
1106
6.82
1136
7.98
1168
9.25
1184
9.93
1201
10.64
1236
12.18
1273
13.86
........

Bhp
3.78
4.62
5.58
6.67
7.27
7.90
9.27
10.79
12.47
14.31
16.33
18.53
19.69

1.8
Rpm
849
883
919
957
977
997
1039
1082
1127
1173
1220
1269
1293

3.6
Rpm
1101
1130
1160
1192
1208
1224
1259
1295

Bhp
5.96
7.05
8.23
9.52
10.22
10.94
12.49
14.19

Bhp
4.01
4.87
5.86
6.97
7.57
8.21
9.60
11.14
12.84
14.70
16.73
18.93
20.11

2.0
Rpm
881
914
949
986
1005
1025
1065
1108
1152
1197
1243
1290
--

3.8
Rpm
1124
1154
1184
1215
1231
1247
1281
....

Bhp
6.16
7.28
8.49
9.80
10.50
11.23
12.80

Bhp
4.24
5.12
6.13
7.26
7.87
8.52
9.93
11.49
13.20
15.08
17.12
19.34
--

4.0
Rpm
1148
1177
1207
1238
1253
1269
--

Bhp
6.36
7.51
8.74
10.07
10.79
11.53
--

-- Bhp to watts:
Bhp x 746
Motor efficiency

3. Variable air volume units will operate down to 70 cfm/ton. Performance at
70 cfm/ton is limited to unloaded operation and may be additionally limited
by edb and ewb conditions.

roof curb, cabinet

22

Table 33 -- Fan Performance -- 50AW,AY036 Units
AVAILABLE

AIRFLOW
(Cfm)

0.2
Rpm
451
499
548
599
649
701
753
805
857
910
963
989

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Bhp
2.13
2.88
3.78
4.86
6.11
7.54
9.18
11.03
13.09
15.38
17.91
19.26

Rpm
5O3
546
591
637
685
734
783
833
884
935
986
1012

1.2
Rpm
682
711
744
779
817
857
899
942
987
1032
1078
1102

Bhp
2.49
3.27
4.20
5.30
6.57
8.03
9.69
11.56
13.64
15.95
18.50
19.86

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Rpm
722
748
778
812
848
886
927
968
1011
1056
1101
1124

2.2
Rpm
866
885
908
934
964
996
1031
1068
1106
1146
1187
1208

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

Bhp
4.39
5.28
6.33
7.55
8.94
10.52
12.30
14.27
16.46
18.87
21.52
22.93

Bhp
6.09
7.03
8.13
9.42
10.89
12.55
14.41
16.48
18.75
21.25
23.98
25.43

Rpm
899
917
939
963
992
1023
1056
1092
1129
1168
1208
1229

3.2
Rpm
1020
1036
1053
1073
1097
1123
1152
1184
1217
1253
1289

7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
17,500

EXTERNAL

2,4

EXTERNAL

Bhp
8.39
9.39
10.55
11.89
13.43
15.17
17.12
19.27
21.65
24.25
27.07

Rpm
1047
1063
1080
1100
1122
1147
1175
1206
1239
1273

STATIC PRESSURE

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.2
Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

499
548
599
649
701
753
805
857
910
963
1016
1069
1122

2,88
3.78
4.86
6.11
7.54
9.18
11.03
13.09
15.38
17.91
20.68
23.71
26.99

546
591
637
685
734
783
833
884
935
986
1038
1090
1142

327
4.20
5.30
6.57
8.03
9.69
11.56
13.64
15.95
18.50
21.29
24.33
27.64

590
631
675
720
766
813
861
910
960
1010
1060
1111
1162

3.66
4.62
5.74
7.04
8.52
10.21
12.09
14.20
16.53
19.09
21.90
24.96
28.29

632
670
711
753
797
842
889
936
984
1033
1082
1132
1182

4.06
5.04
6.19
7.51
9.02
10.72
12.63
14.76
17.11
19.69
22.52
25.60
28.95

Bhp
edb
ewb

2.2

2.4

EXTERNAL
1.0
Rpm
672
708
746
786
828
871
916
962
1008
1056
1104
1153
............

AVAILABLE
2.8

2.6

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

885
908
934
964
996
1031
1068
1106
1146
1187
1230

7.03
8.13
9.42
10.89
12.55
14.41
16.48
18,75
21.25
23.98
26.95

917
939
963
992
1023
1056
1092
1129
1168
1208
1250

748
8.60
9.90
11.39
13.07
14.95
17.03
19.33
21.85
24.60
27.58

948
968
992
1019
1048
1081
1115
1151
1189
1229
1269

7.95
9.08
10.39
11.89
13.59
15.48
17.59
19.91
22.45
25.21
28.22

978
997
1020
1045
1074
1105
1138
1174
1211
1249
1289

8.42
9.56
10.89
12.40
14.11
16.03
18.15
20.48
23.04
25.83
28.86

1007
1026
1047
1071
1099
1129
1161
1196
1232
1270
............

is based on wet coils

STATIC PRESSURE

3.8

STATIC

4,0

Rpm
1101
1116
1133
1151
1171
1195
1221
1250
1280

PRESSURE
1.2

Bhp
10.32
11.39
12.60
13.99
15.56
17.35
19.35
21.56

Units

(in. wg)
1.4

1.6

1.8

2.0

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

446
5.47
6.64
7.99
9.52
11.25
13.18
15.32
17.69
20.30
23.15
26.25

711
744
779
817
857
899
942
987
1032
1078
1126
1173

4.87
5.90
7.09
8.47
10.02
11.77
13.73
15.89
18.28
20.91
23.77
26.89

748
778
812
848
886
927
968
1011
1056
1101
1147
1194

528
6.33
7.55
8.94
10.52
12.30
14.27
16.46
18.87
21.52
24.41
27.54

784
812
844
878
915
953
994
1036
1079
1123
1168
1214

5.70
6.77
8,01
9.43
11.03
12.82
14.82
17.03
19.47
22.13
25.04
28.19

819
845
875
907
943
980
1019
1060
1101
1145
1189
1234

6.14
7.22
8.47
9.91
11.53
13.35
15.37
17.61
20.06
22.75
25.67
28.85

853
877
905
936
970
1006
1044
1083
1124
1166
1209
--

658
7.67
8.94
10.40
12.04
13.88
15.92
18.18
20.66
23.36
26.31
--

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

988
11.05
12.41
13.96
15.71
17.67
19.84
22.23
24.85

1090
1107
1125
1147
1171
1198
1228
1260
1293

10.38
11.56
12.93
14.49
16.25
18.22
20.41
22.82
25.45

1116
1133
1151
1171
1195
1221
1250
1280
....

10.88
12,08
13.45
15.02
16.80
18.78
20.99
23.41

1142
1158
1175
1195
1218
1243
1271
--

11 39
12.60
13.99
15.56
17.35
19.35
21.56
--

STATIC

PRESSURE
3.2

Bhp

Rpm

Bhp

890
10.05
11.39
12.91
14.64
16.57
18.71
21.07
23.64
26.46

1036
1053
1073
1097
1123
1152
1184
1217
1253
1289

9.39
10.55
11.89
13.43
15.17
17.12
19.27
21.65
24.25
27.07

Watts =

roof curb, cabinet losses

Rpm
1126
1142
1158
1175
1195
1218
1243
1271

Bhp
7.91
8.90
10.05
11.39
12.91
14.64
16.57
18.71
21.07
23.64
26.46
27.95

(in. wg)

Bhp
9.34
10.38
11.56
12.93
14.49
16.25
18.22
20.41
22.82
25.45

2. Conversion

economizer

Bhp
983
10.88
12,08
13.45
15.02
16.80
18.78
20.99
23.41

3.0

Rpm
961
978
997
1020
1045
1074
1105
1138
1174
1211
1249
1269

Rpm

LEGEND
-- Brake Horsepower
-- Entering Dry Bulb
-- Entering Wet Bulb

NOTES:
1. Fan performance
2-in. filters.

Rpm
991
1007
1026
1047
1071
1099
1129
1161
1196
1232
1270
1289

Bhp
5.65
6.58
7.67
8.94
10.40
12.04
13.88
15.92
18.18
20.66
23.36
24.80

Bhp

EXTERNAL
3.0
Rpm

Bhp
745
842
956
10.89
12.40
14.11
16.03
18.15
20.48
23.04
25.83
27.32

2.8
Bhp
6.99
7.95
9.08
10.39
11.89
13.59
15.48
17.59
19.91
22.45
25.21
26.69

Rpm
1074
1090
1107
1125
1147
1171
1198
1228
1260
1293

AVAILABLE
0.8

0.6

Rpm

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.4

Rpm
832
853
877
9O5
936
97O
1006
1044
1083
1124
1166
1187

(in. wg)

Table 34 -- Fan Performance -- 50AW,AY,A4,A5040
AIRFLOW
(Cfm)

Bhp
522
614
722
847
991
11.53
13.35
15.37
17.61
20.06
22.75
24.18

Bhp
3.60
4.46
5.47
6.64
7.99
9.52
11.25
13.18
15.32
17.69
20.30
21.69

2,0

Rpm
797
819
845
875
9O7
943
98O
1019
1060
1101
1145
1166

3.6
Bhp
8.86
9.88
11.05
12.41
13.96
15.71
17.67
19.84
22.23
24.85

Rpm
641
672
7O8
746
786
828
871
916
962
1008
1056
1080

1.8
Bhp
4.80
5.70
6.77
8.01
9.43
11.03
12.82
14.82
17.03
19.47
22.13
23.55

Rpm
931
948
968
992
1019
1048
1081
1115
1151
1189
1229
1249

3.4

Bhp
323
406
504
619
751
902
10.72
12.63
14.76
17.11
1969
21.08

(in. wg)

2,6
Bhp
6.54
7.48
8.60
9.90
11.39
13.07
14.95
17.03
19.33
21.85
24.60
26.06

1.0

Rpm
597
632
670
711
753
797
842
889
936
984
1033
1058

STATIC PRESSURE

Rpm
76O
784
812
844
878
915
953
994
1036
1079
1123
1145

AVAILABLE

AIRFLOW
(Cfm)

EXTERNAL

Bhp
2.86
3.66
4.62
5.74
7.04
8.52
10.21
12.09
14.20
16.53
19.09
20.47

1.6

AVAILABLE

AIRFLOW
(Cfm)

(in. wg)
0.8

Rpm
552
59O
631
675
720
766
813
861
910
960
1010
1035

1.4
Bhp
3.99
4.87
5.90
7.09
8.47
10.02
11.77
13.73
15.89
18.28
20.91
22.31

STATIC PRESSURE
0.6

AVAILABLE

AIRFLOW
(Cfm)

EXTERNAL

0.4

--

(in. wg)
3.4

3.6

Rpm
1063
1080
1100
1122
1147
1175
1206
1239
1273
........

3.8

4.0

Bhp to watts:
Bhp x 746
Motor efficiency

3. Variable air volume units will operate down to 70 cfm/ton. Performance at 70 cfm/ton
limited to unloaded operation and may be additional limited by edb and ewb conditions.

and clean

23

is

Table 35 -- Fan Performance -- 50AW,AY041 Units
AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.6

0.4

0.2

1.0

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

499
548
599
649
701
753
805
857
918
963
1016
1069
1122

2.88
3.78
4.86
6.11
7,54
9.18
11.03
13.09
15.38
17,91
20.68
23.71
26.99

546
581
837
885
734
783
833
884
835
986
1038
1090
1142

3.27
4.20
5.30
6,57
8,03
9.69
11.56
13.64
15.95
18.50
21.29
24.33
27.64

580
831
875
720
766
813
861
910
960
1010
1060
1111
1162

3,68
4.62
5,74
7.04
8.52
10.21
12.09
14.20
16.53
19.09
21.90
24.96
28.29

832
870
711
753
787
842
889
936
984
1033
1082
1132
1182

4.08
5,04
6.19
7.51
9.02
10.72
12.63
14.76
17.11
19.69
22.52
25.60
28.95

672
708
746
768
828
871
818
862
1008
1058
1104
1153

Bhp
6.14
7.22
8.47
9.91
11.53
13.35
15.37
17.61
20.06
22.75
25.67
28.85

Bpm
853
877
905
936
970
lOO6
lO44
lO83
1124
1166
12o9

Bhp
8.42
9.56
10.89
12.40
14.11
16.03
18.15
20.48
23.04
25.83
28.86

Bpm
lOO7
lO28
lO47
lO71
lO99
1129
1161
1196
1232
127o

Rpm

AVAILABLE

AIRFLOW
(Cfm)

1.2
Rpm
711
744
779
817
857
899
942
987
1032
1078
1126
1173

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

0.8

Rpm

EXTERNAL

1.4

Rpm

Bhp
4.87
5.90
7.09
8,47
10.02
11.77
13.73
15.89
18,28
20.91
23.77
26.89

Bpm

Bhp
5.28
6.33
7,55
8.94
10.52
12,30
14.27
16.46
18,87
21,52
24,41
27,54

748
778
812
848
886
827
968
1011
1056
1101
1147
1194

STATIC
1.6

PRESSURE

(in.

Bhp
4.46
5,47
6.64
7.99
9.52
11.25
13.18
15.32
17.69
20.30
23.15
26.25

w_)
1.8

2.0

Bpm

Bhp
5.70
8.77
8.01
9,43
11.03
12,82
14,82
17.03
19.47
22.13
25.04
28,19

784
812
844
878
915
953
984
1036
1079
1123
1168
1214

Rpm

819
845
875
907
943
98O
1019
1060
1101
1145
1189
1234

Bhp
6,58
7.67
8.94
10.40
12.04
13.88
15.92
18.18
20.66
23.36
26.31

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

AIRFLOW
(Cfm)

2.2
Rpm
885
908
934
984
986
lO31
lO86
11o6
1146
1187
123o

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

2.4
Bhp
7,03
8,13
9,42
10.89
12.55
14.41
16,48
18.75
21.25
23.98
26.95

Rpm
817
839
863
982
lO23
1056
1092
1129
1168
1208
1250

8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

EXTERNAL

3.4

3.2

STATIC
3.6

976
987
1020
1045
1074
1105
1136
1174
1211
1249
1289

PRESSURE

3.8

4.0

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

1036
1053
1073
1097
1123
1152
1184
1217
1253
1289

9.39
10.55
11.89
13.43
15.17
17,12
19.27
21.65
24.25
27.07

1063
1080
1100
1122
1147
1175
1206
1239
1273

9.88
11.05
12.41
13.96
15.71
17.67
19.84
22.23
24.85

1090
1107
1125
1147
1171
1188
1228
1260
1293

10,38
11.58
12,93
14,49
16.25
18,22
20.41
22.82
25,45

1116
1133
1151
1171
1195
1221
1250
1280

10.88
12,08
13.45
15,02
16.80
18.78
20.99
23.41

AVAILABLE
0.2

0.4

0.6

EXTERNAL

0.8

STATIC

1.0

Bhp
8.90
10.05
11.39
12.91
14.64
16.57
18.71
21.07
23.64
26.46

(in. wg)

Table 36 -- Fan Performance -- 50AW,AY,A4,A5050
AIRFLOW

3.0

Bpm

Bhp
7.95
9.08
10.39
11.89
13.59
15.48
17.59
19.91
22.45
25.21
28.22

948
968
992
1019
1048
1081
1115
1151
1189
1229
1269

AVAILABLE
AIRFLOW
(Cfm)

2.8

2.6

Bpm

Bhp
7,48
8,60
9.90
11.39
13.07
14.95
17.03
19.33
21.85
24.60
27.58

PRESSURE

Bhp

1142
1158
1175
1195
1218
1243
1271

11.38
12,80
13.08
15,58
17.35
19,35
21,58

Units

(in. wg)

1.2

1.4

1.6

1.8

2.0

(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

Rpm

Bhp

Bpm

Bhp

Rpm

Bhp

Bpm

Bhp

Rpm

Bhp

Rpm

Bhp

Bpm

Bhp

Rpm

Bhp

Bpm

Bhp

Rpm

Bhp

509
558
608
659
710
763
815
868
921
974
1028
1081
1135

2.95
3.87
4.96
6.23
7,68
9.35
11.22
13.31
15.64
18.20
21.01
24.08
27.42

555
600
646
694
743
793
843
895
946
998
1050
1103
1155

3.35
4.29
5.40
8.69
8.17
9.86
11.75
13.86
18.21
18.79
21.62
24.71
28.06

599
640
683
728
775
823
871
921
971
1021
1072
1124
1175

3.74
4.71
5.85
7.16
8.67
10.37
12.29
14.42
16.78
19.39
22.24
25.35
28.72

640
678
719
762
808
852
899
946
995
1044
1094
1145
1195

4.14
5.13
6.30
7,64
9.17
10.89
12.83
14.98
17,37
19.99
22.86
25,99
29.38

680
715
754
794
836
880
925
972
1019
1067
1118
1165
1215

4.54
5.56
6.75
8.11
9,67
11.42
13.38
15.55
17.96
20.60
23.48
28.63
30.04

718
751
787
825
866
908
952
997
1043
1089
1137
1185
1234

4.95
5.99
7.20
8.59
10.17
11.94
13.92
16.12
18.54
21.21
24.12
27.28
30.71

755
786
819
856
895
935
978
1021
1066
1112
1158
1208
1254

5.36
6.42
7.66
9.07
10.67
12.47
14.47
18.69
19.14
21.82
24.75
27,93
31.38

791
819
851
886
923
962
1003
1045
1089
1134
1179
1226
1273

5.79
6.87
8.12
9,55
11.17
12.99
15.02
17.26
19.73
22.43
25.38
28.58
32.05

826
852
882
915
950
988
1028
1069
1111
1155
1200
1245
1292

6.22
7.31
8,58
10.04
11.68
13.52
15.57
17,83
20.32
23.05
26,02
29.24
32.72

859
884
912
943
978
1014
1052
1092
1134
1176
1220
1265
--

6.66
7.77
9.06
10.53
12.19
14.05
18.12
18.41
20.92
23.66
28.65
29.90
--

Bbp
9,98
11.18
12.53
14.09
15.86
17.85
20.04
22.47
25.12

Rpm
1095
1112
1131
1153
1178
1206
1236
1268
......

Bhp
10,48
11.67
13.05
14.63
18.41
18.40
20.62
23.05

Bpm
1121
1138
1158
1177
1201
1228
1257
1289

Bbp
10.98
12.19
13.58
15.18
16.96
18.98
21.19
23.65

Rpm
1147
1163
1181
1201
1224
1250
1278
--

AVAILABLE

AIRFLOW
(Cfm)
8,000
9,000
10,000
11,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000

2.2
Rpm
892
915
941
871
1004
1039
1076
1115
1156
1198
1240
1284

2.4
Bhp
7.12
8,23
9.53
11.02
12.70
14,59
16.68
18.98
21.82
24.28
27.29
30.55

Bpm
Bbp
923
7.57
945
8.70
970
10.02
999
11.52
1030
13.22
1064
15.12
1100
17.23
1138
19.56
1178
22.11
1218
24.90
1260
27.93
..................

2.6
Rpm
954
975
998
1026
1056
1088
1123
1160
1199
1239
1280

2.8
Bhp
8,04
9.18
10.51
12.02
13.74
15.66
17.79
20.14
22.71
25.52
28.57

Bpm
984
1003
1026
1052
1081
1113
1147
1182
1220
1259
1300

Bbp
8,52
9.67
11.00
12.53
14.28
16.20
18,35
20.72
23.31
26,14
29.21

EXTERNAL
3.0
Rpm
1013
1032
1053
1078
1108
1136
1169
1204
1241
1279
............

Bhp
9.00
10,16
11.51
13.05
14.79
16.74
18,91
21.30
23.91
26.76

LEGEND
Bhp

--

edb
-ewb
-NOTES:

Brake
Entering
Entering

1. Fan performance
filters.

STATIC

PRESSURE/in.
3.2

Rpm
1041
1059
1080
1103
1130
1160
1192
1226
1262
1299

Bhp
9.49
10.66
12.01
13.57
15.33
17,29
19.48
21.88
24.81
27.38

2. Conversion--

w_!
3.4
Bpm
1069
1088
1108
1128
1154
1183
1214
1247
1282
........

3.6

3.8

4.0
Bhp
11.49
12.71
14.11
15.71
17.51
19,53
21.77
--

Bhp to watts:

Horsepower
Dry
Wet

Bulb
Bulb

is based

Watts

on wet

coils,

economizer,

roof

curb,

cabinet

losses,

and

clean

2-in.

3. Variable
unloaded

24

=

Bhp x 746
Motor efficiency

air volume
operation

units will operate
down
and may be additionally

to 70 cfm/ton.
Performance
at 70 cfm/ton
limited by edb and ewb conditions.

is limited

to

Table 37 -- Fan Performance -- 50AW,AY051 Units
AVAILABLE

AIHI=LUW
(Cfm)

0.2

Rpm
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

429
49O
522
554
586
619
652
685
719
753
787
821
855
889
924

EXTERNAL

0.4
Bhp
2.98
4.48
5.39
6.41
7.56
8,83
10.23
11.76
13.44
15.26
17,23
19.35
21.63
24.07
26.67

Rpm
488
543
572
6o2
632
663
694
725
757
789
822
855
888
921
954

1.2

10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

EXTERNAL

1.4

(in. w_)
0.8

STATIC

1.0

Rpm
585
634
659
686
713
741
769
798
827
857
887
918
949
980
1011

PRESSURE

Rpm

Bhp
4.95
6.61
7.61
8.72
9.94
11.30
12.78
14.39
16.14
18.04
20.08
22.28
24.63
27.14
29.82

(in. wg)

1.6

2.0

1.8

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

666
711
734
759
784
810
836
863
890
918
947
976
1005
1035
1065

6,41
8,14
9,18
10.33
11.60
13.00
14.53
16,20
18,00
19.94
22.03
24.28
26,68
29.24
31.96

703
746
769
792
816
841
867
893
920
947
975
1003
1032
1061
1090

7,17
8,94
9.99
11.16
12.45
13.87
15.42
17.11
18.94
20.90
23.02
25.28
27.71
30.29
33.04

737
779
801
824
848
872
897
922
949
975
1002
1030
1058
1086
1115

7.96
9,76
10.82
12,01
13,32
14.76
16.33
18.04
19.88
21.87
24.01
26.30
28.75
31.35
34.12

770
811
832
855
878
901
926
950
976
1002
1029
1056
1083
1111
1139

8.78
10.60
11.68
12.88
14.21
15.66
17.25
18.98
20.84
22.85
25.01
27.32
29.79
32.42
35.21

801
841
862
884
906
929
953
978
1003
1028
1054
1081
1108
1135
1163

Bhp
13.11
15.06
16.20
17.47
18.87
20.39
22.06
23.86
25.81
27.91
30.16
32.57
35.13

Rpm
941
977
996
1016
1036
1057
1079
1101
1124
1148
1172
1196

Rpm

AVAILABLE
2.2
Rpm
831
87o
891
912
934
957
980
lOO4
1028
1053
1079
1105
1131
1158
1186

AIHPLUW

EXTERNAL

2.4
Bhp
10.46
12.33
13.44
14.67
16.02
17.51
19.13
20.89
22.80
24.85
27,04
29.39
31.90
34.57
37.41

Rpm
860
898
918
939
961
983
1006
1029
1053
1078
1103
1129
1155
1181

3.2

STATIC

PRESSURE

Bhp
9.61
11.45
12.55
13.76
15.11
16.58
18.19
19.93
21.81
23.84
26.02
28.35
30.85
33.49
36.31

3.0

2.8

Rpm

Rpm

Bhp
12.21
14.13
15.27
16.52
17.90
19.42
21.07
22.86
24.80
26.88
29.11
31.50
34.05

888
925
945
965
987
1008
1031
1054
1078
1102
1126
1152
1177

915
951
971
991
1012
1033
1055
1078
1101
1125
1149
1174
1199

AVAILABLEEXTERNALSTATICPRESSURE(in.w_)
3.6

3.4

Rpm

(in. wg)

2.6
Bhp
11.33
13.22
14.35
15.59
16.96
18.46
20.10
21.87
23.79
25.86
28.07
30.44
32.97
35.66

Bhp
5.66
7.36
8.38
9.51
10.77
12.14
13.65
15.29
17.07
18.99
21.05
23.28
25.65
28.19
30.89

627
673
698
723
749
776
803
831
860
888
918
947
977
1008
1038

Rpm

AIHI=LUW
_L.,/ )
"^'m"
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

PRESSURE

Bhp
4.26
5.88
6.85
7.94
9.14
10.46
11.92
13.51
15.23
17.10
19.12
21.29
23.62
26.11
28.76

539
591
618
645
674
703
733
763
793
824
855
887
919
951
983

AVAILABLE
AIHI=LUW
t_.4
)'^'m"

STATIC
0.6

Rpm

Bhp
3.61
5.17
6.11
7,17
8,34
9.64
11.07
12,63
14.33
16.18
18,17
20.32
22.62
25,08
27,71

Bhp
14.02
16.00
17.16
18.44
19.84
21.38
23.06
24.88
26.84
28.96
31.22
33.65

3.8

4.0

(Cfm)
10,000
12,000
13,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

966
1002
1020
1040
1060
1081
1102
1124
1147
1170
1194

14.94
16.96
18,13
19,42
20.83
22.39
24.07
25.91
27.89
30.01
32.30

991
1026
1044
1063
1083
1104
1125
1147
1169
1192

15.88
17.92
19.11
20.41
21.84
23.40
25.10
26.94
28.94
31.08

1014
1049
1067
1086
1106
1126
1147
1169
1190

16.83
18,90
20,10
21.41
22,85
24,43
26.14
28,00
30,00

1038
1072
1090
1109
1128
1148
1169
1190

17.79
19.89
21.10
22.43
23.88
25.47
27.19
29.06

Table 38 -- Fan Performance -- 50AW,AY,A4,A5060
AVAILABLE
AIHPLUW

0.2

0.4

0.6

EXTERNAL

0.8

STATIC

1.0

PRESSURE

Bhp

1060
1094
1112
1131
1150
1170
1190

18.76
20.89
22.12
23.46
24.92
26.52
28.26

Units

(in. wg)

1.2

1.4

1.6

1.8

2.0

(Cfm)
12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

AIRFLOW
(Cfm)

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

Rpm

Bhp

490
554
586
619
652
685
719
753
787
821
855
889
924
958
993

4.48
6.41
7.56
8.83
10.23
11.76
13.44
15.26
17.23
19.35
21.63
24.07
26.67
29.45
32.40

543
602
632
663
694
725
757
789
822
855
888
921
954
987
1021

5.17
7.17
8.34
9.64
11.07
12.63
14.33
16.18
18.17
20.32
22.62
25.08
27.71
30.61
33.49

591
645
674
703
733
763
793
824
855
887
919
951
983
1016
1048

5.88
7.94
9.14
10.46
11.92
13.51
15.23
17.10
19,12
21.29
23.62
26.11
28.76
31.59
34.58

634
686
713
741
769
798
827
857
887
918
949
980
1011
1043
1075

6,61
8,72
9.94
11.30
12.78
14.39
16.14
18,04
20.08
22.28
24.63
27,14
29.82
32.67
35.69

674
723
749
776
803
831
860
888
918
947
977
1008
1038
1069
1101

7.37
9.51
10.77
12.14
13.65
15.29
17.07
18.99
21.05
23.28
25.65
28.19
30.89
33.76
36.80

711
759
784
810
836
863
890
918
947
976
1005
1035
1065
1095
1126

8.14
10.33
11.60
13.00
14,53
16.20
18,00
19.94
22.03
24.28
26.68
29.24
31.96
34.85
37.92

746
792
816
841
867
893
920
947
975
1003
1032
1061
1090
1120
1150

8.94
11.16
12.45
13.87
15.42
17.11
18.94
20.90
23.02
25.28
27.71
30.29
33.04
35.95
39.04

779
824
848
872
897
922
949
975
1002
1030
1058
1086
1115
1144
1174

9.76
12.01
13.32
14.76
16.33
18.04
19,88
21.87
24.01
26.30
28,75
31.35
34.12
37.06
40.17

811
855
878
901
926
950
976
1002
1029
1056
1083
1111
1139
1168
1197

10.60
12.88
14.21
15.66
17.25
18,98
20.84
22.85
25.01
27,32
29.79
32.42
35.21
38.17
41.30

841
884
906
929
953
978
1003
1028
1054
1081
1108
1135
1163
1191
--

11,45
13.76
15.11
16.58
18.19
19.93
21.81
23.84
26.02
28.35
30.85
33.49
36.31
39.29
--

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
2.2

2.4

2.6

2.8

3.0

12,000
14,000
15,000
16,000
17,000
18,000
19,000
20,000
21,000
22,000
23,000
24,000
25,000
26,000
27,000

3.2

3.4

3.6

3.8

4.0
20.89
23.46
24.92
26.52
28.26

25

Table 39 -- Motor Limitations
HIGH-EFFICIENCY
Nominal
Bhp
5

BkW
3.73

7.5

5.6

10

7.46

15

11.19

20

14.92

25

18.65

30

22.38

40

29.84

Bhp
5.9
8.7
9.5
10.2
11.8
15.3
18.0
22.4
23.4
28.9
29.4
35.6
34.7
42.0

BkW
4.40
6.49
7.09
7.61
8.80
11.41
13.43
16.71
17.46
21.56
21.93
26.56
25.89
31.33

Nominal
Bhp
5

BkW
3.73

7.5

5.6

10

7.46

15

11.19

20

14.92

25

18.65

30

22.38

40

29.84

Bhp
5.9
8.7
9.5
10.2
11.8
15.3
18.0
22.4
23.4
28.9
29.4
35.6
34.7
42.0

230 v
15.0
23.5
-31.0
-46.0
-60.0
-73.0
-91.0
-110.0

PREMIUM-EFFICIENCY
Maximum
BkW
4.40
6.49
7.09
7.61
8.80
11.41
13.43
16.71
17.46
21.56
21.93
26.56
25.89
31.33

LEGEND
Bhp
BkW

---

MOTORS

Maximum

Maximum Amps
460 v
7.9
-12.0
-15.0
-22.0
-28.7
-37.4
-43.8
55.0

575 v
6.0
-10.0
-12.0
-19.0
-23.0
-28.4
-36.3
43.8

Maximum
Watts
5,030
7,717
8,008
9,502
9,836
12,543
14,756
18,363
19,183
23,511
23,918
28,742
28,015
33,690

Maximum
Efficiency
87.5
84.1
88.5
89.5
89.5
91.0
91.0
91.0
91.0
91.7
91.7
92.4
92.4
93.0

MOTORS
Maximum
230 v
15.8
23.5
-30.0
-46.0
-59.0
-73.0
-82.6
-110.0

Amps
460 v
7.9
12.0
15.0
22.0
28.7
36.3
41.7
55.0

Maximum
Watts
4,918
7,078
7,728
8,298
9,600
12,273
14,439
17,853
18,650
23,034
23,432
28,374
27,656
33,156

Maximum
Efficiency
89.5
91.7
91.7
91.0
91.7
91.7
93.0
93.0
93.6
93.6
93.6
93.6
93.6
94.5

Using the fan motors up to the horsepower ratings shown in the Motor Limitations table will not result in nuisance tripping or premature motor failures. Unit warranty will not be affected.
2. All motors comply with Energy Policy Act (EPACT) Standards effective
October 24, 1997.

Brake Horsepower
Brake Kilowatts

NOTES:
1. Extensive motor and electrical testing on the Carrier units has ensured that
the full horsepower range of the motor can be utilized with confidence.

Table 40A -- Air Quantity Limits (48AJ,AK,AW,AY,A2,A3,A4,A5)
UNIT SIZE*
020
025
027
030
035 (AJ,AK,AW,AY)
035(A2,A3,A4,A5)
036,040,041
050
051,060

MINIMUM HEATING
AIRFLOW CFM
(Low Heat)
5,900
5,900
5,900
5,900
5,900
5,900
7,600
7,600
11,000

MINIMUM HEATING
AIRFLOW CFM
(High Heat)
6,100
6,100
6,100
6,100
6,100
10,100
10,100
10,100
10,100

MINIMUM COOLING
AIRFLOW (VAV) CFM
AT FULL LOAD
4,000
5,000
5,400
6,000
7,000
7,000
8,000
10,000
12,000
* Sizes 036,041,

MINIMUM COOLING
AIRFLOW CFM
(CV)
6,000
7,500
8,100
9,000
10,500
10,500
12,000
15,000
18,000

MAXIMUM AIRFLOW
CFM
10,000
12,500
13,500
15,000
17,500
17,500
20,000
22,500
27,000

and 051 are 48AJ,AK,AW, AY only.

LEGEND
CV
VAV

---

NOTE: Variable air volume units will operate down to 70 cfm/ton in Cooling
mode. Performance at 70 cfm/ton is limited to unloaded operation and may be
also limited by edb (entering dry bulb) and ewb (entering wet bulb) conditions.

Constant Volume
Variable Air Volume

26

Table 40B -- Air Quantity Limits (50AJ,AK,AW,AY,A2,A3,A4,A5)
UNIT

COOLING

50AJ,AW, A2,A3020
50A K,AY, A4,A5020
50AJ,AW, A2,A3025
50A K,AY, A4,A5025
50AJ,AW, A2,A4027
50A K,AY, A3,A5027
50AJ,AW, A2,A4030
50A K,AY, A3,A5030
50AJ,AW, A2,A4035
50AJ,AW036
50A K,AY, A3,A5035
50AK,AY036
50AJ,AW, A2,A4040
50AJ,AW041
50A K,AY, A3,A5040
50AK,AY041
50AJ,AW, A2,A4050
50A K,AY, A3,A5050
50AJ,AW051
50AJ,AW, A2,A4060
50AK,AY051
50A K,AY, A3,A5060
*Operation

Max CFM*

6,000
4,000
7,500
5,000
8,100
5,400
9,000
6,000
10,500
10,500
7,000
7,000
12,000
12,000
8,000
8,000
13,500
10,000
18,000
18,000
12,000
12,000

10,000
10,000
12,500
12,500
13,500
13,500
15,000
15,000
17,500
17,500
17,500
17,500
20,000
20,000
20,000
20,000
20,000
20,000
27,000
27,000
27,000
27,000

at these levels may be limited by entering

CONTROLS

QUICK

ELECTRIC

Min CFM

evaporator

START

5.

IMPORTANT:
The unit is shipped with the unit control
disabled. Enable the control by setting Local Machine Disable (Service Test--+STOP) to No.

Volume
Units
with
E To configure the unit, per-

form the following:
1. The type of control is configured under Configuration
--+UNIT--+C. TYP Set C TYP to 4 (TSTAT 2 STG).
2.

Remove jumpers
control box.

from R-W2 and W2-W1 on TB4 in the

3.

See Economizer Options section on page 28 for additional economizer option configurations.

4.

See Exhaust Options section on page 29 for additional
exhaust option configurations.

10,500

20,000

15,000

27,000

2.

Under Configuration--_UNIT--+SENS--+SPT.S,
enable
the space sensor by setting SPT.S to ENBL (enable).

3.

Install jumpers between
the control box.

Occupied

Heat Setpoint

O(SP

Occupied

Cool Setpoint

UHSP

Unoccupied

U_SP

Unoccupied

GAP

Heat-Cool

Heat Setpoint
Cool Setpoint
Setpoint Gap

The degrees of demand from the space temperature set
points are configured under the (bnfiguration--+D.LET
submenu. See the Heating Control and Cooling Control
sections for further description on these configurations.
The following set points may be configured:
L.H.ON
H.H.ON

Demand Level Lo Heat On
Demand Level Hi Heat On

L.H.OF

Demand Level Lo Heat Off

L.C.ON

Demand Level Lo Cool On

H.C.ON

Demand Level Hi Cool On

L.C.OF

Demand Level Lo Cool Off

7.

To program thne schedules, set SCH.N=I
uration_CCN-+SCOV--+SCH.N
to
control to use local schedules.

8.

Under the Timeclock-+SCI-I.L
submenu,
enter the
desired schedule. See Time Clock Configuration
section
on page 75 for further description of these configurations.

9.

Under the Configuration_'CN-cSC.OV
submenu, the
following schedules and overrides should be configured:

10.

on TB4 in

OHSP

Under (bnfiguration-+UNIT_'V..FN,
set CV.FN to 1
for continuous fan or 0 for automatic fan.

1. The type of control is configured under (bnfiguration
--+UNIT--+C. TYP. Set C TYP to 6 (SPT 2 STG).

and W2-W1

15,000

6.

Two-Stage Constant Volume Units with Space
Sensor E To configure the unit, perform the following:

R-W2

6,000

be configured.
See the Heating Control and Cooling
Control sections on pages 50 and 37 for further description on these configurations.
The following set points
may be configured:

IMPORTANT: The (_nfortLink
controls provide the user
with numerous configuration options such as set points,
demand levels, reset, and many others. If the building
owner or design engineer has not provided specific recommendations for these configuration settings, it is suggested
that the installer do not make changes to the default factory
settings. The factory-configured
default values are appropriate for many applications.

Constant
Thermostat

Max CFM

air wet bulb temperatures.

The following section will provide a quick user guide to setting up and configuring the A Series units with (_l_fortLink TM
controls. See Basic Control Usage section on page 3 for information on operating the control. For wiring information, refer
to unit wiring diagrams in the Major System Components section on page 101.

Two-Stage
Mechanical

HEAT

Min CFM

O.T.L

Ovemde

SPT.O
7"58.0

SPT override enabled?
T58 ovemde enabled?

under (bnfigconfigure
the

time limit

See Economizer Options section on page 28 for additional economizer option configurations.

11. See Exhaust Options section on page 29 for additional
exhaust option configurations.

4. The space temperature set points are configured under the
Setpoints menu. The heating and cooling set points may
27

Variable

Air

Volume

Units

Using

Return

5.

Air

Sensor or Space Temperature Sensor -- To configure the unit, perform the following:

Multi-Stage

1. The type of control is configured under Cbnfiguration
--_UNIT-+C TYP Set C TYP to 1 (VAV-RAT) for return
air sensor. Set C !TP to 2 (VAV-SPT) for space temperature sensor.

Space

2.

Install jumpers between
the control box.

3.

The space temperature set points and the supply air set
points are configured under the Setpoints menu. The
heating and cooling set points must be configured. See
the Heating Control and Cooling Control sections for
further description on these configurations. Configure the
following set points:
OHSP
OCNP
UHSP
EC.ON
V.C OF
SASP

4.

5.

6.

Units

the

unit,

2.

Install jumpers between
the control box.

R-W2

TYp

4.

OHSP

Occupied

Heat Setpoint

OCSP

Occupied

Cool Setpoint

UHSP

Unoccupied

UCSP

Unoccupied

GAP

Heat-Cool

SA.HI

Supply Air Set Point Hi

SA.LO

Supply Air Set Point Lo

Cool Setpoint

The degrees of demand from the space temperature set
points are configured under the Cbnfiguration-+D.LV.T
submenu. See the Heating Control and Cooling Control
sections for further description on these configurations.
Configure the following set points:

Demand Level Hi Heat On

Under the Timeclock-+SCI-I.L
submenu, enter the desired schedule. See Time Clock Configuration section on
page 75 for further description of these configurations.

L.H.OF

Demand Level Lo Heat On

L.C.ON

Demand Level Lo Cool On

H.C.ON

Demand Level Hi Cool On

Under Configuration-+SP-+SRSP
the supply duct Static Pressure Setpoint should be configured.

LC.OF

Demand Level Lo Cool On

5.

Under Cbnfiguration--+UNIT--+SENS--+SPT.S,
the space sensor by setting SPT.S to ENBL.

6.

Under Cbnfiguration-+UNIT_,CV..FN,
for continuous fan or 0 for automatic

Static Pressure Setpoint

EDT Reset Configuration
Reset Ratio (ifRS.CF

= 1 or 2)

LIMT

Reset Lhnit (ifRS.CT

= 1 or 2)

RES.S

EDT 4-20 mA Reset Input (ifRS. CT = 3)
either RTIO

and LIMT

or RES.S.

See the Economizer
ditional economizer

9.

See the Exhaust Options section onpage
exhaust option configurations.

Multi-Stage

the
set

All three

Options section on this page for adoption configurations.

Constant

Volume

8.

Under the Timeclock-+SCI-I.L
submenu, enter the desired schedule. See Thne Clock Configuration section on
page 75 for further description of these configurations.

9.

See the Economizer Options section below for additional
economizer option configurations.

10.

See the Exhaust Options section on page 29 for additional
exhaust option configurations.

ECON

EC.EN
EC.MN
EC.MX

1. Under Configuration-+UNIT_C
(TSTAT MULTI).

TYp

set C: TYP to 3

E. TRM
E.SEL

Remove jumpers from R-W2 and W2-W1 on TB4 in the
control box. Connect thermostat to TB4.

3. Under the Setpoints
configurations:

menu,

set

the

OA.E. C
OA.EN

following

OAT.L
O.DEW

SA.HI
SA.LO

Supply Air Set Point Hi
Supply Air Set Point Lo

See the Economizer
ditional economizer

Options _

Under the

ORH.S

Economizer
Economizer
Economizer
Economizer

Enabled?
Min.Position
Maximum Position
Trim for SumZ?

Econ Changeover Select
OA Enthalpy Change Over Select
Outdoor Enthalpy Compare Value
High OAT Lockout Temp
OA Dew Point Temp Limit
Outside Air RH Sensor

Configuration--_ECON-+EC.MN
the minimum damper position.

Options section on this page for adoption configurations.
28

Cbnfiguration--+

submenu, the following set points ]nay be configured:

with

form the following:

set CV..FN to 1
fan.

To program thne schedules, set SCI-LN=I under Cbnfiguration_,CCN-+SCOV-+SCI-I.N
to configure the control to use local schedules.

the unit, per-

Units

enable

7.

Economizer

29 for additional

Mechanical Thermostat E To configure

on TB4 in

Setpoint Gap

Demand Level Lo Heat On

R TIO

set C: TYP to 5

Heat Setpoint

H.H.ON

RS. CF

the

3. Under the Setpoints menu, the following configurations
should be set:

on TB4 in

If supply air temperature
reset is desired, under
Configuration-+EDT.R
submenu,
the following
points should be configured:

with

perform

and W2-Wl

L.H.ON

8.

4.

Volume

To configure

To program time schedules, make sure SCI-LN=I under
Configuration--cCCN--cSC:OV--cSCH.N
to configure
the control to use local schedules.

NOTE: Configure
are not used.

2.

E

1. Under Configuration-+UNIT_C
(SFr MULTI).

Occupied Heat Setpoint
Occupied Cool Setpoint
Unoccupied Heat Setpoint
VAV Occupied Cool On Delta
VAV Occupied Cool OffDelta
Supply Air Setpoint

SRSP
7.

and W2-Wl

Constant

Sensor

following:

NOTE: For VAV with a space sensor (VAV-SPT), under
Configuration-+UNIT-+SENS-+SPT.S,
enable
the
space sensor by setting SPT.S to ENBL.
R-W2

See the Exhaust Options section on page 29 for additional
exhaust option configurations.

should always be set for

Indoor

Air Quality

(IAQ) Options

correct value for hours, in 24-hour (military) time. Press
ENTER and hour value is saved and the minutes digits
will start flashing. Use the same procedure to display and
save the desired minutes value. Press ESCAPE.

DEMAND CONTROL
VENTILATION
-- Under (bnfiguration-+IAQ-+DCV.C,
the following configuration parameters should be set to establish the minflnum and maximum
points for outdoor air damper position during demand control
ventilation (DCV):
ECMN
Economizer Min.Position
IAQ.M

4.

Configure the unoccupied
time for period 1 (UNO.
Scroll down to UNC and press ENTER to go into Edit
mode. The first two digits of the 00.00 will start flashing.
Use the UP or DOVv2',Ikey to display the correct value for
hours, in 24-hour (military) time. Press ENTER and hour
value is saved and the minutes digits will start flashing.
Use the same procedure to display and save the desired
minutes value. Press ESCAPE.

5.

Scroll to DAYS and press ENTER. Scroll down to the
MON point. This point indicates if schedule 1 applies to
Monday. Use the ENTER colrnnand to go into Edit
mode, and use the UP or DOWN key to change the display to YES or NO. Scroll down through the rest of the
days and apply schedule 1 where desired. The schedule
can also be applied to a holiday. Press ESCAPE.

6.

The first schedule is now complete. If a second schedule
is needed, such as for weekends or holidays, scroll down
and repeat the entire procedure for period 2 (PER.2). If
additional schedules are needed, repeat the process for as
many as are needed. Eight schedules are provided.

IAQ Demand Vent Min.Pos.

Configuration -+IAQ-+DCV..C-+IAQ.M
is used to set the
absolute lninimum vent position (or maximum reset) under
DCV.
Configuration-+IAQ-+DCV.C-+EC.MN
is used to set the
minimum damper position (or with no DCV reset). This is also
referenced in the economizer section.

Exhaust Options

E The A Series units can be configured with constant volume 2-stage power exhaust or modulating power exhaust. The following exhaust options should be
configured.
Configuration-+BP-+BECF=l
(Two-Stage
Exhaust
-- For two-stage exhaust, under the Configuration
--+BP submenu, configure the following:
BRP1

Power Exhaust

On Setp. 1

BRP2

Power Exhaust

On Setp.2

SERVICE

General

-- The units are equipped with a Service Test feature, which is intended to allow a service person to force the
unit into different modes of operation to test them. To use this
feature, enter the Service Test category on the local display and
place the unit into the test mode by changing Service
Test-+TESTfrom
OFF to ON. The display will prompt for the
password before allowing any change. The default password is
1111. Once the unit enters the Service Test mode, the unit will
shut down all current modes.

Con.figuration --+BP--+BE CF=2 (Modulating Power Exhaust
-- For modulating exhaust, in the Configuration-+
BP submenu, configure the following:
BRSP

Programming

Building Pressure Setp.

Operating

Schedules

E

The

(_,fortLink
TM
controls will accolmnodate up to eight different schedules (Periods 1 through 8), and each schedule is
assigned to the desired days of the week. Each schedule
includes an occupied on and off tflne. As an example, to set an
occupied schedule for 8 AM to 5 PM for Monday through
Friday, the user would set days Monday through Friday to ON
for Period 1. Then the user would configure the Period 1
Occupied From point to 08:00 and the Period 1 Occupied To
point to 17:00. To create a different weekend schedule, the user
would use Period 2 and set days Saturday and Sunday to ON
with the desired Occupied On and Ofttimes. To create a schedule, perform the following procedure:

TEST-The TEST colranand turns the unit off (hard stop)
and allows the unit to be put in a manual control mode.
STOPThe STOP colranand completely disables the unit
(all outputs turn off ilranediately). Once in this mode, nothing
can ovemde the unit to turn it on. The controller will ignore all
inputs and colmnands.
S.STP
Setting Soft Stop to YES turns the unit off in an
orderly way, honoring any time guards currently in effect.
FAN.F-By turning the FAN FORCE on, the supply fan is
turned on and will operate as it normally would, controlling
duct static pressure on VAV applications or just energizing the
fan on CV applications. To remove the force, press ENTER
and then press the UP and DOWN arrows shnultaneously.

NOTE: By default, the tflne schedule periods are progralmned
for 24 hours of occupied operation.
1. Scroll to the Configuration
mode, and select CCN
CONFIGURATION
(('(Pc). Scroll clown to the Schedule
Number (Configuration
_CCN-+SC
OV-+SCI-I.N).
If
password protection has been enabled, the user will be
prompted to enter the password before any new data is
accepted. S(7-!.N has a range of 0 to 99. The default value is 1. A value of 0 is always occupied, and the unit will
control to its occupied set points. A value of 1 means the
unit will follow a local schedule, and a value of 65 to 99
means it will follow a CCN schedule. Schedules 2 to 64
are not used as the control only supports one internal/local schedule. If one of the 2 to 64 schedules is configured,
then the control will force the number back to 1. Make
sure the value is set to 1 to use a local schedule.
2.

3.

TEST

E4.CH-The 4-Inch Filter Change Mode variable is used to
service the unit when 4-in. filters are used. When the filters
need to be changed, set Service Test-+E4. (7-/= YES. The unit
will be placed in Service Test mode and the economizer will
move to the 40% open position to facilitate removal of the 4-in.
filters. After the filters have been changed, set Service
Test-+E4.CI-I=
NO to return the unit to normal operation.
The remaining
categories:
INDP, FANS,
COOL,
HEAT are sub-modes with separate items and functions.
Table 41.

Service Test Mode Logic

and
See

-- Operation in the Service
Test mode is sub-mode specific except for the Independent submode. Leaving the sub-mode while a test is being performed
and attempting to start a different test in the new sub-mode will
cause the previous test to terminate. When this happens, the
new request will be delayed for 5 seconds. For example, if compressors were turned on under the COOL sub-mode, any attempt to turn on heating stages within the HEAT sub-mode
would ilranediately turn offthe compressors and, 5 seconds later, the controller would honor the requested heat stages.

Enter the Time Clock mode. Scroll down to the LOCAL
TIME SCHEDULE
(SCH.L)
sub-mode,
and press
ENTER. Period 1 (PER.l) will be displayed. Press ENTER to configure Period 1.
Configure the beginning of the occupied thne period for
Period 1 (O('().
Scroll down to O('(' and press ENTER
to go into Edit mode. The first two digits of the 00.00 will
start flashing. Use the UP or DOWN key to display the

29

Howevec
it is important
tonotethattheusercanleavea
Service
Test]nodetoviewanyofthelocaldisplay
modes
and
thecontrol
willremain
in the Service Test ]node.

individually. After starting each compressor, the control will
check the suction pressure after 5 seconds of run time. If the
control does not see a sufficient decrease in suction pressure
after 5 seconds, mechanical cooling will be shut down, and an
alarm will be generated (A140). This alarm requires a manual
reset. If this alarm occurs, do not attempt a restart of the
compressor and do not attempt to start any other compressors
until the wiring to the unit has been corrected.

Independent Outputs -- The

INDP sub-mode items
can be turned on and off regardless of the other category states.
For example, the alarm relay can be forced on in the INDP
sub-mode and will remain on if compressor relays are requested in the COOL sub-mode.

Fans in Service Test Mode -- Upon

entering

Heating in Service
Test Mode _ If unit has a thermostat connected (C TYP = 3 or 4), install the RED jumper

the

FANS sub-mode, the user will be able to turn the supply fan on
and off, set the supply fan VFD speed, and turn the condenser
fans on and off.

Cooling

in Service

Test Mode --

wires between TB4, terminals R (1), W2 (3) and Wl (4). Terminal block TB4 is located in the unit control box. Remember
to disconnect these jumpers when Test Mode is completed. The
Heat Test Mode sub-mode will offer automatic fan start-up if
the unit is not a gas heat unit. On gas heat units, the IGC feedback from the gas control units will bring the fan on as
required.

The COOL sub-

]node offers different cooling service tests.
The user has manual relay control of individual compressors. If the user energizes mechanical cooling, the supply fan
and the outdoor fans will be started automatically.
During
mechanical cooling, the unit will protect itself. Compressor
diagnostics are active, monitoring for high discharge pressure,
low suction pressure, etc. The user can also turn the hot gas
bypass valve on and off.

Within this sub-mode, the user has control of heat relays 1
to 6. The user can also turn on the requested heat stage.
NOTE: When service test has
thermostat connected (CTYP
jumper wires at TB4, terminals
Terminal block TB4 is located
these jumpers in the unit control

NOTE: It is crucial that proper compressor rotation be verified
during the service test. Each compressor
must be tested

been completed, if unit has a
= 3 or 4), remove the RED
R (1), W2 (3) and Wl (4).
in the unit control box. Store
box for future use.

Table 41 -- Service Test
ITEM
TEST
STOP
S.STP
FAN.F
F.4.CH
INDP
ECN. C
E.PWR
E.CAL
PE.A
PE.B
PE.C
H.I.R
ALRM
FANS
S.FAN
S. VFD
CD.F.A
CD.F.B
COOL
A1
A2
MLV
B1
B2
HEAT
HT.ST
HT.1
HT.2
HT.3
HT.4
HT.5
HT.6

EXPANSION
Service Test Mode
Local Machine Disable
Soft Stop Request
Supply Fan Request
4 in. Filter Change Mode
TEST INDEPENDENT OUTPUTS
Economizer Act.Cmd.Pos.
Economizer Power Test
Calibrate the Economizer?
Power Exhaust Relay A
Power Exhaust Relay B
Power Exhaust Relay C
Heat Interlock Relay
Remote Alarm/Aux Relay
TEST FANS
Supply Fan Relay
Supply Fan VFD Speed
Condenser Fan Circuit A
Condenser Fan Circuit B
TEST COOLING
Compressor A1 Relay
Compressor A2 Relay
Min. Load Valve (HGBP)
Compressor B1 Relay
Compressor B2 Relay
TEST HEATING
Requested Heat Stage
Heat Relay 1
Heat Relay 2
Relay 3 W1 Gas Valve 2
Relay 4 W2 Gas Valve 2
Relay 5 W1 Gas Valve 3
Relay 6 W2 Gas Valve 3

RANGE
ON/OFF
YES/NO
YES/NO
YES/NO
YES/NO

UNITS

POINT
MAN CTRL
UNIT-STOP
SOFTSTOP
SFANFORC
FILT4CHG
ECONCTST
ECONPTST
ECON CAL
PE A TST
PE-BTST
PE C TST
HIR TST
ALR-MTST

ON/OFF
ON/OFF
ON/OFF
0-100
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
O-MAX
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

3O

%
I

I

SGVF-DTST
CNDA TST
SFAN
CNDB TST
TST

CMPA2TST
MLV TST
CMP-B1TST
CMPA1TST
CMPB2TST
HTST TST
HSl TST
HS2 TST
HS3TST
HS4 TST
HS5 TST
HS6TST

WRITE STATUS
config
forcible
forcible

THIRD

PARTY CONTROL

A 4 to 20 mA input that can reduce or limit capacity linearly to
a set point percentage.
In either case, it will be necessary to install a controls expansion module (CEM).
DEMAND LIMIT DISCRETE INPUTS -- First, set DM.L.S
in (bnfiguration-+DMD.L
to 1 (2 switches).
When Inputs-cGEN.I-cDL.S1
(Demand Switch no. 1) is
OFF, the control will not set any limit to the capacity, and
when ON, the control sets a capacity limit to the Configuration--cDMD.L -¢D.L.S1 set point.
Likewise, when Inputs-cGEN.I-cDL.S2
(Demand Switch
no. 2) is OFF, the control will not set any limit to the capacity,
and when ON, the control sets a capacity lflnit to the Configuration--cDMD.L--cD.L.S2 set point.
If both switches are ON, Inputs-cGEN.I-cDL.S2
is used
as the limiter of capacity.
Under (bnfiguration--cSW..LG set the logic state appropriately for the action desired. Set the DL1.L and DL2.L configurations. They can be set normally open or normally closed. For
example, ifDL1.L is set to OPEN, the user will need to close
the switch to cause the control to limit capacity to the demand
limit 1 set point. Likewise, if DL1.L is set to CLSE (closed),
the user will need to open the switch to cause the control to
limit capacity to the demand limit 1 set point.
DEMAND LIMIT 4 TO 20 mA INPUT -- Under (bnfiguration--cDMD.L, set configuration DM.L.S to 2 (2 = 4 to
20 mA control). Under the same menu, set D.L.20 to a value
from 0 to 100% to set the demand lflnit range. For example,
with D.L.20 set to 50, a 4 mA signal will result in no limit to
the capacity and 20 mA signal will result in a 50% reduction in
capacity.

Thermostat

E The method of control would be through
the thermostat inputs:
Y1 = first stage cooling
Y1 and Y2 = first and second stage cooling
Wl = first stage heating
Wl and W2 = first and second stage heating
G = supply fan

Alarm Output

E The alarm output TB4-7 and 8, will provide relay closure whenever the unit is under an alert or alarm
condition.

Remote Switch

_ The remote switch may be configured
for three different functions. Under Configuration --+UNIT, set
RM. (T" to one of the following:
0 = no remote switch
1 = occupied/unoccupied
switch
2 = start!stop switch
3 = occupancy ovemde switch
With RM. CF set to 1, no time schedules are followed and
the unit follows the remote switch only in determining the state
of occupancy.
With RM. CF set to 2, the remote switch can be used to shut
down and disable the unit, while still honoring tflne guards on
compressors. Time schedules, internal or external, may be run
simultaneously with this configuration.
With RM.CF set to 3, the remote input may override an
unoccupied state and force the control to go into occupied
mode. As with the start/stop configuration, an internal or external time schedule may continue to control occupancy when the
switch is not in effect.

Demand

Under (bnfiguration-+SW.LG---_RMI.L,
the remote occupancy switch can be set to either a normally open or normally
closed switch input. Normal is defined as either unoccupied, start
or "not currently overridden,"
respective
to the RM.CF
configuration.

Controlled

Ventilation

There are multiple methods for externally
omizer damper.

Control

controlling the econ-

IAQ DISCRETE 1NPUT CONFIGURATION-crete input configuration requires a CEM module
be installed and an interface to a switch input at
The state of the input on the display can
Inputs --)AIR. Q--+IA Q.I.

VFD Control

_ On VFD equipped supply fans, supply
duct static pressure control may be left under unit control or be
externally controlled. To control a VFD externally with a 4 to
20 mA signal, set SRRS to 4, under the Configuration--+SP
menu. This will set the reset to VFD control. When SRRS = 4,
the static pressure reset function acts to provide direct VFD
speed control where 4 mA = 0% speed and 20 mA = 100%
(SRMN and SRMX will ovemde).
Note that SRCF must be
set to 1 (VFD Control) prior to configuring SRRS = 4. Failure
to do so could result in damage to ductwork due to overpressurization. In effect, this represents a speed control signal "pass
through"
under
normal
operating
circumstances.
The
(bnfortLink
controller ovemdes the third party signal for critical operation situations, most notably smoke and fire control.
Wire the input to the controls expansion module (CEM) using
TB-11 and 12. An optional CEM board is required.

The IAQ dis(optional) to
TB5-6 and 7.
be found at

Before configuring the switch functionality, first determine
how the switch will be read. A closed switch can indicate either
a low IAQ condition or a high IAQ condition. This is set at
Configuration-+SW.LG
and IAQ.L. The user can set what a
low reading would mean based on the type of switch being
used. Setting IAQ.L to OPEN means that when the switch is
open the input will read LOW. When the switch is closed, the
input will read HIGH. Setting IAQ.L to CLSE (closed) means
that when the switch is closed the input will read LOW, and
therefore, when the switch is open the switch will read HIGH.
There are two possible configurations for the IAQ discrete
input. Select item (bnfiguration--clAQ--)AQ.CF--clQ.LC
and configure for either 1 (IAQ Discrete) or 2 (IAQ Discrete
Override).

See Appendix C and the VFD literature supplied with the unit
for VFD configurations and field wiring connections to the VFD.

IQ.L C = 1 (IAQ Discrete) -- If the user sets IQ.L C to 1 (IAQ
Discrete), and the switch logic ((bnfiguration--cSW.LG--€
IAQ.L) is set to OPEN, then an open switch reads low and a
closed switch reads high.

Supply Air Reset

-- With the installation of the CEM,
the (_mfortLink
controller is capable of accepting a 4 to
20 mA signal, to reset the supply-air temperature up to a maximum of 20 E See VFD Control section above.

If the switch is open, the economizer will be colmnanded
the IAQ Demand Vent Minimum Position.

Demand

Limit Control _ The term "demand limit
control" refers to the restriction of the machine's mechanical
cooling capacity to control the amount of power that a machine
may use.
Demand limiting using mechanical control is possible via two
means:

to

These settings may be adjusted and are located at (bnfiguration --+IAQ--+DC V.C-+IA Q.M.
If the switch is closed, the IAQ reading will be high and the
economizer will be colmnanded to the Economizer Minimum
Position.
This setting may be adjusted and is located
tion --dA Q --cDC V.C-cE C MN.

Two discrete inputs tied to demand lhnit set point percentages.
OR
31

at Configura-

IQ.LC = 2 (IAQ Discrete Override) -- If the user sets IQ.LC
to 2 (IAQ Discrete Override), and Configuration-+SW..LG-+
IAQ.L is set to OPEN, then an open switch reads low and a
closed switch reads high.

The 4 to 20 mA signal from the sensor wired to TB5-6 and
7 is scaled to an equivalent indoor CO 2 (IAQ) by the parameters IQ.R.L
and IQ.R,H
located under the (bnfiguration
-+IAQ-+AQ.S.R
menu. The parameters are defined such that
4 mA = IQ.R,L and 20 mA = IQ.R.H. When the differential air
quality DAQ (IAQ - OAQ. U) exceeds the DAQ.H set point
((bnfiguration---_IAQ---_AQ.SP
menu) and the supply fan is
on, the economizer lnmimum vent position ((bnfiguration
--¢IAQ-+DCV.C--cECMN)
is overridden and the dmnper is
moved to the IQ.RO configuration. When the DAQ falls below
the DAQ.L set point ((bnfiguration--+IAQ
-+AQ.SP menu),
the economizer damper is moved back to the lninimum vent
position (E(:MN).

If the switch reads low, no action will be taken. If the switch
reads high, the economizer will ilrnnediately be colmnanded to
the IAQ Economizer Override Position. This can be set from 0
to 100% and can be found at (bnfiguration--+IAQ---)AQ.SP--+

iQ.O.P
FAN CONTROL
FOR THE IAQ DISCRETE
INPUT
-Under Configuration--clAQ--)AQ.CF
the IQ.LF (IAQ Discrete Input Fan Configuration)
must also be set. There are
three configurations for IQ.LF Select the configuration which
will be used for fan operation. This configuration allows the
user to decide (if the supply fan is not already running),
whether the IAQ discrete switch will start the fan, and in which
state of occupancy the fan will start.
IQ.LF

= 0

IQ.LF

= 1

IQ.LF

= 2

Minflnum Position Override
will not start fan
Minflnum Position Override
will start fan in occupied mode
Minflnum Position Override
will start fan in both occupied
pied modes

Switch

NOTE: Configuration OAQ. U is used in the calculation of the
trip point for ovemde and can be found under (bnfiguration--c lAQ--cAQ.SP.
IQ.A. C = 3 (4 to 20 mA Damper Control) -- This configuration will provide full 4 to 20 mA remotely controlled analog input for economizer minimum dmnper position. The 4 to 20 mA
signal is connected to terminals TB5-6 and 7. The input is
processed as 4 mA = 0% and 20 mA = 100%, thereby giving
complete range control of the effective minimum position.

input

Switch input
only
Switch input
and unoccu-

The economizer sequences can be disabled by setting Confignration-+ECON-+E.SEL
to 0. Complete control of the
economizer damper position is then possible by using a 4 to
20 mA economizer
minimum position control or a 0 to
10 kilo-otnn 0 to 100% economizer minimum position control
via configuration decisions at Configuration--+IAQ--+AQ.
CF
-+IQ.A. C

IAQ ANALOG INPUT CONFIGURATION -- This input is
an analog input located on the mare base board (MBB). There
are 4 different functions for this input. The location of this configuration is at Configuration--clAQ-+AQ. CF-clQ.A. C
The functions possible for IQ.A. C are:
• 0 = no IAQ analog input
• 1 = IAQ analog input
• 2 = IAQ analog input used to override to a set position
• 3 = 4 to 20 mA 0 to 100% economizer minimum position
control
• 4 = 0 to 10 kilo-ohms 0 to 100% economizer minimum
position control
Options 2, 3, and 4 are dedicated for third party control.
IQ.A. C = 2 (IAQ Analog Input Used to Override) -- Under
Configuration--clAQ--cAQ.SP, set IQ.O.P (IAQ Economizer
Override Position). The IQ.O.P configuration is adjustable
from 0 to 100%. These configurations are also used in conjunction with (bnfiguration --€IAQ--cA Q.CF--clQ.A. F (IAQ 4 to
20 mA Fan Configuration). There are three configurations for
IQ.A.F and they follow the same logic as for the discrete input.
This configuration allows the user to decide (if the supply fan is
not already running), if the IAQ Analog Minimum Position
Override input will start the fan, and in which state of occupancy the fan will start.
IQ.A.F = 0
IQ.A.F = 1
IQ.A.F = 2

IQ.A. C = 4 (10 Kilo-ohm Potentiometer
Damper Control)
-- This configuration will provide input for a 10 kilo-otnn linear potentiometer that acts as a remotely controlled analog mput for economizer minimum damper position. The input is
processed as 0 otnns = 0% and 10,000 otnns = 100%, thereby
giving complete range control of the effective minimum
position.

CONTROLS

Modes E The

(_olIlfoplgink
TM
controls operate under a
hierarchy of COlrnnand structure as defined by three essential
elements: the System mode, the HVAC mode and the Control
mode. The System mode is the top level mode that defines three
essential states for the control system: OFF, RUN and TEST.
The HVAC mode is the functional level underneath the
System mode which further defines the operation of the
control. The mode selection process is shown in Appendix D.
The Control mode is essentially the control type of the unit
((bnfigurafion--cUNIT--cCTYP).
This defines from where
the control looks to establish a cooling or heating mode and
whether 2 stages or multiple stages of cooling capacity operation are controlled.

IAQ analog sensor input cannot start the
supply fan
IAQ analog sensor input can start the supply
fan in occupied mode only
IAQ analog sensor input can start the supply
fan in both occupied and unoccupied modes

Furthermore,
there are a number of modes which operate
concurrently when the unit is running. The operating modes of
the control are located at the local displays under Operating
Modes. See Table 42.

If IQ.A.F is configured to request the supply fan, then
configurations D.EON and D.EOF need to be set. These
configuration settings are located under Confignration---_
IAQ--)AQ.SP and configure the fan override operation based
on the differential air quality (DAQ). If DAQ rises above
D.EON, the control will request the fan on until DAQ falls below D.EOF
NOTE: IfD.EON
is
occupied mode, and
D.EON
and the fan
economizer minhnum

OPERATION

Currently Occupied (OC() -- This variable
rent occupied state of the unit.

displays the cur-

Timed Override in Effect (T.OVR) -- This variable displays
if the state of occupancy is currently occupied due to an
override.

DCV Resetting Minimum Position (DCV) -- This variable
displays if the economizer position has been lowered from its
maxhnum vent position.

configured below DAQ.H, the unit is in
the fan was off, then DAQ rose above
came on, the economizer will go to the
position (EC.MN).

32

Table 42 -- Operating Modes Display Table
ITEM
SYS.M
HVAC
CTRL
MODE
OCC
T.OVR
DCV
SA.R
DMD.L
T.C.ST
IAQ.P
LINK
LOCK
H.NUM

EXPANSION

RANGE

ascii string
ascii string
ascii string
MODES CONTROLLING UNIT
Currently Occupied
Timed Override in Effect
DCV Resetting Min Pos
Supply Air Reset
Demand Limit in Effect
Temp.Compensated
Start
IAQ Pre-Occ Purge Active
Linkage Active -- CCN
Mech.Cooling Locked Out
HVAC Mode Numerical Form

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
number

CCN
n/a
n/a
n/a

("Internal

System Mode Test -- When the systeru mode is Test, the control is lhnited to the Test mode and is controllable via the local
displays (scrolling marquee
and Navigator TM display) or
through the factory service test control. The System Test
modes are Factory Test Enabled and Service Test Enabled. See
the Service Test Mode section for details on test control in this
mode.

POINT

MODEOCCP
MODETOVR
MODEADCV
MODESARS
MODEDMLT
MODETCST
MODEIQPG
MODELINK
MODELOCK
MODEHVAC

1. Factory Test mode
2.

("Service

Demand Limit in Effect (DMD.L) -- This variable displays
if the mechanical cooling capacity is currently being limited or
reduced by an outside third party.
Temperature
Compensated
Start (T.CST)
-- This variable
displays if Heating or Cooling has been initiated before the
occupied period to pre-condition the space.

2.

Mechanical Cooling Locked Out (LOCK) -- This variable
displays if mechanical cooling is currently being locked due to
low outside air teruperature.
HVAC Mode Numerical Forru (H.NUM) -- This is a numerical representation of the HVAC modes which may be read via
a point read.
Modes--cSYS.M)

HVAC Mode -- SHUTTING
DOWN (2) -- The unit is transitioning froru a mode to the OFF mode.

("Shutting
3.

4.

6.

HVAC Mode -- REM SW.DISABLE
due to the reruote switch.

(internal

factory

control

level

The unit is off

The unit is off

HVAC Mode -- COMRSTUCK
ON (7) -- The unit is shut
down because there is an indication that a compressor is running even though it has been colrnnanded off.

Stop")

Fire shut down (traumatic fire shutdown condition based
on the Fire Shutdown InputInputs'--+FIRE-+FSD).

HVAC Mode -- OFF (8) -- The unit is off and no operating
modes are active.

("Fire-Shutdown

HVAC Mode -- TEST (9) -- The unit is in the self test mode
which is entered through the Service Test menu.

Mode")

Eruergency stop, which is forced over the CCN through
the Eruergency Stop Variable (EMSTOP).

HVAC Mode -- TEMPERING
VENT (10) -- The econolnizer is at ruinhnuru vent position but the supply-air teruperature has dropped below the terupering vent set point. Staged
gas heat is used to teruper the ventilation air.

Stop")

Startup delay.

HVAC Mode -- TEMPERING
LOCOOL (11) -- The economizer is at minimum vent position but the combination of the
outside-air
teruperamre
and the economizer
position
has
dropped the supply-air temperature below the tempering cool
set point. Staged gas heat is used to teruper the ventilation air.

Service test ending transition timer.
("Service

9.

The unit is

HVAC Mode -- STATIC PRESSURE FAIL (6) -- The unit is
off due to failure of the static pressure sensor.

("Startup delay = 0-900 secs")
8.

(4) --

HVAC Mode -- FAN STATUS FAIL (5) -due to failure of the fan status switch.

--

Unit stop (software application level variable that acts as
a hard shut down -- Service Test-+STOP).

("CCN Eruergency
7.

and

Shut Down")

("Local Machine
5.

down compressors

Down...")

Factory shut down
SHUTDOWN).
("Factory

HVAC Mode -- SOFTSTOP REQUEST
(3) -off due to a soft stop request froru the control.

Systeru ...")

Systeru in the process of shutting
waiting for thneguards to expire.

is transi-

HVAC ModeDISABLED
(1) -- The unit is shut down
due to a software colmnand disable through the scrolling marquee, a CCN emergency stop colrnnand, a service test end, or a
control-type change delay.

1. Wake up thner on a power reset.
2.

Control")

HVAC Mode -- STARTING UP (0) -- The unit
tioning froru the OFF 1node to a different mode.

Svsteru Mode Off-When the system mode is OFF, all outputs are to be shut down and no machine control is possible.
The following list displays the text assigned to the System
Mode when in the OFF mode and the conditions that may
cause this mode are checked in the following hierarchal order:
("Initializing

("Unit Operation Enabled")
Fire-Sruoke control mode

HVAC MODES (Operating Mode-+HVAC)
-- The system
mode must be selected before the unit controls can select the
HVAC mode of the rooftop unit. The selection of an HVAC
mode is based on a hierarchal decision making process. Certain
overrides may interfere with this process and the norrual teruperamre/huruidity
control operation of the unit. The decision
making process that deterruines the HVAC 1node is shown in
Fig. 4 and Appendix D.
Each HVAC Mode is described below. The HVAC mode
number is shown in parenthesis after the mode.

Linkage Active CCN (LINK) -- This variable displays if a
linkage master in a zoning system has established "linkage"
with this air source (rooftop).

(Operating

test enabled")

("Fire-Sruoke

IAQ Pre-Occupanc¥
Purge Active (IAQ.P) -- This variable
displays if the economizer is open and the fan is on to preventilate the building before occupancy.

MODES

("Factory test enabled")
Service Test mode

System Mode Run -- When the systeru mode is Run, the software application in the control is free to run the HVAC control
routines by which cooling, heating, IAQ, etc., is possible. There
are two possible text displays for this 1node, one is norrual run
mode and the other occurs if one of the following fire-sruoke
modes is present: sruoke purge, pressurization or evacuation.
1. Norrual run thne state

Supply Air Reset (SA.R) -- This variable displays if the supply air reset is currently active. This applies to cooling only.

SYSTEM

Failure")

Test Ending")

Unexplained

internal software failure.

33

Unit not in factory
ANDfi ......... ke_

I_._l_st

contlol

FireSmoke

System
Mode

No

mode is_

Control_

__

j

hpu,s->
FIRE
->_

,opofs-.
F,RE-.
_o

PRES

EVAC

in alarm?

in alarm?

J.
=
I
(PressunzatEon)
..........................................................
//

',
\

=

"

/

HVAC

Mode

,;GENJ->

Yes

15=second

delay

HVAC

Mode

= TEST

_

....

/
I..\

HVAC

Mode

= OFF

!HVAC

_

Mode = So

',\\.

S op

Request

'.j

..'

HVAC

Mode

\

(Rem.

Sw.

_

j

........................................
_
_C°nflg-_S_>2"_

"

_

.°&,.,o'-;,o_
.....

___

Unit control

, _s

.......
\'
Mode ;: OFF

HVAC

(Static

free

Pres

Fail)

_/

C.on_g;>UN,T;>

"

-'_o

_,Ves

= OFF

_.

Fail)

(Fan Status

-

.

/ ..........
HVAC Mode

.'

..............

_Unitjust

._,%_,%4

waking

u p_No_Hn

from
p........ t'_

,_

/' .....
HVAC Mode

;:: OFF

_--/

',\_

Up)

rlown_

- .........
-/..................

.

"\

(Starting

. _h,,t,inr_

....

\'.

AHVAC

_/

,_
Mode

_

,_

;:: Shu

ng

Down

_'

to select

normal heating/cooling
HVAC mode

HVAC

Mode

= OFF

'\\

J
.//'

/-" ..........................................................
.\\
ll_

HVAC

Mode

= Vent

/ .............................................................
\\
/
HVAC Mode =
"
_I

Tempering

\

Vent

,)

.........................................................
/
,/" ....
HVAC

/f
,'

Unit
control free
to choose
HVAC
Mode

"1
._/

"

(Disabled)

/
'

;< OFF
Disable)

HVAC Mode =
•
Tempering
LoCool

_"

Cool

__

HVAC
Tempering

Mode

=

\',

HiCool

_4'\HVAC
'

Mode = High

Cool }
__.'

1_'(',HVAC

Mode

Heat

J

,\

/,
= Low

\.
',

}

"_
J

)

\ ....

,_

\

Mode = Low

"-\

C ompressor

Stuck

On

/'
_'_ HVAC

,'
_',

Fig. 4-

Mode Selection

34

}

.jl'

HVAC

Mode = High

Heat'

Mode = Unocc,
Free Cool

',,

accurate return-air temperature before the return-air temperamre is allowed to call out any mode.
• C TYP = 3 (TSTAT-MULTI)
This configuration will force the control to monitor the thermostat inputs to make a determination of mode. Unlike
traditional 2-stage thermostat control, the unit is allowed to
use multiple stages of cooling control and perform VAVtype operation. The control will be able to call out a LOW
COOL or a HIGH COOL mode and maintain a low or high
cool supply air set point.
• C. TYP = 4 (TSTAT-2 STG)
This configuration will force the control to monitor the thermostat inputs to make a determination of mode and allow
only 2 stages of control for both heating and cooling.
• C. TYP = 5 (SPT-MULTI)
This configuration will force the control to monitor a space
temperature sensor to make a determination of mode.
Unlike traditional 2-stage space temperature control, the
unit is allowed to use multiple stages of cooling control and
perform VAV-type operation. The control will be able to call
out a LOW COOL or a HIGH COOL mode and maintain a
low or high cool supply air set point.
• C. TYP = 6 (SPT-2 STG)
This configuration will force the control to monitor the
space temperature sensor to make a determination of mode
and allow 2 stages of control for both heating and cooling.
FAN MODE (CV..FN) -- The Fan Mode configuration can be
used
for
machine
control
types
(Configuration--€
UNIT_CTYP)
3, 4, 5, and 6. The Fan Mode variable
establishes the operating sequence for the supply fan during
occupied periods. When set to 1 (Continuous), the fan will
operate continuously during occupied periods. When set to 0
(Automatic), the fan will run only during a heating or cooling
mode.

HVAC Mode -- TEMPERING
HICOOL (12) -- The economizer is at minimum vent position but the combination of the
outside-air
temperature
and the economizer
position
has
dropped the supply-air temperature below the tempering cool
set point. Staged gas heat is used to temper the ventilation air.
HVAC ModeVENT (13) -- This is a normal operation
mode where no heating or cooling is required and outside air is
being delivered to the space to control IAQ levels.
HVAC Mode -- LOW COOL (14) -- This is a normal
ing mode where a low cooling demand is required.

cool-

HVAC Mode -- HIGH COOL (15) -- This is a normal cooling mode where a high cooling demand is required.
HVAC Mode -- LOW HEAT (16) -- The unit will be in low
heating demand mode using either gas or electric heat.
HVAC Mode -- HIGH HEAT (17) -- The unit will be in
high heating demand mode using either gas or electric heat.
HVAC Mode -- UNOCC. FREE COOL (18) -In this
mode the unit will operate in cooling but will be using the
economizer for free cooling. Entering this mode will depend on
the stares of the outside air. The unit can be configured for outside air changeover, differential dry bulb changeover, outside
air enthalpy changeover, differential enthalpy changeover, or a
custom arrangement
of enthalpy/dewpoint
and dry bulb. See
the Economizer section for further details.
HVAC Mode -- FIRE SHUT DOWN (19) -- The unit has
been stopped due to a fire shutdown input (FSD) or two or
more of the fire control modes, purge, evacuation, or pressurization have been requested shnultaneously.
HVAC Mode -- PRESSURIZATION
(20) -- The unit is in
the special fire pressurization mode where the supply fan is on,
the economizer damper is open and the power exhaust fans are
off. This mode is started by the Fire Pressurization (PRES) input which can be found in the INPUT---)FIRE
sub-menu.
HVAC ModeEVACUATION
(21) -- The unit is in the
special Fire Evacuation mode where the supply fan is off, the
economizer damper is closed and the power exhaust fans are
on. This mode is started by the Fire Evacuation (EVA() input
which can be found in the INPUT---_FIRE
sub-menu.

REMOTE SWITCH CONFIG (RM.CF) -- The remote switch
input is connected to TB6 terminals 1 and 3. This switch can be
used for several remote control functions. Please refer to the
Remote Control Switch Input section for details on its use and
operation.

HVAC Mode -- SMOKE PURGE (22) -- The unit is in the
special Fire Purge mode where the supply fan is on, the economizer damper is open and the power exhaust fans are on. This
mode is started by the Fire Evacuation (PURG) input which
can be found in the INPUT---_FIRE
sub-menu.

CEM MODEL INSTALLED (CEM) -- This configuration instructs the control to co_rnnunicate with the controls expansion
module (CEM) over the Local Equipment Network (LEN) when
set to Yes. When the unit is configured for certain sensors and
configurations, this option will be set to Yes automatically.

HVAC Mode -- DEHUMIDIFICATION (23) -- The unit is
operating in Dehumidification mode.
HVAC ModeREHEAT (24) -- The unit is operating in
reheat mode.

The sensors
this board are:

Unit Configuration
Submenu E The UNIT submenu under the Configuration mode of the local display
contains general unit configuration items. The sub-menu which
contains these configurations is located at the local display under Configuration--+UNIT. See Table 43.
Machine Control Type (C TYP) -- This configuration defines the control type and control source responsible for selecting a cooling, heating, or vent mode and in determining the
method by which compressors are staged. The control types
are:

and configurations

that automatically
1 (Supply

turn on

Configuration--cUNIT-+SFS.M
Switch Monitoring)

=

Fan

Stares

Configuration-+EDT.R-+RES.S
ply Air Reset Sensor Enable)

= Enable (4 to 20 mA Sup-

Configuration--+DMD.L
-+DM.L.S
= 1 (2
(Demand Limiting using 2 discrete switches)

SWITCHES)

Configuration-+DMD.L--cDM.LS
= 2 (4-20
(Demand Limiting using a 4 to 20 mA sensor)

MA

(bnfiguration--)IAQ--)AQ.CF-clQ.LC=
(IAQ discrete switch control)

CTRL)

1 (IAQ DISCRETE)

(bnfiguration--clAQ---)AQ.
(T--clQ.L C = 2 (IAQ DISC.OVR)
(IAQ discrete switch "override" control)

C TYP = 1 (VAV-RAT) and C TYP = 2 (VAV-SPT)
Both of these configurations refer to standard VAV operation. If the control is occupied,
the supply fan is run
continuously and return-air temperature will be used in the
determination of the selection of a cooling mode. VAV-SPT
differs from VAV-RAT only in that during the unoccupied
period, space temperature will be used instead of return-air
temperature to start the fan for 10 minutes to establish an

(bnfiguration--clAQ--cAQ.(T_OQ.A.C
DAQ) (Outdoor Air Quality Sensor)
(bnfiguration--clAQ--cAQ.(T_OQ.A.C
DAQ) (4 to 20 mA sensor, no DAQ)

= 1 (OAQ
=

2

SENS-

(4-20

NO

Temperature
Compensated
Start Cooling Factor (TCS.() -This factor is used in the equation of the Temperature Compensated Start Time Bias for cooling. Refer to the Temperature
35

Compensated
Startsection
formoreinformation.
A setting
0 minutes indicates Temperature
is not permitted.

Compensated

of
Start in Cooling

Suction Pressure Transducer Type (SRXR) -- This configuration specifies the type of suction pressure transducer that is
being used. Set SRXR to 0 for support of a pressure transducer
with a range of 0 to 135 psig. Set SRXR to 1 for support of a
pressure transducer with a range of 0 to 200 psig.

Temperature Compensated
Start Heating Factor (T(_.H)
-This factor is used in the equation of the Temperature Compensated Start Time Bias for heating. Refer to the Temperature
Compensated Start section for more information. A setting of
0 minutes indicates Temperature Compensated Start in Heating
is not permitted.

NOTE: The 48/50A2,A3,A4,A5
units do not require a change
to the SRXR factory default setting.
Refrigerant Type (RFG 7") -- This configuration
type of refrigerant used in the unit. Configuration
to 0 if the refrigerant used is R-22. Configuration
to 1 if the refrigerant used is R-410A. Do not
setting.

Fan Fail Shuts Downs Unit (SFS.S)
-- This configuration
will determine whether the unit should shut down on a supply
fan status fail or simply alert the condition and continue to run.
If set to YES, then the control will shut down the unit and send
out an alarm if supply fan status monitoring fails. If set to NO,
the control will not shut down the unit if supply fan status monitoring fails but the control will send out an alert.
Fan Status Monitoring (SFS.M) -- This configuration
the type of fan status monitoring to be performed.

Condenser Type (CND./3 -- This configuration specifies the
type of condenser installed in the unit. Configuration CND. T is
set to 0 if the condenser is a round tube, plate fin coil (RTPF).
Configuration
CND. T is set to 1 if the condenser is a microchannel heat exchanger coil (MCHX).

selects

MAT Calc Config (MAI:S) -- This configuration gives the
user three options in the processing of the mixed-air temperature (MAT) calculation:
• MAT.S = 0

0 - NONE -- No switch or monitoring
1 - SWITCH --Use
of the fan status switch
2 - SP RISE -- Monitoring

specifies the
RFG T is set
RFG T is set
change this

of the supply duct pressure.

There will be no MAT calculation.

VAV Unoccupied
Fan Retry Time (VAES) -- Machine control types 1 and 2 (VAV-RAT, VAV-SPT) monitor the return-air
temperature during unoccupied periods to determine if there is
a valid demand for heating or cooling before initiating an unoccupied heating or cooling mode. If the routine runs but concludes a valid demand condition does not exist, then the process is not permitted for the period of time defined by this configuration. Reducing this value allows a more frequent resampling process. Setting this value to zero will prevent any
sampling sequence.

•

MA_S=I
The control will attempt to learn MAT over time. Any time
the system is in a vent mode and the economizer stays at a
particular position for long enough, MAT is set to equal
EDT. Using this, the control has an internal table whereby it
can more closely determine the true MAT value.
MAT.S = 2
The control will not attempt to learn MAT over time.
To calculate MAT linearly, the user should reset the MAT
table entries by setting MAT.R to YES. Then set MAT.S = 2.
The control will calculate MAT based on the position of the
economizer,
outside-air
temperature,
and
return-air
temperature.

Unit Size (SIZE) -- There are several unit sizes (tons) for the
A Series control. Make sure this configuration matches the size
called out by the model number of the unit. This is important as
the cooling stage tables are directly determined based on this
configuration.
Discharge Pressure Transducers (DRXR)-This configuration
configures the unit for use with discharge pressure transducers.
The 48/50A2,A3,A4,A5
units will be automatically configured
for discharge pressure transducers and DRXR should be set to
Yes.

To freeze the MAT table entries, let the unit run withMAr.S
= 1. Once sufficient data has been collected, change MAT.S
= 2. Do not reset the MAT table.

Table 43 -- Unit Configuration
ITEM
UNIT
C.TYP
CVFN
RM.CF
CEM
TCS.C
TCS.H
SFS.S
SFS.M
VAVS
SIZE
DP.XR
SP.XR
RFG. T
CND. T
MAT.S
MAT.R
MAT.D
ALTI
DLAY
STAT
AUX.R
SENS
SPT.S
SP.O.S
SP.O.R
RRH.S
FLT.S

EXPANSION
UNIT CONFIGURATION
Machine Control Type
Fan Mode (O=Auto, l=Cont)
Remote Switch Config
CEM Module Installed
Temp.Cmp.Strt.Cool
Factr
Temp.Cmp.Strt.Heat
Factr
Fan Fail Shuts Down Unit
Fan Stat Monitoring Type
VAV Unocc.Fan Retry Time
Unit Size (20-60)
Discharge Press. Transducers
Suct. Pres. Trans. Type
REFRIG: 0=R22, 1=R410A
CND HX TYP: O=RTPE I=MCHX
MAT Calc Config
Reset MAT Table Entries?
MAT Outside Air Default
Altitude ........ in feet:
Startup Delay Time
TSTAT-Both Heat and Cool
Auxiliary Relay Config
INPUT SENSOR CONFIG
Space Temp Sensor
Space Temp Offset Sensor
Space Temp Offset Range
Return Air RH Sensor
Filter Stat.Sw.Enabled ?

[

RANGE
1-6
0-1
0-3
Yes/No
0 - 60
0 - 60
Yes/No
0-2
0 - 720
20 - 60
Yes/No
0-1
0-1
0-1
0-2
Yes/No
0-1 O0
0 - 60000
0 - 900
Yes/No
0-3
Enable/Disable
Enable/Disable
1 -10
Enable/Disable
Enable/Disable

36

I

UNITS

min
min

min

%
sec

[

CCN POINT

I

DEFAULTS

CTRLTYPE
FAN MODE
RMT/NCFG
GEM BRD
TCSTCOOL
TCSTHEAT
SFS SHUT
SFS MON
SAMPMINS
UNITSIZE
DP TRANS
SPXRTYPE
REFRIG T
COILTYPE
MAT SEL
MATRESET
MATOADOS
ALTITUDE
DELAY
TSTATALL
AUXRELAY

4
1
0
No
0
0
No
0
50
20
No
0
Unit dependent
Unit dependent
1
No
20
0
0
No
0

SPTSENS
SPTOSENS
SPTO RNG
RARH-SENS
FLTS_ENA

Disable
Disable
5
Disable
Disable

Reset MAT Table Entries? (MAT.R) -- This configuration
allows the user to reset the internally stored MAT learned configuration data back to the default values. The defaults are set
to a linear relationship between the economizer damper position and OAT and RAT in the calculation of MAT.

mechanical cooling to allow for the greatest use of flee cooling. When both mechanical cooling and the economizer are
being used, the control will use the economizer to provide better temperature control and limit the cycling of the compressors. The control also checks on various other operation
parameters in the unit to make sure that safeties are not
exceeded and the compressors are reliably operated.

MAT Outside Air Position Default (MAT.D) -- This configuration is used to calculate MAT when the economizer option
is disabled. The configuration is adjustable from 0 to 100%
outside air. This defines the fixed ventilation position that will
be used to correctly calculate MAT.

The A Series (_mforlLink TM control system offers two basic control approaches to mechanical cooling. Constant volume
operation for 2 stages of cooling or VAV operation for multiple
stages of cooling. In addition to these methods of control, the A
Series (_,_fortLink
control offers the ability to mn multiple
stages of cooling for either a space temperature sensor or thermostat by. controlling the unit to either a low or high cool
supply
air set point. The control
type
Configuration
--gUNIT_:
TYP) determines the selection of the type of cooling control as well as the method for selecting a cooling mode.

Altitude ........ In Feet: (ALTI) -- The control does not include a barometric pressure sensor to determine altitude. The
altitude must be defined the calculation of enthalpy and cfm.
The altitude parameter is used to set up a default barometric
pressure for use with calculations. The effect of barometric
pressure in these calculations is not great, but could have an effect depending on the installed elevation of the unit. If the unit
is installed at a particularly high altitude and enthalpy or cfm
are being calculated, set this configuration
to the current
elevation.

There are either three or four compressors divided among
two refrigeration circuits in the unit. Circuit A always contains
two compressors
(A1,A2). Circuit B has either one or two
compressors
(B1,B2). There may be a minhnum load valve
(MLV), which, if present, is only associated with circuit A. The
decision as to which compressor should be turned on or off is
decided by the compressor's
availability followed by a preferred staging order.

Start Up Delay Time (DLAY) -- This option delays the unit
from operating after a power reset. The configuration may be
adjusted from 0 to 900 seconds of delay.
TSTAT -- Both Heat and Cool (STAT) -- This option, if enabled, allows both heating and cooling requests to be made at
the same thne. If the unit is configured for staged gas heat, and
ifa cooling request is initiated (Y1 or Y2), then Wl initiates reheat and W2 initiates dehumidification.

NOTE: Configuration
of the machine control type (CTYP)
has no effect on whether a unit has a VFD or just a supply fan
installed for static pressure control. No matter what the control
type is, it is possible to mn the unit in either CV or VAV mode
provided there are enough stages to accolrunodate
lower air
volumes for VAV operation. Refer to the section on static pressure control for information on how to set up the unit for the
type of supply fan control desired.
SETTING UP THE SYSTEM

Auxiliary Relay Configuration
(AUX.R) -- This option configures the auxiliary relay on the MBB (RLYll). The function
of this relay is configurable in the following ways:
•
•
•

•

AUX.R = 0 (Alarm Output) -- The relay is used for remote
annunciation of an alarm state.
AUX.R = 1 (Dehum-Reheat)
-- The relay is used as a dehumidification!reheat
output.
AUX.R = 2 (Occup. State) -- The relay is used to reflect
occupancy. When the control is in occupied mode, the relay
will be ON. When the control is in unoccupied mode, the
relay will be OFE
AUX.R = 3 (S. Fan State) -- The relay is used to reflect the
supply fan colmnanded state. When the supply fan is on, the
relay will be ON. When the supply fan is off, the relay will
be OFF.

Space Temp Sensor (SPT.S)
is installed, this configuration

-- If a space temperature
should be enabled.

Machine Control Type (Configuration
--+UNIT _C. TYP) -The most important cooling control configuration is located
under Configuration --+UNIT.
This configuration defines the method and control source
responsible for selecting a cooling mode. The configuration
also determines the method by which compressors are staged.
Control types are:
•

C. TYP = 1 (VAV-RAT) and C TYP = 2 (VAV-SPT)
Both of these configurations refer to standard VAV operation. If the control is occupied, the supply fan is mn continuously and return-air temperature will be used for both in the
determination of the selection of a cooling mode. VAV-SPT
differs from VAV-RAT only in that during the unoccupied
period, space temperature will be used instead of return-air
temperature to start the fan for ten minutes before the
return-air temperature is allowed to call out any mode.

sensor

Space Temp Offset Sensor (SRO.S) -- If a space temperarare sensor with a space temperature offset slider is installed
(T56), this configuration should be enabled.
Space Temp Offset Range (SRO.R) -- If a space temperarare offset sensor is installed, it is possible to configure the
range of the slider by adjusting this range configuration.

•

Return RH Sensor (RRH.S) -- If a return air relative humidity sensor is installed, this configuration should be enabled.

C TYP = 3 (TSTAT-MULTI)
This configuration will force the control to monitor the the>
mostat inputs to make a determination of mode. Unlike traditional 2-stage thermostat control, the unit is allowed to use
multiple stages of cooling control and perform VAV style
operation. The control will be able to call out a LOW
COOL or a HIGH COOL mode and maintain a low or high
cool supply air set point.

Filter Status Switch Enabled? (FLT.S) -- If a filter stares
switch is installed, enable this configuration to begin the monitoring of the filter stares input (Inputs_GEN.I-+FLT.S).
See
the Dirty Filter Switch section for more details on installation
and operation.
•

COOling
COntrOl
-- When mechanical cooling is required,
the A Series (_,fortLink
TM
control system has the capability
to control the staging of the compressors in several different
ways. Three scroll compressors are used on sizes 020 to 027
and four on sizes 030 to 060. In addition, the (_,fortLink
control system supports the use of an optional minimum load
hot gas bypass valve (MLV) that is directly controlled by the
(_,fortLink
control system. This provides an additional stage
of capacity as well as low load coil freeze protection. The control also integrates the use of an economizer with the use of

C TYP = 4 (TSTAT-2 STG)
This configuration will force the control to monitor the the>
mostat inputs to make a determination of mode.

•

C. TYP = 5 (SPT-MULTI)
This configuration will force the control to monitor a space
temperature sensor to make a determination of mode. Unlike traditional 2-stage space temperature control, the unit is
allowed to use multiple stages of cooling control and perform VAV style operation. The control will be able to call

37

out a LOW COOL or a HIGH COOL mode and maintain a
low or high cool supply air set point.
• C. TYP = 6 (SPT-2 STG)
This configuration will force the control to monitor the
space temperature sensor to make a determination of mode
and allow two stages of cooling.
MACHINE DEPENDENT CONFIGURATIONS -- Some
configurations are linked to the physical unit and must not be

SUPPLY AIR RESET CONFIGURATION -- Supply Air
Reset can be used to modify the current cooling supply air set
point. Supply Air Reset is applicable to control types, C TYP =
1,2,3, and 5. The configurations for reset can be found at the
local display under Configuration--gEDT.R. See Table 46.
EDT Reset Configuration (RS. CF) -- This configuration applies to several machine control types (Configuration--9
UNIT_: TYP
1,2,3, and 5).
0 = NO RESET

changed. The configurations
are provided in case a field replacement of a board occurs and the settings are not preserved
by the download process of the new software. The following
configurations apply to all machine control types (C. TYP) except 4 and 6. These configurations are located at the local display under Configuration --+UNIT. See Table 44.

No supply air reset is in effect
1 = SPT RESET
Space temperature will be used as the reset control variable
along with both RTIO and LIMT in the calculation of the
final amount
of reset to be applied (Inputs-+RSET
-+SA.S.R).
2 = RAT RESET

Table 44 -- Machine Dependent Configurations

,T IO
UNIT

I

DEFAULTS

Return-air temperature will be used as the reset control variable along with both RTIO and LIMT in the calculation of
the final amount of reset to be applied (Inputs-+RSET--€
SA.S.R).
3 = 3RD PARTY RESET

[UNIT CONFIGURATION

RFG.T
[REFRIG
10-1
SIZE
[OnitSize(20-60)[20-60
CND.T ICND HX TYP
[0-1
*Dependent

IREFRIGT
IUNITSIZE
ICOILTYPE

[

The reset value is determined by a 4 to 20 mA third party
input. An input of 4 mA would correspond to 0° F reset. An
input of 20 mA would correspond to 20 ° F reset. Configuring the control for this option will cause RES.S to become
enabled automatically
with the CEM board. To avoid
alarms make sure the CEM board and third party input are
connected first before enabling this option.

on unit,

Unit Size (SIZE) -- There are several unit sizes (tons) for the
A Series control. Make sure this configuration matches the size
called out by the model number of the unit. This is important as
the cooling stage tables are directly determined based on this
configuration.

Reset Ratio (RTIO) -- This configuration is used when
RS.CF is set to 1 or 2. For every degree that the controlling
temperature (space/return) falls below the occupied cooling set
point (OCSP), the calculated value of the supply air reset will
rise by the number of degrees as specified by this parameter.
Reset Limit (LIMT) -- This configuration is used when
RS. CF is set to 1 or 2. This configuration places a clamp on the
amount of supply air reset that can be applied.
EDT 4-20 mA Reset Input (RES.S) -- This configuration is
automatically
enabled when
_bnfiguration--+EDT.R--+
RS. CF is set to 3 (third party reset).
COOLING CONFIGURATION-- Relevant configurations for
mechanical cooling are located at the local display under
Configuration _,COOL. See Table 47.

Refrigerant Type (RFG T) -- This configuration specifies the
type of refrigerant used in the unit. Configuration RFG T is set
to 0 if the refrigerant used is R-22. Configuration RFG T is set
to 1 if the refrigerant used is R-410A. Make sure this configuration matches the refrigerant called out by the model number
of the unit.
Condenser Type ((_WD. T) -- This configuration specifies the
type of condenser installed in the unit. Configuration (_WD. T is
set to 0 if the condenser is a round tube, plate fin coil (RTPF).
Configuration
(_WD. T is set to 1 if the condenser is a microchannel heat exchanger coil (MCHX). Make sure this configuration matches the condenser type called out by the model
number of the unit.

SET POINTS -- The set points for both cooling and heating
are located at the local display under Setpoints. See Table 45.

Table 45 -- Setpoints
ITEM
OHSP
OCSP
UHSP
UCSP
GAP
V.C.ON
V.C.OF
SA SP
SA.HI
SA.LO
SA.HT
T.PRG
T.CL
T.VOC
T.VUN

EXPANSION

RANGE
40-99
40-99
40-99
40-99
2-10
0-25
1-25
45-75
45-75
45-75
90-145
-20-80
5-75
-20-80
-20-80

Occupied Heat Setpoint
Occupied Cool Setpoint
Unoccupied Heat Setpoint
Unoccupied Cool Setpoint
Heat-Cool Setpoint Gap
VAV Occ. Cool On Delta
VAV Occ. Cool Off Delta
Supply Air Setpoint
Supply Air Setpoint Hi
Supply Air Setpoint Lo
Heating Supply Air Setpt
Tempering Purge SASP
Tempering in Cool SASP
Tempering Vent Occ SASP
Tempering Vent Unocc. SASP

UNITS
dF
dF
dF
dF
deltaF
deltaF
deltaF
dF
dF
dF
dF
dF
dF
dF
dF

CCN POINT
OHSP
OCSP
UHSP
UCSP
HCSP GAP
VAVOCON
VAVOCOFF
SASP
SASP_HI
SASP LO
SASP_IEAT
TEMPPURG
TEMPCOOL
TEMPVOCC
TEMPVUNC

DEFAULT
68
75
55
90
5
3.5
2
55
55
60
85
50
5
65
50

Table 46 -- Supply Air Reset Configuration
ITEM
EDT.R
RS.CF
RTIO
LIMT
RES. S

EXPANSION
EVAP.DISCHRGE TEMP RESET
EDT Reset Configuration
Reset Ratio
Reset Limit
EDT 4-20 ma Reset Input

I

RANGE
0 - 3
0 - 10
0 - 20
Enable/Disable

38

I UNITS ]
deltaF

CCN POINT

RTIO
LIMT
EDRSTCFG
EDTRSENS

]

DEFAULT

10
ODisable

Table
ITEM
COOL
Z.GN
MC.LO
C.FOD
MLV
M.M.
HPSP
A1.EN
A2.EN
B1.EN
B2.EN
CS.A 1
CS.A2
CS.B1
CS.B2
REVR
H.SST

EXPANSION
COOLING CONFIGURATION
Capacity Threshold Adjst
Compressor Lockout Temp
Fan-Off Delay, Mech Cool
Min. Load Valve (HGBP)?
Motor Master Control ?
Head Pressure Setpoint
Enable Compressor A1
Enable Compressor A2
Enable Compressor B1
Enable Compressor B2
CSB A1 Feedback Alarm
CSB A2 Feedback Alarm
CSB B1 Feedback Alarm
CSB B2 Feedback Alarm
Rev. Rotation Verified?
Hi SST Alert Delay Time

47 -- Cooling

I

RANGE

Configuration

I UNITSI

-10 - 10
-20 - 55
0-600
Yes/No
Yes/No
80 - 150
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Yes/No
5 - 30

dF
sec

dF

mln

CCNPOINT 1
Z_GAIN
OATLCOMP
COOL FOD
MLV S-EL
MOT-RMAST
HPSP
CMPA1ENA
CMPA2ENA
CMPB1ENA
CMPB2ENA
CSBA1EN
CSB_A2EN
CSB B1EN
CSB B2EN
REVR VER
HSSTTIME

DEFAULT

1
40

60
No
No
113
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
No
10 (48/50AJ,AK,AW, AY)
20 (48/50A2,A3,A4,A5)

Capacity Threshold Adiust (Z. GN) -- This configuration is
used for units using the "SumZ" algorithin for cooling capacity
control ((_bnfigurafion-+UNIT-+C
TYP = 1, 2, 3 or 5). The
configuration affects the cycling rate of the cooling stages by
raising or lowering the threshold that demand must rise above
in order to add or subtract a stage of cooling.

CSB A2 Feedback Alarm (CS.A2) -- This configuration
is
used to enable or disable the compressor A2 feedback alarm.
This configuration must be enabled at all times.

Normally this configuration should not require any tuning or
adjustment. If there is an application where the unit may be significantly oversized and there are indications of high compressor cycles, then the Capacity Threshold Adjust (Z. GN) can be
used to adjust the overall logic gain. Normally this is set to 1.0,
but it can be adjusted from 0.5 to 4.0. As the value of Z.GN is
increased, the cycling of cooling stages will be slowed.

CSB B2 Feedback Alarm (CS.B2) -- This configuration
is
used to enable or disable the compressor B2 feedback alarm.
This configuration must be enabled at all times.

CSB B1 Feedback Alarm (CS.B1) -- This configuration
is
used to enable or disable the compressor B1 feedback alarm.
This configuration must be enabled at all times.

Reverse Rotation Verified? (REV.R) -- If this configuration
is set to NO, then after a power up, in the normal run mode, the
control will check the suction pressure on the first circuit that is
energized after 5 seconds of run time. If the control does not
see a sufficient decrease in suction pressure over the first 5 seconds, mechanical cooling will be shut down, and an alarm will
be generated (A140). This alarm requires a manual reset.

Compressor
Lockout Temperature
(MCLO)
-- This configuration is the outdoor air temperature setting below which
mechanical cooling is locked out.
Fan-OffDelay,
Mech Cool ((AFOD) -- After a mechanical
cooling cycle has ended, this is the delay in seconds that the
supply fan will continue to operate.

If the unit is in the Service
performed any time a compressor

Once it has been verified that power to the rooftop and
compressors has been applied correctly and the compressors
start up normally, this configuration can be set to YES in order
to prevent the reverse rotation check from occumng.

Min. Load Valve (HGBP)? (MLV) -- This configuration instructs the control as to whether a minfinum load valve has
been installed and will be controlled by the compressor staging
routine.

High SST Alert Delay Time (H.SST) -- This option allows
the high saturated suction temperature alert tflning delay to be
adjusted.
COMPRESSOR
SAFETIES -- The 48/50A Series units with
Col_fortLink TM controls include a compressor protection board
(CSB) that protects the operation of each of the compressors.
These boards sense the presence or absence of current to each
compressor.
If there is a colrnnand for a compressor to run and there is
no current, then one of the following safeties or conditions
have turned the compressor off:

MotorMaster Control? (M.M.) -- The condenser fan staging
control for the unit is managed directly by the (_nfortLink TM
controls. There is no physical Motormaster :R:device in the
standard unit. The standard unit is capable of mechanical
cooling operation down to 32 F outdoor temperature. With the
addition of accessory Motormaster V speed control on the stage
1 condenser fan(s), mechanical
cooling operation down to
-20 F outdoor temperature is possible. The accessory Motormaster V speed control is a completely self-contained device
and is not managed by the unit's (_l_fortLink
controller. The
Motormaster control configuration (M.M.) only applies to the
060 size RTPF units. On 060 size RTPF units with accessory
Motormaster V speed control installed, this configuration must
be set to YES. See Head Pressure Control section, page 49, for
more inforlnation.

•

Compressor
overcurrent
-- Smaller compressors
have
internal line breaks and larger compressors have a dedicated
circuit breaker for overcurrent protection.
• Compressor short circuit -- the compressor circuit breaker
that provides short circuit protection has tripped then there
will not be current.
• Compressor motor over temperature -- the internal linebreak or over temperature switch has opened.
• High-pressure
switch trip -- High-pressure
switch has
opened.
Alarms will also occur if the current sensor board malfunctions or is not properly connected to its assigned digital input. If
the compressor is colmnanded OFF and the Current Sensor
reads ON, an alert is generated. This will indicate that a compressor contactor has failed closed. In this case, a special mode
"Compressor
Stuck on Control" will be enabled and all other
compressors will be turned offand an alarm enabled to indicate
that service is required. Indoor and outdoor fans will continue
to operate. The first outdoor fan stage is turned on igunediately.
The second fan stage will turn on when outdoor-air

Head Pressure Set Point (HPSP) -- This is the head pressure
set point used by the (_n_fortLink
control during condenser
fan, head pressure control.
Enable Compressor
A1 (A1.EN)
used to disable the A1 compressor

-- This configuration
in case of failure.

is

Enable Compressor
A2 (A2.EN)
used to disable the A2 compressor

-- This configuration
in case of failure.

is

Enable Compressor
B1 (B1.EN)
used to disable the B 1 compressor

-- This configuration
in case of failure.

is

Enable Compressor
B2 (B2.EN)
used to disable the B2 compressor

-- This configuration
in case of failure.

is

Test mode, the test will be
is energized.

CSB A1 Feedback Alarm (CS.A1) -- This configuration
is
used to enable or disable the compressor A1 feedback alarm.
This configuration must be enabled at all times.

39

temperature
(OAT)risesabove75For thehighest
activecircuitsaturated
condensing
temperature
(SCT)risesabove
the
HPSP
andremains
onuntilthecondition
isrepaired
regardless
oftheOATandSCTvalues.
Anytimethealertoccurs,
astrikeiscalled
outontheaffectedcompressor.
If three
successive
strikes
occurthecompressor
will belockedoutrequiring
amanual
resetorpowerresetof
thecircuitboard.
Theclearing
ofstrikes
during
compressor
operation
isacombination
of3complete
cycles
or15continuous
minutes
ofruntflneoperation.
If there
areoneortwostrikes
on
thecompressor
andthreeshortcycles(ON-OFF,
ON-OFF,
ON-OFF)
lessthan15minutes
each
occur,
thestrikes
arereset
tozerofortheaffected
compressor.
If thecompressor
turnson
andrunsfor15minutes
straight
withnocompressor
failure,
the
compressor
strikes
arecleared.
Additionally,
someunitscontainCopeland
compressors
equipped
withadvanced
scrolltemperature
protection
(ASTP).
A labellocated
abovetheterminal
boxidentifies
Copeland
Scrollcompressor
models
thatcontain
thistechnology.
See
Fig.5.Advanced
scrolltemperature
protection
isaformofinternal
discharge
temperature
protection
thatunloads
thescroll
compressor
whentheinternaltemperature
reaches
approximately300E At thistemperature,
aninternal
bi-metal
disk
valveopens
andcauses
thescrollelements
toseparate,
which
stopscompression.
Suction
anddischarge
pressures
balance
whilethemotorcontinues
torun.Thelongerthecompressor
runsunloaded,
thelonger
it mustcoolbefore
thebi-metal
disk
resets.
SeeFig.6.
Tomanually
resetASTRthecompressor
should
bestopped
andallowed
tocool.If thecompressor
isnotstopped,
themotor

will run until the motor protector trips, which occurs up to
90 minutes later. Advanced scroll temperature protection will
reset automatically
before the motor protector resets, which
may take up to 2 hours.
COMPRESSOR
TIME GUARDS -- The control will not allow any output relay to come on within 3 seconds of any other
output relay. For outputs connected to the compressors, the control will use a Compressor Minimum OFF Thne of 2 minutes, a
Compressor Minhnum ON Thne of 3 minutes and a Minhnum
Delay before turning on another compressor of 10 seconds.
COOL MODE SELECTION
PROCESS
-- The A Series
(_nfortLink
TM
controls offer three distinct methods by which
it may select a cooling mode.
1. Thermostat (4:TYP=-3 and 4): The thermostat does not
depend upon the state of occupancy and the modes are
called out directly by the discrete inputs from the thermostat (Inputs-cSTAT-cY1
and Y2).
2.

Occupied VAV cooling types ((: TYP=-I and 2) are called
out in the occupied
period (Operating
Modes--€
MODE-+ OCC=ON).

3.

Unoccupied
VAV cooling types (4:TYP=-I and 2) are
called out in the unoccupied period (Operating Modes--€
MODE--cOCC=OFF).
They are also used for space
sensor control types (4:TYP=-5 and 6) in both the occupied and unoccupied periods.

This section is devoted to the process of cooling
determination for the three types outlined above.

VAV Cool Mode Selection
during the Occupied
Period
(4: TYP = 1,2 and Operating Modes-cMODE
_OCC =ON)
-- There is no difference in the selection of a cooling mode for
either VAV-RAT or VAV-SPT in the occupied period. The actual
selection of a cool mode, for both control types, is based upon
the controlling return-air temperature (Temperatures-+AIR.
T
_TRL-+R.TMP).
Typically this is the same as the return air
temperature thermistor (Temperatures---)AIR.
T---_RAI) except
when under CCN Linkage.
VAV Occupied (_ol Mode Evaluation (_nfiguration
are VAV occupied cooling offsets under Seq_oints.
ITEM
V.C.ON
VC.OF

J

too
90

-

.-_

4o
50
30
20/

._-J /

/

to
0
0

10

20
Compressor

30

40
Unloaded

50
Run

60
Time

70

RANGE
0-25

UNITS
deltaF

CCNPOINT
VAVOCON

DEFAULT
3.5

1-25

deltaF

VAVOCOFF

2

The Setpoints--cV.C.ON
(VAV cool mode on offset) and
Setpoints-cV.C.OF
(VAV cool mode off offset) offsets are
used in coniunction with the low heat mode off trip point to
determine when to bring cooling on and off and in enforcing a
true "vent" mode between heating and cooling. See Fig. 7. The
occupied cooling set point is not used in the determination of
the cool mode. The occupied cooling set point is used for
supply air reset only.

.___. 80

_g

EXPANSION
VAV Occ.
Cool On Delta
VAV Occ.
Cool Off Delta

-- There

(_ol Mode Determination
-- If the machine control type
(Configuration--€
UNIT_:
TYP) = 1 (VAV-RAT) or 2 (VAVSPT) and the control
is occupied
(Operating
Modes
-+MODE-cOCC=ON),
then the unit will not follow the occupied cooling set point (OCSP). Instead, the control will follow
two offsets in the determination of an occupied VAV cooling
mode (Setpoints -+V..C.ON and Setpoints--cV.. C OF), applying
them to the low-heat offtrip point and comparing the resulting
temperature to the return-air temperature.

Fig. 5 -- Advanced Scroll Temperature
Protection Label

120
110

mode

80

90

(Minutes)

m

m

*Times are approximate.
NOTE: Various factors, including high humidity, high ambient temperature, and the presence of a sound blanket will increase cooldown times.

OHSP _

Fig. 6 -- Recommended Minimum Cool-Down
Time After Compressor is Stopped*

_

Fig. 7 -- VAV Occupied
4O

V.C. ON

Period

IV.C.

Trip

Logic

OF

The advantage of this offset technique is that the control can
safely enforce a vent mode without worrying about crossing set
points. Even more importantly,
under CCN linkage, the
occupied heating set point may drift up and down and this
method ensures a guaranteed separation in degrees Fahrenheit
between the calling out of a heating or cooling mode at all
times.

or is in the temperature compensated
start mode (T.CST). If
the unit is occupied or in temperature compensated start mode,
the occupied cooling set point (OCSP) is used. For all other
modes, the unoccupied cooling set point (UCSP) is used. For
further discussion and simplification this will be referred to as
the "cooling set point." See Fig. 8.
Demand Level Low (_ol ()n ()ff;'et (L.CON) -- This is the
cooling set point offset added to the cooling set point at which
point a Low Cool mode starts.

NOTE: There is a sub-menu at the local display (Run Status
--+TRIP) that allows the user to see the exact trip points for
both the heating and cooling modes without having to calculate them. Refer to the Cooling Mode Diagnostic Help section
on page 46 for more information.

Demand Level High (_ol On Off;'et (H.CON)
-- This is the
cooling set point offset added to the "cooling set point plus
L.CON"
at which point a High Cool mode begins.

To enter into a VAV Occupied Cool mode, the controlling
temperature
must rise above [OHSP minus L.H.ON
plus
L.H.OF plus V.C ONJ.

Demand Level Low (_ol Off Off;'et (L.C.OF) -- This is the
cooling set point offset subtracted from "cooling set point plus
L.CON"
at which point a Low Cool mode ends.

To exit out of a VAV Occupied Cool Mode, the controlling
temperature
must fall below [OHSP minus L.H.ON
plus
L.H.OFplus
V.CONminus
V.COF].

NOTE: The "high cool end" trip point uses the "low cool off'
(L.C.OF) offset divided by 2.

NOTE: With vent mode, it is possible to exit out
mode during the occupied period if the return-air
drops low enough. When supply-air temperature
configured, this capability will work to prevent
the space during the occupied period.

To enter into a LOW COOL mode, the controlling temperature must rise above the cooling set point plus L.CON.

of a cooling
temperature
reset is not
over-cooling

To enter into a HIGH COOL mode, the controlling temperature must rise above the cooling set point plus L.C.ON plus
H.CON.

,5'z_ply Air bet Point (_ntlvl and the Staging of (_mpressom
-- Once the control has determined that a cooling mode is in
effect, the cooling
control
point (Run
Status--+VIEW
_(Z.C.P)
is calculated and is based upon the supply air set
point (Setpoints-+SASP)
plus any supply air reset being
applied (Inputs--_RSET--_SA.S.R).

To exit out of a LOW COOL mode, the controlling temperature must fall below the cooling set point plus L. CON minus
L.COF.

Refer to the SumZ Cooling Algorithm section on page 46
for a discussion of how the A Series (_nfortLink TM controls
manage the staging of compressors
to maintain supply-air
temperature.

(_nfort
Trending -- In addition to the set points and offsets
which determine the trip points for bringing on and bringing
off cool modes, there are 2 configurations which work to hold
off the transitioning from a low cool to a high cool mode if the
space is cooling down quickly enough. This method is
referred to as Comfort Trending. The comfort trending configurations are C T.LV and C T. TM.

To exit out of a HIGH COOL mode, the controlling temperature must fall below the cooling set point plus L. CON minus
L. C OF/2.

VAV Cool Mode Selection during the Unoccupied
Period
(C.TYP = 1,2; Operating
Modes--_MODE_OCC=OFF)
and Space Sensor Cool Mode Selection (4:TYP=-5 and 6) -The machine control types that use this type of mode selection
are:
•
•
•
•

C TYP = 1 (VAV-RAT) in the unoccupied period
C.TYP = 2 (VAV-SPT) in the unoccupied
period
C.TYP = 5 (SPT-MULTI)
in both the occupied
unoccupied period
C TYP = 6 (SPT-2 STG) in both the occupied
unoccupied period

(_ol Trend Demand Level (CT.LV) -- This is the change in
demand that must occur within the time period specified by
C.T.TM in order to hold off a HIGH COOL mode regardless
of demand. This is not applicable
to VAV control types
(C TYP=-I and 2) in the occupied period. As long as a LOW
COOL mode is making progress in cooling the space, the control will hold off on the HIGH COOL mode. This is especially
true for the space sensor machine control types (C TYP = 5
and 6), because they may transition into the occupied mode
and see an ilrnnediate large cooling demand when the set
points change.

and
and

These particular control types operate differently than the
VAV types in the occupied mode in that there is both a LOW
COOL and a HIGH COOL mode. For both of these modes, the
control offers two independent set points, Seq_oints-+SA.LO
(for LOW COOL mode) and Setpoints--_SA.HI
(for HIGH
COOL mode). The occupied and unoccupied cooling set points
can be found under Setpoints.
ITEM

EXPANSION

RANGE

UNITS

CCN
POINT

(_ol Trend Time (CT.TM) -- This is the time period upon
which the cool trend demand level (CT.LV) operates and may
hold offstaging or a HIGH COOL mode. This is not applicable
to VAV control types (C TYP=-I and 2) in the occupied period.
See the Cool Trend Demand Level section for more details.

DEFAULT

OCSP

Occupied
Cool Setpoint

55-80

dF

OCSP

75

UCSP

Unoccupied
Cool Setpoint

75-95

dF

UCSP

90

Hi Cool Start

Lo Cool Start

The heat!cool set point offsets are found under Confignration--_D.LV.T. See Table 48.
Operating
ITEM
MODE
OCC
T.C.ST

modes are under Operating
EXPANSION
MODES CONTROLLING UNIT
Currently Occupied
Temp.Compensated
Start

L.C. OF OF/2_'r
[L.C.

--

Modes--_MODE.

[RANGE[
ON/OFF
ON/OFF

_

_HiCoo'End

Lo Cool End

CCN POINT

I MODEOCCP
[MODETCST

Cooling Setpoint (OCSP,UCSP)

(_ol Mode Evaluation Logic -- The first thing the control
determines is whether the unit is in the occupied mode (O4_)

Fig. 8-

41

Cool Mode Evaluation

Table 48 -- Cool/Heat Set Point Offsets Configuration
ITEM
D.LV.T
L.H.ON
H.H.ON
L.H.OF
L.C.ON
H.C.ON
L.C.OF
C. T.LV
H. T.LV
C.T.TM
H.T.TM

EXPANSION
COOL/HEAT SETPT. OFFSETS
Dmd Level
Lo Heat On
Dmd Level(+) Hi Heat On
Dmd Level(-) Lo Heat Off
Dmd Level
Lo Cool On
Dmd Level(+) Hi Cool On
Dmd Level(-) Lo Cool Off
Cool Trend Demand Level
Heat Trend Demand Level
Cool Trend Time
Heat Trend Time

[

RANGE

Timeguards -- In addition to the set points and offsets which
determine the trip points for bringing on and bringing off cool
modes there is a timeguard of 8 minutes which enforces a time
delay between the transitioning from a low cool to a high cool
mode. There is a timeguard of 5 minutes which enforces a thne
delay between the transitioning from a heat mode to a cool

UNITS
AF
AF
AF
AF
AF
AF
AF
AF
sec
see

1

CCN POINT

J

DMDLHON
DMDHHON
DMDLHOFF
DMDLCON
DMDHCON
DMDLCOFF
CTRENDLV
HTRENDLV
CTRENDTM
HTRENDTM

DEFAULT

1.5
0.5
1
1.5
0.5
1
0.1
0.1
120
120

are staged and the thning involved
High Cool HVAC Modes.

for both the Low Cool and

There are either three or four compressors divided among two
refrigeration circuits. Circuit A always contains two compressors
(Outputs_COOL-cA1
and A2). Circuit B has either one compressor (Outputs_,COOL-+B1)
on size 020-027 units or two
compressors (Outputs_COOL-cB1
and B2) on size 030-060
units. For 2-stage cooling control, regardless of configuration,
there is no mmhnum load valve (MLV) control. The decision as
to which compressor should be mined on or offnext is decided
by the compressor's availability and the preferred staging order.

mode.

Sz_ply Air Set Point (_ntrol -- Once the control has determined that a cooling mode is in effect, the cooling control
point (Run Status-+VIEW_(Z.C.P)
is calculated and is
based upon either Setpoints-cSA.HI
or Setpoints-cSA.LO,
depending on whether a high or a low cooling mode is in
effect, respectively. In addition, if supply air reset is configured, it will also be added to the cooling control point.

Either A1 or A2 may start first as there is a built-in lead/lag
logic on compressors A1 and A2 every time the unit stages to 0
compressors. Also, based on compressor availability, it should
be noted that any compressor may come on. For example, on a
3 compressor
unit, if no compressors
are currently
on,
compressor A2 is currently under a minimum off compressor
timeguard, and 2 compressors are to be turned on, then compressors A1 and B1 will be turned on hmnediately instead of
A1 and A2.

Refer to the SumZ Cooling Algorithm section for a discussion of how the A Series (_n_fortLink TM controls manage
supply-air temperature and the staging of compressors for these
control types.
Thermostat
Cool Mode Selection
((2: TYP = 3 and 4) -When a thermostat type is selected, the decision making process involved in determining
the mode is straightforward.
Upon energizing the Y1 input only, the unit HVAC mode will
be LOW COOL. Upon the energizing of both Y1 and Y2 inputs, the unit HVAC mode will be HIGH COOL. If just input
G is energized the unit HVAC mode will be VENT and the
supply fan will run.
Selecting the C TYP = 3 (TSTAT - MULTI)
will cause the control to do the following:

1

-1 -2
0.5 - 20.0
0.5- 2
-1 -2
0.5 - 20.0
0.5- 2
0.1 -5
0.1 -5
30 - 600
30 - 600

Low (_ol Vels'us High (_ol Mechanical Staging
The number of compressors to be requested during a cooling mode are
divided into 2 groups by the control, HVAC mode = Lo Cool
and HVAC mode = Hi Cool.
If the economizer is not able to provide free cooling (Run
Status-+ECON--+ACTV
= NO) then the following staging

control type

occurs

• Lo Cool Mode mechanical
• Hi Cool Mode mechanical
size units)
• Hi Cool Mode mechanical
size units)

• The control will read the Configuration-+UNIT--+SIZE
configuration
parameter
to determine
the number of
cooling stages and the pattern for each stage.
• An HVAC mode equal to LOW COOL will cause the
unit to select the Setpoints-cSA.LO
set point to control
to. An HVAC mode equal to HIGH COOL will cause the
unit to select the Setpoints-cSA.HI
set point to control
to. Supply air reset (if configured) will be added to either
the low or high cool set point.
• The control will utilize the SumZ cooling algoritlnn and
control cooling to a supply air set point. See the section
for the SumZ Cooling Algorithm section for information
on controlling to a supply air set point and compressor
staging.

If the economizer
tus--+ECON---)ACTV

stages = 2
stages = 3 (for 020 through

027

stages = 4 (for 030 through

060

is able to provide free cooling (Run Sta= YES) then the following staging

occurs

1. If the economizer's
current position is less than (bnfiguration-cE(DN-cEC.MX5 and mechanical cooling
has not yet started for the current cool mode session then:

2.

Selecting the C TYP = 4 (TSTAT - 2 STG) control type
means that only two stages of cooling will be used. On unit
sizes 020, 025 and 027 (with three compressors),
an HVAC
Mode of LOW COOL will energize one compressor
in Circuit A; an HVAC Mode of HIGH COOL will energize all
three compressors.
On unit sizes 030 and larger (with four
compressors)
an HVAC Mode of LOW COOL will energize
both compressors
in Circuit A; an HVAC Mode of HIGH
COOL will energize all four compressors.
Refer to the section on Economizer
Integration
with Mechanical
Cooling
for more information.

3.

2-Stage Cooling Control Logic ((: TYP = 4 and 6) -- The
logic that stages mechanical cooling for the TSTAT and SPT
2-Stage cooling control types differs from that of the multistage control types. This section will explain how compressors

4.

42

Lo Cool Mode mechanical

stages = 0

Hi Cool Mode mechanical

stages = 0

During the first 2.5 minutes of a low or high cool mode
where the economizer position is greater than (bnfiguration --¢E(DN-cEC.MX5% and mechanical cooling
has not yet started:
Lo Cool Mode mechanical

stages = 0

Hi Cool Mode mechanical

stages = 0

If the economizer position is greater than (bnfiguration
--+ECON--+EC.MX5% for more than 2.5 minutes but
less than 5.5 minutes and mechanical cooling has not yet
started then:
Lo Cool Mode mechanical

stages = 1

Hi Cool Mode mechanical

stages = 1

If the economizer position is greater than (bnfiguration
--+ECON--)ECMX5% for more than 5.5 minutes but
less than 8 minutes and mechanical cooling has started

then Lo Cool Mode mechanical
Mode mechanical stages = 2.
5.

6.

stages = 2 and Hi Cool

If the set point cannot be satisfied or the economizer is not
active, then cooling will be brought on one stage at a time
when the evaporator discharge temperature (EDT) is greater
the 1.5 ° F above the current cooling control point. A start-up
time delay of 10 minutes and steady state delay after a compressor is energized of 5 minutes is enforced.

If the economizer position is greater than (bnfiguration
-+ECON-+ECMX5% for more than 8 minutes but
less than 11.5 minutes and mechanical cooling has started
then:
Lo Cool Mode mechanical

stages = 2

Hi Cool Mode mechanical

stages = 3

If both circuits of mechanical cooling are running, then the
economizer will attempt to control to 48 E If the economizer is
active and the outside-air temperature (OAT) is less than the
cooling control point + 0.5 F, the compressors will be locked
off. When mechanical cooling is on, the control may also use
the economizer to trim the leaving-air temperature to prevent
unnecessary cycles of the compressor stages.

If the economizer position is greater than (bnfiguration
-sECON-sEC.MX5% for more than 11.5 minutes and
mechanical cooling has started then:
Lo Cool Mode mechanical

stages = 2

Hi Cool Mode
units only)

mechanical

stages = 3 (for 020 to 027

Hi Cool Mode
units only)

mechanical

stages = 4 (for 030 to 060

See the Economizer Integration with Mechanical Cooling
section for more information on the holding off of mechanical
cooling as well as the economizer control point.

Table 49 -- 2-Stage Sequence -48/50AJ,AW020-027

NOTE: If some compressors
are not available due to being
faulted, the Hi Cool Mode number of compressors are affected
before the Lo Cool Mode number of compressors. For example, if a 4 compressor unit has one compressor faulted, and the
economizer
is not active, then an HVAC mode Hi Cool
requested number of compressors is changed from 4 to 3. If
another compressor
faults, then both Lo Cool and Hi Cool
requested number of compressors
are set to 2. In addition,
compressors
cannot be brought on faster than one every
30 seconds. If the control needs to bring on 2 compressors at
once, the first compressor will come on followed by the second
compressor 30 seconds later.
Staging of compressors is shown in Tables 49-60.

SEQUENCE 1

STAGE

o l

i

I

SEQUENCE 2

2

01

1 I

2

Thermostat Inputs
Thermostat Inputs
OPEN CLOSED I CLOSED OPEN CLOSED CLOSED
Y1
Y2
OPEN OPEN CLOSED OPEN OPEN CLOSED
COMP
Compressor Status
Compressor Status
A1
OFF
ON
ON
OFF
OFF
ON
A2
OFF
OFF
ON
OFF
ON
ON
B1
OFF
OFF
ON
OFF
OFF
ON
UNIT
Unit Capacity
Unit Capacity
020
0%
67%
100%
0%
67%
100%
I

EDT Low Override -- There is an override if EDT drops too
low based on an alert lhnit that will lock out cooling. If the
supply air/evaporator discharge temperature (EDT) falls below
the alert limit ((bnfiguration---)ALLM--+SA.L.O)
cooling will
be inhibited. There is a 20-minute hold off on starting cooling
again once the following statement is true: EDT minus (Run
Status _COOL--sSUMZ--sADD.R)
has risen above SA.L.O.

025
027

The variable ADD.R is one of the SumZ cooling algofithin
control variables dedicated mainly for multi-stage control.

STAGE

2-Stage (_ntlvl and the Economizer -- The 2-stage logic will
first check for the availability of the economizer. If free cooling
can be used, then the control will first attempt to use the free
cooling.

Thermostat Inputs
Thermostat Inputs
OPEN CLOSED I CLOSED OPEN l CLOSED CLOSED
Y1
Y2
OPEN OPEN CLOSED OPEN[ OPEN CLOSED
COMP
Compressor Status
Compressor Status

If no mechanical cooling is active, and the economizer is
active, the economizer will first attempt to control to a cooling
control point of either the supply air set point high (SA.H1) or
supply air set point low (SA.LO) plus any reset applied,
depending on whether High Cool or Low Cool mode is in effect, respectively.

A1
A2
B1
B2
UNIT
030

OFF

ON

ON

OFF

ON

ON

OFF
OFF

ON
OFF

ON
ON

OFF
OFF

ON
OFF

ON
ON

OFF

OFF

ON

OFF

OFF

ON

If one stage of mechanical cooling is on, and the economizer is active, then the economizer will attempt to control to 53 E
Also If HVAC mode = LOW COOL, the second stage of
mechanical cooling will be locked out.

035,036
040,041
050
051,060

0%

48%

100%

0%

48%

100%

0%

43%

100%

0%

43%

100%

0%

45%

100%

0%

45%

100%

0%

50%

100%

0%

50%

100%

0%

65%

100%

0%

65%

100%

0%

67%

100%

0%

67%

100%

Table 50 -- 2-Stage Sequence -48/50AJ,AW030-060
SEQUENCE 1

o l

i

SEQUENCE 2

I

2

01

1 I

2

I

0%

Unit Capacity
45%
100%

0%

Unit Capacity
45%
100%

Table 51 -- Staging Sequence Without Hot Gas Bypass -48/50AK,AY020-027 and Multi-Stage 48/50AJ,AW020-027
STAGE

0

1

SEQUENCE
2

COMP
A1

OFF

Compressor
ON
ON

A2
B1

OFF
OFF

OFF
OFF

UNIT
020

0%

33%

025

0%

30%

027

0%

33%

1
3

4

0

1

SEQUENCE
2

Status
OFF

ON

OFF

Compressor
OFF
ON

ON
ON

ON
ON

OFF
OFF

ON
OFF

48/50A
67%

100%

0%

33%

65%

70%

100%

0%

35%

67%

67%

100%

0%

33%

ON
OFF
Unit Capacity
67%

43

ON
OFF
Unit Capacity
67%

2
3

4

Status
ON

ON

OFF
ON

ON
ON

48/50A
67%

100%

65%

65%

100%

67%

67%

100%

Table 52 n Staging Sequence With Hot Gas Bypass
48/50AK,AY020-027 and Multi-Stage 48/50AJ,AW020-027
SEQUENCE

STAGE
I

I

1

COMP

2 I

1

SEQUENCE

a I

4

Compressor Status
ON
ON

I

s

I

I

1

2 I

2

a

I

4

Compressor Status
OFF
ON

I

s

A1

OFF

ON*

OFF

ON

OFF

OFF

ON

ON

A2

OFF

OFF

OFF

ON

ON

ON

OFF

ON*

ON

ON

OFF

ON

B1

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

OFF

OFF

ON

ON

UNIT

Unit Capacity

48/50A

Unit Capacity

48/50A

020

0%

18%

33%

67%

67%

100%

0%

18%

33%

67%

67%

100%

025

0%

17%

30%

65%

70%

100%

0%

22%

35%

65%

65%

100%

027

0%

21%

33%

67%

67%

100%

0%

21%

33%

67%

67%

100%

*With Minimum Load Valve ON,

Table 53 -- Staging Sequence Without Hot Gas Bypass -48/50AK,AY030-060 and Multi-Stage 48/50AJ,AW030-060
SEQUENCE 1

STAG E

t

I

2

COMP

I

ON
OFF

OFF
OFF

OFF
OFF

030

0%

23%

035,036

0%

040,041

0%

22%
21%

48%
43%

050

0%

051

0%

23%
25%

060

0%

24%

A2
B1
B2

3

I

4

Compressor Status
ON
OFF
ON
ON

OFF
OFF

A1

SEQUENCE 2

5

I

I

1

2

I

3

I

ON
ON

OFF
OFF

OFF
ON

ON
OFF

ON
ON

OFF
OFF

OFF
OFF

73%

100%

0%

23%

52%
50%

74%
71%

100%
100%

0%

26%
21%

48%
43%

48%
50%

46%
50%

46%
50%

68%
75%

100%
100%

0%
0%

23%
25%

46%
50%

50%

50%

74%

100%

0%

26%

50%

ON
OFF

Unit Capacity 48/50A
45%
50%

0%

4

Compressor Status
ON
ON
ON
OFF

ON
ON

OFF
OFF

UNIT

I

OFF
OFF

I

5

ON
ON

ON
ON

OFF
ON

ON
ON

73%

100%

74%
72%

100%
100%

54%
50%

77%
75%

100%
100%

50%

76%

100%

OFF
ON

Unit Capacity 48/50A
45%
50%

Table 54 -- Staging Sequence With Hot Gas Bypass -- 48/50AK,AY030-060
SEQUENCE 1
STAGE

SEQUENCE 2

I 2 I 3 I 4 I 5 I

COMP

6

o I1

12

13

14

15

I

6

OFF
OFF

ON*
OFF

Compressor Status
ON
ON
OFF
OFF
ON
ON

OFF
OFF

OFF
OFF

OFF
OFF

ON
OFF

ON
OFF

ON
ON

OFF
OFF

OFF
OFF

OFF
ON

OFF
ON

OFF
ON

ON
ON

030

0%

12%

Unit Capacity 48/50A
23%
45%
50%

73%

100%

0%

12%

Unit Capacity 48/50A
23%
45%
50%

73%

100%

035,036

0%

12%

040,041

0%

13%

22%
21%

48%
43%

52%
50%

74%
71%

100%
100%

0%
0%

16%
13%

26%
21%

48%
43%

48%
50%

74%
72%

100%
100%

050

0%

16%

051

0%

19%

23%
25%

46%
50%

46%
50%

68%
75%

100%
100%

0%
0%

16%
19%

23%
25%

46%
50%

54%
50%

77%
75%

100%
100%

060

0%

19%

24%

50%

50%

74%

100%

0%

21%

26%

50%

50%

76%

100%

A1
A2
B1
B2
UNIT

OFF
OFF

ON
ON

ON
ON

OFF
OFF

OFF
ON*

Compressor Status
OFF
ON
ON
ON
ON
OFF

ON
ON

ON
ON

OFF
OFF

*With minimum load valve ON,

Table 55 -- 2-Stage Sequence -48/50A2,A4020-027
STAGE

SEQUENCE

o l

1 I

Thermostat
Y1

OPEN

Y2

OPEN
OPEN
Compressor
OFF
ON
OFF
OFF

COMP
A1
A2
B1

SEQUENCE

2

Inputs

CLOSED I CLOSED

01

1 I

Thermostat
OPEN

OFF

025

0%
0%

027

0%

OFF

STAGE

2

Inputs

ON

100%

OPEN
OPEN
Compressor
OFF
OFF
OFF
ON
OFF
0%
0%
0%

OFF

Y1
Y2

CLOSED
Status
ON
ON

COMP
A1
A2

ON

Unit Capacity
30%
100%
33%
100%
33%

SEQUENCE

o l

1 I

Thermostat

I

CLOSED
Status
ON
ON

Unit Capacity
30%
100%
33%
100%
33%

2

CLOSED JCLOSED

I

UNIT
020

1

Table 56 -- 2-Stage Sequence -48/50A2,A4030-060

44

SEQUENCE

2

Inputs

OPEN CLOSED CLOSED
OPEN
OPEN
CLOSED
Compressor
Status
OFF
ON
ON
OFF
OFF
ON

01

Thermostat
OPEN

2

1 I

2

Inputs

CLOSED JCLOSED
I

OPEN
OPEN
Compressor
OFF
OFF
OFF
ON

CLOSED
Status
ON
ON

B1

OFF

ON

ON

OFF

OFF

ON

B2

OFF

OFF

ON

OFF

ON

ON

UNIT

100%

1

Unit Capacity
50%
100%

0%

Unit Capacity
50%
100%

030

0%

035
040

0%

50%

100%

0%

50%

100%

0%

50%

100%

0%

50%

100%

050

0%

50%

100%

0%

50%

100%

060

0%

50%

100%

0%

50%

100%

Table 57 -- Staging Sequence Without Hot Gas Bypass -48/50A3,A5020-027 and Multi-Stage 48/50A2,A4020-027
SEQUENCE

STAGE

1

SEQUENCE

2

A1

OFF

1
I
Compressor
ON

ON

OFF

1
I
Compressor
OFF

A2

OFF

OFF

OFF

ON

OFF

ON

ON

ON

B1
UNIT

OFF

OFF

ON

ON

OFF

OFF

ON

ON

020

0%

Unit Capacity 48/50A
30%
70%

100%

0%

Unit Capacity
30%

48/50A
70%

100%

025

0%

33%

67%

100%

0%

33%

67%

100%

027

0%

33%

67%

100%

0%

33%

67%

100%

COMP

2
Status
ON

2
Status
OFF

ON

Table 58 u Staging Sequence With Hot Gas Bypass -48/50A3,A5020-027 and Multi-Stage 48/50A2,A4020-027
STAGE

SEQUENCE
2

1

1
3

COMP
A1

OFF

Compressor
ON*
ON

A2

OFF

OFF

B1

OFF

OFF

020

0%

Unit Capacity 48/50A
10%
30%
70%

025
027

0%

17%

33%

67%

0%

17%

33%

67%

UNIT

SEQUENCE
2

1

2
3

Status
ON

ON

OFF

Compressor
OFF
OFF

Status
OFF

OFF

OFF

ON

OFF

ON*

ON

ON

ON

OFF

ON

ON

OFF

OFF

ON

OFF

ON

100%

0%

Unit Capacity 48/50A
10%
30%
70%

ON
100%

100%

0%

17%

33%

67%

100%

100%

0%

17%

33%

67%

100%

*With Minimum Load Valve ON.

Table 59 -- Staging Sequence Without Hot Gas Bypass -48/50A3,A5030-060 and Multi-Stage 48/50A2,A4030-060
SEQUENCE 1

STAGE

I

COMP

OFF
OFF

ON
OFF

OFF
OFF

OFF
OFF

030

0%

25%

035

0%

20%

040

0%

25%

O5O

0%

25%

060

0%

25%

A1
A2
B1
B2
UNIT

2

SEQUENCE 2

I

a

I

Compressor Status
ON
ON
OFF
ON
ON
OFF

ON
OFF

Unit Capacity 48/50A
50%
75%

I

1

2

I

3

ON
ON

OFF
OFF

Compressor Status
OFF
ON
OFF
ON
OFF
ON

ON
ON

OFF
OFF

OFF
OFF

100%

0%

25%

50%
50%

80%
75%

100%

0%

20%

100%

0%

25%

50%
50%

75%
75%

100%

0%

25%

100%

0%

25%

ON
ON

ON
ON

ON
ON

Unit Capacity 48/50A
50%
75%

100%

ON
OFF

50%
50%

70%
75%

100%

50%
50%

75%
75%

100%

100%

100%

Table 60 -- Staging Sequence With Hot Gas Bypass -- 48/50A3,A5030-060
STAG E

SEQUENCE 1

0

I

t

COMP

B1

OFF
OFF
OFF

ON*
OFF
OFF

B2

OFF

OFF

A1
A2

UNIT

2

I

3

SEQUENCE 2

I

Compressor Status
ON
ON
OFF
OFF
OFF
ON
OFF

OFF

Unit Capacity 48/50A
25%
50%
20%
50%

030

0%

10%

035

0%

7%

040

0%

14%

25%

O5O

0%

16%

060

0%

18%

25%
25%

4

I

s

0 I

t

ON
ON
ON

ON
ON
ON

OFF
OFF
OFF

OFF
ON*
OFF

OFF

ON

OFF

OFF

I

2 I

a I

Compressor Status
OFF
OFF
ON
ON
OFF
OFF
OFF

ON

Unit Capacity 48/50A
25%
50%
20%
50%

4
OFF
ON
ON

ON
ON
ON

ON

ON

75%
70%

100%

75%
80%

100%
100%

0%
0%

10%
7%

50%

75%

100%

0%

14%

25%

50%

75%

100%

50%
50%

75%
75%

100%
100%

0%
0%

16%
18%

25%
25%

50%
50%

75%
75%

100%

*With minimum load valve ON.

45

100%

100%

COOLING MODE DIAGNOSTIC
HELP -- To quickly determine the current trip points for the cooling modes, the Run
Stares sub-menu at the local display allows the user to view the
calculated start and stop points for both the cooling and heating
trip points. The following sub-menu can be found at the local
display under Run Status--+TRIP. See Table 61.

should drop in degrees depending on the R.PCT calculation
and exactly how much additional capacity is to be added.
ADD.R
stage)

SUB.R = R.PCT
cooling stage)

MODE TRIP HELPER
Unoccup. Cool Mode Start
Unoccup. Cool Mode End
Occupied Cool Mode Start
Occupied Cool Mode End
CtI.Temp RAT, SPT or Zone
Occupied Heat Mode End
Occupied Heat Mode Start
Unoccup. Heat Mode End
Unoccup. Heat Mode Start
the current HVAC MODE

dF
dF
dF
dF
dF
dF
dF
dF
dF

R.PCT

UCCLSTRT
UCCL END
OCCLSTRT
OCCL END
CTRLTEMP
OCHT END
OCHTSTRT
UCHT END
UCHTSTRT
String

a

= (MAT- ED_/

C. CAP

Cap Threshold Subtracting (Z.MIN) -- This parameter is
used in the calculation of SumZ and is calculated as follows:
Z.MIN
=
(-SUB.R)))

Z.PLU
=
(-ADD.R)))

-- This variable
by the control.

Maximum Cool Stages (MAX.S)
imum number of cooling stages
and capable of controlling.
Active Demand Limit (DEM.L)
this variable will represent the
control is currently lhnited to.

-- This variable is the maxthe control is configured for

* (-10

+ (4*

(bnfiguration_'OOL--cZGN
* 0.6

*

(10

+

(4*

High Telnp Cap Override (H. TMP) -- If stages of mechanical cooling are on and the error is greater than twice Y..PLU,
and the rate of change of error is greater than 0.5 ° F per minute,
then a stage of mechanical cooling will be added every 30 seconds. This ovemde is intended to react to situations where the
load rapidly increases.

the

Requested Cool Stage (REQ.S)
the cool stage currently requested

(bnfiguration_'OOL--cZGN
* 0.6

Cap Threshold Adding (Z.PLU) -- This parameter is used in
the calculation of SumZ and is calculated as follows:

Current Running Capacity (C(5tP)
-- This variable represents the amount of capacity in percent that is currently
running.
represents

after subtracting

Cap Deadband Adding (YPLU) --This is a control variable
used for High Temp Ovemde (H.TMP) and Slow Change
Ovemde (SLOW).
YPLU = -ADD.R*0.4375

The cooling algofithin's run-time variables are located at
the local display under Run Status_'OOL.
See Table 62.

-- This variable

capacity

Cap Deadband Subtracting (EMIN) -- This is a control variable used for Low Temp Override (L. TMP) and Slow Change
Override (SLOW).
Y.MIN = -SUB.R*0.4375

POINT
CCN

Capacity Threshold Adjust (Z. GN) -- This configuration is
used on units using the "SumZ" algofithin for cooling capacity
control (Configuration-+UNIT_:TYP
= 1, 2, 3 and 5). It
affects the cycling rate of the cooling stages by raising or
lowering the threshold that capacity must overcome in order to
add or subtract a stage of cooling.

Current Cool Stage (CUR.S)
cool stage currently running.

--

Rise Per Percent Capacity (R.PCT) -- This is a real time calculation that represents the amount of degrees of drop/rise
across the evaporator coil versus percent of current running
capacity.

Table 61 -- Run Status Mode Trip Helper

TRIP
UN. C.S
UN.C.E
OC.C.S
OC.C.E
TEMP
OC.H.E
OC.H.S
UN.H.E
UN.H.S
HVAC

* (C.(5tP

For Example: IfR, PCT = 0.2 and the control would be subtracting 30% capacity by taking the next step down, 0.2 times
-30 = -6 F (SUB.R)

The only configuration parameter for the SumZ algorithin is
located
at
the
local
display
under
Configuration
_'OOL--dZGN.
See Table 47.

UNITS

capacity after adding a cooling

Next Stage EDT Increase (SUB.R) -- This variable represents (if subtracting
a stage of cooling) how much the
temperature should rise in degrees depending on the R.PCT
calculation and exactly how much capacity is to be subtracted.

SUMZ COOL1NG ALGORITHM
-- The SumZ cooling algoritlnn is an adaptive PID which is used by the control whenever
more than 2 stages of cooling are present (C TYP = 1,2,3, and
5). This section will describe its operation and define its parameters. It is generally not necessary to modify parameters in this
section. The information is presented prhnarily for reference
and may be helpful for troubleshooting
complex operational
problems.

EXPANSION

* (C CAP--

For example: If R.PCT = 0.2 and the control would be
adding 20% cooling capacity by taking the next step up,
0.2 times 20 = 4 F (ADD.R).

The controlling temperature is "TEMP" and is in the middle
of the table for easy reference. The HVAC mode can also be
viewed at the bottom of the table.

ITEM

= R.PCT

Low Temp Cap Override (L. TMP) -- If the error is less than
twice Y.MIN, and the rate of change of error is less than
-0.5 ° F per minute, then a mechanical stage will be removed
every 30 seconds. This override is intended to quickly react to
situations where the load is rapidly reduced.

represents

Pull Down Cap Override (PULL) -- If the error from set
point is above 4 ° F, and the rate of change is less than -1 ° F per
minute, then pulldown is in effect, and "SUM" is set to 0. This
keeps mechanical cooling stages from being added when the
error is very large, but there is no load in the space. Pulldown
for units is expected to rarely occur, but is included for the rare
situation when it is needed. Most likely pulldown will occur
when mechanical cooling first becomes available shortly after
the control goes into an occupied mode (after a warm unoccupied mode).

-- If demand lhnit is active,
amount of capacity that the

Capacity Load Factor (SMZ) -- This factor builds up or
down over time (-100 to +100) and is used as the means of
adding or subtracting a cooling stage during mn time. It is a
normalized representation of the relationship between "Sum"
and "Z".
Next Stage EDT Decrease (ADD.R) -- This variable represents (if adding a stage of cooling) how much the temperature

46

Table 62 -- Run Status Cool Display
ITEM
COOL
C.CAP
C UR. S
REQ.S
MAX.S
DEM.L
SUMZ
SMZ
ADD.R
SUB.R
R.PCT
Y.MIN
ZPLU
ZMIN
ZPLU
H.TMP
L. TMP
PULL
SLOW

EXPANSION
COOLING INFORMATION
Current Running Capacity
Current Cool Stage
Requested Cool Stage
Maximum Cool Stages
Active Demand Limit
COOL CAR STAGE CONTROL
Capacity Load Factor
Next Stage EDT Decrease
Next Stage EDT Increase
Rise Per Percent Capacity
Cap Deadband Subtracting
Cap Deadband Adding
Cap Threshold Subtracting
Cap Threshold Adding
High Temp Cap Override
Low Temp Cap Override
Pull Down Cap Override
Slow Change Cap Override

1

RANGE

.I,

UNITS

[

CCNPOINT

%

CAPTOTAL
COOL STG
CL ST-AGE
CL_IAXSTG
DEM_LIM

^F

SMZ
ADDRISE

%

-1 O0 - +1 O0

^F

J

WRITE STATUS

forcible

SUBRISE
RISE PCT
Y MI_IUS
YPLUS
ZMINUS
Z PLUS
HI- TEMP
LOW TEMP
PULL-DOWN
SLO CHNG

Slow Change Cap Override (SLOW) -- With a rooftop unit,
the design rise at 100% total unit capacity is generally around
30 ° F. For a unit with 4 stages, each stage represents about
7.5 ° F of change to EDT. If stages could reliably be cycled at
very fast rates, the set point could be maintained very precisely.
Since it is not desirable to cycle compressors more than 6 cycles per hour, slow change ovemde takes care of keeping the
PID under control when "relatively" close to set point.

2) the amount
addition

of expected

rise for the next

cooling

stage

3) the amount
subtraction

of expected

rise for the next

cooling

stage

SumZ Operation -- The SumZ algorithin is an adaptive PID
style of control. The PID is progralmned within the control and
the relative speed of staging can only be influenced by the user
through the adjustment of the Z GN configuration. The capacity control algorithin uses a modified PID algorithin, with a self
adjusting gain which compensates for varying conditions, including changing flow rates across the evaporator coil.

Z.PLU=

The calculation of"Z" requires two variables, ZPL U used
when adding a stage and Z.MINused
when subtracting a stage.
They are calculated with the following formulas:
* 0.6
* 0.6

Z.GN = configuration used to modify the threshold
for staging ( Configuration-gC
OOL -gZ GN)
ADD.R
stage)

Previous hnplementations
of SumZ made static assumptions about the actual size of the next capacity jump up or
down. This control uses a "rise per percent capacity" technique
in the calculation of SumZ, instead of the previous "rise per
stage" method. For each jump, up or down in capacity, the
control will know beforehand
the exact capacity change
brought on. Better overall staging control can be realized with
this technique.
SUM Calculation -- The PID calculation of the "SUM" is
evaluated once every 80 seconds.

= R.PCT

SUB.R = R.PCT
ing stage)

* (C CAP - capacity
* (C CAP-

levels used

after adding a cooling

capacity after subtracting

a cool-

Both of these terms, Z.PLUand
Z.MIN, represent a threshold both positive and negative upon which the "SUM"
calculation must build up to in order to cause the compressor to
stage up or down.
(_mparing
SUM and Z -- The "SUM" calculation is compared against ZPL U and Z.MIN.
• If"SUM"
rises above Z.PLU, a cooling stage is added.
• If"SUM" falls belowZ.MIN,
a cooling stage is subtracted.
There is a variable called SMZ which is described in the
reference section and which can shnplify the task of watching
the demand build up or down over time. It is calculated as
follows:

SUM = Error + "SUM last thne through" + (3 * Error Rate)
Where:
SUM = the PID calculation, Error = EDT - Cooling Control
Point, Error Rate = Error- "Error last time through"
NOTE: "Error" is limited to between-50
and +50 and "Error
rate" is limited to between -20 and +20.
This "SUM"
in determining
subtracted.

Z GN * (10 + (4*(-ADD.R)))

Z.MIN= Z GN * (-10 + (4*(-SUB.R)))
Where:

If SUM is positive: SMZ = 100*(SUM!ZPLU)
If SUM is negative: SMZ = - 100 * (SUM!ZMIN)

will be compared against the "Z" calculations
whether cooling stages should be added or

Mixed Air Temperature
Calculation
(MAT) -- The mixedair temperature is calculated and is a function of the economizer position. Additionally there are some calculations in the control which can zero in over time on the relationship of return
and outside air as a function of economizer position. There are
two configurations which relate to the calculation of "MAT."
These configurations can be located at the local display under
Configuration -gUNIT.

Z Calculation -- For the "Z" calculation, the control attempts
to determine the entering and the leaving-air temperature of the
evaporator coil and based upon the difference between the two
during mechanical cooling, and then determines whether to
add or subtract a stage of cooling. This is the adaptive element.
The entering-air
temperature
is referred to as MAT
(mixed-air temperature) and the leaving-air temperature of the
evaporator coil is referred to as EDT (evaporator discharge
temperature).
They are found at the local display under the
Temperatures _C'TRL sub-menu.
The main elements to be calculated and used in the calculation of SumZ are:

ITEM

EXPANSION

RANGE

CON
POINT

I
I DEFAULTS
I

UNIT

UNIT CONFIGURATION

MAZS
MAZR

1) the rise per percent capacity (R.PCT)

47

MAT Calc Config
Reset MAT Table
Entr es?

0 -2
Yes/No

MAT SEL
MATRESET

Nlo

MAT Cale (_nfig (MAT.S) -- This configuration gives the
user two options in the processing of the mixed-air temperature
(MAT) calculation:
• MAT.S = 0
There will be no MAT calculation.

To use Demand Lhniting, select the type of demand limiting
to use. This is done with the Demand Lhnit Select configuration ((bnfiguration
-+DMD.L -+DM.L.S).

•

The configurations associated with demand lhniting
viewed at the local display at (bnfiguration--_DMD.L.
Table 63.

can be
See

Demand Limit Select (DM.L.S) -- This configuration
mines the type of demand lhniting.

deter-

MAT.S

To view the current demand lflniting
look at Run Status _'OOL
-+DEM.L.

= 1

The control will attempt to learn MAT over time. Any time
the system is in a vent mode and the economizer stays at a
particular position for long enough, MAT = EDT. Using this
method, the control has an internal table whereby it can
more closely determine the true MAT value.
MAT.S = 2

•
•

The control will not attempt to learn MAT over thne.
To calculate MAT linearly, the user should reset the MAT
table entries by setting MAT.R to YES. Then set MAT.S = 2.
The control will calculate MAT based on the position of the
economizer and outside air and return air temperature.
To freeze the MAT table entries, let the unit run withMAT.S
= 1. Once sufficient data has been collected, change MAT.S
= 2. Do not reset the MAT table.

•

•

Reset MAT Table Entries? (MAT.R) -- This configuration
allows the user to reset the internally stored MAT learned
configuration data back to the default values. The defaults are
set to a linear relationship
between the economizer damper
position and OAT and RAT in the calculation of MAT.
SumZ Overrides -- There are a number of overrides to the
SumZ algofitlun which may add or subtract stages of cooling.
•
•
•
•

•

Dmd

--

Dmd

--

Limit

Limit
Switch

I--cDL.S2

The following table illustrates the demand limiting (Run
Status_'OOL-+DEM.L)
that will be in effect based on the
logic of the applied switches:
Switch Status

Run Status--)COOL--)DEM.L

Inputs-->GEN.I-->DL.S1
Inputs-->GEN.I-->DL.S2

= OFF
= OFF

100%

Inputs-->GEN.I-->DL.Sl=
Inputs-->GEN.I-->DL.S2

ON
= OFF

Configuration--)DMD.L--)D.L.Sl

Inputs-->GEN.I-->DL.Sl=
Inputs-->GEN.I-->DL.S2

ON
= ON

Configuration--)DMD.L--)D.L.S2

Inputs-->GEN.I-->DL.Sl=
Inputs--)GEN.I--)DL.S2

OFF
= ON

Configuration--)DMD.L--)D.L.S2

= 1

4-20 mA Demand Limiting (DM.L.S
2) -- If the unit has
been configured for 4 to 20 mA demand limiting, then the
Inputs--c4-20--cDML.M
value is used to determine
the
amount of demand limiting in effect (Run Status _'OOL--+
DEM.L). The Demand Limit at 20 mA (D.L.20) configuration
must be set. This is the configured demand limit corresponding to a 20 mA input (0 to 100%).
The value of percentage reset is determined
by a linear
interpolation from 0% to "D.L.20"%
based on the Inputs--€
4-20--¢DML.M
input value.
The following examples illustrate the demand lfiniting
(Run Status_'OOL-+DEM.L)
that will be in effect based on
amount of current seen at the 4 to 20 mA input, DML.M.

and limiting

Two discrete inputs tied to configurable
demand limit set
point percentages.
An external 4 to 20 mA input that can reset capacity back
linearly to a set point percentage.
CCN loadshed functionality.

NOTE: It is also possible to force the demand
(Run Status--+(DOL
-+DEM.L).

Demand Limit Switch 1 Setpoint (D.L.S1)
Switch Setpoint 1 (0-100% total capacity)

Inputs" _GEN.

Mechanical
Coolin_
Lockout
((bnfiguration
_'OOL--€
MCLO)
-- This configuration allows a configurable outsideair temperature set point below which mechanical cooling will
be completely locked out.
DEMAND LIMIT CONTROL -- Demand
Lfinit
Control
may override the cooling algoritlun to limit or reduce cooling
capacity during run time. The term Demand Lfinit Control refers to the restriction of machine capacity to control the amount
of power that a machine will use. This can save the owner
money by limiting peaks in the power supply. Demand limit
control is intended to interface with an external Loadshed Device either through CCN colrnnunications,
external switches,
or 4 to 20 mA input.

•

This type of

Inputs" _GEN.I-+DL.S1

For a long cooling session where the outside-air temperarare may drop over time, there may be a point at which the
economizer has closed down far enough were the unit could
remove a cooling stage and open up the economizer further to
make up the difference.

•

Two-Switch Demand Limiting (DM.L.S
l) -demand limiting utilizes two discrete inputs:

The state of the discrete switch inputs can be found at the local display:

Economizer Trim Override -- The unit may drop stages of
cooling when the economizer is performing free cooling and
the configuration Configuration--+ECON--+E.TRM
is set to
Yes. The economizer controls to the same supply air set point
as mechanical cooling does for SumZ when E. TRM = Yes.
This allows for much tighter temperature control as well as cutting down on the cycling of compressors.

of loadshedding

in effect,

0 = NONE -- Demand Limiting not configured.
1 = 2 SWITCHES
-- This will enable switch input
demand limiting using the switch inputs connected to the
CEM board. Connections should be made to TB6-4,5,6.
2 = 4 to 20 mA -- This will enable the use of a remote 4
to 20 mA demand limit signal. The CEM module must
be used. The 4 to 20 mA signal must come from an
externally sourced controller and should be connected to
TB6-7,8.
3 = CCN LOADSHED
-- This will allow for loadshed
and red lining through CCN communications.

Demand Limit 2 Setpoint (D.L.S2)
Setpoint 2 (0-100% total capacity)

High Temp Cap Override (H. TMP)
Low Temp Cap Override (L. TMP)
Pull Down Cap Override (PULL)
Slow Change Cap Override (SLOW)

The control has the capability
in 3 ways:

currently

D.L.20 = 80%

I D.L.20 = 80%

I D.L.20 = 80%

DML.M == 100%
DEM.L
4mA

I DEM.L
DML.M == 90%
12 mA

I DEM.L
DML.M == 80%
20mA

CCN Loadshed Demand Limiting (DM.L.S = 3) -- If the unit
has been configured for CCN Loadshed Demand Limiting,
then the demand lhniting variable (Run Status_'OOL--+
DEM.L) is controlled via CCN colmnands.

limit variable

48

Table 63 -- Demand Limit Configuration
ITEM
DMD.L
DM.L.S
D.L.20
SH.NM
SH.DL
SH. TM
D.L.S1
D.L.S2

EXPANSION

I

DEMAND LIMIT CONFIG.
Demand Limit Select
Demand Limit at 20 ma
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time
Demand Limit Sw.1 Setpt.
Demand Limit Sw.2 Setpt.

The relevant configurations

RANGE

O- 100
0-3- 99
0
0 - 60
O- 120
0 - 100
0 - 100

Group Number

Loadshed Demand
Demand Delta

(SH.NM) -- CCN Loadshed

Delta

(SH.DL)

--

Maximum Loadshed Time (SH.TM) -Loadshed time

CCN

Group

Loadshed

CCN Maximum

The Loadshed Group Number (SH.NM) corresponds
to
the loadshed supervisory
device that resides elsewhere
on
the CCN network and broadcasts
loadshed
and redline
cognnands
to its associated
equipment parts. The SH.NM
variable will default to zero which is an invalid group number. This allows the loadshed function to be disabled until
configured.
Upon reception of a redline cognnand, the machine will be
prevented from starting if it is not running. If it is running,
then DEM.L is set equal to the current running cooling capacity (Run Status _COOL _C CAP).
Upon reception of a loadshed colmnand, the DEM.L variable is set to the current running cooling capacity (Run Status
_COOL_(LCAP)
minus the configured Loadshed Demand
Delta (SH.DL).
A redline colmnand or loadshed colmnand will stay in
effect until a Cancel redline or Cancel loadshed colmnand is
received, or until the configurable Maximum Loadshed time
(SH. TM) has elapsed.
HEAD PRESSURE CONTROL -- Condenser head pressure
control for the 48/50A series rooftops is controlled directly by
the unit, except when the unit is equipped and configured for
Motormaster(R) V control. The control is able to cycle up to
three stages of outdoor fans (see Table 64) to maintain acceptable head pressure.

%
%.
I mm
'/o
%

I

CCN POINT

I

DEFAULT

DMT2-OMA
SHED
NUM
DMD CTRL
SHED DEL

i

O0

DLSWSP1
SHED
TIM
DLSWSP2

80
_

For 020 to 035 size units, there are two outdoor fans that are
colrnnon to both refrigerant circuits. The control cycles two
stages of outdoor fans, one fan per stage, to maintain acceptable head pressure.
For 036 to 050 size units, there are four outdoor fans that are
colrnnon to both refrigerant circuits. The control cycles two
stages of outdoor fans, two fans per stage, to maintain acceptable head pressure.
For 051 and 060 size units - There are six outdoor fans that
are colrnnon to both refrigerant circuits (size 060 MCHX units
have 4 fans). The control cycles three stages of outdoor fans,
two fans for stage one, four fans for stage two, and six fans for
stage three to maintain acceptable head pressure.

For 48/50AJ,AK,AW, AY units, fan stages will react to samrated condensing
temperature
(SCT) sensors
(Temperatures--+REET--+SCT.A
and SCT.B) which are connected to
the condenser coils in circuit A and B. The control converts the
temperatures to the corresponding
refrigerant pressures (Pressures--cREEP
-+DRA and DRB).
For 48/50A2,A3,A4,A5
units, fan stages react to discharge
pressure transducers
(DPT) (Pressures--cREEP-+DRA
and
DRB) which are connected to the compressor discharge piping
in circuit A and B. The control converts the pressures to the
corresponding
saturated condensing temperatures
(Temperatures--+REE T--+SCT.A and SCT.B).

When a compressor has been colrnnanded on, then condenser fan A (MBB Relay 6) will be energized (CD.EA =
ON). Condenser fan A will remain on until all compressors
have been cognnanded off. If the highest active circuit SCT is
above the HPSP or if OAT is greater than 75 F then condenser
fan B (MBB Relay 5) will be energized (CD.EB = ON). Condenser fan B will remain on until all compressors have been
colrnnanded off, or the highest active circuit SCT drops 40 F
below the HPSP for greater than 2 minutes and OAT is less
than 73 E

Unit size (Configuration-cUnit-cSize),
refrigerant type
(Configuration-+Unit-+RFG1),
and condenser
heat exchanger type (Configuration-+Unit-+(ND.
1) are used to determine if the second stage fans are configured to respond to a
particular refrigerant circuit (independent control) or both refrigerant
circuits
(colmnon
control).
The 48/50A2,A3,
A4,A5060 units with microchannel
(MCHX) condenser heat
exchangers
are the only units that utilize independent
fan
controls.
If the unit is equipped with the accessory
control,
the
Motormaster
installed

UNITS

((bnfiguration--cCOOL--_M.M.)
must be set to YES if the
unit size ((bnfiguration--+Unit--cSize) is 60 tons and the condenser heat exchanger type ((bnfiguration--cUnit--cCND.1)
is RTPF (round robe plate fin). This is because the condenser
fan relay A (MBB Relay 6) output must be energized to enable
the Motormaster V control and must not be mined off by the
head pressure control algorithin. The size 60 ton unit with
RTPF condenser heat exchangers offers 3 stages of head pressure control and is the one case where condenser fan relay A
may be requested off during head pressure control operation.
By configuring M.M. to YES, the control is instructed not to
turn off the relay to attempt 3 stages of head pressure control.
There are two configurations provided for head pressure
control that can be found at the local display:
• (bnfiguration _COOL--_M.M. - Motor Master (bntrol?
• (bnfiguration-+COOL--cHPSPHead Pressure Setpoint
There are two outputs (MBB Relays) provided to control
head pressure:
• Outputs-cFANS-cCD.EA
- Condenser Fan Circuit A
(MBB Relay 6 - OFC1,4). For size 60 ton units with
MCHX condensers, MBB - Relay 6 drives OFC4 and compressor contactor B 1 or B2 auxiliary contacts drive OFC 1.
• Outputs-cFANS-cCD.EB
- Condenser Fan Circuit B
(MBB Relay 5 - OFC2)
Head Pressure Control Operation -- The following logic describes the head pressure control routines for the unit sizes outlined in Table 64.

for this type of demand limiting

are:
Loadshed
number

I

NOTE: For size 60 units with RTPF condenser heat exchangers not configured for Motormaster control, the control stages
down differently than the other units. For these units, the control will first turn off condenser fan relay A. After 2 minutes,
the control will turn offrelay B and turn back on relay A.

Motormaster V
configuration

49

Table 64 -- Condenser Fan Staging
48/50A UNIT SIZE

FAN RELAY

020-035

036-050

051,060

060 with MCHX

OFC1,4" (MBB - RELAY 6)

OFM1

OFM1, OFM2

OFM1, OFM2

OFM4

OFC2 (MBB - RELAY 5)
OFC3 C.A1-AUX or C.A2-AUX

OFM2
NA

OFM3, OFM4
NA

OFM3, OFM4, OFM5, OFM6
NA

OFM2

NA

NA

NA

OFM1

OFCI*

C.B1-AUX or C.B2-AUX

* For size 60 ton units with MCHX condensers,

For
outdoor
control
fan per

MBB - Relay 6 drives OFC4 and compressor

060 size units with MCHX condensers, there are four
fans, two for each independent refrigerant circuit. The
cycles two stages of outdoor fans for each circuit, one
stage, to maintain acceptable head pressure.

contactor B1 or B2 auxiliary contacts drive OFC1.

If the economizer is able to provide free cooling at the start
of a cooling session, the mechanical cooling algorithin checks
the
economizer's
current
position
(Run
Status--+
ECON-+ECN..P)
and compares it to the economizer's
maximum position
(C'onfiguration--+EC'ON--+EC:MX)
- 5%.
Once the economizer
has opened beyond this point a
2.5-minute timer starts. If the economizer stays beyond this
point for 2.5 minutes continuously,
the mechanical cooling
algofithin is allowed to start computing demand and stage
compressors.

When a circuit A compressor has been colrnnanded on, then
OFC3 is energized via the normally opened auxiliary contacts
on the compressor contactors. The auxiliary contacts are wired
such that turning on either circuit A compressor will energize
OFC3. Contactor OFC3 will remain on until all circuit A compressors have been colrnnanded off. If SCTA is above the
HPSP or if OAT is greater than 75 F, then condenser fan A
(MBB Relay 6) will be energized (CD.EA = ON) turning on
OFC4. Condenser fan A will remain on until all compressors
have been conunanded
off, or SCTA drops 40 F below the
HPSP for greater than 2 minutes and OAT is less than 73 F.

Economizer
Control Point (Run Status--+VIEW--+EC:
C:P)
-- There are 4 different ways to determine the economizer
control point when the economizer
is able to provide free
cooling:
If no mechanical
COOL

When a circuit B compressor has been conunanded on, then
OFC1 is energized via the normally opened auxiliary contacts
on the compressor contactors. The auxiliary contacts are wired
such that turning on either circuit B compressor will energize
OFC1. Contactor OFC1 will remain on until all circuit B compressors have been conunanded
off. If SCTB is above the
HPSP or if OAT is greater than 75 F, then condenser fan B
(MBB Relay 5) will be energized (CD.EB = ON) turning on
OFC2. Condenser fan B will remain on until all compressors
have been colmnanded off, or SCTB drops 40 F below the
HPSP for greater than 2 minutes and OAT is less than 73 F.

cooling

is active and HVAC mode = LOW

EC. C.P = Seq_oints--+SA.L
If no mechanical
COOL

cooling

0 + Inputs" -+RSET-+SA.S.R

is active and HVAC mode = HIGH

EC. C.P = Seq_oints -+SA.HI

+ Inputs" -+RSET-+SA.S.R

When the first stage of mechanical
EC.C.P
applied

cooling has started

= 53 F plus any economizer

When the second stage of mechanical
EC.C.P
applied

Failure Mode Operation -- If either of the SCT or DPT sensors fails, then the control defaults to head pressure control
based on the OAT sensor. The control turns on the second fan
stage when the OAT is above 65 F and stages down when OAT
drops below 50 F.

suction pressure

reset

cooling has started

= 48 F plus any economizer

suction pressure

reset

Heating

Control -- The A Series (_l,fortLink TM control system offers control for 3 different types of heating systems
to satisfy general space heating requirements: 2-stage gas heat,
2-stage electric heat and multiple-stage (staged) gas heat.

If the OAT sensor fails, then the control defaults to head
pressure control based on the SCT sensors. The control turns
on the second fan stage when the highest active circuit SCT is
above the HPSP and stages down when the highest active circuit SCT drops 40 F below the HPSP for longer than
2 minutes.

Variable air volume (VAV) type applications (C TYP = 1, 2,
3, or 5) require that the space terminal positions be colrnnanded
to open to Minimum Heating positions when gas or electric
heat systems are active, to provide for the unit heating
system's Minimum Heating Airflow rate.

If the SCT, DPT, and OAT sensors have all failed, then the
control turns on the first and second fan stages when any compressor is colrnnanded on.

For VAV applications, the heat interlock relay (HIR) function provides the switching of a control signal intended for use
by the VAV terminals. This signal must be used to conunand
the terminals to open to their Heating Open positions. The HIR
is energized whenever the Heating mode is active, an IAQ preoccupied force is active, or if fire smoke modes, pressurization,
or smoke purge modes are active.

Compressor current sensor boards (CSB) are used on all
units and are able to diagnose a compressor stuck on (welded
contactor) condition. If the control conunands a compressor off
and the CSB detects current flowing to the compressor, then
the first fan stage is turned on ilrnnediately. The second fan
stage will turn on when OAT rises above 75 F or the highest active circuit SCT rises above the HPSP and remain on until the
condition is repaired regardless of the OAT and SCT values.
ECONOMIZER
INTEGRATION
WITH MECHANICAL
COOLINGWhen the economizer is able to provide free
cooling (Run Status--cECON--cACTV
= YES), mechanical
cooling may be delayed or even held offindefinitely.
NOTE: Once mechanical
is no longer relevant.

OFM3

SETT1NG UP THE SYSTEM -- The heating configurations
are located at the local display under Configuration--cHEAT.
See Table 65.
Heating Control Type (HT.CF) -- The heating
available are selected with this variable.
0=
1=
2=
3=

cooling has started, this delay logic

control types

No Heat
Electric Heat
2 Stage Gas Heat
Staged Gas Heat

Heating Supply Air Set Point (HT.SP) -- In a low heat mode
for staged gas heat, this is the supply air set point for heating.

Economizer Mechanical
Cooling Delay -- This type of mechanical cooling delay is relevant to the all machine control
types.

5O

Table 65 -- Heating Configuration
ITEM

EXPANSION

HEAT
HT.CF
HT.SP
OC.EN
LAT.M
G.FOD
E.FOD

HEATING CONFIGURATION
Heating Control Type
Heating Supply Air Setpt
Occupied Heating Enabled
MBB Sensor Heat Relocate
Fan Off Delay, Gas Heat
Fan Off Delay, Elec Heat
STAGED GAS CONFIGS
Staged Gas Heat Type
Max Cap Change per Cycle
S.Gas DB min.dF/PID Rate
St.Gas Temp. Dead Band
Heat Rise dF/sec Clamp
LAT Limit Config
Limit Switch Monitoring?
Limit Switch High Temp
Limit Switch Low Temp
Heat Control Prop. Gain
Heat Control Derv. Gain
Heat PID Rate Config

SG.CF
HT.ST
CAP.M
M.R.DB
S.G.DB
RISE
LAT.L
LIM.M
SW.H.T
SW.L.T
HT.P
HT.D
HT. TM

IRANGE

I UNITS

80 - 120
Yes/No
Yes/No
0 -3
45 - 600
10 - 600

dF
sec
sec

0-4
5 - 45
0-5
0-5
0.05 - 0.2
0 - 20
Yes/No
110 - 180
100 - 170
0 - 1.5
0 - 1.5
60 - 300

AF
AF
dF
dF

sec

I CON POINT
HEATTYPE
SASPHEAT
HTOCCENA
HTLATMON
GAS FOD
ELEC FOD
HTSTGTYP
HTCAPMAX
HT MR DB
HT SG DB
HTSGRISE
HTLATLIM
HTLIMMON
HT LIMHI
HT LIMLO
HT PGAIN
HT DGAIN
HT,SGPIDR

IDEFAULT

45

0*

45*
0.5
2
0.06
10
Yes
170*
160*

11
90

*Some defaults are model number dependent.

VAV-RAT or VAV-SPT, except that for VAV-SPT, space temperature is used in the unoccupied period to turn on the supply
fan for 10 minutes before checking return-air temperature. The
actual selection of a heat mode, LOW or HIGH for both
control types, will be based upon the controlling return-air
temperature.
With sufficient heating demand, there are still conditions
that will prevent the unit from selecting a heat mode. First, the
unit must be configured for a heat type (Configuration--€
HEAT--+HT.(T not equal to "NONE"). Second, the unit has a
configuration which can enable or disable heating in the
occupied period except for a standard morning warmup cycle
((bnfiguration---_HEAT_OC.EN).
See descriptions above in
the Setting Up the System section for more information.
If the unit is allowed to select a heat mode, then the next
step is an evaluation of demand versus set point. At this point,
the logic is the sane as for control types SPT Multi-Stage and
SPT-2 Stage, (C TYP = 5,6) except for the actual temperature
compared against set point. See Temperature Driven Heat
Mode Evaluation section.

Occupied
Heating Enable (OC.EN)
-- This configuration
only applies when the unit's control type ((bnfiguration
-gUNIT_C
TYP) is configured for 1 (VAV-RAT) or 2 (VAVSPT). If the user wants to have the capability of performing
heating throughout the entire occupied period, then this configuration needs to be set to "YES". Most installations do not require this capability, and if heating is installed, it is used to heat
the building in the morning. In this case set OCENto
"NO".
NOTE: This unit does not support shnultaneous
heating and
cooling.
If significant
simultaneous
heating
and cooling
demand is expected, it may be necessary to provide additional
heating or cooling equipment and a control system to provide
occupants with proper comfort.
MBB Sensor Heat Relocate (LAT.M) -- This option allows
the user additional performance
benefit when under CCN
Linkage for the 2-stage electric and gas heating types. As twostage heating types do not "modulate" to a supply air set point,
no leaving air thermistor is required and none is provided. The
evaporator discharge thermistor, which is initially installed upstrean of the heater, can be repositioned downstrean
and the
control can expect to sense this heat. While the control does not
need this to energize stages of heat, the control can wait for a
sufficient temperature rise before announcing a heating mode
to a CCN linkage system (ComfortID_M).
If the sensor is relocated, the user will
capability to view the leaving-air temperature
Te mper atu r es --)AIR. T--c( TRL --cLA T.

Tstat-Multi-Stage
((: TYP = 3) and Tstat-2 Stage ((: TYP =
4) -- There is no difference in the selection of a heat mode between the control types TSTAT 2-stage or TSTAT multi-stage.
These selections only refer to how cooling will be handled.
With thermostat control the Wl and W2 inputs determine
whether the HVAC Mode is LOW or HIGH HEAT.

now have the
at all times at

Wl = ON, W2 = OFF: HVAC MODE = LOW HEAT*
W2 = ON, W2 = ON: HVAC MODE = HIGH HEAT

NOTE: If the user does not relocate this sensor for the 2-stage
electric or gas heating types and is under CCN Linkage, then
the control will send a heating mode (if present) unconditionally to the linkage coordinator in the CCN zoning system
regardless of the leaving-air temperature.

*If the heating type is either 2-stage electric or 2-stage gas, the
unit may promote a low heat mode to a high heat mode.
NOTE: If W2 = ON and Wl is OFF, a "HIGH HEAT" HVAC
Mode will be called out but an alert (T422) will be generated.
See Alarms and Alerts section on page 93.

Fan-Off Delay, Gas Heat (GFOD)
-- This configuration
is
the delay in seconds, after a gas heat mode has ended
(HT.CF=2,3)
that the control will continue to energize the
supply fan.

SPT Multi-Stage ((:TYP = 5) and SPT 2 Sta_e ((:TYP = 6)
-- There is no difference in the selection of a heat mode
between the control types SPT 2-stage or SPT multi-stage. These
selections only refer to how cooling will be handled. So, for a
valid heating type selected (HT.(T" not equal to zero) the unit is
free to select a heating mode based on space temperature (SPT).

Fan-Off Delay, Elec Heat (E.FOD) -- This configuration is
the delay in seconds, after an electric heat mode has ended
(HT.CF=I)
that the control will continue to energize the
supply fan.
HEAT MODE SELECTION
PROCESS -- There
are two
possible heat modes that the control will call out for heating
control: HVAC Mode = LOW HEAT and HVAC Mode =
HIGH HEAT. These modes will be called out based on control
type (C. TYP).

If the unit is allowed to select a heat mode, then the next
step is an evaluation of demand versus set point. At this point,
the logic is the sane as for control types VAV-RAT and
VAV-SPT (CTYP = 1,2), except for the actual temperature
compared against set point. See Temperature
Driven Heat
Mode Evaluation section on page 52.

VAV-RAT (C. TYP = 1) and VAV-SPT (C TYP = 2) -- There
is no difference in the selection of a heating mode for either
51

TEMPERATURE DRIVEN HEAT MODE EVALUATION -This section discusses the control method for selecting a heating mode based on temperature. Regardless of whether the unit
is configured for return air or space temperature, the logic is exactly the same. For the rest of this discussion, the temperature
in question will be referred to as the "controlling temperature."
First, the occupied and unoccupied heating set points under
Setpoints must be configured.
ITEM

EXPANSION

OHSP

Occupied
Setpoint

Heat

UHSP

Unoccupied
Heat Setpoint

CCN
POINT

To get out of a HIGH HEAT mode, the controlling temperature must rise above the heating set point minus L.H.ONplus
L.H.OF/2.

The Run Status table in the local display allows the user to
see the exact trip points for both the heating and cooling modes
without doing the calculations.
Heat Trend Demand Level (tt. T.LV) -- This is the change in
demand that must be seen within the time period specified by
H. r.rMin order to hold off a HIGH HEAT mode regardless of
demand. This is not applicable to VAV control types (C TYP=I
and 2) in the occupied period. This method of operation has
been referred to as "Comfort Trending." As long as a LOW
HEAT mode is making progress in warming the space, the control will hold off on a HIGH HEAT mode. This is relevant for
the space sensor machine control types (C TYP = 5 and 6) because they may transition into the occupied mode and see an
immediate and large heating demand when the set points
change.
Heat Trend Time (H. T.TM) -- This is the time period upon
which the heat trend demand level (/-/2.
T.LV) operates and may
work to hold off staging or a HIGH HEAT mode. This is not
applicable to VAV control types (CTYP=-I and 2) in the
occupied period. See "Heat Trend Demand Level" section for
more details.

DEFAULT

RANGE

UNITS

55-80

dF

OHSP

68

40-80

dF

UHSP

55

Then, the heat/cool set point offsets under Configuration
D.LV..Tshould
be set. See Table 66.
Related
MODE.

operating

modes

are under

Operating

Modes-+

I

ITEM
EXPANSION
I RANGE ICON POINT
MODE IMODES CONTROLLING UNIT
OCC ICurrentlyOccupied
ION/OFF IMODEOCCP
T.C.ST [Temp.CompensatedStart ION/OFF [MODETCST
The first thing the control determines is whether
is in the occupied mode (O(_) or in the temperature
sated start mode (T.CST). If the unit is occupied or in
ture compensated start mode, the occupied heating
(OHSP) is used. In all other cases, the unoccupied
setpoint (UHSP) is used.

the unit
compentemperaset point
heating

HEAT MODE DIAGNOSTIC HELP -- To quickly determine the current trip points for the low and high heat modes,
there is a menu in the local display which lets the user quickly
view the state of the system. This menu also contains the cool
trip points as well. See Table 67 at the local display under Run
Status--c TRIP

The control will call out a low or high heat mode by
comparing the controlling temperature to the heating set point
and the heating set point offset. The set point offsets are used as
additional help in customizing and tweaking comfort into the
building space.

The controlling temperature is "TEMP" and is in the middle
of the table for easy reference. Also, the "HVAC" mode can be
viewed at the bottom of the table.
HT.CF = 1,2 (Two-Stage Gas and Electric
If the HVAC mode is LOW HEAT:

Demand Level Low Heat on Offset (L.H.ON) -- This is the
heating set point offset below the heating set point at which
point Low Heat starts.

•

Demand Level High Heat on Offset (!-!.!-!.ON) -- This is the
heating set point offset below the heating set point minus
L.H.ONat
which point high heat starts.

•
•
•

Demand Level Low Heat Off Offset (L.H.OF)This is the
heating set point offset above the heating set point minus
L.H.ONat
which point the Low Heat mode ends.

Heat Control)

If Electric
Heat is configured,
then the control will
request the supply fan ON
If Gas Heat is configured,
then the IGC indoor fan input
controls the supply fan request
The control will turn on Heat Relay 1 (HS1)
If Evaporator
Discharge Temperature
is less than 50 F,
then the control will turn on Heat Relay 2 (HS2)*
the "Heating

See Fig. 9 for an example of offsets.

Setpoint"

To enter into a LOW HEAT mode, if the controlling temperature falls below the heating set point minus L.H.ON, then
HVAC mode = LOW HEAT.
To enter into a HIGH HEAT mode, if the controlling temperature falls below the heating set point minus L.H.ONminus
H.H.ON, then HVAC mode = HIGH HEAT.

_ H.H.ON

To get out of a LOW HEAT mode, the controlling temperature must rise above the heating set point minus L.H.ONplus
L.H.OF

Fig. 9 -- Heating Offsets

Table 66 -- Heat/Cool Set Point Offsets
ITEM
D.LVT
L.H.ON
H.H.ON
L.H.OF
L.C.ON
H.C.ON
L.C.OF
C.T.LV
H.T.LV
C.T.TM
H.T.TM

EXPANSION

1

COOL/HEAT SETPT. OFFSETS
Dmd Level
Lo Heat On
Dmd Level(+) Hi Heat On
Dmd Level(-) Lo Heat Off
Dmd Level
Lo Cool On
Dmd Level(+) Hi Cool On
Dmd Level(-) Lo Cool Off
Cool Trend Demand Level
Heat Trend Demand Level
Cool Trend Time
Heat Trend Time

RANGE
-1 - 2
0.5 - 20.0
0.5-2
-1 - 2
0.5 - 20.0
0.5-2
0.1 -5
0.1 -5
30 - 600
30 - 600

52

J

UNITS[

AF
AF
AF
AF
AF
AF
AF
AF
sec
sec

CCNPOINT
DMDLHON
DMDHHON
DMDLHOFF
DMDLCON
DMDHCON
DMDLCOFF
CTRENDLV
HTRENDLV
CTRENDTM
HTRENDTM

DEFAULT

J
1.5
0.5
1
1.5
0.5
1
0.1
0.1
120
120

Table 67 -- Mode Trip Helper Table
ITEM
TRIP
UN.C.S
UN.C.E
OC.C.S
OC.C.E
TEMP
OC.H.E
OC.H.S
UN.H.E
UN.H.S
HVAC

EXPANSION
MODE TRIP HELPER
Unoccup, Cool Mode Start
Unoccup, Cool Mode End
Occupied Cool Mode Start
Occupied Cool Mode End
CtI,Temp RAT,SPT or Zone
Occupied Heat Mode End
Occupied Heat Mode Start
Unoccup, Heat Mode End
Unoccup, Heat Mode Start
the current HVAC MODE

I UNITS
dF
dF
dF
dF
dF
dF
dF
dF
dF

Heat Control Prop. Gain (HT.P) -- This configuration is the
proportional term for the PID which runs in the HVAC mode
LOW HEAT.

I CCN POINT

Heat Control Defy. Gain (HT.D) -- This configuration is the
derivative term for the PID which runs in the HVAC mode
LOW HEAT.

UCCLSTRT
UCCL END
OCCLSTRT
OCCL END
CTRLTEMP
OCHT END
OCHT,STRT
UCHT END
UCHT,STRT
String

Heat PID Rate Config (HT.TM) -- This configuration is the
PID run trine rate.
Staged Gas Heating Logic
If the HVAC mode is HIGH HEAT:
•

The supply fan for staged gas heating is controlled by the
integrated
gas control (IGC) boards and, unless
the
supply fan is on for a different reason, it will be controlled by the IGC indoor fan input.
• Colmnand all stages of heat ON
If the HVAC mode is LOW HEAT:

If the HVAC mode is HIGH HEAT:
•
•
•
•

If Electric
Heat is configured,
then the control will
request the supply fan ON
If Gas Heat is configured,
then the IGC indoor fan input
controls the supply fan request
The control will turn on Heat Relay 1 (HS1)
The control will turn on Heat Relay 2 (HS2)

•

*The logic for this "low heat" ovemde is that one stage of
heating will not be able to raise the temperature of the supply
airstream sufficient to heat the space.

•

HT.(T
= 3 (Staged Gas Heating Control) -- As an option,
the units with gas heat can be equipped with staged gas
heat controls that will provide from 5 to 11 stages of heat
capacity. This is intended for tempering mode and tempering
economizer air when in a cooling mode and the dampers
are fully closed. Tempering can also be used during a preoccupancy purge to prevent low temperature air from being
delivered to the space. Tempering for staged gas will be discussed in its own section. This section will focus on heat mode
control, which ultimately is relevant to tempering, minus the
consideration of the supply air heating control point.

Staged Gas Heating PID Logic -- The heat control loop is a
PID (proportional/integral/derivative)
design with exceptions,
overrides, and clamps. Capacity rises and falls based on set
point and supply-air temperature. When the staged gas control
is in Low Heat or Tempering Mode (HVAC mode), the algorithln calculates the desired heat capacity. The basic factors that
govern the controlling method are:
•
•
•

The staged gas configurations
are located at the local
display under (bnfiguration
-+HEAT-+SGCF.
See Table 68.
Staged Gas Heat Type (HT.ST) -- This configuration
number of stages and the order that are they staged.

The supply fan for staged gas heating is controlled by the
integrated
gas control (IGC) boards and, unless
the
supply fan is on for a different reason, it will be controlled by the IGC indoor fan input.
The unit will control stages of heat to the heating control
point (Run Status-+VIEW-+HT.C.P).
The heating control point in a LOW HEAT HVAC mode for staged gas is
the heating supply air set point (Setpoints-+SA.HI).

sets the

•

how fast the algorithm is run.
the amount of proportional
and derivative gain applied.
the maximum
allowed capacity change each time this
algorithm is run.
deadband hold-offrange
when rate is low.

This routine is run once every HT.TM seconds. Every time
the routine is run, the calculated sum is added to the control
output value. In this manner, integral effect is achieved. Every
time this algorithm
is run, the following
calculation
is
performed:
Error = HT.CPLAT
Error last = error calculated previous time
P = !aFT.P*(Error)
D = HT.D*(Error - Erro_last)
The P and D terms are ovemdden to zero if:
Error < S.GDB AND Error > - S.GDB AND D < M.R.DB
AND D > - M.R.DB. "P + D" are then clamped based on
('ARM. This sum can be no larger or no smaller than +('ARM
or -('ARM.

Max Cap Change per Cycle (('ARM) -- This configuration
lhnits the maxhnum change in capacity per PID mn time cycle.
S.Gas DB Min.dF/PID
Rate (M.R.DB) -- This configuration
is a deadband minimum temperature per second rate. See
Staged Gas Heating logic below for more details.
St.Gas Temp.Dead Band (S.GDB) -- This configuration is a
deadband delta temperature.
See Staged Gas Heating logic
below for more details.
Heat Rise in dF/Sec Clamp (RISE)
-- This configuration
prevents the heat from staging up when the leaving-air temperamre is rising too fast.
LAT Limit Config (EAT.L) -This configuration
senses
when leaving-air temperature is outside a delta temperature
band around set point and allows staging to react quicker.

Finally, the desired capacity is calculated:

Limit Switch Monitoring?
(LIM.M)
-- This configuration
allows the operation of the lhnit switch monitoring routine.
This should be set to NO as a limit switch temperature sensor is
not used with A Series units.

Staged Gas Capacity Calculation = "P + D" + old Staged Gas
Capacity Calculation
NOTE: The PID values should not be modified
without
approval from Carrier.

Limit Switch High Temp (SW.H. T) -- This configuration is
the temperature
limit above which stages of heat will be
removed.

IMPORTANT: When gas or electric heat is used in a VAV
application with third party terminals, the HIR relay output
must be connected to the VAV terminals in the system in
order to enforce a minhnum
heating airflow rate. The
installer is responsible to ensure the total minimum heating
cfin is not below lhnits set for the equipment. Failure to do
so will result in lhnit switch tripping and may void warranty.

Limit Switch Low Temp (SW..L. T) -- This configuration
is
the temperature limit above which no additional stages of heat
will be allowed.

53

Table 68 -- Staged Gas Configuration
ITEM

EXPANSION

J

SG. CF
HT.ST
CAP.M
M.R.DB
S.G.DB
RISE
LAT.L
LIM.M
SW.H.T
SW.L.T
HT.P
HT.D
HT. TM

STAGED GAS CONFIGS
Staged Gas Heat Type
Max Cap Change per Cycle
S.Gas DB min.dF/PID Rate
St.Gas Temp. Dead Band
Heat Rise dF/sec Clamp
LAT Limit Config
Limit Switch Monitoring?
Limit Switch High Temp
Limit Switch Low Temp
Heat Control Prop. Gain
Heat Control Derv. Gain
Heat PID Rate Config
*Some configurations are model number dependent.

RANGE

0-4
5 - 45
0-5
0 -5
0.05 - 0.2
0 - 20
Yes/No
110 - 180
100 - 170
0 - 1,5
0 - 1,5
60 - 300

Staged Gas Heat Staging -- Different unit sizes will control
heat stages differently based on the amount of heating capacity
included. These staging patterns are selected based on the model number. The selection of a set of staging patterns is controlled via the heat stage type configuration parameter (HT.ST).
As the heating capacity rises and falls based on demand, the
staged gas control logic will stage the heat relay patterns up and
down, respectively. The Heat Stage Type configuration selects
one of 4 staging patterns that the stage gas control will use. In
addition to the staging patterns, the capacity for each stage
is also determined by the staged gas heating PID control. Therefore, choosing the heat relay outputs is a function of the capacity desired, the heat staging patterns based on the heat stage type
(HT.ST) and the capacity presented by each staging pattem. As
the staged gas control desired capacity rises, it is continually
checked against the capacity of the next staging pattern.

J

UNITS

INTEGRATED GAS CONTROL BOARD LOGIC -- All gas
heat units are equipped with one or more integrated gas control
(IGC) boards. This board provides control for the ignition system for the gas heat sections. On size 020-050 low heat units

HTSTGTYP
HTCAPMAX
HT MR DB
HT SG DB
HTSGRISE
HTLATLIM
HTLIMMON
HT LIMHI
HT LIMLO
HT PGAIN
HT DGAIN
HT,SGPIDR

^F
^F
dF
dF

sec

Table 69A -- Staged Gas Heat -- 48AJ,AK,AW,AY

020-035
036-050
051,060

CCN POINT

[

DEFAULTS
O*

45*
0.5
2
0.06
10
Yes
170*
160*

11
90

there will be one IGC board. On size 020-050 high heat units
and 051 and 060 low heat units there are two IGC boards. On
size 051 and 060 high heat units there are three IGC boards.
When a call for gas heat is initiated, power is sent to W on the
IGC boards. For standard 2-stage heat, all boards are wired
in parallel. For staged gas heat, each board is controlled separately. When energized, an LED on the IGC board will be
turned on. See Table 74 for LED explanations. Each board will
ensure that the rollont switch and limit switch are closed. The
induced-draft motor is then energized. When the speed of the
motor is proven with the Hall Effect sensor on the motoc the
ignition activation period begins. The burners ignite within
5 seconds. If the burners do not light, there is a 22-second delay
before another 5-second attempt is made. If the burners still do
not light, this sequence is repeated for 15 minutes. After
15 minutes have elapsed and the burners have not ignited then
heating is locked out. The control will reset when the request
for W (heat) is temporarily removed. When ignition occurs, the
IGC board will continue to monitor the condition of the rollout
switch, limit switches, Hall Effect sensor, and the flame sensor.
Forty-five seconds after ignition has occurred, the IGC will
request that the indoor fan be turned on. The IGC fan output
(IFO) is connected to the indoor fan input on the MBB which
will indicate to the controls that the indoor fan should be turned
on (if not already on). If for some reason the overtemperature
limit switch trips prior to the start of the indoor fan blowec on
the next attempt the 45-second delay will be shortened by
5 seconds. Gas will not be interrupted to the burners and heating will continue. Once modified, the fan delay will not change
back to 45 seconds unless power is reset to the control. The
IGC boards only control the first stage of gas heat on each gas
valve. The second stages are controlled directly from the MBB
board. The IGC board has a minimum on-tflne of 1 minute. In
modes such as Service Test where long minimum on times are
not enforced, the 1-minute tflner on the IGC will still be followed and the gas will remain on for a minflnum of 1 minute.

When the desired capacity is greater than or equal to the
capacity of the next staging pattern, the next heat stage is selected (Run Status-+VIEW-+HT.ST
= Run Status-+VIEW-+
HT.ST + 1). Similarly, as the capacity of the control drops, the
desired capacity is continually checked against the next lower
stage. When the desired capacity is less than or equal to the next
lower staging pattem, the next lower heat stage pattern is selected (Run Status-+VIEW-+HT.ST
= Run Status-+VIEW-+
HT.ST- 1). The first two staged gas heat outputs are located on
the MBB board and outputs 3, 4, 5, and 6 are located on
the SCB board. These outputs are used to produce 5 to 11 stages
as shown in Tables 69A and 69B. The heat stage selected (Run
Status-+VIEW-+HT.ST)
is clamped between 0 and the maximum
number
of
stages
possible
(Run
Status-+
VIEW-+H.MAX)
for the chosen set of staging patterns. See
Tables 70-73.

UNIT SIZE

I

HEAT CAPACITY

UNIT MODEL NO.
POSITION NO. 5

Units

Configuration-+HEAT-+SG.CF
-+HT.STENTRY
VALUE

Low

S

1=

High
Low

T
S

2 = 7 STAGE
1= 5 STAGE

High
Low

T
S

1 = 5 STAGE
4 = 11 STAGE

High

T

3 = 9 STAGE

54

5 STAGE

Table 69B -- Staged Gas Heat -- 48A2,A3,A4,A5
UNIT SIZE

HEAT CAPACITY

UNIT MODEL NO.
POSITION NO. 5

020-030
035-050
060

Units

Configuration--_HEAT-_SG.CF
--_HT.STENTRY VALUE

Low

S

1=

High
Low

T
S

2 = 7 STAGE
1= 5 STAGE

5 STAGE

High
Low

T
S

1 = 5 STAGE
4 = 11 STAGE

High

T

3 = 9 STAGE

Table 70 -- Staged Gas Heat Control Steps (Configuration_HEAT_SG.CF_HT.ST

= 1)

RELAY OUTPUT
STAGE

Heat 1
MBB-RLY8

Heat 2
MBB-RLY7

Heat 3
SCB-RLY1

Heat 4
SCB-RLY2

Heat 5
SCB-RLY3

Heat 6
SCB-RLY4

CAPACITY
%

IGC1

MGV1

IGC2

MGV2

IGC3

MGV3

0

OFF

OFF

OFF

OFF

OFF

OFF

0

1

ON

OFF

OFF

OFF

OFF

OFF

37

2

ON

ON

OFF

OFF

OFF

OFF

50

3

ON

OFF

ON

OFF

OFF

OFF

75

4

ON

ON

ON

OFF

OFF

OFF

87

5

ON

ON

ON

ON

OFF

OFF

100

Table 71 -- Staged Gas Heat Control Steps (Configuration_HEAT_

SG.CT_HT.ST=

2)

RELAY OUTPUT
STAGE

Heat 1
MBB-RLY8

Heat 2
MBB-RLY7

Heat 3
SCB-RLY1

Heat 4
SCB-RLY2

Heat 5
SCB-RLY3

Heat 6
SCB-RLY4

CAPACITY
%

IGC1

MGV1

IGC2

MGV2

IGC3

MGV3

0

OFF

OFF

OFF

OFF

OFF

OFF

0

1

ON

OFF

OFF

OFF

OFF

OFF

25

2

ON

ON

OFF

OFF

OFF

OFF

33

3

OFF

OFF

ON

OFF

OFF

OFF

50

4

OFF

OFF

ON

ON

OFF

OFF

67

5

ON

OFF

ON

OFF

OFF

OFF

75

6

ON

ON

ON

OFF

OFF

OFF

83

7

ON

ON

ON

ON

OFF

OFF

100

Table 72 -- Staged Gas Heat Control Steps (Configuration_HEAT_

SG.CT_HT.ST=

3)

RELAY OUTPUT
Heat 1
MBB-RLY8

Heat 2
MBB-RLY7

Heat 3
SCB-RLY1

Heat 4
SCB-RLY2

Heat 5
SCB-RLY3

Heat 6
SCB-RLY4

0

IGC1
OFF

MGV1
OFF

IGC2
OFF

MGV2
OFF

IGC3
OFF

MGV3
OFF

1

ON

OFF

OFF

OFF

OFF

OFF

25

2

ON

ON

OFF

OFF

OFF

OFF

33

3

ON

OFF

ON

OFF

OFF

OFF

50

4

ON

ON

ON

OFF

OFF

OFF

58

5

ON

ON

ON

ON

OFF

OFF

67

6

ON

OFF

ON

OFF

ON

OFF

75

7

ON

OFF

ON

ON

ON

OFF

83

8

ON

ON

ON

ON

ON

OFF

92

9

ON

ON

ON

ON

ON

ON

100

STAGE

55

CAPACITY
%
0

Table 73 -- Staged Gas Heat Control Steps (Configuration_HEAT_

SG.CT_HT.ST=

4)

RELAY OUTPUT
STAGE

Heat 1

Heat 2

Heat 3

MBBIRLY8

MBB-RLY7

SCB-RLY1

SCB-RLY2

Heat 4

SCB-RLY3

Heat 5

SCB-RLY4

Heat 6

CAPACITY
%

IGC1

MGV1

IGC2

MGV2

IGC3

MGV3

0

OFF

OFF

OFF

OFF

OFF

OFF

0

1

ON

OFF

OFF

OFF

OFF

OFF

19

2

ON

ON

OFF

OFF

OFF

OFF

25

3

ON

OFF

OFF

OFF

ON

OFF

38

4

ON

ON

OFF

OFF

ON

OFF

44

5

ON

ON

OFF

OFF

ON

ON

50

6

ON

OFF

ON

OFF

OFF

OFF

57

7

ON

ON

ON

OFF

OFF

OFF

63

8

ON

OFF

ON

OFF

ON

OFF

76

9

ON

OFF

ON

ON

ON

OFF

88

10

ON

ON

ON

ON

ON

OFF

94

11

ON

ON

ON

ON

ON

ON

100

RELOCATE
SAT (Supply Air Temperature)
SENSOR FOR
HEATING IN LINKAGE APPLICATIONS
-- On CCN installations employing ComfortID TM terminals, the factory SAT
location must be changed to a new location downstream of the
unit's heating system. The ComfortID terminal controls read
the SAT value for their "proof-of-heat"
sequence before terminals open to Minhnum Heating positions during unit heating
sequence.
Determine a location in the supply duct that will provide a
fairly uniform airflow. Typically this would be a minimum of
5 equivalent duct diameters downstream of the unit. Also, care
should be taken to avoid placing the thermistor within a direct
line-of-sight of the heating element to avoid radiant effects.
Run a new two-wire conductor cable from the control box
through the low voltage conduit into the space inside the building and route the cable to the new sensor location.

end inside the unit control box at the factory leads from MBB
J8 terminals 11 and 12 (PNK) leads. Secure the unattached
PNK leads from the factory harness to ensure no accidental
contact with other terminals inside the control box.
MORNING WARM UP -- Morning Warm Up is a period of
time that assists CCN linkage in opening up downstream zone
dampers for the first heating cycle of a day.
The Morning Warm Up Period is CCN linkage
and is relayed in the following conditions:
•

•

TEMPERING
MODE -- In a vent or cooling mode, the rooftop may encounter a situation where the economizer at mini1hum position is sending cold outside air down the ductwork of
the building. Therefore, it may be necessary to bring heat on to
counter-effect this low supply-air temperature. This is referred
to as the tempering mode.

Table 74 -- IGC LED Indicators

Off
1 Flash

ERROR CODE
Normal Operation
Hardware Failure

Setting up the System -- The relevant set points for Tempering are located at the local display under Setpoints:

2 Flashes

Fan On/Off Delay Modified
Limit Switch Fault

3 Flashes

Fame Sense Fault

4 Flashes
5 Flashes

Five Consecutive

6 Flashes

Ignition Switch Fault
Rollout Switch Fault

7 Flashes

Temperature Compensated Start Mode is active AND Heat
Mode in effect AND LAT is warm enough or is to be
ignored due to placement.
The unit just went into occupied mode and there has been
no cooling mode yet and a heat cycle occurs or was in
progress when the unit went occupied.

In both cases, if and when the heat mode terminates, a heat
cycle has occurred and any subsequent heat cycles will not be
treated as a morning warm up period.

Installing a New Sensor -- A field-provided duct-mount temperature sensor (Carrier P/N 33ZCSENPAT
or equivalent
10 kilo-otnn at 25 C NTC [negative temperature coefficient]
sensor) is required. Install the sensor through the side wall of
the duct and secure.

LED INDICATION
On

mode "2"

ITEM

Limit Switch Faults

Ignition Lockout Fault

8 Flashes

Internal Control Fault

9 Flashes

Software Lockout

NOTES:
1. There is a 3-second pause between error code displays.
2. If more than one error code exists, all applicable error codes
will be displayed in numerical sequence.
3. Error codes on the IGC will be lost if power to the unit is
interrupted.

EXPANSION

CON
POINT

DEFAULT

RANGE

UNITS

T.PRG

Tempering
Purge SASP

-20-80

dF

TEMPPURG

5O

T.CL

Tempering in
Cool SASP

5-75

dF

TEMPCOOL

5

T.V.OC

Tempering Vent
Occ SASP

-20-80

dF

TEMPVOCC

65

T.V.UN

Tempering Vent
Unocc. SASP

-20-80

dF

TEMPVUNC

5O

Operation -- First, the unit must be in a vent mode, a low cool
mode, or a high cool HVAC mode to be considered for a tempering mode. Secondly, the tempering mode is only allowed
when the rooftop is configured for staged gas (Configuration
--_HEA T--_HT. CF=3 ).
If the control is configured for staged gas, the control is in a
vent, low cool, or high cool HVAC mode, and the rooftop control is in a situation where the economizer must maintain a
minimum position, then the evaporator discharge temperature
(EDT) will be monitored. If the EDT falls below a particular
trip point then the tempering mode may be called out:

Re-Using the Factory SAT Sensor -- The factory sensor is
attached to one of the supply fan housings. Disconnect the sensor from the factory harness. Drill a hole insert the sensor
through the duct wall and secure in place.
Attach the new conductor cable to the sensor leads and terminate in an appropriate junction box. Connect the opposite

HVAC mode = "Tempering
56

Vent"

HVACmode
= "Tempering
LoCool"
HVACmode
= "Tempering
HiCool"
Thedecision
making/selection
process
forthetempering
tripsetpointisasfollows:
• If anHVACcoolmode
isineffect,
thentheventtrippointis
•
•
•

T.(Z.
If in a pre-occupied
purge mode (Operating
Modes-+
MODE-+IAQ.P=ON),
then the trip point is T.PRG.
If in an occupied
mode (Operating
Modes-+MODE
---)IAQ.P=ON), then the trip point is T.V.OC.
For all other cases, the trip point is T. EUN.

pressure and calculates the error from set point. This error is
simply the duct static pressure set point minus the measured
duct static pressure. The error becomes the basis for the proportional term of the PID. The routine also calculates the integral
of the error over trine, and the derivative (rate of change) of the
error. A value is calculated as a result of this PID routine, and
this value is then used to create an output signal used to adjust
the VFD to maintain the static pressure set point.
Static pressure reset is the ability to force a lowering of the
static pressure set point through an external control signal.
The unit controls support this in two separate ways, through a 4
to 20 mA signal input wired to the unit's isolator board input
terminals (third party control) or via CCN.

NOTE: The unoccupied economizer free cooling mode does
not qualify as a HVAC cool mode as it is an energy saving
feature and has its own OAT lockout already. The unoccupied
free cooling mode (HVAC mode = Unocc. Free Cool) will
override any unoccupied vent mode from triggering a tempering mode.

When employing the CCN, this feature uses the colrnnunications capabilities of VAV systems with ComfortID TM terminals under linkage. The system dynamically determines and
maintains an optrinal duct static pressure set point based on
the actual load conditions in the space. This can result in a
significant reduction in required fan energy by lowering the set
point to only the level required to maintain adequate airflow
throughout the system.

If OAT is above the chosen tempering set point, tempering
will not be allowed. Additionally, tempering mode is locked
out if any stages of mechanical cooling are present.
A minimum amount of time must pass before calling out
any tempering mode. In effect, the EDT must fall below
the trip point value -1 ° F continuously
for a minrinum of
2 minutes. Also, at the end of a mechanical cooling cycle, there
must be a minrinum 10 minutes of delay allowed before considering tempering during vent mode in order to allow any
residual cooling to dissipate from the evaporator coil.

SETTING
UP THE SYSTEM -- The options
for static
pressure control are found under the Local Display Mode
Configuration-+SP
See Table 75.

Failure to correctly configure SRCF and SRFN when
operating in VFD Bypass mode will result in the indoor fan
motor running continuously. Damage to unit could result.

If the above conditions are met, the algorittun is free to
select the tempering mode (MODETEMP).
If a tempering
mode becomes active, the modulating heat source (staged gas)
will attempt to maintain leaving-air temperature (LAT) at the
tempering set point used to trigger the tempering mode. The
technique for modulation
of set point for staged gas and
hydronic heat is the same as in a heat mode. More information
regarding the operation of heating can be referenced in the
Heating Control section.

Static Pressure Configuration(SRCF)
--This
variable is
used to configure the use of (_l_fortLink TM controls for static
pressure control. There are the following options:
-- There will be no static pressure control by
(_nfortLink
controls. This setting would be used for a constant volume (CV) application when static pressure control is
not required or for a VAV application if there will be third-party
control of the VFD. In this latter case, a suitable means of control must be field installed.

Recovery from a tempering mode (MODETEMP)
will
occur when the EDT rises above the trip point. On any change
in HVACMODE,
the tempering routine will re-assess the
tempering set point which may cause the control to continue or
exit tempering mode.

Additionally, SR(_T must be set to 0 (None) when a unit is
equipped with optional VFD bypass and is operating in Bypass
mode. Failure to change this configuration in Bypass mode will
result in the indoor fan motor running continuously.

Static Pressure Control -- Variable air volume (VAV)
air-conditioning
systems must provide varying amounts of air
to the conditioned space. As air terminals downstream of the
unit modulate their flows, the unit must maintain control over
the duct static pressure in order to accolmnodate the needs of
the terminals and meet the varying combined airflow requirement.

1 (VFD Control) -- This will enable the use of (_n?fortLink
controls for static pressure control via a supply fan VFD.
Static Pressure Fan Control? (SRFN) -- This is automatically set to Yes when SRCF = 1. When the user would like the 4
to 20 mA output to energize the VFD, as opposed to the fan relay, SRFNmay
be set to Yes when SR(_T = 0. When the control turns the fan ON, the control will send the SRMX value of
the 4 to 20 mA signal to the third party VFD control.

A 48/50AK,AY, A3,A5 unit equipped with a duct pressure
control system is provided with a variable frequency drive
(VFD) for the supply fan. The speed of the fan can be controlled directly by the (_l_fortLink TM controls. A transducer is
used to measure duct static pressure. The signal from the transducer is received by the ECB-2 board and is then used in a PID
control routine that outputs a 4 to 20 mA signal to the VFD.

Additionally, SRFN must be set to NO when the unit is
equipped with optional VFD bypass and is operating in Bypass
mode. Failure to change this configuration in bypass mode will
result in the indoor fan motor running continuously.

Generally, only VAV systems utilize static pressure control.
It is required because as the system VAV terminals modulate
closed when less air is required, there must be a means of
controlling airflow from the unit, thereby effectively preventing overpressurization
and its accompanying problems.

Static Pressure Sensor (SRS) -- This variable enables the use
of a supply duct static pressure sensor. This must be enabled to
use (_l_fortLink
controls for static pressure control. If using a
third-party control for the VFD, this should be disabled.
Static Pressure Low Range (SP.LO) -- This is the minimum
static pressure that the sensor will measure. For most sensors
this will be 0 in. wg. The (_nfortLink
controls will map this
value to a 4 mA sensor input.

The three most fundamental configurations for most applications are Configuration--cSP--cSRCF,
which is the static
pressure control type, Configuration-+SP-+SRS,
used to
enable the static pressure sensor, and Configuration-+SP
--+SRSP, the static pressure set point to be maintained.

Static Pressure High Range (SP..H1) -- This is the maximum
static pressure that the sensor will measure. Colrnnonly this
will be 5 m. wg. The (_n_fortLink controls will map this value
to a 20 mA sensor input.

OPERATION
-- On units equipped with a VFD and a proper
static pressure sensor, when SRCF, SRS and SRSP are configured, a PID routine periodically
measures
the duct static
57

Static Pressure Set Point (SRSP) -- This is the static pressure control point. It is the point against
which the
(_l_fortLink
controls compare the actual measured supply
duct pressure for determination of the error that is used for PID
control. Generally one would set SRSP to the minimum value
necessary for proper operation of air terminals in the conditioned space at all load conditions. Too high of a value will
cause unnecessary fan motor power consumption at part-load
conditions and/or noise problems. Too low a value will result in
insufficient airflow.

directly to the 0 to 3 in. wg of reset. Therefore 2 mA reset is
2/16 * 3 in. wg = 0.375 in. wg of reset. If the static pressure set
point (SRSP) = 1.5 in. wg, then the static pressure control point
for the system will be reset to 1.5 - 0.375 = 1.125 in. wg.
When SRRS = 4, the static pressure reset function acts to
provide direct VFD speed control where 4 mA = 0% speed and
20 mA = 100% (SRMN and SRMX will override). Note that
SRCF must be set to 1 (VFD Control), prior to configuring
SRRS = 4. Failure to do so could result in damage to ductwork
due to overpressurization.
This is the recolmnended
approach
if a third party wishes to control the variable speed supply fan.
In effect, this represents a speed control signal "pass through"
under normal operating circumstances. The (_l_fortLink
control system ovemdes the third party signal for critical operation
situations, most notably smoke and fire control.

VFD Minhnum Speed (SRMN) -- This is the minhnum speed
for the supply fan VFD. Typically the value is chosen to maintain a minhnum level of ventilation.
NOTE: Most VFDs have a built-in minimum speed adjustment
which must be configured for 0% when using (_nfortLink
controls for static pressure control.

Static Pressure Reset Ratio (SRRT) -- This option defines
the reset ratio in terms of static pressure versus temperature.
The reset ratio determines how much is the static pressure
reduced for every degree below set point for RAT or SPT.

VFD Maximum Speed (SRMX)
-- This is the maximum
speed for the supply fan VFD. This is usually set to 100%.
VFD Fire Speed Override (SRFS) -- This is the speed that
the supply fan VFD will use during the pressurization, evacuation and purge fire modes. This is usually set to 100%.

Static Pressure Reset Limit (SRLM) -- This option defines
the maximum amount of static pressure reset that is allowed.
This is sometimes called a "clalnp."

Static Pressure Reset Configuration
(SRRS) -- This option
is used to configure the static pressure reset function. When
SRRS = 0, there is no static pressure reset via an analog input.
If the outdoor air quality sensor is not configured (Configuration---_IAQ---_IAQ. (T_OQ.A.
C = 0), then it is possible to use
the outdoor air quality sensor location on the CEM board to
perform static pressure reset via an external 4 to 20 mA input.

NOTE: Resetting static pressure via RAT and SPT is prhnarily
a constant volume application which utilizes a VFD. The reasoning is that there is significant energy savings in slowing
down a supply fan as opposed to running full speed with
supply air reset. Maintaining
the supply air set point and
slowing down the fan has the additional benefit of working
around dehumidification
concerns.

Configuring SRRS = 1 provides static pressure reset based
on this CEM 4 to 20 mA input and ranged from 0 to 3 in. wg.
Wire the input to the CEM using TB6-11 and 12. When SRRS
= 2, there is static pressure reset based on RAT and defined by
SRRTand SRLM. WhenSRRS
= 3, there is static pressure reset based on SPT and defined by SRRTand SRLM.

Static Pressure Reset Economizer
Position (SRE(_) -- This
option effectively resets ECONOM1N to fully occupied ventilation position, to account for the drop in static pressure during
static pressure reset control. The static pressure reset for the
calculation cannot be larger than the supply air static set point
(SPSP).
The calculation is as follows:

Setting SRRS to 1, 2 or 3 will give the user the ability to reset from 0 to 3 in. wg of static pressure. The reset will apply to
the supply static pressure set point. The static pressure reset
function will only act to reduce the static pressure control point.

(Static Pressure Reset/SPSP)

x (ECONOSPR-

ECONOM1N)

As an example, the static pressure set point (SPSP) =
1.5 in. wg. The current static pressure reset is set to 0.5 in. wg.
The settings for ECONOSPR = 50% and ECONOM1N = 20%.

As an example, the static pressure reset input is measuring
6 mA, and is therefore resetting 2 mA (6 mA - 4 mA) of its
16 mA control range.
The 4 to 20 mA range corresponds

Table 75 -- Static Pressure Control Configuration
ITEM
SP

EXPANSION

RANGE

UNITS

CCN POINT

DEFAULT

SUPPLY STATIC PRESS.CFG.

SP.CF
SP.FN

Static Pres. VFD Control?
Static Pres. Fan Control?

0, 1
Yes/No

STATICFG
STATPFAN

SP.S

Static Pressure Sensor

Enable/Disable

SPSENS

SP.LO

Static Press. Low Range

-10 - 0

in. W.C.

SP_LOW

SP.HI

Static Press. High Range

0 - 10

in. W.C.

SP_HIGH

SP.SP

Static Pressure Setpoint

0 -5

in. W.C.

SPSP

SP.MN

VFD Minimum Speed

0 - 100

%

STATPMIN

20

SP.MX

VFD Maximum Speed

0 - 100

%

STATPMAX

100

SP.FS

VFD Fire Speed Override

0 - 100

%

STATPFSO

100

SP.RS

Stat. Pres. Reset Config

0 -4

SPRSTCFG

SP.RT

SP Reset Ratio ("/dF)

0 - 2.00

SPRRATIO

SP.LM
SP.EC
S.PID

SP Reset Limit in iwc (")
SP Reset Econo.Position
STAT.PRESS.PID CONFIGS

0 - 2.00
0 - 100

%

SPRLIMIT
ECONOSPR

SP.TM

Static Press. PID Run Rate

1 - 200

sec

SPIDRATE

2

SP.P

Static Press. Prop. Gain

0 - 100

STATP_PG

20

SP.I
SP.D

Static Press. Intg. Gain
Static Press. Derv. Gain

0 -50
0 - 50

STATP_IG
STATP_DG

2
0

SP.SG

Static Press. System Gain

0 - 50

STATP_SG

1.0

*Some defaults are model number dependent.

58

0*
Yes*
Disable*
0
5
1.5

0
0.2
0.75
5

Therefore,
the amount
to add to the economizer's
ECONOMIN
configuration is: (0.5/1.5) x (50-20) = 10%. In
effect, for the positioning of the economizer, ECONOMIN
would now be replaced by ECONOMIN + 10%.

case, the installer could enter 3.0 in. wg as the supply static
pressure set point and allow the air terminal system to dynamically adjust the supply duct static pressure set point as required.
The system will deter]nine the actual set point required delivering the required airflow at every terminal under the current
load conditions. The set point will always be the lowest value
under the given conditions. As the conditions and airflow set
points at each terminal change throughout the operating period,
the equipment static pressure set point will also change.

Static Pressure PID Config (S.PID)
-- Static pressure PID
configuration can be accessed under this heading in the Configuration--+SP
submenu. Under most operating conditions the
control PID factors will not require any adjustment and the
factory defaults should be used. If persistent static pressure
fluctuations are detected, small changes to these factors ]nay
improve performance. Decreasing the factors generally reduce
the responsiveness
of the control loop, while increasing the
factors increase its responsiveness.
Note the existing settings
before making changes, and seek technical assistance from
Carrier before making significant changes to these factors.

The CCN system must have access to a CCN variable
(SPRESET which is part of the equipment controller). In the
algorithin for static pressure control, the SPRESET value is
always subtracted from the configured static pressure set point
by the equipment controller. The SPRESET variable is always
checked to be a positive value or zero only (negative values are
limited to zero). The result of the subtraction of the SPRESET
variable from the configured set point is limited so that it
cannot be less than zero. The result is that the system will
dynamically deter]nine the required duct static pressure based
on the actual load conditions currently in the space. This eliminates the need to calculate the design supply static pressure set
point. This also saves the energy difference between the design
static pressure set point and the required static pressure.

Static Pressure PID Run Rate (S.PID--cSRTM)
This is the
number of seconds between duct static pressure readings taken
by the (_n_fortLink TM PID routine.
Static Pressure
the proportional
loop.

Plvportional
Gain (S.PID--cSRP)
This is
gain for the static pressure control PID control

Static Pressure Integlwl Gain (S.PID--)SRI)
This is the
integral gain for the static pressure control PID control loop.

Third Party 4 to 20 mA Input -- It is also possible to perform
static pressure reset via an external 4 to 20 mA signal connected to the CEM board where 4 mA corresponds to 0 m. wg of
reset and 20 mA corresponds to 3 in. wg of reset. The static
pressure 4 to 20 mA input shares the same input as the analog
OAQ sensor. Therefore, both sensors cannot be used at the
same thne. To enable the static pressure reset 4 to 20 mA sensor, set (Configuration---_SP---_SRRS)
to Enabled.

Static Pressure Derivative Gain (S.PID-+SRD)
This is the
derivative gain for the static pressure control PID control loop.
Static Pressure System Gain (S.PID--)SRSG)
-- This is the
system gain for the static pressure control PID control loop.
STATIC PRESSURE
RESET OPERATION
--The
(_nfortLink
controls support the use of static pressure reset.
The Linkage Master terminal monitors the primary air damper
position of all the terminals in the system (done through LINKAGE with the new ComfortID TM air terminals).

RELATED POINTS -- These points represent static pressure
control and static pressure reset inputs and outputs. See Table 76.

The Linkage Master then calculates the amount of supply
static pressure reduction necessary to cause the most open
damper in the system to open more than the minimum value
(60%) but not more than the maximum value (90% or negligible static pressure drop). This is a dynamic calculation, which
occurs every two minutes when ever the system is operating.
The calculation ensures that the supply static pressure is always
enough to supply the required airflow at the worst case terminal but never more than necessary, so that the prhnary air
dampers do not have to operate with an excessive pressure
drop (more than required to maintain the airflow set point of
each individual terminal in the system).

Static Pressure mA (SR_
-- This variable reflects the value
of the static pressure
sensor
signal received
by the
(_nfortLink
TM
controls. The value ]nay be helpful in troubleshooting.
Static Pressure mA Trim (SRM.T)
-- This input allows a
modest amount of trhn to the 4 to 20 mA static pressure transducer signal, and can be used to calibrate a transducer.

As the system operates, if the most open damper opens
more than 90%, the system recalculates the pressure reduction
variable and the value is reduced. Because the reset value is
subtracted from the controlling set point at the equipment, the
pressure set point increases and the primary-air dampers close
a little (to less than 90%). If the most open damper closes to
less than 60%, the system recalculates the pressure reduction
variable and the value is increased. This results in a decrease in
the controlling set point at the equipment, which causes the
primary-air dampers to open a little more (to greater than 60%).

Static Pressure Reset (SRRS)
-- This variable reflects the
value of a static pressure reset signal applied from a CCN system. The means of applying this reset is by forcing the value of
the variable SPRESET through CCN.

Static Pressure Reset mA (SRR.M) -- This input reflects the
value of a 4 to 20 mA static pressure reset signal applied to
TB6 terminals 11 and 12 on the CEM board, from a third party
control system.

Supply Fan VFD Speed (S. VFD) -- This output can be used
to check on the actual speed of the VFD. This ]nay be helpful
in some cases for troubleshooting.

Fan Status

Monitoring

GENERALThe A Series (_n_fortLink controls offer the
capability to detect a failed supply fan through either a duct
static pressure transducer or an accessory discrete switch. The
fan stares switch is an accessory that allows for the monitoring
of a discrete switch, which trips above a differential pressure
drop across the supply fan. For any unit with a factory-installed
duct static pressure sensoc it is possible to measure duct
pressure rise directly, which removes the need for a differential
switch. All 48/50AK,AW, A3,A5 units with a factory-installed
supply fan VFD will have the duct static pressure sensor as
standard.

The rooftop
unit has the static pressure
set point
progralrnned into the CCN control. This is the maximum set
point that could ever be achieved under any condition. To
simplify the installation and connnissioning
process for the
field, this system control is designed so that the installer only
needs to enter a lnaxilnum duct design pressure or lnaximum
equipment pressure, whichever is less. There is no longer a
need to calculate the worst case pressure drop at design conditions and then hope that some intermediate condition does not
require a higher supply static pressure to meet the load
conditions. For example, a system design requirement ]nay be
1.2 in. wg, the equipment
]nay be capable of providing
3.0 in. wg and the supply duct is designed for 5.0 in. wg. In this

SETTING UP THE SYSTEM -- The fan stares momtoring
configurations are located in Configuration--gUNIr.
See
Table 77.

59

Table 76 -- Static Pressure Reset Related Points
ITEM

EXPANSION

RANGE

UNITS

CCN POINT

DEFAULT

Inputs
-_ 4-20 -_ SP.M
-_ 4-20 -_ SP.M.T

Static Pressure mA
Static Pressure mA Trim

4-20
-2,0 - +2,0

mA
mA

SP_MA
SPMATRIM

-_ 4-20 -_SP.R.M

Static Pressure Reset mA

4-20

mA

SPRST_MA

0,0

-_ RSET -_SP.RS

Static Pressure Reset

0,0-3,0

in, wg

SPRESET

0,0

Supply Fan VFD Speed

0-100

%

SFAN_VFD

Outputs
-_ Fans -_ S.VFD

Table 77 -- Fan Status Monitoring Configuration
ITEM

EXPANSION

SFS.S

Fan Fail Shuts Down Unit

Yes/No

RANGE

SFS_SHUT

SFS.M

Fan Stat Monitoring

0 -2

SFS_MON

Type

Monitoring of the filter stares switch is disabled in the
Service Test mode and when the supply fan is not colmnanded
on. If the fan is on and the unit is not in a test mode and the
filter status switch reads "dirty" for 2 continuous minutes, an
alert is generated. Recovery from this alert is done through a
clearing of all alarms or after cleaning the filter and the switch
reads "clean" for 30 seconds.

CCN POINT

Fan Stat Monitoring Type (SFS.M) -- This configuration
lects the type of fan stares monitoring to be performed.

se-

NOTE: The filter switch should be adjusted to allow for the
operating cfm and the type of filter. Refer to the accessory
installation instructions for information on adjusting the switch.

0 - NONE -- No switch or monitoring
1 - SWITCH --Use
of the fan status switch
2 - SP RISE -- Monitoring of the supply duct pressure.

Economizer

E The economizer control is used to manage
the outside and return air dampers of the unit to provide ventilation air as well as free cooling based on several configuration
options. This section contains a description of the economizer
and its ability to provide free cooling. See the section on Indoor
Air Quality Control on page 67 for more information on setting
up and using the economizer to perform demand controlled
ventilation (DCV). See the Third Party Control section for a
description on how to take over the operation of the economizer through external control.

Fan Fail Shuts Down Unit (SFS.S)
-- This configuration
will configure the unit to shut down on a supply fan status fail
or shnply alert the condition and continue to run. When configured to YES, the control will shut down the unit if supply fan
stares monitoring fails and the control will also send out an
alarm. If set to NO, the control will not shut down the unit if
supply fan status monitoring fails but will send out an alert.
SUPPLY FAN STATUS MONITORING
LOGIC -- Regardless of whether the user is monitoring a discrete switch or is
monitoring static pressure, the thning for both methods are the
same and rely upon the configuration of static pressure control.
The configuration that determines static pressure control is
Configurafion--)SP--)SRCF.
If this configuration
is set to 0
(none), a fan failure condition must wait 60 continuous seconds
before taking action. If this configuration is 1 (VFD), a fan failure condition must wait 3 continuous minutes before taking
action.

The economizer system also permits this unit to perform
smoke control functions based on external control switch
inputs. Refer to the Smoke Control Modes section for detailed
discussions.
Economizer
control can be based on automatic control
algoritlnns using unit-based set points and sensor inputs. This
economizer control system can also be managed through external logic systems.

If the unit is configured to monitor a fan stares switch
(SFS.M = 1), and if the supply fan colmnanded state does not
match the supply fan status switch for 3 continuous minutes,
then a fan status failure has occurred.
If the unit is configured
(SFS.M = 2), then
•

•

for supply duct pressure

The economizer system is a factory-installed
option. This
unit can also have the following devices installed to enhance
economizer control:
•
•

monitoring

NOTE: All these options require the controls
ule (CEM).

If the supply fan is requested ON and the static pressure
reading is not greater than 0.2 in. wg for 3 continuous
minutes, a fan failure has occurred.
If the supply fan is requested OFF and the static pressure
reading is not less than 0.2 in. wg for 3 continuous minutes, a fan failure has occurred.

Economizer Minimum Position (ECMN) -- The configuration option ECMN is the economizer lninimum position. See
the section on indoor air quality for further information on how
to reset the economizer further to gain energy savings and to
more carefully monitor IAQ problems.

To enable the sensor for dirty filter monitoring
set
Configuration--+UNIT--+SENS--+FLT.S
to ENABLE.
The
state of the filter status switch can be read at Inputs_GEN.I-€
FLT.S. See Table 78.

EXPANSION

Configuration-_UNIT
-_SENS-_FLT.S

Filter
Stat.Sw.Enabled

Inputs-_GEN.I
-+FLT.S

Filter Status Input

Economizer
Maximum Position (ECMX) -- The upper limit of the economizer may be lhnited by setting ECMX
This
value defaults to 98% to avoid problems associated with slight
changes in the economizer damper's end stop over time. Typically this will not need to be adjusted.
Economizer
Trim for Sum Z? (E. TRM) -- Sum Z is the
adaptive cooling control algorittun used for multiple stages
of mechanical
cooling capacity. The configuration
option,
E. TRM is typically set to Yes, and allows the economizer to

Points

RANGE
Enable/
? Disable
DRTY/CLN

CCN
POINT
FLTS

mod-

Economizer
Installed? (ECEN)
-- If an economizer is not
installed or is to be completely disabled then the configuration
option ECEN should be set to No. Otherwise in the case of an
installed economizer, this value must be set to Yes.

E The unit can be equipped with a
field-installed accessory dirty filter switch. The switch is located
in the filter section. If a dirty filter switch is not installed, the
switch input is configured to read "clean" all the time.

ITEM

expansion

SETTING UP THE SYSTEM -- The economizer configuration options are under the Local Display Mode Configuration
--_ECON. See Table 79.

Dirty Filter Switch

Table 78 -- Dirty Filter Switch

Outside air humidity sensor
Return air humidity sensor

ENA

FLTS

6O

modulate
to thesamecontrolpoint(SumZ) thatis usedto
controlcapacity
staging.
Theadvantage
islowercompressor
cyclingcoupled
withtightertemperature
control.
Setting
this
optiontoNowill cause
theeconomizer,
if it isabletoprovide
freecooling,to opento the Economizer
Max.Position
(ECMX)during
mechanical
cooling.
ECONOMIZER
OPERATION
-- Therearefourpotential
elements
whichareconsidered
concurrently
whichdetermine
whether
theeconomizer
isabletoprovide
freecooling:
1. Drybulbchangeover
(outside-air
temperature
qualification)
2. Economizer
switch
(discrete
control
inputmonitoring)
3. Economizer
changeover
select(E.SELeconomizer
changeover
select
configuration
option)
4. Outdoor
dewpoint
lhnitcheck(requires
aninstalled
outdoorrelative
humidity
sensor
installed)

85

90

95

I00

105 I10

Dry Bulb Changeover
(OAT.L) -- Outside-air
temperature
may be viewed under remperatures---)AIR.
T_OAT. The control constantly compares its outside-air temperature reading
against the high temperature OAT lockout (OAT.L). If the temperature reads above OAT.L, the economizer will not be allowed to perform free cooling.
Economizer
Switch (ECSW)
-- The function of this switch
is determined by (bnfiguration
-+ECON--cECSW.
The state
of the corresponding
economizer input can be viewed under
Inputs" _GEN.. I--cE.SW.

35

When set to EC.SW= 0, the switch is disabled. When set to
EC.SW=
1, the economizer switch functions to enable/disable
the economizer. When set to EC.SW = 2, the switch functions
as an IAQ override switch. This functions just like the discrete
IAQ input Inputs--)AIR.Q--clAQ.I
when (bnfiguration
--€IAQ---)AQ. CF--clQ.L 4--2 (IAQ Discrete Override). See the
Indoor Air Quality Control section for more information.

CONTROL

--

This

Fig. 10 --

= 1

Differential

E.SEL

=2

Outdoor Enthalpy

E.SEL

=3

Differential

configuration

Psychrometric

Chart

for

OA.E.C

= 1

Honeywell

A Curve

OA.E.C

= 2

Honeywell

B Curve

OA.E.C

= 3

Honeywell

C Curve

OA.E.C

= 4

Honeywell

D Curve

OA.E.C

= 5

custom enthalpy curve

If the user selects OA.E. C = 5, a direct compare of outdoor
enthalpy versus an enthalpy set point is done. This outdoor
enthalpy
set point lhnit is configurable,
and is called
(bnfiguration
-¢ECON-cOA.EN.

Dry Bulb Changeover
Changeover

Enthalpy

CONTROL POINT
(approx Deg) AT 50% RH
73
68
63
58

Enthalpy Control

Economizer
Changeover
Select (E.SEL) -- The control is
capable of performing
any one of the following changeover
types in addition to both the dry bulb lockout and the external
switch enable input:
E.SEL = 0
none
E.SEL

CURVE

A
B
C
D

When (bnfiguration-cE(DN-cEC.SW=l
and Inputs--€
GEN..I--_E.SW=
No, free cooling will not be allowed.
Economizer
Control Type (E.TYP)
should not be changed.

40
45 50 55 60 65 70 7'5 80 85 90 95 100 105 II0
DRY BULB TEMPERATURE
(APPROXIMATE)-FAHRENHEIT

Changeover

Depending on what (bnfiguration--cECON_OA.E.C
is
configured for, if the outdoor enthalpy exceeds the Honeywell
curves or the outdoor enthalpy compare value ((bnfiguration
-+ECON_OA.EN),
then free cooling will not be allowed.

Differential D1T Bulb Changeover
-- As both return air and
outside air temperature sensors are installed as standard on
these units, the user may select this option, E.SEL = 1, to
perform a qualification of return and outside air in the enabling
and disabling of free cooling. If this option is selected and
outside-air temperature is greater than return-air temperature,
free cooling will not be allowed.

Diff'erential Enthalpy Changeover
-- This option compares
the outdoor-air enthalpy to the return air enthalpy and chooses
the option with the lowest enthalpy. This option should be
used in climates with high humidity conditions. This option
uses both humidity sensors and dry bulb sensors to calculate
the enthalpy of the outdoor and return air. An accessory
outdoor air humidity sensor (OR!-LS) and return air humidity
sensor (RRH.S) are used. The outdoor air relative humidity
sensor config (OR!-LS) and return air humidity sensor config
(Configuration--cUNIT--cSENS--cRRI-L.S)
must be enabled.

Outdoor Enthalpy Changeover-This option should be used
in climates with higher humidity conditions. The A Series
control can use an enthalpy switch or enthalpy sensor, or the
standard installed outdoor dry bulb sensor and an accessory
relative humidity sensor to calculate the enthalpy of the air.
Setting Configuration-+ECON-+E.SEL
= 2 requires that
the user configure
(bnfiguration-cECON_OA.E.(;
the
Outdoor Enthalpy Changeover Select, and install an outdoor
relative humidity sensor. Once the sensor is installed, enable
(bnfiguration--cECON_ORH.S,
the outdoor relative humidity sensor configuration option.

Outdoor Dewpoint Limit Check -- If an outdoor relative
humidity sensor is installed, then the control is able to calculate
the outdoor air dewpoint temperature and will compare this
temperature
against the outside air dewpoint temperature
limit configuration (Configuration--cECON--_,O.DEW).
If the
outdoor air dewpoint temperature is greater than O.DEW, then
free cooling will not be allowed. Figure 11 shows a horizontal
limit line in the custom curve of the psychrometric
chart. This
is the outdoor air dewpoint limit boundary.

If the user selects one of the Honeywell curves, A,B,C or D,
then OA.E.C options 1-4 should be selected. See Fig. 10 for a
diagram of these curves on a psychrometric chart.

61

Table 79 -- Economizer Configuration
ITEM
EC.EN
EC.MN
EC.MX
E.TRM
E. SEL
OA.E.C
OA.EN
OAT.L
O.DEW
ORH.S
E. TYP
EC.SW
E. CFG
E.P.GN
E.RNG
E.SPD
E.DBD
UEFC
FC.CF
FC. TM
FC.L.O

EXPANSION
Economizer Installed?
Economizer Min.Position
Economizer Max.Position
Economzr Trim For SumZ ?
Econ ChangeOver Select
OA Enthalpy ChgOvr Selct
Outdr.Enth Compare Value
High OAT Lockout Temp
OA Dewpoint Temp Limit
Outside Air RH Sensor
Economizer Control Type
Economizer Switch Config
ECON.OPERATION
CONFIGS
Economizer Prop.Gain
Economizer Range Adjust
Economizer Speed Adjust
Economizer Deadband
UNOCC.ECON.FREE
COOLING
Unoc Econ Free Cool Cfg
Unoc Econ Free Cool Time
Un.Ec.Free Cool OAT Lock

Table

RANGE
Yes/No
O- 100
O- 100
Yes/No
0-3
1-5
18 - 28
-40 - 120
50 - 62
Enable/Disable
1-3
0-2

UNITS

CCN POINT

DEFAULT

ECON ENA
ECONOMIN
ECONOMAX
ECONTRIM
ECON SEL
OAEC SEL
OAEN CFG
OAT LOCK
OAD-EWC FG
OARHSENS
ECON CTL
ECOS_/CFG

Yes
5
98
Yes
0
4
24
60
55
Disable

0.7 - 3.0
0.5- 5
0.1 - 10
0.1 -2

EC
EC
EC
EC

PGAIN
RANGE
SPEED
DBAND

1
2.5
0.75
0.5

0-2
0 - 720
40 - 70

UEFC CFG
UEFCTIME
UEFCNTLO

o
12o
5o

%
%

I

d?

g

to the occupied cooling set point. Once the need for cooling has
been satisfied during this cycle, the fan will be stopped.
Configuring the economizer for Unoccupied Economizer
Free Cooling is done in the UEFC group. There are three
configuration options, FC CF, FC TM and FCLO.
Unoccupied
Economizer
Free Cooling Configuration
(F(2: CF) -- This option is used to configure the type of unoccupied economizer free cooling control that is desired.
0 = disable unoccupied economizer free cooling
1 = perform unoccupied economizer free cooling as available
during the entire unoccupied period.
2 = perform unoccupied economizer free cooling as available,
FC TM minutes before the next occupied period.
Unoccupied Economizer Free Coolin_ Time Configuration
(FC TM) -- This option is a configurable time period, prior to
the next occupied period, that the control will allow unoccupied economizer free cooling to operate. This option is only
applicable when FCCF = 2.

Custom Psychrometric
Curves -- Refer to the psychrometric
chart and the standard Honeywell A-D curves in Fig. 10. The
curves start from the bottom and rise vertically, angle to the left
and then fold over. This corresponds to the limits imposed by
dry bulb changeover,
outdoor
enthalpy
changeover
and
outdoor dewpoint limiting respectively. Therefore, it is now
possible to create any curve desired with the addition of one
outdoor
relative
humidity
sensor and the options
for
changeover now available. See Fig. 11 for an example of a
custom curve constructed on a psychrometric chart.
UNOCCUPIED
ECONOMIZER
FREE COOLING -- This
Free Cooling function is used to start the supply fan and use
the economizer
to bring in outside air when the outside
temperature is cool enough to pre-cool the space. This is done
to delay the need for mechanical cooling when the system
enters the occupied period. This function requires the use of a
space temperature sensor.
When configured, the economizer will modulate during an
unoccupied period and attempt to maintain space temperature

IC°,,"mC°;"t

Outside Enthalpy]
Changeover
I
default 24,0
J
De.point
default 55.0dF

[]

[]

Fig. 11 -- Custom Changeover Curve Example

62

Unoccupied
Economizer
Free Cooling
Outside Lockout
Temperature
(FC:LO)
-- This configuration
option allows
the user to select an outside-air temperature below which unoccupied free cooling is not allowed. This is further explained in
the logic section.

cooling" is located at Run Status--+VIEW--+EC:C:P
the economizer control point.

The control selects set points differently, based on the
control type of the unit. This control type can be found at
Configuration--+UNIT-+C.
TYP There are 6 types of control.
C TYP = 1
VAV-RAT
C TYP = 2
VAV- SPT

Unoccupied
Economizer Free Cooling Logic -- The following qualifications that must be true for unoccupied free cooling
to operate:
•
•
•
•
•
•
•
•
•
•
•
•
•
If

C
C
C
C

Unit configured for an economizer
Space temperature
sensor enabled and sensor reading
within limits
Unit is in the unoccupied
mode
FC:CF set to 1 or FC:CF set to 2 and control is within
FC TM minutes of the next occupied period
Not in the Temperature
Compensated
Start Mode
Not in a cooling mode
Not in a heating mode
Not in a tempering mode
Outside-air temperature
sensor reading within limits
Economizer
would be allowed to cool if the fan were
requested and in a cool mode
OAT > FC:LO (1.0 ° F hysteresis applied)
Unit not in a fire smoke mode
No fan failure when configured to for unit to shut down
on a fan failure
all of the above conditions are satisfied:

TYP
TYP
TYP
TYP

=
=
=
=

3
4
5
6

TSTAT Multi-Staging
TSTAT 2 Stage
SPT Multi-Staging
SPT 2 Stage

If the economizer
EC.C.P = O.

is not allowed

to do free cooling, then

If the economizer is allowed to do flee cooling and the
Unoccupied
Free Cooling Mode is ON, then ECCP
=
Setpoints--+SASP
+ Inputs'--+RSET--+SA.S.R.
If the economizer is allowed to do free cooling and the
Dehumidification
mode is ON, then EC.C.P = the Cooling
Control Point (Run Status--+VIEW_,CZ.
C.P).
If the C TYP is either 4 or 6, and the unit is in a cool mode,
then

Unoccupied Economizer Free Cooling will start when both of
the following conditions are true:
{SPT > (OCSP + 2)} AND {SPT > (OAT + 8)}
The Unoccupied
Economizer
Free Cooling Mode
when either of the following conditions are true:

This is

If Stage = 0

EC.C.P = the Cooling Control
Status-g VIEW_,C Z. C.P)

If Stage = 1

53.0 + economizer
below)

suction pressure

reset (see

If Stage = 2

48.0 + economizer
below)

suction pressure

reset (see

NOTE: To check the current
_,Cool _,CUR.S.

will stop

cooling

Point

stage go to Run

(Run

Status

If the C TYP is either 1,2,3 or 5, and the unit is in a cool
mode, then ECCP = the Cooling Control Point (Run Status--+
VIEW_'CZ.
CP).

{SPT < OCSP} OR {SPT < (OAT + 3)} where SPT = Space
Temperature and OCSP = Occupied Cooling Set Point.
When the Unoccupied Economizer Free Cooling mode is
active, the supply fan is turned on and the economizer damper
modulated to control to the supply air set point (Setpoiuts-+
SASP) plus any supply air reset that may be applied (Inputs'--+
RSE T--+SA.S.R ).
ECONOMIZER
OPERATION
CONFIGURATION
-- The
configuration
items in the E.CTG
menu group affect how
the economizer
modulates
when attempting
to follow an
economizer cooling set point. Typically, they will not need
adjustment. In fact, it is strongly advised not to adjust these
configuration
items from their default settings without first
consulting a service engineering representative.

Economizer
Suction
Pressure
Reset
for
Two-Stage
Cooling-If the unit's control type is set to either 2-stage thermostat or 2-stage space temperature control, then there is no
cooling control point. Stages 1 and 2 are brought on based on
demand, irrespective of the evaporator discharge temperature.
In this case, the economizer monitors suction pressure and
resets the economizer control point accordingly in order to
protect the unit from freezing. For those conditions when the
economizer opens up fully but is not able to make set point, and
then a compressor comes on, it is conceivable that the coil
might freeze. This can be indirectly monitored by checking suction pressure. Rather than fail a circuit, the control will attempt
to protect the unit by resetting the economizer control point
until the suction pressure rises out of freezing conditions.

In addition, the economizer cooling algorithm is designed to
automatically
slow down the economizer actuator's rate of
travel as outside air temperature decreases.
ECONOMIZER
DIAGNOSTIC
HELP -- Because there are
so many conditions which might disable the economizer from
being able to provide free cooling, the control has a display
table to identify these potentially disabling sources. The user
can check ACTV, the "Economizer
Active" flag. If this flag is
set to Yes there is no reason to check DISA (Economizer
Disabling Conditions). If the flag is set to No, this means that at
least one or more of the flags under the group DISA are set
to Yes and the user can discover what is preventing the economizer from performing free cooling by checking the table.

If either circuit's suction pressure drops to within 5 psig
of the low suction pressure trip point, the control will start
adding reset to the economizer control point if it is active. It
will be possible to reset the control point upwards, 10 degrees
(2 degrees per psig), between the low suction pressure trip
point of 52 psig for 48/50AJ,AK,AW, AY units or 93 psig for
48/50A2,A3,A4,A5
units. If this does not work, and if the suction pressure drops below the trip point, then the control will
further reset the control point 1 degree every 15 seconds up to a
maximum of 10 degrees. The resulting effect will be to warm
up the mixed air entering the evaporator, thereby raising the
suction pressure.

The economizer's
reported
and commanded
positions
are also viewable, as well as outside air temperature, relative
humidity, enthalpy and dew point temperature.

Building Pressure Control E The

building pressure
control sequence provides control of the pressure in the building through the modulating flow rate function of the modulating power exhaust option. This function also provides control
of the constant volume 2-stage power exhaust option.
BUILDING
PRESSURE
CONFIGURATION
-- The building pressure configurations are found at the local display under
Configuration--+BP.
See Table 81.

The following information can be found under the Local
Display Mode Run Status--+ECDN.
See Table 80.
Economizer
Control Point Determination
Logic -- Once the
economizer is allowed to provide free cooling, the economizer
must determine exactly what set point it should try to maintain.
The set point the economizer attempts to maintain when "free
63

Table 80 -- Economizer Run Status Table
ITEM
ECN. P
ECN. C
ACTV
DISA
UNAV
R.EC.D
DBC
DEW
DDBC
OAEC
DEC
EDT
OAT
FORC
SFON
CL OF
OAQL
HELD
DH.DS
O.AIR
OAT
OA.RH
OA.E
OA.D. T

Building Pressure Config (BRCF) -- This
lects the type of building pressure control.
•
•
•
•

WRITE STATUS

EXPANSION
0 100 RANGE
0_100
YES/NO

Economizer
Act.Curr. Pos.
Economizer
Act.Cmd. Pos.
Economizer
Active ?
ECON DISABLING
CONDITIONS
Econ Act. Unavailable?
Remote Econ. Disabled?
DBC - OAT Lockout?
DEW - OA Dewpt.Lockout?
DDBD- OAT > RAT Lockout?
OAEC- OA Enth Lockout?
DEC - Diff. Enth.Lockout?
EDT Sensor Bad?
OAT Sensor Bad ?
Economizer
Forced ?
Supply Fan Not On 30s ?
Cool Mode Not In Effect?
OAQ Lockout in Effect ?
Econ Recovery Hold Off?
Dehumid. Disabled Econ.?
OUTSIDE AIR INFORMATION
Outside Air Temperature
Outside Air Rel. Humidity
Outside Air Enthalpy
Outside Air Dewpoint Temp

YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO

I
configuration

dF

se-

ECONOPOS
ECONOCMD
CCN POINT
ECACTVE

forcible

ECONUNAV
ECONDISA
DBC STAT
DEW- STAT
DDBCSTAT
OAECSTAT
DEC_STAT
EDT_STAT
OAT STAT
ECONFORC
SFONSTAT
COOL OFF
OAQLOCKD
ECONHELD
DHDISABL
dF
%

OAT
OARH
OAE
OADEWTMP

forcible
forcible

algorithin as to whether the unit has 4 or 6 motors to control.
The motors are controlled by three power exhaust relays A, B,
and C. These relay outputs are located at the local display under Ou_outs---_FANS---_PE.A,B,
C

BR(T
= 0, No building pressure control
BR(T
= 1, constant volume two-stage power exhaust
based on economizer position
BR(T
= 2, lnultiple stage building
pressure
control
based on a building pressure sensor
BR(T
= 3, VFD building pressure control based on a
building pressure sensor

The following table illustrates the number
relay is in control of based on BRMT:
BP.MT

Building Pressure PID Run Rate (BRRT) -- This configuration selects the run thne of the PID algorithn. This configuration is only active when BRCF = 3. It is recolrnnended that this
value not be changed
without
guidance
from Service
Engineering.

PE A Relay

PE B Relay

1 (4motors)

1 Motor

2Motors

2 (6motors)

1 Motor

2Motors

of motors each

PE

C Relay
1 Motor

3Motors

Building Pressure Sensor (BRS) -- This configuration
allows the reading of a building pressure sensor when enabled.
This is automatically enabled whenBRCF
= 2 or 3.
Building Pressure (+/-) Range (BRR) -- This configuration
establishes the range in in. wg that a 4 to 20 mA sensor will be
scaled to. The control only allows sensors that measure both
positive and negative pressure.

Building Pressure Proportional Gain (BRP) -- This configuration selects the proportional gain of the PID algorithin. This
configuration is only active when BRCF = 3. It is recolrnnended that this value not be changed without guidance from Service
Engineering.
Building Pressure Integral
selects the integral gain of
is only active when BRCF
ue not be changed without

%
I % NITS

Building Pressure SETP (BRSP)
-- This set point is the
building pressure control set point. If the unit is configured for
modulating building pressure control, then this is the set point
that the control will control to.

Gain (BR1) -- This configuration
the PID algorithin. This configuration
= 3. It is recolrnnended that this valguidance from Service Engineering.

Power Exhaust on Setp. 1 (BRP1)
-- When configured for
building pressure control type BRCF = 1 (constant volume twostage control), the control will turn on the first power exhaust
fan when the econornizer's position exceeds this set point.

Building Pressure Derivative Gain (BRD) -- This configuration selects the derivative gain of the PID algorithin. This configuration is only active when BRCF = 3. It is recolrnnended
that this value not be changed without guidance from Service
Engineering.

Power Exhaust on Setp.1 (BRP2)
-- When configured for
building pressure control type BRCF = 1 (constant volume twostage control), the control will turn on the second power exhaust
fan when the economizer's position exceeds this set point.

Building Pressure Set Point Offset (BRSO) -- This configuration is the value below the building pressure set point to which
the building pressure must fall in order to turn offpower exhaust
control. This configuration is only active when BRCF = 3.

Modulating PE Algorithin Select (BRSL) -- This configuration
selects the algorithin used to step the power exhaust stages. This
lnust be set to 1 at all thnes. The other selections are not used.

Building Pressure Minhnurn Speed (BRMN) -- This configuration is the minilnurn allowed VFD speed during building pressure control. This configuration is only active when BRCF = 3.

Building Pressure PID Evaluation Time (BP. TM)
-This
configuration is the run time rate of the multiple stage (lnodulating) power exhaust algorithin (BR(T=2).

Building Pressure Maxhnurn Speed (BRMX) -- This configuration is the rnaxilnurn allowed VFD speed during building
pressure control. This configuration is only active when BRCF

Building Pressure Threshold Adjustment (BRZG)
-- This
configuration is not used. It currently has no effect on building
pressure control.

=3.

High Building Pressure Level (BRHP)
-- This configuration is the threshold level above the building pressure set point
used to control stages of power exhaust when BRSL=I.

VFD Fire Speed (BRFS) -- This configuration is the VFD
speed ovemde when the control is in the purge or evacuation
slnoke control modes. This configuration is only active when
BRCF = 3.

Low Building Pressure Level (BRLP) -- This configuration
is the threshold level below the building pressure set point used
to control stages of power exhaust when BRSL=I.

Power Exhaust Motors (BRMT) -- This configuration is machine dependent and instructs the building pressure control

64

CONSTANT
VOLUME2-STAGE
CONTROL
(BRCF= 1)
OPERATION
-- Twoexhaust
fanrelays
willbeturned
onand
offbased
oneconomizer
position.
Thetwotripsetpointsare

The number of power exhaust stages available for this control algorithin is a function of the number of motors it supports.
This number of motors is defined by the Configuration-9BP
-9BRMT configuration. Table 83 illustrates the staging tables
for this control algorithin based on BRMT.

BRP! and BRP2. If the economizer is greater than or equal
to BRP1, then power exhaust stage 1 is requested and a
60-second thner is initialized. If the economizer is 5% below
theBRP1, then power exhaust stage 1 is turned off. Also, if the
economizer position is less than BRP1 and the 60-second timer
has expired, power exhaust stage 1 is turned off. The same
logic applies to the second power exhaust stage, except the
BRP2 trip point is monitored. If the economizer position is
greater than or equal to BRP2, then power exhaust stage 2
is energized and a 60-second timer is initialized. If the economizer is 5% below the BRP2 the second power exhaust
stage turned off. If the economizer is less than BRP2 and the
60-second thner has expired, second stage power exhaust is
turned off.

The following configurations are used in the controlling
building pressure with this algorithin:
•
•
•

Configuration-9BP-9B.CFG-9BRHP
high threshold level)
Configuration-9BP-9B.CFG-9BRLP
low threshold level)
Configuration-9BP-9B.
CFG-9BR
timer)

of

(building

pressure

(building

pressure

TM (building

pressure

This control function is allowed to add or select power exhaust stages at any time, except that a delay time must expire
after a stage is added or subtracted. Any time a stage change is
made, a timer is started which delays staging for 10 * BRTM
seconds. The default for BRTM
is 1, therefore the delay
between stage changes is set to 10 seconds.

For BRCF=I,
the Table 82 illustrates the power exhaust
stages 1 and 2, relay combinations based upon Configuration
-9BRMT (4 or 6 motors).
MULTIPLE
POWER
EXHAUST
STAGE
BUILDING
PRESSURE
CONTROL
(BRCF
= 2) OPERATION
-Building pressure control is active whenever the supply fan is
running. The control algoritlnn to be used (BRSL=I) is a timed
threshold technique for bringing stages of power exhaust on
and off.

The logic to add or subtract a stage of power
follows:

exhaust is as

If building pressure (Pressures-9AIR.P-9BP)
is greater
than the building pressure set point (Configuration-9
BP-gBPSP)
plus the building pressure high threshold level
(Configuration-gBP-gB.CFG-gBRHP)
add a stage of
power exhaust.

Table 81 -- Building Pressure Configuration
ITEM
BP
BP.CF
BP.RT
BP.P
BP.I
BP.D
BP.SO
BP.MN
BP.MX
BP.FS
BP.MT
BP.S
BP.R
BP.SP
BP.PI
BP.P2
B.CFG
BP.SL
BP.TM
BP.ZG
BP.HP
BP.LP

EXPANSION
BUILDING PRESS. CONFIG

RANGE

Building Press. Config
Bldg.Pres.PID Run Rate
Bldg. Press. Prop. Gain
Bldg.Press.lnteg.Gain
Bldg.Press.Deriv.Gain
BP Setpoint Offset
BP VFD Minimum Speed
BP VFD Maximum Speed
VFD/Act. Fire Speed/Pos.
Power Exhaust Motors
Building Pressure Sensor
Bldg Press (+/-) Range
Building Pressure Setp.
Power Exhaust On Setp.1
Power Exhaust On Setp.2
BP ALGORITHM CONFIGS
Modulating PE AIg. Slct.
BP PID Evaluation Time

0-3
5-120
0-5
0-2
0-5
0.0 - 0.5
0-100
0-1O0
0-1O0
1-2
Enable/Dsable
0 - 1.00
-0.25 -> 0.25
0 - 100
0 - 100

BP Threshold Adjustment
High BP Level
Low BP Level

0.1 - 10.0
0 - 1.000
0 - 1.000

1-3
0 - 10

UNITS

CCN POINT

"H20
"H20
%
%

BLDG_CFG
BPIDRATE
BLDGP_PG
BLDGP_IG
BLDGP_DG
BPSO
BLDGPMIN
BLDGPMAX
BLDGPFSO
PWRM
BPSENS
BP_RANGE
BPSP
PES1
PES2

O*
10
0.5
0.5
0.3
0.05
10
100
1O0
1*
Dsable*
0.25
0.05
35
75

min

BPSELECT
BPPERIOD

1
1

BPZ_GAIN
BPHPLVL
BPLPLVL

1
0.05
0.04

sec

"H20
%
%
%

•Some configurations are machine dependent.

Table

82 -- Power

Exhaust

Staging

(BP.CF=

1)

BP.MT= 1 (4 motors)
Power Exhaust Stage 0
Power Exhaust Stage 1
Power Exhaust Stage 2

PE.A
OFF
OFF
ON

PE.B
OFF
ON
ON

PE.C
OFF
OFF
ON

BP.MT= 2 (6 motors)
Power Exhaust Stage 0
Power Exhaust Stage 1
Power Exhaust Stage 2

PE.A
OFF
OFF
ON

PE.B
OFF
OFF
ON

PE.C
OFF
ON
ON

65

DEFAULT

Table 83 -- Power Exhaust Staging (BP.CF= 2)
PE.A

PE.B

PE.C

Power Exhaust Stage 0

BP.MT=

1 (4 motors)

OFF

OFF

OFF

Power Exhaust Stage 1

ON

OFF

OFF

Power Exhaust Stage 2

OFF

ON

OFF

Power Exhaust Stage 3
Power Exhaust Stage 4

ON
ON

ON
ON

OFF
ON

Bt_.MT= 2 (6 motors)

PE.A

PE.B

PE.C

Power Exhaust Stage 0

OFF

OFF

OFF

Power Exhaust Stage 1

ON

OFF

OFF

Power Exhaust Stage 2

OFF

ON

OFF

Power Exhaust Stage 3
Power Exhaust Stage 4

ON
ON

ON
OFF

OFF
ON

Power Exhaust Stage 5

OFF

ON

ON

Power Exhaust Stage 6

ON

ON

ON

•

If building pressure (Pressures-cAIR.P-cBP)
is less than
the
building
pressure
set point
((bnfiguration--+
BP--+BPSP)
minus the building pressure low threshold
level ((bnfiguration--+BP--+B.(TG--+BRLP)
subtract
a
stage of power exhaust.
VFD POWER EXHAUST
BUILDING
PRESSURE
CONTROL (BR(T = 3)--A
4 to 20mA analog output from
Economizer Control Board 1 (ECB-1, AO1) is provided as a
speed reference
for a field-installed
VFD power exhaust
accessory. If building pressure (Pressures---_AIR.P --+BP) rises
above the building pressure set point (BRSP) and the supply
fan is on, then building pressure control is initialized. Thereafter, if the supply fan relay goes off or if the building pressure
drops below the BRSP minus the building pressure set point
offset (BRSO) for 5 continuous minutes, building pressure
control will be stopped. The 5-minute timer will continue to reinitialize if the VFD is still colrnnanded to a speed > 0%. If the
building pressure falls below the set point, the VFD will slow
down automatically.
Control is performed with a PID loop

Smoke Purge -- TB6-13 and 15
Each mode must be energized individually on discrete inputs and the corresponding
alarm is initiated when a mode is
activated. The fire system provides a normally closed dry contact closure. Multiple smoke control inputs, sensed by the control will force the unit into a Fire Shutdown mode.
FIRE-SMOKE
INPUTS -- These discrete
found on the local display under Inputs-cFIRE
ITEM
FIRE
FSD
PRES
EVAC
PURG

K = 1000 * BRRT/60 (normalize the PID control for run
rate)
P = K * BRP * (error)
I = K * BRI * (error) + 'T' calculated last time through the
PID

VFD
BRMX%)

speed reference
=P + I+ D

(clamped

BRMN

and

Control Modes -- There are four smoke control modes that can be used to control smoke within areas serviced by the unit: Pressurization mode, Evacuation
mode,
Smoke Purge mode, and Fire Shutdown. Evacuation, Pressurization and Smoke Purge modes require the Controls Expansion Board (CEM). The Fire Shutdown input is located on the
main board (MBB) on terminals TB5-10 and 11. The unit may
also be equipped with a factory-installed
remm air smoke detector that is wired to TB5-10 and 11 and will shut the unit
down if a smoke condition is determined.
Field-monitoring
wiring can be connected to terminal TB5-8 and 9 to monitor
the smoke detector. Inputs on the CEM board can be used to
put the unit in the Pressurization, Evacuation,
and Smoke
Purge modes. These switches or inputs are connected to TB6 as
shown below. Refer to Major System Components section on
page 101 for wiring diagrmns.
Pressurization -- TB6-12 and 13
-- TB6-13

PO
CCN
NT STATUS
WRITE

ALRM/NORMIFSD
ALRM/NORMiPRES
ALRM/NORM EVAC
ALRM/NORM PURG

forcible
forcible
forcible
forc b e

Smoke Purge Mode -- This mode attempts to draw out
smoke from the space after the emergency condition. Opening
the economizer (thereby closing the return-air damper), turning
on both the power exhaust and indoor fan will evacuate smoke
and bring in fresh air.
AIRFLOW
CONTROL
DURING
THE FIRE-SMOKE
MODESAll non-smoke
related control outputs will get
shut down in the fire-smoke modes. Those related to airflow
will be controlled as explained below. The following matrix
specifies all actions the control shall undertake when each
mode occurs (outputs are forced internally with CCN priority
number 1 -"Fire"):

Smoke

Evacuation

RANGE

Evacuation Mode -- This mode attempts to lower the pressure of the space to prevent infiltrating an adjacent space with
its smoke. Closing the economizer (thereby opening the returnair damper), turning on the power exhaust and shutting down
the indoor fan decrease pressure in the space.

last time through

between

I

be

Pressurization
Mode -- This mode attempts to raise the pressure of a space to prevent smoke infiltration from an adjacent
space. Opening the economizer (thereby closing the return air
damper), shutting down power exhaust and turning the indoor
fan on will increase pressure in the space.

Error = BP - BRSP

* (error - error computed

EXPANSION

IFIRE-SMOKE INPUTS
IFire Shutdown Input
pressurization
Input
IEvacuation Input
]Smoke Purge Input

can

Fire Shutdown Mode -- This mode will cause an ilrnnediate
and complete shutdown of the unit.

where

D = K * BRD
the PID)

I

inputs

DEVICE
Economizer
Indoor Fan -VFD
Power Exhaust
Heat Interlock
Relay

PRESSURIZATION

PURGE

EVACUATION

100%

100%

0%

0%

ON/FSO*

ON/FSO*

OFF

OFF

OFF

ON/FSO*

ON/FSO*

OFF

ON

ON

OFF

OFF

*"FSO" refers to the supply VFD fire speed override
speed.

and 14

66

FIRE
SHUTDOWN

configurable

RELEVANT

ITEMS

The economizer's
commanded
Outputs" -+E CON-+E CN. C

output

can

be

found

configurable amount, which
Quality Low Limit (DAQ.L).

in

The configurable fire speed override
Configuration --+SP --+SRFS.

for supply fan VFD is in

The supply fan relay's commanded
Outputs'--+FANS--+S.FAN.

output

can be found

in

The supply fan VFD's colmnanded
Outputs--+FANS --+S.VFD.

speed can be found

in

is referred

to as Differential

Air

If OAQ is not being measured, OAQ can be manually configured. It should be set at around 400 to 450 ppm or measured
with a handheld sensor during the colrunissioning of the unit.
The OAQ reference level can be set using the OAQ Reference
Set Point (OAQ. U). When the differential between IAQ and
OAQ reaches the configurable Diff. Air Quality Hi Limit
(DAQ.H), then the economizer position will be ECMN.
When the IAQ-OAQ
differential is between DAQ.L and
DAQ.H, the control will modulate the damper between IAQ.M
and ECMN
as shown in Fig. 12. The relationship is a linear
relationship
but other non-linear options can be used. The
damper position will never exceed the bounds specified by
IAQ.M and ECMN during IAQ control.

Indoor
Air Quality Control -- The indoor air quality
(IAQ) function will admit flesh air into the space whenever
space air quality sensors detect high levels of CO2.
When a space or return air CO2 sensor is connected to the
unit control, the unit's IAQ routine allows a demand-based
control for ventilation air quantity, by providing a modulating
outside air damper position that is proportional to CO2 level.
The ventilation damper position is varied between a minimum
ventilation level (based on internal sources of contaminants
and CO2 levels other than from the effect of people) and the
maximum design ventilation level (determined at maximum
populated status in the building). Demand control ventilation
(DCV) is also available when the (_n_fortLink TM unit is connected to a CCN system using ComfortID TM terminal controls.

If the building is occupied and the indoor fan is running and
the differential between IAQ and OAQ is less than DAQ.L, the
economizer will remain at IAQ.M. The economizer will not
close completely. The damper position will be 0 when the fan
is not running or the building is unoccupied. The damper position may exceed ECMNin
order to provide free cooling.
The (_nfortLink
controller is configured for air quality
sensors which provide 4 mA at 0 ppm and 20 mA at 2000 ppm.
If a sensor has a different range, these bounds must be
reconfigured. These pertinent configurations for ranging the air
quality sensors are IQ.R.L, IQ.R.H, OQ.R.L and OQ.R.H. The
bounds represent the PPM corresponding
to 4 mA (low) and
20 mA (high) for IAQ and OAQ, respectively.

This function also provides alternative control methods for
controlling
the amount of ventilation
air being admitted,
including fixed outdoor air ventilation rates (measured as cfm),
external discrete sensor switch input and externally generated
proportional signal controls.

IfOAQ exceeds the OAQ Lockout Value (OAQ.L), then the
economizer will remain at IAQ.M. This is used to limit the use
of outside air which outdoor air CO2 levels are above the
OAQ.L limit. Normally a linear control of the damper vs. the
IAQ control signal can be used, but the control also supports
non-linear control. Different curves can be used based on the
Diff.AQ Responsiveness
Variable (IAQ.R). See Fig. 13.

The IAQ function requires the installation of the factoryoption economizer system. The DCV sequences also require
the connection of accessory (or field-supplied) space or return
air CO2 sensors. Fixed cfm rate control requires the factoryinstalled outdoor air cfm option. External control of the
ventilation position requires supplemental devices, including a
4 to 20 mA signal, a 10 kilo-otnn potentiometer, or a discrete
switch input, depending on the method selected. Outside air
CO 2 levels may also be monitored
directly and high CO 2
economizer restriction applied when an outdoor air CO2 sensor
is connected. (The outdoor CO2 sensor connection requires
installation of the CEM.)

SETT_G
UP THE SYSTEM -- The IAQ configuration options are under the Local Display Mode Configuration--+IAQ.
See Table 84.

Economizer Min Position ((bnfiguration--+IAQ--+DCV.C
--+EC.MN) -- This is the fully occupied minimum economizer position.
IAQ Demand Vent Min Pos. (Con.figuration--+IAQ--+DCV.C
--+IAQ.M) -- This configuration will be used to set the mini1hum damper position in the occupied period when there is no
IAQ demand.
IAQ Analog
Sensor Config (Configuration-9IAQ--9
AQ.(T-+IQ.A.()
-- This is used to configure the type of
IAQ position control. It has the following options:
• IQ.A. C = 0 (No analog input). If there is no other minimum position control, the economizer minimum position
will be (bnfiguration--+IAQ--gDCV.C--+E(:MN
and
there will be no IAQ control.
• IQ.A. C = 1 (IAQ analog input). An indoor air (space or
return air) CO2 sensor is installed. If an outdoor air CO2
sensor is also installed, or OAQ is broadcast on the CCN,
or if a default OAQ value is used, then the unit can perform IAQ control.
• IQ.A.C = 2 (IAQ analog input with minimum position
override) -- If the differential between IAQ and OAQ
is above Configuration---_IAQ--)AQ.SP-+DAQ.11,
the
economizer minimum position will be the IAQ override
position ((bnfiguration---_IAQ---_AQ.SP---_IQ.O.P).
• IQ.A. C = 3 (4 to 20 mA minimum position) -- With a 4
to 20 mA signal connected to TB5-6 and 7, the economizer minimum position will be scaled linearly from 0%
(4 mA) to EC.MX (20 mA).

The (_n_fortLink control system has the capability of DCV
using an IAQ sensor. The indoor air quality (IAQ) is measured
using a CO2 sensor whose measurements are displayed in parts
per million (ppm). The IAQ sensor can be field-installed in the
return duct. There is also an accessory space IAQ sensor that
can be installed directly in the occupied space. The sensor must
provide a 4 to 20 mA output signal and must include its own
24-v supply. The sensor connects to terminal TB5-6 and 7. Be
sure to leave the 182-ohin resistor in place on terminals 6 and 7.
OPERATION
-- The unit's indoor air quality algorithin modulates the position of the economizer damper between two user
configurations
depending upon the relationship between the
IAQ and the outdoor air quality (OAQ). Both of these values
can be read at the Inputs--+AIR. Q submenu. The lower of these
two configurable positions is referred to as the IAQ Demand
Vent Min Position (IAQ.M), while the higher is referred to as
Economizer Minimum Position (EC.MN). The IAQ.M should
be set to an economizer position that brings in enough fresh air
to remove contaminants and CO2 generated by sources other
than people. The EC.MNvalue
should be set to an economizer
position that brings in enough fresh air to remove contaminants
and CO2 generated by all sources including people. The
EC.MNvalue
is the design value for maxflnum occupancy.
The logic that is used to control the dampers in response to
IAQ conditions is shown in Fig. 12. The (_nfortLink TM controls will begin to open the damper from the IAQ.M position
when the IAQ level begins to exceed the OAQ level by a

67

• IQ.A.C = 4 (10K potentiometer minimum position) -With a 10K linear potentiometer connected to TB5-6 and 7_
the economizer minimum position will be scaled linearly
from 0% (0 kilo-otnns) to ECMX (10 kilo-otnns).
IAQ Analog Fan Config (Configuration---_IAQ---_AQ. _T---_
!Q.A.F) -- This configuration is used to configure the control
of the indoor fan. If this option is used then the IAQ sensor
must be in the space and not in the return duct. It has the following configurations:
• IQ.A.F = 0 (No Fan Start) -- IAQ demand will never
override normal indoor fan operation during occupied or
unoccupied period and turn it on.
• IQ.A.F = 1 (Fan On If Occupied) -- IAQ demand will
override normal indoor fan operation and turn it on (if
off) only during the occupied period (CV operation with
automatic fan).
• IQ.A.F = 2 (Fan On Occupied/Unoccupied) -- IAQ
demand will always override normal indoor fan operation
and turn it on (if off) during both the occupied and unoccupied period. For IQ.A.F = 1 or 2_the fan will be turned on as
described above when DAQ is above the DAQ Fan On Set
Point ((bnfigurafion--+IAQ--+AQ.SP--+D.EON).
The fan
will be turned offwhen DAQ is below the DAQ Fan OffSet
Point ((bnfiguration--_IAQ--+AQ.SP--_D.EOF).
The control can also be set up to respond to a discrete IAQ input.
The discrete input is connected to TB5-6 and 7.
IAQ Discrete Input Config ((bn.figuration--+IAQ--+AQ.(T
--+IQ.L(3 -- This configuration is used to set the type of IAQ
sensor. The following are the options:
• IQ.LC = 0 (No Discrete Input) -- This is used to indicate
that no discrete input will be used and the standard IAQ
sensor input will be used.
• IQ.LC = 1 (IAQ Discrete Input) -- This will indicate
that the IAQ level (high or low) will be indicated by
the discrete input. When the IAQ level is low_ the
economizer minimum position will be Configuration--+
IA Q--+DC V..C --+IAQ.M.
• IQ.LC = 2 (IAQ Discrete Input with Minimum Position
Override) -- This will indicate that the IAQ level (high
or low) will be indicated by the discrete input and the
economizer minimum position will be the IAQ override
position_ IQ. O.P (when high).
It is also necessary to configure how the fan operates when
using the IAQ discrete input.
IAQ Discrete Fan Config ((bn.figuration--+IAQ--+AQ.(T
--+IQ.LF) -- This is used to configure the operation of the
fan during an IAQ demand condition. It has the following
configurations:
• IQ.LF = 0 (No Fan Start) -- IAQ demand will never
override normal indoor fan operation during occupied or
unoccupied period and turn it on.
• IQ.LF = 1 (Fan On If Occupied) -- IAQ demand will
override normal indoor fan operation and turn it on (if
off) only during the occupied period (CV operation with
automatic fan).
• IQ.LF = 2 (Fan On Occupied/Unoccupied)
-- IAQ
demand will always override normal indoor fan
operation and turn it on (if off) during both the occupied
and unoccupied period.
OAQ 4-20 mA Sensor Config (Con.figuration--+IAQ--+
AQ.(T_OQ.A.(3
-- This is used to configure the type of
outdoor sensor that will be used for OAQ levels. It has the following configuration options:
• OQ.A. C = 0 (No Sensor) -- No sensor will be used and
the internal software reference setting will be used.
• OQ.A.C = 1 (OAQ Sensor with DAQ) -- An outdoor
CO 2sensor will be used.
• OQ.A. C = 2 (4 to 20 mA Sensor without DAQ).

ECONOMIZER
MINIMUM
DAMPER
POSITION

MINIMUM
IAQ
DAMPER
POSITION

/

lOO
5oo

700

s

INSIDE/OUTSIDE

10O0

CO 2 DIFFERENTIAL

INSIDE CO 2 CONCENTRATION

/
AQ

AQ

DIFFERENTIAL

DIFFERENTIAL

LOW

HIGH

(DAQ.L)

(DAQ.H)

Fig. 12 -- IAQ Control

...................
Z

...

5
4
;

:

:

P_{

{

,I

I/

!:

ill

0 8_

3

2
1

"6

0

-1
-2
Iii

-3
-4
-5

 IQ.L.O and OAT < OCSP and economizer is
available then purge will be enabled and the economizer will
be colmnanded to 100%.
the

po-

If OAT < IQ.L.O then the economizer will be positioned to
IAQ Purge LO Temp Min Pos ((bnfiguration--+

IAQ--+IAQ.P--+IQ.RL )

•

If neither of the above are true then the dmnpers will be
positioned to the IAQ Purge HI Temp Min PUs ((bnfiguration

•

--+IAQ--+IAQ.P--+IQ.P.H)

69

D.E(:D
= YES -- Economizer
disabled
midification (default).
D.E(:D
= NO -- Economizer
not disabled
midification.

during

dehu-

during

dehu-

Table 84 -- Indoor Air Quality Configuration
ITEM
DCVC
EC.MN
IAQ.M
AQ.CF
IQ.A.C
IQ.A.F
IQ.LC
IQ.LF
OQ.A.C
AQ.SP
IQ.O.P
DAQ.L
DAQ.H
D.F.OF
D.F.ON
IAQ.R
OAQ.L
OAQ.U
AQ.S.R
IQ.R.L
IQ.R.H
OQ.R.L
OQ.R.H
IAQ.P
IQ.PG
IQ.P.T
IQ.P.L
IQ.P.H
IQ.L.O

EXPANSION

]

RANGE

DCV ECONOMIZER SETPOINTS
Economizer Min.Position
IAQ Demand Vent Min.Pos.
AIR QUALITY CONFIGS
IAQ Analog Sensor Config
IAQ 4-20 ma Fan Config
IAQ Discrete Input Config
IAQ Disc.In. Fan Config
OAQ 4-20ma Sensor Config
AIR QUALITY SETPOINTS
IAQ Econo Override Pos.
Dill.Air Quality LoLimit
Diff. Air Quality HiLimit
DAQ PPM Fan Off Setpoint
DAQ PPM Fan On Setpoint
Diff. AQ Responsiveness
OAQ Lockout Value
User Determined OAQ
AIR QUALITY SENSOR RANGE
IAQ Low Reference
IAQ High Reference
OAQ Low Reference
OAQ High Reference
IAQ PRE-OCCUPIED PURGE
IAQ Purge
IAQ Purge Duration
IAQ Purge LoTemp Min Pos
IAQ Purge HiTemp Min Pos
IAQ Purge OAT Lockout

O
0 -- 100
100

ITEM

I

CON POINT

I

DEFAULT

5
Io

I ECONOMIN
IAQMINP

o
o

0-4
0-2
0-2
0-2
0-2

IAQANCFG
IAQANFAN
IAQINCFG
IAQINFAN
OAQANCFG

0-100
0-1000
100-2000
0-2000
0-2000
-5-5
0-2000
0-5000

DAQ LOW
DAQ HIGH
DAQFNOFF
DAQFNON
IAQREACT
IAQOVPOS
OAQLOCK
OAQ USER

1oo
1oo
7oo
2oo
4oo
o
o
4oo

IAQREFL
IAQREFH
OAQREFL
OAQREFH

o
2000
o
2000

%

0-5000
0-5000
0-5000
0-5000
Yes/No
5 - 60
0 - 100
0 - 100
35 - 70

I

EXPANSION
DEHUMIDIFICATION
CONFIG.
Dehumidification Config
Dehumidification Sensor
Econ disable in DH mode?
Vent Reheat Setpt Select
Vent Reheat RAT offset
Vent Reheat Setpoint
Dehumidify Cool Setpoint
Dehumidify RH Setpoint

UNITS

%
%

o
o
o

No

15
10
35
5O

IAQPTIME
I IAQPHTMP
IAQPURGE
IAQPLTMP
IAQPNTLO

rain
iF

Table 85 -- Dehumidification
DEHU
D.SEL
D.SEN
D.EC.D
D.VCF
D.VRA
D.VHT
D.C.SP
D.RH.S

]

RANGE

Configuration
I

UNITS

0-2
1-2
Yea/No
i_ 95
II 10-90

dFdeltaFdF
%

I

CCNPOINT

I

DEFAULT

DHSELECT
DHSENSOR

?

DHVHTCFG
DHECDISA
DHVRAOFF

_es

DHCOOLSP
DHVHT
SP
DHRELHSP

45
_

Vent Reheat Set Point Select (D. V.CF) -- This configuration
determines how the vent reheat set point is selected.
• D.V..(T = 0 -- Reheat follows an offset subtracted from
return air temperature
(D. V.RA).
• D.V..(T = 1 -- Reheat follows a dehumidification
heat
set point (D. V..HT).

NOTE: Configuring
Configuration-+DEHU-+D.SENto
2 will enable the CEM board along with the sensor
control.

Vent Reheat RAT Offset (D. V..RA) -- Set point offset used
only during the vent mode. The air will be reheated to returnair temperature less this offset.

If a tempering, unoccupied or "mechanical cooling locked
out" HVAC mode is present, dehumidification
will be disabled.
An HVAC Off, Vent or Cool mode must be in effect to launch
either a Reheat or Dehumidification
mode.

Cool Set Point (D.C.SP)
cooling set point.

Dehumidity RH Set Point (D.RH.S)
fication relative humidity trip point.

--

This

1 or
for

NOTE: If (bnfiguration--+DEHU--+D.SEL
= 1 or 2, then
staged gas control will be automatically enabled (Configuration-+HEAT-+HT.CF
will be set to 3).

Vent Reheat Set Point (D. V..HT) -- Set point used only during the vent mode. The air will be reheated to this set point.
Dehumidify
midification

selected

If an associated sensor responsible
for dehumidification
fails, dehumidification
will not be attempted (SPRH, RARH).

is the dehu-

Initiating a Reheat or Dehumidification
Mode -- To call out
a Reheat mode in the Vent or the Off HVAC mode, or to call
out a Dehumidification
mode in a Cool HVAC mode, one of
the following conditions must be true:

-- This is the dehumidi-

OPERATION
-- Dehumidification
and reheat can only occur
if the unit is equipped with either staged gas or hydronic heat.
Dehumidification
without reheat can be done on any unit but
Configuration--+DEHU--+D.SEL
must be set to 2.

•
•

If the machine's control type is a TSTAT type (Configuration-+UNIT_C
TYP=-3 or 4) and the discrete input selection
for the sensor is not configured
(D.SEN not equal to 2),
dehumidification
will be disabled.

The space is occupied and the humidity is greater than
the relative humidity trip point (D.RH.S).
The space is occupied and the discrete humidity input is
closed.

Dehumidification
and Reheat Control -- If a dehumidification mode is initiated, the rooftop will attempt to lower
humidity as follows:
•

If the machine's control type is a TSTAT type ((bnfiguration--+UNIT4:TYP=-3
or 4) and the economizer is able to
provide cooling, a dehumidification
mode may be called out,
but the control will not request mechanical cooling.
If a 2-stage control type is selected ((bnfiguration--+UNIT
4: !TP = 4 or 6), then the economizer, if active, locks out
mechanical cooling during the Dehumidification
mode.

•

70

Economizer
Cooling -- The economizer,
if allowed to
perform free cooling, will have its control point (Run
Status-+VIEW--+EC
C P) set to Configuration---_DEHU
--+D.C.SP If Configuration--+DEHU-+D.EC.D
is disabled, the economizer
will always be disabled during
dehmnidification.
Cooling -- For all cooling control types: A High Cool
HVAC mode will be requested internally to the control to

maintain
diagnostics,
although
theenduserwill seea
Dehumidification
modeat thedisplay.In addition,
for
multi-stage
coolingunitsthecoolingcontrolpointwill
besetto Configuration-+DEHU-+D.C.SP
(no SASP
•

•

•

occupied state. Once set, Temperature Compensated mode will
stay on until the unit goes into the Occupied mode. The Start
Bias Time will be written into the CCN Linkage Equipment
Table if the unit is controlled in DAV mode. If the Unoccupied
Economizer Free Cool mode is active (Operating
Modes--€
HVAC = "UNOCC FREE COOL") when temperature compensated start begins, the Unoccupied Free Cool mode will be
stopped.

reset is applied).
Reheat When Cooling Demand is Present -- For reheat
control during dehmnidification:
If reheat follows
an
offset subtracted
from return-air temperature
(Configuration---_DEHU---_D.SEL
= 2), then no heating will be
initiated
and the alarm relay will be energized.
If
Configuration--cDEHU-+D.SEL
= 1 and Configuration--+HEAT--cHT.(T
= staged gas or hot water valve,
then the selected heating control type will operate in the
low heat/modulating
mode.
The heating control point will be whatever the actual
cooling set point would have been (without any supply
air reset applied).
Reheat During Vent Mode -- If configured
(Configuration--+DEHU--+D.V.(T
= 0), the heating control point
will be equal to RAT - D. ERA. If configured (Configuration--+DEHU--+D.V.(T
1), the heating control point
will be equal to the D. V.HT set point.

Ending Dehumidification
and Reheat
ther the humidity sensor fall 5% below
ration-+DEHU-+D.RH.S)
or the
"LOW", the Dehumidification
mode

Carrier

CCN Address (CCNA) -- This configuration
dress the rooftop is assigned.
CCN Bus Number (CCNB)
bus the rooftop is assigned.
CCN Baud Rate (BAUD)
baud rate.

used when the unit is in the unoccupied state. The control will
calculate early Start Bias time based on Space Temperature
deviation from the occupied cooling and heating set points.
This will allow the control to start the unit so that the space is at
conditioned levels when the occupied period starts. This is
required for ASHRAE
90.1 compliance. A space sensor is required for non-linkage applications.

EXPANSION

Factr 3 - 60

rain

TCSTCOOL

TCS.H

Temp,Cmp,Strt,Heat

Factr 3 - 60

rain

TCSTHEAT

start is disabled

> occupied

If (space temperature

< occupied

Start Bias Time = (occupied
temperature)* TLS.H

when these

CCN Broadcast Acknowledger
(B.ACIO -- If this configuration is set to ON, then when any broadcasting is done on the
bus, this device will respond to and acknowledge. Only one device per bus can be configured for this option.
Schedule Number (SC!-LN) -- This configuration
what schedule the control may follow.

set point -

space

When the Start Bias Time is greater than zero the algofitlun
will subtract it from the next occupied thne to calculate the new
start time. When the new start time is reached, the Temperature
Compensated Start mode is set (Operating Modes-+MODE--9
T.CS!),
the fan is started and the unit controlled as in an
71

determines

SCH.N
SCH.N

= 0
= 1

The control is always occupied.
The control follows its internal time schedules. The user may enter any number
between 1 and 64 but it will be overwritten
to "1" by the control as it only has one
internal schedule.

SCH.N

= 65-99

The control is either set up to receive to a
broadcasted
time schedule
set to this
number or the control is set up to broadcast
its internal time schedule (GS.B) to the
network and this is the global schedule
number it is broadcasting. If this is the case,
then the control still follows its internal time
schedules.

cooling set

heating set point)
heating

is the CCN

Global Schedule Broadcast (GS.B) --If this configuration is
set to ON and the schedule number (S(!-L.N) is between 65 and
99, then the control will broadcast the internal time schedule
once every 2 minutes.

cooling set point)
- occupied

This configuration

CCN OAQ Broadcast (OAQ.B) -- If this configuration is set
to ON, the control will periodically broadcast its outside air
quality reading at a rate of once every 30 minutes.

The algoritlun will calculate a Start Bias thne in minutes using the following equations:
Start Bias Time = (space temperature
point)* TLS. C

is the CCN

CCN OARH Broadcast (ORH.B) -- If this configuration is
set to ON, the control will periodically broadcast its outside air
relative humidity at a rate of once every 30 minutes.

TEMPERATURE
COMPENSATED
START LOGIC
-The following conditions must be met:
• Unit is in unoccupied
state.
• Next occupied time is valid.
• Current time of day is valid.
• Valid space temperature
reading is available (sensor or
DAV-Linkage).

If (space temperature

-- This configuration

CCN OAT Broadcast (OAT.B) -- If this configuration is set
to ON, the control will periodically broadcast its outside-air
temperature at a rate of once every 30 minutes.

RANGE UNITS CCN POINT

compensated

--

is the CCN ad-

NOTE: Only the time and date broadcaster
can perform
daylight savings time adjustments. Even if the rooftop is stand
alone, the user may want to set this to ON to accomplish the
daylight/savings
function.

TCST-Cool Factor (TCS. (3 -- This is the factor for the start
time bias equation for cooling.
TCST-Heat Factor (TCS./-!) -- This is the factor for the start
time bias equation for heating.
NOTE: Temperature
factors are set to 0.

It

OCCUE

SETTING UP THE SYSTEM -- The settings for temperature compensated start can be found in the local display under
(bnfiguration
--¢UNIT.

Temp,Cmp,Strt,Cool

--

CCN Time/Date Broadcast (TM.DT) -- If this configuration
is set to ON, the control will periodically send the time and date
out onto the CCN bus once a minute. If this device is on a CCN
network then it will be important to make sure that only one
device on the bus has this configuration set to ON. If more than
one thne broadcaster is present, problems with the time will

Temperature Compensated Start -- This logic is

ITEM

Network _ (CCN) System

The major configurations for CCN progralmning are located in the local displays at (bnfiguration
_CCN
See Table 86.

Control -- When eithe set point ((bnfigudiscrete
input reads
will end.

TCS.C

Comfort

is possible to configure the (_l_fortLink TM control to participate as an element of the Carrier Comfort Network (CCN) system directly from the local display. This section will deal with
explaining the various progralmnable
options which are found
under the CCN sub-menu in the Configuration
mode.

Table 86 -- CCN Configuration
ITEM

I

EXPANSION

CCN
CCNA
CCNB
BAUD
BROD
TM.DT
OAT.B
ORH.B
OAQ.B
G.S.B
B.ACK
SC.OV
SCH.N
HOL. T
O.T.L.
OVEX
SPT.O
T58.0
GL.OV

CCN CONFIGURATION
CCN Address
CCN Bus Number
CCN Baud Rate
CCN BROADCST DEFINITIONS
CCN Time/Date Broadcast
CCN OAT Broadcast
CCN OARH Broadcast
CCN OAQ Broadcast
Global Schedule Broadcst
CCN Broadcast Ack'er
CCN SCHEDULES-OVERRIDES
Schedule Number
Accept Global Holidays?
Override Time Limit
Timed Override Hours
SPT Override Enabled ?
T58 Override Enabled ?
Global Sched. Override ?

RANGEI UNITSI

0
3
On

0 - 99

SCHEDNUM
HOLIDAYT
OTL
OVR_EXT
SPT OVER
T58_OVER
GLBLOVER

1
No
1
0
Yes
Yes
No

I YES/NO
0-4
0-4
YES/NO
YES/NO
YES/NO

HRS
HRS

Off
Off
Off
Off
Off

temperature (EDT) Low Alert Limit (SA.L.O), then Alert 302
will be generated and cooling operation will be stopped but
heating operation will continue. The alert will automatically
reset.
EDT High Alert Limit/Occ (SA.H.O) -- If the space temperature is above the configurable occupied EDT High Alert Limit
(SA.H.O), then Alert 303 will be generated and heating operation will be stopped but cooling operation will continue. The
alert will automatically reset.
EDT Low Alert Limit/Unocc
(SA.L. U) -- If the space temperature is below the configurable unoccupied EDT Low Alert
Lrinit (SA.L. U), then Alert 302 will be generated and cooling
operation will be stopped but heating operation will continue.
The alert will automatically reset.

StYF Override Enabled? (SPT.O)
-- If a space sensor is
present, then it is possible to override an unoccupied period by
pushing the override button on the T55 or T56 sensor. This
option allows the user to disable this function by setting this
configuration to NO.

EDT High Alert Limit/Unocc
(SA.H. U) -- If the space temperature is above the configurable unoccupied EDT High Alert
Limit (SA.H. U), then Alert 303 will be generated and heating
operation will be stopped but cooling operation will continue.
The alert will automatically reset.

T58 Override Enabled? (158.0) -- The T58 sensor is a CCN
device that allows cooling/heating
set points to be adjusted,
space temperature to be written to the rooftop unit, and the ability to initiate a timed override. This option allows the user to
disable the override initiated from the T58 sensor by setting
this option to NO.

RAT Low Alert Limit/Occ (RA.L.O) -- If the return-air temperature is below the configurable occupied RAT Low Alert
Lrinit (RA.L.O), then Alert 304 will be generated and internal
routines will be modified. Unit operation will continue but
VAV heating operation will be disabled. The alert will automatically reset.

Global Schedule Override? (GL.OV) -- If the control is set
to receive global schedules then it is also possible for the global
schedule broadcaster to call out an override condition as well.
This configuration allows the user to disable the global schedule broadcaster from overriding the control.
E The ALLM submenu
the alert limit set points. A list is shown

DEFAULT

CCNBC
OATBC
OARHBC
OAQBC
GSBC
CCNBCACK

Timed Override Hours (OV..EX) -- This displays the current
number of hours left in an override. It is possible to cancel an
override in progress by writing "0" to this variable, thereby
removing the override trine left.

Configuration

I

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

Override Time Limit (O. T.L) -- This configuration
allows
the user to decide how long an override occurs when it is initiated. The override may be configured from 1 to 4 hours. If the
time is set to 0, the override function will become disabled.

used to configure
Table 87.

CCNBUS
I CCNBAUDD
CCNADD

- 239
- 239
-5

Accept Global Holidays? (HOL. T) -- If a device is broadcasting the time on the bus, it is possible to accept the time yet
not accept the global holiday from the broadcast message.

Alert Limit

POINT

RAT High Alert Limit/Occ (RA.H.O)
-- If the return-air
temperature is above the configurable occupied RAT High
Alert Limit (RA.H.O), then Alert 305 will be generated and
operation will continue. The alert will automatically reset.

is
in

RAT Low Alert Limit/Unocc
(RA.L. U) -- If the return-air
temperature is below the configurable unoccupied RAT Low
Alert Lrinit (RA.L. U), then Alert 304 will be generated. Unit
operation will continue but VAV heating operation will be disabled. The alert will automatically reset.

StYF Low Alert Limit/Occ (SRL.O) -- If the space temperature is below the configurable occupied StYF Low Alert Limit
(SRL.O), then Alert 300 will be generated and the unit will be
stopped. The alert will automatically reset.

RAT High Alert Limit/Unocc
(RA.H. U) -- If the return-air
temperature is above the configurable unoccupied RAT High
Alert Limit (RA.H. 12), then Alert 305 will be generated. Operation will continue. The alert will automatically reset.

StYF High Alert Limit/Occ (SRH.O) -- If the space temperature is above the configurable occupied StYF High Alert Limit
(SRH.O), then Alert 301 will be generated and the unit will be
stopped. The alert will automatically reset.

RARH Low Alert Limit (R.RH.L)
-- If the unit is configured to use a return air relative humidity sensor ((bnfiguration--+UNIT--+SENS--+RRI-I..S),
and the measured level is
below the configurable RH Low Alert Lrinit (R.RH.L), then
Alert 308 will occur. The unit will continue to run and the alert
will automatically reset.

StYF Low Alert Limit/Unocc
(SRL. U) -- If the space temperature is below the configurable unoccupied SPT Low Alert
Lrinit (SRL. U), then Alert 300 will be generated and the unit
will be stopped. The alert will automatically reset.
StYF High Alert Limit/Unocc
(SRH. U) -- If the space temperature is above the configurable unoccupied StYF High Alert
Lrinit (SRH. U), then Alert 301 will be generated and the unit
will be stopped. The alert will automatically reset.

RARH High Alert Limit (R.RH.H)
-- If the unit is configured to use a return air relative humidity sensor ((bnfiguration--+UNIT--+SENS--+RRHS),
and the measured level is
above the configurable RARH High Alert Limit (R.R!-LH),

EDT Low Alert Limit/Occ (SA.L.O) --If the space temperature is below the configurable occupied evaporator discharge

72

thenAlert309will occur.
Theunitwillcontinue
torunandthe
alertwillautomatically
reset.

Air Temperature Leaving Supply Fan Sensor (SAT.T) -- This
variable is used to adjust the supply fan temperature sensor
reading. The sensor reading can be adjusted 4- 10 o F to match
the actual measured temperature.

Supply Duct Pressure Low Alert Limit (SRL) -- If the unit
is a VAV unit with a supply duct pressure sensor and the measured supply duct static pressure is below the configurable SP
Low Alert Limit (DRL), then Alert 310 will occur. The unit
will continue to run and the alert will automatically reset.

Return Air Temperature
Sensor Trim (RAT.T) -- This variable is used to adjust the return air temperature sensor reading.
The sensor reading can be adjusted 4- 10 o F to match the actual
measured temperature.

Supply Duct Pressure High Alert Limit (SRH) -- If the unit
is a VAV unit with a supply duct pressure sensor and the measured supply duct static pressure is above the configurable SP
High Alert Limit (SRH), then Alert 311 will occur. The unit
will continue to run and the alert will automatically reset.

Outdoor Air Temperature Sensor Trim (OAT. T) --This
variable is used to adjust the outdoor air temperature sensor reading. The sensor reading can be adjusted 4- 10 o F to match the
actual measured temperature.

Building Pressure Low Alert Limit (BRL) -- If the unit is
configured to use modulating power exhaust then a building
static pressure limit can be configured using the BP Low Alert
Limit (BRL). If the measured pressure is below the limit then
Alert 312 will occur.

Space Temperature Sensor Trim (SPT.T) -- This variable is
used to adjust the space temperature sensor reading. The sensor
reading can be adjusted 4- 10 o F to match the actual measured
temperature.
Circuit A Saturated Condenser Temperature Trim (CTA. T) -This variable is used to adjust the saturated condenser temperature sensor reading for circuit A. The sensor reading can be
adjusted 4- 30 ° F to match the actual measured temperature.
Used on 48/50AJ,AK,AW, AY units only.

Building Pressure High Alert Limit (BRIg) -- If the unit is
configured to use modulating power exhaust then a building
static pressure limit can be configured using the BP Hi Alert
Lilnit (BRIg). If the measured pressure is above the lilnit, then
Alert 313 will occur.

Circuit B Saturated Condenser Temperature Trim (CTB. T) -This variable is used to adjust the saturated condenser temperature sensor reading for circuit B. The sensor reading can be
adjusted 4- 30 ° F to match the actual measured temperature.
Used on 48/50AJ,AK,AW, AY units only.

Indoor Air Quality High Alert Limit (//1(2.[1) -- If the unit
is configured to use a CO2 sensor and the level is above the
configurable IAQ High Alert Lilnit (IAQ.H) then the alert will
occur. The unit will continue to run and the alert will automatically reset.

Suction Pressure Circuit A Trim (SRA. T) -- This variable is
used to adjust the suction pressure sensor reading for circuit A.
The sensor reading can be adjusted 4- 50 psig to match the actual measured pressure.

Sensor Trim Configuration E The TRIM submenu
is used to calibrate
are used when the
sensor output. The
measured reading
Table 88.

the sensor triln settings. The triln settings
actual measured reading does not match the
sensor can be adjusted to match the actual
with the trim function. A list is shown in

Suction Pressure Circuit B Trim (SRB. T) -- This variable is
used to adjust the suction pressure sensor reading for circuit B.
The sensor reading can be adjusted 4- 50 psig to match the actual measured pressure.

IMPORTANT:
Sensor trim must not be used to extend
unit operation
past the allowable
operating
range.
Doing so may void the warranty.

Table 87 -- Alert Limit Configuration
ITEM
SP.L.O
SP.H.O
SP.L.U
SP.H.U
SA.L.O
SA.H.O
SA.L.U
SA.H.U
RA.L.O
RA.H.O
RA.L.U
RA.H.U
R.RH.L
R.RH.H
SP.L
SP.H
BP.L
BP.H
IAQ.H

EXPANSION
SPT Io alert limit/occ
SPT hi alert limit/occ
SPT Io alert limit/unocc
SPT hi alert limit/unocc
EDT Io alert limit/occ
EDT hi alert limit/occ
EDT Io alert limit/unocc
EDT hi alert limit/unocc
RAT Io alert limit/occ
RAT hi alert limit/occ
RAT Io alert limit/unocc
RAT hi alert limit/unocc
RARH low alert limit
RARH high alert limit
SP low alert limit
SP high alert limit
BP Io alert limit
BP high alert limit
IAQ high alert limit

RANGE
-10-245
-10-245
-10-245
-10-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
0-1 O0
0-1 O0
0-5
0-5
-0.25-0.25
-0.25-0.25
0-5000

UNITS
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
%
%
"H20
"H20
"H20
"H20

POINT
SPLO
SPHO
SPLU
SPHU
SALO
SAHO
SALU
SAHU
RALO
RAHO
RALU
RAHU
RRHL
RRHH
SPL
SPH
BPL
BPH
IAQH

DEFAULT
60
85
45
1O0
40
1O0
40
1O0
60
90
40
1O0
0
1O0
0
2
-0.25
0.25
1200

Table 88 -- Sensor Trim Configuration
ITEM
SAT.T
RAT.T
OAT.T
SPT. T
CTA. T
CTB.T
SP.A. T
SP.B.T
DP.A. T
DP.B.T

EXPANSION
Air Temp Lvg SF Trim
RAT Trim
OAT Trim
SPT Trim
Cir A Sat. Cond. Temp Trim
Cir B Sat. Cond. Temp Trim
Suct.Press.Circ.A Trim
Suct.Press.Circ.B Trim
Dis.Press.Circ.A Trim
Dis.Press.Circ.B Trim

RANGE
-10
-10
-10
-10
-30
-30
-50
-50
-50
-50

73

-

10
10
10
10
30
30
50
50
50
50

UNITS
^F
^F
^F
^F
^F
^F
PSIG
PSlG
PSlG
PSlG

POINT
SAT_TRIM
RAT_TRIM
OAT_TRIM
SPT TRIM
SCT_, TRIM
SCTB TRIM
SPA -I=RIM
SPB TRIM
DPA TRIM
DPB_TRIM

DEFAULT
0
0
0
0
0
0
0
0
0
0

Discharge Pressure Circuit A Trim (DRA. T) -- This variable is used to adjust the discharge pressure sensor reading for
circuit A. The sensor reading can be adjusted + 50 psig to
match
the
actual
measured
pressure.
Used
on
48/
50A2,A3,A4,A5
units only.

IAQ Discrete Input -- Low (IAQ.L) -- The IAQ discrete input is set for normally open when low. If a field-supplied IAQ
discrete input is used that is normally closed, change this variable to closed.
Fire Shutdown -- Off (FSD.L) -- The fire shutdown input is
set for normally open when off. If a field-supplied fire shutdown input is used that is normally closed, change this variable
to closed.

Discharge Pressure Circuit B Trim (DRB. T) -- This variable is used to adjust the discharge pressure sensor reading for
circuit B. The sensor reading can be adjusted + 50 psig to
match
the
actual
measured
pressure.
Used
on
48/
50A2,A3,A4,A5
units only.

Pressurization
Switch -- Off (PRS.L) -- The pressurization
input is set for normally open when off. Ifa field-supplied pressurization input is used that is normally closed, change this
variable to closed.

4 to 20 mA Inputs -- There are a number of 4 to 20 mA inputs which may be calibrated. These inputs are located in
Inputs_4-20.
They are:
•
•
•
•
•

SRM.
BRM.
OA.M.
RA.M.
SA.M.

Evacuation Switch -- Off (EV(:L) -- The evacuation input is
set for normally open when off. If a field-supplied evacuation input is used that is normally closed, change this variable to closed.

T-- static pressure milliamp trim
T-- building pressure milliamp trim
T-- outside air cfm milliamp trim
T-- return air cfm milliamp trim
T-- supply air cfm milliamp trim

Discrete Switch Logic Configuration

Smoke Purge -- Off (PRGL) -- The smoke purge input is set
for normally open when off. If a field-supplied smoke purge input is used that is normally closed, change this variable to closed.

E The SW..LG

Display Configuration

submenu is used to configure the normally open!normally closed
settings of switches and inputs. This is used when field-supplied
switches or input devices are used instead of Carrier devices. The
normally open or normally closed setting may be different on a
field-supplied device. These points are used to match the control
logic to the field-supplied device.

to configure
Table 90.

Test Display LEDs (TEST) -- This is used to test the operation of the (_n_fortLink TM display.
Metric Display (METR) -- This variable is used to change
the display from English units to Metric units.

The defaults for this switch logic section will not normally
need changing. However, if a field-installed switch is used that
is different from the Carrier switch, these settings may need
adjustment.

Language Selection (LANG) -- This variable is used to
change the language of the (_nfortLink
display. At this tflne,
only English is available.
Password Enable (PAS.E) -- This variable enables or disables the use of a password. The password is used to restrict
use of the control to change configurations.

I

I

trol can be configured to operate as normally open or
IMPORTANT:
normally
closed. Many of the switch inputs to the con-

-- The DISP submenu is used
the local display settings. A list is shown in

I
I

Service Password (PASS) -- This variable
meric password that is required if enabled.

Settings for switch logic are found at the local displays
under the Configuration-+SW..LG
submenu. See Table 89.

is the 4-digit nu-

Remote Control Switch Input

-- The remote switch
input is located on the ECB-1 board and connected to TB6 terminals 1 and 3. The switch can be used for several remote control functions. See Table 91.

Filter Status Input -- Clean (FTS.L) -- The filter stares input for clean filters is set for normally open. If a field-supplied
filter stares switch is used that is normally closed for a clean
filter, change this variable to closed.

Remote Input State (Inputs--gGEN.I--gREMT)
the actual real thne state of the remote input.

IGC FeedbackOff (IG(:L)
-- The input for IGC feedback is set for normally open for off. If a field-supplied IGC
feedback switch is used that is normally closed for feedback
off, change this variable to closed.
Remote Switch -- Off (RMI.L) -- The remote switch is set
for normally open when off. If a field-supplied control switch
is used that is normally closed for an off signal, change this
variable to closed.

--

This

is

Remote Switch Confi g (Con.figuration
--+UNIT--+ RM. CF)
-- This is the configuration that allows the user to assign different types of functionality to the remote discrete input.
• 0 -- NO REMOTE SW -- The remote switch will not be
used.
• 1 -- OCC-UNOCC
SW -- The remote switch input will
control the occupancy
state. When the remote switch
input is ON, the unit will forced into the occupied mode.
When the remote switch is OFF, the unit will be forced
into the unoccupied
mode.
• 2 -- STRT/STOP -- The remote switch input will start
and stop the unit. When the unit is colmnanded
to stop,
any timeguards in place on compressors
will be honored
first. When the remote switch is ON, the unit will be
commanded to stop. When the remote switch is OFF the
unit will be enabled to operate.
• 3 -- OVERRIDE
SW -- The remote switch can be used
to override any internal or external time schedule being
used by the control and force the unit into an occupied
mode when the remote input state is ON. When the
remote switch is ON, the unit will be forced into an occupied state. When the remote switch is OFF, the unit will
use its internal or external time schedules.

Economizer
Switch -- No (ECS.L)
-The economizer
switch is set for normally open when low. If a field-supplied
economizer switch is used that is normally closed when low,
change this variable to closed.
Fan Status Switch -- Off (SFS.L) -- The fan status switch
input is set for normally open for off. If a field-supplied
fan
status switch is used that is normally closed, change this
variable to closed.
Demand Limit Switch 1 -- Off (DL1.L)
-The demand
limit switch no. 1 input is set for normally open for off. If a
field-supplied
demand limit switch is used that is normally
closed, change this variable to closed.
Demand Limit Switch 2/Dehumidify
-- Off (DL2.L)
-The demand limit switch no. 2 input is set for normally open
for off. If a field-supplied demand lhnit switch is used that is
normally closed, change this variable to closed.

74

Table 89 -- Switch Logic Configuration
ITEM
SW.LG
FTS.L
IGC.L
RMI.L
ECS.L
SFS.L
DL1.L
DL2.L
IAQ.L
FSD.L
PRS. L
EVC.L
PRG.L

EXPANSION

[

SWITCH LOGIC: NO / NC
Filter Status Inpt-Clean
IGC Feedback - Off
RemSw Off-Unoc-Strt-NoOv
Economizer Switch - No
Fan Status Sw, - Off
Dmd,Lmt,Sw,1 - Off
Dmd,Lmt,2 Dehumid - Off
IAQ Disc, Input - Low
Fire Shutdown - Off
Pressurization Sw, - Off
Evacuation Sw, - Off
Smoke Purge Sw, - Off

ITEM

EXPANSION
Test Display LEDs
Metric Display
Language Selection
Password Enable
Service Password

90 -- Display

EXPANSION

RANGE

REMT

Remote Input State

ON/OFF

RMTIN

RM.CF

Remote Switch Config

0 -3

RMTINCFG

RMI.L

RemSw
Off-Unoc-Strt-NoOv

Open/Close

RMTINLOG

[

DEFAU_
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open

Configuration
UNITS

Space Temperature
--¢SENS--cSRO.S)
of the offset slider.

CCN
POINT

CCNPOINT
FLTSLOGC
GASFANLG
RMTINLOG
ECOSWLOG
SFSLOGIC
DMD SWl L
DMD SW2L
IAQINLOG
FSDLOGIC
PRESLOGC
EVACLOGC
PURGLOGC

RANGE
ON/OFF
ON/OFF
O-l(multi-text strings)
ENABLE/DISABLE
0000-9999

Table 91 -- Remote Switch Configuration
ITEM

1

Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close

Table

TEST
METR
LANG
PAS.E
PASS

RANGE

POINT
TEST
DISPUNIT
LANGUAGE
PASS EBL
PASS_/ORD

DEFAULT
Off
Off
0
Enable
1111

Offset Sensor ((bnfiguration--cUNIT
-- This configuration disables the reading

Space
Temperature
Offset
Range
((bnfiguration--+UNIT--+SENS--+SRO.R).
-- This configuration establishes
the range, in degrees E that the T56 slider can affect SPTO
when adjusting the slider from the far left (-SRO.R) to the far
right (+SRO.R). The default is 5 ° E

Remote
Switch
Logic
Configuration
((bqfiguration--€
SW..LG--cRMI.L)
-- The control allows for the configuration
of a normally open!closed status of the remote input switch via
RMLL. If this variable is configured OPEN, then when the
switch is open, the remote input switch perceives the logic state
as OFF. Correspondingly,
ifRMLL is set to CLOSED, the remote input switch will perceive a closed switch as meaning
OFF. See Table 92.

Space Temperature
Offset Value (Temperatures-+AIR.T
--+SPTO) -- The Space Temperature Offset Value is the reading of the slider potentiometer
in the T56 that is resolved to
delta degrees based on SRO.R.

TIME CLOCK

CONFIGURATION

This section describes each Time Clock menu item. Not
every point will need to be configured for every unit. Refer to
the Controls Quick Start section for more information on what
set points need to be configured for different applications. The
Time Clock menu items are discussed in the same order that
they are displayed in the Time Clock table. The Time Clock
table is shown in Table 93.

Hot Gas Bypass E Hot gas bypass is an active part of
the A-Series (_nfortLink TM capacity staging and minimum
evaporator load protection functions. It is controlled though the
Minhnum Load Valve function.
The hot gas bypass option consists of a solenoid valve with
a fixed orifice sized to provide a nominal 3-ton evaporator load
bypass. A hot gas refrigerant line routes the bypassed hot gas
from Circuit A's discharge line to Circuit A's evaporator
distributor. When the unit control calls for hot gas bypass, the
hot gas enters the evaporator coil and adds refrigeration
load
to the compressor circuit to reduce the cooling effect from
Circuit A.

Hour and Minute (HH.MM)_

The hour and minute

of the time clock are displayed in 24-hour, military time. Time
can be adjusted manually by the user.
When connected to the CCN, the unit can be configured to
transmit time over the network or receive time from a network
device. All devices on the CCN should use the same time. Only
one device on the CCN should broadcast time or problems will

The hot gas bypass system is a factory-installed
option
installed on Circuit A only. This function is enabled at Configurafion_COOL---_MLV.
When this function is enabled, an
additional stage of cooling capacity is provided by the unit
control staging sequences (see Tables 52, 54, 58, and 60).

occur.

Month of Year (MNTH) _ This variable is the current
month of the calendar year.

Day of Month (DOll4)_
day (1 to 31) of the month.

Space Temperature Offset E Space temperature offset corresponds to a slider on a T56 sensor that allows the occupant to adjust the space temperature by a configured range
during an occupied period. This sensor is only applicable to
units that are configured as either 2-Stage SPT or Multi-Stage
SPT control ((bnfigurafion
-+UNIT-€C
TYP = 5 or 6).

This variable is the current

Day of Week (DAY) _

This variable is the current
of the week (Monday = 1 through Sunday = 7).

Year (YEAR)

_

This variable

day

is the current year (for ex-

ample, 2005).
ITEM

EXPANSION

RANGE

UNITS

CCN
POINT

SP.O.S

Space Temp
Offset Sensor

Enable/
Disable

SPTOSENS

SP.O.R

Space Temp
Offset Range

1 - 10

SPTO_RNG

SPTO

Space Temperature
Offset

+- SRO.R ^F

SPTO

Local Time

Schedule

(SCH.L)

_ This submenu is

used to program the time schedules. There are 8 periods
(PER.1 through PER.8). Each time period can be used to set
up a local schedule for the unit.

75

Table 92 -- Remote Switch
REMOTE
SWITCH LOGIC
CONFIGURATION
(RMI.L)
OPEN
CLOSED

SWITCH
STATUS

REMOTE INPUT STATE
(REMT)

Logic Configuration
REMOTE SWITCH CONFIGURATION
1

No Remote Switch

Occ-Unocc

Switch

(RM.CF)
2

Start/Stop
Start

3
Override

OPEN

OFF

XXXXX

Unoccupied

CLOSED

ON

XXXXX

Occupied

Stop

Override

OPEN

ON

XXXXX

Occupied

CLOSED

OFF

XXXXX

Unoccupied

Stop
Start

No Override

Monday In Period (PER.X---_I)AYS---_MON)
-- This variable is used to include or remove Monday from the schedule.
Each period is assigned an occupied on and off tflne. If this
variable is set to YES, then Monday will be included in that period's occupied tflne schedule. If this variable is set to NO, then
the period's occupied time schedule will not be used on Monday.
This variable can be set for Periods 1 through 8.

No Override
Override

Occupied From (PER.X_OCC)
-- This variable is used to
configure the start time of the Occupied period. All days in the
same period set to YES will enter into Occupied mode at this
time.

Occupied To (PER.X-->UNC) -- This variable is used to configure the end time of the Occupied period. All days in the
same period set to YES will exit Occupied mode at this time.

Tuesday In Period (PER.X---_DAYS--_TUE)
-- This variable
is used to include or remove Tuesday from the schedule. Each
period is assigned an occupied on and off time. If this variable
is set to YES, then Tuesday will be included in that period's occupied time schedule. If this variable is set to NO, then the period's occupied time schedule will not be used on Tuesday. This
variable can be set for Periods 1 through 8.

Local Holiday Schedules (HOL.L) E This submenu
is used to program the local holiday schedules. Up to 30 holidays can be configured. When a holiday occurs, the unit will
follow the occupied schedules that have the HOLIDAY 1N
PERIOD point set to YES.
Holiday Start Month (HD.O1 to HD.30--cMON)
-- This is
the start month for the holiday. The numbers 1 to 12 correspond to the months of the year (e.g., January = 1).
Holiday Start Day (HD.O1 to HD.30-cDAY)
--This
is the
start day of the month for the holiday. The day can be set from
1 to31.

Wednesday
In Period (PER.X---_I)AYS--_WED)
-This
variable is used to include or remove Wednesday from the
schedule. Each period is assigned an occupied on and offtflne.
If this variable is set to YES, then Wednesday will be included
in that period's occupied time schedule. If this variable is set to
NO, then the period's occupied time schedule will not be used
on Wednesday. This variable can be set for Periods 1 through 8.

Holiday Duration (HD.O1 to HD.30-+LEN)
length in days of the holiday. The holiday
days.

Thursday In Period (PER.X--_DAYS--_THU)
-- This variable is used to include or remove Thursday from the schedule.
Each period is assigned an occupied on and off time. If this
variable is set to YES, then Thursday will be included in that
period's occupied time schedule. If this variable is set to NO,
then the period's occupied thne schedule will not be used on
Thursday. This variable can be set for Periods 1 through 8.

-- This is the
can last up to 99

Daylight Savings Time (DAY.S) _ The daylight savings time function is used in applications where daylight
savings time occurs. The function will automatically
correct
the clock on the days configured for daylight savings time.
DAYLIGHT
SAVINGS START (DS.ST) -- This submenu
configures the start date and time for daylight savings.

Friday In Period (PER.X-cDAYS-cFRI)
-- This variable is
used to include or remove Friday from the schedule. Each period is assigned an occupied on and offtime. If this variable is set
to YES, then Friday will be included in that period's occupied
time schedule. If this variable is set to NO, then the period's occupied time schedule will not be used on Friday. This variable
can be set for Periods 1 through 8.

Daylight Savings Start Month (DS.ST---)ST.MN)
-- This is
the start month for daylight savings time. The numbers 1 to 12
correspond to the months of the year (e.g., January = 1).
Daylight Savings Start Week (DS.ST---)ST. WK) -- This is
the start week of the month for daylight savings. The week can
be set from 1 to 5.

Saturday In Period (PER.X-cDAYS-cSA13
-- This variable is used to include or remove Saturday from the schedule.
Each period is assigned an occupied on and off time. If this
variable is set to YES, then Saturday will be included in that
period's occupied time schedule. If this variable is set to NO,
then the period's occupied thne schedule will not be used on
Saturday. This variable can be set for Periods 1 through 8.

Daylight Savings Start Day (DS.ST--)ST.DY)
-- This is the
start day of the week for daylight savings. The day can be set
from 1 to 7 (Sunday=l, Monday=2, etc.).
Daylight Savings Minutes To Add (DS.ST-cMIN.A)
-- This
is the amount of time that will be added to the time clock for
daylight savings.
DAYLIGHT SAVINGS STOP (DS.SP) -- This submenu
figures the end date and time for daylight savings.

Sunday In Period (PER.X-cDAYS-cSUN)
-- This variable
is used to include or remove Sunday from the schedule. Each
period is assigned an occupied on and off time. If this variable
is set to YES, then Sunday will be included in that period's occupied time schedule. If this variable is set to NO, then the period's occupied thne schedule will not be used on Sunday. This
variable can be set for Periods 1 through 8.

con-

Daylight Savings Stop Month (DS.SP-cSRMN)
-- This is
the stop month for daylight savings time. The numbers 1 to 12
correspond to the months of the year (e.g., January = 1).
Daylight Savings Stop Week (DS.SP-cSR
Wit3 -- This is
the stop week of the month for daylight savings. The week can
be set from 1 to 5.

Holiday In Period (PER.X-cDAYS-cHOL)
-- This variable
is used to include or remove a Holiday from the schedule. Each
period is assigned an occupied on and offtime. If this variable is
set to YES, then holidays will be included in that period's occupied time schedule. If this variable is set to NO, then the period's
occupied time schedule will not be used on holidays. This variable can be set for Periods 1 through 8.

Daylight Savings Stop Day (DS.SP-cSRDY)
-- This is the
stop day of the week for daylight savings. The day can be set
from 1 to 7 (Sunday=l, Monday=2, etc.).
Daylight Savings Minutes To Subtract (DS.SP-cMIN.S)
-This is the amount of time that will be removed from the time
clock after daylight savings ends.

76

Table 93 -- Time Clock Configuration
ITEM
TIME
HH.MM
DATE
MNTH
DOM
DAY
YEAR
SCH.L
PER. 1
PER. 1-_DA YS
PER. 1-_DA YS-_MON
PER.1 -_DA YS-_ TUE
PER. 1-_DAYS-_WED
PER.1 -_DA YS-_ THU
PER. 1-_DA YS-_FRI
PER. 1-_DA YS-_SA T
PER. 1-_DA YS-_SUN
PER. 1-_DA YS-_HOL
PER. 1-_OCC
PER. 1-_UNC
Repeat for periods 2-8
HOL.L
HD.01
HD.OI-_MON
HD.01 -_DAY
HD.OI-_LEN
Repeat for holidays 2-30
DAES
DS.ST
DS.ST-_ST.MN
DS.ST-_ST. WK
DS.ST-_SEDY
DS.ST-_MIN.A
DS.SP
DS.SP-_SP.MN
DS.SP-_SP. WK
DS.SP-_SP.DY
DS.SP-_MIN.S

EXPANSION

RANGE

TIME OF DAY
Hour and Minute
MONTH,DATE,DAY AND YEAR
Month of Year
Day of Month
Day of Week
Year
LOCAL TIME SCHEDULE
PERIOD 1
DAY FLAGS FOR PERIOD 1
Monday in Period
Tuesday in Period
Wednesday in Period
Thursday in Period
Friday in Period
Saturday in Period
Sunday in Period
Holiday in Period
Occupied from
Occupied to
LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 01
Holiday Start Month
Start Day
Duration (Days)
DAYLIGHT SAVINGS TIME
DAYLIGHT SAVINGS START
Month
Week
Day
Minutes to Add
DAYLIGHTS SAVINGS STOP
Month
Week
Day
Minutes to Subtract

TROUBLESHOOTING

MOY
DOM
DOWDISP
YOCDISP

YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
00:00
00:00

PER1MON
PER1TUE
PERlWED
PER1THU
PER1FRI
PER1SAT
PER1SUN
PER1HOL
PER10CC
PER1 UNC

0-12
0-31
0 -99

HOL_MON1
HOL_DAY1
HOL_LEN1

1 -12
1-5
1-7
0 - 90

STARTM
STARTW
STARTD
MINADD

4
1
7
6O

1 -12
1-5
1-7
0 - 90

STOPM
STO PW
STOPD
MINSUB

10
5
7
6O

Period 1 only
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
00:00
24:00

-- The electronic con-

The EDT, OAT, RAT, LAT, T55, T56, and T58 space temperature sensors use 10K thermistors. Resistances at various
temperatures are listed in Tables 99 and 100.
THERMISTOR/TEMPERATURE
SENSOR CHECK -- A
high quality digital volt-ohiraneter
is required to perform this
check.

Cooling and heating loads are satisfied.
Progralraned schedule.
General power failure.
Tripped control circuit transformers circuit breakers.
Tripped compressor circuit breakers.
Unit is turned offthrough the CCN network.

1. Connect the digital voltmeter across the appropriate thermistor terminals at the J8 terminal strip on the main base
board.

Single Circuit Stoppage

-- If a single circuit stops
incorrectly, there are several possible causes. The problem
should be investigated using information from the Alarms and
Alerts section on page 93.
analysis

multi-text strings
0-31
multi-text strings
e,g, 2003

When replacing thermistors SCT.A and SCT.B, reuse the
original hardware. These thermistors must be clamped tightly
to the hairpins of the condenser.

Unit Stoppage -- There are several conditions that can cause the unit not to provide heating or cooling.
If an alarm is active which causes the unit to shut down,
diagnose the problem using the information
provided
in
the Alarms and Alerts section on page 93, but also check for
the following:

Detailed service
found in Tables 94-96 and in Fig. 14.

TIME

the saturated condensing
temperature
on 48/50AJ,AK,AW, AY units (SCT.A
and
SCT.B). See Tables 97 and 98 for temperature vs. resistance
data.

Complete

Service Analysis-

DEFAULT

00:00

Thermistor Troubleshooting
trol uses five 5K-thermistors for

The scrolling marquee display shows the actual operating
conditions of the unit while it is running. If there are alarms or
there have been alarms, they will be displayed in either the current alarm list or the history alarm list. The Service Test mode
allows proper operation of the compressors, fans, and other
components to be checked while the unit is not operating.

•
•
•
•
•
•

POINT

can be

Restart

Procedure -- Before attempting to restart the
machine, check the alarm list to determine the cause of the
shutdown. If the shutdown alarm for a particular circuit has
occurred, determine and correct the cause before allowing the
unit to run under its own control again. When there is problem,
the unit should be diagnosed in Service Test mode. The alarms
must be reset before the circuit can operate in either Normal
mode or Service Test mode.

2.

Using the voltage reading obtained,
perature from Tables 97-100.

read the sensor tem-

3.

To check thermistor accuracy, measure temperature at
probe location
with an accurate
thermocouple-type
temperature-measuring
instrument. Insulate thermocouple to avoid ambient temperatures
from influencing
reading. Temperature
measured by thermocouple
and
temperature determined from thermistor voltage reading
should be close, 5 ° F (3 ° C) if care was taken in applying
thermocouple and taking readings.

Ifa more accurate check is required, unit must be shut down
and thermistor removed and checked at a known temperature
(freezing point or boiling point of water) using either voltage
drop measured across thermistor at the J8 terminal, or by determining the resistance with unit shut down and thermistor disconnected from J8. Compare the values determined with the
value read by the control in the Temperatures mode using the
scrolling marquee display.
77

Transducer

Troubleshooting

E

On 48/50AJ,AK,

the suction and discharge pressure of circuits A and B. The
pressure/voltage
characteristics of these transducers are shown
in Tables 103 and 104. The accuracy of these transducers can
be verified by connecting an accurate pressure gage to the second refrigerant port in the suction line.

AW, AY units, the electronic
control
uses 2 suction
pressure
transducers
to measure
the suction pressure
of circuits A and B.
The pressure/voltage
characteristics
of these transducers
are in
shown
in Tables 101 and 102. On 48/50A2,A3,A4,A5
units,
the electronic

control

uses

4 pressure

transducers

to measure

Table 94 -- Cooling Service Analysis
COMPRESSOR
Active Alarm

PROBLEM
DOES NOT RUN

SOLUTION
Check active alarms using local display.

Contactor Open
1. Power off.
2. Fuses blown in field power circuit.
3. No control power.
4. Compressor

1. Restore power.
2. After finding cause and correcting, replace with correct size fuse.
3. Check secondary fuse(s); replace with correct type and size.
Replace transformer if primary windings receiving power.
4. Check for excessive compressor current draw. Reset breaker;
replace if defective.
5. Reset lockout circuit at circuit breaker.
6. Check for refrigerant overcharge, obstruction of outdoor airflow, air
in system or whether compressor discharge valve is fully open. Be
sure outdoor fans are operating correctly.
7. Tighten all connections.

circuit breaker tripped.

5. Safety device lockout circuit active.
6. High-pressure switch open.
7. Loose electrical connections.
Contactor Closed
1. Compressor leads loose.
2. Motor windings open.
3. Single phasing.
4. ASTP activated (48/50A2,A3,A4,A5

1. Check connections.
2. See compressor service literature.
3. Check for blown fuse. Check for loose connection at compressor
terminal.
4. Allow 30 to 120 minutes for cool down. See Compressor Safeties
section on page 39.

only)

COMPRESSOR STOPS ON HIGH PRESSURE
Outdoor Fan On
1. High-pressure switch faulty.
2. Airflow restricted.
3. Air recirculating.
4. Noncondensables
in system.
5. Refrigerant overcharge.
6. Line voltage incorrect.
7. Refrigerant system restrictions.

1.
2.
3.
4.
5.
6.
7.

Replace switch.
Remove obstruction.
Clear airflow area.
Purge and recharge as required.
Purge as required.
Consult power company.
Check or replace filter drier, expansion valve, etc. Check that
compressor discharge valve is fully open.
8. Correct wiring.

8. Fan running in reverse direction.
Outdoor Fan Off
1. Fan slips on shaft.
2. Motor not running.
3. Motor overload open.
4. Motor burned out.
COMPRESSOR CYCLES ON LOW PRESSURE
Indoor-Air Fan Running
1. Filter drier plugged.
2. Expansion valve power head defective.
3. Low refrigerant charge.
4. Faulty pressure transducer.
Airflow Restricted
1. Coil iced up.
2. Coil dirty.
3. Air filters dirty.
4. Dampers closed.
Indoor-Air Fan Stopped
1. Electrical connections loose.
2. Fan relay defective.
3. Motor overload open.
4. Motor defective.
5. Fan belt broken or slipping.
LEGEND
ASTP -VFD --

Advanced Scroll Temperature Protection
Variable Frequency Drive

78

1.
2.
3.
4.

Tighten fan hub setscrews.
Check power and capacitor.
Check overload rating. Check for fan blade obstruction.
Replace motor.

1.
2.
3.
4.

Replace filter drier.
Replace power head.
Add charge.
Check that pressure transducer is connected and secured to suction line. If still not functioning, replace transducer.

1.
2.
3.
4.

Check
Clean
Clean
Check

1.
2.
3.
4.
5.

Tighten all connections.
Replace relay.
Power supply.
Replace motor.
Replace or tighten belt.

refrigerant charge.
coil fins.
or replace filters.
damper operation and position.

Table 94 -- Cooling Service Analysis (cont)
PROBLEM

SOLUTION

COMPRESSOR RUNNING BUT COOLING INSUFFICIENT
Suction Pressure Low
1. Refrigerant charge low.
2. Head pressure low.
3. Air filters dirty.
4. Expansion valve power head defective.
5. Indoor coil partially iced.
6. Indoor airflow restricted.

1.
2.
3.
4.
5.
6.

Suction Pressure High
Heat load excessive.

Check for open doors or windows.

UNIT OPERATES TOO LONG OR CONTINUOUSLY
1. Low refrigerant charge.
2. Control contacts fused.
3. Air in system.
4. Partially plugged expansion valve or filter drier.
SYSTEM IS NOISY
1. Piping vibration.
2. Compressor noisy.
COMPRESSOR LOSES OIL
1. Leak in system.
2. Crankcase heaters not energized during shutdown.
FROSTED SUCTION LINE
Expansion valve admitting excess refrigerant.

1.
2.
3.
4.

Add refrigerant
Replace control.
Purge and evacuate system.
Clean or replace.

1. Support piping as required.
2. Replace compressor.
1. Repair leak.
2. Check wiring and relays. Check heater and replace if defective.
Adjust expansion valve.

HOT LIQUID LINE
1. Shortage of refrigerant due to leak.
2. Expansion valve opens too wide.
FROSTED LIQUID LINE
Restricted filter drier.

1. Repair leak and recharge.
2. Adjust expansion valve.
Remove restriction or replace.

INDOOR FAN CONTACTOR OPEN
1. Power off.
2. Fuses blown in field power circuit.
3. No control power.

1. Restore power.
2. After finding cause and correcting, replace with correct fuses.
3. Check secondary fuses. Replace with correct type and size.
Replace transformer if primary windings are receiving power.

INDOOR FAN CONTACTOR CLOSED
1. VFD overload function tripped.

1. Refer to separate VFD technical manual for troubleshooting
instructions.
2. Check connections at motor lead junction box.
3. Check motor windings.
4. Check for blown fuse. Check for loose connections at motor
junction box.
5. Check belts. Replace as complete set if necessary.
6. Check for excessive current draw. Reset breaker. Replace if
defective.

2. Motor leads loose.
3. Motor windings open.
4. Single phasing.
5. Belts broken or thrown.
6. Circuit breaker tripped.
LEGEND
ASTP -VFD --

Add refrigerant,
Check refrigerant charge,
Clean or replace filters,
Replace power head,
Check low-pressure setting,
Remove obstruction,

Advanced Scroll Temperature Protection
Variable Frequency Drive

79

Table 95 -- Gas Heating Service Analysis
PROBLEM
Burners Will Not Ignite.

Inadequate

Heating.

CAUSE

Check active alarms using ComfortLink
marquee.

No power to unit.
No power to IGC (Integrated Gas Control).

Check power supply, fuses, wiring, and circuit breakers.
Check fuses and plugs.

Heaters off due to time guard to prevent short
cycling.
Control calling for Cooling.

Check using ComfortLink scrolling marquee.

No gas at main burners.

Check gas line for air and purge as necessary. After purging gas line of air, allow gas to dissipate for at least 5 minutes before attempting to re-light unit.

Water in gas line.

Drain water and install drip.

Dirty air filters.
Gas input too low.

Replace air filters.
Check gas pressure at manifold. Refer to gas valve adjustment in Installation, Start-up, and Service Manual.

Control calling for Wlonly
Unit undersized for load.

Poor Flame Characteristics.

REMEDY

Active alarm.

(low heat).

TM

scrolling

Check using ComfortLink scrolling marquee.

Allow time for W2 to energize.
Decrease load.

Restricted airflow.

Remove restriction.

Too much outdoor air.

Check economizer position and configuration. Adjust minimum position using ComfortLink scrolling marquee.

Limit switch cycles main burners.

Check rotation of blower, thermostat heat anticipator settings, and temperature rise of unit. Adjust as needed.
Check all screws around flue outlets and burner compartment. Tighten as necessary.

Incomplete combustion (lack of combustion air)
results in: Aldehyde odors, CO, sooting flame, or
floating flame.

Cracked heat exchanger, replace.
Unit is over-fired, reduce input. Adjust gas line or manifold
)ressure.
Check vent for restriction. Clean as necessary.
Check orifice to burner alignment.

Burners Will Not Turn Off.

Unit is in minimum on-time.

Check using ComfortLink scrolling marquee.

Unit running in Service Test mode.

Check using ComfortLink scrolling marquee.

Table 96 -- Electric Heat Service Analysis
PROBLEM
No Heat.

CAUSE

REMEDY

Power failure.

Call power company.

Fuse blown or circuit breaker tripped.

Replace fuse or reset circuit breaker.

Thermostat occupancy
ing for Heating.

Check using ComfortLink scrolling marquee.

schedule set point not call-

No 24 vac at primary contactor.

Check transformer

No power (high voltage) to L2 of primary contactor.

Check safety switches "one-shot" backup and auto limit.

Bad electrical elements.

Power off unit and remove high voltage wires. Check resistance of heater, replace if open.

80

and circuit breaker.

I

I

I F_ MODPlED
- _

2 FLUS

(HEAT_3)
FAN DELAY

I._
r-

ON

- OPENk'qG OF UMIT

IN[_.,ATES _
_
CLOSED GAS VALVE

CYCLED 4 TIMES ON SINGLE
CALL FOR HEAT

_
(No i_aon

wL_

15 m/_ee)

F/_I MOTOR
COMPRESSOR
&
ST,,a_q"
_TELY

I

/

I

INDOOR
FAN
1 FOR
SECOND
ON I_LAY

I

1

I
I
I

/

6 FLASHES - INDUCED DRAFT
MOTOf_ FALILT
(No _gnal from the H_J Em_ct
Sensor for eO seoor_)

t

I

1.
2.
&
4.

BLOWN 5 _P
FUSE
DEFECTIVE 24V TRANS.
BROKEN '€_tRE
NO _
TO UNIT

HEATING

t
'Wf FROM BASE CONTROL
BOARD
ON IGC - 1 MINUTE LOCK-ON

RELAY

COMBUSTION RELAY

ENERGIZES

'W'

ON IGC 18 ENERGIZED

TEP_INAL
'Cl_ ONDRAFT
B_=RGI_-'_
INDUCED

MOTOR

(IOM)

t
7 FLASHES
ROLLOUT
- _ SWITCH OF

F_ s'r_
i __ IMME,OIATELY
AND III

_I--

EFFECT
SENSOR
SENDS
CORRECI"
SIGNAL
'Jl' ONHN_
K31C
IF IDM iS
TURNING
AT CORRECT
SPEED
(ATTOL_ TERMINAL
2400 RPM),

I

I

,

SOFTWARE
FAULT
8 FLASHES
- _

I

OR

I

FOR ff4l:X:X_ FAN

9 FLASHES
LOCKOUT
- SOFTWARE
IF UMIT SWITCH/kND

ROLLOUT

SWITCH ARE CLOSED, IGC SAFETY
LOGIC V_LL INMATE IGNmON
SEQUENCE

I
I

4,
_

4,

CRF__I_S

IGC SAFETY LOGIC OPENS GAS
VhLVE FOR 5 SECONDS

A

10,000 VOLT SPARK FOR 5
SECONDS

I

I

OFF GAS VALVE AND SPARK
IGC SAFETY LOGIC WILL SHUT

4,

Yes

EXCHANGER
HAS BEEN REDUCED
TRIPS)

_

DUE TO LIMIT,S%"_TI'(:Trl
I

"WILL_E

BLOWIER RELAY

I

_
5 SECONOS(OR
ANOTHER5 SECONDS)FROM
INDOORFAN ON TIME DELAY

Yes

1'
I

_n'_4

,

LC_,_cxrr

t
No

LEGEND
IDM
IGC

---

Induced-Draft Motor
Integrated Gas Unit Controller

NOTE: Thermostat
"AUTO" position,

Fan

Switch

in

I

HEATI_
_

=T_ED

I

the
I

E)M STOPS, SPFETY LOGIC SHUTS OFF _

,

V/_.VE

(DBLAY EXTENDED BY 5 SECONDS FOR EACH LIMIT SW_TCH TRP
45 SECOND
MAXIMUMBLOW_
DELAY: _LrrOFF
3 MINUTES)DELAY

Fig. 14 -- IGC Service Analysis Logic

81

I

'
}

Table 97 -- 5K Thermistor Temperature vs. Resistance (SCT Sensors) (English)
TEMP
(F)

VOLTAGE
DROP

-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

3.699
3.689
3.679
3.668
3.658
3.647
3.636
3.624
3.613
3.601
3.588
3.576
3.563
3.550
3.536
3.523
3.509
3.494
3.480
3.465
3.450
3.434
3.418
3.402
3.386
3.369
3.352
3.335
3.317
3.299
3.281
3.262
3.243
3.224
3.205
3.185
3.165
3.145
3.124
3.103
3.082
3.060
3.038
3.016
2.994
2.972
2.949
2.926
2.903
2.879
2.856
2.832
2.808
2.784
2.759
2.735
2.710
2.685
2.660
2.634
2.609
2.583
2.558
2.532
2.506
2.480
2.454
2.428
2.402
2.376
2.349
2.323
2.296
2.270
2.244
2.217
2.191
2.165
2.138
2.112
2.086
2.060
2.034
2.008

(v)

RESISTANCE
(Ohms)
98,010
94,707
91,522
88,449
85,486
82,627
79,871
77,212
74,648
72,175
69,790
67,490
65,272
63,133
61,070
59,081
57,162
55,311
53,526
51,804
50,143
48,541
46,996
45,505
44,066
42,679
41,339
40,047
38,800
37,596
36,435
35,313
34,231
33,185
32,176
31,202
30,260
29,351
28,473
27,624
26,804
26,011
25,245
24,505
23,789
23,096
22,427
21,779
21,153
20,547
19,960
19,393
18,843
18,311
17,796
17,297
16,814
16,346
15,892
15,453
15,027
14,614
14,214
13,826
13,449
13,084
12,730
12,387
12,053
11,730
11,416
11,112
10,816
10,529
10,250
9,979
9,717
9,461
9,213
8,973
8,739
8,511
8,291
8,076

(F)

VOLTAGE
DROP
(V)

59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142

1.982
1.956
1.930
1.905
1.879
1.854
1.829
1.804
1.779
1.754
1.729
1.705
1.681
1.656
1.632
1.609
1.585
1.562
1.538
1.516
1.493
1.470
1.448
1.426
1.404
1.382
1.361
1.340
1.319
1.298
1.278
1.257
1.237
1.217
1.198
1.179
1.160
1.141
1.122
1.104
1.086
1.068
1.051
1.033
1.016
0.999
0.983
0.966
0.950
0.934
0.918
0.903
0.888
0.873
0.858
0.843
0.829
0.815
0.801
0.787
0.774
0.761
0.748
0.735
0.723
0.710
0.698
0.686
0.674
0.663
0.651
0.640
0.629
0.618
0.608
0.597
0.587
0.577
0.567
0.557
0.548
0.538
0.529
0.520

TEMP

RESISTANCE
(Ohms)
7,686
7,665
7,468
7,277
7,091
6,911
6,735
6,564
6,399
6,238
6,081
5,929
5,781
5,637
5,497
5,361
5,229
5,101
4,976
4,855
4,737
4,622
4,511
4,403
4,298
4,196
4,096
4,000
3,906
3,814
3,726
3,640
3,556
3,474
3,395
3,318
3,243
3,170
3,099
3,031
2,964
2,898
2,835
2,773
2,713
2,655
2,597
2,542
2,488
2,436
2,385
2,335
2,286
2,239
2,192
2,147
2,103
2,060
2,018
1,977
1,937
1,898
1,860
1,822
1,786
1,750
1,715
1,680
1,647
1,614
1,582
1,550
1,519
1,489
1,459
1,430
1,401
1,373
1,345
1,318
1,291
1,265
1,240
1,214

82

TEMP
(F)
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225

VOLTAGE
DROP

(v)
0.511
0.502
0.494
0.485
0.477
0.469
0.461
0.453
0.445
0.438
0.430
0.423
0.416
0.408
0.402
0.395
0.388
0.381
0.375
0.369
0.362
0.356
0.350
0.344
0.339
0.333
0.327
0.322
0.317
0.311
0.306
0.301
0.296
0.291
0.286
0.282
0.277
0.272
0.268
0.264
0.259
0.255
0.251
0.247
0.243
0.239
0.235
0.231
0.228
0.224
0.220
0.217
0.213
0.210
0.206
0.203
0.200
0.197
0.194
0.191
0.188
0.185
0.182
0.179
0.176
0.173
0.171
0.168
0.165
0.163
0.160
0.158
0.155
0.153
0.151
0.148
0.146
0.144
0.142
0.140
0.138
0.135
0.133

RESISTANCE
(Ohms)
1,190
1,165
1,141
1,118
1,095
1,072
1,050
1,029
1,007
986
965
945
925
906
887
868
850
832
815
798
782
765
750
734
719
705
690
677
663
650
638
626
614
602
591
581
570
561
551
542
533
524
516
508
501
494
487
480
473
467
461
456
450
445
439
434
429
424
419
415
410
405
401
396
391
386
382
377
372
367
361
356
350
344
338
332
325
318
311
304
297
289
282

Table 98 -- 5K Thermistor Temperature vs. Resistance (SCT Sensors) (SI)
TEMP

(c)
-32
-31
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14

VOLTAGE
DROP
(V)
3.705
3.687
3.668
3.649
3.629
3.608
3.586
3.563
3.539
3.514
3.489
3.462
3.434
3.406
3.376
3.345
3.313
3.281
3.247
3.212
3.177
3.140
3.103
3.065
3.025
2.985
2.945
2.903
2.860
2.817
2.774
2.730
2.685
2.639
2.593
2.547
2.500
2.454
2.407
2.360
2.312
2.265
2.217
2.170
2.123
2.076
2.029

RESISTANCE
(Ohms)

TEMP
(C)

100,260
94,165
88,480
83,170
78,125
73,580
69,250
65,205
61,420
57,875
54,555
51,450
48,536
45,807
43,247
40,845
38,592
38,476
34,489
32,621
30,866
29,216
27,633
26,202
24,827
23,532
22,313
21,163
20,079
19,058
18,094
17,184
16,325
15,515
14,749
14,026
13,342
12,696
12,085
11,506
10,959
10,441
9,949
9,485
9,044
8,627
8,231

15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

VOLTAGE
DROP

(v)
1.982
1.935
1.889
1.844
1.799
1.754
1.710
1.666
1.623
1.580
1.538
1.497
1.457
1.417
1.378
1.340
1.302
1.265
1.229
1.194
1.160
1.126
1.093
1.061
1.030
0.999
0.969
0.940
0.912
0.885
0.858
0.832
0.807
0.782
0.758
0.735
0.713
0.691
0.669
O.649
0.629
0.610
0.591
0.573
0.555
0.538
0.522

83

RESISTANCE
(Ohms)

TEMP
(C)

7,855
7,499
7,161
6,840
6,536
6,246
5,971
5,710
5,461
5,225
5,000
4,786
4,583
4,389
4,204
4,028
3,861
3,701
3,549
3,404
3,266
3,134
3,008
2,888
2,773
2,663
2,559
2,459
2,363
2,272
2,184
2,101
2,021
1,944
1,871
1,801
1,734
1,670
1,609
1,550
1,493
1,439
1,387
1,337
1,290
1,244
1,200

62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

VOLTAGE
DROP

(v)
0.506
0.490
0.475
0.461
0.447
0.433
0.420
0.407
0.395
0.383
0.371
0.360
0.349
0.339
0.329
0.319
0.309
0.300
0.291
0.283
0.274
0.266
0.258
0.251
0.244
0.237
0.230
0.223
0.217
0.211
0.204
0.199
0.193
0.188
0.182
0.177
0.172
0.168
0.163
0.158
0.154
0.150
0.146
0.142
0.138
0.134

RESISTANCE
(Ohms)
1,158
1,118
1,079
1,041
1,006
971
938
9O6
876
836
805
775
747
719
693
669
645
623
602
583
564
547
531
516
502
489
477
466
456
446
436
427
419
410
402
393
385
376
367
357
346
335
324
312
299
285

Table 99 -- 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (English)
TEMP

(F)
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60

VOLTAGE
DROP (V)
4.758
4.750
4.741
4.733
4.724
4.715
4.705
4.696
4.686
4.676
4.665
4.655
4.644
4.633
4.621
4.609
4.597
4.585
4.572
4.560
4.546
4.533
4.519
4.505
4.490
4.476
4.461
4.445
4.429
4.413
4.397
4.380
4.363
4.346
4.328
4.310
4.292
4.273
4.254
4.235
4.215
4.195
4.174
4.153
4.132
4.111
4.089
4.067
4.044
4.021
3.998
3.975
3.951
3.927
3.903
3.878
3.853
3.828
3.802
3.776
3.750
3.723
3.697
3.670
3.654
3.615
3.587
3.559
3.531
3.503
3.474
3.445
3.416
3.387
3.357
3.328
3.298
3.268
3.238
3.208
3.178
3.147
3.117
3.086
3.056
3.025

RESISTANCE
(Ohms)
196,453
189,692
183,300
177,000
171,079
165,238
159,717
154,344
149,194
144,250
139,443
134,891
130,402
126,183
122,018
118,076
114,236
110,549
107,006
103,558
100,287
97,060
94,020
91,019
88,171
85,396
82,729
80,162
77,662
75,286
72,940
70,727
68,542
66,465
64,439
62,491
60,612
58,781
57,039
55,319
53,693
52,086
50,557
49,065
47,627
46,240
44,888
43,598
42,324
41,118
39,926
38,790
37,681
36,610
35,577
34,569
33,606
32,654
31,752
30,860
30,009
29,177
28,373
27,597
26,838
26,113
25,396
24,715
24,042
23,399
22,770
22,161
21,573
20,998
20,447
19,903
19,386
18,874
18,384
17,904
17,441
16,991
16,552
16,131
15,714
15,317

TEMP
(F)
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

VOLTAGE
DROP (V)
2.994
2.963
2.932
2.901
2.870
2.839
2.808
2.777
2.746
2.715
2.684
2.653
2.622
2.592
2.561
2.530
2.500
2.470
2.439
2.409
2.379
2.349
2.319
2.290
2.260
2.231
2.202
2.173
2.144
2.115
2.087
2.059
2.030
2.003
1.975
1.948
1.921
1.894
1.867
1.841
1.815
1.789
1.763
1.738
1.713
1.688
1.663
1.639
1.615
1.591
1.567
1.544
1.521
1.498
1.475
1.453
1.431
1.409
1.387
1.366
1.345
1.324
1.304
1.284
1.264
1.244
1.225
1.206
1.187
1.168
1.150
1.132
1.114
1.096
1.079
1.062
1.045
1.028
1.012
0.996
0.980
0.965
0.949
0.934
0.919
0.905

84

RESISTANCE
(Ohms)
14,925
14,549
14,180
13,824
13,478
13,139
12,814
12,493
12,187
11,884
11,593
11,308
11,031
10,764
10,501
10,249
10,000
9,762
9,526
9,300
9,078
8,862
8,653
8,448
8,251
8,056
7,869
7,685
7,507
7,333
7,165
6,999
6,838
6,683
6,530
6,383
6,238
6,098
5,961
5,827
5,698
5,571
5,449
5,327
5,210
5,095
4,984
4,876
4,769
4,666
4,564
4,467
4,370
4,277
4.185
4,096
4,008
3,923
3,840
3,759
3,681
3,603
3,529
3,455
3,383
3,313
3,244
3,178
3,112
3,049
2,986
2,926
2,866
2,809
2,752
2,697
2,643
2,590
2,539
2,488
2,439
2,391
2,343
2,297
2,253
2,209

TEMP
(F)
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225

VOLTAGE
DROP (V)
0.890
0.876
0.862
0.848
0.835
0.821
0.808
0.795
0.782
0.770
0.758
0.745
0.733
0.722
0.710
0.699
0.687
0.676
0.666
0.655
0.645
0.634
0.624
0.614
0.604
0.595
0.585
0.576
0.567
0.558
0.549
0.540
0.532
0.523
0.515
0.507
0.499
0.491
0.483
0.476
0.468
0.461
0.454
0.447
0.440
0.433
0.426
0.419
0.413
0.407
0.400
0.394
0.388
0.382
0.376
0.370
0.365
0.359
0.354
0.349
0.343
0.338
0.333
0.328
0.323
0.318
0.314
0.309
0.305
0.300
0.296
0.292
0.288
0.284
0.279
0.275
0.272
0.268
0.264

RESISTANCE
(Ohms)
2,166
2,124
2,083
2,043
2,003
1,966
1,928
1,891
1,855
1,820
1,786
1,752
1,719
1,687
1,656
1,625
1,594
1,565
1,536
1,508
1,480
1,453
1,426
1,400
1,375
1,350
1,326
1,302
1,278
1,255
1,233
1,211
1,190
1,169
1,148
1,128
1,108
1,089
1,070
1,052
1,033
1,016
998
981
964
947
931
915
9OO
885
87O
855
841
827
814
8OO
787
774
762
749
737
725
714
7O2
691
68O
67O
659
649
639
629
62O
610
601
592
583
574
566
557

Table 100 -- 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (SI)
TEMP

VOLTAGE
DROP (V)

(c)
-32
-31
-30
-29
-28
-27
-26
-25
-24
-23
-22
-21
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14

4.762
4.748
4.733
4.716
4.700
4.682
4.663
4.644
4.624
4.602
4.580
4.557
4.533
4.508
4.482
4.455
4.426
4.397
4.367
4.335
4.303
4.269
4.235
4.199
4.162
4.124
4.085
4.044
4.003
3.961
3.917
3.873
3.828
3.781
3.734
3.686
3.637
3.587
3,537
3.485
3.433
3.381
3.328
3.274
3.220
3.165
3.111

RESISTANCE
(Ohms)
200,510
188,340
177,000
166,342
156,404
147,134
138,482
130,402
122,807
115,710
109,075
102,868
97,060
91,588
86,463
81,662
77,162
72,940
68,957
65,219
61,711
58,415
55,319
52,392
49,640
47,052
44,617
42,324
40,153
38,109
36,182
34,367
32,654
31,030
29,498
28,052
26,686
25,396
24,171
23,013
21,918
20,883
19,903
18,972
18,090
17,255
16,474

TEMP
(C)

VOLTAGE
DROP (V)

15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61

3.056
3.000
2.944
2.889
2.833
2.777
2.721
2.666
2.610
2.555
2.500
2.445
2.391
2.337
2.284
2.231
2.178
2.127
2.075
2.025
1.975
1.926
1.878
1.830
1.784
1.738
1.692
1.648
1.605
1.562
1.521
1.480
1.439
1.400
1.362
1.324
1.288
1.252
1.217
1.183
1.150
1.117
1.086
1.055
1.025
0.996
0.968

RESISTANCE
(Ohms)
15,714
15,000
14,323
13,681
13,071
12,493
11,942
11,418
10,921
10,449
10,000
9,571
9,164
8,776
8,407
8,056
7,720
7,401
7,096
6,806
6,530
6,266
6,014
5,774
5,546
5,327
5,117
4,918
4,727
4,544
4,370
4,203
4,042
3,889
3,743
3,603
3,469
3,340
3,217
3,099
2,986
2,878
2,774
2,675
2,579
2,488
2,400

TEMP
(C)

VOLTAGE
DROP (V)

62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

0.940
0.913
0.887
0.862
0.837
0.813
0.790
0.767
0.745
0.724
0.703
0.683
0.663
0.645
0.626
0.608
0.591
0.574
0.558
0.542
0.527
0.512
0.497
0.483
0.470
0.457
0.444
0.431
0.419
0.408
0.396
0.386
0.375
0.365
0.355
0.345
0.336
0.327
0.318
0.310
0.302
0.294
0.287
0.279
0.272
0.265

RESISTANCE
(Ohms)
2,315
2,235
2,157
2,083
2,011
1,943
1,876
1,813
1,752
1,693
1,637
1,582
1,530
1,480
1,431
1,385
1,340
1,297
1,255
1,215
1,177
1,140
1,104
1,070
1,037
1,005
974
944
915
889
861
836
811
787
764
742
721
7OO
68O
661
643
626
609
592
576
561

Table 101 -- Suction Pressure Transducer Pressure (PSIG) vs. Voltage (SP-A, SP-B, SP.XR=0,
48/50AJ,AK,AW,AY
Units Only)
PRESSURE
(PSIG)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

VOLTAGE
DROP (V)
0.290
0.324
0.357
0.391
0.425
0.458
0.492
0.526
0.560
0.593
0.627
0.661
0.694
0.728
0.762
0.795
0.829
0.863
0.897
0.930
0.964
0.998
1.031
1.065
1.099
1.132
1.166
1.200
1.234
1.267
1.301
1.335
1.368
1.402

PRESSURE
(PSIG)
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

VOLTAGE
DROP (V)
1.436
1.470
1.503
1.537
1.571
1.604
1.638
1.672
1.705
1.739
1.773
1.807
1.840
1.874
1.908
1.941
1.975
2.009
2.042
2.076
2.110
2.144
2.177
2.211
2.245
2.278
2.312
2.346
2.380
2.413
2.447
2.481
2.514
2.548

PRESSURE
(PSIG)
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101

85

VOLTAGE
DROP (V)
2.582
2.615
2.649
2.683
2.717
2.750
2.784
2.818
2.851
2.885
2.919
2.952
2.986
3.020
3.054
3.087
3.121
3.155
3.188
3.222
3.256
3.290
3.323
3.357
3.391
3.424
3.458
3.492
3.525
3.559
3.593
3.627
3.660
3.694

PRESSURE
(PSIG)
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

VOLTAGE
DROP (V)
3.728
3.761
3.795
3.829
3.862
3.896
3.930
3.964
3.997
4.031
4.065
4.098
4.132
4.166
4.200
4.233
4.267
4.301
4.334
4.368
4.402
4.435
4.469
4.503
4.537
4.570
4.604
4.638
4.671
4.705
4.739
4.772
4.806
4.840

Table 102 -- Suction Pressure Transducer Pressure (PSIG) vs. Voltage (SP-A, SP-B, SP.XR - 1,
48/50AJ,AK,AW,AY Units Only)
PRESSURE
(PSIG)
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

VOLTAGE
DROP (V)
0.500
0.520
0.540
0.560
0.580
0.600
0.620
0.640
0.660
0.680
0.700
0.720
0.740
0.760
0.780
0.800
0.820
0.840
0.860
0.880
0.900
0.920
0.940
0.960
0.980
1.000
1.020
1.040
1.060
1.080
1.100
1.120
1.140
1.160
1.180
1.200
1.220
1.240
1.260
1.280
1.300
1.320
1.340
1.360
1.380
1.400
1.420
1.440
1.460
1.480
1.500

PRESSURE
(PSIG)
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

VOLTAGE
DROP (V)
1.520
1.540
1.560
1.580
1.600
1.620
1.640
1.660
1.680
1.700
1.720
1.740
1.760
1.780
1.800
1.820
1.840
1.860
1.880
1.900
1.920
1.940
1.960
1.980
2.000
2.020
2.040
2.060
2.080
2.100
2.120
2.140
2.160
2.180
2.200
2.220
2.240
2.260
2.280
2.300
2.320
2.340
2.360
2.380
2.400
2.420
2.440
2.460
2.480
2.500

PRESSURE
(PSIG)
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

86

VOLTAGE
DROP (V)
2.520
2.540
2.560
2.580
2.600
2.620
2.640
2.660
2.680
2.700
2.720
2.740
2.760
2.780
2.800
2.820
2.840
2.860
2.880
2.900
2.920
2.940
2.960
2.980
3.000
3.020
3.040
3.060
3.080
3.100
3.120
3.140
3.160
3.180
3.200
3.220
3.240
3.260
3.280
3.300
3.320
3.340
3.360
3.380
3.400
3.420
3.440
3.460
3.480
3.500

PRESSURE
(PSIG)
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200

VOLTAGE
DROP (V)
3.520
3.540
3.560
3.580
3.600
3.620
3.640
3.660
3.680
3.700
3.720
3.740
3.760
3.780
3.800
3.820
3.840
3.860
3.880
3.900
3.920
3.940
3.960
3.980
4.000
4.020
4.040
4.060
4.080
4.100
4.120
4.140
4.160
4.180
4.200
4.220
4.240
4.260
4.280
4.300
4.320
4.340
4.360
4.380
4.400
4.420
4.440
4.460
4.480
4.500

Table 103 -- Suction Pressure Transducer (PSIG) vs. Voltage (SP-A, SP-B, 48/50A2,A3,A4,A5
PRESSURE

VOLTAGE

PRESSURE

PSIG
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
9O
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105

VOLTAGE

PRESSURE

DR_
0.466
0.476
0.486
0.495
0.505
0.515
0.525
0.535
0.545
0.554
0.564
0.574
0.584
0.594
0.604
0.614
0.623
0.633
0.643
0.653
0.663
0.673
0.682
0.692
0.702
0.712
0.722
0.732
0.741
0.751
0.761
0.771
0.781
0.791
0.801
0.810
0.820
0.830
0.840
0.850
0.860
0.869
0.879
0.889
0.899
0.909
0.919
0.928
0.938
0.948
0.958
0.968
0.978
0.988
0.997
1.007
1.017
1.027
1.037
1.047
1.056
1.066
1.076
1.086
1.096
1.106
1.116
1.125
1.135
1.145
1.155
1.165
1.175
1.184
1.194
1.204
1.214
1.224
1.234
1.243
1.253
1.263
1.273
1.283
1.293
1.303
1.312
1.322
1.332
1.342
1.352
1.362
1.371
1.381
1.391
1.401
1.411
1.421
1.430
1.440
1.450
1.460
1.470
1.480
1.490
1.499

106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210

VOLTAGE

211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
280
231
232
288
284
285
286
237
288
239
240
241
242
243
244
245
246
247
248
249
250
251
252
258
254
255
256
257
258
259
260
261
262
268
264
265
266
267
268
269
270
271
272
278
274
275
276
277
278
279
280
281
282
288
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315

87

VOLTAGE

PSIG

PSIG

1.509
1.519
1.529
1.539
1.549
1.558
1.568
1.578
1.588
1.598
1.608
1.618
1.627
1.637
1.647
1.657
1.667
1.677
1.686
1.696
1.706
1.716
1.726
1.736
1.745
1.755
1.765
1.775
1.785
1.795
1.805
1.814
1.824
1.834
1.844
1.854
1.864
1.873
1.883
1.893
1.903
1.913
1.923
1.932
1.942
1.952
1.962
1.972
1.982
1.992
2.001
2.011
2.021
2.031
2.041
2.051
2.060
2.070
2.080
2.090
2.100
2.110
2.120
2.129
2.139
2.149
2.159
2.169
2.179
2.188
2.198
2.208
2.218
2.228
2.238
2.247
2.257
2.267
2.277
2.287
2.297
2.307
2.316
2.326
2.336
2.346
2.356
2.366
2.375
2.385
2.395
2.405
2.415
2.425
2.434
2.444
2.454
2.464
2.474
2.484
2.494
2.503
2.513
2.523
2.533

PRESSURE

Units Only)

2.543
2.553
2.562
2.572
2.582
2.592
2.602
2.612
2.622
2.631
2.641
2.651
2.661
2.671
2.681
2.690
2.700
2.710
2.720
2.730
2.740
2.749
2.759
2.769
2.779
2.789
2.799
2.809
2.818
2.828
2.838
2.848
2.858
2.868
2.877
2.887
2.897
2.907
2.917
2.927
2.936
2.946
2.956
2.966
2.976
2.986
2.996
3.005
3.015
3.025
3.035
3.045
3.055
3.064
3.074
3.084
3.094
3.104
3.114
3.124
3.133
3.143
3.153
3.163
3.173
3.183
3.192
3.202
3.212
3.222
3.232
3.242
3.251
3.261
3.271
3.281
3.291
3.301
3.311
3.320
3.330
3.340
3.350
3.360
3.370
3.379
3.389
3.399
3.409
3.419
3.429
3.438
3.448
3.458
3.468
3.478
3.488
3.498
3.507
3.517
3.527
3.537
3.547
3.557
3.566

316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
381
382
333
384
385
386
387
388
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
368
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
388
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
408
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420

3.576
3.586
3.596
3.606
3.616
3.626
3.635
3.645
3.655
3.665
3.675
3.685
3.694
3.704
3.714
3.724
3.734
3.744
3.753
3.763
3.773
3.783
3,793
3.803
3.813
3.822
3.832
3.842
3.852
3.862
3.872
3.881
3.891
3.901
3.911
3.921
3.931
3.940
3.950
3.960
3.970
3.980
3.990
4.000
4.009
4.019
4.029
4.039
4.049
4.059
4.068
4.078
4.088
4.098
4.108
4.118
4.128
4.137
4.147
4.157
4.167
4.177
4.187
4.196
4.206
4.216
4.226
4.236
4.246
4.255
4.265
4.275
4.285
4.295
4.305
4.315
4.324
4.334
4.344
4.354
4.364
4.374
4.383
4.393
4.403
4.413
4.423
4.433
4.442
4.452
4.462
4.472
4.482
4.492
4.502
4.511
4.521
4.531
4.541
4.551
4.561
4.570
4.580
4.590
4.600

Table 104 -- Discharge Pressure Transducer (PSIG) vs. Voltage (DP-A, DP-B,
48/50A2,A3,A4,A5 Units Only)
PRESSURE
(PSIG)
14.5
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94

VOLTAGE
DROP (V)
0.500
0.509
0.515
0.521
0.528
0.534
0.540
0.546
0.552
0.558
0.564
0.570
0.577
0.583
0.589
0.595
0.601
0.607
0.613
0.620
0.626
0.626
0.632
0.638
0.644
0.650
0.656
0.662
0.669
0.675
0.681
0.687
0.693
0.699
0.705
0.711
0.718
0.724
0.730
0.736
0.742
0.748
0.754
0.761
0.767
0.773
0.779
0.785
0.791
0.797
0.803
0.810
0.816
0.822
0.828
0.834
0.840
0.846
0.852
0.859
0.865
0.871
0.877
0.883
0.889
0.895
0.902
0.908
0.914
0.920
0.926
0.932
0.938
0.944
0.951
0.957
0.963
0.969
0.975
0.981
0.987

PRESSURE
(PSIG)
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175

VOLTAGE

PRESSURE

DROP(V)

(PSIG)

0.993
1.000
1.006
1.012
1.018
1.024
1.030
1.036
1.043
1.049
1.055
1.061
1.067
1.073
1.079
1.085
1.092
1.098
1.104
1.110
1.116
1.122
1.128
1.134
1.141
1.147
1.153
1.159
1.165
1.171
1.177
1.184
1.190
1.196
1.202
1.208
1.214
1.220
1.226
1.233
1.239
1.245
1.251
1.257
1.263
1.269
1.275
1.282
1.288
1.294
1.300
1.306
1.312
1.318
1.325
1.331
1.337
1.343
1.349
1.355
1.361
1.367
1.374
1.380
1.386
1.392
1.398
1.404
1.410
1.416
1.423
1.429
1.435
1.441
1.447
1.453
1.459
1.466
1.472
1.478
1.484

176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256

88

VOLTAGE
DROP (V)
1.490
1.496
1.502
1.508
1.515
1.521
1.527
1.533
1.539
1.545
1.551
1.557
1.564
1.570
1.576
1.582
1.588
1.594
1.600
1.606
1.613
1.619
1.625
1.631
1.637
1.643
1.649
1.656
1.662
1.668
1.674
1.680
1.686
1.692
1.698
1.705
1.711
1.717
1.723
1.729
1.735
1.741
1.747
1.754
1.760
1.766
1.772
1.778
1.784
1.790
1.797
1.803
1.809
1.815
1.821
1.827
1.833
1.839
1.846
1.852
1.858
1.864
1.870
1.876
1.882
1.888
1.895
1.901
1.907
1.913
1.919
1.925
1.931
1.938
1.944
1.950
1.956
1.962
1.968
1.974
1.980

PRESSURE
(PSIG)
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337

VOLTAGE
DROP (V)
1.987
1.993
1.999
2.005
2.011
2.017
2.023
2.029
2.036
2.042
2.048
2.054
2.060
2.066
2.072
2.079
2.085
2.091
2.097
2.103
2.109
2.115
2.121
2.128
2.134
2.140
2.146
2.152
2.158
2.164
2.170
2.177
2.183
2.189
2.195
2.201
2.207
2.213
2.220
2.226
2.232
2.238
2.244
2.250
2.256
2.262
2.269
2.275
2.281
2.287
2.293
2.299
2.305
2.311
2.318
2.324
2.330
2.336
2.342
2.348
2.354
2.361
2.367
2.373
2.379
2.385
2.391
2.397
2.403
2.410
2.416
2.422
2.428
2.434
2.440
2.446
2.452
2.459
2.465
2.471
2.477

Table 104 -- Discharge Pressure Transducer (PSIG) vs. Voltage (DP-A, DP-B,
48/50A2,A3,A4,A5 Units Only) (cont)
PRESSURE
(PSIG)
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420

VOLTAGE
DROP (V)
2.483
2.489
2.495
2.502
2.508
2.514
2.520
2.526
2.532
2.538
2.544
2.551
2.557
2.563
2.569
2.575
2.581
2.587
2.593
2.600
2.606
2.612
2.618
2.624
2.630
2.636
2.643
2.649
2.655
2.661
2.667
2.673
2.679
2.685
2.692
2.698
2.704
2.710
2.716
2.722
2.728
2.734
2.741
2.747
2.753
2.759
2.765
2.771
2.777
2.784
2.790
2.796
2.802
2.808
2.814
2.820
2.826
2.833
2.839
2.845
2.851
2.857
2.863
2.869
2.875
2.882
2.888
2.894
2.900
2.906
2.912
2.918
2.925
2.931
2.937
2.943
2.949
2.955
2.961
2.967
2.974
2.980
2.986

PRESSURE
(PSIG)
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503

VOLTAGE

PRESSURE

DROP(V)

(PSlG)

2.992
2.998
3.004
3.010
3.016
3.023
3.029
3.035
3.041
3.047
3.053
3.059
3.066
3.072
3.078
3.084
3.090
3.096
3.102
3.108
3.115
3.121
3.127
3.133
3.139
3.145
3.151
3.157
3.164
3.170
3.176
3.182
3.188
3.194
3.200
3.206
3.213
3.219
3.225
3.231
3.237
3.243
3.249
3.256
3.262
3.268
3.274
3.280
3.286
3.292
3.298
3.305
3.311
3.317
3.323
3.329
3.335
3.341
3.347
3.354
3.360
3.366
3.372
3.378
3.384
3.390
3.397
3.403
3.409
3.415
3.421
3.427
3.433
3.439
3.446
3.452
3.458
3.464
3.470
3.476
3.482
3.488
3.495

504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586

89

VOLTAGE
DROP (V)
3.501
3.507
3.513
3.519
3.525
3.531
3.538
3.544
3.550
3.556
3.562
3.568
3.574
3.580
3.587
3.593
3.599
3.605
3.611
3.617
3.623
3.629
3.636
3.642
3.648
3.654
3.660
3.666
3.672
3.679
3.685
3.691
3.697
3.703
3.709
3.715
3.721
3.728
3.734
3.740
3.746
3.752
3.758
3.764
3.770
3.777
3.783
3.789
3.795
3.801
3.807
3.813
3.820
3.826
3.832
3.838
3.844
3.850
3.856
3.862
3.869
3.875
3.881
3.887
3.893
3.899
3.905
3.911
3.918
3.924
3.930
3.936
3.942
3.948
3.954
3.961
3.967
3.973
3.979
3.985
3.991
3.997
4.003

PRESSURE
(PSIG)
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667

VOLTAGE
DROP (V)
4.010
4.016
4.022
4.028
4.034
4.040
4.046
4.052
4.059
4.065
4.071
4.077
4.083
4.089
4.095
4.102
4.108
4.114
4.120
4.126
4.132
4.138
4.144
4.151
4.157
4.163
4.169
4.175
4.181
4.187
4.193
4.200
4.206
4.212
4.218
4.224
4.230
4.236
4.243
4.249
4.255
4.261
4.267
4.273
4.279
4.285
4.292
4.298
4.304
4.310
4.316
4.322
4.328
4.334
4.341
4.347
4.353
4.359
4.365
4.371
4.377
4.384
4.390
4.396
4.402
4.408
4.414
4.420
4.426
4.433
4.439
4.445
4.451
4.457
4.463
4.469
4.475
4.482
4.488
4.494
4.500

Run Status-+VIEW--cHEST
-- This variable displays the
current number of heating stages active (for staged gas control
option only). Compare to following point.

Forcing

Inputs and Outputs -- Many variables may
be forced both frolI1 the CCN and directly at the local display.
This can be useful during diagnostic testing and also during
operation, typically as part of an advanced third party control
scheme. See Appendices A and B.

Run Status--+VIE W--+H.MAX-This variable displays the
maxilnum number of heat stages available for this model.
ECONOMIZER
RUN STATUS -- The Economizer Run Status
display table provides information about the economizer and can
be used to troubleshoot economizer problems. See Table 106.
The current position, commanded position, and whether the
economizer is active can be displayed. All the disabling conditions for the economizer and outside air information is also
displayed.

NOTE: In the case of a power reset, any force in effect at the
time of the power reset will be cleared.
CONTROL LEVEL FORCING -- If any of the following
points are forced with a priority level of 7 (consult CCN literature for a description of priority levels), the software clears the
force frolI1 the point if it has not been written to or forced again
within the timeont periods defined below:
Temperatures-_AIR.T-+OAT
Temperatures-_AIR.T-+RAT
Temperatures-_AIR.T-+SPT
Inputs-_RSET-+SP.RS
Inputs-_REL.H-_OA.RH
Inputs-_AIR.Q-+OAQ

Outside Air Temperature
Return Air Temperature
Space Temperature
Static Pressure Reset
Outside Air Relative Humidity
Outside Air Quality

COOL1NG INFORMATION
-- The Cooling Information run
status display table provides information on the cooling operation of the unit. See Table 107.

30 minutes
3 minutes
3 minutes
30 minutes
30 minutes
30 minutes

Current Running Capacity (C(_5tP) -- This variable represents the amount of capacity currently running as a percent.
Current Cool Stage (CUR.S)
cool stage currently running.

Run Status Menu -- The Run

Status menu provides the
user important information about the unit. The Run Status table
can be used to troubleshoot problems and to help determine
how and why the unit is operating.
AUTO VIEW OF RUN STATUS -- The Auto View of Run
Status display table provides the most important unit information. The HVAC Mode (Run Status--->VIEW--+HVA(_)
informs the user what HVAC mode the unit is currently in. Refer
to the Modes section on page 32 for information on HVAC
modes. The occupied status, unit temperatures, unit set points,
and stage information can also be shown. See Table 105.

the

Maximum Cool Stages (MAX.S) -- This variable is the maximum number of cooling stages the control is configured for
and capable of controlling.
Active Demand Limit (DEM.L) -- If demand limit is active,
this variable will represent the amount of capacity that the
control is currently limited to.
Capacity Load Factor (SMZ) -- This factor builds up or
down over time (-100 to +100) and is used as the means of adding or subtracting a cooling stage during run time. It is a normalized representation of the relationship between "Sum" and
"Z". See the SUMZ Cooling Algorithm section on page 46.
Next Stage EDT Decrease (ADD.R) -- This variable represents (if adding a stage of cooling) how much the temperature
should drop in degrees depending on the R.PCT calculation
and how much additional capacity is to be added.

Run Status--_VIEW_OCCThis variable displays the current occupancy status of the control.
Run Status--_VIEW--_MAT--This
variable displays the current value for lnixed-air temperature. This value is calculated
based on return-air and outside-mar temperatures and economizer damper position.

ADD.R
ing stage)

= R.PCT

* (C (_MP - capacity

For example: IfR.PCT
ing 20% cooling capacity
20 = 4 F ADD.R.

Run Status--->VIEW--->EDT-This variable displays the current evaporator
discharge air temperature
during Cooling
modes. This value is read at the supply air thermistor location
(or at cooling coil thermistor array if unit is equipped with hydronic heating coil).
Run Status--->VIEW--->LAT-This variable displays the current leaving-air temperature during Vent and Hydronic Heating
modes. This value is read at the supply air themlistor location.

after adding a cool-

= 0.2 and the control would be addby taking the next step up, 0.2 times

Next Stage EDT Increase (SUB.R) -- This variable represents (if subtracting a stage of cooling) how much the temperalure should rise in degrees depending on the R.PCT calculation
and how much capacity is to be subtracted.
SUB.R = R, PCT * (C (25tP - capacity
cooling stage)

after subtracting

a

For Example: If R.PCT = 0.2 and the control would be
subtracting
30% capacity by taking the next step down,
0.2 times -30 = -6 F SUB.R.

Run Status--_VIEW--_E(L
(LP -- This variable displays the
current econolnizer control point value (a target value for air
temperature leaving the evaporator coil location).
Run Status-->VIEW-->ECN.PThis variable displays the
current actual economizer position (in percentage open).

Rise Per Percent Capacity (R.PCT) -- This is a real time calculation that represents the amount of degrees of drop/rise
across the evaporator coil versus percent of current running
capacity.

Run Status-->VIEW_,CL(AP
-- This variable displays the
current cooling control point (a target value for aiartemperature
leaving the evaporator coil location).
unit

represents

Requested Cool Stage (REQ.S)
-- This variable represents
the requested cool stage. Cooling relay time guards in place
may prevent the requested
cool stage from matching the
current cool stage.

Run Status-+VIEW-+HVA
C -- Displays the current HVAC
Mode(s) by name. HVAC Modes include:
OFF
VENT
HIGH HEAT
STARTINGUP
HIGH COOL
FIRESHUT DOWN
SHUTTING DOWN
LOW COOL
PRESSURIZATION
DISABLED
UNOCC FREECOOL EVACUATION
SOFTSTOP REQUESTTEMPERINGHICOOL SMOKE PURGE
REM SW DISABLE
TEMPERING LOCOOL
COMP STUCK ON
TEMPERINGVENT
TEST
LOW HEAT

Run Status--_VIEW_:
current amount of

-- This variable

R.PCT

= (MAT-

EDT)/C. CAP

Cap Deadband Subtracting (YMIN) -- This is a control variable used for Low Temp Override (L. TMP) and Slow Change
Ovemde (SLOW).
YMIN = -SUB.R*0.4375

CAP -- This variable displays the
cooling capacity
(in percent of

lllaxilllUlI1).

Cap Deadband Adding (YPLU) --This is a control variable
used for High Temp Ovemde (H.TMP) and Slow Change
Ovemde (SLOW).

Run Status--+VIEW--cHr.
C.P -- This variable displays the
current heating control point, for use with staged gas control
option only (a target value for air temperature leaving the supply duct).

Y.PLU = -ADD.R*0.4375

9O

Cap Threshold Subtracting (Z.MIN) -- This parameter
used in the calculation of 334Z and is calculated as follows:
ZMIN = (bnfiguration_COOL--cZGN

is

Slow Change Cap Override (SLOW) -- With a rooftop unit,
the design rise at 100% total unit capacity is generally around
30 ° F. For a unit with 4 stages, each stage represents about
7.5 ° F of change to EDT. If stages could reliably be cycled at
very fast rates, the set point could be maintained very precisely.
Since it is not desirable to cycle compressors more than 6 cycles per hour, slow change override takes care of keeping the
PID under control when "relatively" close to set point.

* (-10 + (4*

(-SUB.R))) *0.6
Cap Threshold Adding (Z.PLU) -- This parameter is used in
the calculation of SMZ and is calculated as follows:
Z.PLU = (bnfiguration--c(OOL--cZGN
(-ADD.R))) * 0.6

* (10 + (4*

MODE TRIP HELPER -- The Mode Trip Helper table provides information on the unit modes and when the modes start
and stop. See Table 108. This information can be used to help
determine why the unit is in the current mode.

High Temp Cap Override (H. IMP) -- if stages of mechanical cooling are on and the error is greater than twice Y.PLU,
and the rate of change of error is greater than 0.5° E then a
stage of mechanical cooling will be added every 30 seconds.
This override is intended to react to situations where the load
rapidly increases.
Low Temp Cap Override (L. IMP) -- If the error is less than
twice Y.MIN, and the rate of change of error is less than
-0.5 ° E then a mechanical stage will be removed every 30 seconds. This override is intended to quickly react to situations
where the load is rapidly reduced.
Pull Down Cap Override (PULL) -- If the error from set
point is above 4° E and the rate of change is less than -1 ° F per
minute, then pulldown is in effect, and "SUM" is set to 0. This
keeps mechanical cooling stages from being added when the
error is very large, but there is no load in the space. Pulldown
for units is expected to rarely occur, but is included for the rare
situation when it is needed. Most likely pulldown will occur
when mechanical cooling first becomes available shortly after
the control goes into an occupied mode (after a warm unoccupied mode).

CCN/LINKAGE
DISPLAY
TABLE -- The CCN/Linkage
display table provides
information
on unit linkage.
See
Table 109.
COMPRESSOR
RUN HOURS DISPLAY TABLE -- The
Compressor Run Hours Display Table displays the number of
mn time hours for each compressor. See Table 110.
COMPRESSOR
STARTS DISPLAY TABLE -- The Compressor Starts Display Table displays the number of starts for
each compressor. See Table 111.
TIME GUARD DISPLAY TABLE -- The Time Guard Display Table delay time for each compressor and heat relay. See
Table 112.
SOFTWARE VERSION NUMBERS
DISPLAY TABLE -The Software Version Numbers Display Table displays the
software version numbers of the unit boards and devices. See
Table 113.

Table 105 -- Auto View of Run Status Display Table
ITEM

EXPANSION

VIEW
HVAC
OCC
MAT
EDT
LAT
EC.C.P
ECN.P
CL.C.P
C.CAP
HT.C.P
HT.ST
H.MAX

RANGE

AUTO VIEW OF RUN STATUS
ascii string spelling out the hvac modes
Occupied ?
Mixed Air Temperature
Evaporator Discharge Tmp
Leaving Air Temperature
Economizer Control Point
Economizer Act,Curr, Pos,
Cooling Control Point
Current Running Capacity
Heating Control Point
Requested Heat Stage
Maximum Heat Stages

I UNITS I

YES/NO
dF
dF
dF
0-100

Jr
dF
dF

POINT
string
OCCUPIED
MAT
EDT
LAT
ECONCPNT
ECONOPOS
COOLCPNT
CAPTOTAL
HEATCPNT
HT STAGE
HT_IAXSTG

WRITE STATUS

forcible

Table 106 -- Economizer Run Status Display Table
ITEM
ECON
ECN.P
ECN. C
ACTV
DISA
UNAV
R.EC.D
DBC
DEW
DDBC
OAEC
DEC
EDT
OAT
FORC
SFON
CLOF
OAQL
HELD
O.AIR
OAT
OA.RH
OA.E
OA.D. T

EXPANSION

RANGE

ECONOMIZER RUN STATUS
Economizer Act,Curr, Pos,
Economizer Act,Cmd,Pos,
Economizer Active ?
ECON DISABLING CONDITIONS
Econ Act, Unavailable?
Remote Econ, Disabled?
DBC - OAT Lockout?
DEW - OA Dewpt, Lockout?
DDBD- OAT > RAT Lockout?
OAEC- OA Enth Lockout?
DEC - Diff, Enth,Lockout?
EDT Sensor Bad?
OAT Sensor Bad ?
Economizer Forced ?
Supply Fan Not On 30s ?
Cool Mode Not In Effect?
OAQ Lockout in Effect ?
Econ Recovery Hold Off?
OUTSIDE AIR INFORMATION
Outside Air Temperature
Outside Air Rel, Humidity
Outside Air Enthalpy
OutsideAir Dewpoint Temp

I UNITSI

POINT

0-1 O0
0-1 O0
YES/NO

ECONOPOS
ECONOCMD
ECACTIVE

YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO

ECONUNAV
ECONDISA
DBC STAT
DEW- STAT
DDBCSTAT
OAECSTAT
DEC_STAT
EDT STAT
OAT STAT
ECONFORC
SFONSTAT
COOL OFF
OAQLOCKD
ECONHELD
OAT
OARH
OAE
OADEWTMP

91

WRITE STATUS

forcible

forcible
forcible

Table 107ITEM
COOL
C.CAP
CUR.S
REQ.S
MAX.S
DEM.L
SUMZ
SMZ
ADD.R
SUB.R
R.PCT
Y.MIN
YPLU
ZMIN
ZPLU
H.TMP
L TMP
PULL
SLOW

Cooling Information Display Table

EXPANSION

RANGE

COOLING INFORMATION
Current Running Capacity
Current Cool Stage
Requested Cool Stage
Maximum Cool Stages
Active Demand Limit
COOL CAR STAGE CONTROL
Capacity Load Factor
Next Stage EDT Decrease
Next Stage EDT Increase
Rise Per Percent Capacity
Cap Deadband Subtracting
Cap Deadband Adding
Cap Threshold Subtracting
Cap Threshold Adding
High Temp Cap Override
Low Temp Cap Override
Pull Down Cap Override
Slow Change Cap Override

I

UNITS

I

%

WRITE STATUS

POINT
CAPTOTAL
COOL STG
CL ST-AGE
CL_IAXSTG
DEM_LIM

%
-1 O0 -_ +1 O0

forcible

SMZ
ADDRISE
SUBRISE
RISE PCT
Y_MlhlUS
Y_PLUS
Z_MINUS
ZPLUS
HI TEMP
LOW TEMP
PULLDOWN
SLO CHNG

^F
^F

Table 108 -- Mode Trip Helper Display Table
ITEM
TRIP
UN.C.S
UN.C.E
OC.C.S
OC.C.E
TEMP
OC.H.E
OC.H.S
UN.H.E
UN.H.S
HVAC

EXPANSION

J

RANGE

[

UNITS

j.

MODE TRIP HELPER
Unoccup. Cool Mode Start
Unoccup. Cool Mode End
Occupied Cool Mode Start
Occupied Cool Mode End
CtI.Temp RAT,SPT or Zone
Occupied Heat Mode End
Occupied Heat Mode Start
Unoccup. Heat Mode End
Unoccup. Heat Mode Start
ascii string spelling out the hvac modes

WRITE STATUS

POINT
UCCLSTRT
UCCL END
OCCLSTRT
OCCL END
CTRLTEMP
OCHT END
OCHT,STRT
UCHT END
UCHT,STRT
string

Table 109 -- CCN/Linkage Display Table
ITEM
LINK
MODE
L.Z.T
LC.SP
LH.SP

EXPANSION
CCN - LINKAGE
Linkage Zone Control Tmp
Linkage
Setpt
Linkage Curr.
Active Cool
- CCN
Linkage Curr. Heat Setpt

Table 110-

ITEM
HRS
HR.AI
HR.A2
HR.BI
HR.B2

I

RANGE

ITEM

I

RUN HOURS
Run Hours
Run Hours
Run Hours
Run Hours

EXPANSION
COMPRESSOR STARTS
Compressor A1 Starts
Compressor A2 Starts
Compressor B1 Starts
Compressor B2 Starts

I

I

POINT

WRITE STATUS

MODELINK
LZT
LCSP
LHSP

Compressor Run Hours Display Table

RANGEI UNITSI POINTI
0-999999
0-999999
0-999999
0-999999

Table 111 -- Compressor
STRT
ST.AI
ST.A2
ST.BI
ST.B2

UNITS

dF
dF
dF

ON/OFF

EXPANSION
COMPRESSOR
Compressor A1
Compressor A2
Compressor B1
Compressor B2

I

I

92

HR_A1
HR_A2
HR_B1
HR_B2

config
config
config
config

Starts Display Table

RANGE
0-999999
0-999999
0-999999
0-999999

HRS
HRS
HRS
HRS

WRITE
STATUS

I

UNITS

I

POINT
CYA1
CYA2
CY_B1
CY_B2

I

WRITE STATUS
config
config
config
config

Table 112 -- Time Guard Display Table
ITEM
TMGD
TG.A1
TG.A2
TG.B1
TG.B2
TG.H1
TG.H2
TG.H3
TG.H4
TG.H5
TG.H6

Table
ITEM
VERS
MBB
ECB1
ECB2
SCB
CEM
MARQ
NAW

•

I UNITS I

113 -- Software

are a variety

Version

I

of different

Numbers

Display

Table

RANGE I UNITSI

POINT I WRITE
STATUS

operation. When this occurs, the control turns offthe compressor and logs a strike for the respective circuit. These alerts reset
automatically.
If the current sensor board reads OFF while the compressor
relay has been COlrunanded ON for a period of 4 continuous
seconds, an alert is generated.
Any time this alert occurs, a strike will be called out on the
affected compressor.
If three successive
strikes occur the
compressor will be locked out requiring a manual reset or
power reset of the circuit board. The clearing of strikes during
compressor operation is a combination of 3 complete cycles or
15 continuous minutes of run time operation. So, if there are
one or two strikes on the compressor and three short cycles
(ON-OFF, ON-OFF, ON-OFF) less than 15 minutes each
occur, the strikes will be reset to zero for the affected compressor. Also, if the compressor turns on and runs for 15 minutes
straight with no compressor failure, the compressor's
strikes
are cleared as well.

All alarms are displayed with a code of AXXX where the A
is the category of alarm (Pre-Alert, Alert, or Alarm) and XXX
is the number.
The response of the control system to various alerts and
alarms depends on the seriousness of the particular alert or
alarm. In the mildest case, an alert does not affect the operation
of the unit in any manner. An alert can also cause a "strike." A
"striking" alert will cause the circuit to shut down for 15 minutes. This feature reduces the likelihood of false alarms causing
a properly working system to be shut down incorrectly. If three
strikes occur before the circuit has an opportunity to show that
it can function properly, the circuit will strike out, causing the
shutdown alarm for that particular circuit. Once activated, the
shutdown alarm can only be cleared via an alarm reset.

NOTE: Until the compressor is locked out, for the first two
strikes, the alert will not be broadcast to the network, nor will
the alarm relay be closed.
The possible causes are:
•

Circuits with strikes are given an opportunity to reset their
strike counter to zero. As discussed above, a strike typically
causes the circuit to shut down. Fifteen minutes later, that
circuit will once again be allowed to run. If the circuit is able to
run for 1 minute, its replacement circuit will be allowed to shut
down (if not required to run to satisfy requested stages). However, the "troubled" circuit must run continuously for 5 minutes
with no detectable problems before the strike counter is reset to
zero.
All the alarms and alerts are SUlrunarized in Table 114.
ALARM

I WRITE STATUS

string
string
string
string
string
string
string

P -- Pre-Alert: Part of the unit is temporarily down. The
alarm is not broadcast on the CCN network. The alarm relay
is not energized. After an allowable number of retries, if the
function does not recover, the pre-alert will be upgraded to
an alert or an alarm.
T -- Alert: Part of the unit is down, but the unit is still
partially able to provide cooling or heating.
A -- Alarm: The unit is down and is unable to provide
cooling or heating.

DIAGNOSTIC

POINT
CMPA1 TG
CMPA2 TG
CMPB1 TG
CMPB2 TG
HS1TC_
HS2TG
HS3TG
HS4TG
HS5TG
HS6TG

EXPANSION

E There
alerts and alarms in the system.

•

RANGE

SOFTWARE VERSION NUMBERS
CESR131343-xx-xx
CESR131249-xx-xx
CESR131249-xx-xx
CESR131226-xx-xx
CESR131174-xx-xx
CESR131171 -xx-xx
CESR130227-xx-xx

Alarms and Alerts
•

I

EXPANSION
TIMEGUARDS
Compressor A1 Timeguard
Compressor A2 Timeguard
Compressor B1 Timeguard
Compressor B2 Timeguard
Heat Relay 1 Timeguard
Heat Relay 2 Timeguard
Heat Relay 3 Timeguard
Heat Relay 4 Timeguard
Heat Relay 5 Timeguard
Heat Relay 6 Timeguard

High-pressure
switch (HPS) open. The HPS is wired in
series with compressor relays on the MBB. If the high-pressure switch opens during compressor operation, the compressor stops, and the CS no longer detects current, causing
the control to activate this alert.

For 48/50AJ,AK,AW, AY units:
• Compressor internal overload protection is open. The internal overloads are used on the Scroll Tech compressors
(black) and smaller Maneurop compressors used on the size
020, 025, 027, 030, 035 units and 040 A1, A2 compressors.
• Internal compressor
temperature
sensor trip. The large
Maneurop compressors
(blue) used on the size 040 (B1,
B2), 050, and 060 units have an internal temperature sensor.
• Circuit breaker trip. The compressors
are protected from
short circuit by a breaker in the control box. On the size
020-035 and 040 A1, A2 units there is one breaker per two
compressors
and on the size 040 (B1, B2), 050, and 060
compressors there is one breaker per compressor because
there are not internal overloads.
• Wiring error. A wiring error might not allow the compressor
to start.

CODES AND POSSIBLE CAUSES

T051. P051 (Circuit A. Compressor 1 Failure)
T052. P052 (Circuit A. Compressor 2 Failure)
T055. P055 (Circuit B. Compressor 1 Failure)
T056. P056 (Circuit B. Compressor 2 Failure) -- Alert codes
051,052,
055, and 056 are for compressors A1, A2, B1, and
B2 respectively. These alerts occur when the current sensor
(CS) does not detect compressor
current during compressor

93

Table 114 -- Alert and Alarm Codes
ALARM OR
ALERT
NUMBER
A051

Circuit A, Compressor

P051

Circuit A, Compressor

T051
A052

ACTION TAKEN BY CONTROL

RESET
METHOD

1 Stuck On Failure

Turn off all compressors

1 Failure

Add strike to compressor

Manual
Automatic
(max 3)

Circuit A, Compressor
Circuit A, Compressor

1 Failure
2 Stuck On Failure

Compressor locked off
Turn off all compressors

P052

Circuit A, Compressor

2 Failure

Add strike to compressor

T052
A055

Circuit A, Compressor
Circuit B, Compressor

2 Failure
1 Stuck On Failure

Compressor locked off
Turn off all compressors

P055

Circuit B, Compressor

1 Failure

Add strike to compressor

T055
A056

Circuit B, Compressor
Circuit B, Compressor

1 Failure
2 Stuck On Failure

Compressor locked off
Turn off all compressors

P056

Circuit B, Compressor

2 Failure

Add strike to compressor

T056

Circuit B, Compressor 2 Failure
Circuit A Saturated Condensing Thermistor Failure
(48/50AJ,AK,AW,AY units only)
Circuit B Saturated Condensing Thermistor Failure
(48/50AJ,AK,AW,AY units only)
Evaporator Discharge Reset Sensor Failure
Outside Air Temperature Thermistor Failure
Space Temperature Thermistor Failure
Return Air Thermistor Failure

T064
T065
T072
T073
T074
T075
T076
T078
T082
T090
T091
T092
T093
Tl10
Tlll

DESCRIPTION

Outside Air Relative Humidity Sensor Failure
Return Air Relative Humidity Sensor Failure
Space Temperature Offset Sensor Failure
Circuit A Discharge Pressure Transducer Failure
Circuit B Discharge Pressure Transducer Failure
Circuit A Suction Pressure Transducer Failure
Circuit B Suction Pressure Transducer Failure
Circuit A Loss of Charge
Circuit B Loss of Charge

Compressor

locked off

Manual
Manual
Automatic
(max 3)
Manual
Manual
Automatic
(max 3)
Manual
Manual
Automatic
(max 3)
Manual

Automatic

Faulty thermistor

or wiring error

Automatic

Stop use of economizer
Unit shutdown
Continue to run unit

Automatic
Automatic
Automatic

Faulty remote input on CEM board
Faulty thermistor or wiring error
Faulty thermistor or wiring error
Faulty thermistor or wiring error
Faulty sensor or wiring error
Faulty sensor or wiring error
Faulty sensor or wiring error
Faulty sensor, wiring error
Faulty sensor, wiring error
Faulty sensor, wiring error
Faulty sensor, wiring error
Low refrigerant charge
Low refrigerant charge
Low refrigerant charge, low airflow,
dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
dirty coil, broken fan belt, TXV
problem
Low refrigerant charge, low airflow,
dirty coil, broken fan belt, TXV
problem
TXV problem, high load.
TXV problem, high load.
Dirty condenser, condenser fan
failure, system overcharged
Dirty condenser, condenser fan
failure, system overcharged
Incorrect compressor wiring
External shutdown command

Use OAT changeover control
Use differential dry bulb changeover
Use Space temperature without offset
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop circuit
Stop circuit

Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Manual

Stop circuit

Manual

Suction Temp-Comp

A2 Shutdown

T120

Circuit A Low Saturated

Suction Temperature

Alert.

Stop circuit

Automatic

A121

Circuit B Low Saturated

Suction Temperature

Alarm.

Stop circuit

Manual

P121

Circuit B Low Saturated

Suction Temp-Comp

B2 Shutdown

T121

Circuit B Low Saturated

Suction Temperature

Alert.

T122
T123

Compressor

Compressor

A2 shutdown

B2 shutdown

Automatic

Automatic

Stop circuit

Automatic

Circuit A High Saturated Suction Temperature
Circuit B High Saturated Suction Temperature

Stop circuit
Stop circuit

Manual
Manual

T126

Circuit A High Head Pressure

Stop circuit

Automatic

T127

Circuit B High Head Pressure

Stop circuit

Automatic

A140
A150
T153
A154
T155
A156
A157
A171
A172
A173
A174
T177
T178
A200
T210
T211
T220
T221

Reverse Rotation Detected

Stop unit
Stop unit
Stop unit
Stop unit
Stop unit
Stop unit
Stop unit
Stop gas heat
Stop options on CEM
Stop economizer & power exh
Stop unit
Stop demand limiting
Stop static pressure reset/VFD
Stop unit
Close economizer, stop exhaust
Stop unit
Stop IAQ control
Use a default value for IAQ

Manual
Manual
Manual
Manual
Manual
Manual
Manual
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Manual
Automatic
Automatic
Automatic
Automatic

Use software configured
minimum

Automatic

T229

Economizer

Minimum

Position Override Input Failure

High pressure switch, compressor
current, wiring error
Exceeded 3 strike limit

Unit shutdown

Circuit A Low Saturated

Indoor Air Quality Sensor Failure
Outdoor Air Quality Sensor Failure

High pressure switch, compressor
current, wiring error
Exceeded 3 strike limit
Welded contact

Use OAT for head pressure control

P120

Failure

High pressure switch, compressor
current, wiring error
Exceeded 3 strike limit
Welded contact

or wiring error

Alarm.

Linkage Timeout Error - Communication
Building Pressure Transducer Failure
Static Pressure Transducer Failure

High pressure switch, compressor
current, wiring error
Exceeded 3 strike limit
Welded contact

Faulty thermistor

Suction Temperature

Staged Gas Control Board Comm Failure
Controls Expansion Module Comm Failure
ECB1 Board Communication
Failure
ECB2 Board Communication
Failure
4-20 MA Demand Limit Failure
4-20 MA Static Pressure ResetNFD Fail

Welded contact

Automatic

Circuit A Low Saturated

Serial EEPROM Storage Failure Error
Critical Serial EEPROM Storage Failure Error
A/D Hardware Failure

CAUSE

Use OAT for head pressure control

A120

Unit is in Emergency Stop
Real Time Clock Hardware Failure
Serial EEPROM Hardware Failure

PROBABLE

94

Control Board failure, check
Control Board failure, check
Control Board failure, check
Control Board failure, check
Control Board failure, check
Control Board failure, check
Control Board failure, check
Control Board failure, check
Control Board failure, check
Input failure, wiring error
Input Failure, wiring error
Wiring errors, board failures
Sensor failure, wiring error
Sensor failure, wiring error
Sensor failure, wiring error
Sensor failure, wiring error
Input failure, wiring error

lights
lights
lights
lights
lights
lights
lights
lights
lights

Table 114 -- Alert and Alarm Codes (cont)
ALARM
OR
ALERT
NUMBER

DESCRIPTION

ACTION

TAKEN BY CONTROL

RESET
METHOD

PROBABLE

CAUSE

T300

Space Temperature

Below Limit

Stop cooling,
but continue
to heat

Automatic

Outdoor dampers stuck, no load

T301

Space Temperature

Above Limit

Stop heating,
but continue
to cool

Automatic

High load, dampers open

T302

Supply Temperature

Below Limit

Continue to run unit

Automatic

Dampers open, check configuration
setpoint

T303

Supply Temperature

Above Limit

Continue to run unit

Automatic

Dampers open, check configuration
setpoint

T304

Return Temperature

Below Limit

Continue to run unit

Automatic

Dampers open, check configuration
setpoint

T305

Return Temperature

Above Limit

Continue to run unit

Automatic

Dampers open, check configuration
setpoint

T308

Return Air Relative Humidity Below Limit

Alert

Automatic

T309

Return Air Relative Humidity Above Limit

Continue to run unit

Automatic

T310
T311
T312
T313
T314

Supply Duct Static Pressure Below Limit
Supply Duct Static Pressure Above Limit
Building Static Pressure Below Limit
Building Static Pressure Above Limit
IAQ Above Limit

Continue
Continue
Continue
Continue
Continue

Automatic
Automatic
Automatic
Automatic
Automatic

A404

Fire Shut Down Emergency

A405
A406
A407
T408
A409
T409

Evacuation Emergency Mode
Pressurization Emergency Mode
Smoke Purge Emergency Mode
Dirty Air Filter
Supply Fan Status Failure
Supply Fan Status Failure

T414

Loss of Communication

T414
T414
T414
T414
T420

Belimo Actuator Direction Error
Belimo Actuator Failure
Belimo Actuator Jammed
Belimo Actuator Range Error
R-W1 Jumper Must Be Installed to Run Heat in Service
Test

T421
T422
T423
T424
T500
T501
T502
T503
A700
T701
T702
T703
A704
T705

Thermostat Y2 Input ON without Y1 ON
Thermostat W2 Input ON without W1 ON
Thermostat Y and W Inputs ON
Thermostat G Input OFF on a Call for Cooling
Current Sensor Board Failure - A1
Current Sensor Board Failure - A2
Current Sensor Board Failure - B1
Current Sensor Board Failure - B2
Supply Air Temperature Sensor Failure
Staged Gas Thermistor 1 Failure
Staged Gas Thermistor 2 Failure
Staged Gas Thermistor 3 Failure
Staged Gas Leaving Air Temp Sum Total Failure
Limit Switch Thermistor Failure

Unit Shutdown

Automatic

VFD problem, broken fan belt
VFD problem, broken fan belt
Exhaust issues, check setpoint
Exhaust issues, check setpoint
Damper or IAQ control issues
Smoke detector switch or external
switch

Run power exhaust
Run supply fan
Run supply and exhaust fans
Continue to run unit
Stop unit
Continue to run unit

Automatic
Automatic
Automatic
Automatic
Automatic
Automatic

Special fire mode
Special fire mode
Special fire mode
Dirty filter, switch
Fan drive failure
Fan drive failure,

Automatic
Automatic
Automatic
Automatic
Automatic

Calibrate economizer, economizer
failure, wiring
Motor direction switch wrong, wiring
Motor failure
Obstruction in damper
Calibrate economizer

No heat

Automatic

Add red wire jumpers

Assume Y2 is Y1
Assume W2 is W1
Alert
Turn fan on
Stop compressor A1
Stop compressor A2
Stop compressor B1
Stop compressor B2
Stop staged gas heat
Stop staged gas heat
Stop staged gas heat
Stop staged gas heat
Stop staged gas heat
Stop staged gas heat

Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic

Thermostat wiring error
Thermostat wiring error
Thermostat issues
Thermostat or wiring issues
Faulty board or wiring
Faulty board or wiring
Faulty board or wiring
Faulty board or wiring
Faulty sensor or wiring error
Faulty sensor or wiring error
Faulty sensor or wiring error
Faulty sensor or wiring error
Faulty sensor or wiring error
Faulty switch or wiring

Mode (fire-smoke)

with the Belimo Actuator

to
to
to
to
to

run
run
run
run
run

unit
unit
unit
unit
unit

Configuration error, or sensor error
Dampers open, check configuration
setpoint

Close economizer
Close
Attempt to
Close
Close

economizer
close economizer
economizer
economizer

control
control
control
setting
or sensor failure

LEGEND
AxxxCEM -IAQ
-OAT --

Alarm
Controls Expansion module
Indoor Air Quality
Outdoor Air Temperature

PxxxTxxx -TXV
-VFD
--

Pre-Alert
Alert
Thermostatic Expansion Valve
Variable Frequency Drive

For 48/50A2,A3,A4,A5
units:
• Compressor
internal overload protector is open. Internal
overload protectors are used in the Copeland compressors in
all units except size 60 ton units with voltages of 208/230-v,
380-v, and 575-v.
• Compressor external overload protector (Kriwan module)
has activated. The Copeland compressors
in size 60 ton
units with voltages of 208/230-v, 380-v, and 575-v use
external overload protector modules that are mounted in the
compressor
wiring junction
box. Temperature
sensors
embedded in the compressor motor windings are the inputs
to the module. The module is powered with 120 vac from
the units main control box. The module output is a normally
closed contact that is wired in series with the compressor
contactor coil. In a compressor motor overload condition,
the contact opens de-energizing the compressor contactor.
• Circuit breaker trip. The compressors
are protected from
short circuit by a breaker in the control box. On the 020-050

size units there is one breaker per two compressors and on
the 060 size units there is one breaker per compressor.
Wiring Error. A wiring error might not allow the compressor to start.
To check out alerts 051,052,

055 and 056:

1. Turn on the compressor in question using Service Test
mode. If the compressor does not start, then most likely
the problem is one of the following: HPS open, open
internal protection, circuit breaker trip, incorrect safety
wiring, or incorrect compressor wiring.
2.

If the compressor
correct direction.

does start verify it is rotating

in the

IMPORTANT: Prolonged operation in the wrong direction
can damage the compressor. Correct rotation can be verified by a gage set and looking for a differential pressure
rise on start-up.
95

IMPORTANT:
If thecompressor
starts,verifythat

The cause of the alert is usually a faulty thermistor, a
shorted or open thermistor caused by a wiring error, or a loose
connection.

the

indoor and outdoor fans are operating properly.

T072 (Evaporator Discharge Reset Sensor Failure) -- If the
unit is configured to use the remote EDT 4 to 20 mA reset input ((bnfiguration--cEDT.R--cRES.S)
and the sensor reading
is less than 2 mA then the alert will occur. When this occurs the
control will default to the internal set points. The sensor is
connected to the optional CEM module. For this sensor to be
used, the EDT 4 to 20 mA reset input ((bnfiguration
-+EDT.R-+RES.S)
must be set to "enabled."

IMPORTANT: If the CS is.always detecting current, then
verify that the compressor is on. If the compressor is on,
check the contactor and the relay on the MBB. If the compressor is off and there is no current, verify CS wiring and
replace if necessary.
IMPORTANT: Return to Normal mode and observe compressor operation to verify that compressor current sensor
is working and condenser fans are energized after compressor starts.

T073 (Outside Air Temperature
Thermistor Failure) -- This
alert occurs when the outside air temperature sensor (Temperatures-+AIR.T_OAT)
is outside the range -40 to 240 F
(-40 to 116 C). Failure
of this thermistor
(Temperatures-+AIR.T_OAT)
will disable any elements of the control
which requires its use. Economizer
control beyond the vent
position and the calculation of mixed-air temperature for the
sumZ algorithin will not be possible. This alert resets automatically. The cause of the alert is usually a faulty thermistor, a
shorted or open thermistor caused by a wiring error, or a loose
connection.

A051 (Circuit A. Compressor 1 Stuck On Failure)
A052 (Circuit A. Compressor 2 Stuck On Failure)
A055 (Circuit B. Compressor
1 Stuck On Failure)
A056 (Circuit B. Compressor 2 Stuck On Failure) -- Alarm
codes 051, 052, 055, and 056 are for compressors A1, A2, B1,
B2 respectively. These alarms occur when the current sensor
(CS) detects current when the compressor should be off. When
this occurs, the control turns offthe compressor and logs a strike
for the respective circuit. Use the scrolling marquee to reset the
alarm.

T074 (Space Temperature Thermistor Failure) -- This alert
occurs when the space temperature sensor (Temperatures
---)AIR.T--+SPT) is outside the range -40 to 240 F (-40 to
116 C). This alert will only occur if the unit is configured to use
a space temperature sensor. Configuration is done through
the Unit Control Type (Configuration--_UNIT-+CTYP)
configuration.
Failure
of this thermistor
(Temperatures--+AIR.T--+SPT) will disable any elements of the control
which requires its use. If the unit is configured for SPT 2 stage
or SPT multi-stage operation and the sensor fails, no cooling or
heating mode may be chosen. This alert resets automatically.
The cause of the alert is usually a faulty thermistor in the T55,
T56, or T58 device, a shorted or open thermistor caused by a
wiring error, or a loose connection.
T075 (Return Air Thermistor Failure) -- This alert occurs
when the remm air temperature sensor (Temperatures--)AIR. T--cRAT) is outside the range -40 to 240 F (-40 to
116 C). The RAT is standard on all units and is located in the
return section near the auxiliary control box. This alert resets
automatically. The cause of the alert is usually a faulty thermistor, a shorted or open thermistor caused by a wiring error, or
a loose connection.

If the current sensor board reads ON while the compressor
relay has been colnmanded OFF for a period of 4 continuous
seconds, an alarm is generated. These alarms are only monitored for a period of 10 seconds after the compressor relay has
been colnmanded OFE This is done to facilitate a service technician forcing a relay to test a compressor.
In addition, ifa compressor stuck failure occurs and the current sensor board reports the compressor and the request off,
certain diagnostics will take place.
1. If any of the 4 compressors are diagnosed as stuck on and
the current sensor board is on and the request is off, the
control will request the supply fan which will automatically start building airflow control. Condenser fans will
also be COlrnnanded on to maintain normal head pressure.
2.

Heating will be disabled
sors has this problem.

while any one of the compres-

The possible causes are:
• welded contactor
• frozen compressor relay on MBB
To check out alarms 051,052,

1. Place the unit in Service
should be off.
2.

Failure of this thermistor (Temperatures--)AIR.T---_RAT)
will disable any elements of the control which requires its use.
Elements of failure include:

055, and 056:
Test mode.

All compressors

3.

Verify that there is not 24 v at the contactor coil. If there is
24 v at the contactor, check relay on MBB and wiring.
Check for welded contactor.

4.

Verify CS wiring.

5.

Return to Normal mode and observe compressor operation to verify that compressor current sensor is working
and condenser fans are energized after compressor starts.

•
•
•
•

the calculation of mixed air temperature for sumZ control
the selection of a mode for VAV units
economizer differential enthalpy or dry bulb control
return air temperature supply air reset

T076 (Outside Air Relative Humidity
Sensor Failure)
-This alert occurs when the outside air humidity sensor (Inputs--cREL.H_OA.RH)
has a reading less than 2 mA. Failure
of this sensor will disable any elements of the control which requires its use including economizer outdoor and differential enthalpy control. The OA.RH sensor is located in the economizer
hood and is used for control of the economizer. The sensor is a
loop powered 4 to 20 mA sensor. This alert resets automatically. The cause of the alert is usually a faulty sensor, a shorted or
open sensor caused by a wiring error, or a loose connection.
The unit must be configured to use the sensor through the Outside Air RH Sensor
((bnfiguration-cE(ON_ORH.S)
setting.

T064 (Circuit A Saturated Condensing Thermistor Failure)
T065 (Circuit B Saturated Condensing Thermistor Failure) -Alert codes 064 and 065 are for circuits A and B, respectively.
This alert code is for 48/50AJ,AK,AW, AY units only. These
alerts occur when the saturated condensing temperatures (Temperatures-¢REET-cSCT.A
and SCT.B) are outside the range
-40 to 240 F (-40 to 116 C). When this occurs, the control uses
the outdoor temperature (OAT) to control the outdoor fans. The
control will default to control based on the OAT sensor and will
turn on OFC.B when the ambient is above 65 F and off when
the ambient is below 50 E

T078 (Return Air Relative Humidity Sensor Failure) -- This
alert
occurs
when
the
remm
air humidity
sensor
(Inputs--cRELH---_RA.RH)
has a reading less than 2 mA.
Failure of this sensor (Inputs--cREL.H--cRA.RH)
will disable

If the SCT and OAT sensors have all failed then the control
should turn on OFC.B when compressors are on.
96

any elements of the control which requires its use including
economizer differential enthalpy control.
The RA.RH sensor is located in the return air section near
the auxiliary control box. The sensor is a loop powered 4 to
20 mA sensor. This alert resets automatically. The cause of the
alert is usually a faulty sensor, a shorted or open sensor caused
by a wiring error, or a loose connection. The unit must be configured to use the sensor through the Outside Air RH Sensor
(Configuration--cUNIT--+SENS--+RRI-I.S) setting.
T082 (Space Temperature Offset Sensor Failure) -- If the unit
is configured to use a space temperature sensor and is using a
T56 sensor with an offset potentiometer, then the alert will
occur if the potentiometer is outside the allowable range. The
control will default to the software applicable set point because
there is no offset available that may be applied to space temperamre. The alert will automatically clear. The unit must be configured for one of the SPT control options through the Unit
Control Type ((bnfiguration-+UNIT_C
TYP) configuration.
T090 (Circuit A Discharge Pressure Transducer Failure)
T091 (Circuit B Discharge Pressure Transducer Failure) -Alert codes 090, and 091 are for circuits A and B respectively.
These alerts occur when the unit is configured for pressure
transducers ((bnfiguration--cUNIT---_DRXR)
and the pressure is outside the range 0.0 to 667.0 psig. A circuit cannot run
when this alert is active. Use the scrolling marquee to reset the
alert. The cause of the alert is usually a faulty transducer, faulty
5v power supply, or a loose connection. Although the software
supports this option, it is not possible at the time of the writing
of this specification to order the optional discharge pressure
transducers.

of the affected circuit, if it exists, will be shut down with a local
alert (P120, P121) and a 10-minute thneguard will be added to
the compressor. If saturated suction temperature continues to
be less than 20 F for 4 minutes, less than 10 F for 2 minutes,
less than 0 ° F for 1 minute or less than -20 F for 20 seconds
continuously then compressor no. 1 will be shut down and then
an alert or alarm will be issued.
This failure follows a 3 strike methodology whereby the
first two times a circuit goes down entirely, an alert will be generated which keeps the circuit off for 15 minutes before allowing the circuit to try again. The third time this happens, an
alarm will be generated which will necessitate a manual reset
to get the circuit back running. It is hnportant to note that a
"strike" is called out only if all compressors in the circuit are
off at the time of alert!alarm.
To prevent nuisance alerts, P120 and P121 show up in the
alarm history and locally at the display but are not broadcast to
the network. To recover from these alerts, a 10-minute holdoff
timer must elapse and the saturated suction temperature must
rise above 29.32 F. If recovery occurs, staging will be allowed
on the circuit again. Again, a "strike" is tied to the circuit going
off entirely, not reducing capacity and recovering. Therefore it
is possible that multiple P120 or P121 alerts may be stored in
alarm history but not broadcast.
If there are 1 or 2 strikes on the circuit and the circuit recovers for a period of thne, it is possible to clear out the strikes
thereby resetting the strike counter automatically. The control
must have saturated suction temperature greater than or equal
to 34 F for 60 minutes in order to reset the strike counters.
T122 (Circuit A High Saturated Suction Temperature)
T123 (Circuit B High Saturated Suction Temperature) -- Alert
codes 122 and 123 occur when compressors in a circuit have
been running for at least 5 to 30 minutes ((bnfiguration
_'OOL-+H.SSI).
On 48/50AJ,AK,AW, AY units, this alert
code occurs if the circuit saturated suction temperature is greater than 60 E On 48/50A2,A3,A4,A5
units, this alert code occurs if the circuit saturated suction temperature is greater than
65 F when one compressor is running or 60 F when two compressors are running. For all units, the high saturated suction
alert is generated and the circuit is shut down. Alert code 122 is
for circuit A and 123 for circuit B.

T092 (Circuit A Suction Pressure Transducer Failure)
T093 (Circuit B Suction Pressure Transducer Failure) -- Alert
codes 092, and 093 are for circuits A and B respectively. These
alerts occur when the pressure is outside the following ranges:
0.5 to 134.5 psig when SRXR=O, 0.0 to 200.0 psig when
SRXR=I,
and 0.0 to 420.0 psig on all 48/50A2,A3,A4,A5
units. A circuit cannot mn when this alert is active. Use the
scrolling marquee to reset the alert. The cause of the alert is
usually a faulty transducer, faulty 5 v power supply, or a loose
connection.
T110 (Circuit A Loss of Charge)
Till (Circuit B Loss of Charge) -- Alert codes 110, and 111
are for circuits A, and B respectively. These alerts occur when
the compressor is OFF and the suction pressure is less than
5 psig for 48/50AJ,AK,AW, AY units or 18 psig for 48/50A2,
A3,A4,A5 units and the OAT is above -5 F for 1 continuous
minute. The alert will automatically
clear when the suction
pressure transducer reading is valid and greater than 15 psig for
48/50AJ,AK,AW, AY units or 54 psig for 48/50A2,A3,A4,A5
units. The cause of the alert is usually low refrigerant pressure
or a faulty suction pressure transducer.

T126 (Circuit A High Head Pressure)
T127 (Circuit B High Head Pressure)
-- Alert codes 126,
and 127 are for circuits A and B respectively.
On 48/
50AJ,AK,AW, AY units, these alerts occur when the appropriate saturated condensing temperature is greater 145 E Prior to
the alert, the control will shut down one compressor on a circuit
if that circuit's saturated condensing temperature is greater than
140 E If SCT continues to rise to greater than 145 F, the alert
will occur and the circuit's remaining compressor
will shut
down.

P120 (Circuit A Low Saturated Suction Temperature
-Compressor A2 Shutdown)
T120 (Circuit A Low Saturated Suction Temperature Alert)
A120 (Circuit A Low Saturated Suction Temperature Alarm)
P121 (Circuit B Low Saturated Suction Temperature
-Compressor B2 Shutdown)
T121 (Circuit B Low Saturated Suction Temperature Alert)
A121 (Circuit B Low Saturated Suction Temperature Alarm)
-- This alert/alarm is used to keep the evaporator coils from
freezing and the saturated suction temperature above the low
lfinit for the compressors.

On 48/50A2,A3,A4,A5
units, these alerts occur when the
appropriate saturated condensing temperature is greater than
150 E Prior to the alert, the control will shut down one compressor on a circuit if that circuit's saturated condensing temperature is greater than 145 F. IfSCT continues to rise to greater than 150 F, the alert will occur and the circuit's remaining
compressor will shut down.

There will be a start-up delay if the outside-air temperature
is too low. When the outdoor ambient is below 60 F, during initial start-up, saturated suction temperature will be ignored for a
period of 5 minutes. When Temperatures--cREET--cSSTA
or
Temperatures--cREET--cSSTB
is less than 20 F for 4 minutes,
less than 10 F for 2 minutes, less than 0° F for 1 minute or less
than -20 F for 20 seconds continuously, the second compressor

The alert will clear automatically
5 ° F from the time of the alert.

The cause of the alarm is usually an overcharged system,
high outdoor ambient temperature coupled with dirty outdoor
coil, plugged filter drier, or a faulty high-pressure switch.
or when the OAT drops

A140 (Reverse Rotation Detected) -- A test is made once, on
power up, for suction pressure change on the first activated circuit. The unit control determines failure is as follows:
The suction pressure of both circuits is sampled 5 seconds
before the compressor
is brought
on, right when the
97

com.pressor
isbrought
onand5seconds
afterwards.
Therateof
suction
pressure
change
from5seconds
before
thecompressor
isbrought
ontowhenthecompressor
isbrought
oniscalculated.Thentherateof suction
pressure
change
fromwhenthe
compressor
isbrought
onto5 seconds
afterwards
iscalculated.
Withtheabove
information,
thetestforreverse
rotation
is
made.
If thesuction
pressure
change
5seconds
aftercompressionisgreater
thanthesuction
pressure
change
5 seconds
beforecompression
- 1.25,
thenthere
isareverse
rotation
error.
Thisalarmwill disable
mechanical
cooling
andwillrequire
amanual
reset.
Thisalarmmaybedisabled
oncethereverse
rotation
checkhasbeenverifiedbysetting
Configuration--+
COOL---_REV.R
=Yes.
A150 (Unit is in Emergency Stop) -- If the fire safety input
condition occurs to indicate a fire or smoke condition, then
Alarm code 150 will occur and the unit will be ilrnnediately
stopped. Through separate inputs the unit can be put into purge,
evacuation, and pressurization. This requires a manual reset.

T177 (4-20 mA Demand Limit Failure) -- This alert indicates a problem with the optional remote 4 to 20 mA demand
limit signal (Inputs_4-20--cDLM.M)
that is connected to the
CEM module (if the signal reads less than 2 mA). If this
occurs, then demand limiting will be disabled. The unit must
be configured for 4 to 20 mA Demand Limiting using the
Demand Limit Select (Configuration--cDMD.L
-¢DM.L.S).
T178 (4-20 mA Static Pressure Reset/VFD Failure) -- If this
transducer fails (if the signal reads less than 2 mA on the input
of the CEM module), and the unit is configured to perform
static pressure reset or remote control of the supply fan VFD
with this transducer, no static pressure reset or VFD control
will be performed and an alert will be generated. Recovery is
automatic. Reason for error is either a faulty sensor, wiring
error, or damaged input on the CEM control board.
A200 (Linkage Timeout Error-- Comm Failure) -- If linkage is established via the CCN with ComfortlD TM terminals, a
5-minute tflneout on loss of conununication
will be monitored.
If 5 minutes expires since the last colrnnunication from a VAV
Linkage Master, the unit will remove the link and flag the alert.
When the rooftop looses its link, the temperature and set points
are derived locally. Recovery is automatic on re-establisiunent
of colrnnunications.
Reason for failure may be wiring error, too
much bus activity, or damaged 485 drivers.

If the CCN point name "EMSTOP" in the System table is
set to emergency stop, the unit will shut down immediately and
broadcast an alarm back to the CCN indicating that the unit is
down. This alarm will clear when the variable is set back to
"enable."
T153 (Real Time Clock Hardware Failure) -- A problem has
been detected with the real timeclock on the MBB. Try resetting the power and check the indicator lights. If the alert continues, the board should be replaced.

T210 (Building Pressure Transducer Failure) -- The building
pressure transducer (Pressures-+AIR.P-+BP)
fails if the
signal from the 4 to 20 mA building pressure transducer (used
to control the power exhaust fans and the building pressure) is
below 2 mA. If the alert occurs, then the economizer will be
closed and the power exhaust fans mined off. This alert will
automatically reset. Check the building pressure transducer and
sensor robing. The sensor is located in the auxiliary control
box. The alert will automatically reset.

A154 (Serial EEPROM Hardware Failure) -- A problem has
been detected with the EEPROM on the MBB. Try resetting
the power and check the indicator lights. If the alarm continues,
the board should be replaced.
T155 (Serial EEPROM Storage Failure Error) -- A problem
has been detected with the EEPROM storage on the MBB. Try
resetting the power and check the indicator lights. If the alert
continues, the board should be replaced.

T211 (Static Pressure Transducer Failure) -- The static pressure transducer (Pressures-+AIR.P-+SP)
fails if the signal
from the 4 to 20 mA static pressure transducer (used to control
the VFD speed) is below 2 mA. This failure will cause the unit
to stop due to the potential damage that could occur due to
over-pressurization.
Check the pressure transducer and sensor
robing. The sensor is located in the auxiliary control box. The
alert will automatically reset.

A156 (Critical Serial EEPROM Storage Failure Error) -A
problem has been detected with the EEPROM storage on the
MBB. Try resetting the power and check the indicator lights. If
the alarm continues, the board should be replaced.
A157 (A!D Hardware Failure) -- A problem has been detected
with A/D conversion on the boards. Try resetting the power
and check the indicator lights. If the alarm continues, the board
should be replaced.

T220 (Indoor Air Quality Sensor Failure) -- The indoor air
quality sensor (Inputs---_AIR.Q---_IAQ) fails if the signal from
the 4 to 20 mA sensor is below 2 mA. If the indoor air quality
sensor fails, demand control ventilation is not possible. The
control defaults to the maximum vent position. Recovery is automatic. Reason for error is either a faulty sensor, wiring error,
or damaged input on the MBB control board.

A171 (Staged Gas Control Board Comm Failure)
-This
alarm indicates that there are communications
problems with
the staged gas heat control board, which is located in the gas
section on units equipped with staged gas heat. If this alarm
occurs, the staged gas heat will be disabled. The alarm will
automatically reset.

T221 (Outdoor Air Quality Sensor Failure) -- The indoor air
quality sensor (Inputs---_AIR.Q_OAQ)
fails if the signal from
the 4 to 20 mA sensor is below 2 mA. If the outdoor air quality
sensor fails, OAQ defaults to 400 ppm and demand control
ventilation will continue. Recovery is automatic. Reason for
error is either a faulty sensor, wiring error, or damaged input on
the CEM control board.

A172 (Controls Expansion Module Comm Failure) -- This
alarm indicates that there are communications
problems with
the controls expansion board. All functions performed by the
CEM will stop, which can include demand limit, reset, fire
control modes, and the fan stares switch. The alarm will automatically reset.

T229 (Economizer
Minimum Position Ovemde Input Failure) -- If the unit is configured to use the remote position
override for the economizer and the input Econo Min. Pos.
Ovemde (Configuration--+IAQ--+AQ.SP--+IQ.O.P)
input 4 to
20 mA reading is less than 2 mA then an alert will occur and
the default software minhnum position will be used for the
economizer. The alert will automatically reset.

A173 (ECB1 Board Communication
Failure) -- This alarm
indicates that there are colrnnunications
problems with the
economizer control board. This will result in the economizer
and the power exhaust not working and the dampers to be fully
closed. The exhaust fans will stop. The alarm will automatically reset.

T300 (Space Temperature Below Limit) -- If the space temperature
is below
the configurable
SPT Low
Alert
Limits
(occupied
[Cbnfiguration---)ALLM--+SRL.O]
for
5 minutes or unoccupied
[Configuration--+ALLM--+SRL.
U]
for 10 minutes), then an alert will be broadcast. The alert will
automatically reset.

A174 (ECB2 Board Communication
Failure) -- This alarm
indicates that there are colrnnunications
problems with the
ECB2 which controls the VAV unit indoor fan inverter speed
and hot gas bypass on CV and VAV units. Because the control
of the fan is critical to unit operation, the unit will be stopped.
The alarm will automatically reset.

98

configured
using the BP HI Alert Limit ((bnfiguration
---)ALLM--+BBH).
If
the
measured
pressure
(Pressures--cAIR.P--cBP)
is above the lhnit for 5 minutes,
then the alert will occur.

T301 (Space Temperature Above Limit) -- If the space temperature is above the configurable SPT High Alert
Lhnits (occupied [(bnfiguration--cALLM--cSRI-I.O]
for
5 minutes or unoccupied [(bnfiguration--cALLM--cSRI-I. U]
for 10 minutes), then an alert will be broadcast. The alert will
automatically reset.
T302 (Supply Temperature Below Limit) -- If the supply-air
temperature measured by the supply temperature sensor is
below the configurable SAT LO Alert Limit/Occ ((bnfiguration--cALLM--cSA.L.O) for 5 minutes or the SAT LO Alert
Lhnit/Unocc ((bnfiguration---)ALLM--cSA.L.U) for 10 minutes, then an alert will be broadcast.
T303 (Supply Temperature Above Limit) -- If the supply
temperature is above the configurable SAT HI Alert Lhnit Occ
((bnfiguration--cALLM--cSAI-I..O) for 5 minutes or the SAT
HI Alert Limit/Unocc ((bnfiguration--cALLM--cSA.I-I.. U) for
10 minutes, then an alert will be broadcast. The alert will
automatically reset.
T304 (Return Air Temperature Below Lhnit) -- If the returnair temperature measured by the RAT sensor is below the
configurable RAT LO Alert Limit/Occ ((bnfiguration--€
ALLM-cRA.L.O)
for 5 minutes or RAT HI Alert Lhnit!Occ
((bnfiguration--cALLM--cRA.L.U)
for 10 minutes, then an
alert will be broadcast.

T314 (IAQ Above Limit) -- If the unit is configured to use an
CO: sensor and the level (Inputs-+AIR.Q-+IAQ)
is above the
configurable
IAQ High
Alert Limit
(Configuration--_
ALLM-+IAQ.H)
for 5 minutes then the alert will occur. The
unit will continue to mn and the alert will automatically reset.
A404 (Fire Shutdown Emergency Mode) -- This alarm occurs
when the fire shutdown input is active (either open or closed
depending upon its configuration). If the fire shutdown input is
energized (fire shutdown is in effect), or if two fire smoke
modes are incorrectly energized at the same thne, a fire shutdown mode will occur. This is an emergency mode requiring
the complete shutdown of the unit. Recovery is automatic
when the inputs are no longer on.
This alarm is usually caused by an auxiliary device that is
trying to shut down the unit (e.g., smoke detector). The input
for Fire Shutdown is at Inputs-cFIRE-cFSD.
The switch
logic configuration for this switch input can be found at
variable (bnfiguration-cSW.LG-cFSD.L
Verify that the
configuration is set correctly, verify the wiring and auxiliary
device. This alarm resets automatically.

T305 (Return Air Temperature Above Limit) -- If the returnair temperature is below the RAT HI Alert Limit/Occ (Configuration--)ALLM-+RA.I-LO)
for 5 minutes or RAT HI
Alert Limit!Occ (Configuration -+ALLM-+RA.H.U)
for
10 minutes, then an alert will be broadcast. The alert will
automatically reset.
T308 (Return Air Relative Humidity Below Limit) -- If the
unit is configured to use a return air relative humidity sensor
through the Return Air RH Sensor ((bnfiguration
-+UNIT-+SENS-+RRH.S)
setting, and the measured level is
below the configurable RH Low Alert Limit (Configuration
--)ALLM-+R.RH.L) for 5 minutes, then the alert will occur.
The unit will continue to mn and the alert will automatically
reset.

A405 (Evacuation Emergency Mode) -- Unit has been placed
in the fire evacuation mode by means of the external colrnnand
for evacuation (Inputs" -+FIRE-+EVA().

T309 (Return Air Relative Humidity Above Limit) -- If the
unit is configured to use a return air relative humidity sensor
through the Return Air RH Sensor (Configuration
--+UNIT--+SENS--+RRI-I..S)setting, and the measured level is
above the configurable RH High Alert Limit (Configuration
--)ALLM-+R.RH.H) for 5 minutes, then the alert will occur.
Unit will continue to run and the alert will automatically reset.
T310 (Supply Duct Static Pressure Below Limit) -- If the unit
is a VAV unit with a supply duct pressure sensor and the
measured
supply
duct static pressure
(Pressures--€
AIR.P-+SP) is below the configurable SP Low Alert Limit
(Configuration--cALLM--cSRL) for 5 minutes, then the alert
will occur. The unit will continue to mn and the alert will automatically reset.
T311 (Supply Duct Static Pressure Above Limit) -- If the unit
is a VAV unit with a supply duct pressure sensor and the
measured
supply
duct static pressure
(Pressures--€
AIR.P--cSP) is above the configurable SP Low Alert Limit
((bnfiguration--cALLM--cSRH)
for 5 minutes, then the alert
will occur. The unit will continue to mn and the alert will automatically reset.
T312 (Building Static Pressure Below Limit) -- If the unit is
configured to use a VFD controlled power exhaust or a modulating power exhaust then a building static pressure lhnit can be
configured using the BP Low Alert Limit (Configuration
---)ALLM--cBRL). If the measured
pressure
(Pressures---)AIR.P--cBP) is below the limit for 5 minutes then the
alert will occur.

If the pressurization
input on the CEM is energized, a pressurization mode occurs which flags an alarm. This mode
attempts to raise the pressure of a space to prevent smoke
infiltration from another space. The space with smoke should
be in an Evacuation mode attempting to lower its pressure.
Opening the economizer, closing the return-air damper, shut!ing down power exhaust, and turning the indoor fan on will
increase pressure in the space. Recovery is automatic when the
input is no longer on.

If the evacuation input on the CEM is energized, an evacuation mode occurs which flags an alarm. This mode attempts to
lower the pressure of the space to prevent smoke from moving
into another space. This is the reverse of the Pressurization
mode. Closing the economizer, opening the return-air damper,
turning on the power exhaust, and shutting down the indoor fan
will decrease pressure in the space. Recovery is automatic
when the input is no longer on.
A406 (Pressurization Emergency Mode) -- Unit has been
placed in the fire pressurization mode by means of the External
colrunand for pressurization (Inputs'--)FIRE--+PRES).

A407 (Smoke PurEe Emergency Mode) -Unit has been
placed in the fire pressurization mode by means of the external
colrnnand for pressurization (Inputs'--+FIRE -+PURG).
If the smoke purge input on the CEM is energized, a smoke
purge mode occurs which flags an alarm. This mode attempts
to draw out smoke from the space after the emergency condition. Opening the economizer, closing the return-air damper,
and turning on both the power exhaust and indoor fan will
evacuate smoke and bring in fresh air. Recovery is automatic
when the input is no longer on.
T408 (Dirty Air Filter) -- If no dirty filter switch is installed,
the switch will read "clean filter" all the thne. Therefore the
dirty filter routine runs continuously and diagnoses the input.
Because of the different possible times it takes to generate
static pressure, this routine waits 2 minutes after the fan starts
before the dirty filter switch is monitored. If the dirty filter
switch reads "dirty filter" for 2 continuous minutes, an alert is
generated. No system action is taken. This is a reminder that it
is time to change the filters in the unit. Recovery from this alert
is through a clearing of all alarms (manual) or after the dirty
filter switch reads clean for 30 continuous seconds (automatic).

T313 (Building Static Pressure Above Limit) -- If the unit is
configured to use a VFD controlled power exhaust or a modulating power exhaust then a building static pressure lhnit can be
99

Because
theDirtyAir Filterswitchcanbeconfigured
normallyopened
or closed,
theswitchmightbeopenorclosed.
Theconfiguration
forthisswitch
inputcanbefound
atvariable

on, the software will behave as if Y1 and Y2 are both on. When
Y2 turns off, the software will behave as if Y1 and Y2 are both
Off. This alert resets automatically when Y1 is turned on.

Configuration--)SW.LG--)SFS.L
Verify that the configuration is set correctly. Verify the wiring and filter status switch.
The hose should be connected to the low side of the switch.
This alert resets automatically. The dirty filter switch is enabled
at Configuration--cUNIT-+SENS-+FL
T.S.
A409 (Supply Fan Colmnanded On Sensed Off Failure)
A409 (Supply Fan Colmnanded Off Sensed On Failure)
T409 (Supply Fan Colmnanded On. Sensed Off Failure)
T409 (Supply Fan Colmnanded
Off Sensed On Failure)
-Both the alert and the alarm refer to the same failure. The only
difference between the alarm and alert is that in the case where
the supply fan status configuration to shut down the unit is set
to YES ((bnfiguration--cUNIT--cSFS.S),
the alarm will be
generated AND the unit will be shut down. It is possible to
configure (bnfiguration--cUNITS--+SFS.M
to either a switch
or to monitor a 0.2-in. wg rise in duct pressure if the unit is
VAV with duct pressure control.

T422 (Thermostat W2 Input On without Wl On) -- This alert
occurs in Thermostat Mode when W2 is energized and Wl is
not. Verify thermostat and thermostat wiring. When W2 turns
on, the software will behave as if Wl and W2 are both on.
When W2 turns off, the software will behave as ifWl and W2
are both off. This alert resets automatically when Wl is turned

The thnings for failure for both are the same
illustrated in the following table:

on.

T423 (Thermostat Y and W Inputs On) -- This alert occurs in
Thermostat Mode when Y1 or Y2 is energized shnultaneously
with Wl or W2. Verify thermostat and thermostat wiring. The
software will enter either the cooling or heating mode depending upon which input turned on first. This alert resets automatically when Y1 and Y2 are not on simultaneously with Wl and
W2.
T424 (Thermostat G Input Off On a Cooling Call) -- This
alert occurs in Thermostat Mode when the fan is not requested
(G = ON) during cooling (Y1 or Y2 = ON). Verify thermostat
and thermostat wiring.

and are

UNIT TYPE/MODE

MINIMUM ON
TIME

CV (no gas heat)

30 seconds

1 minute

CV (gas heat)

2 minutes

4 minutes
4 minutes

T500 (Current Sensor Board Failure - A1)
T501 (Current Sensor Board Failure - A2)
T502 (Current Sensor Board Failure - B1)
T503 (Current Sensor Board FailureB2) -- Alert codes
500, 501,502,
and 503 are for compressors A1, A2, B1, and
B2 respectively. These alerts occur when the output of the current sensor (CS) is a constant high value. These alerts reset automatically. If the problem cannot be resolved and the CS
board must be replaced, the CS board can be temporarily disabled while securing a replaced board. A CS board is disabled
by setting Configuration _'OOL--c(S.A1,
(S.A2, (S.B1 or
(S.B2 to Disable.

MINIMUM OFF
TIME

VAV (IGV/no gas heat)

2 minutes

VAV (VFD/no gas heat)

1 minute

1 minute

VAV (IGV/gas heat)

4 minutes

4 minutes

VAV (VFD/gas heat)

3 minutes

4 minutes

Recovery is manual. Reason for failure may be a broken fan
belt, failed fan relay or failed supply fan status switch.
T414 (Loss of Colrnnunication
with Belflno Actuator) -- The
Belimo economizer motor is a digital controlled motor. The
(_l_[brtLink TM controls can monitor the status of the motor. If
there is a problem, this alert will occur. The control will attempt
to close the economizer dampers.

If the current sensor board malfunctions or is not properly
connected to its assigned digital input, an alert will be generated. It takes 2 to 4 seconds to log the alert. If the alert is logged,
it stays for a minhnum of 15 seconds to provide the application
a reasonable time to catch the failure. Compressors will be not
be inhibited by this failure. Recovery is automatic. Reason for
failure may be a faulty current sensor board, incorrect wiring,
or a damaged input on the MBB control board.

T414 (Belimo Actuator Direction Error) -- This alert occurs
when the economizer damper direction switch is in the wrong
position. The direction switch should be in the clockwise position and the actuator should be mounted so that the CW face of
the actuator is accessible. Correct if necessary. This alert clears
automatically.

A700 (Supply Air Temperature Sensor Failure) -- This alarm
indicates a failure of the sensor supply air temperature sensor
or the leaving air temperature sensor (if using hydronic heat).
This alarm occurs when the temperature sensor (Temperatures---)AIR. T-+SAT) is outside the range -40 to 240 F (-40 to
116 C). This alarm resets automatically. The cause of the alarm
is usually a faulty thermistor, a shorted or open thermistor
caused by a wiring erroc or a loose connection.
T701 (Staged Gas 1 Thermistor Failure)
T702 (Staged Gas 2 Thermistor Failure)
T703 (Staged Gas 3 Thermistor Failure) -- If any of the staged
gas thermistors
(Tetnperatures--+AIR.T--+S.GL1-3)
fails, an
alert will be generated and the remaining thermistors will be
averaged together (Temperatures-+AIR.
T--cS.GLS)
without
the failed thermistor. Recovery is automatic. Reason for failure
may be incorrect wiring, faulty thermistoc or a damaged input
on the staged gas control board (SCB).

T414 (Belimo Actuator Failure) -- This alert occurs when the
cognnanded damper position is changing too rapidly. This alert
resets automatically.
T414 (Belimo Actuator Jalrnned) -- This alert occurs when
the control software has detected that the damper is stuck.
Check the mechanical actuation of the dampers.
T414 (Belimo Actuator Range Error) -This alert occurs
when the economizer range of motion is less than 90 degrees.
Initiate
economizer
calibration
(Service
Test-+INDP--€
E.(;_tL) using the Service Test menu.
T420 (R-Wl Jumper Must be Installed to Run Heat in Service
Test) -- This alert occurs when a request for a heat output has
occurred yet the Wl input is not high. A jumper must be
installed between R and Wl when trying to test heat in Service
Test. The alert will clear when Service Test is exited or if
another Service Test mode is selected. Remove jumper when
done using Service Test if the unit is operating with a thermostat. The jumper should only be left in place if the unit is
operating with a space temperature sensor.

A704 (Staged Gas Leaving Air Temperature Sum Total Failure) -- If all three staged gas thermistors
(Temperatures-+AIR. T-+S.GL1-3)
fail (the sensor is outside the range
of-40 F to 240 F), staged gas will be shut down and this alarm
will be generated. Recovery is automatic. Reason for failure
may be faulty wiring, faulty thermistors, or damaged inputs on
the staged gas control board (SCB).

T421 (Thermostat Y2 Input On without Y1 On) -- This alert
occurs in Thermostat Mode when Y2 is energized and Y1 is
not. Verify thermostat and thermostat wiring. When Y2 turns

100

T705 (Limit Switch Thermistor Failure) -- A failure (the sensor is outside the range of-40 F to 240 F) of this thermistor
(Temperatures--)AIR.
T--+S.GLM) will cause an alert to occur
and a disabling of the limit switch monitoring function for the
staged gas control board (SCB). Recovery
is automatic.
Reason for failure may be due to faulty wiring, a faulty
thermistor, or a damaged input on the staged gas control board
(SCB).

MAJOR

SYSTEM

VAV BOARD (ECB2) -- The VAV board (which is the same
hardware as the ECB1) is used to control the supply fan on
VAV units. See Fig. 27. It sends a 4 to 20 mA signal to the VFD
based on a supply duct pressure sensor connected to the board.
The board also accepts a signal from another pressure sensor
that monitors building pressure and controls the operation of
the optional modulating power exhaust motors. The board will
also be used on CV units with the optional building pressure
control feature and modulating power exhaust. This board is
also used to control a digitally controlled hot gas bypass solenoid with an integral orifice for use in low load applications.
This board is located in the auxiliary control box. Input and
output assigmnents are sulmnarized in Table 117.

COMPONENTS

General

-- The 48/50A Series package rooftop units with
electric cooling and with gas heating (48A units) or electric
cooling
and electric
heating
(50A units)
contain
the
(_l_fortLink TM electronic control system that monitors all
operations of the rooftop. The control system is composed of
several components as listed below. See Fig. 15-23 for typical
control and power component schematics. Figures 24 and 25
show the layout of the control box, unit, and thermistor and
transducer locations.

Factory-Installed

STAGED GAS HEAT BOARD (SCB) -- When optional
staged gas heat is used on CV and VAV units, the SCB board is
installed and controls operation of the gas valves. See Fig. 28.
The SCB also provides additional sensors for monitoring of the
supply-air temperature. This board is located in the gas heat
section of the unit. The inputs and outputs are smrnnarized in
Table 118.

Components

CONTROL EXPANSION MODULE (CEM) -- The optional
CEM (also available as an accessory) is used to accept inputs
for additional sensors or control sequence switches, including:
• smoke control mode field switches
• VAV Supply Air Temperature Set Point reset using an external 4 to 20 mA signal
• outdoor air CO 2 sensor (for supply duct pressure reset using
an eternal 4 to 20 mA signal)
• external fan status pressure switch input (CV units)
• demand limit sequence proportional
signal or discrete
switches

MAIN BASE BOARD (MBB) -- See Fig 26 The MBB is
the center of the (_l_fortLink
control system. The MBB contains the major portion of the operating software and controls
the operation of the unit. The MBB has 22 inputs and 11 outputs. See Table 115 for the inputs and output assigmnents. The
MBB also continuously
monitors additional data from the
optional ECB1, ECB2, SCB, and CEM boards through the
LEN colmnunications
port. The MBB also interfaces with the
Carrier Comfort Network :R:system through the CCN colmnunications port. The board is located in the main control box.

The CEM board is located in the main control box. See
Fig. 29. The inputs and outputs are sulmnarized in Table 119.

ECONOMIZER
BOARD (ECB 1) -- The ECB 1 controls the
economizer actuator and the power exhaust fans. The ECB1
operates the economizer motor using a digital cognnunication
signal that also provides stares and diagnostics for the economizer motor. See Fig. 27. The ECB1 also controls the operation
of the power exhaust motors and provides up to 6 stages of digitally sequenced power exhaust either based on the economizer
motor position or the building pressure. The board has 4 inputs
and 6 outputs. Additionally, ECB1 provides an output that will
send a 4 to 20 mA signal to a field-installed VFD power exhaust accessory. Details can be found in Table 116. The ECB1
board is located in an auxiliary box located at the end of the
unit behind the filter access door. The board also contains
a second LEN port than can be used with the accessory
Navigator TM display.

INTEGRATED
GAS CONTROL
(IGC) -- One IGC is provided with each bank of gas heat exchangers (2 used on the size
020-050 units and 3 on size 051 and 060 units). The IGC
controls the direct spark ignition system and monitors the
rollout switch, limit switches, and induced-draft motor Hall
Effect switch. The IGC is equipped with an LED (lightemitting diode) for diagnostics. See Table 120.
COMPRESSOR
PROTECTION
BOARD (CS) -- This board
monitors the status of the compressor by sensing the current
flow to the compressors and then provides digital stares signal
to the MBB.

101

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102

C_3

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THE 020 027 UNITS ONLY HAVE 3 CONPRESSORS
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Schematic (48/50AJ,AK,AW, AY Units) (cont)

103

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Fig. 17 -- Typical Auxiliary Control Box Wiring Schematic (cont)

106

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i .... _ J

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t

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Fig. 18 1 Typical 2 Stage Gas Heat Wiring Schematic (Size 051 and 060 Units Shown)

107

Z TO
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PAGE

IN5
_V

IN4
5V
L_o_

BLK _<_J5

r_RED_
LATI_BLI_

 MOORONLY

_YEL__:

....................
©FCI

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BLU

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BLK

.... ......

_

_

BLF_

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_........................................
_Ii_ To
_

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PAGE
_ ::::::::::::3 NEXT

,_[_

OFM3

©_M4

6Ra/YEL
......1.......

OM5

NOIF:

1

2

IRANSFORMER WIRING FOR SUPPLY V@IAGES ARE SHOWN IN
TABLE C & D FOR 208/230
VOLT UNITS TIE TRANSFORMERS ARE
fACTORY WIR[D FOR 230 VOlT AND MUST B[ REWIRED IN THE PI[ID
_OR 208 VOLI APPLICA[IONS
ON 208/250
VOLT UNITS ¢S SENSORS SENSE CURRENT THROU6H
SMALLER GAGF WIR[ RUN IN PARAUEL TO THE MAIN POWER BLACX WIRE
fOR O]HER VOW]AGES SENSOR WILL BY IN MAIN POWER LISP

Fig. 21 -- Typical Power Schematic (48/50AJ,AK,AW, AY051 and 060 Units Shown)

111

O:M6

TABLEC
208-230/460V

TRANSFORMER I

PRIMARY VOLTAGE:

460V
230V
208V
COMM

SECONDARY VOLTAGE

CONNECT
HI
H2
H3
H4

(8LK)
(6LK)
(BLK)
(YEL)

115V

Xl

(ELK)

COMM

X2

(YEL)

575V IRANSFORMER
PRIMARY VOLTAGE:

208-230/460V
TRANSFORMER
PRIMARY VOLTAGE:
460V
230V
208V
COMM
SECONDARY VOLTAGE

CONNECT
BLK
ORN
RED
YEL

BLKo_

"
ORN_

24V

X1 (8LK)

RED_

COMM

X2 (YEL)

COMM
YELo--

HI

COMM

H4 (YEL)

575V TRANSFORMER
PRIMARY VOLTAGE:
575V

(BLK)

115V

Xl

COMM

X3 (YEL)

:

(BLK)

95V°x2

143o.................................
_ "

CONNECT
BLK

COMM

YEI

24V

XI (BLK)

COMM

X3 (YEI)

SECONDARY VOLTAGE

BL_ o

115V

40OV TRANSFORMER
PRIMARY VOLTAGE:

COMM
llSV

COMM

VARIABLE FREQUENCY INVERTER DRIVE

#FM

FREQUENCY INVERTER DRIVE

ZFM

ALT VARIABLE

4O0V TRANSFORMER
H14G _SV]SV- _X4

H2 (BLK)
H3 (BLK)
N4 (YEL)

,_o,H2_

Xl (BLK)
X2-X4
Xl-X3
X4 (YEL)

N3_

600V

COMM

--oXl

CONNECT

4OOV
38OV

SECONDARY VOLTAGE

460v

CONNECT

575V

SECONDARY VOLTAGE

]ABLE D

PRIMARY VOLIAGE:

h

YELo

COMM
--o

CONNECI
400V
380V

BLK

X3
YEL

COMM

380v"

VOLIAGE

SECONDARY

X2

24V

XI

(BLK)

X4 (YEL)

COMM

COMM
COMM
iYELG ......................
o

POWEREXIIAUSI I:::]OP
AND ACCESSORY
PECA

RED_

PL231

PL24 5

PL23-2
PL24 4
8LK->>-- BL K _>
YEL_/x YEI )>

_

P M1
BLK
YEt

CAP
ORN
I

PECB

BRN_

PL2B3

_

BLK+_

PL24B K--_> --

.............

BIK

..............
.......................
PL23 4

_LBLK

FROM
PREVIOUS
PAGE

ORN

ORN

}>>

_
_I

PL24-2

P M2

B K

B K -__

P123 6
PL?3 5
YEL_y
E

P 25-2
P M3
PL25_
....................................................................................
YL

CAP

BL K-->}>-_BL
K
P238
PL23 7

BLK

PEM4

PL254
PL25-3

YEL

F YEL@_ YEL-->>
--BLU

x

PECC

_

PL239

PL26 1

CAP
PL2?-I

_-

PEM5
_(_1',

BLK_BLK_BLK_y[
PL23
_Y I0 t _YEL_>P
26-2

I

/

PL27 2

BLK-->/x
B K ->_--BLK__iX_B
PL23-I2
P.26-4
P] 27-4

BLK__}YEL

K

PEM6

CAP

Fig. 21 -- Typical Power Schematic (48/5OAJ,AK,AW, AYO51 and 060 Units Shown) (cent)
112

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LEGEND

AND NOTES

FOR FIG. 15-25

LEGEND
A
AUX
B
BP
C
CAP
CB
CCB
CCH
CCN
CEM
COMP
CR
CS
CSB
DP
DPT
DS
ECB-1
ECB-2
EDT
FlOP
FS
FU
GND
HC
HGBP
HIR
HPS
HR
HS
IAQ
IDF
IDM
IFC
IFCB
IFM
IGC
IP
LAT
LEN
LS
MBB
MGV
NEC
OARH
OAT
OFC
OFM
PEC
PEM

----------------------------------------------------

Circuit A
Auxiliary Contact
Circuit B
Building Pressure Transducer
Contactor, Compressor
Capacitor
Circuit Breaker
Control Circuit Breaker
Crankcase Heater
Carrier Comfort Network ®
Controls Expansion Module
Compressor Motor
Control Relay
Compressor Safety
Compressor Current Sensing Board
Duct Pressure Sensor
Discharge Pressure Transducer
Disconnect Switch
Economizer Control Board
Building and Supplier Air Control Board
Evaporator Discharge Air Temperature
Factory-Installed Option
Flame Sensor
Fuse
Ground
Heat Contactor
Hot Gas Bypass
Heat Interlock Relay
High Pressure Switch
Heat Relay
Hall Effect Induced Draft Motor Switch
Indoor Air Quality
Induced Draft Fan
Induced Draft Motor
Indoor Fan Contactor
Indoor Fan Circuit Breaker
Indoor Fan Motor
Integrated Gas Control Board
Internal Compressor Protector
Staged Gas Temperature Sensor
Local Equipment Network
Limit Switch
Main Base Board
Main Gas Valve
National Electrical Code
Outdoor Air Relative Humidity
Outdoor Air Temperature Sensor
Outdoor Fan Contactor
Outdoor Fan Motor
Power Exhaust Contactor
Power Exhaust Motor

PL
RARH
RAT
RLA
RLY
RS
SCB
SCT
SDU
SST
T-55
T-56
TB
TRAN
VAV
VFD

----------------

Plug
Return Air Relative Humidity
Return Air Temperature Sensor
Rated Load Amps
Relay
Rollout Switch
Staged Gas Heat Control Board
Saturated Condensing Temperature Sensor
Scrolling Marquee Display
Saturated Suction Temperature Sensor
Room Temperature Sensor
Room Temperature Sensor with Setpoint
Terminal Block
Transformer
Variable Air Volume
Variable Frequency Drive
Terminal Block

©

Terminal (Unmarked)

45_

Terminal (Marked)

0

Splice
Factory Wiring
Field Wiring
To indicate common potential only.
Not to represent wiring.
To Indicate FlOP or Accessory

THERMOSTAT
BM
C
CM
CS
G
IFO
L1
R
RT
SS
Wl
W2
X
Y1
Y2

NOTES:
1. Factory wiring is in accordance with the National Electrical
Codes. Any field modifications or additions must be in compliance with all applicable codes.
2. Use 75 ° C min wire for field power supply, use copper wires for
all units.
3. All circuit breakers "Must Trip Amps" are equal to or less than
156% RLA.

----------------

MARKINGS

Blower Motor
Common
Inducer Motor
Centrifugal Switch
Fan
Indoor Fan On
Line 1
Thermostat Power
Power Supply
Speed Sensor
Thermostat Heat Stage 1
Thermostat Heat Stage 2
Alarm Output
Thermostat Cooling Stage 1
Thermostat Cooling Stage 2

Compressor and fan motors are thermally protected -- three
phase motors protected against primary single phase conditions.
5. Red jumper wire must be added between R, Wl, and W2 for
space temperature sensor and all VAV units with heat and temporarily during Service Test mode when the heaters need to
operate.
4,

ll7

Table 115 -- Main Control Board (MBB) Inputs and Outputs
POINT
NAME
INPUTS

POINT DESCRIPTION

I/ONAME
POINT

PLUG
AND PIN
REFERENCE

GASFAN
FSD
G
W2
Wl
Y2
Y1
CSBA1
CSBA2
CSB B1
CSB B2

YAC Indoor Fan relay (fan request from YAC)
Fire Shutdown switch input
Thermostat 'G' input
Thermostat 'W2' input
Thermostat 'WI' input
Thermostat 'Y2' input
Thermostat 'YI' input
Compressor A1 current sensor
Compressor A2 current sensor
Compressor B1 current sensor
Compressor B2 current sensor

DI1
DI2
DI3
DI4
DI5
DI6
DI7
DIG1
DIG2
DIG3
DIG4

36, 3-4
J6, 5-6
J7, 1-2
J7, 3-4
J7, 5-6
J7, 7-8
J7, 9-10
J9, 10-12
J9, 7-9
J9, 4-6
J9, 1-3

10=5v,
7=5v,
4=5v,
1=5v,

DP NSCTA

Circuit
A saturated
condensing
pressure/temp

AN1

J8, 21-23

21=5v,
22=Vin, 21-22)
23=GND
(thermistor

(0-5vdc, thermistor,

ohms)

DP B/SCTB

Circuit B saturated
condensing pressure/temp

AN2

J8, 24-26

24=5v, 25=Vin, 26=GND
(thermistor 24-25)

(0-5vdc, thermistor,

ohms)

SP NSSTA

Circuit A saturated
suction pressure/temp

AN3

J8, 15-17

15=5v, 16=Vin, 17=GND
(thermistor 15-16)

(0-5vdc, thermistor,

ohms)

SP B/SSTB

Circuit
saturated
suction Bpressure/temp

AN4

J8, 18-20

18=5v,
19=Vin, 18-20)
20=GND
(thermistor

(0-5vdc, thermistor,

ohms)

AN5
AN6
AN7
AN8
AN9
ANIO
AN11

J8, 9-10
J8, 11-12
J8, 13-14
J8, 1-2
J8, 3-4
J8, 5-6
J8, 7-8

9
11
13
1
3
5
7

(thermistor,
(thermistor,
(thermistor,
(thermistor,
(thermistor,
(thermistor,
(thermistor,

RLY 1
RLY 2
RLY 3
RLY 4
RLY 5
RLY 6
RLY7
RLY 8
RLY 9
RLY 10
RLY 11

J10, 20-21
J10, 22-23
J10, 24-25
J10, 26-27
J10, 10-11
J10, 12-13
J10, 14-16
J10, 17-19
JlO, 4-6
JlO, 7-9
JlO, 1-3

RAT
SA TEMP
OAT
SPT
SPTO
IAQ/IAQMINOV
FLTS
OUTPUTS
CMPB2
CMPB1
CMPA2
CMPA1
CONDFANB
CONDFANA
HS2
HS1
HIR
SF
ALRM

Return air temperature
Supply air temperature
Outdoor air temperature
Space temperature (T55/56)
Space temperature offset (T56)
IAQ analog input
Filter Status
Compressor B2
Compressor B1
Compressor A2
Compressor A1
Condenser fan B
Condenser fan A
Heat stage 2
Heat stage 1
Heat interlock relay
Supply fan
Alarm output relay

SIGNAL PIN(S)

20
22
24
26
10
12

PORT STATE

4
6
2
4
6
8
10
11=Vin, 12=GND
8=Vin, 9=GND
5=Vin, 6 =GND
2=Vin, 3=GND

0 = 24vac,
0 = 24vac,
0 = 24vac,
0 = 24vac,
0 = 24vac,
0 = 24vac,
0 = 24vac,
0= 5vdc,
0 = 5vdc,
0 = 5vdc,
0 = 5vdc,

= RLY1A (=RLY2A), 21 = RLY1B
= RLY2A (=RLY1A), 23 = RLY2B
= RLY3A (=RLY4A), 25 = RLY3B
= RLY4A (=RLY3A), 27 = RLY4B
= RLY5A (=RLY6A), 11 = RLY5B
= RLY6A (=RLY5A), 13 = RLY6B
14 = 15 = RLY7A, 16 = RLY7B
17 = 18 = RLY8A, 19 = RLY8B
4 = 5 = RLY9A, 6 = RLY9B
7 = 8 = RLY10A, 9 = RLY10B
1 = 2 = RLY11A, 3 = RLY11B

__

YELLOW LED CCN (CARRIER
COMFORT

GREEN LED_PMENT

CEPL130346-01

HK 50A4.)29

NETWORK)

CE BO 430346

__Z_INSTANCE

_/

J7

Fig. 26 -- Main Base Board (MBB)
118

JUMPER

NETWORK)
(SET

ohms)
ohms)
ohms)
ohms)
ohms)
ohms)
ohms)

1 = Closes RLY1A/RLY1B
1 = Closes RLY2A/RLY2B
1 = Closes RLY3A/RLY3B
1 = Closes RLY4A/RLY4B
1 = Closes RLY5A/RLY5B
1 = Closes RLY6A/RLY6B
1 = Closes RLY7A/RLY7B
1 = Closes RLY8A/RLY8B
1 = Closes RLY9A/RLY9B
1 = Closes RLYIOA/RLY10B
1 = Closes RLY11A/RLY11B

YAC -- Gas Heat Unit
RED LED - STATUS

1= 0vac
1= 0vac
1= 0vac
1= 0vac
1= 0vac
1= 0vac
1= 0vac
1 =Ovdc
1 = Ovdc
1 = Ovdc
1 = Ovdc

TO 1)

Table 116 -- Economizer Control Board (ECB1) Inputs and Outputs
POINT
NAME

POINT DESCRIPTION

I/O POINT
NAME

PLUG AND PIN
REFERENCE

DI1

J4, 1-2

2

24VAC =I,0VAC

=0

DI2

J4, 3-4

4

24VAC =I,0VAC

=0

SIGNAL

PORT STATE

PIN(S)

INPUTS
RMTIN

Remote occupancy

ECONENBL,
ECOORIDE
RARH
OARH

Economizer

enable

Return air relative humidity

AN1

J5, 1-3

1=24VDC, 2=0-20mA in, 3=GND

0-20mA

Outdoor air relative humidity

AN2

J5, 4-6

4=24VDC, 5=0-20mA in, 6=GND

0-20mA

AO1

J9, 1-2

OUTPUTS
ECBI_AO1

2=GND

0-20mA OUT

Data, 2=24VAC, 3=GND

Belimo PP/MP Protocol

l=0-20mA,

ECB1, analog output 1
Economizer actuator
(digital control)

PP/MP

J7, 1-3

PE_A

Power Exhaust stage A

RLY1

J8, 1-3

1 = 2 = RLY1A, 3 = RLY1B

1 = Closes RLY1A/RLY1B

PE_B

Power Exhaust stage B
Power Exhaust stage C
Economizer Power

RLY2

J8, 4-6

4 =5 = RLY2A, 6 = RLY2B

1 = Closes RLY2A/RLY2B

RLY3

J8, 7-9

7 = 8 = RLY3A, 9 = RLY3B

1 = Closes RLY3A/RLY3B

RLY6

J8, 16-18

16 = 17 = RLY6A, 18 = RLY6B

1 = Closes RLY6A/RLY6B

ECONOCMD

PE_C
ECON_PWR

I=PP/MP

RED LED
STATUS

GREEN LED-LEN
(LOCAL EQUIPMENT

NETWORK)

cEn43o*sm-o**
HK50AA034CEPL130493
SS-OtD

[)[)

E]

J.

[][)[3[)

%

O.

IC)
I--I,,o

,,

[3
-,.

,,

Jl

V

'

..

÷

-2°; ,,.g

"1

,,18|

ADDRESS DIP SWITCHES
RCB - 1-4 ON
ECB - 1-OFF,2-4 ON

Fig. 27 -- Economizer Control Board (ECB1) and VAV Control Board (ECB2)

119

,]8£

€

Table 117 -- VAV Control Board (ECB2) Inputs and Outputs
POINT
NAME

POINT DESCRIPTION

I/O POINT
NAME

PLUG AND PIN
REFERENCE

DI1

J4, 1-2

2

24VAC =I,0VAC

=0

DI2

J4, 3-4

4

24VAC =I,0VAC
0-20mA

=0

SIGNAL

PIN(S)

PORT STATE

INPUTS

BP

Building static pressure

AN1

J5, 1-3

1=24VDC, 2=0-20mA

in, 3=GND

SP

Supply Duct static pressure

AN2

J5, 4-6

4=24VDC, 5=0-20mA

in, 6=GND

0-20mA

OUTPUTS
SFAN_VFD

MLV

Supply Fan Inverter speed

Minimum load valve

AO1

J9, 1-2

PP/MP

J7, 1-3

1=0-20mA, 2=GND
I=PP/MP

Data, 2=24VAC, 3=GND

RLY1

J8, 1-3

1 = 2 = RLY1A, 3 = RLY1B

1 = Closes RLY1A/RLY1B

RLY2

J8, 4-6

4 =5 = RLY2A, 6 = RLY2B

1 = Closes RLY2A/RLY2B

RLY3

J8, 7-9

7 = 8 = RLY3A, 9 = RLY3B

1 = Closes RLY3A/RLY3B

RLY6

J8, 16-18

16 = 17 = RLY6A, 18 = RLY6B

1 = Closes RLY6A/RLY6B

ADDRESS DIP
SWITCHES ALL ON

RED LEDSTATUS

GREEN LEDLEN (LOCAL EQUIPMENT

\

_CEBD_27

J6

HK50AA032

I
7 I

4

0-20mA OUT
Belimo PP/MP Protocol

1

XDCR/THERM

Fig. 28 -- Staged Gas Heat Control Board (SOB)

120

NETWORK)

Table 118 -- Staged Gas Control Board (SCB) Inputs and Outputs
POINT
NAME

POINT DESCRIPTION

I/O POINT
NAME

PLUG AND PIN
REFERENCE

AN1

J5, 1-3

1=5v, 2=Vin, 3=GND (thermistor 1-2)

(O-5VDC, thermistor, ohms)

AN2

J5, 4-6

4=5v, 5=Vin, 6=GND (thermistor 4-5)

(O-5VDC, thermistor, ohms)

7=5v, 8=Vin, 9=GND (thermistor 7-8)

(O-5VDC, thermistor, ohms)

SIGNAL

PORT STATE

PIN(S)

INPUTS

LAT1SGAS

Leaving air temperature

1

AN3

J5, 7-9

LAT2SGAS

Leaving air temperature

2

AN4

J5, 10-12

10=5v, 1l=Vin,

LAT3SGAS

Leaving air temperature

3

AN5

J5, 13-15

AN6

J6, 1-3

13=5v, 14=Vin, 15=GND (thermistor 13-14)
1=5v, 2=Vin, 3=GND (thermistor 1-2)

(O-5VDC, thermistor, ohms)
(O-5VDC, thermistor, ohms)

AN7

J6, 4-6

4=5v, 5=Vin, 6=GND (thermistor 4-5)

(O-5VDC, thermistor, ohms)

AN8

J6, 7-9

(O-5VDC, thermistor, ohms)

AN9

J7, 1-2

7=5v, 8=Vin, 9=GND (thermistor 7-8)
1

AN10

J7, 3-4

3

(thermistor, ohms)

A01

J8, 1-2

1=O-20mA, 2=GND

0-20mA OUT

A02

J8, 3-4

3=O-20mA, 4=GND

12=GND (thermistor

10-11 ) (O-5VDC, thermistor, ohms)

(thermistor, ohms)

OUTPUTS
0-20mA OUT

HS3

Heat Stage 3

RLY1

J9, 1-3

1 =2=

RLY1A, 3 = RLY1B

1 = Closes RLY1A/RLY1B

HS4

Heat Stage 4

RLY2

J9, 4-6

4 = 5 = RLY2A, 6 = RLY2B

1 = Closes RLY2A/RLY2B

HS5

Heat Stage 5

RLY3

J9, 7-9

7 = 8 = RLY3A, 9 = RLY3B

1 = Closes RLY3A/RLY3B

HS6

Heat Stage 6

RLY4

J9, 10-12

10 = 11= RLY4A, 12 = RLY4B

1 = Closes RLY4A/RLY4B

RLY5

J9, 13-15

13 = 14 = RLY5A, 15 = RLY5B

1 = Closes RLY5A/RLY5B

.€..==

O
!

rq[]

o
#_

LEN

.€..==

STATUS
LIJ

t-

J7

J6

\
RED LED-STATUS

GREEN LEDLEN (LOCAL EQUIPMENT

ADDRESS

NETWORK)

Fig. 29 -- Controls Expansion Board (CEM)

121

DIP SWITCH (ALL ON)

U

Table 119 -- Controls Expansion Board (CEM) Inputs
POINT
NAME

I/O POINT
NAME

PLUG AND PIN
REFERENCE

Supply Fan Status switch

DI 1

37, 1-2

2

0 = 24vac, 1= 0vac

Demand Limit - SWl
Demand Limit - SW2/
Dehumidification
Switch Input

DI 2

J7, 3-4

4

0 = 24vac, 1= 0vac

DI 3

J7, 5-6

6

0 = 24vac, 1= 0vac

PRES

Pressurization

DI 4

J7, 7-8

8

0 = 24vac, 1= 0vac

EVAC

Evacuation

DI 5

J7, 9-10

10

0 = 24vac, 1= 0vac

PURG

Purge

DI 6

J7, 11-12

12

0 = 24vac, 1= 0vac

IAQIN

Indoor Air Quality Switch

DI 7

J7, 13-14

14

0 = 24vac, 1= 0vac

AN7

J6, 1-3

2 (1 = loop power)

(O-20mA input)

POINT DESCRIPTION

SIGNAL

PIN(S)

PORT STATE

INPUTS
SFS
DMD SWl
DMD SW2/
DHD]SClN

DMDLMTMA

4-20mA Demand Limit

AN8

J6, 4-6

5 (4 = loop power)

(O-20mA input)

EDTRESMA

4-20mA Evaporator

AN9

J6, 7-9

8 (7 = loop power)

(O-20mA input)

Outside Air CO2 Sensor

AN10

J6, 10-12

11 (10 = loop power)

(O-20mA input)

SP Reset milliamps

AN10

J6, 10-12

11 (10 = loop power)

(O-20mA input)

OAQ
SPRESET

Discharge SP Reset

CEM 10K1/
CEM 4201

CEMAN1 lOktemp J5,1-2/
CEM AN1 4-20 ma J5,1-2

AN1

J5, 1-2

1

(thermistor,

ohms)

CEM 10K2/
CEM 4202

CEM AN2 1Ok temp J5,3-4/
CEM AN2 4-20 ma J5,3-4

AN2

J5, 3-4

3

(thermistor,

ohms)

CEM 10K3/
CEM 4203

CEM AN3 1Ok temp J5,5-6/
CEM AN3 4-20 ma J5,5-6

AN3

J5, 5-6

5

(thermistor,

ohms)

CEM 10K4/
CEM 4204

CEM AN4 1Ok temp J5,7-8/
CEM AN4 4-20 ma J5,7-8

AN4

J5, 7-8

7

(thermistor,

ohms)

AN5

J5, 9-10

9

(thermistor,

ohms)

AN6

J5, 11-12

11

(thermistor,

ohms)

SCROLLING
MARQUEEThis device is the keypad interface used to access the control information,
read sensor
values, and test the unit. The scrolling marquee display is a
4-key, 4-character,
16-segment LED display as well as an
Alarm Stares LED. See Fig. 30. The display is easy to operate
using 4 buttons and a group of 11 LEDs that indicate the
following menu structures:
• Run Status
• Service Test
• Temperatures
• Pressures
• Set points
• Inputs
• Outputs
• Configuration
• Timeclock
• Operating Modes
• Alarms

SUPPLY FAN -- The size 020 to 050 units are equipped with
two 15 x ll-in, forward-curved
fans. The size 051 and 060
units have three 15 x 11-in. fans. They are on a colranon shaft
and are driven by single belt drive 3-phase motor. The fan is
controlled directly by the (_n_folTLink TM controls.
VARIABLE FREQUENCY
DRIVE (VFD) -- On variable
volume units, the supply fan speed is controlled by a 3-phase
VFD. The VFD is located in the fan section behind a removable panel as shown in Fig. 24 and 25. The VFD speed is
controlled directly by the (_,fortLink
controls through a 4 to
20 mA signal based on a supply duct pressure sensor. The
inverter has a display, which can be used for service diagnostics, but setup of the supply duct pressure set point and control
loop factors is done through the scrolling marquee display. The
VFD is powered during normal operation to prevent condensation from forming on the boards during the off mode and is
stopped by driving the speed to 0 (by sending a 2 mA signal to
the VFD).
The A Series units use ABB ACH550 VFDs. The interface
wiring for the VFDs is shown in Fig. 31. Terminal designations
are shown in Table 121.

Through the scrolling marquee the user can access all the
inputs and outputs to check on their values and status. Because
the unit is equipped with suction pressure transducers and
discharge saturation temperature sensors it can also display
pressures typically obtained from gages. The control includes a
full alarm history, which can be accessed from the display. In
addition, through the scrolling marquee the user can access a
built-in test routine that can be used at start-up colmnission and
to diagnose operational problems with the unit. The scrolling
marquee is located in the main control box and is standard on
all units.

O

Table 120 -- IGC Board Inputs and Outputs
POINT NAME

RT
W
G

]

Run Status

POINT

DESCRIPTION

PIN NO.
] CONNECTOR

INPUTS
24 Volt Power Supply
Heat Demand

R1 ,C
2

Fan

3

LS

Limit Switch

RS

Rollout

SS

Hall Effect Sensor

CS
FS

Centrifugal Switch
Flame Sense

7,8

Switch

5,6
1,2,3
(Not Used)

9,10
FS

OUTPUTS
@AEarm

O

Status

Configuration
qime

Clock

CM

Induced

IFO

Indoor

R

@Operath_gModes
@/Uarms

SPARK
LED

Fig. 30-

Scrolling Marquee

122

Draft Motor

CM

Fan

24 Volt Power Output
Sparker
D sp ay LED

IFO
(Not Used)

R

TERMINAL

Xl
",t--

c_

©

co

_

T

04

m

"I,

O

£3

tm

D

C3

TYZ []

|

__<:::--->
Jr

m

_nal

from

Comfort

Link Control

Fig. 31 -- VFD Wiring

accurate control of the motors as well as feedback information
and diagnostics information. The control has a self-calibration
routine that allows the motor position to be configured at initial
unit start-up. The motor is located on the economizer and can
be reached through the filter access door.
THERMISTORS
AND PRESSURE
TRANSDUCERS
-The 48/50AJ,AK,AW, AY units are equipped with thermistors
and pressure transducers.
These units have two thermistors
connected to the condenser coil and two pressure transducers
that are connected to the low side of the system.

Table 121 -- VFD Terminal Designations
TERMINAL
Ul
V1
W1
U2
V2
W2

FUNCTION

Three-Phase

Main Circuit Input Power Supply

Three-Phase AC Output to Motor, 0 V to
Maximum Input Voltage Level

X1-11 (GND)
X1-12 (COMMON)

Factory-supplied

X1-10
X1-13
X1-10
X1-16

Run (factory-supplied jumper)
Start Enable 1 (factory-supplied jumper). When
opened the drive goes to emergency stop,

(24 VDC)
(DI-1)
(24 VDC)
(DI-4)

X1-2 (AI-1)
X1-3 (AGND)

jumper

The 48/50A2,A3,A4,A5
units are equipped with four pressure transducers. These units have two pressure transducers
connected to the low side of the system and two pressure transducers connected to the high side of the system.

Factory wired for 4 to 20 mA remote input

By using either temperature
sensors or transducers,
the
(_mfortLink
controller displays the high and low side pressures and saturation temperatures. A normal gage set is not
required.

POWER EXHAUSTThe units can be equipped with an
optional power exhaust system. The power exhaust fans are
forward-curved
fans with direct-drive motors. The motors are
controlled directly by the (_l_fortLink TM controls through the
ECB1 board. On the 48/50A020-050
units there are 4 fans. On
the 48/50A051 and 060 units there are 6 fans. The fan sequences are controlled to provide 4 stages on the 48/50A020-050
units and 6 stages on the 48/50A051 and 060 units. There are
two control methods. For CV applications the fans can be
configured
for 2 stages based on adjustable
economizer
damper positions. For VAV applications and CV units with the
building pressure control option, the fans are sequenced to
maintain a building pressure set point based on a building
pressure transducer.
ECONOMIZER
MOTOR -- The economizer outside air and
return air dampers are gear-driven dampers without linkage. A
digitally controlled economizer motor controls their position.
The motor position is controlled by the ECB1 board by means
of a digital two-way colr_nunication
signal. This allows for

SMOKE DETECTOR
-- The units can be equipped with an
optional smoke detector located in the return air. The detector
is wired to the (_mfortLink
controls and, if activated, will stop
the unit by means of a special fire mode. The smoke detector
can also be wired to an external alarm system through TB5
terminals 10 and 11. The sensor is located in the return air section behind the filter access door.
FILTER STATUS SWITCHThe units can be equipped
with an optional filter status switch. The switch measures the
pressure drop across the filters and closes when an adjustable
pressure set point is exceeded. The sensor is located in the
return air section behind the filter access door.

RETURN AIR CO 2 SENSOR -- The unit can also be
equipped with a return air IAQ CO2 sensor that is used for the
demand control ventilation. The sensor is located in the return
air section and can be accessed from the filter access door.

123

BOARDADDRESSES
-- Eachboardin thesystem
hasan
address.
TheMBBhasadefault
address
of1butit does
have
aninstance
jumperthatshould
besetto1asshown
inFig.26.
Fortheotherboards
inthesystem
thereisa4-dipswitch
headeroneach
board
thatshould
besetasshown
below.
BOARD

SW1

SW2

SW3

SW4

ECB1

0

0

0

0

ECB2

1

0

0

0

SCB

0

0

0

0

CEM

0

0

0

0

0 = On;
FIELD
nection
Fig. 32

•
•
•

of an enthalpy/dewpoint

The units are equipped as standard with an outside air and
return air dry bulb sensor which supports the dry bulb
changeover methods. If the other methods are to be used, then a
field-installed humidity sensor must be installed for outdoor air
enthalpy and customer curve control and two humidity sensors
must be installed for differential enthalpy. Installation holes are
pre-drilled and wire harnesses are installed in every unit for
connection of the humidity sensors. The (_mfortLink
controls
convert the measured humidity into enthalpy, dewpoint, and
the humidity changeover curves.

1 = Off
CONNECTION
TERMINAL
STRIPS -- Field conterminal strips are located in the main control box. See
and Table 122.

MOTORMASTER
R:V CONTROL -- For operation below
32 F when an economizer is not used, the units can be equipped
with an accessory Motormaster V control, which controls the
speed of the stage 1 condenser fans. The Motormaster V control
is a 3-phase inverter that controls the speed of the fans based on
a pressure transducer connected to the liquid line. On 48/
50A020-035 units, one fan will be controlled. On 48/50A036060 units, two fans will be controlled. For units equipped with
an economizer, there should not be a need for this control because the economizer can provide free cooling using outside air,
which will be significantly lower in operating cost.

Accessory Control Components

E In addition to
the factory-installed
options, the units can also be equipped
with several field-installed accessories that expand the control
features of the unit. The following hardware components can
be used as accessories.
ROOM THERMOSTATS
(48/50AJ,AW,
A2,A4 UNITS
ONLY)The (_mfortLink TM controls support a conventional electro-mechanical
or electronic thermostat that uses the
Y1, Y2, Wl, W2, and G signals. The control also supports an
additional input for an occupied/unoccupied
command that is
available on some new thermostats. The (_mfortLink
controls
can be configured to run with multiple stages of capacity which
allows up to 6 stages of capacity. Although the unit can be configured for normal 2-stage control, it is recommended that the
multi-stage control be used. The room thermostat is connected
to TB4.

The accessory Motormaster V speed control is a completely
self-contained
control and is not controlled by the unit's
(_mfortLink
controller. On 48/50A051 and 060 units with 6
fan motors, the Motormaster
control configuration
(M..M..)
must be set to YES. See page 39.
ACCESSORY
NAVIGATOR TM DISPLAY -- The accessory handheld Navigator display can be used with the 48/50A series units. See Fig. 34. The Navigator display operates the same
way as the scrolling marquee device. The ECB1 and ECB2
boards contain a second LEN port (J3 connection) than can be
used with the handheld Navigator display.
CONTROL MODULE COMMUNICATIONS

SPACE SENSORThe (_mfortLink
controls support the
use of space temperature sensors. The T55 and T56 sensors
and CCN communicating
T58 room sensor can be used. The
T55 and T56 sensors are connected to TB5 terminal 3, 4, and 5.
The T58 sensor is connected to the CCN connections on TB3.
When a T55, T56, or T58 sensor is used, the user must install
the red jumpers from R to Wl, and W2 on TB4 for the heat
function to work correctly.

Red LED -- Proper operation of the control boards can be
visually checked by looking at the red status LEDs as shown on
Fig. 26-29. When operating correctly, the red stares LEDs
should blink in unison at a rate of once every 2 seconds. If the
red LEDs are not blinking in unison, verify that correct power is
being supplied to all modules. Also, be sure that the main base
board is supplied with the current software. If necessary, reload
current software. If the problem still persists, replace the MBB.
A board LED that is lit continuously or blinking at a rate of once
per second or faster indicates that the board should be replaced.

SPACE CO2 SENSORS -- The (_mfortLink
controls also
support a CO 2 IAQ sensor that can be located in the space for
use in demand ventilation. The sensor must be a 4 to 20 mA
sensor and should be connected to TB5 terminal 6 and 7. See
Fig. 33 for sensor wiring.
ECONOMIZER
HUMIDITY
CHANGEOVER
SENSORS--The
(_mfortLink
controls
support
5 different
changeover schemes for the economizer. These are:
•
•

outdoor air enthalpy curves
differential enthalpy
custom curves (a combination
curve and a dry bulb curve).

outdoor air dry bulb
differential dry bulb
+
LEN
R

TB4

C

1

GRD

F1 F1 Q@@@

TB3

Y1

CCN
Y2

2

3

5

7

9

11

13

15

@@@@@@@@

CCN
W1

W2

G

TB5
C

@@@@@@@@

X

@@@@@@@@
1

3

4

5

6

7

8

2

4

6

8

10

12

14

16

1

3

5

7

9

11

13

15

@@@@@@@@
TB6

@@@@@@@@
2

4

6

8

10

12

Fig. 32 -- Field Connection Terminal Strips (Main Control Box)
124

14

16

Table 122 -- Field Connection Terminal Strips
TERMINAL
BOARD

I

TB-1 - POWER

TERMINAL
NO.

CONNECTION
11
12

400-3-50
400-3-50

13
L3 power supply
(in Main Control
Box)

208-230/460/575/380/-3-60,

400-3-50

TB3

TB-4 - THEROMSTAT

TB-6 - FIELD

5 VDC, logic
5 VDC, logic

3
4

LEN 24 VAC

5 VDC, logic
24 VAC

5
6

CCN +
CCN c

5 VDC, logic
5 VDC, logic

7
8

CCN Grd

5 VDC, logic
ground

CONNECTIONS
(HY84HA090)
1
Thermostat
R

TB-7 - ELECTRIC
TB7

(in Main Control

Box)
24VAC

2
3

Thermostat
Thermostat

Y1
Y2

24VAC
24VAC

4
5

Thermostat
Thermostat

W1
W2

24VAC
24VAC

6
7

Thermostat
Thermostat

G
C

24VAC
24VAC

Thermostat

X

(HY84HA101)

24VAC

(in Main Control

Box)

1
2
3
4

VAV Heater Interlock
VAV Heater Interlock
T56 Sensor
T56/T58 Ground

5
6

T58 Setpoint
Indoor Air IAQ Remote

Sensor/Remote

Pot/Remote

4-20 mA

7
8

Indoor Air IAQ Remote Sensor/Remote
Smoke Detector Remote Alarm

Pot/Remote

4-20 mA

Relay, Ground
Relay, 24 VAC

Remote

external
external
5VDC
5VDC

Alarm

24 VDC relay
24 VDC relay

5VDC
4-20 mA, ext. powered
4-20 mA, ext. powered
external contacts

9
10

Smoke Detector
Fire Shutdown

11
12

Fire Shutdown
Fire Control Common

external
external

contact
contact

13
14

Fire Pressurization
Fire Evacuation

external
external

contact
contact

15
16

Fire Smoke
Not Used

external

contact

external
external

24 VAC contact
24 VAC contact

external
external
external

24 VAC contact
24 VAC contact
24 VAC contact

CONNECTIONS
1
2

TB6

Box)

LEN +
LEN C

CONNECTIONS

TB5

I Neutral Power
(HY84HA096)
(in Main Control

1
2

8
TB-5 - FIELD

TYPE

Box)
208-230/460/575/380/-3-60,
208-230/460/575/380/-3-60,

TB2
I
1
TB-3 - CCN COMMUNICATIONS

TB4

DESCRIPTION
(in Main Control

L1 power supply
L2 power supply

TB1
TB-2 - GROUND

I
OR DISCONNECT

Box)
Enable

3
4
5

Remote Occupied Contact
Demand Limit Contacts Common
Demand Limit Switch 1

6
7

Demand
Demand

8
9

Demand Limit 4-20 mA
Remote Supply Air Setpoint

Limit Switch 2/Dehumidify
Limit 4-20 mA

Supply Air Setpoint
Air IAQ 4-20 mA

w/res or 0-5 VDC

external contacts
24 VAC external

Purge

(HY84HA101)
(in Main Control
Remote Occupied/Economizer
Remote Economizer
Contact

w/res or 0-5 VDC

24 VAC

Switch

Input

4-20 mA
4-20 mA

external 24 VAC contact
externally
)owered 4-20 mA
externally
externally

)owered
)owered

4-20 mA
4-20 mA

externally
externally

)owered
)owered

4-20 mA
4-20 mA
4-20 mA

10
11

Remote
Outdoor

12
13

Outdoor Air IAQ 4-20 mA
IAQ Remote Switch

externally
)owered
external contact

14

IAQ Remote

external

15

Supply

Switch

contact

Fan Status Switch

16
Supply Fan Status Switch
HEAT POWER BLOCK (in Electric Heat section)
1
2

L1 Power Supply
L2 Power Supply

208-230/460/575/380/-3-60,
208-230/460/575/380/-3-60,

400-3-50
400-3-50

3

L3 Power Supply

208-230/460/575/380/-3-60,

400-3-50

125

UNIT CONTROL

BOX

TB4

111213141516171
I
I

TB5

11121 IiI 16171
iE
E

_
I

1
J

i

E
_4
!I I.....
III

i

I I

1

2

3

IEk

I
I

r
1 _

-- CO

L _-----7-

I®@ol

-

-_

....................................

OVERRIDE

Fig. 33

::
_

J5

2'

2

J6

and Space Temperature Sensor Wiring (33ZCT55CO2 and 33ZCT56CO2)

Green LED -- The boards also have a green LED, which is
the indicator of the operation of the LEN colrnnunications,
which is used for colmnunications between the boards. On the
MBB board the Local Equipment Network (LEN) LED should
always be blinking whenever power is on. All other boards
have a LEN LED that will blink whenever power is on and
there is colmnunication occumng. IfLEN LED is not blinking,
check LEN connections for potential colrnnunication errors (J3
and J4 connectors). A 3-wire sensor bus accomplishes colrnnunication between modules. These 3 wires run in parallel from
module to module.

It is important when connecting to a CCN colmnunication
bus that a color-coding scheme be used for the entire network
to simplify the installation. It is recolrnnended that red be used
for the signal positive, black for the signal negative and white
for the signal ground. Use a similar scheme for cables containing different colored wires.
At each system element, the shields of its colrnnunication
bus cables must be tied together. If the colrnnunication bus is entirely within one building, the resulting continuous shield must
be connected to a ground at one point only. If the colrnnunication bus cable exits from one building and enters another, the
shields must be connected to grounds at the lightning suppressor
in each building where the cable enters or exits the building (one
point per building only). To connect the unit to the network:

Yellow LED -- The MBB has one yellow LED. The Carrier
Comfort Network R_(CCN) LED will blink during times of
network colrnnunication. The other boards do not have a CCN
colrnnunications port.
CARRIER
COMFORT
NETWORK
INTERFACE
-- The
48/50A Series units can be connected to the CCN interface if
desired. The colrnnunication bus wiring is a shielded, 3-conductor cable with drain wire and is field supplied and installed. See
the Installation Instructions for wiring information. The system
elements are connected to the colmnunication
bus in a daisy
chain arrangement.
The positive pin of each system element
colmnunication connector must be wired to the positive pins of
the system elements on either side of it. This is also required for
the negative and signal ground pins of each system element.
Wiring connections for CCN should be made at TB3. See
Fig. 35. Consult the CCN Contractor's
Manual for further
information.

NOTE: Conductors and drain wire must be 20-AWG
(American Wire Gage) minimum stranded, tinned copper.
Individual conductors must be insulated with PVC, PVC/
nylon, vinyl, Teflon, or polyethylene. An aluminum/polyester
100% foil shield and an outer jacket of PVC, PVC/nylon,
chrome vinyl, or Teflon with a minimum operating temperarare range of-20 C to 60 C is required.

Fig. 34 -- Accessory Navigator Display
126

1. Turnoffpower
tothecontrol
box.
2. CuttheCCNwireandstriptheends
ofthered(+),white
(ground),
andblack(-) conductors.
(Substitute
appropriatecolors
fordifferent
colored
cables.)
3. Connect
theredwireto(+)terminal
onTB3oftheplug,
thewhitewiretoCOMterminal,
andtheblack
wiretothe
(-)terminal.
4. TheRJ14
CCNconnector
onTB3canalsobeused,
butis
onlyintended
fortemporary
connection
(forexample,
a
laptop
computer
running
Service
Tool).
CON

5.

Restore power to unit.

IMPORTANT:
A shorted CCN bus cable will prevent
some routines from running and may prevent the unit
from starting. If abnormal conditions occur, unplug the
connector. If conditions return to normal, check the
CCN connector and cable. Run new cable if necessary.
A short in one section of the bus can cause problems
with all system elements on the bus.

BUS

ROOFTOP
UNIT

ROOFTOP
UNIT

COMPUTER WITH
ComfortVlEW TM
SOFTWARE

CCN WEB
OR
NETWORK
OPTIONS

ROuOFTOP

ROuON_TOP

HEATING/COOLING
REMOTE
CCN SITE

TELINK

F

UNITS

/
TO
(RECOMMENDED)
BRIDGE

ITIONAL
MINALS
COMFORT
FAN
POWERED
MIXING
BOX

NON CARRIER
HVAC
EQUIPMENT
COMFORT
CONTROLLER

CON
CID
eL
HVAC

-----

AIR DISTRIBUTION-DIGITAL

AIR VOLUME

LEGEND
Carrier Comfort Network®
ComfortlD Controls
ComfortLink Controls
Heating, Ventilation, and Air Conditioning
TM

TM

Fig. 35 -- CON System Architecture

127

CONTROL

(DAV)

ID

SERVICE

FLUE GAS PASSAGEWAYS
-- The flue collector box and
heat exchanger cells may be inspected by removing gas section
access panel, flue box cover, collector box, and main burner assembly (Fig. 38 and 39). Refer to Main Burners section on
page 139 for burner removal sequence. If cleaning is required,
clean all parts with a wire brush. Reassemble using new hightemperature insulation for sealing.

Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal iniury.

Service Access

-- All unit components can be reached
through clearly labelled hinged access doors. These doors are
not equipped with tiebacks, so if heavy duty servicing is needed, either remove them or prop them open to prevent accidental
closure.
Each door is held closed with 3 latches. The latches are secured to the unit with a single 1/4-in. - 20 x 1/:-in. long bolt. See
Fig. 36.
To open, loosen the latch bolt using a 7/16-in. wrench. Pivot
the latch so it is not in contact with the door. Open the door. To
shut, reverse the above procedure.

LATCH

BOLT

\

NOTE: Disassembly
of the top cover may be required under
special service circumstances. It is very important that the orientation and position of the top cover be marked on the unit
prior to disassembly. This will allow proper replacement of the
top cover onto the unit and prevent rainwater from leaking into
the unit.

Fig. 36 -- Door Latch

SPARK GAP
.125-1N TO .140-IN

SPARK GAP
.142-1N. TO .220-1N.

IMPORTANT: After servicing is completed, make sure
door is closed and relatched properly, and that the latches
are tight. Failure to do so can result in water leakage into
the evaporator section of the unit.

Cleaning

-- Inspect unit interior at beginning of each heating and cooling season and as operating conditions require.
Remove unit side panels and/or open doors for access to unit
interior.
MAIN BURNERS -- At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or
other causes. Observe the main burner flames and adjust if necessary. Check spark gap. See Fig. 37. Refer to Main Burners
section on page 139.

Fig. 37 -- Spark Gap Adjustment

PROPELLER

FAN

'i
BLOWER

MOTOR

SIDE VIEW

IGC
MODULE

\
/

q
NOTES
L
-EE
DETA1,
Torque set screws on blower _SEE
wheel to 70 in, Ib _+2 in, Ib,
_ "-<"_
2, Torque set screw on propeller
'-4.._
fan to 15 in, Ib _+2 in, Ib,
3, Dimensions are in inches, '_

¢L
DETAIL
SCALE

Fig. 38 -- Typical Gas Heating Section

128

A
3:32

of the coil. Failure to clean the coils may result in reduced durability in the enviromnent.
Avoid the use of:
• coil brighteners
• acid cleaning prior to painting
• high pressure washers
• poor quality water for cleaning

FLUE COLLECTOR
MOTOR ASSEMBLY

Totaline enviromnentally
sound coil cleaner is non-flalrnnable, hypoallergenic, nonbacterial, and a USDA accepted biodegradable agent that will not harm the coil or surrounding coinponents such as electrical wiring, painted metal surfaces, or insulation. Use of non-recolmnended
coil cleaners is strongly
discouraged since coil and unit durability could be affected.
FLUE BOX
COVER

FLUE
COLLECTOR
BOX

Yotaline Envilvnmentally
3_und (_il ('leaner
Equipment
• 21/2 gallon garden sprayer
• water rinse with low velocity spray nozzle

FLUE GAS
PASSAGEWAYS

Fig. 39 -- Gas Heat Section Details
COMBUSTION-AIR
BLOWER -- Clean periodically to assure proper airflow and heating efficiency. Inspect blower
wheel every fall and periodically during heating season. For the
first heating season, inspect blower wheel bi-monthly to determine proper cleaning frequency.
To inspect blower wheel, remove heat exchanger access
panel. Shine a flashlight into opening to inspect wheel. If
cleaning is required, remove motor and wheel assembly by
removing screws holding motor mounting plate to top of
combustion fan housing (Fig. 38 and 39). The motor, scroll,
and wheel assembly can be removed from the unit. Remove
scroll from plate. Remove the blower wheel from the motor
shaft and clean with a detergent or solvent. Replace motor and
wheel assembly.
ROUND TUBE PLATE FIN COIL MA_TENANCE
AND
CLEANING
RECOMMENDATIONS
-- Routine
cleaning
of coil surfaces is essential to maintain proper operation of the
unit. Elimination of contamination and removal of harmful residues will greatly increase the life of the coil and extend the life
of the unit. The following maintenance
and cleaning procedures are recolmnended
as part of the routine maintenance activities to extend the life of the coil.

Application

Harsh chemicals, household bleach or acid or basic cleaners should not be used to clean outdoor or indoor coils of
any kind. These cleaners can be very difficult to rinse out
of the coil and can accelerate corrosion at the fin!robe interface where dissimilar materials are in contact. If there is
dirt below the surface of the coil, use the Totaline environmentally sound coil cleaner as described above.

High velocity water from a pressure washer, garden hose,
or compressed air should never be used to clean a coil. The
force of the water or air jet will bend the fin edges and
increase airside pressure drop. Reduced unit performance
or nuisance unit shutdown may occur.
Tomline Envitvnmenmlly
Instructions

3_und

(_il

('leaner

Application

1. Remove any foreign objects or debris attached to the core
face or trapped within the mounting frame and brackets.

Remove Surface Loaded Fibers -- Surface loaded fibers or
dirt should be removed with a vacuum cleaner. If a vacuum
cleaner is not available, a soft non-metallic bristle brash may
be used. In either case, the tool should be applied in the direction of the fins. Coil surfaces can be easily damaged (fin edges
can be easily bent over and damage to the coating of a protected coil) if the tool is applied across the fins.

2.

3.

Put on
glasses
gloves.
Remove
cleaner

personal protective equipment including safety
and/or face shield, waterproof
clothing and
It is recolmnended to use full coverage clothing.
all surface loaded fibers and dirt with a vacuum
as described above.

Thoroughly wet finned surfaces with clean water and a
low velocity garden hose, being careful not to bend fins.
5. Mix Totaline enviromnentally sound coil cleaner in a
21/2 gallon garden sprayer according to the instructions
included with the cleaner. The optimum solution temperamre is 100 E
4.

NOTE: Use of a water stream, such as a garden hose, against a
surface loaded coil will drive the fibers and dirt into the coil.
This will make cleaning efforts more difficult. Surface loaded
fibers must be completely removed prior to using low velocity
clean water rinse.
Periodic Clean Water Rinse -- A periodic clean water rinse is
very beneficial for coils that are applied in coastal or industrial
enviromnents.
However, it is very important that the water
rinse is made with very low velocity water stream to avoid
damaging the fin edges. Monthly cleaning as described below
is reconnnended.

NOTE: Do NOT USE water in excess of 130 F, as the enzymatic activity will be destroyed.

Routine Cleaning of Coil Surfaces -- Monthly cleaning with
Totaline :R:enviromnentally sound coil cleaner is essential to extend the life of coils. This cleaner is available from Carrier Replacement parts division as part number P902-0301 for a one
gallon container, and part number P902-0305 for a 5 gallon
container. It is recolmnended that all coils, including copper
robe aluminum fin, pre-coated fin, copper fin, or E-coated coils
be cleaned with the Totaline enviromnentally sound coil cleaner as described below. Coil cleaning should be part of the unit's
regularly scheduled maintenance procedures to ensure long life

6.

Thoroughly
apply Totaline enviromnentally
cleaner solution to all coil surfaces including
robe sheets and coil headers.

7.

Hold garden sprayer nozzle close to finned areas and
apply cleaner with a vertical, up-and-down motion. Avoid
spraying in horizontal pattern to minimize potential for
fm damage.

8.

Ensure
areas.

9.

Interior and exterior
cleaned.

10.

129

cleaner

thoroughly
finned

penetrates
areas

sound coil
finned area,

deep into finned

must be thoroughly

Finned surfaces should remain wet with cleaning solution
for 10 minutes.

11. Ensure
surfaces
arenotallowed
to drybefore
rinsing.
Reapplying
cleaner
asneeded
toensure
10-minute
saturationisachieved.
12. Thoroughly
rinseallsurfaces
withlowvelocity
clean
waterusingdownward
rinsing
motion
ofwaterspray
nozzle.
Protect
finsfromdamage
fromthespray
nozzle.
MICROCHANNEL
HEATEXCHANGER
(MCHX)CONDENSERCOIL MAINTENANCE
AND CLEANING
RECOMMENDATIONS

Do not apply any chemical cleaners to MCHX condenser
coils. These cleaners can accelerate corrosion and damage
the coil.
Routine cleaning of coil surfaces is essential to maintain
proper operation of the unit. Elhnination of contamination and
removal of harmful residues will greatly increase the life of the
coil and extend the life of the unit. The following steps should
be taken to clean MCHX condenser coils:

Evaporator
(Fig.

Start high pressure water sprayer and purge any soap or
industrial cleaners from sprayer before cleaning condenser coils. Only clean potable water is authorized for cleaning condenser coils.

4.

Clean condenser face by spraying the core steady and
uniformly from top to bottom while directing the spray
straight toward the core. Do not exceed 900 psig or
45 degree angle. The nozzle must be at least 12 in. from
the core face. Reduce pressure and use caution to prevent
damage to air centers.

Excessive water pressure will fracture
air centers and refrigerant tubes.

To change fan speeds, change pulleys.
To align fan and motor pulleys:
1. Shut offunit power supply.
2. Loosen fan shaft pulley bushing.
3. Slide fan pulley along fan shaft.
4. Make angular aligmnent by loosening
mounting plate.
5. Retighten pulley.
6. Return power to the unit.

PULLEY

PULLEY

at

Fig. 40-

1. Prior to reassembling the coupling, loosen the 4 bearing
mounting bolts, which secure the 2 bearings on either side
of the coupling. Remove the drive belts.

FAN SHAFT BEARINGS
-- Lubricate bearings at least every 6 months with suitable bearing grease. Do not over grease.
Typical lubricants are given below:
LUBRICANT

Texaco

Regal AFB-2*

Mobil

Mobilplex EP No. 1

Sunoco
Texaco

Prestige 42
Multifak 2

2.

Reassemble the coupling with the bearings loose. This
allows the coupling to find its own self-aliginnent position.

3.

Check the hub-to-shaft
fit for close fitting clearances.
Replace hubs if high clearances are determined.

4.

Check the key for close-fitted clearances on the sides and
0.015 in. clearance over the top of the key. Replace key if
necessary.
Be sure that hub flanges, flex members, spacer, and hardware are clean and free ofoil.

5.

*Preferred lubricant because it contains rust and oxidation inhibitors.
MOTOR

Evaporator-Fan Alignment
and Adjustment

repair or replacement, it is critical that the coupling be reassembled and aligned correctly to prevent premature failures.
REASSEMBLING
THE COUPL1NG
1NTO THE UNIT
(Fig. 41)

Lubrication

EVAPORATOR-FAN

MOTOR AND FAN
SHAFTS MUST BE
PARALLEL

Evaporator Fan Coupling Assembly E If the coupling has been removed for other blower assembly component

NOTE: The unit requires industrial grade throwaway filters
capable of withstanding face velocities up to 625 fpm.
OUTDOOR-AIR
1NLET SCREENS -- Clean screens with
steam or hot water and a mild detergent. Do not use disposable
filters in place of screens.

AND

from

BE PARALLEL
WITH BELT

FILTERS -- Clean or replace at start of each heating and cooling season, or more often if operating conditions require. Refer
to Installation Instructions for type and size.

CONDENSER

motor

the braze between

CONDENSATE
DRAIN--Check
and clean each year
start of cooling season. In winter, keep drains and traps dry.

MANUFACTURER

Adjustment

IMPORTANT: Check to ensure that the unit drive matches
the duct static pressure using Tables 3-38.

Put on personal protective equipment including safety
glasses and/or face shield, waterproof
clothing and
gloves. It is recolmnended to use full coverage clothing.

3.

Performance

Fan motor pulleys are designed for speed
shown in Physical Data table in unit Installation Instructions
(factory speed setting).

1. Remove any foreign objects or debris attached to the core
face or trapped within the mounting frame and brackets.
2.

Fan

40) E

BEAR-

6.

INGS -- The condenser
and evaporator-fan
motors have permanently sealed bearings,
so no field lubrication
is necessary.

130

Place the flanges onto the shafts with the hub facing outward. Do not tighten the set screws at this time.

CENTER
SHAFT

E

DRIVE

FLEX
MEMBER

SHAFT
FLANGE

SHAFT

BEARINGS

===_ _= E

Fig. 41 -- Evaporator Fan Coupling
7.

Outside of the unit, assemble the flex members to the center drive shaft with 4 bolts and nuts. The flex members
have collars that need to be inserted into the smaller hole
of the drive shaft flange.

6.

Adjust bolts and nut on mounting plate to secure motor in
fixed position. Recheck belt tension after 24 hours of
operation. Adjust as necessary. Refer to Installation Instructions for proper tension values.

8.

Assemble the flex member/drive shaft assembly to one of
the shaft flanges, using 2 bolts and nuts. Slide the other
shaft flange towards the assembly and assemble using
2 bolts and nuts. If the shafts are not misaligned, the collar
in the flex member should line up with the shaft flange
holes.

7.

Restore power to unit.

Evaporator-Fan
1. Turn offunit

Motor Replacement
power supply.

2.

Remove upper outside panel
gain access to motor.

Torque nuts properly to 95 to 100 ft-lb. Do not turn a coupling bolt. Always turn the nut. Always use thread lubricant or anti-seize compound to prevent thread galling.
10. The ends of the shafts should be flush with the inside of
the shaft flange. Torque the set screws to 25 ft-Ib.

3.

Fully retract motor plate adjusting bolts.

4.

Loosen the 2 rear (nearest the evaporator
nuts.

5.

Remove the 2 front motor plate nuts and carriage bolts.

11.

After assembly is complete,
hand for 30 to 60 seconds.

slowly rotate the shafts by

6.

Slide motor plate to the rear (toward the coil) and remove
fan belt(s).

12.

Tighten the bearing mounting bolts, using care not to
place any loads on the shaft which would cause flexure to
the shafts.

7.

13.

Reinstall drive belts. (Refer to Belt Tension Adjustlnent
section below.)

Slide motor plate to the front and hand tighten one of the
rear motor plate nuts (tight enough to prevent the motor
plate from sliding back but loose enough to allow the
plate to pivot upward).

8.

14.

Visually inspect the assembly. If the shafts are overly misaligned, the drive shaft flange will not be parallel with the
shaft flanges.

Pivot the front of the motor plate upward enough to allow
access to the motor mounting hex bolts and secure in
place by inserting a prop.

9.

Remove the nuts from the motor mounting
remove lrlotor.

9.

15.

Recheck nut torque after 1 to 2 hours of operation.
tend to relax after being initially torqued.

Evaporator

Fan Service

1. Turn offunit

Bolts

10.

and Replacement

and open hinged

door to

coil) motor plate

hex bolts and

Replace the locktooth washer under the motor base with a
new washer. Be sure that the washer contacts the motor
base surface.

11. Reverse above steps to install new motor.

power supply.

2.

Remove supply-air

3.
4.

Remove belt and blower pulley.
Loosen setscrews in blower wheels.

section panels.

5.
6.

Remove locking collars from bearings.
Remove shaft.

7. Remove venturi on opposite side of bearing.
8. Lift out wheel.
9.
10.

Reverse above procedure

to reinstall fan.

Check and adjust belt tension as necessary.

11. Restore power to unit.

Belt Tension
1. Turn offunit

Adjustment

E To adjust belt tension:

power supply.

2.
3.

Loosen motor mounting
Loosen fan motor nuts.

4.

Turn motor jacking bolts to move motor mounting plate
left or right for proper belt tension. A slight bow should
be present in the belt on the slack side of the drive while
running under full load.

5.

nuts and bolts. See Fig. 42.
MOTOR
BOLTS

FAN MOTOR
NUTS

Fig. 42 -- Belt Tension Adjustment

Tighten nuts.

131

MOTOR
MOUNTING
NUTS AND
BOLTS

Condenser-Fan

Adjustment

NOTE: Condenser
adjustable.
1. Turn offunit
2.
3.

fans on size 060 MCHX

units

on the chart, add or remove charge in 1/4 Ib increments until
complete. Ensure that all fans are on and all compressors are
running when using charging charts.
To Use the Cooling Charging Chart -- Use the outdoor air
temperature, saturated suction temperature and saturated condensing temperature (available on the (_n_fortLink TM display),
and find the intersection point on the cooling charging chart. If
intersection point is above the line, carefully recover some of
the refrigerant. If intersection point is below the line, carefully
add refrigerant.
NOTE: Indoor-air cfm must be within normal operating range
of unit.

are not

power supply.

Remove fan guard.
Loosen fan hub setscrews.

4. Adjust fan height on shaft using a straightedge placed
across venturi and measure per Fig. 43.
5. Fill hub recess with perlnagum if rubber hubcap is missing.
6. Tighten setscrews and replace panel(s).
7. Turn on unit power.

Four-Inch Filter Replacement-

Thermostatic Expansion Valve (TXV) -- Each circuit

The 4-Inch Filter

has a TXV. The TXV is adjustable and is factory set to maintain
8 to 12 ° F superheat leaving the evaporator coil. The TXV controls flow of liquid refrigerant to the evaporator coils. Adjusting
the TXV is not reconnnended.

Change Mode variable is used to service the unit when 4-in.
filters are used. When the filters need to be changed, set
Service rest-cE4.CH
= YES. The unit will be placed in
Service Test mode and the economizer will move to the 40%
open position to facilitate removal of the 4-in. filters. After the
filters have been changed, set Service Test---_E4. (2Tt = NO to
return the unit to normal operation.

Gas Valve Adjustment
NATURAL GAS -- The 2-stage gas valve opens and closes
in response to the thermostat or limit control.

The economizer damper motor is a
spring return design. In event of power failure, dampers will
return to fully closed position until power is restored.

When power is supplied to valve terminals 3 and 4, the pilot
valve opens to the preset position. When power is supplied to
terminals 1 and 2, the main valve opens to its preset position.

Refrigerant Charge

The regular
(3.5 in. wg).

Power Failure-

_ Amount of refrigerant charge is
listed on unit nameplate. Refer to Carrier GTAC II; Module 5;
Charging, Recovery, Recycling, and Reclamation section for
charging methods and procedures.
Unit panels must be in place when unit is operating
charging procedure.
NOTE: Do not use recycled
contaminants.

refrigerant

as it may

1. Set thermostat

during

Tube,

at setting for no call for heat.

Switch main gas valve to OFF position.

3.

Remove l/s-in, pipe plug from manifold.
manometer pressure-measuring
device.

4.

Switch main gas valve to ON position.

5.

Set thermostat

6.

Remove screw cap covering
(See Fig. 51).

7.

Turn adjustment
counterclockwise

8.

Once desired pressure is established,
heat (3.3-in. wg high fire).

9.

Switch main gas valve to OFF position.

10.

Install a water

at setting to call for heat (high fire).
regulator

adjustment

Remove pressure-measuring
pipe plug and screw cap.

device

SIZE

AJ,AK,AW,AY

R-22

020, 025, 027,
030,035,040,
050, 060
036
041,051

A2,A3,A4,A5

R-410A

020,027, 040,
050,060
030,035

025

and replace

20 F _+2 F
18F_+2F
15 F_+2 F
15 F _+2 F
20 F _+2 F

12F_+2F
UNIT SIZE
020-035, 050
036-041,051,060

I DIMENSION

"A" (in.)

1.30 _+0.12
0.87 _+0.12

Fig. 43 -- Condenser-Fan Adjustment
(All Units Except Size 060 MCHX)

132

l/s-in.

and check heating

LIQUID
SUBCOOLING

48/50A2_A3
_4_A5 Units with MCHX Condenser
-- Due
to the compact, all aluminum
design, microchannel
heat
exchangers will reduce refrigerant charge and overall operating
weight. As a result, charging procedures
for MCHX units
require more accurate measurement techniques. Charge should
be added in small increments. Using cooling charging charts
provided (Fig. 44-50), add or remove refrigerant until conditions of the chart are met. As conditions get close to the point

or

set unit to no call for

Plate Fin Unit Charge

REFRIGERANT
TYPE

screw

screw clockwise to increase pressure
to decrease pressure.

11. Turn main gas valve to ON position
operation.

NOTE: Indoor-air cfm must be within normal operating range
of unit.
123 - Round

on the valve body

2.

contain

All Units with Round Tube-Plate Fin Condenser Coils
-Connect the gage set and a temperature-measuring
device to
the liquid line. Ensure that all condenser fans are operating. It
may be necessary to block part of the coil on cold days to
ensure that condensing pressures are high enough to turn on
the fans. Adjust the refrigerant charge in each circuit to obtain
state point liquid subcooling for specific models as listed in
Table 123.

UNIT
48/50

setting is stamped

To adjust regulator:

NO CHARGEUse standard evacuating techniques. After
evacuating system, weigh in the specified amount of refrigerant from the unit nameplate.
LOW CHARGE COOLING

Table

factory

20 Ton MCHX CIRCUIT
A Charging
Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
150
145
_..

140
135
130

d3

._

125
120

_-

115

I--

110

Reduce

Charge

if Above

Curve

105
Add

Charge

if Below

Curve

1O0
95

-_

9o

a5
so
75
7O
55

60

65

70

75

80
Outdoor

20 Ton

MCHX

All Compressors

85

90

Air Temperature

CIRCUIT

100
(deg

B Charging

on a Circuit

All Outdoor

95

105

110

115

120

125

F)

Chart

Must be Operating

Fans Must be Operating

150
5F
5F

145

5F

_.

140
135
130
125

i Reduce

Charge

if Above Curve

120
_" 115
110
Curve

105
i

-_

100
95

9o

85
8o
75
7O
55

60

65

70

75

80

85

90

95

Outdoor Air Temperature

100

105

110

115

120

125

(deg F)

LEGEND
MCHX-SST --

Microchannel Heat Exchanger
Saturated Suction Temperature

Fig. 44 -- Charging Chart -- 48/50A2,A3,A4,A5020

133

with R-410A Refrigerant

25 and 27 Ton MCHX CIRCUIT A Charging Chart
All Compressors
All Outdoor

on a Circuit
Fans

Must

Must

be Operating

be Operating

15O
145
_--

140

_'_ 135
Reduce

Charge

if Above

Curve

'130
125
120
Q..
E

115

_o._ 110
•_

105

!Add

Charge

if Below Curve

100

-_ g5
o

go

85
80
O0

75
7O
55

60

65

70

75

80

85

90

95

Outdoor Air Temperature

100

(deg

105

110

115

120

125

110

115

120

125

F)

25 and 27 Ton MCHX CIRCUIT B Charging Chart
All Compressors
All Outdoor

on a Circuit
Fans Must

Must

be Operating

be Operating

15O
145
_-

140

¢E_ 135
130
125
_
ffl.

120

E

115

Reduce

Charge

if Above

Curve

_cj_ 110
•_

105

Add Charge

if Below

Curve

100

_

g5

o

go

_
_

85
8o

69

75
7O
55

60

65

70

75

80

85

90

95

Outdoor Air Temperature

100

(deg

105

F)

LEGEND
MCHX-SST --

Microchannel Heat Exchanger
Saturated Suction Temperature

Fig. 45 -- Charging Chart -- 48/50A2,A3,A4,A5025

134

and 027 with R-410A Refrigerant

30 Ton MCHX CIRCUIT A Charging Chart
All Compressors

on a Circuit

All Outdoor

Fans

Must

Must

be Operating

be Operating

150
145
_-,

140

:5_

F

:4!

F

:3!

F

_'_ 135
-_130
125

- Reduce

Charge

if Above

Curve

120
115
110
•_
_)

105

Add

Charge

if Below

Curve

100

-_ 95
0 90
85
8O

2o

75
7O
55

60

65

70

75

80

85

90

95

Outdoor Air Temperature

100

(deg

105

110

115

120

125

F)

30 Ton MCHX CIRCUIT B Charging Chart
All Compressors
All Outdoor

on a Circuit
Fans

Must

Must

be Operating

be Operating

150

....f.......
_5!
F

145

_4!

F

_3!

F

_. 14o
135
130
125

i Reduce

Charge

if Above

Curve

120
Q.
115
110
._

105

Add

Charge

if Below

Curve

100

95

9o
85
89
69

75
7O
55

60

65

70

75

80

Outdoor

85

90

Air Temperature

95

100

(deg

105

110

115

120

F)

LEGEND
MCHX-SST --

Microchannel Heat Exchanger
Saturated Suction Temperature

Fig. 46-

Charging Chart -- 48/50A2,A3,A4,A5030

135

with R-410A Refrigerant

125

35 Ton MCHX CIRCUIT A Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
150

:SST=55

F

145

;SST=45

F

SST=

F

140
-135
Reduce Char{

130

Above Curve

_c2.125
120
115
";

Charge if Below Curve

110
105

©
-'_ 100

95

9o
85
55

60

65

70

75

80

85

90

Outdoor Air Temperature

95
(deg

100

105

110

115

120

F)

35 Ton MCHX CIRCUIT B Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
155
150

SST=

55

SST=

45

SST=

35

145
140
135
Reduce Charge if Above Curve
130
_"125
120
•_

if Below Curve

115
110
105

"_

100

95
9o
85

55

60

65

70

75

80

85

90

Outdoor Air Temperature

95
(deg

100

105

110

115

F)

LEGEND
MCHX-SST --

Microchannel Heat Exchanger
Saturated Suction Temperature

Fig. 47-

Charging Chart -- 48/50A2,A3,A4,A5035

136

with R-410A Refrigerant

120

40 Ton MCHX Charging Chart
All Compressors

on a Circuit

All Outdoor

Must

Fans Must

be Operating

be Operating

150
145
14O
135
130
125
120

Reduce

Charge

if Above

Curve

115
110
105
100
95
9O
85
8O
75
70
55

60

65

70

75

80

85

90

95

Outdoor Air Temperature

100

105

110

115

120

125

(deg F)

LEGEND
MCHX-SST --

Microchannel Heat Exchanger
Saturated Suction Temperature

Fig. 48-

Charging Chart-

48/50A2,A3,A4,A5040

with R-410A Refrigerant

50 Ton MCHX Charging Chart
All Compressors
All Outdoor

on a Circuit Must

be Operating

Fans Must be Operating

150
145
_-

140

o_ 135
'130
125
120

Reduce Charge

if Above Curve

Q_
115
110
•_

105
100

95

9o

8s
8o
°9

75
7O
55

60

65

70

75

80

85

90

Outdoor Air Temperature

95

100

105

110

115

120

125

(deg F)

LEGEND
MCHX-SST --

Microchannel Heat Exchanger
Saturated Suction Temperature

Fig. 49 -- Charging Chart-

48/50A2,A3,A4,A5050

137

with R-410A Refrigerant

60 Ton MCHX CIRCUIT A Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
15o
145

F
F

140

F

135
130
03
125

! Reduce Charge if Above Curve

120

Q..
E 115
03
I-- 110
Ob
._c 105
Add Charge if BelowCurve
100
r-o
©

95
9O
85
8O

03

75
7O
55

60

65

70

75

80

85

90

95

Outdoor Air Temperature

100

105

110

115

120

125

(deg F)

60 Ton MCHX CIRCUIT B Charging Chart
All Compressors on a Circuit Must be Operating
All Outdoor Fans Must be Operating
15O
F

145

F
F

_-, 140
135
130
125

Reduce Charge if Above Curve

120
Q.
E 115
03
I-- 110
o3
_- 105
Add Charge if BelowCurve

t--

03 lOO
tO

95

©

9O

03

85
8O

03

75
7O
55

60

65

70

75

80

85

90

Outdoor Air Temperature

95

100

105

110

115

120

(deg F)

LEGEND
MCHX-SST
--

Microchannel
Heat Exchanger
Saturated
Suction Temperature

Fig. 50-

Charging

Chart -- 48/50A2,A3,A4,AS060

138

with R-410A Refrigerant

125

Main Burners-

For all applications, main
factory set and should require no adjusUnent.
MAIN BURNER

REMOVAL

1. Shut off (field-supplied)

burners

are

OUTLET PRESSURE
TAP (ON SIDE)
1/8-1N. 27 NPT

(Fig. 52)
manual main gas valve.

2.

Shut offpower

3.

Remove heating access panel.

4.

Disconnect

5.
6.

Remove wires from gas valve.
Remove wires from rollout switch.

7.

Remove sensor wire and ignitor cable from IGC board.

8.

Remove 2 screws securing manifold

9.

Remove 4 screws that hold
flange to the vestibule plate.

HIGH-FIRE REGULATOR
ADJUSTMENT SCREW

supply to unit.

LOW-FIRE REGULATOR
ADJUSTMENT SCREW

gas piping from gas valve inlet.

the burner

10.

Lift burner assembly out of unit.

11.

Reverse procedure

Filter Drier

bracket to basepan.
support

INLET PRESSURE
TAP (ON SIDE)
1/8-1N.27 NPT

plate

to re-install burners.

-- Replace
posed to atmosphere.

whenever

ON/OFF SWITCH

Fig. 51 -- Gas Valve (Part Number EF33CW271)

refrigerant

system is ex-

Replacement

Parts -- A complete list of replacement
parts may be obtained from any Carrier distributor upon request.

OETAIt C
SCALE t :4

A

1/8-1N.
PIPE PLUG

SCALE1:4

BURNERS
SEE DETA IL

GAS
VALV

\

\

SEE DETAIL

\

\
i

t

BURNER
MANIFOLD

Fig. 52 -- Main Burner Removal

139

APPENDIX A -- LOCAL DISPLAY TABLES
MODE -- RUN STATUS
ITEM
VIEW
-_HVAC
-_OCC
-_MAT
-_EDT
-_LAT
-_EC. C.P
-_ECN.P
-_CL.C.P
-_C.CAP
-_HT.C.P
-_HT.ST
-_H.MAX
ECON
-_ECN.P
-_ECN.C
-_ACTV
-_DISA
-_DISA-_UNAV
-_DISA-_R.EC.D
-_DISA-_DBC
-_DISA-_DEW
-_DISA-_DDBC
-_DISA-_OAEC
-_DISA-_DEC
-_DISA-_EDT
-_DISA-_OA T
-_DISA-_FORC
-_DISA-_SFON
-_DISA-_CLOF
-_DISA-_OAQL
-_DISA-_HELD
-_DISA-_DH.DS
-_O.AIR
-_O.AIR-_OA T
-_O.AIR-_OA.RH
-_O.AIR-_OA.E
-_O.AIR-_OA.D. T
COOL
-_C.CAP
-_CUR.S
-_REQ.S
-_MAX.S
-_DEM.L
-_SUMZ
-_SUMZ-_SMZ
-_SUMZ-_ADD.R
-_SUMZ-_SUB.R
-_SUMZ-_R.PCT
-_SUMZ-_ Y.MIN
-_SUMZ-_ Y.PL U
-_SUMZ-_Z.MIN
-_SUMZ-_Z.PL U
-_SUMZ-_H. TMP
-_SUMZ-_L. TMP
-_SUMZ-_PULL
-_SUMZ-_SLOW
TRIP
-_UN.C.S
-_UN. C.E
-_OC.C.S
-_OC.C.E
-_TEMP
-_OC.H.E
-_OC.H.S
-_UN.H.E
-_UN.H.S
-_HVAC
LINK
-_MODE
-_L.Z. T
-_L.C.SP
-_L.H.SP
HRS
-_HR.A I
-_HR.A2
-_HR.BI
-_HR. B2
STRT
_ST.A 1
_ST.A2
-_ST.B1
-_ST.B2

EXPANSION
AUTO VIEW OF RUN STATUS
ascii string spelling out the hvac modes
Occupied ?
Mixed Air Temperature
Evaporator Discharge Tmp
Leaving Air Tempe ratu re
Economizer Control Point
Economizer Act.Curr.Pos.
Cooling Control Point
Current Running Capacity
Heating Control Point
Requested Heat Stage
Maximum Heat Stages
ECONOMIZER RUN STATUS
Economizer Act.Curr.Pos.
Economizer Act.Cmd.Pos.
Economizer Active ?
ECON DISABLING CONDITIONS
Econ Act. Unavailable?
Remote Econ. Disabled ?
DBC - OAT Lockout?
DEW - OA Dewpt.Lockout?
DDBD- OAT > RAT Lockout?
OAEC- OA Enth Lockout?
DEC - Diff.Enth.Lockout?
EDT Sensor Bad?
OAT Sensor Bad ?
Economizer Forced ?
Supply Fan Not On 30s ?
Cool Mode Not In Effect?
OAQ Lockout in Effect ?
Econ Recovery Hold Off?
Dehumid. Disabled Econ?
OUTSIDE AIR INFORMATION
Outside Air Temperature
Outside Air Rel. Humidity
Outside Air Enthalpy
OutsideAir Dewpoint Temp
COOLING INFORMATION
Current Running Capacity
Current Cool Stage
Requested Cool Stage
Maximum Cool Stages
Active Demand Limit
COOL CAR STAGE CONTROL
Capacity Load Factor
Next Stage EDT Decrease
Next Stage EDT Increase
Rise Per Percent Capacity
Cap Deadband Subtracting
Cap Deadband Adding
Cap Threshold Subtracting
Cap Threshold Adding
High Temp Cap Override
Low Temp Cap Override
Pull Down Cap Override
Slow Change Cap Override
MODE TRIP HELPER
Unoccup. Cool Mode Start
Unoccup. Cool Mode End
Occupied Cool Mode Start
Occupied Cool Mode End
CtI.Temp RAT,SPT or Zone
Occupied Heat Mode End
Occupied Heat Mode Start
Unoccup. Heat Mode End
Unoccup. Heat Mode Start
ascii string spelling out the hvac modes
CCN - LINKAGE
Linkage Active - CCN
Linkage Zone Control Tmp
Linkage Curr. Cool Setpt
Linkage Curr. Heat Setpt
COMPRESSOR RUN HOURS
Compressor A1 Run Hours
Compressor A2 Run Hours
Compressor B1 Run Hours
Compressor B2 Run Hours
COMPRESSOR STARTS
Compressor A1 Starts
Compressor A2 Starts
Compressor B1 Starts
Compressor B2 Starts

RANGE

UNITS

YES/NO

0-1 O0

dF
dF
dF
dF
%
dF
dF

0-1 O0
0-1 O0
YES/NO

%
%

YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO

dF

140

ECONOPOS
ECONOCMD
ECACTIVE

forcible

forcible

OAT
OARH
OAE
OADEWTMP

forcible
forcible

PAGE NO.
90,91
90,91
90,91
90,91
90,91
50,63,70,90,91
90,91
41,42,63,90,91
90,91
53,90,91
54,55,90,91
54,90,91
50,64,91
64,91
42,50,64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91
64,91

%

CAPTOTAL
COOL STG
CL ST-AGE
CL_IAXSTG
DEM_LIM

%
deltaF
deltaF

SMZ
ADDRISE
SUBRISE
RISE PCT
Y MlhlUS
YPLUS
ZMINUS
Z PLUS
H/TEMP
LOW TEMP
PULLDOWN
SLO CHNG

46,47,49,90,92
46,47,63,90,92
46,47,90,92
46,47,90,92
46-48,90,92
46,47,90,92
46,47,90,92
43,46,47,90,92
46,47,90,92
46,47,90,92
46,47,90,92
46,47,90,92
46,47,91,92
46,47,91,92
46,47,91,92
46,47,91,92
46,47,91,92
47,91,92

UCCLSTRT
UCCL END
OCCLSTRT
OCCL END
CTRL-I=EMP
OCHT END
OCHT,STRT
UCHT END
UCHT,STRT
string

46,53,92
46,53,92
46,53,92
46,53,92
46,53,92
46,53,92
46,53,92
46,53,92
46,53,92
46,53,92

dF
dF
dF

MODELINK
LZT
LCSP
LHSP

92
92
92
92

HRS
HRS
HRS
HRS

HRA1
HRA2
HRB1
HR_B2

config
config
config
config

92
92
92
92

CYA1
CYA2
CYB1
CY_B2

config
config
config
config

92
92
92
92

ON/OFF

0-999999
0-999999
0-999999
0-999999

string
OCCUPIED
MAT
EDT
LAT
ECONCPNT
ECONOPOS
COOLCPNT
CAPTOTAL
HEATCPNT
HT STAGE
HT_IAXSTG

WRITE STATUS

ECONUNAV
ECONDISA
DBC STAT
DEW- STAT
DDBCSTAT
OAECSTAT
DEC STAT
EDT STAT
OAT STAT
ECONFORC
SFONSTAT
COOL OFF
OAQLOCKD
ECONHELD
DHDISABL
dF
%

0-999999
0-999999
0-999999
0-999999

CCN POINT

forcible

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- RUN STATUS (cont)
ITEM

EXPANSION

TMGD
-_ TG.A 1
-_ TG.A2
-_TG.B1
-_ TG.B2
-_TG.H1
-_ TG.H2
-_ TG.H3
-_ TG.H4
-_ TG.H5
-_ TG.H6

RANGE

UNITS

CCN POINT

TIMEGUARDS
Compressor A1 Timeguard
Compressor A2 Timeguard
Compressor B1 Timeguard
Compressor B2 Timeguard
Heat Relay 1 Timeguard
Heat Relay 2 Timeguard
Heat Relay 3 Timeguard
Heat Relay 4 Timeguard
Heat Relay 5 Timeguard
Heat Relay 6 Timeguard
SOFTWARE VERSION NUMBERS
CESR131343-xx-xx
CESR131249-xx-xx
CESR131249-xx-xx
CESR131226-xx-xx
CESR131174-xx-xx
CESR131171 -xx-xx
CESR130227-xx-xx

VERS
-_MBB
-_ECB1
-_ECB2
-_SCB
-_CEM
-_MARQ
-_NA Vl

WRITE STATUS

PAGE NO.

CMPA1 TG
CMPA2 TG
CMPB1 TG
CMPB2 TG
HS1TC_
HS2TG
HS3TG
HS4TG
HS5TG
HS6TG

93
93
93
93
93
93
93
93
93
93

string
string
string
string
string
string
string

93
93
93
93
93
93
93

MODE -- SERVICE TEST
ITEM
TEST
STOP
S.STP
FAN.F
F.4.CH
INDP
-_ECN. C
-_E.PWR
-_E.CAL
-_PE.A
-_PE.B
-_ PE. C
-_H.LR
-_ALRM
FANS
-_S.FAN
-_S. VFD
-_CD.F.A
-_CD.F.B
COOL
-_A 1
-_A2
-_MLV
-_B1
-_B2
HEAT
-_HT.ST
-_HT. 1
-_HT.2
-_HT.3
-_HT.4
-_HT.5
-_HT.6

EXPANSION

RANGE

Service Test Mode
Local Machine Disable
Soft Stop Request
Supply Fan Request
4 in. Filter Change Mode
TEST INDEPENDENT OUTPUTS
Economizer Act.Cmd.Pos.
Economizer Power Test
Calibrate the Economizer?
Power Exhaust Relay A
Power Exhaust Relay B
Power Exhaust Relay C
Heat Interlock Relay
Remote Alarm/Aux Relay
TEST FANS
Supply Fan Relay
Supply Fan VFD Speed
Condenser Fan Circuit A
Condenser Fan Circuit B
TEST COOLING
Compressor A1 Relay
Compressor A2 Relay
Min. Load Valve (HGBP)
Compressor B1 Relay
Compressor B2 Relay
TEST HEATING
Requested Heat Stage
Heat Relay 1
Heat Relay 2
Relay 3 W1 Gas Valve 2
Relay 4 W2 Gas Valve 2
Relay 5 W1 Gas Valve 3
Relay 6 W2 Gas Valve 3

UNITS

CCN POINT

WRITE STATUS

PAGE NO.

ON/OFF
YES/NO
YES/NO
YES/NO
YES/NO

MAN CTRL
UNIT-STOP
SOFTSTOP
SFANFORC
FILT4CHG

ON/OFF
ON/OFF

ECONCTST
ECONPTST
ECON CAL
PE A =I-ST
PE B TST
PE C TST
HIR TST
ALR-M TST

30
30
30
30
30
30
30
30

SFAN TST
SGVF-DTST
CNDA TST
CNDB_TST

3O
3O
3O
3O

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

CM PAl TST
CMPA2TST
MLV TST
CMPB1TST
CMPB2TST

30
30
30
30
30

O-MAX
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

HTST TST
HS1TST
HS2 TST
HS3_TST
HS4_TST
HS5 TST
HS6 TST

30
30
30
30
30
30
30

ON/OFF
0-100
ON/OFF
ON/OFF

%

27,29,30
29,30
29,30
29,30

config
forcible
forcible

MODE -- TEMPERATURES
ITEM
AIR.T
-_CTRL
-_CTRL-_EDT
-_CTRL-_LAT
-_CTRL-_MAT
-_CTRL-_R. TMP
-_CTRL-_S. TMP
-_SAT
-_ OA T
-_RAT
-_SPT
-_SPTO
-_S.G.LS
-_S.G.L1
-_S.G.L2
-_S.G.L3
-_S.G.LM
REF. T
-_SCT.A
-_SST.A
-_SCT.B
-_SST.B

EXPANSION
AIR TEMPERATURES
CONTROL TEMPS
Evaporator Discharge Tmp
Leaving Air Tempe ratu re
Mixed Ai r Tempe ratu re
Controlling Return Temp
Controlling Space Temp
Air Tmp Lvg Supply Fan
Outside Air Temperature
Return Air Temperature
Space Temperatu re
Space Temperatu re Offset
Staged Gas LAT Sum
Staged Gas LAT 1
Staged Gas LAT 2
Staged Gas LAT 3
Staged Gas Limit Sw.Temp
REFRIGERANT TEMPERATURES
Cir A Sat.Condensing Tmp
Cir A Sat.Suction Temp.
Cir B Sat.Condensing Tmp
Cir B Sat.Suction Temp.

RANGE

-40-240
-40-240

141

UNITS

CCN POINT

dF
dF
dF
df
df
dF
dF
dF
dF
^F
dF
dF
dF
dF
dF

EDT
LAT
MAT
RETURN T
SPACE_TSAT
OAT
RAT
SPT
SPTO
LAT SGAS
LAT1-SGAS
LAT2SGAS
LAT3SGAS
LIMSWTMP

dF
dF
dF
dF

SCTA
SSTA
SCTB
SSTB

WRITE STATUS

forcible
forcible
forcible
forcible
forcible
forcible

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- PRESSURES
ITEM
AIR.P
-*SP
-*BP
REF.P
-*DP.A
-*SP.A
-,DAB
-,SP.B

EXPANSION

RANGE

AIR PRESSURES
Static Pressure
Building Pressure
REFRIGERANT PRESSURES
Cir A Discharge Pressure
Cir A Suction Pressure
Cir B Discharge Pressure
Cir B Suction Pressure
MODE

ITEM
OHSP
OCSP
UHSP
UCSP
GAP
VC.ON
VC.OF
SASP
SA.HI
SA.LO
SA.HT
T.PRG
T.CL
T.VOC
T.VUN

--

UNITS
"H20
"H20

SP
BP

PSIG
PSIG
PSIG
PSIG

DPA
SPA
DPB
SPB

WRITE STATUS

SET POINTS

DESCRIPTION

RANGE
40 -99
40 -99
40 -99
40 -99
2-10
0-25
1-25
45-75
45 -75
45 -75
80-120
-20-80
5-75
-20-80
-20-80

Occupied Heat Setpoint
Occupied Cool Setpoint
Unoccupied Heat Setpoint
Unoccupied Cool Setpoint
Heat-Cool Setpoint Gap
VAV Occ. Cool On Delta
VAV Occ. Cool Off Delta
Supply Air Setpoint
Supply Air Setpoint Hi
Supply Air Setpoint Lo
Heating Supply Air Setpt
Tempering Purge SASP
Tempering in Cool SASP
Tempering Vent Occ SASP
Tempering Vent Unocc. SASP

CCN POINT

UNITS
dF
dF
dF
dF
deltaF
deltaF
deltaF
dF
dF
dF
dF
dF
dF
dF
dF

CCN POINT
OHSP
OCSP
UHSP
UCSP
HCSP GAP
VAVOCON
VAVOCOFF
SASP
SASP HI
SASP LO
SASPHEAT
TEMPPURG
TEMPCOOL
TEMPVOCC
TEMPVUNC

DEFAULT
68
75
55
90
5
3.5
2
55
55
60
85
50
5
65
50

MODE -- INPUTS
ITEM
GEN.I
-,FLT.S
-,G.FAN
-,REMT
-,E.SW
-, E. ENA
-,E.OVR
-,S.FN.S
-,DL.S1
-,DL.S2
-,DH.IN
FD.BK
-,CS.A 1
-,CS.A2
-,CS.B1
-,CS.B2
STAT
-,G
-,W1
-, W2
-,Y1
-, Y2
FIRE
-,FSD
-,PRES
-,EVAC
-,PURG
RELH
-,OA.RH
-,OA.EN
-,OA.DP
-,RA.RH
-,RA.EN
AIR.Q
-,IAQ.I
-,IAQ
-,OAQ
-,DAQ
-,IQ.R O
RSET
-,SA.S.R
-,SP.RS

EXPANSION
GENERAL INPUTS
Filter Status Input
Fan Request From IGC
Remote Input State
Economizer Control Input
Remote Economizer Enable
Econo Position Override
Supply Fan Status Switch
Demand Limit Switch 1
Demand Limit Switch 2
Dehumidify Switch Input
COMPRESSOR FEEDBACK
Compressor A1 Feedback
Compressor A2 Feedback
Compressor B1 Feedback
Compressor B2 Feedback
THERMOSTAT INPUTS
Thermostat G Input
Thermostat W1 Input
Thermostat W2 Input
Thermostat Y1 Input
Thermostat Y2 Input
FIRE-SMOKE INPUTS
Fire Shutdown Input
Pressurization Input
Evacuation Input
Smoke Purge Input
RELATIVE HUMIDITY
Outside Air Rel. Humidity
Outdoor Air Enthalpy
OutsideAir Dewpoint Temp
Return Air Rel. Humidity
Return Air Enthalpy
AIR QUALITY SENSORS
IAQ - Discrete Input
IAQ - PPM Return C02
OAQ - PPM Return C02
Diff.Air Quality in PPM
IAQ Min.Pos. Override
RESET INPUTS
Supply Air Setpnt. Reset
Static Pressure Reset

RANGE

UNITS

D RTY/C LN
ON/OFF

CCN POINT

WRITE STATUS

YES/NO
YES/NO
YES/NO
ON/OFF
ON/OFF
ON/OFF
ON/OFF

FLTS
IGCFAN
RMTIN
ECOSW
ECONENBL
ECOORIDE
SFS
DMD SWl
DMD SW2
DHD/SCIN

ON/OFF
ON/OFF
ON/OFF
ON/OFF

CSBA1
CSBA2
CSBB1
CSB_B2

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

G
W1
W2
Y1
Y2

forcible
forcible
forcible
forcible
forcible

ALARM/NORMAL
ALARM/NORMAL
ALARM/NORMAL
ALARM/NORMAL

FSD
PRES
EVAC
PURG

forcible
forcible
forcible
forcible

OARH
OAE
OADEWTMP
RARH
RAE

forcible

IAQIN
IAQ
OAQ
DAQ
IAQMINOV

forcible
forcible
forcible

SASPRSET
SPRESET

forcible
forcible

%
dF
%

H IGH/LOW

%
AF

forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible

forcible

forcible

*The display text changes depending on the remote switch configuration (Configuration-_UNIT-_RM.CF).
If RM.CF is set to 0 (No Remote
Switch), then the display text will be "On" or "Off." If RM.CF is set to 1 (Occupied/Unoccupied
Switch), then the display text will be "Occupied" or
"Unoccupied." If RM.CFis set to 2 (Start/Stop), then the display text will be "Stop" or "Start." If RM.CFis set to 3 (Override Switch), then the display
text will be "No Override" or "Override."

142

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- INPUTS (cont)
ITEM
4-20
-dAQ.M
-_OAQ.M
-_SP.R.M
-_DML.M
-_EDR. M
-_ORH.M
-_RRH.M
-_BP.M
-_BP.M. T
-_SP.M
-_SP.M. T

EXPANSION
4-20 MILLIAMP INPUTS
IAQ Milliamps
OAQ Milliamps
SP Reset milliamps
4-20 ma Demand Signal
EDT Reset Milliamps
OARH Milliamps
RARH Milliamps
BP Milliamps
Bldg. Pressure Trim (ma)
SP Milliamps
Static Press. Trim (ma)

RANGE

UNITS

CCN POINT

ma
ma
ma
ma
ma
ma
ma
ma

WRITE STATUS

IAQ MA
OA_MA
SPRST MA
DMDLMTMA
EDTRESMA
OARH MA
RARH MA
BP M,_,
BP_4ATRIM
SP MA
SP_4ATRIM

-2.0 - 2.0
ma

-2.0 - 2.0

forcible

config
config

*The display text changes depending on the remote switch configuration (Configuration-_UNIT-_RM.CF).
If RM.CF is set to 0 (No Remote
Switch), then the display text will be "On" or "Off." If RM.CF is set to 1 (Occupied/Unoccupied
Switch), then the display text will be "Occupied" or
"Unoccupied." If RM.CFis set to 2 (Start/Stop), then the display text will be "Stop" or "Start." If RM.CFis set to 3 (Override Switch), then the display
text will be "No Override" or "Override."

MODE -- OUTPUTS
ITEM

EXPANSION

FANS
-_S.FAN
-_S. VFD
-_P.E.A
-_P.E.B
-_P.E.C
-_CD.F.A
-_CD.F.B

FANS
Supply Fan Relay
Supply Fan VFD Speed
Power Exhaust Relay A
Power Exhaust Relay B
Power Exhaust Relay C
Condenser Fan Circuit A
Condenser Fan Circuit B

COOL
-_A 1
-_A2
-_MLV
-_B1
-_B2

COOLING
Compressor A1 Relay
Compressor A2 Relay
Min. Load Valve (HGBP)
Compressor B1 Relay
Compressor B2 Relay
HEATING
Heat Relay 1
Heat Relay 2
Relay 3 Wl Gas Valve 2
Relay 4 W2 Gas Valve 2
Relay 5 Wl Gas Valve 3
Relay 6 W2 Gas Valve 3
Heat Interlock Relay
ECONOMIZER
Economizer Act.Curr.Pos.
Economizer Act.Cmd.Pos.
Economizer Power Relay
GENERAL OUTPUTS
Remote Alarm/Aux Relay

HEAT
-_HT. 1
-_HT.2
-_HT.3
-_HT.4
-_HT.5
-_HT.6
-_H.LR
ECON
-_ECN.P
-_ECN. C
-_E.PWR
GEN. 0
ALRM

RANGE

UNITS

ON/OFF
01100
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

CCN POINT

WRITE STATUS

SFAN RLY
SFAN VFD
PEA
PEB
PE C
CO-NDFANA
CONDFANB

%

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

CMPA1
CMPA2
MLV
CMPB1
CMPB2

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

HS1
HS2
HS3
HS4
HS5
HS6
HIR

forcible

ECONOPOS
ECONOCMD
ECONPWR

forcible
forcible

ALRM

forcible

0-100
0-100
ON/OFF

%
%

ON/OFF

MODE -- CONFIGURATION
ITEM
UNIT
-_ C. TYP
-_CVFN
-_RM. CF
-_CEM
-_ TCS.C
-_ TCS.H
-_SFS.S
-_SFS.M
-_ VAV.S
-_SlZE
-_DP.XR
-_SP.XR
-_RFG. T
-_ CND. T
-_MAT.S
-_MAT.R
-_MAT.D
-_ALTI
-_DLAY
-_STAT
-_AUX.R
-_SENS
-_SENS-_SPT.S
-_SENS-_SP. O.S
-_SENS-_SP. O.R
-_SENS-_RRH.S
-_SENS-_FL T.S

EXPANSION
UNIT CONFIGURATION
Machine Control Type
Fan Mode (O=Auto, l=Cont)
Remote Switch Config
CEM Module Installed
Temp.Cmp.Strt.Cool Factr
Temp.Cmp.Strt.Heat
Factr
Fan Fail Shuts Down Unit
Fan Stat Monitoring Type
VAV Unocc.Fan Retry Time
Unit Size (20-60)
Disch.Press. Transducers
Suct. Pres. Trans. Type
Refrig: 0=R22 1=R410A
Cnd HX Typ:O=RTPF I=MCHX
MAT Calc Config
Reset MAT Table Entries?
MAT Outside Air Default
Altitude ........ in feet:
Startup Delay Time
TSTAT-Both Heat and Cool
Auxiliary Relay Config
INPUT SENSOR CONFIG
Space Temp Sensor
Space Temp Offset Sensor
Space Temp Offset Range
Return Air RH Sensor
Filter Stat.Sw.Enabled ?

RANGE

UNITS

CCN POINT

DEFAULT

1 - 6 (multi-text strings)

CTRLTYPE

0 - 1 (multi-text
0 - 3 (multi-text
Yes/No
0 - 60
0 - 60
Yes/No
0 - 2 (multi-text
0 - 720
20 - 60
Yes/No
0 - 1 (multi-text
0 - 1 (multi-text
0 - 1 (multi-text
0 - 2 (multi-text
Yes/No
0-100
0 - 60000
0 - 900
Yes/No
0-3

FAN MODE
RMT/NCFG
CEM BRD
TCS-I=COOL
TCSTHEAT
SFS SHUT
SFS MON
SAMPMINS
UNITSIZE
DP TRANS
SPXRTYPE
REFRIG T
COILTYPE
MAT SEL
MATRESET
MATOADOS
ALTITUDE
DELAY
TSTATALL
AUXRELAY

1
o
No
0
0
No
0
5O
2O
No
0
1
0
1
No
2O
0
0
No
0

SPTSENS
SPTOSENS
SPTO RNG
RARH-SENS
FLTS_ENA

Disable
Disable
5
Disable
Disable

Enable/Disable
Enable/Disable
1 -10
Enable/Disable
Enable/Disable

143

strings)
strings)
min
min
strings)

min

strings)
strings)
strings)
strings)
%
sec

PAGE NO.
27,28,32,35-37,
63,75,96
27,28,35,36
31,35,36,74
35,36
35,36
36
36,60,1 O0
35,36,60,100
36
36,38,42,49
36,97
36
36,38,49
36,38,49
36,47,48
36,37,47,48
36,37
36,37
36,37
36,37
36,37
36
27,28,36,37
36,37,75
36,37,75
36,37,61,97,99
36,37,60,100

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- CONFIGURATION (cont)
ITEM
COOL
-_Z. GN
-_MC.LO
-_C.FOD
-_MLV
-_M.M.
-_HPSP
-_A1.EN
-_A2.EN
-_B1.EN
-_B2.EN
-_CS.A 1
-_CS.A2
-_CS.B1
-_CS.B2
-_REVR
-_H.SST

EXPANSION

EDT.R
-_RS.CF
-_RTIO
-_LIMT
-_RES.S

COOLING
CONFIGURATION
Capacity Threshold Adjst
Compressor
Lockout Temp
Fan-Off Delay, Mech Cool
Min. Load Valve? (HGBP)
Motor Master Control
Head Pressure Setpoint
Enable Compressor
A1
Enable Compressor
A2
Enable Compressor
B1
Enable Compressor
B2
CSB A1 Feedback Alarm
CSB A2 Feedback Alarm
CSB B1 Feedback Alarm
CSB B2 Feedback Alarm
Rev Rotation Verified ?
Hi SST Alert Delay Time
EVAP.DISCHRGE
TEMP RESET
EDT Reset Configuration
Reset Ratio
Reset Limit
EDT 4-20 ma Reset Input

HEAT
-_HT.CF
-_HT.SP
-_OC.EN
-_LAT.M
-_G.FOD
-_E.FOD
-_SG.CF
-_SG.CF-_HT.ST
-_SG.CF-_CAP.M
-_SG.CF-_M.R.DB
-_SG.CF-_S.G.DB
-_SG.CF-_RISE
-_SG.CF-_LAT.L
-_SG.CF-_LIM.M
-_SG.CF-_SI/V.H.
T
-_SG.CF-_SW.L.
T
-_SG.CF-_HT.P
-_SG.CF-_HT.D
-_SG.CF-_HT.
TM

HEATING CONFIGURATION
Heating Control Type
Heating Supply Air Setpt
Occupied Heating Enabled
MBB Sensor Heat Relocate
Fan-Off Delay, Gas Heat
Fan-Off Delay, Elec Heat
STAGED GAS CONFIGS
Staged Gas Heat Type
Max Cap Change per Cycle
S.Gas DB min.dF/PID
Rate
St.Gas Temp. Dead Band
Heat Rise dF/sec Clamp
LAT Limit Config
Limit Switch Monitoring?
Limit Switch High Temp
Limit Switch Low Temp
Heat Control Prop. Gain
Heat Control Defy. Gain
Heat PID Rate Config

SP
-_SP.CF
-_SP.FN
-_SP.S
-_SP.LO
-_SP.HI
-_SP.SP
-_SP.MN
-_SP.MX
-_SP.FS
-_SP.RS
-_SP.RT
-_SP.LM
-_SP.EC
-_S.PID
-_S.PID->SP.
TM
-_S.PID->SP.P
-_S.PID->SP.I
-_S.PID->SP.D
-_S.PID->SP.SG

SUPPLY STATIC PRESS.CFG.
Static Pressure Config
Static Pres.Fan Control?
Static Pressure Sensor
Static Press. Low Range
Static Press. High Range
Static Pressure Setpoint
VFD Minimum Speed
VFD Maximum Speed
VFD Fire Speed Override
Stat. Pres. Reset Config
SP Reset Ratio ("/dF)
SP Reset Limit in iwcC)
SP Reset Econo.Position
STAT.PRESS.PID
CONFIGS
Stat.Pres.PID
Run Rate
Static Press. Prop. Gain
Static Pressure Intg. Gain
Static Pressure Defy. Gain
Static Press.System
Gain

ECON
-_EC.EN
-_EC.MN
-_EC.MX

ECONOMIZER
CONFIGURATION
Economizer
Installed?
Economizer
Min. Position
Economizer
Max. Position

-_E. TRM
-_E.SEL
-_OA.E.C
-_OA.EN
-_OAT.L
-_O.DEW
-_ORH.S
-_E. TYP
-_EC.SW
-_E.CFG
-_E.CFG-_E.P.GN
-_E.CFG -_E. RNG
-_E.CFG -_E. SPD
-_E.CFG-_E.DBD
-_UEFC
-_UEFC-_FC.
CF
-_UEFC-_FC.
TM
-_UEFC-_FC.
L. 0

Economzr Trim For SumZ ?
Econ ChangeOver Select
OA Enthalpy ChgOvr Selct
Outdr.Enth Compare Value
High OAT Lockout Temp
OA Dewpoint Temp Limit
Outside Air RH Sensor
Economizer Control Type
Economizer Switch Config
ECON.OPERATION CONFIGS
Economizer Prop.Gain
Economizer Range Adjust
Economizer Speed Adjust
Economizer Deadband
UNOCC.ECON.FREE COOLING
Unoc Econ Free Cool Cfg
Unoc Econ Free Cool Time
Un.Ec. Free Cool OAT Lock

RANGE
-10 - 10
-20 - 55
0 - 600
Yes/No
Yes/No
80 - 150
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Yes/No
5 - 30
0 - 3 (multi-text
0-10
0 - 20
Enable/Disable

-

28,38
28,38
28,38
28,35,38,96

HEATTYPE
SASPHEAT
HTOCCENA
HTLATMON
GAS FOD
HEAT FOB

0
85
No
No
45
3O

50,51,56,71
50,51
51
51
51
51

HTSTGTYP
HTCAPMAX
HT MR DB
HT SG DB
HTSGRISE
HTLATLIM
HTLIMMON
HT_LIMHI
HT_LIMLO
HT_PGAIN
HT DGAIN
HTSGPIDR

0
45
0.5
2
0.06
10
No
170
160
1
1
9O

51,53-56
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54
51,53,54

STATICFG
STATPFAN
SPSENS
SP_LOW
SP HIGH
SPSP
STATPMIN
STATPMAX
STATPFSO
SPRSTCFG
SPRRATIO
SPRLIMIT
ECONOSPR

No
Yes
Disable
0
5
1.5
2O
100
100
0
0.2
0.75
5

SPIDRATE
STATP_PG
STATP_IG
STATP_DG
STATP SG

2
2O
2
0
1

31,57,58,60
57,58
57,58
57,58
57,58
28,57,58
58
58
58,67
31,58,59
58
58
58
58,59
58,59
58,59
58,59
58,59
58,59

ECON ENA
ECONOMIN
ECONOMAX

Yes
5
98

ECONTRIM
ECON_SEL
OAECSEL
OAEN CFG
OAT LOCK
OADEWCFG
OARHSENS
ECON CTL
ECOS_A/CFG

Yes
1
4
24
6O
55
Disable
1
0

28,60,62
28,60,62
28,42,43,50,60,
62
28,47,60,62
28,60-62
28,61,62
28,61,62
28,61,62
28,61,62
28,61,62,96
61,62
61,62

AF

EC_PGAIN
EC_RANGE
EC_SPEED
EC DBAND

1
2.5
0.75
0.5

62
62
62
62

min
dF

UEFC CFG
UEFCTIME
UEFCNTLO

0
120
5O

62
62
62

dF

AF
AF
dF
dF

"H20
%
%
%

%
sec

%
%

Yes/No
0 - 3 (multi-text strings)
1 - 5 (multi-text strings)
18 - 28
-40 - 120
50 - 62
Enable/Disable
1-3 (multi-text strings)
0 - 2 (multi-text strings)
0.7
0.5
0.1
0.1

0
2
10
Disable

deltaF

Yes/No
0 - 100
0 - 100

- 3.0
- 5.0
- 10.0
-2.0

0-2 (multi-text
0 - 720
40 - 70

144

dF
dF

AF

strings)

NO.

EDRSTCFG
RTIO
LIMT
EDTRSENS

strings)

200
100
50
50
50

PAGE
39,46,91
39,48
39
39,75
39,49
39,49
39
39
39
39
39,100
39,100
39,100
39,100
39,98
39,97

min

0 - 1 (multi-text strings)
Yes
Enable/Disable
-10 - 0
0-10
0-5
0 - 100
0 - 100
0 - 100
0-4 (multi-text strings)
0 - 2.00
0 - 2.00
0 - 100

DEFAULT
1
40
60
No
No
113
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
No
10

dF

0-4
5 - 45
0-5
0-5
0.05 - 0.2
0 - 20
Yes/No
110 - 180
100 - 170
0- 1.5
0- 1.5
60 - 300

CCN POINT
Z GAIN
OATLCOMP
COOL FOD
MLV SEL
MOTRMAST
HPSP
CMPA1 ENA
CMPA2ENA
CMPB1ENA
CMPB2ENA
CSB_A1EN
CSB_A2EN
CSB_B1EN
CSB B2EN
REVR VER
HSST_ME

dF
sec

0-4
80- 120
Yes/No
Yes/No
45-600
10-600

1
0
0
0
0

UNITS

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- CONFIGURATION (cont)
ITEM

EXPANSION

BP
-_BP.CF
-_BP.RT
-_BP.P
-_BP.I
_BP.D
-_BP.SO
_BP.MN
_BP.MX
_BP.FS
_BP.MT
-_BP.S
-_BP.R
-_BP.SP
-_BP.P1
-_BP.P2
-_B. CFG
-_B.CFG-_BP.SL
-_B.CFG-_BP. TM
-_B.CFG-_BP.ZG
-_B.CFG-_BP.HP
-_B.CFG-_BP.LP

BUILDING PRESS, CONFIG
Building Press, Config
Bldg.Pres.PID Run Rate
Bldg. Press, Prop, Gain
Bldg.Press.lnteg.Gain
Bldg.Press.Deriv.Gain
BP Setpoint Offset
BP VFD Minimum Speed
BP VFD Maximum Speed
VFD/Act. Fire Speed/Pos.
Power Exhaust Motors
Building Pressure Sensor
Bldg Press (+/-) Range
Building Pressure Setp.
Power Exhaust On Setp.1
Power Exhaust On Setp.2
BP ALGORITHM CONFIGS
Modulating PE AIg. Slct.
BP PID Evaluation Time
BP Threshold Adjustment
High BP Level
Low BP Level

D.LVT
-_L.H.ON
-_H.H.ON
-_L.H.OF
-_L.C.ON
-_H.C.ON
-_L.C.OF
-_C. T.LV
-_H. T.LV
-_C. T. TM
-_H. T. TM

COOL/HEAT SETPT. OFFSETS
Dmd Level Lo Heat On
Dmd Level(+) Hi Heat On
Dmd Level(-) Lo Heat Off
Dmd Level Lo Cool On
Dmd Level(+) Hi Cool On
Dmd Level(-) Lo Cool Off
Cool Trend Demand Level
Heat Trend Demand Level
Cool Trend Time
Heat Trend Time

DMD.L
-_DM.L.S
-_D.L.20
-_SH. NM
-_SH.DL
-_SH. TM
-_D.L.Sl
-_D.L.S2

DEMAND LIMIT CONFIG.
Demand Limit Select
Demand Limit at 20 ma
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time
Demand Limit Sw.1 Setpt.
Demand Limit Sw.2 Setpt.
INDOOR AIR QUALITY CFG.
DCV ECONOMIZER SETPOINTS
Economizer Min.Position
IAQ Demand Vent Min.Pos.
AIR QUALITY CONFIGS
IAQ Analog Sensor Config
IAQ 4-20 ma Fan Config
IAQ Discrete Input Config
IAQ Disc.In. Fan Config
OAQ 4-20ma Sensor Config
AIR QUALITY SETPOINTS
IAQ Econ Override Pos.
Diff.Air Quality LoLimit
Diff.Air Quality HiLimit
DAQ PPM Fan Off Setpoint
DAQ PPM Fan On Setpoint
DiE AQ Responsiveness
OAQ Lockout Value
User Determined OAQ
AIR QUALITY SENSOR RANGE
IAQ Low Reference
IAQ High Reference
OAQ Low Reference
OAQ High Reference
IAQ PRE-OCCUPIED PURGE
IAQ Purge
IAQ Purge Duration
IAQ Purge LoTemp Min Pos
IAQ Purge HiTemp Min Pos
IAQ Purge OAT Lockout
DEHUMIDIFICATION
CONFIG.
Dehumidification Config
Dehumidification Sensor
Econ disable in DH mode?
Vent Reheat Setpt Select
Vent Reheat RAT offset
Vent Reheat Setpoint
Dehumidify Cool Setpoint
Dehumidify RH Setpoint

IAQ
-_DCVC
-_DCVC-_EC.MN
-_DCV C-4AQ.M
-_AQ.CF
-_A Q.CF-dQ.A. C
-_AQ.CF-dQ.A.F
-_AQ.CF-dQ.L C
-_AQ.CF-dQ.LF
-_AQ.CF-_OQ.A.C
-_AQ.SP
-_A Q.SP-dQ. O.P
-_AQ.SP-_DAQ.L
-_AQ.SP-_DAQ.H
-_AQ.SP-_D.F. OF
-_AQ.SP-_D.F. ON
-_AQ.SP-dAQ.R
-_AQ.SP-_OAQ.L
-_AQ.SP-_OAQ. U
-_AQ.S.R
-_AQ.S.R-dQ.R.L
-_AQ.S.R-dQ.R.H
-_AQ.S.R-_OQ.R.L
-_AQ.S.R-_OQ.R.H
-dAQ.P
-dAQ.P-dQ.PG
-dAQ.P-dQ.P. T
-dAQ.P-dQ.P.L
-dAQ.P-dQ.P.H
-_IA Q.P-_IQ. L 0
DEHU
-_D.SEL
-_D.SEN
-_D.EC.D
-_D. V CF
-_D. V RA
-_D. V HT
-_D.C.SP
-_D.RH.S

RANGE
0-3
5-120
0-5
0-2
0-5
0.0 - 0.5
0-1 O0
0-100
0-100
1-2
Enable/Dsable
0 - 1.00
-0,25 -> 0.25
O- 100
O- 100
1-3
0-10
0.1 - 10.0
0 - 1.000
0 - 1.000

- 3 (multi-text strings)
- 100
- 99
- 60
- 120
- 100
- 100

-4
-2
-2
-2
-2

(multi-text
(multi-text
(multi-text
(multi-text
(multi-text

DEFAULT

"H20
%
%

BLDG CFG
BPIDR-ATE
BLDGP PG
BLDGP IG
BLDGP_DG
BPSO
BLDGPMIN
BLDGPMAX
BLDGPFSO
PWRM
BPSENS
BP RANGE
BP,SP
PES1
PES2

o
lO
o.5
o.5
o.3
o.o5
lO
1oo
1oo
1
Dsable
0.25
0.05
35
75

BPSELECT
BPPERIOD
BPZ GAIN
BPHPLVL
BPLPLVL

1
1
1
0.05
0.04

29,64,65
64,65
64,65
64,65
64,65
64,65
64,65
64,65
64,65
64,65
64,65
64,65
29,64,65
29,64,65
29,64,65
64,65
64,65
64,65
64,65
64,65
64-66

DMDLHON
DMDHHON
DMDLHOFF
DMDLCON
DMDHCON
DMDLCOFF
CTRENDLV
HTRENDLV
CTRENDTM
HTRENDTM

1.5
0.5
1
1.5
0.5
1
0.1
0.1
120
120

27,28,52
27,28,52
27,28,52
27,28,52
27,28,52
27,28,52
52
52
52
52

%
min
%
%

DMD CTRL
DMT2-0MA
SHED NUM
SHED DEL
SHED TIM
DLSWSP1
DLSWSP2

o
lOO
o
o
6O
8o
5o

31,35,48,49,98
31,49
49
49
49
31,49
31,49

%
%

ECONOMIN
IAQMINP

AF
AF
AF
AF
AF
AF
AF
AF
sec
sec

0 - 100
0 - 100
0
0
0
0
0

CCN POINT

min

-1 - 2
0.5 - 20.0
0,5-2
-1 - 2
0.5 - 20.0
0.5 - 2
0.1 -5
0.1 -5
30 - 600
30 - 600
0
0
0
0
0
0
0

UNITS

%

o
o
o
o
o

32,67,69,70
32,68-70
31,35,67,69,70
32,68-70
35,68-70

IAQOVPOS
DAQ_LOW
DAQ_HIGH
DAQFNOFF
DAQFNON
IAQREACT
OAQLOCK
OAQ USER

lOO
1oo
7oo
2oo
4oo
o
o
4oo

32,67,69,70,98
68-70
32,68-70
32,68-70
32,68-70
69,70
69,70
32,69,70

IAQREFL
IAQREFH
OAQREFL
OAQREFH

o
2000
o
2000

32,69,70
32,69,70
69,70
69,70

IAQPURGE
IAQPTIME
IAQPLTMP
IAQPHTMP
IAQPNTLO

No

min
%
%
dF

15
10
35
5O

69,70
69,70
69,70
69,70
69,70

AF
dF
dF
%

DHSELECT
DHSENSOR
DHECDISA
DHVHTCFG
DHVRAOFF
DHVHT SP
DHCOOLSP
DHRELHSP

o
1
Yes
o
o
70
45
55

69-71
69,70
69,70
70,71
70,71
70,71
70,71
70,71

%

0-5000
0-5000
0-5000
0-5000
Yes/No
5-60
0-100
0-100
35-70
0-2 (multi-text strings)
1-2 (multi-text strings)
Yes/No
0-1 (multi-text strings)
0-8
55 -95
40 -55
10-90

145

29,31,32,67-70
29,31,67-70

IAQANCFG
IAQANFAN
IAQINCFG
IAQINFAN
OAQANCFG

strings)
strings)
strings)
strings)
strings)

0-100
0-1000
100-2000
0-2000
0-2000
-5-5
0-2000
0-5000

PAGE NO.

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- CONFIGURATION (cont)
ITEM

EXPANSION

CCN
-_CCNA
-_CCNB
-_BAUD
-_BROD
-_BROD-_TM.DT
-_BROD-_OA T.B
-_BROD-_ORH.B
-_BROD-_OAQ.B
-_BROD-_G.S.B
-_BROD-_B.ACK
-_SC.OV
-_SC. OV-_SCH.N
-_SC. OV-_HOL. T
-_SC. OV-_O. T.L.
-_SC. OV-_OVEX
-_SC. OV-_SPT.O
-_SC. OV-_ T58. 0
-_SC. OV-_GL.OV

CCN CONFIGURATION
CCN Address
CCN Bus Number
CCN Baud Rate
CCN BROADCST DEFINITIONS
CCN Time/Date Broadcast
CCN OAT Broadcast
CCN OARH Broadcast
CCN OAQ Broadcast
Global Schedule Broadcst
CCN Broadcast Ack'er
CCN SCHEDULES-OVERRIDES
Schedule Number
Accept Global Holidays?
Override Time Limit
Timed Override Hours
SPT Override Enabled ?
T58 Override Enabled ?
Global Sched. Override ?

ALLM
-_SP.L.O
-_SP.H.O
-_SP.L.U
-_SP.H.U
-_SA.L.O
_SA.H.O
_SA.L.U
_SA.H.U
_RA.L.O
_RA.H.O
_RA.L.U
_RA.H.U
_R.RH.L
_R.RH.H
_SP.L
_SP.H
_BP.L
_BP.H
_IAQ.H
TRIM
_SAT. T
_RAT.T
_OA T.T
_SPT. T
_C TA. T
_CTB.T
_SP.A. T
-_SP.B. T
_DP.A. T
_DP.B.T

ALERT LIMIT CONFIG.
SPT Io alert limit/occ
SPT hi alert limit/occ
SPT Io alert limit/unocc
SPT hi alert limit/unocc
EDT Io alert limit/occ
EDT hi alert limit/occ
EDT Io alert limit/unocc
EDT hi alert limit/unocc
RAT Io alert limit/occ
RAT hi alert limit/occ
RAT Io alert limit/unocc
RAT hi alert limit/unocc
RARH low alert limit
RARH high alert limit
SP low alert limit
SP high alert limit
BP Io alert limit
BP high alert limit
IAQ high alert limit
SENSOR TRIM CONFIG.
Air Temp Lvg SF Trim
RAT Trim
OAT Trim
SPT Trim
Cir A Sat.Cond.Temp Trim
Cir B Sat.Cond.Temp Trim
Suct.Press.Circ.A Trim
Suct.Press.Circ.B Trim
Dis.Press.Circ.A Trim
Dis.Press.Circ.B Trim

SW.LG
_FTS.L
_IGC.L
_RMI.L
_ECS.L
_SFS.L
_DL 1.L
_DL2.L
_IAQ.L
_FSD.L
_PRS.L
_EVC.L
_PRG.L

SWITCH LOGIC: NO / NC
Filter Status Inpt-Clean
IGC Feedback - Off
RemSw Off-Unoc-Strt-NoOv
Economizer Switch - No
Fan Status Sw. - Off
Dmd.Lmt.Sw.1 - Off
Dmd.Lmt.Sw.2 - Dehumid - Off
IAQ Disc.Input - Low
Fire Shutdown - Off
Pressurization Sw. - Off
Evacuation Sw. - Off
Smoke Purge Sw. - Off
DISPLAY CONFIGURATION
Test Display LEDs
Metric Display
Language Selection
Password Enable
Service Password

DISP
_TEST
_METR
_LANG
_PAS.E
-_PASS

RANGE

UNITS

CCN POINT

DEFAULT

PAGE NO.

CCNADD
CCNBUS
CCNBAUDD

1
o
3

71,72
71,72
71,72

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

CCNBC
OATBC
OARHBC
OAQBC
GSBC
CCNBCACK

On

Off
Off
Off
Off
Off

71,72
71,72
71,72
71,72
71,72
71,72

0 - 99
YES/NO
0-4
0-4
YES/NO
YES/NO
YES/NO

SCHEDNUM
HOLIDAYT
OTL
OVR EXT
SPT-OVER
T58-OVER
GLBLOVER

1
No
1
0
Yes
Yes
No

27-29,71,72
72
27,72
72
27,72
27,72
72

1 - 239
0 - 239
1 - 5 (multi-text

strings)

HRS
HRS

-10-245
-10-245
-10-245
-10-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
0-100
0-100
0-5
0-5
-0.25-0.25
-0.25-0.25
0-5000

dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
%
%
"H20
"H20
"H20
"H20

SPLO
SPHO
SPLU
SPHU
SALO
SAHO
SALU
SAHU
RALO
RAHO
RALU
RAHU
RRHL
RRHH
SPL
SPH
BPL
BPH
IAQH

6O
85
45
IO0
4O
IO0
4O
IO0
6O
9O
4O
IO0
0
IO0
0
2
-0.25
0.25
1200

72,73,98
72,73,99
72,73,98
72,73,99
43,72,73,99
72,73,99
72,73,99
72,73,99
72,73,99
72,73,99
72,73,99
72,73,99
72,73,99
72,73,99
73,99
73,99
73,99
73,99
73,99

-10-10
-10-10
-10-10
-10-10
-30-30
-30-30
-50-50
-50-50
-50-50
-50-50

AF
AF
AF
AF
AF
/"F
PSIG
PSIG
PSIG
PSIG

SAT_TRIM
RAT_TRIM
OAT_TRIM
SPT TRIM
SCTATRIM
SCTBTRIM
SPATRIM
SPB TRIM
DPA TRIM
DPB_TRIM

0
0
0
0
0
0
0
0
0
0

73
73
73
73
73
73
73
73
73,74
73,74

Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close

FLTSLOGC
GASFANLG
RMTINLOG
ECOSWLOG
SFSLOGIC
DMD SWl L
DMD SW2L
IAQINLOG
FSDLOGIC
PRESLOGC
EVACLOGC
PURGLOGC

Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open

74,75
74,75
31,74,75
74,75
74,75,100
31,74,75
31,74,75
31,32,74,75
74,75,99
74,75
74,75
74,75

ON/OFF
ON/OFF
0-1 (multi-text strings)
ENABLE/DISABLE
0000-9999

TEST
DISPUNIT
LANGUAGE
PASS EBL
PASSWORD

Off
Off
0
Enable
1111

74,75
74,75
74,75
74,75
74,75

146

APPENDIX A -- LOCAL DISPLAY TABLES (cont)
MODE -- TIME CLOCK
ITEM

EXPANSION

RANGE

UNITS

CCN POINT

DEFAULT

PAGE NO.

TIME
-_ HH. MM

TIME OF DAY
Hour and Minute

DATE
-_MNTH
-_DOM
-_DAY
-_ YEAR

MONTH,DATE,DAY
Month of Year
Day of Month
Day of Week
Year

SCH.L
-_PER. 1
-_PER. I-_DAYS
-_PER. I-_DAYS-_MON
-_PER. I-_DA YS-_ TUE
-_PER. I-_DAYS-_ WED
-_PER. I-_DA YS-_ THU
-_PER. I-_DAYS-_FRI
-_PER. I-_DAYS-_SAT
-_PER. I-_DAYS-_SUN
-_PER. I-_DAYS-_HOL
-_PER. I-_OCC
-_PER. 1-_UNC
Repeated for periods 2-8 ...........
HOL.L
-_HD.01
-_HD.OI-_MON
-_HD.OI-_DAY
-_HD.OI-_LEN

LOCAL TIME SCHEDULE
PERIOD 1
DAY FLAGS FOR PERIOD 1
Monday in Period
Tuesday in Period
Wednesday in Period
Thursday in Period
Friday in Period
Saturday in Period
Sunday in Period
Holiday in Period
Occupied from
Occupied to

YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
YES/NO
00:00
00:00

PER1MON
PER1TUE
PER1WED
PER1THU
PER1FRI
PER1SAT
PER1SUN
PER1HOL
PER10CC
PER1 UNC

LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 01
Holiday Start Month
Start Day
Duration (Days)

0-12
0-31
0-99

HOL_MON1
HOL_DAY1
HOL_LEN1

1 -12
1-5
1-7
0 - 90

STARTM
STARTW
STARTD
MINADD

4
1
7
6O

76,77
76,77
76,77
76,77

1 -12
1-5
1-7
0 - 90

STOPM
STOPW
STOPD
MINSUB

lO
5
7
6O

76,77
76,77
76,77
76,77

Repeated for holidays 2-30 ........
DAY.S
DS.ST
DS.ST-_ST.MN
DS.ST-_ST. WK
DS.ST-_ST.DY
DS.ST-_MIN.A
DS.SP
DS.SP-_SP.MN
DS.SP-_SP. WK
DS.SP-_SP.DY
D&SP_MIN.S

00:00

TIME

75,77

multi-text strings
0-31
multi-text strings
e.g. 2003

MOY
DOM
DOWDISP
YOCDISP

75,77
75,77
75,77
75,77

AND YEAR

27,28,75,77

DAYLIGHT SAVINGS TIME
DAYLIGHT SAVINGS START
Month
Week
Day
Minutes to Add
DAYLIGHTS SAVINGS STOP
Month
Week
Day
Minutes to Subtract

MODE -- OPERATING
ITEM
SYS.M
HVAC
CTRL
MODE
_OCC
-_ T.OVR
_DCV
_SA.R
_DMD.L
_T.C.ST
_IAQ.P
_LINK
_LOCK
_H.NUM

EXPANSION

R.CUR
HIST

EXPANSION
CURRENTLY ACTIVE ALARMS
this is a dynamic list of active alarms
Reset All Current Alarms
ALARM HISTORY
this is a record of the last 20 alarms

76,77
76,77
76,77

UNITS

CCN POINT
string
string
string

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
0-24
MODE

ITEM
CURR

76,77
76,77
76,77
76,77
76,77
76,77
76,77
76,77
76,77
76,77
76,77

MODES
RANGE

ascii string spelling out the system mode
ascii string spelling out the hvac modes
ascii string spelling out the "control type"
MODES CONTROLLING UNIT
Currently Occupied
Timed Override in Effect
DCV Resetting Min Pos
Supply Air Reset
Demand Limit in Effect
Temp.Compensated
Start
IAQ Pre-Occ Purge Active
Linkage Active - CCN
Mech.Cooling Locked Out
HVAC Mode Numerical Form

Period 1 only
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
00:00
24:00

--

MODEOCCP
MODETOVR
MODEADCV
MODESARS
MODEDMLT
MODETCST
MODEIQPG
MODELINK
MODELOCK
MODEHVAC

ALARMS
RANGE

YES/NO

UNITS

CCN POINT
strings
ALRESET
strings

147

WRITE STATUS

ram config

APPENDIX

B E CCN TABLES

All A Series units with (_l_?foFtLink TM controls have a port
for interface with the Carrier Comfort Network '_ (CCN)
system. On TB3 there is a Jll jack which can be used for
temporary connection to the CCN network or to computers
equipped with CCN software like the Service Tool. Also on
TB3 there are screw connections that can be used for more
permanent CCN connections.

In the following tables the structure of the tables which are
used with the Service Tool as well as the names and data that
are included in each table are shown. As a reference the equivalent scrolling marquee tables and names are included. There
are several CCN variables that are not displayed through the
scrolling marquee and are used for more extensive diagnostics
and system evaluations.

STATUS DISPLAY TABLES
TABLE

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

COOLING
HVAC Mode .............. :
Control Mode ........... :

ascii text strings
ascii text strings

Current Running Capacity
Cooling Control Point
Evaporator Discharge Tmp
Mixed Air Temperature

%
dF
dF
dF

CAPTOTAL
COOLCPNT
EDT
MAT

PSIG
PSIG
dF
dF

CMPA1
CSB A1
CMPA1 TG
CMPA2
CSB A2
CMPA2_TG
MLV
DPA
SP A
SCTA
SSTA

PSIG
PSIG
dF
dF

CMPB1
CSB B1
CMPB1 TG
CMPB2
CSB B2
CMPB2_TG
DPB
SP B
SCaB
SSTB

COOL_A
Compressor A1 Relay
Compressor A1 Feedback
Compressor A1 Timeguard
Compressor A2 Relay
Compressor A2 Feedback
Compressor A2 Timeguard
Minimum Load Valve
Cir A Discharge Pressure
Cir A Suction Pressure
Cir A Sat.Condensing Tmp
Cir A Sat.Suction Temp.

COOL_B
Compressor B1 Relay
Compressor B1 Feedback
Compressor B1 Timeguard
Compressor B2 Relay
Compressor B2 Feedback
Compressor B2 Timeguard
Cir B Discharge Pressure
Cir B Suction Pressure
Cir B Sat.Condensing Tmp
Cir B Sat.Suction Temp.
ECONDIAG
Economizer

Active ?

Conditions which prevent
economizer being active:
Econ Act. Unavailable?
Remote Econ. Disabled ?
DBC - OAT lockout?
DEW - OA Dewpt. lockout?
DDBC- OAT > RAT lockout?
OAEC- OA Enth Lockout?
DEC - Diff.Enth.Lockout?
EDT Sensor Bad ?
OAT Sensor Bad ?
Economizer forced ?
Supply Fan not on 30s ?
Cool Mode not in effect?
OAQ lockout in effect ?
Econ recovery hold off?

Yes/No

ECACTIVE

Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No

ECONUNAV
ECONDISA
DBC STAT
DEW STAT
DDBCSTAT
OAECSTAT
DEC STAT
EDT STAT
OAT STAT
ECONFORC
SFONSTAT
COOL OFF
OAQLOCKD
ECONHELD

ECONOMZR
Economizer
Economizer

Act.Curr.Pos.
Act.Cmd.Pos.

%
%

ECONOPOS
ECONOCMD

Economizer
Economizer

Active ?
Control Point

dF

ECACTIVE
ECONCPNT

dF
dF
dF

OAT
EDT
RETURN_T

Outside Air Temperature
Evaporator Discharge Tmp
Controlling Return Temp

148

forcible

forcible
forcible

APPENDIX

B E CCN TABLES

(cont)

STATUS DISPLAY TABLES (cont)
TABLE

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

GENERAL
Yes/No

Occupied ?

OCCUPIED

forcible

Static Pressure
Building Pressure

"H20
"H20

SP
BP

Outside Air ReI.Humidity
Return Air ReI.Humidity

%
%

OARH
RARH

forcible
forcible

Space Temperature Offset
Supply Air Setpnt. Reset
Static Pressure Reset

AF
AF

SPTO
SASPRSET
SPRESET

forcible
forcible
forcible

%

IAQ
OAQ
IAQMINOV

forcible
forcible
forcible

dF

HT STAGE
HEATCPNT

IAQ - PPM Return C02
OAQ - PPM Return C02
IAQ Min.Pos.Override
GENERIC
20 points dependent upon
the configuration of the
"generics" table in the
Service-Config section on page 155.
HEATING
HVAC Mode .............. :
Control Mode ........... :
Heat Control Type ...... :
Re-Heat Control Type
Heating Mode ........... :

ascii
ascii
ascii
ascii
ascii

text
text
text
text
text

strings
strings
strings
strings
strings

Current Heat Stage
Heating Control Point
Heat
Heat
Relay
Relay
Relay
Relay
Heat

Relay 1
Relay 2
3 Wl Gas Valve
4 W2 Gas Valve
5 Wl Gas Valve
6 W2 Gas Valve
Interlock Relay

Heat
Heat
Heat
Heat
Heat
Heat

Stage
Stage
Stage
Stage
Stage
Stage

1
2
3
4
5
6

HSl
HS2
HS3
HS4
HS5
HS6
HIR

2
2
3
3

forcible

HS1TG
HS2TG
HS3_TG
HS4_TG
HS5TG
HS6_TG

Timeguard
Timeguard
Timeguard
Timeguard
Timeguard
Timeguard

MODEDISP
System Mode ............ :
HVAC Mode .............. :
Control Mode ........... :
Currently Occupied
Timed Override in effect
DCV resetting rain pos
Supply Air Reset
Demand Limit in Effect
Temp.Compensated
Start
IAQ pre-occ purge active
Linkage Active - DAV
Mech.Cooling Locked Out
HVAC Mode Numerical Form

ascii text strings
ascii text strings
ascii text strings
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
number

MODEOCCP
MODETOVR
MODEADCV
MODESARS
MODEDMLT
MODETCST
MODEIQPG
MODELINK
MODELOCK
MODEHVAC

MODETRIP
Unoccup.
Unoccup.
Occupied
Occupied

Cool
Cool
Cool
Cool

Mode
Mode
Mode
Mode

UCCLSTRT
UCCL END
OCCLSTRT
OCCL END

Start
End
Start
End

CtI.Temp RAT,SPT or Zone

CTRWEMP

Occupied Heat Mode
Occupied Heat Mode
Unoccup. Heat Mode
Unoccup. Heat Mode
HVAC Mode ..............

OCHT END
OCHT,STRT
UCHT END
UCHT,STRT
string

End
Start
End
Start
:

ascii text strings

TEMPCTRL
dF
dF
dF
dF
dF

Evaporator Discharge Trap
Leaving Air Temperature
Mixed Air Temperature
Controlling Return Temp
Controlling Space Temp

149

EDT
LAT
MAT
RETURN T
SPACE_T-

forcible
forcible

APPENDIX

B E CCN TABLES

(cont)

STATUS DISPLAY TABLES (cont)
TABLE

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

TEMPS
dF
dF
dF
dF
^F
dF
dF
dF
dF
dF
dF
dF
dF
dF

Air Temp Lvg Supply Fan
Return Air Temperature
Outside Air Temperature
Space Temperature
Space Temperature Offset
Staged Gas LAT Sum
Staged Gas LAT 1
Staged Gas LAT 2
Staged Gas LAT 3
Staged Gas Limit Sw,Temp
Cir A Sat,Condensing Tmp
Cir B Sat,Condensing Tmp
Cir A Sat,Suction Temp,
Cir B Sat,Suction Temp,

SAT
RAT
OAT
SPT
SPTO
LAT SGAS
LATI-SGAS
LAT2SGAS
LAT23SGAS
LIMSWTMP
SCTA
SCTB
SSTA
SSTB

forcible
forcible
forcible
forcible

TSTAT
Control Mode ........... :

ascii text strings

Thermostat
Thermostat
Thermostat
Thermostat
Thermostat

On/Off
On/Off
On/Off
On/Off
On/Off

Y1
Y2
Wl
W2
G

forcible
forcible
forcible
forcible
forcible

Dirty/Clean
On/Off
Alarm/Normal
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
Yes/No
Yes/No
On/Off
On/Off
On/Off
On/Off
Alarm/Normal
Alarm/Normal
Alarm/Normal
High/Low
On/Off

FLTS
IGCFAN
FSD
G
W2
Wl
Y2
Y1
ECOSW
ECONENBL
ECOORIDE
RMTIN
SFS
DMD SWl
DMD SW2
PRES
EVAC
PURG
IAQIN
DHDISCIN

forcible

Y1 Input
Y2 Input
Wl Input
W2 Input
G Input

UINPUTS
Filter Status Input
Fan request from IGC
Fire Shutdown Switch
Thermostat G Input
Thermostat W2 Input
Thermostat Wl Input
Thermostat Y2 Input
Thermostat Y1 Input
Economizer Control Input
Remote Economizer Enable
Econo Position Override
Remote Input State
Supply Fan Status Switch
Demand Limit Switch 1
Demand Limit Switch 2
Pressurization Input
Evacuation Input
Smoke Purge Input
IAQ - Discrete Input
Dehumidify Switch Input

forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible

UOUTPUTS
FANS
Supply Fan Relay
Supply Fan VFD Speed
Supply Fan Request
Power Exhaust Relay A
Power Exhaust Relay B
Power Exhaust Relay C
Condenser Fan A
Condenser Fan B
COOLING
Compressor A1 Relay
Compressor A2 Relay
Minimum Load Valve
Compressor B1 Relay
Compressor B2 Relay
HEATING
Heat Relay 1
Heat Relay 2
Relay 3 Wl Gas Valve 2
Relay 4 W2 Gas Valve 2
Relay 5 Wl Gas Valve 3
Relay 6 W2 Gas Valve 3
Heat Interlock Relay
ECONOMIZER
Economizer Act,Curr, Pos,
Economizer Act,Cmd,Pos,
Economizer Power Relay
GENERAL OUTPUTS
Remote Alarm/Aux Relay

On/Off
0-1 O0
Yes/No
On/Off
On/Off
On/Off
On/Off
On/Off

%

SFAN RLY
SFAN VFD
SFANFORC
PEA
PEB
PE C
CO-NDFANA
CONDFANB

forcible

On/Off
On/Off
On/Off
On/Off
On/Off

CMPA1
CMPA2
MLV
CMPB1
CMPB2

On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off

HS1
HS2
HS3
HS4
HS5
HS6
HIR

forcible

ECONOPOS
ECONOCMD
ECONPWR

forcible
forcible

ALRM

forcible

0-1 O0
0-1 O0
On/Off

%
%

On/Off

150

APPENDIX

B E CCN TABLES

(cont)

SET POINT TABLE
TABLE

NAME

RANGE

UNITS

POINT NAME

DEFAULT

SET_PNT
Occupied Heat Setpoint
Occupied Cool Setpoint
Unoccupied Heat Setpoint
Unoccupied Cool Setpoint
Heat-Cool Setpoint Gap
VAV Occ. Cool On Delta
VAV Occ. Cool Off Delta
Supply Air Setpoint
Supply Air Setpoint Hi
Supply Air Setpoint Lo
Heating Supply Air Setpt
Tempering Purge SASP
Tempering in Cool SASP
Tempering in Vent Occ SASP
Tempering Vent Unocc. SASP

40-99
40-99
40-99
40-99
2-10
0 -25
1-25
45-75
45-75
45-75
80-1 O0
-20 -80
5 -75
-20-80
-20 -80

dF
dF
dF
dF
deltaF
deltaF
deltaF
dF
dF
dF
dF
dF
dF
dF
dF

OHSP
OCSP
UHSP
UCSP
HCSP GAP
VAVOCON
VAVOCOFF
SASP
SASP HI
SASP LO
SASPHEAT
TEMPPURG
TEMPCOOL
TEMPVOCC
TEMPVUNC

68
75
55
90
5
3.5
2
55
55
60
85
50
5
65
50

CONFIG TABLES
TABLE
ALARMDEF

NAME

RANGE

UNITS

DEFAULT

POINT NAME
ALRM CNT
EQP TYPE
RETRY TM
RE-ALARM
ALRM_NAM

11000000
5
10
3O
A-SERIES

Off/On
Off/On
Off/On
Off/On
Off/On

CCNBC
OATBC
OARHBC
OAQBC
GSBC

Off
Off
Off
Off
Off

1 -12
1-5
1-7
0 - 90

STARTM
STARTW
STARTD
MINADD

4
1
7
60

1 -12
1-5
1-7
0 - 90

STOPM
STOPW
STOPD
MINSUB

lO
5
7
60

o
o
o

Alarm Routing Control
Equipment Priority
Comm Failure Retry Time
Re-Alarm Time
Alarm System Name

00000000-11111111
0-7
1 - 240
1 - 255
up to 8 alphanum

CCN Time/Date Broadcast
CCN OAT Broadcast
CCN OARH Broadcast
CCN OAQ Broadcast
Global Schedule Broadcst
Daylight Savings Start:
Month
Week
Day
Minutes to Add
Daylight Savings Stop:
Month
Week
Day
Minutes to Subtract
Device Name:
Description:
Location:
Software Part Number:
Model Number:
Serial Number:
Reference Number:

A-Series
A Series Rooftop

rain
rain

BRODEFS

Ctlr-ID

CESR131343-XX-XX

HOLIDAY
HOLDY01 S
to
HOLDY30S

Broadcast Supervisory
Holiday Start Month
Start Day
Duration (days)

1-12
1-31
1-99

HOL-MON
HOL-DAY
HOL-LEN

OCCDEFCS

Occupancy Supervisory
Timed Override Hours
Period 1 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 2 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 3 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 4 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 5 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 6 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 7 DOW (MTWTFSSH)
Occupied From
Occupied To
Period 8 DOW (MTWTFSSH)
Occupied From
Occupied To

o
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo
oooooooo
o:oo
o:oo

OVR-EXT
DOWl
OCCTOD1
UNOCTOD1
DOW2
OCCTOD2
UNOCTOD2
DOW3
OCCTOD3
UNOCTOD3
DOW4
OCCTOD4
UNOCTOD4
DOW5
OCCTOD5
UNOCTOD5
DOW6
OCCTOD6
UNOCTOD6
DOW7
OCCTOD7
UNOCTOD7
DOW8
OCCTOD8
UNOCTOD8

151

APPENDIX

B E CCN TABLES

(cont)

CONFIG TABLES (cont)
TABLE

NAME

RANGE

UNITS

POINT NAME

DEFAULT

SCHEDOVR
Schedule Number
Accept Global Holidays?
Override Time Limit
Timed Override Hours
Accepting an Override:
SPT Override Enabled ?
T58 Override Enabled ?
Allowed to Broadcast a
Global Sched. Override ?

0-99
Yes/No
0-4
0-4

SCHEDNUM
HOLIDAYT
OTL
OVR EXT

0
No
1
0

Yes/No
Yes/No

SPT OVER
T58_OV E R

Yes

Yes/No

GLBLOVER

No

Occupied Heat Setpoint
Occupied Cool Setpoint
Unoccupied Heat Setpoint
Unoccupied Cool Setpoint
Heat-Cool Setpoint Gap
VAV Occ. Cool On Delta
VAV Occ. Cool Off Delta
Supply Air Setpoint
Supply Air Setpoint Hi
Supply Air Setpoint Lo
Heating Supply Air Setpt
Tempering Purge SASP

55 -80
55-80
40 -80
75-95
2-10
0-25
1-25
45-75
45-75
45-75
90-145
-20-80

OHSP
OCSP
UHSP
UCSP
HCSP GAP
VAVO CO N
VAVOCOFF
SASP
SASP HI
SASP LO
SASPHEAT
TEMPPURG

68
75
55
90
5
3.5
2
55
55
60
85
50

hours
hours

Yes

SET_PNT
dF
dF
dF
dF
deltaF
deltaF
deltaF
dF
dF
dF
dF
dF

SERVICE-CONFIG
TABLE

NAME

RANGE

TABLES
UNITS

POINT NAME

DEFAULT

ALLM
SPT Io alert limit/occ
SPT hi alert limit/occ
SPT Io alert limit/unocc
SPT hi alert limit/unocc
EDT Io alert limit/occ
EDT hi alert limit/occ
EDT Io alert limit/unocc
EDT hi alert limit/unocc
RAT Io alert limit/occ
RAT hi alert limit/occ
RAT Io alert limit/unocc
RAT hi alert limit/unocc
RARH low alert limit
RARH high alert limit
SP low alert limit
SP high alert limit
BP Io alert limit
BP high alert limit
IAQ high alert limit

-10-245
-10-245
-10-245
-10-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
0-100
0-100
0-5
0-5
-0.25-0.25
-0.25-0.25
0-5000

Building Press. Config
Bldg.Pres.PID Run Rate
Bldg. Press. Prop. Gain
Bldg.Press.lnteg.Gain
Bldg.Press. Deriv.Gain
BP Setpoint Offset
BP VFD Minimum Speed
BP VFD Maximum Speed
VFD/Act. Fire Speed/Pos.
Power Exhaust Motors
O=None,l=4 Mtr, 2=6 Mtr
Building Pressure Sensor
Bldg Press (+/-) Range
Building Pressure Setp.
Power Exhaust On Setp.1
Power Exhaust On Setp.2
Modulating PE AIg. Slct.
BP PID Evaluation Time
BP Threshold Adjustment
High BP Level
Low BP Level

dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
%
%
"H20
"H20
"H20
"H20

SPLO
SPHO
SPLU
SPHU
SALO
SAHO
SALU
SAHU
RALO
RAHO
RALU
RAHU
RRHL
RRHH
SPL
SPH
BPL
BPH
IAQH

60
85
45
100
40
100
40
100
60
90
40
100
0
1O0
0
2
-0.25
0.25
1200

0-3
5-120
0-5
0-2
0-5
0.0 - 0.5
0-1 O0
0-1 O0
0-1 O0
0-2

BLDG CFG
BPIDR-ATE
BLDGP PG
BLDGP IG
BLDGP DG
BPSO
BLDGPMIN
BLDGPMAX
BLDGPFSO
PWRM

o
lO
0.5
0.5
0.3
o.o5
lO
1oo
lOO
1

Enable/Disable
0-1
-0.25 -> 0.25
0-1 O0
0-1 O0
1-3
0-10
0.1-10
0-1
0-1

BPSENS
BP RANGE
BPSP
PES1
PES2
BPSELECT
BPPERIOD
BPZ GAIN
BPHPLVL
BPLPLVL

Dsable
0.25
0.05
35
75
1
1
1
0.05
0.04

BP

152

"H20
%
%
min

APPENDIX

B E CCN TABLES

SERVICE-CONFIG
TABLE

NAME

(cont)

TABLES (cont)
RANGE

UNITS

POINT NAME

DEFAULT

COOL
Capacity Threshold Adjust
Compressor Lockout Temp
Fan-off Delay, Mech Cool
Minimum Load Valve?
Motor Master Control ?
Head Pressure Setpoint
Enable Compressor A1
Enable Compressor A2
Enable Compressor B1
Enable Compressor B2
CSB A1 Feedback Alarm
CSB A2 Feedback Alarm
CSB B1 Feedback Alarm
CSB B2 Feedback Alarm
Rev. Rotation Verified ?
Hi SST Alert Delay Time

-10 -> 10
-20 -> 55
0-600
Yes/No
Yes/No
80-150
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Enable/Disable
Yes/No
5-30

Dehumidification Config
Dehumidification Sensor
Econ disable in DH mode?
Vent Reheat Setpt Select
Vent Reheat RAT offset
Vent Reheat Setpoint
Dehumidify Cool Setpoint
Dehumidify RH Setpoint

0-2
1-2
Yes/No
0-1
0-8
55-95
40 -55
10-90

Metric Display
Language Selection
Password Enable
Service Password
Contrast Adjustment
Brightness Adjustment

Off/On
0-1
Enable/Disable
0000-9999
-255 - 255
-255 - 255

Dmd
Dmd
Dmd
Dmd
Dmd
Dmd
Cool
Heat
Cool
Heat

-1 - 2
0.5 - 20.0
0.5 - 2
-1 - 2
0.5 - 20.0
0.5 - 2
0.1 -5
0.1 -5
30 - 600
30 - 600

min

Z GAIN
O-ATLCOMP
COOL FOD
MLV SEL
MOT-RMAST
HPSP
CMPA1ENA
CMPA2ENA
CMPB1ENA
CMPB2ENA
CSBA1EN
CSB A2EN
CSBB1EN
CSB B2EN
REVF{ VER
HSSTTIME

1
40
60
No
No
110
Enable
Enable
Enable
Enable
Enable
Enable
Enable
Enable
No
10

deltaF
dF
dF
%

DHSELECT
DHSENSOR
DHECONEN
DHVHTCFG
DHVRAOFF
DHVHT SP
DHCOOLSP
DHRELHSP

0
1
No
0
0
7O
45
55

DISPUNIT
LANGUAGE
PASS EBL
PASSWORD
CNTR ADJ
BRTS_ADJ

Off
0
Enable
1111
0
0

DMDLHON
DMDHHON
DMDLHOFF
DMDLCON
DMDHCON
DMDLCOFF
CTRENDW
HTRENDW
CTRENDTM
HTRENDTM

1.5
0.5
1
1.5
0.5
1
0.1
0.1
120
120

DMD CTRL
DMT2OMA
SHED NUM
SHED DEL
SHED TIM
DLSWSP1
DLSWSP2

o
1oo
o
o
6o
8o
5o

ECON ENA
ECONOMIN
ECONOMAX
ECONTRIM
ECONSEL
OAECSEL
OAENCFG
OAT LOCK
OADEWCFG
OARHSENS
ECON CTL
ECOSWCFG
EC PGAIN
ECRANGE
ECSPEED
EC DBAND
UEFC CFG
UEFCTIME
UEFCNTLO

Yes

EDRSTCFG
RTIO
LIMT
EDTRSENS

o
2
lO
Disable

dF
sec
dF

DEHU

DISP

DLVT
Level
Lo Heat On
Level(+) Hi Heat On
Level(-) Lo Heat Off
Level
Lo Cool On
Level(+) Hi Cool On
Level(-) Lo Cool Off
Trend Demand Level
Trend Demand Level
Trend Time
Trend Time

AF
AF
AF
AF
AF
AF
AF
AF
sec
sec

DMDL
Demand
Demand
Loadshed
Loadshed
Maximum
Demand
Demand

Limit Select
Limit at 20 ma
Group Number
Demand Delta
Loadshed Time
Limit Sw.1 Setpt.
Limit Sw.2 Setpt.

0-3
O- 100
0 - 99
0 - 60
O- 120
0 - 100
0 - 100

%
%
min
%
%

ECON
Economizer Installed ?
Economizer Min.Position
Economizer Max. Position
Economzr trim for sumZ ?
Econ ChangeOver Select
OA Enthalpy ChgOvr Selct
Outdr.Enth Compare Value
High OAT Lockout Temp
OA Dewpoint Temp Limit
Outside Air RH Sensor
Economizer Control Type
Economizer Switch Config
Economizer Prop.Gain
Economizer Range Adjust
Economizer Speed Adjust
Economizer Deadband
Unoc Econ Free Cool Cfg
Unoc Econ Free Cool Time
Un.Ec.Free Cool OAT Lock

Yes/No
O- 100
O- 100
Yes/No
0-3
1-5
18 - 28
55 - 120
50 - 62
Enable/Disable
1-3
0-2
0.7 - 3.0
0.5 - 5
0.1 - 10
0.1 -2
0-2
0-720
40-70

EDT Reset Configuration
Reset Ratio
Reset Limit
EDT 4-20 ma Reset Input

0-3
0-10
0 - 20
Enable/Disable

%
%

dF
dF

AF
AF
min
dF

20
98
Yes
1
2
24
60
55
Disable
1
0
1
2.5
0.75
0.5
0
120
50

EDTR

153

AF

APPENDIX

B E CCN TABLES

SERVICE-CONFIG
TABLE

NAME

(cont)

TABLES (cont)
RANGE

UNITS

POINT NAME

DEFAULT

HEAT
Heating Control Type
Heating Supply Air Setpt
Occupied Heating Enabled
MBB Sensor Heat Relocate
Fan-off Delay, Gas Heat
Fan-off Delay, Elec Heat
Staged Gas Heat Type
Max Cap Change per Cycle
S.Gas DB min.dF/PID Rate
St.Gas Temp. Dead Band
Heat Rise dF/sec Clamp
LAT Limit Config
Heat Control Prop. Gain
Heat Control Derv. Gain
Heat PID Rate Config

0-4
80-120
Yes/No
Yes/No
45-600
10-600
0-4
5 - 45
0-5
0-5
0.05 - 0.2
0 - 20
0 - 1.5
0 - 1.5
60 - 300

Economizer Min.Position
IAQ Demand Vent Min.Pos.
IAQ Analog Sensor Config
IAQ 4-20 ma Fan Config
IAQ Discrete Input Config
IAQ Disc.In. Fan Config
OAQ 4-20ma Sensor Config
IAQ Econo Override Pos.
Diff.Air Quality LoLimit
Diff. Air Quality HiLimit
DAQ PPM Fan Off Setpoint
DAQ PPM Fan On Setpoint
Diff. AQ Responsiveness
OAQ Lockout Value
User determined OAQ
IAQ Low Reference
IAQ High Reference
OAQ Low Reference
OAQ High Reference
IAQ Purge
IAQ Purge Duration
IAQ Purge LoTemp Min Pos
IAQ Purge HiTemp Min Pos
IAQ Purge OAT Lockout

0- 100
0- 100
0-4
0-2
0-2
0-2
0-2
0 - 100
0 - 1000
100 - 2000
0 - 2000
0 - 2000
-5 - 5
0 - 2000
0-5000
0 - 5000
0 - 5000
0 - 5000
0 - 5000
Yes/No
5-60
0-100
0-100
35 -70

Static Pres.VFD Control?
Static Pres.Fan Control?
Static Pressure Sensor
Static Press. Low Range
Static Press. High Range
Static Pressure Setpoint
VFD Minimum Speed
VFD Maximum Speed
VFD Fire Speed Override
Stat. Pres. Reset Config
SP Reset Ratio ("/dF)
SP Reset Limit in iwc(")
SP Reset Econo.Position
Stat.Pres.PID Run Rate
Static Press. Prop. Gain
Static Pressure Intg. Gain
Static Pressure Derv. Gain
Static Press.System Gain

No

Air Temp Lvg SF Trim
RAT Trim
OAT Trim
SPT Trim
Cir A Sat.Cond.Temp Trim
Cir B Sat.Cond.Temp Trim
Suct.Press.Circ.A Trim
Suct.Press.Circ.B Trim
Dis.Press.Circ.A Trim
Dis.Press.Circ.B Trim
Static Press. Trim (ma)
Bldg. Pressure Trim (ma)

-10 - 10
-10 - 10
-10 - 10
-10 - 10
-30 - 30
-30 - 30
-50 - 50
-50 - 50
-50 - 50
-50 - 50
-2 - 2
-2 - 2

dF

AF
AF

sec

HEATTYPE
SASPHEAT
HTOCCENA
HTLATMON
GAS FOD
ELE(7, FOD
HTSTGTYP
HTCAPMAX
HT MR DB
HT SG DB
HTSGRISE
HTLATLIM
HT_PGAIN
HT DGAIN
HT,SGPIDR

o
85
No
No
45
30
0
45
0.5
2
0.06
10
1
1
90

ECONOMIN
IAQMINP
IAQANCFG
IAQANFAN
IAQINCFG
IAQINFAN
OAQANCFG
IAQOVPOS
DAQ_LOW
DAQ HIGH
DAQFNOFF
DAQFNON
IAQREACT
OAQLOCK
OAQ USER
IAQREFL
IAQREFH
OAQREFL
OAQREFH
IAQPURGE
IAQPTIME
IAQP_MP
IAQPHTMP
IAQPNTLO

5
0
0
0
0
0
0
100
100
700
200
400
0
0
400
0
2000
0
2000
No
15
10
35
50

STATICFG
STATPFAN
SPSENS
SPLOW
SP HIGH
SP,SP
STATPMIN
STATPMAX
STATPFSO
SPRSTCFG
SPRRATIO
SPRLIMIT
ECONOSPR
SPIDRATE
STATP PG
STATP IG
STATP DG
STATP_SG

Yes
Disable
0
5
1.5
20
100
100
0
0.2
0.75
5
2
20
2
0
1

SAT_TRIM
RAT_TRIM
OAT_TRIM
SPT TRIM
SCT_,TRIM
SCTBTRIM
SPATRIM
SPB TRIM
DPA TRIM
DPB TRIM
SPMATRIM
BPMATRIM

0
0
0
0
0
0
0
0
0
0
0
0

IAQ_
%
%

%

min
%
%
dF

SP

Yes
Enable/Disable
-10 - 0
0-10
0-5
10 - 50
50 - 100
0- 100
0-4 (multi-text strings)
0 - 2.00
0 - 2.00
0- 100
1 - 200
0- 100
0 - 50
0 - 50
0 - 50

"H20
%
%
%

%
sec

No

TRIM

154

AF
AF
AF
AF
AF
AF
PSl
PSl
PSl
PSl

APPENDIX

B E CCN TABLES

SERVICE-CONFIG
TABLE

NAME

(cont)

TABLES (cont)
RANGE

UNITS

POINT NAME

DEFAULT

SWLG
Filter Status Inpt-Clean
IGC Feedback - Off
RemSw Off-Unoc-Strt-NoOv
Economizer Switch - No
Fan Status Sw. - Off
Dmd.Lmt.Sw.1 - Off
Dmd.Lmt.-Dehumid
- Off
IAQ Disc.Input - Low
Fire Shutdown - Off
Press. Switch - Off
Evacuation Sw. - Off
Smoke Purge Sw. - Off

Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close
Open/Close

FLTSLOGC
GASFANLG
RMTINLOG
ECOSWLOG
SFSLOGIC
DMD SWl L
DMD SW2L
IAQINLOG
FSDLOGIC
PRESLOGC
EVACLOGC
PURGLOGC

Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open
Open

Machine Control Type
Fan Mode (O=auto, l=cont)
Remote Switch Config
CEM Module installed
Temp.Cmp.Strt.Cool Factr
Temp.Cmp.Strt.Heat
Factr
Fan fail shuts down unit
Fan Stat Monitoring Type
VAV Unocc.Fan Retry time
Unit Size (20-60)
20,25,27,30,35,40,50,60
Disch. Press. Transducer
Suct. Pres. Trans. Type
Refrig: 0=R22 1=R410A
Cnd HX Typ:O=RTPF I=MCHX
MAT Calc Config
Reset MAT Table Entries?
MAT Outside Air Default
Altitude ........ in feet:
Startup Delay Time
TSTAT-Both Heat and Cool
Auxiliary Relay Config
Space Temp Sensor
Space Temp Offset Sensor
Space Temp Offset Range
Return Air RH Sensor
Filter Stat.Sw.Enabled ?

1-6
0-1
0-3
Yes/No
0-60
0-60
Yes/No
0-2
0-720
20-60

CTRLTYPE
FAN MODE
RMT/NCFG
CEM BRD
TCSTCOOL
TCSTHEAT
SFS SHUT
SFS MON
SAMPMINS
UNITSIZE

4
1
0
No
0
0
No
0
5O
2O

POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT

8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8

UNIT

generics
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20

Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition
Definition

min
min

min
TONS

Yes/No
0-1
0-1
0-1
0-2
Yes/No
0-1 O0
0-60000
0-900
Yes/No
0-3
Enable/Disable
Enable/Disable
1 -10
Enable/Disable
Enable/Disable
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR
CHAR

ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII
ASCII

155

%
sec

^F

DP TRANS
SPXRTYPE
REFRIG T
COILTYPE
MAT SEL
MATRESET
MATOAPOS
ALTITUDE
DE LAY
TSTATALL
AUXRELAY
SPTSENS
SPTOSENS
SPTO RNG
RARH-SENS
FLTS ENA
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT
POINT

01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20

No

o

1
No
2O
0
0
No
0
Disable
Disable
5
Disable
Disable

APPENDIX

B E CCN TABLES

MAINTENANCE
TABLE

(cont)

DISPLAY TABLES

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

ALARMS01

follow same format
ALARMS02
ALARMS03
ALARMS04
ALARMS05

Active Alarm

ascii
ascii

ALARM_01

Active Alarm

ascii
ascii

ALARM_02

Active Alarm

ascii
ascii

ALARM_03

Active Alarm

ascii
ascii

ALARM_04

Compressor A1 Relay
Compressor A1 Feedback
Curr.Sens.Brd. A1 Status
CSB A1 Feedback Alarm
Comp A1 Locked Out ?
Compressor A1 Strikes
Enable Compressor A1

On/Off
On/Off
ascii
Enable/Disable
Yes/No

CMPA1
CSB A1
CSB_,IASC
CSB A1EN
CMPA1LOK
CMPA1STR
CMPA1ENA

config

Compressor A2 Relay
Compressor A2 Feedback
Curr.Sens.Brd. A2 Status
CSB A2 Feedback Alarm
Comp A2 Locked Out ?
Compressor A2 Strikes
Enable Compressor A2

On/Off
On/Off
ascii
Enable/Disable
Yes/No

CMPA2
CSB A2
CSB_,2ASC
CSB A2EN
CMPA2LOK
CMPA2STR
CMPA2ENA

config

Compressor B1 Relay
Compressor B1 Feedback
Curr.Sens.Brd. B1 Status
CSB B1 Feedback Alarm
Comp B1 Locked Out ?
Compressor B1 Strikes
Enable Compressor B1

On/Off
On/Off
ascii
Enable/Disable
Yes/No

CMPB1
CSB B1
CSBB1ASC
CSB B1EN
CMPB1LOK
CMPB1STR
CMPB1ENA

config

Compressor B2 Relay
Compressor B2 Feedback
Curr.Sens.Brd. B2 Status
CSB B2 Feedback Alarm
Comp B2 Locked Out ?
Compressor B2 Strikes
Enable Compressor B2

On/Off
On/Off
ascii
Enable/Disable
Yes/No

CMPB2
CSB B2
CSBB2ASC
CSB B2EN
CMPB2LOK
CMPB2STR
CMPB2ENA

config

Active Demand Limit
Percent Total Capacity
Demand Limit Select
Demand Limit Switch 1
Demand Limit Switch 2
Demand Limit Sw.1 Setpt.
Demand Limit Sw.2 Setpt.

0-100
0-100
0-3
On/Off
On/Off
0-100
0-100

%
%

4-20 ma Demand Signal
Demand Limit at 20 ma

4-20
0-100

%

CCN Loadshed Signal
Loadshed Group Number
Loadshed Demand Delta
Maximum Loadshed Time

0-99
0 -99
0-60
0-120

%
min

for...

COMPRESR

Enable/Disable

Enable/Disable

Enable/Disable

Enable/Disable

config

config

config

config

DMANDLIM

156

%
%

ma

DEM LIM
CAPTOTAL

forcible

DMD_CTRL

config
forcible
forcible
config
config
forcible
config

DMD SW1
DMD SW2
DLS'_SP1
DLSWSP2
DMDLMTMA
DMT20MA
DL STAT
SHED NUM
SHED DEL
SHEDTIM

config
config
config

APPENDIX

B E CCN TABLES

MAINTENANCE
TABLE

(cont)

DISPLAY TABLES (cont)

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

ECON MIN
Econo Damper Command Pos
Econo Damper Current Pos
Econo Current Min. Pos.

%
%
%

Dill.Air Quality in PPM
Econo Position Override
IAQ Min.Pos.Override
Econ Remote 10K Pot Val.
IAQ - PPM Return C02
OAQ - PPM Return C02
IAQ - Discrete Input
IAQ Demand Vent Min.Pos.
Economizer Min.Position
IAQ Analog Sensor Config
IAQ 4-20 ma Fan Config
IAQ Discrete Input Confg
IAQ Disc.In. Fan Config
IAQ Econo Override Pos.
Dill.Air Quality LoLimit
Dill.Air Quality HiLimit
DAQ PPM Fan Off Setpoint
DAQ PPM Fan On Setpoint
Diff. AQ Responsiveness
IAQ Low Reference
IAQ High Reference
OAQ Lockout Value
OAQ 4-20ma Sensor Config
IAQ milliamps
OAQ milliamps

%

%
%

%

ma
ma

ECONOCMD
ECONOPOS
ECMINPOS
DAQ
ECOORIDE
IAQMINOV
ECON POT
IAQ
OAQ
IAQIN
IAQMINP
ECONOMIN
IAQANCFG
IAQANFAN
IAQINCFG
IAQINFAN
IAQOVPOS
DAQ LOW
DAQ HIGH
DAQFNOFF
DAQFNON
IAQREACT
IAQREFL
IAQREFH
OAQLOCK
OAQANCFG
IAQ MA
OAQMA

forcible

forcible
forcible
forcible
forcible
forcible
forcible
config
config
config
config
config
config
config
config
config
config
config
config
config
config
config
config

EC_DIAG
Economizer

Active ?

Conditions which prevent
economizer being active:
Econ Act. Unavailable?
Remote Econ. Disabled ?
DBC - OAT lockout?
DEW - OA Dewpt. lockout?
DDBC- OAT > RAT lockout?
OAEC- OA Enth Lockout?
DEC - Diff.Enth.Lockout?
EDT Sensor Bad ?
OAT Sensor Bad ?
Economizer forced ?
Supply Fan not on 30s ?
Cool Mode not in effect?
OAQ lockout in effect ?
Econ recovery hold off?

Yes/No

ECACTIVE

Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No
Yes/No

ECONUNAV
ECONDISA
DBC STAT
D EW- STAT
DDBCSTAT
OAECSTAT
DEC STAT
EDT STAT
OAT STAT
ECONFORC
SFONSTAT
COOL OFF
OAQLOCKD
ECONHELD
OAT
OADEWTMP
OARH
OAE

Outside Air Temperature
OutsideAir DewPoint Temp
Outside Air ReI.Humidity
Outdoor Air Enthalpy

dF
dF
%

Return Air Temperature
Return Air ReI.Humidity
Return Air Enthalpy

dF
%

RAT
RARH
RAE

forcible
forcible

High OAT Lockout Temp
Econ ChangeOver Select
OA Enthalpy ChgOvr Selct
Outdr.Enth Compare Value
OA Dewpoint Temp Limit

dF

dF

OAT LOCK
ECON SEL
OAEC SEL
OAEN CFG
OADE_/CFG

config
config
config
config
config

%
%
dF
dF

SFAN
ECONOCMD
ECONOPOS
EDT
ECONCPNT

Supply Fan State
Economizer Act.Cmd.Pos.
Economizer Act.Curr.Pos.
Evaporator Discharge Tmp
Economizer Control Point

^F

EDT Trend in degF/minute
Economizer Prop.Gain
Economizer Range Adjust
Economizer Speed Adjust
Economizer Deadband
Economizer Timer

^F
^F
sec

157

EDTTREND
EC PGAIN
EC RANGE
EC SPEED
EC DBAND
ERATETMR

forcible
forcible

forcible

config
config
config
config
config

APPENDIX

B E CCN TABLES

MAINTENANCE
TABLE

(cont)

DISPLAY TABLES (cont)

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

ENTHALPY
Outdoor Air Enthalpy
Outside Air Temperature
Outside Air ReI.Humidity
Outside Air RH Sensor
OA Dewpoint Temp Limit
OutsideAir DewPoint Temp
OutsideAir Humidty Ratio
OA H20 Vapor Sat.Pressur
OA H20 PartiaI.Press.Vap
Return Air
Return Air
Controlling
Return Air
Return Air
Return Air

dF
%
dF
dF
"Hg
"Hg

Enthalpy
Temperature
Return Temp
ReI.Humidity
Temp Sensor
RH Sensor

dF
dF
%

Altitude ........ in feet:
Atmospheric Pressure

"Hg

OAE
OAT
OARH
OARHSENS
OADEWCFG
OADEWTMP
OA HUMR
OAPWS
OA_PWS
RAE
RAT
RETURN_T
RARH
RATSENS
RARHSENS
ALTITUDE
ATMOPRES

forcible
forcible
config
config

forcible
forcible
forcible
config
config
config
config

LINKDATA
Supervisory Element #
Supervisory Bus
Supervisory Block Number
Average Occup. Heat Stp.
Average Occup. Cool Stp.
Average Unocc. Heat Stp.
Average Unocc. Cool Stp.
Average Zone Temperature
Average Occup. Zone Temp
Linkage System Occupied?
Next Occupied Day
Next Occupied Time
Next Unoccupied Day
Next Unoccupied Time
Last Unoccupied Day
Last Unoccupied Time

dF
dF
dF
dF
dF
dF

SUPE-ADR
SUPE-BUS
BLOCKNUM
AOHS
AOCS
AUHS
AUCS
AZT
AOZT
LOCC
LNEXTOCD
LNEXTOCC
LNEXTUOD
LNEXTUNC
LLASTUOD
LLASTUNC

MILLIAMP
ma
ma
ma
ma
ma
ma
ma
ma
ma

IAQ milliamps
OAQ milliamps
SP Reset milliamps
4-20 ma Demand Signal
EDT Reset milliamps
OARH milliamps
RARH milliamps
BP milliamps
SP milliamps

IAQ MA
OAC_ MA
SPRST MA
DMDLMTMA
EDTRESMA
OARH MA
RARH MA
BPM, _,
SPMA

MODES
System Mode ............ :
HVAC Mode .............. :
Control Mode ........... :
Currently Occupied
Timed Override in effect
DCV resetting min pos
Supply Air Reset
Demand Limit in Effect
Temp.Compensated Start
IAQ pre-occ purge active
Linkage Active - DAV
Mech.Cooling Locked Out
HVAC Mode Numerical Form

ascii text strings
ascii text strings
ascii text strings
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
0-24

MODEOCCP
MODETOVR
MODEADCV
MODESARS
MODEDMLT
MODETCST
MODEIQPG
MODELINK
MODELOCK
MODEHVAC

OCCDEFME
Current Day, Time & Date:
Occupancy Controlled By:

Currently Occupied
Current Occupied Time
Current Unoccupied Time
Next Occupied Day & Time
Next Unocc. Day & Time
Last Unocc. Day & Time
Current Occup. Period #
Timed-Override in Effect
Timed-Override Duration

ascii date & time
ascii text
ascii text
ascii text
Yes/No

Yes/No
hours

158

TIMEDATE
OCDFTXT1
OCDFTXT2
OCDFTXT3
MODE OCC
STRTTIME
ENDTIME
NXTOC DT
NXTUN DT
PRVUN DT
PER N(D
OVEF{LAST
OVR HRS

forcible

APPENDIX
B E CCN TABLES (cont)
MAINTENANCE DISPLAY TABLES (cont)
TABLE

DISPLAY NAME

RANGE

UNITS

POINT NAME

WRITE STATUS

PRESBLDG
"H20
%

Building Pressure
Econo Damper Current Pos
Power Exhaust Stage A
Power Exhaust Stage B
Power Exhaust Stage C
BP Load Factor
BP Rise Per Stage
BP PID/Integral Term
BP PID Threshold
BP Deadband
Building Pressure Error
Rate of Chng of BPERROR
High BP Override
Low BP Override

BP
ECONOPOS
PEA
PEB
PE_C
BPSMZ
BPRISE
BPINT
BPZ
BPY
BPERROR
BPRATE
BPHPOVRD
BPLPOVRD

config
config
config
config
config
config
config

SP
SFANVFD
SPSP
SPRESET

config
forcible

PRESDUCT
Static Pressure
Supply Fan VFD Speed

"H20
%
"H20

Static Pressure Setpoint
Static Pressure Reset
STAGEGAS
Heating Mode ........... :
Requested Heat Stage
Heating Control Point

HT STAGE
HEATCPNT

Staged Gas LAT Sum
Staged Gas LAT 1
Staged Gas LAT 2
Staged Gas LAT 3
Staged Gas Limit Sw.Temp
Heat PID Timer
Staged Gas Capacity Calc
Current Running Capacity
Proportional Cap. Change
Derivative Cap. Change
Maximum Heat Stages
Hi Limit Switch Tmp Mode
LAT Cutoff Mode
Capacity Clamp Mode

dF
dF
dF
dF
dF
%
%

LAT SGAS
LAT_SGAS
LAT2SGAS
LAT3SGAS
LIMSWTMP
HTSGTIMR
HTSGCALC
HTSGCAP
HTSGP
HTSG D
HTMAXSTG
LIMTMODE
LATCMODE
CAPMODE

Compressor
Compressor
Compressor
Compressor

A1
A2
B1
B2

Run
Run
Run
Run

hours
hours
hours
hours

H R A1
HRA2
HRB1
HR_B2

config
config
config
config

Compressor
Compressor
Compressor
Compressor

A1
A2
B1
B2

Starts
Starts
Starts
Starts

CYA1
CYA2
CYB1
CY_B2

config
config
config
config

sec

STRTHOUR
Hours
Hours
Hours
Hours

SUMZ
dF
dF
dF
dF
dF
%

Cooling Control Point
Mixed Air Tempe ratu re
Evaporator Discharge Tmp
Return Air Temperature
Outside Air Temperature
Econo Damper Current Pos

COOLCPNT
MAT
EDT
RAT
OAT
ECONOPOS

Capacity Threshold Adjst
Capacity Load Factor
Next Stage EDT Decrease
Next Stage EDT Increase
Rise Per Percent Capacity
Cap Deadband Subtracting
Cap Deadband Adding
Cap Threshold Subtracting
Cap Threshold Adding
High Temp Cap Override
Low Temp Cap Override
Pull Down Cap Override
Slow Change Cap Override

On/Off
On/Off
On/Off
On/Off

Z GAIN
SMZ
ADDRISE
SUBRISE
RISE PCT
Y MI_IUS
YPLUS
ZMINUS
Z PLUS
H/TEMP
LOW TEMP
PULLDOWN
SLO CHNG

Reset All Current Alarms
Reset the Device
Local Machine Disable
Soft Stop Request
Emergency Stop
CEM AN1 1OK temp J5,1-2
CEM AN2 10K temp J5,3-4
CEM AN3 10K temp J5,5-6
CEM AN4 10K temp J5,7-8
CEM AN1 4-20 ma J5,1-2
CEM AN2 4-20 ma J5,3-4
CEM AN3 4-20 ma J5,5-6
CEM AN4 4-20 ma J5,7-8

Yes/No
Yes/No
Yes/No
Yes/No
Enable/Disable
-40 - 240
-40 - 240
-40 - 240
-40 - 240
0-20
0-20
0-20
0-20

ALRESET
RESETDEV
UNITSTOP
SOFTSTOP
EMSTOP
CEMIOK1
CEMIOK2
CEMIOK3
CEMIOK4
CEM4201
CEM4202
CEM4203
CEM4204

SYSTEM

159

dF
dF
dF
dF
ma
ma
ma
ma

config
config
config
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible
forcible

APPENDIX

B E CON TABLES

MAINTENANCE

DISPLAY TABLES (cont)

DISPLAY NAME

TABLE

(cont)

RANGE

UNITS

POINT NAME

WRITE STATUS

TESTCOOL
Compressor A1
Compressor A2
Min. Load Valve
Compressor B1
Compressor B2

Relay
Relay
(HGBP)
Relay
Relay

ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

CMPA1TST
CMPA2TST
MLV TST
CMP-B1TST
CMPB2TST

test
test
test
test
test

SFAN TST
SGVF-DTST
CNDA TST
CNDB_TST

test
test
test
test

TESTFANS
Supply Fan Relay
Supply Fan VFD Speed
Condenser Fan Circuit A
Condenser Fan Circuit B

ON/OFF
0-100
ON/OFF
ON/OFF

Requested Heat
Heat Relay 1
Heat Relay 2
Relay 3 Wl Gas
Relay 4 W2 Gas
Relay 5 Wl Gas
Relay 6 W2 Gas

OIMAX
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

HTST TST
H S1TST
HS2TST
HS3_TST
HS4_TST
HS5 TST
HS6 TST

test
test
test
test
test
test
test

Economizer Position Test
Economizer Power Test
Calibrate the Economizer?
Power Exhaust Relay A
Power Exhaust Relay B
Power Exhaust Relay C
Heat Interlock Relay
Remote Alarm/Aux Relay

ON/OFF
ON/OFF

ECONCTST
ECONPTST
ECON CAL
PE A =I-ST
PE B TST
PE C TST
HIR TST
ALR-M TST

test
test
test
test
test
test
test
test

MBB
ECB1
ECB2
SCB
CEM

ascii
ascii
ascii
ascii
ascii

MBB SW
ECB1 SW
ECB2 SW
SCBSW
CEMSW

%

TESTHEAT
Stage

Valve
Valve
Valve
Valve

2
2
3
3

TESTINDP

VERSIONS
CESR131343CESR131249CESR131249CESR131226CESR131174-

MARQUEE
CESR131171NAVIGATOR CESR130227-

version#
version#
version#
version#
version#

ascii version#
ascii version#

MARQ SW
NAVl SW

TIME SCHEDULE CONFIG TABLE
Allowable Entries: Day not selected ---0 Day selected ---1

Period
Period
Period
Period
Period
Period
Period
Period

1:
2:
3:
4:
5:
6:
7:
8:

DAY FLAGS
MTWTFSSH

OCCUPIED
TIME

UNOCCUPIED
TIME

00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000

00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00

00:00
00:00
00:00
00:00
00:00
00:00
00:00
00:00

160

APPENDIX

C E VFD INFORMATION
condensation from fonning on the boards during the off mode
and is stopped by driving the speed to 0 (by sending a 4 mA
signal to the VFD).
The A Series units use ABB VFDs. The interface wiring for
the VFDs is shown in Fig. A. The VFD connects through
an isolation board to the 4 to 20 mA RCB board. Terminal
designations are shown in Table A. Configurations are shown
in Table B.

On variable air volume units with optional VFD, the supply
fan speed is controlled by a 3-phase VFD. The VFD is located
in the supply fan section behind a removable panel. The VFD
speed is controlled directly by the (_l_fortLink TM controls
through a 4 to 20 mA signal based on a supply duct pressure
sensor. The VFD has a display, which can be used for service
diagnostics, but setup of the building pressure and control loop
factors should be done through the scrolling marquee display.
The VFD is powered during normal operation to prevent

Table A -- VFD Terminal Designations
TERMINAL
Ul
V1
Wl
U2
V2
W2

FUNCTION

Three-Phase

Main Circuit Input Power Supply

Three-Phase AC Output to Motor, 0 V to
Maximum Input Voltage Level

X1-11 (GND)
X1-12 (COMMON)

Factory-supplied

X1-10 (24 VDC)
X1-13 (DI-1)

Run (factory-supplied

X1-10 (24 VDC)
X1-16 (DI-4)
X1-2 (AI-1)
X1-3 (AGND)

jumper)

Start Enable 1 (Factory-supplied jumper), When
opened the drive goes to emergency stop,
Factory wired for 4 to 20 mA remote input

TERMINAL

c3

©

jumper

Z
L9

X1

_

O
©
Cl

'7

-C3

04

-CI

m,

-C3

FZEZ
lk

_k

[]

_k

|

-->
-(.____
4 to 20 mA signal

from Comfort

Fig. A -- VFD Wiring

161

Link

,i-,

=

APPENDIX

C E VFD INFORMATION

(cont)

Table B -- VFD Configurations
PARAMETER

GROUP

Start-Up Data

PARAMETER

OVER RIDE

Accel/Decel
MOTOR

INDEX

CARRIER

DEFAULT

APPLIC MACRO

9902

USER 1

MOTOR CTRL MODE
MOTOR NOM VOLT

9904
9905

SCALAR: FREQ
460v

MOTOR NOM CURR

9906

*TBD*

MOTOR NOM FREQ
MOTOR NOM SPEED

9907

60 Hz

9908

EXT1 COMMANDS

1001

1750 rpm
DI-1

DIRECTION

1003
1301

REVERSE

MINIMUM All
MAXIMUM

1302

All

ENGLISH

20.0 %

RELAY OUTPUT 1

1401

100.0 %
STARTED

RELAY OUTPUT 2

1402

RUN

RELAY OUTPUT 3

1403

RUN ENABLE

FAULT (-1)
NOT SELECTED

START ENABLE 1

1601
1608

OVERRIDE

SEL

1701

DI-3

OVERRIDE
OVERRIDE

FREQ
SPEED

1702

60 Hz

1703

OVER PASS CODE

1704

1750 rpm
ENTERED

OVERRIDE
STOP FUNCTION

1705
2102

RAMP

ACCELER TIME 1

2202

30.0s

DECELER TIME 1

2203

SWITCHING

2606

30.0s
8 kHz

Relay Outputs

System Controls

PARAMETER
9901

Start/Stop/Dir
Analog Inputs

TITLE

LANGUAGE

FREQ

VFD Operation

E The VFD keypad is shown in Fig. B.
The function of SOFT KEYS 1 and 2 change depending on
what is displayed on the screen. The function of SOFT KEY 1
matches the word in the lower left-hand box on the display
screen. The function of SOFT KEY 2 matches the word in the
lower fight-hand box on the display screen. If the box is empty,
then the SOFT KEY does not have a function on that specific
screen. The UP and DOWN keys are used to navigate through
the menus. The OFF key is used to mm off the VFD. The
AUTO key is used to change control of the drive to automatic
control. The HAND key is used to change control of the drive
to local (hand held) control. The HELP button is used to access
the help screens.

DI-4

ON

START UP WITH ASSISTANT
-- Initial start-up has been
performed at the factory. To start up the VFD with the Start-Up
Assistant or reset the VFD with the Carrier defaults, perform
the following procedure:
1. Select MENU
displayed.
2.

Use the UP or DOWN keys to highlight ASSISTANTS
on the display screen and press ENTER (SOFT KEY 2).

3.

Use the UP or DOWN keys to highlight
and press SEL (SOFT KEY 2).

4.

The Carrier Assistant will ask questions to determine the
correct parameters for the VFD. Select the desired values
and press SAVE (SOFT KEY 2) after every change. The
process will continue until all the parameters are set.
a. The Carrier Assistant
will ask "Is this an Air
Handler or Rooftop?" Select "Rooftop."

STATUS
LED
(GREEN WHEN
NORMAL, IF FLASHING
RED, SEE
DIAGNOSTICS,)

(SOFT KEY 2). The Main menu will be

Carrier Assistant

b.

SOFT
KEY 1

The Carrier Assistant will ask "Is this a High E or
Premium E motor?" Select the correct efficiency
type.
c. If the VFD can be used with two different size
(HP) motors, then the Carrier Assistant will ask the
user to choose the proper HE Select the correct
motor horsepower.
START UP BY CHANGING
PARAMETERS
INDIVIDUALLY -- Initial start-up is performed at the factory. To start up
the VFD with by changing individual parameters, perform the
following procedure:

SOFT

1. Select MENU
displayed.

Fig. B-

VFD Keypad

162

(SOFT KEY 2). The Main menu will be

2.

Use the UP or DOWN keys to highlight PARAMETERS
on the display screen and press ENTER (SOFT KEY 2).

3.

Use the UP or DOWN keys to highlight the desired
parameter group and press SEL (SOFT KEY 2).

APPENDIX

C E VFD INFORMATION

4.

Use the UP or DOWN keys to highlight
parameter and press EDIT (SOFT KEY 2).

5.

Use the UP or DOWN
parameter.

6.

Press SAVE (SOFT KEY 2) to store the modified value.
Press CANCEL (SOFT KEY 1) to keep the previous value. Any modifications
that are not saved will not be
changed.

7.

keys to change

(cont)

the desired
AUTO_

15.0Hz

30,0 Hz

the value of the

3.7A
838 MA
I 00:0o

Choose another parameter or press EXIT (SOFT KEY 1)
to return to the listing of parameter groups. Continue until
all the parameters have been configured and then press
EXIT (SOFT KEY 1) to return to the main menu.

[ mENU

Fig. C -- Standard Display Example
To adjust the speed in HAND mode, press the UP or
DOVV2',I buttons (the reference changes flmnediately).
The
reference can be modified in the local control (HAND) mode,
and can be parameterized (using Group 11 reference select) to
also allow modification in the remote control mode.

NOTE: The current parameter value appears above the highlight parameter. To view the default parameter value, press the
UP and DOVv2',I keys shnultaneously.
To restore the default
factory settings, select the application macro "HVAC Default."

PARAMETERS
MODEThe Parameters
mode is used
to change the parameters on the drive. To change parameters,
perform the following procedure:

VFD Modes

E The VFD has several different modes for
operating, and diagnosing the VFD. The modes

configuring,
are:
• Standard Display mode -- shows drive status information and operates the drive
• Parameters mode -- edits parameter values individually
• Start-up
Assistant
mode -- guides the start-up
and
configuration
• Changed
Parameters
mode
-shows
all changed
parameters
• Drive Parameter Backup mode -- stores or uploads the
parameters
• Clock Set mode -- sets the time and date for the drive
• I/O Settings mode -- checks and edits the I/O settings

1. Select MENU
displayed.

STANDARD
DISPLAY MODE -- Use the standard display
mode to read information on the drive stares and operate the
drive. To reach the standard display mode, press EXIT until the
LCD display shows stares information as described below. See
Fig. C.
The top line of the LCD display shows the basic status
information of the drive. The HAND icon indicates that the
drive control is local from the control panel. The AUTO icon
indicates that the drive is in remote control mode, such as the
basic I/O (X1) or field bus.
The arrow icon indicates the drive and motor rotation status.
A rotating arrow (clockwise or counterclockwise)
indicates
that the drive is running and at set point and the shaft direction
is forward or reverse. A rotating blinking arrow indicates that
the drive is running but not at set point. A stationary arrow
indicates that the drive is stopped. For Carrier rooftop units, the
correct rotation is counterclockwise.

(SOFT KEY 2). The Main menu will be

2.

Use the UP or DOWN keys to highlight PARAiMETERS
on the display screen and press ENTER (SOFT KEY 2).

3.

Use the UP or DOVv2',I keys to highlight the desired
parameter group and press SEL (SOFT KEY 2).

4.

Use the UP or DOVv2',I keys to highlight
parameter and press EDIT (SOFT KEY 2).

5.

Use the UP or DOWN
parameter.

6.

Press SAVE (SOFT KEY 2) to store the modified value.
Press CANCEL (SOFT KEY 1) to keep the previous
value. Any modifications
that are not saved will not be
changed.

7.

Choose another parameter or press EXIT (SOFT KEY 1)
to return to the listing of parameter groups. Continue until
all the parameters have been configured and then press
EXIT (SOFT KEY 1) to return to the main menu.

keys to change

the desired

the value of the

NOTE: The current parameter value appears above the highlight parameter. To view the default parameter value, press the
UP and DOVv2',I keys simultaneously.
To restore the default
factory settings, select the Carrier application macro.
START-UP ASSISTANT MODE -- To use
Assistant, perform the following procedure:
1. Select MENU
displayed.

The upper right corner shows the frequency set point that
the drive will maintain.
Using parameter group 34, the middle of the LCD display
can be configured to display 3 parameter values. The default
display shows parameters 0103 (OUTPUT FREQ) in percentages, 0104 (CURRENT)
in amperes, and 0120 (AI1) in
milliamperes.
The bottom corners of the LCD display show the functions
currently assigned to the two soft keys. The lower middle
displays the current time (if configured to show the thne).

the

Start-Up

(SOFT KEY 2). The Main menu will be

2.

Use the UP or DOWN keys to highlight ASSISTANTS
on the display screen and press ENTER (SOFT KEY 2).

3.

Use the UP or DOWN keys to highlight
Drive and press SEL (SOFT KEY 2).

4.

The Start-Up Assistant will display the parameters that
need to be configured. Select the desired values and press
SAVE (SOFT KEY 2) after every change. The process
will continue until all the parameters are set. The assistant
checks to make sure that entered values are in range.

Commission

The assistant is divided into separate tasks. The user can
activate the tasks one after the other or independently.
The
tasks are typically done in this order: Application, References
1 and 2, Start/Stop Control, Protections, Constant Speeds, PID
Control, Low Noise Setup, Panel Display, Thned Functions,
and Outputs.

The first thne the drive is powered up, it is in the OFF mode.
To switch to local hand-held control and control the drive using
the control panel, press and hold the HAND button. Pressing
the HAND button switches the drive to hand control while
keeping the drive running. Press the AUTO button to switch to
remote input control. To start the drive press the HAND or
AUTO buttons, to stop the drive press the OFF button.

163

APPENDIX

C E VFD INFORMATION

5. The text "Restoring Parameters" will be displayed with a
progress indicator. To stop the process, select ABORT
(SOFT KEY 1).
6. When the download is complete, the text "Parameter
download successful" will be displayed.
7. The display will then return to the PAR BACKUP menu.
Select EXIT (SOFT KEY 1) to return to the main menu.
8. The control panel can now be disconnected from the
drive.

CHANGED PARAMETERS
MODE -- The Changed Parameters mode is used to view and edit recently changed parameters
on the drive. To view the changed parameters, perform the
following procedure:
1. Select MENU
displayed.

(SOFT KEY 2). The Mare menu will be

2.

Use the UP or DOWN keys to highlight CHANGED
PAR on the display screen and press ENTER (SOFT
KEY 2). A list of the recently changed parameters will be
displayed.

3.

Use the UP or DOWN keys to highlight the desired parameter group and press EDIT (SOFT KEY 2) to change
the parameter if desired.

4.

Press EXIT (SOFT KEY 1) to exit the Changed
ters mode.

Download Application Parameters -- To download application parameters only to the control panel from the VFD,
perform the following procedure:
1. Install the control panel with the correct parameters onto
the VFD.

Parame-

2. Select MENU (SOFT KEY 2). The Mare menu will be
displayed.
3. Use the UP or DOWN keys to highlight PAR BACKUP
on the display screen and press ENTER (SOFT KEY 2).
4. Use the UP or DOWN keys to highlight DOWNLOAD
APPLICATION and press SEL (SOFT KEY 2).
5. The text "Downloading Parameters (partial)" will be
displayed with a progress indicator. To stop the process,
select ABORT (SOFT KEY 1).
6. When the download is complete, the text "Parameter
download successful" will be displayed.
7. The display will then return to the PAR BACKUP menu.
Select EXIT (SOFT KEY 1) to return to the main menu.
8. The control panel can now be disconnected from the
drive.
CLOCK SET MODEThe clock set mode is used for
setting the date and time for the internal clock of the VFD. In
order to use the timer functions of the VFD control, the internal
clock must be set. The date is used to determine weekdays and
is visible in the fault logs.
To set the clock, perform the following procedure:
1. Select MENU (SOFT KEY 2). The Mare menu will be
displayed.
2. Use the UP or DOWN keys to highlight CLOCK SET on
the display screen and press ENTER (SOFT KEY 2). The
clock set parameter list will be displayed.
3. Use the UP or DOWN keys to highlight CLOCK VISIBILITY and press SEL (SOFT KEY 2). This parameter
is used to display or hide the clock on the screen. Use the
UP or DOWN keys to change the parameter setting. Press
OK (SOFT KEY 2) to save the configuration and return
to the Clock Set menu.

DRIVE PARAMETER BACKUP MODE -- The drive parameter back up mode is used to export the parameters from one
drive to another. The parameters can be uploaded from a VFD
to the removable control panel. The control panel can then be
transferred to another drive and the parameters downloaded into
memory.
Depending on the motor and application, there are two
options available. The first option is to download all parameters. This copies both application and motor parameters to the
drive from the control panel. This is recolmnended when using
the same application for drives of the same size. This can also
be used to create a backup of the parameters group for the
drive.
The second option downloads only the application parameters to the drive. This is recommended when using the same application for drives of different sizes. Parameters 9905, 9906,
9907, 9908, 9909, 1605, 1607, 5201, and group 51 parameters
and internal motor parameters are not copied.
Upload All Parameters -- To upload and store parameters in
the control panel from the VFD, perform the following
procedure:
1. Select MENU (SOFT KEY 2). The Main menu will be
displayed.
2. Use the UP or DOWN keys to highlight PAR BACKUP
on the display screen and press ENTER (SOFT KEY 2).
3. Use the UP or DOWN keys to highlight UPLOAD TO
PANEL and press SEL (SOFT KEY 2).
4. The text "Copying Parameters" will be displayed with a
progress indicator. To stop the process, select ABORT
(SOFT KEY 1).
5. When the upload is complete, the text "Parameter upload
successful" will be displayed.
6. The display will then return to the PAR BACKUP menu.
Select EXIT (SOFT KEY 1) to return to the main menu.
7. The control panel can now be disconnected from the
drive.

4.

Download All Parameters
-- To download all parameters
from the control panel to the VFD, perform the following
procedure:
1. Install the control panel with the correct parameters
the VFD.

(cont)

5.

onto

2. Select MENU (SOFT KEY 2). The Mare menu will be
displayed.
3. Use the UP or DOWN keys to highlight PAR BACKUP
on the display screen and press ENTER (SOFT KEY 2).
4. Use the UP or DOWN keys to highlight DOWNLOAD
TO DRIVE ALL and press SEL (SOFT KEY 2).

6.

164

Use the UP or DOWN keys to highlight SET TIME and
press SEL (SOFT KEY 2). Use the UP or DOWN keys to
change the hours and minutes. Press OK (SOFT KEY 2)
to save the configuration and return to the Clock Set
menu.
Use the UP or DOWN keys to highlight TIME FORMAT
and press SEL (SOFT KEY 2). Use the UP or DOWN
keys to change the parameter setting. Press OK (SOFT
KEY 2) to save the configuration and return to the Clock
Set menu.
Use the UP or DOWN keys to highlight SET DATE and
press SEL (SOFT KEY 2). Use the UP or DOWN keys to
change the day, month, and year. Press OK (SOFT KEY
2) to save the configuration and return to the Clock Set
menu.

APPENDIX

C E VFD INFORMATION

7.

Use the UP or DOWN keys to highlight DATE FORMAT and press SEL (SOFT KEY 2). Use the UP or
DOWN keys to change the parameter setting. Press OK
(SOFT KEY 2) to save the configuration and return to the
Clock Set menu.

The fault code on the control panel display is temporary.
Pressing the MENU, ENTER, UP button or DOWN buttons
removes the fault message. The message reappears after a few
seconds if the control panel is not touched and the fault is still
active.

8.

Press EXIT (SOFT KEY 1) twice to return to the main
menu.

ALARMS (GREEN LED FLASHING)
-- For less severe
errors, called alarms, the diagnostic display is advisory. For
these situations, the drive is simply reporting that it had detected something unusual. In these situations, the drive:

I/O SETTINGS MODE -- The FO Settings mode is used for
viewing and editing the I/O settings.
To configure the I/O settings, perform the following
procedure:
1. Select MENU (SOFT KEY 2). The Main menu will be
displayed.
2. Use the UP or DOWN keys to highlight I/O SETTINGS
on the display screen and press ENTER (SOFT KEY 2).
The I/O Settings parameter list will be displayed.
3. Use the UP or DOWN keys to highlight the desired I/O
setting and press SEL (SOFT KEY 2).
4. Use the UP or DOWN keys to select the parameter to
view. Press OK (SOFT KEY 2).
5. Use the UP or DOWN keys to change the parameter
setting. Press SAVE (SOFT KEY 2) to save the configuration. Press CANCEL (SOFT KEY 1) to keep the previous value. Any modifications that are not saved will not
be changed.
6. Press EXIT (SOFT KEY 1) twice to return to the main

•
•
•

CORRECTING
FAULTS -- The recommended
corrective
action for faults is shown in the Fault Listing Table C. The
VFD can also be reset to remove the fault. If an external source
for a start command is selected and is active, the VFD may
start immediately after fault reset.
To reset a fault indicated by a flashing red LED, turn offthe
power for 5 minutes. To reset a fault indicated by a red LED
(not flashing), press RESET from the control panel or turn off
the power for 5 minutes. Depending on the value of parameter
1604 (FAULT RESET SELECT), digital input or serial coinmunication could also be used to reset the drive. When the fault
has been corrected, the motor can be started.

Third Party Controls

E For conversion to third party
control of the VFD, perform the following procedure:
1. Remove the factory-installed jumper
Xl-13 (control of VFD start/stop).

Remove the factory-installed jumper between XI-10 and
Xl-16 and replace with a normally closed safety contact
for control of VFD start enable.

3.

Install speed signal wires
is set at the factory for
10 vdc signal is required,
above the VFD control
position to left position)
0% from 20%.

VFD Diagnostics

_

HISTORYFor reference, the last three fault codes are
stored into parameters 0401, 0412, 0413. For the most recent
fault (identified by parameter 0401), the drive stores additional
data (in parameters 0402 through 0411) to aid in troubleshooting a problem. For example, a parameter 0404 stores the motor
speed at the time of the fault. To clear the fault history (all of
Group 04, Fault History parameters), follow these steps:

between XI-10 and

2.

to AI-1 and AGND. This input
a 4 to 20 inN signal. If a 0 to
change DIP switch J1 (located
terminal strip) to OFF (right
and change parameter 1301 to

The drive

detects

error

1. In the control panel, Parameters
0401.

3.
4.

situations

•
•
•
•
•

enabling the red LED
or flashing)
setting an appropriate
(0305 to 0307)
overriding the control
fault code
stopping the motor (if
setting an appropriate
0307.

that

it has

VFD Maintenance

_ If installed in an appropriate environment, the VFD requires very little maintenance.
Table E lists the routine maintenance intervals recommended by Carrier.
HEAT SINK -- The heat sink fins accumulate dust from the
cooling air. Since a dusty sink is less efficient at cooling the
drive, overtemperamre
faults become more likely. In a normal
environment check the heat sink annually, in a dusty environment check more often.

on the drive (LED is either steady
bit in a Fault
panel display

Word

parameter

with the display of a

it was on)
bit in Fault Word parameter

buttons simultaneously.

If diagnostics
troubleshooting
has determined
that the
drive is defective
during
the warranty
period,
contact
ABB Automation Inc., at 1-800-435-7365,
option 4, option 3.
A qualified technician will review the problem with the caller
and make a determination regarding how to proceed. This may
involve dispatching a designated service station (DSS) representative from an authorized station, dispatching a replacement
unit, or advising return for repair.

The form of the display depends on the severity of the error.
The user can specify the severity for many errors by directing
the drive to ignore the error situation, report the situation as an
alarm, or report the situation as a fault.
signals

Press the UP and DOWN
Press SAVE.

CORRECTING
ALARMSTo correct alarms, first determine if the Alarm requires any corrective action (action is not
always required). Use Table D to find and address the root
cause of the problem.

the green and red LEDs on the body of the drive (located
under the keypad)
the status LED on the control panel
the control panel display
the Fault Word and Alarm Word parameter bits (parameters 0305 to 0309)

FAULTS (RED LED LIT)The VFD
detected a severe error, or fault, by:

mode, select parameter

2. Press EDIT.

and reports them using:

•
•
•

flashes the green LED on the drive (does not apply to
alarms that arise from control panel operation errors)
sets an appropriate
bit in an Alarm Word parameter
(0308 or 0309)
overrides the control panel display with the display of an
alarm code and/or name

Alarm messages disappear froln the control panel display
after a few seconds. The message returns periodically as long
as the alarm condition exists.

menu.

•

(cont)

0305-

165

APPENDIX
FAULT
CODE

C E VFD INFORMATION
Table C -- Fault Codes

FAULT NAME
IN PANEL

1

OVERCURRENT

2

DC OVERVOLT

3

DEV OVERTEMP

4
5

SHORT CIRC
OVERLOAD

6

DC UNDERVOLT

DESCRIPTION

AND RECOMMENDED

(cont)

CORRECTIVE

ACTION

Output current is excessive. Check for excessive motor load, insufficient acceleration time (parameters 2202 ACCELER TIME 1,
default 30 seconds), or faulty motor, motor cables or connections.
Intermediate circuit DC voltage is excessive. Check for static or transient over voltages in the input power supply, insufficient deceleration time (parameters 2203 DECELER TIME 1, default 30 seconds), or undersized brake chopper (if present).
Drive heat sink is overheated. Temperature is at or above 115 C (239 F). Check for fan failure, obstructions
coating on the heat sink, excessive ambient temperature, or excessive motor load.
Fault current. Check for short-circuit in the motor cable(s) or motor or supply disturbances.
Inverter overload condition. The drive output current exceeds the ratings.
Intermediate
main circuit.

circuit DC voltage is not sufficient. Check for missing phase in the input power supply, blown fuse, or under voltage on

7

All

LOSS

Analog input 1 loss. Analog input value is less than All FLT LIMIT (3021). Check source and connection
eter settings for All FLT LIMIT (3021) and 3001 AI 2002 MAXIMUM SPEED
2007 MINIMUM FREQ > 2008 MAXIMUM FREQ
2001 MINIMUM SPEED / 9908 MOTOR NOM SPEED is outside of the range: -128/+128
2002 MAXIMUM SPEED / 9908 MOTOR NOM SPEED is outside of the range: -128/+128
2007 MINIMUM FREQ / 9907 MOTOR NOM FREQ is outside of the range: - 128/+128
2008 MAXIMUM FREQ / 9907 MOTOR NOM FREQ is outside of the range: - 128/+128
Parameter values are inconsistent. Check that 2007 MINIMUM FREQ is negative, when 8123 PFA ENABLE is active.
Parameter values are inconsistent. The number of programmed PFA relays does not match with Interlock configuration, when 8123
PFA ENABLE is active. Check consistency of RELAY OUTPUT parameters 1401 through 1403, and 1410 through 1412. Check 8117
NR OF AUX MOTORS, 8118 AUTOCHANGE INTERV, and 8120 INTERLOCKS.
Parameter values are inconsistent. Check that parameter 1301 AI 1 MIN > 1302 AI 1 MAX and that parameter 1304 AI 2 MIN > 1305
AI 2 MAX.
Parameter values are inconsistent.
1511 AO2 MAX.

Check that parameter

1504 AO 1 MIN > 1505 AO 1 MAX and that parameter

1510 AO 2 MIN >

Parameter values for power control are inconsistent: Improper motor nominal kVA or motor nominal power. Check the following
parameters:
1.1<(9906MOTORNOMCURR*9905MOTORNOMVOLT*1.73/PN)<2.6
Where: PN = 1000 * 9909 MOTOR NOM POWER (if units are kW) or PN = 746
• 9909 MOTOR NOM POWER (if units are HP, e.g., in US)
Parameter values are inconsistent. Check the extension relay module for connection and 1410 through 1412 RELAY OUTPUTS
through 6 have non-zero values.
Parameter values are inconsistent.
but 9802 COMM PROT SEL = 0.

Check that a parameter

is set for field bus control (e.g., 1001 EXT1 COMMANDS

4

= 10 (COMM)),

Parameter values are inconsistent. The 9904 MOTOR CTRL MODE must = 3 (SCALAR SPEED) when 8123 PFA ENABLE activated.
Parameter values for power control are inconsistent or improper motor nominal frequency or speed. Check for both of the following:
< (60 * 9907 MOTOR NOM FREQ / 9908 MOTOR NOM SPEED < 16
0.8 < 9908 MOTOR NOM SPEED / (120 * 9907 MOTOR NOM FREQ / Motor poles) < 0.992
Override mode is enabled and PFA is activated at the same time. This cannot be done because PFA interlocks cannot be observed
the override mode.

166

in

APPENDIX

C E VFD INFORMATION

(cont)

Table D -- Alarm Codes
ALARM
CODE

ALARM NAME
IN PANEL

DESCRIPTION

2001

--

Reserved

2002

--

Reserved

2003

--

AND RECOMMENDED

CORRECTIVE

ACTION

Reserved

2004

DIR LOCK

The change in direction being attempted is not allowed, Do not attempt to change the direction of motor rotation, or Change parameter 1003 DIRECTION to allow direction change (if reverse operation is safe),

2005

I/O COMM

Field bus communication has timed out, Check fault setup (3018 COMM FAULT FUNC and 3019 COMM
FAULT TIME), Check communication settings (Group 51 or 53 as appropriate), Check for poor connections
and/or noise on line,

2006

All

LOSS

Analog input 1 is lost, or value is less than the minimum setting, Check input source and connections, Check
the parameter that sets the minimum (3021) and the parameter that sets the Alarm/Fault operation (3001),

2007

AI2 LOSS

Analog input 2 is lost, or value is less than the minimum setting, Check input source and connections, Check
parameter that sets the minimum (3022) and the parameter that sets the Alarm/Fault operation (3001),

2008

PANEL LOSS

Panel communication is lost and either the VFD is in local control mode (the control panel displays HAND), or
the VFD is in remote control mode (AUTO) and is parameterized to accept start/stop, direction or reference
from the control panel, To correct, check the communication lines and connections, Parameter 3002 PANEL
LOSS, and parameters in groups 10 COMMAND INPUTS and 11 REFERENCE SELECT (if drive operation
is REM),

2009

--

2010

MOT OVERTEMP

2011

UNDERLOAD

Motor load is lower than expected, This alarm warns that a Motor Underload fault trip may be near, Check
that the motor and drive ratings match (motor is NOT undersized for the drive), Check the settings on parameters 3013 to 3015,

2012

MOTOR STALL

Motor is operating in the stall region, This alarm warns that a Motor Stall fault trip may be near,

2013"

AUTORESET

2014"

AUTOCHANGE

2015
2016

PFA INTERLOCK
--

2017"

OFF BUTTON

2018"

PID SLEEP

This alarm warns that the PID sleep function is active, which means that the motor could
accelerate when the PID sleep function ends, To control PID sleep, use parameters
4022 through 4026 or 4122 through 4126,

2019
2020

ID RUN
OVERRIDE

The VFD is performing an ID run,
Override mode is activated,

Reserved
Motor is hot, based on either the VFD estimate or on temperature feedback, This alarm warns that a Motor
Overload fault trip may be near, Check for overloaded motor, Adjust the parameters used for the estimate
(3005 through 3009), Check the temperature sensors and Group 35 parameters,

This alarm warns that the drive is about to perform an automatic fault reset, which may start the motor, To
control automatic reset, use parameter group 31 (AUTOMATIC RESET),
This alarm warns that the PFA autochange
and the Pump Alternation macro,

function is active, To control PFA, use parameter

group 81 (PFA)

This alarm warns that the PFA interlocks are active, which means that the drive cannot start any motor (when
Autochange is used), or a speed regulated motor (when Autochange is not used),
Reserved
This alarm indicates that the OFF button has been pressed,

2021

START ENABLE 1
MISSING

This alarm warns that the Start Enable 1 signal is missing, To control Start Enable 1 function, use parameter
1608, To correct, check the digital input configuration and the communication settings,

2022

START ENABLE 2
MISSING

This alarm warns that the Start Enable 2 signal is missing, To control Start Enable 2 function, use parameter
1609, To correct, check the digital input configuration and the communication settings,

2023

EMERGENCY

STOP

Emergency stop is activated,

*This alarm is not indicated by a relay output, even when the relay output is configured
PUT = 5 (ALARM) or 16 (FLT/ALARM),

1. Remove power from drive.
Remove the cooling fan.

3.

Blow clean compressed air (not humid) from bottom to top
and shnultaneously use a vacuum cleaner at the air outlet
to trap the dust. If there a risk of the dust entering adjoining
equipment, perform the cleaning in another room.

4.

Replace the cooling fan.

5.

Restore power.

parameter

1401 RELAY OUT-

Table E -- Maintenance Intervals

Check the heat sink as follows (when necessary):
2.

to indicate alarm conditions,

MAINTENANCE

167

INTERVAL

Heat Sink Temperature
Check and Cleaning

Every 6 to 12 months (depending
on the dustiness of the environment)

Main Cooling Fan
Replacement

Every five years

Internal Enclosure Cooling
Fan Replacement

Every three years

Capacitor Change
(Frame Size R5 and R6)

Every ten years

HVAC Control Panel
Battery Change

Every ten years

APPENDIX

C E VFD INFORMATION

(cont)

MAIN FAN REPLACEMENTThe main cooling fan of
the VFD has a life span of about 60,000 operating hours at
maximum rated operating temperature and drive load. The
expected life span doubles for each 18 F drop in the fan
temperature (fan temperature is a function of ambient temperatures and drive loads).
Fan failure can be predicted by the increasing noise from
fan bearings and the gradual rise in the heat sink temperature in
spite of heat sink cleaning. If the drive is operated in a critical
part of a process, fan replacement is recolrnnended once these
symptolns
start appearing. Replacement
fans are available
from Carrier.

To replace the main fan for flame sizes R1 through R4,
perform the following (see Fig. D):
1. Remove power from drive.
2. Remove drive cover.
3.

For flame sizes R1 and R2, press together the retaining
clips on the fan cover and lift. For frame sizes R3 and R4,
press in on the lever located on the left side of the fan
mount, and rotate the fan up and out.
4. Disconnect the fan cable.
5.

Install the new fan by reversing

6.

Restore power.

Steps 2 to 4.

Fig. D -- Main Fan Replacement
(Frame Sizes R1-R4)

To replace the main fan for frame sizes R5 and R6, perform
the following (see Fig. E):
1. Remove power from drive.

Bottom View (R5)

2.
3.

Remove the screws attaching the fan.
Disconnect the fan cable.

4.

Install the fan in reverse order.

5. Restore power.
INTERNAL ENCLOSURE FAN REPLACEMENT -- The
VFD IP 54 / UL Type 12 enclosures have an additional internal
fan to circulate air inside the enclosure.
To replace the internal enclosure fan for frame sizes R1 to
R4, perform the following (see Fig. F):

Bottom View (R6)
................................................................._Y _3

1. Remove power from drive.
2. Remove the front cover.
3.

The housing that holds the fan in place has barbed retaining clips at each corner. Press all four clips toward the
center to release the barbs.

4.

When the clips/barbs
move from the drive.

5.

Disconnect

6.

Install the fan in reverse order, noting the following: the
fan airflow is up (refer to arrow on fan); the fan wire
harness is toward the front; the notched housing barb is
located in the right-rear corner; and the fan cable connects
.just forward of the fan at the top of the drive.

are free, pull the housing up to re-

the fan cable.

To replace the internal enclosure
R6, perform the following:

Fig. E -- Main Fan Replacement
(Frame Sizes R5 and R6)
CONTROL PANEL CLEANINGUse a soft damp cloth
to clean the control panel. Avoid harsh cleaners which could
scratch the display window.

fan for flame sizes R5 or

1.
2.
3.
4.

Remove power from drive.
Remove the front cover.
Lift the fan out and disconnect the cable.
Install the fan in reverse order.

5.

Restore power.

BATTERY REPLACEMENT
-- A battery is only used in assistant control panels that have the clock function available and
enabled. The battery keeps the clock operating in memory
during power interruptions. The expected life for the battery is
greater than ten years. To remove the battery, use a coin to
rotate the battery holder on the back of the control panel.
Replace the battery with type CR2032.

168

APPENDIX

C E VFD INFORMATION

(cont)

4
3
5

Fig. F-

Internal Enclosure Fan Replacement

169

APPENDIX

D E MODE SELECTION

The following section is to be used in conjunction with
Fig. 4 on page 34. To help determine why the unit controls are
in a certain mode, the progralmning logic is provided below.
The software will proceed, step by step, until a mode is
reached. If an "If" statement is true, then that mode will be entered. The "Else" statement refers to other possible choices.

--

Shut Down

HVAC mode:

("Disabled

--

") OFF

Else
") OFF}

{ If the pressurization
is in "alarm":
HVAC mode:
Else If the evacuation
is in "alarm":
HVAC mode:

--

input (Inputs'--+FIRE--+PRES)
("Pressurization

")

input (Inputs-+FIRE-+EVAO
("Evacuation

")

HVAC mode:

("Smoke

Purge

--

")}
--

{

HVAC mode:

("Disabled

--

Else If: The System Mode is TEST:
{

HVAC mode:

("Test

")}

Else If: The "soft stop" colmnand
is forced to YES:
{

HVAC mode:

("SoftStop

--

Request")}

{

HVAC mode:

("Rein.

Sw. Disable")

--

--

Else If: Configured for static pressure control
(Configuration---_SP---_SR CF
1, 2) and the static
pressure sensor (Pressures-+AIR.P--+SP)
fails:
{

HVAC mode:

("Static

Pres.Fail")

OFF}

--

{

HVAC mode:

("Fan

Status Fail ") OFF}

Else If: The unit is just waking up from a power reset
{

HVAC mode:
Else If: A compressor

{

HVAC mode:

("Starting Up
is diagnosed
("Comp.

") OFF}
")

Else The control is free to select the normal heating/
cooling HVAC modes:
{

HVAC mode:

("Off

mode.

")

("Low

Cool

")

("High

Cool

")

("Low Heat

")

("High Heat

")

("Unoee. Free Cool")

In this mode the unit will operate in cooling but
will be using the economizer for free cooling.
Entering this mode will depend on the status of the
outside air. The unit can be configured for outside
air changeover, differential dry bulb changeover,
outside air enthalpy changeover, differential
enthalpy changeover, or a custom arrangement
of enthalpy/dewpoint
and dry bulb. See the
Economizer section for further details.}

NOTE: There is also a transitional mode whereby the machine
may be waiting for relay timeguards to expire before shutting
the machine completely down:

as being "Stuck On"
Stuck On

("Vent

This is a normal heating mode when a high
heating demand exists.
HVAC mode:

Else If: Configured for supply fan status monitoring
(Configuration-cUNIT--)SFS.M
1,2) and
configured to shut the unit down on fan status fail
((bnfiguration--+UNIT--+SFS.S
= YES)

("Dehumidification")

This is a normal heating mode when a low
heating demand exists.
HVAC mode:

OFF}

("Re-Heat")

This is a normal cooling mode when a high
cooling demand exists.
HVAC mode:

Else If: The remote switch config (Configuration--+
UNIT-+RM. CF) 2; "start/stop", and the remote
input state (Inputs-+GEN.I-+REMT)=ON:

HiCool")

This is a normal cooling mode when a low cooling
demand exists.
HVAC mode:

(Service Test-+S.STP)

("Tempering

This is a normal operation mode where no heating
or cooling is required and outside air is being
delivered to the space to control IAQ levels.
HVAC mode:

") OFF}

LoCool")

The unit is operating in dehumidification
HVAC mode:

Else If: Someone changed the machine's
control type (Configuration-+UNIr_:
TYP) during
run time, a 15 second delay is called out:

("Tempering

The unit is operating in reheat mode.
HVAC mode:

Else If the smoke purge input (Inputs'--+FIRE--+PURG)
is in "alarm":

")

The economizer is at minimum vent position but
the combination of the outside air temperature and
the economizer position has dropped the supply air
temperature below the tempering cool set point.
Gas heat is used to temper the ventilation air.
HVAC mode:

--

Vent

The economizer is at minflnum vent position but
the combination of the outside-air temperature and
the economizer position has dropped the supply-air
temperature below the tempering cool set point.
Gas heat is used to temper the ventilation air.
HVAC mode:

Else If: The rooftop is not in "factory test" and a fire
smoke-control mode is "alarming":

("Tempering

The economizer is at minimum vent position but
the supply air temperature has dropped below the
tempering vent set point. Gas heat is used to
temper the ventilation air.
HVAC mode:

{ If the fire shut down input (Inputs'--cFIRE-cFSD)
is in "alarm":
("Fire

The unit is off and no operating modes are active.
HVAC mode:

--

If the System Mode is OFF:

HVAC mode:

PROCESS

HVAC mode:

")

170

("Shutting

Down

")

INDEX

Accessory
control
components
124
Accessory installation
7
Accessory Navigator TM display 4, 124
Airflow control during
fire-smoke modes
66
Alarm output
31
Alarms and alerts 93
Alert limit configuration
72
Auto view of run status 90
Basic control usage 3-6
Buikling pressure contiguration
63
Building pressure control
63
Carrier Comfort Network _v(CCN) System
CCN tables and display 5
CCN tables 148-160
Cleaning
126'
(bmJortLink TM controls
3
Complete unit stoppage
77
Compressor run hours display table 91
Compressor starts display table 91
Condenser-fan adjustment
132
Controls
7
Controls operation
4, 32-75
Controls quick start 27-29
Controls set point and configuration
log (Z-1 to (Z-5
Conventions used in this manual 3
Cool mode selection process
40
Cooling
30
Cooling control 37
Cooling mode diagnostic help 46
Crankcase heaters
7
Dehumidification and reheat 69
Demand controlled ventilation control
31
Demand limit control
31, 48
Dirty filter switch 60
Discrete switch logic configuration
74
Display configuration
74
Economizer
60
Economizer diagnostic help 63
Economizer integration with
mechanical cooling
50
Economizer operation
61
Economizer options
28
Economizer run status 90
Evacuation mode
66
Evaporator t:an 7, 130, 13l
Exhaust options 29
Factory-installed components
101
Fan status monitoring
59
Fans 30
Filter drier 139
Fire shutdown mode
66
Fire-smoke inputs 66
Four-inch filter replacement
132
Forcing inputs and outputs 90
Gas heat (48A only)
7
Gas valve adjustment (48A only) 132
Generics table 5
Head pressure control 49
Heat mode diagnostic help 52
Heat mode selection process
51
Heating
30
Heating control 50
Hot gas bypass
75
HVAC modes
33
Independent outputs
30
Indoor air quality control
67

Indoor air quality options
29
Internal wiring
7
Local display tables
140-147
Lubrication
130
Main burners
139
Major system components
101-127
Mode trip helper
91
Modes
32
Multi-stage constant volume units with
mechanical thermostat
28
Multi-stage constant volume units
with space sensor
28
Power thilure
132
Pressurization mode
66
Programming operating schedules
29
Refrigerant charge
132
Remote control switch input
74
Remote switch
31
Replacement parts
139
Restart procedure
77
Run status menu
90
Safety considerations
2
Scrolling marquee
4, 122
Sensor trim configuration
73
Service
128-139
Service access
126'
Service analysis
77
Service test
29, 30
Service test mode logic
29
Single circuit stoppage
77
Smoke control modes
66
Smoke purge mode
66
Software version numbers
display table
91
Space temperature ofi_et
75
Staged gas heating control
54-56
Start up
7-27
Static pressure control
57
Static pressure reset
58,59
SumZ cooling algorithm
46
Supply air reset
31
Supply tan status monitoring logic
60
System modes
33
System Piloff M interface
5
Temperature compensated start
71
71
Temperature compensated start logic
Thermistor troubleshooting
77
Thermostat
31
132
Thermostatic expansion valve (TXV)
Third party control
31,32
Time clock configuration
75-77
Transducer troubleshooting
76'
Troubleshooting
77-101
Two-stage constant volume units
with mechanical thermostat
27
Two-stage constant volume units
with space sensor
27
Unit Cont]guration
submenu
35
Unit preparation
7
Unit setup
7
Unit staging tables
43-45
Unit start-up checklist
CZ-6
62
Unoccupied economizer tree cooling
Variable air volume units using return
air sensor or space temperature
sensor
28
VFD control
31
VFD information
161-169

71

171

Copyright 2008 Carrier Corporation
Manufacturer reserves the right to discontinue,
Catalog No. 04-53480050-01

or change at any time, specifications or designs without notice and without incurring obligations.
Printed in U.S.A.
Form 48/50A-7T
Pg 172
5-08
Replaces: 48/50A-6T

CONTROLS

SET POINT AND CONFIGURATION

MODEL NUMBER:

Software

SERIAL NUMBER:

MBB

CESR131343--

DATE:

RCB

CESR131249--

TECHNICIAN:

ECB

CESR131249--

NAVI

CESR131227--

SCB

CESR131226--

CEM

CESR131174--

MARQ

CESR131171--

ITEM

LOG

Version

EXPANSION

RANGE

DEFAULT

ENTRY

UNIT

UNIT CONFIGURATION

-_C.TYP

Machine Control Type

1 - 6 (multi-text strings)

-_CV.FN

Fan Mode (O=Auto, l=Cont)

0 - 1 (multi-text strings)

1

-_RM.CF
-_CEM

Remote Switch Config
CEM Module Installed

0 -3 (multi-text strings)
Yes/No

0
No

-_TCS.C

Temp.Cmp.Strt.Cool

Factr

0 - 60 min

0

-_TCS.H
-_SFS.S

Temp.Cmp.Strt.Heat
Factr
Fan Fail Shuts Down Unit

0 - 60 min
Yes/No

0
No

-_SFS.M

Fan Stat Monitoring

0 - 2 (multi-text strings)

-_VAV.S

VAV Unocc.Fan Retry Time

0 - 720 min

50

-_SlZE
-_DP.XR

Unit Size (20-60)
Disch.Press. Transducers

20 - 60
Yes/No

20
No

-_SP.XR

Suct. Pres. Trans. Type

0 -1 (multi-text strings)

-_RFG.T

Refrig: 0=R22 1=R410A

0 -1 (multi-text strings)

1

-_CND.T

Cnd HX Typ:O=RTPF I=MCHX

0 -1 (multi-text strings)

0

-_MAT.S
-_MAT.R

MAT Calc Config
Reset MAT Table Entries?

0 - 2 (multi-text strings)
Yes/No

1
No

-_MAT.D

MAT Outside Air Default

0-100%

20

-_ALTI

Altitude ........ in feet:

0 - 60000

-_DLAY
-_STAT

Startup Delay Time
TSTAT_Both Heat and Cool

0 - 900 sec
Yes/No

-_AUX.R
-_SENS

Auxiliary Relay Config
INPUT SENSOR CONFIG

0 -3

-_SENS-_SPT.S

Space Temp Sensor

Enable/Disable

Disable

-_SENS-_SP.O.S

Space Temp Offset Sensor

Enable/Disable

Disable

-_SENS-_SP.O.R
-_SENS-_RRH.S

Space Temp Offset Range
Return Air RH Sensor

1 - 10
Enable/Disable

5
Disable

Enable/Disable

Disable

Type

-_SENS-_FLT.S

Filter Stat.Sw.Enabled

COOL

COOLING CONFIGURATION

?

-_Z.GN

Capacity Threshold Adjst

-10 - 10

-_MC.LO

Compressor

-20 - 55 dF

Lockout Temp

4

0

0

0
0
No
0

1
40

-_C.FOD

Fan-Off Delay, Mech Cool

0 - 600 sec

60

-_MLV
-_M.M.

Min. Load Valve? (HGBP)
Motor Master Control

Yes/No
Yes/No

No
No

-_HPSP

Head Pressure Setpoint

80 - 150 d F

-_A I.EN

Enable Compressor

A1

Enable/Disable

Enable

-_A2.EN

Enable Compressor

A2

Enable/Disable

Enable

-_BI.EN

Enable Compressor

B1

Enable/Disable

Enable

-_B2.EN
-_CS.A I

Enable Compressor B2
CSB A1 Feedback Alarm

Enable/Disable
Enable/Disable

Enable
Enable

-_CS.A2

CSB A2 Feedback Alarm

Enable/Disable

Enable

-_CS.BI

CSB B1 Feedback Alarm

Enable/Disable

Enable

-_CS.B2
-_REV.R

CSB B2 Feedback Alarm
Rev Rotation Verified ?

Enable/Disable
Yes/No

Enable
No

-_H.SST
EDT.R

Hi SST Alert DelayTime
EVARDISCHRGE TEMP RESET

5 - 30 min

-_RS.CF
-_RTIO

EDT Reset Configuration
Reset Ratio

0 - 3 (multi-text strings)
0 - 10

-_LIMT

Reset Limit

0 - 20 ^F

-_RES.S

EDT 4-20 ma Reset Input

Enable/Disable

113

10
0
2
10
Disable

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480050-01
Printed in U.S.A.
Form 48/50A-7T
Pg CL-1
5-08
Replaces: 48/50A-6T

ITEM

EXPANSION

RANGE

DEFAULT

ENTRY

HEAT

HEATING CONFIGURATION

-_HT.CF
-_HT.SP

Heating Control Type
Heating Supply Air Setpt

0 -4
80 - 120 dF

0
85

-,OC.EN
-_LAT.M

Occupied Heating Enabled
MBB Sensor Heat Relocate

Yes/No
Yes/No

No
No

-,G.FOD

Fan-Off Delay, Gas Heat

45-600

45

-_E.FOD
-_SG.CF

Fan-Off Delay, Elec Heat
STAGED GAS CONFIGS

10-600

30

-_SG.CF-,HT.ST

Staged Gas Heat Type

0 -4

-_SG.CF-,CAP.M
-_SG.CF-,M.R.DB

Max Cap Change per Cycle
S,Gas DB min,dF/PID Rate

5 - 45
0 -5

-_SG.CF-,S.G.DB

St,Gas Temp, Dead Band

0 - 5 ^F

-_SG.CF-,RISE

Heat Rise dF/sec Clamp

0,05 - 0,2

-_SG.CF-,LAT.L
-_SG.CF-,LIM.M

LAT Limit Config
Limit Switch Monitoring?

0 - 20 ^F
Yes/No

Limit Switch High Temp

110 - 180 dF

170

Limit Switch Low Temp

1O0 - 170 dF

160

-_SG.CF-,HT.P
-_SG.CF-,HT.D

Heat Control Prop, Gain
Heat Control Derv, Gain

0 - 1,5
0 - 1,5

-_SG.CF-,HT.TM
SP

Heat PID Rate Config
SUPPLY STATIC PRESS,CFG,

60 - 300 sec

-_SP.CF
-_SP.FN

Static Pressure Config
Static Pres,Fan Control?

0 - 1 (multi-text strings)
Yes

-_SP.S

Static Pressure Sensor

Enable/Disable

-_SP.LO

Static Press, Low Range

-10 - 0

-_SP.HI
-_SP.SP

Static Press, High Range
Static Pressure Setpoint

0 - 10
0 - 5 "H20

-_SP.MN

VFD Minimum Speed

0 - 100 %

20

-_SP.MX

VFD Maximum Speed

0 - 100 %

100

-_SP.FS

VFD Fire Speed Override

0 - 100 %

100

-_SP.RS

Stat, Pres, Reset Config

0 - 4 (multi-text strings)

-_SP.RT

SP Reset Ratio ("/dF)

0 - 2,00 in, wg/dF

-_SP.LM
-_SP.EC
-_S.PID

SP Reset Limit in iwc (")
SP Reset Econo, Position
STAT.PR ESS,PID CONFIGS

0 - 2,00 in, wg
0 - 100 %

-_S.PID-,SP.TM

Stat,Pres,PID

1 - 200 sec

-_S.PID-,SP.P

Static Press, Prop, Gain

0 - 100

-_S.PID-,SP.I
-_S.PID-,SP.D

Static Pressure Intg, Gain
Static Pressure Derv, Gain

0 - 50
0 - 50

2
0

-_S.PID-,SP.SG
ECON

Static Press,System Gain
ECONOMIZER CONFIGURATION

0 - 50

1

-_EC.EN

Economizer

Installed?

Yes/No

-_EC.MN

Economizer

Min,Position

0 - 100 %

5

-_EC.MX

Economizer

Max,Position

0 - 100 %

98

-_E.TRM

Economzr Trim For SumZ ?

Yes/No

-_E.SEL

Econ ChangeOver

0 - 3 (multi-text strings)

-,OA.E.C

OA Enthalpy ChgOvr Selct

1 - 5 (multi-text strings)

-,OA.EN

Outdr, Enth Compare Value

18 - 28

24

-,OAT.L

High OAT Lockout Temp

-40 - 120 dF

60

-,O.DEW
-,ORH.S

OA Dewpoint Temp Limit
Outside Air RH Sensor

50 - 62 dF
Enable/Disable

-_E.TYP

Economizer

1-3 (multi-text strings)

1

-_EC.SW
-_E.CFG

Economizer Switch Config
ECON,OPERATION
CONFIGS

0 - 2 (multi-text strings)

0

-_E.CFG-,E.P.GN

Economizer

Prop,Gain

0,7 - 3,0

-_E.CFG-,E.RNG

Economizer

Range Adjust

0,5 - 5,0 ^F

2,5

-_E.CFG-,E.SPD
-_E.CFG-,E.DBD
-,UEFC

Economizer Speed Adjust
Economizer Deadband
UNOCC,ECON,FREE
COOLING

0,1 - 10,0
0,1 - 2,0 ^F

0,75
0,5

-,UEFC-,FC.CF
-,UEFC-,FC.TM

Unoc Econ Free Cool Cfg
Unoc Econ Free Cool Time

0-2 (multi-text strings)
0 - 720 min

-,UEFC-,FC.L.O

Un,Ec,Free Cool OAT Lock

40 - 70 dF

-_SG.CF-,SW.H.T
-_SG. CF-,SW.L.

T

0
45
0,5
2
0,06
10
No

1
1
90

IJJ
Z

-7
C3
IJJ

Run Rate

No
Yes
Disable
0
5
1,5

I-I--

©

C3
(.5
Z

o,
<
I-0

0
0,2
0,75
5
2
20
IJJ
Z
-7

C3
IJJ

i--

Select

Control Type

CL-2

Yes

Yes
1
4

55
Disable

1

0
120
50

6
C3
(.5
Z

o,
<
I--

ITEM

EXPANSION

RANGE

DEFAULT

ENTRY

BP

BUILDING PRESS. CONFIG

-_BP.CF
-_BP.RT

Building Press. Config
Bldg.Pres.PID Run Rate

0-2
5-120

-_BP.P

Bldg. Press, Prop, Gain

0-5

-_BP.I

Bldg.Press.lnteg.Gain

0-2

0.5

-_BP.D

Bldg.Press.Deriv.Gain

0-5

0.3

-_BP.SO

BP Setpoint Offset

0.0 - 0.5

-_BP.MN

BP VFD Minimum Speed
BP VFD Maximum Speed

0-1 O0
0-1 O0

lO
1oo

VFD/Act. Fire Speed/Pos.
Power Exhaust Motors

0-1 O0

1oo

-_BP.MT
-_BP.S

Building Pressure Sensor

-_BP.R

Bldg Press (+/-) Range

-_BP.SP

Building Pressure Setp.
Power Exhaust On Setp.1

-_BP.MX
-_BP.FS

-_BP.P1
-_BP.P2
-_B.CFG
-_B. CFG -_BP. SL
-_B. CFG-_BP. TM
-_B. CFG-_BP.ZG

o
lO
0.5

1-2
Enable/Dsable
0 - 1.00
-0.25 -_ 0.25 "H20

o.o5

1
Dsable
0.25

0 - 100%

0.05
35

Power Exhaust On Setp.2
BP ALGORITHM CONFIGS

0 - 100%

75

Modulating PE AIg. Slct.
BP PID Evaluation Time

1-3
0 - 10 min
0.1 - 10.0
0 - 1.000

1
0.05

0 - 1.000

0.04

1
1

-_B. CFG-_BP.LP

BP Threshold Adjustment
High BP Level
Low BP Level

D.LVT

COOL/HEAT SETPT. OFFSETS

-_L.H.ON

Dmd Level

-1 - 2 AF

1.5

-_H.H.ON

Dmd Level(+) Hi Heat On

0.5 - 20.0 AF

0.5

-_L.H.OF

Dmd Level(-) Lo Heat Off
Dmd Level
Lo Cool On

0.5 - 2 AF

-_L.C.ON

--1 - 2 AF

1
1.5

-_H.C.ON

Dmd Level(+) Hi Cool On

0.5 - 20.0 AF

0.5

-_L.C.OF

0.5 - 2 AF

-_C. T.LV

Dmd Level(-) Lo Cool Off
Cool Trend Demand Level

-_H. T.LV

Heat Trend Demand Level

0.1 - 5AF

0.1

-_C. T.TM

Cool Trend Time

30 - 600 sec

12O

30 - 600 sec

12O

0 - 3 (multi-text strings)
0 - 100%

1oo

-_B. CFG -_BP. HP

Lo Heat On

-_H. T.TM

Heat Trend Time

DMD.L
-_DM.L.S

DEMAND LIMIT CONFIG.
Demand Limit Select

-_D.L.20

Demand Limit at 20 ma

-_SH. NM
-_SH.DL

Loadshed Group Number
Loadshed Demand Delta

-_SH. TM
-_D.L.Sl
-_D.L.S2

0.1 - 5AF

0 - 99

1
0.1

o
o

Maximum Loadshed Time

0 -60%
0 - 120 min

6o

Demand Limit Sw.1 Setpt.

0 - 100%

8o

0 - 100%

5o

IAQ
-_DCVC

Demand Limit Sw.2 Setpt.
INDOOR AIR QUALITY CFG.
DCV ECONOMIZER SETPOINTS

-_DCV C-_EC.MN

Economizer

0 - 100%

5

-_DC V C-4A Q.M

IAQ Demand Vent Min.Pos.

0 - 100%

o

-_AQ.CF

AIR QUALITY CONFIGS

Min.Position

o

-_A Q.CF-4Q.A.

C

IAQ Analog Sensor Config

0 - 4 (multi-text strings)

o

-_A Q.CF-4Q.A.

F

IAQ 4-20 ma Fan Config

0 - 2 (multi-text strings)

o

IAQ Discrete Input Config

0 - 2 (multi-text strings)

o

-_AQ.CF-4Q.LF

IAQ Disc.In. Fan Config

0 - 2 (multi-text strings)

o

-_AQ.CF-_OQ.A.C

0 - 2 (multi-text strings)

o

-_AQ.SP

OAQ 4-20ma Sensor Config
AIR QUALITY SETPOINTS

-_AQ.SP-4Q.O.P

IAQ Econ Override Pos.

0-100

-_AQ.SP-_DAQ.L

Dill.Air Quality LoLimit

0-1000

1oo

-_AQ.SP-_DAQ.H

Dill.Air Quality HiLimit

100-2000

7oo

-_AQ.SP-_D.F.OF

DAQ PPM Fan Off Setpoint

0-2000

2oo

-_AQ.SP-_D.F.ON

DAQ PPM Fan On Setpoint

0-2000

4oo

-_AQ.SP-4AQ.R

-5-5

-_AQ.SP-_OAQ.L

DiE AQ Responsiveness
OAQ Lockout Value

0-2000

0

-_AQ.SP-_OAQ.U

User Determined

0-5000

4oo

-_AQ.S.R

AIR QUALITY SENSOR RANGE

-_AQ.CF-4Q.L

C

OAQ

CL-3

%

1oo

0

ITEM
-*AQ.S.R-*IQ.R.L

EXPANSION
IAQ Low Reference

RANGE

DEFAULT

ENTRY

-,AQ.S.R-,IQ.R.H
-eAQ.S.R-eOQ.R.L
-,AQ.S.R-,OQ.R.H
-,IAQ.P

IAQ High Reference
OAQ Low Reference
OAQ High Reference
IAQ PRE-OCCUPIED

-,IAQ.P-,IQ.PG
-,IAQ.P-,IQ.P.T

IAQ Purge
IAQ Purge Duration

Yes/No
5-60 min

No
15

-,IAQ.P-,IQ.P.L
-,IAQ.P-,IQ.P.H
-,IAQ.P-,IQ.L.O
DEHU

IAQ Purge LoTemp Min Pos
IAQ Purge HiTemp Min Pos
IAQ Purge OAT Lockout
DEHUMIDIFICATION
CONFIG.

0-100 %
0-100 %
35-70 dF

10
35
50

-_D.SEL
-_D.SEN
-_D.EC.D

Dehumidification Config
Dehumidification Sensor
Econ disable in DH mode?

0-2(multi-text
1-2(multi-text
Yes/No

strings)
strings)

0
1
Yes

-_D. VCF
-_D. VRA

Vent Reheat Setpt Select
Vent Reheat RAT offset

0-1 (multi-text strings)
0-8 AF

0
0

-_D. VHT
-_D.C.SP
-_D.RH.S
CCN
-,CCNA
-,CCNB

Vent Reheat Setpoint
Dehumidify Cool Setpoint
Dehumidify RH Setpoint
CCN CONFIGURATION
CCN Address
CCN Bus Number

55-95 dF
40-55 dF
10-90 %
1 - 239
0 - 239

1
0

LU
Z

-_BAUD
-_BROD
-_BROD-,TM.DT
-_BROD-,OAT.B
-_BROD-,ORH.B
-_BROD-,OAQ.B
-_BROD-,G.S.B
-_BROD-,B.ACK
-_SC.OV
-_SC.OV-eSCH.N

CCN Baud Rate
CCN BROADCST DEFINITIONS
CCN Time/Date Broadcast
CCN OAT Broadcast
CCN OARH Broadcast
CCN OAQ Broadcast
Global Schedule Broadcst
CCN Broadcast Ack'er
CCN SCHEDULES-OVERRIDES
Schedule Number

1 - 5 (multi-text strings)

3

LU

-_SC.OV-eHOL.T
-_SC.OV-eO.T.L.
-_SC.OV-,OVEX
-_SC.OV-eSPT.O
-_SC.OV-eT58.0
-_SC.OV-eGL.OV
ALLM
-_SP.L.O
-_SP.H.O
-_SP.L.U
-_SP.H.U
-_SA.L.O
-_SA.H.O
-_SA.L.U
-_SA.H.U
-_RA.L.O
-_RA.H.O
-_RA.L.U
-_RA.H.U
-_R.RH.L

Accept Global Holidays?
Override Time Limit
Timed Override Hours
SPT Override Enabled ?
T58 Override Enabled ?
Global Sched. Override ?
ALERT LIMIT CONFIG.
SPT Io alert limit/occ
SPT hi alert limit/occ
SPT Io alert limit/unocc
SPT hi alert limit/unocc
EDT Io alert limit/occ
EDT hi alert limit/occ
EDT Io alert limit/unocc
EDT hi alert limit/unocc
RAT Io alert limit/occ
RAT hi alert limit/occ
RAT Io alert limit/unocc
RAT hi alert limit/unocc
RARH low alert limit

YES/NO
0 - 4 HRS
0 - 4 HRS
YES/NO
YES/NO
YES/NO

No
1
0
Yes
Yes
No

-10-245
-10-245
-10-245
-10-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
-40-245
0-100 %

60
85
45
100
40
100
40
100
60
90
40
100
0

-_R.RH.H
-_SP.L

RARH high alert limit
SP low alert limit

0-100 %
0-5 "H20

-_SP.H
-_BP.L

SP high alert limit
BP Io alert limit

0-5 "H20
-0.25-0.25

-_BP.H
-,IAQ.H
TRIM

BP high alert limit
IAQ high alert limit
SENSOR TRIM CONFIG.

-0.25-0.25
0-5000

-_SAT.T
-_RAT.T
-*OAT.T
-_SPT.T

Air Temp Lvg SF Trim
RAT Trim
OAT Trim
SPT Trim

-10
-10
-10
-10

-

10
10
10
10

AF
AF
AF
AF

0
0
0
0

-*CTA.T
-*CTB.T
-_SP.A.T
-_SP.B.T
-_DP.A.T
-_DP.B.T

Cir A Sat.Cond.Temp Trim
Cir B Sat.Cond.Temp Trim
Suct.Press.Circ.A Trim
Suct.Press.Circ.B Trim
Dis.Press.Circ.A Trim
Dis.Press.Circ.B Trim

-30
-30
-50
-50
-50
-50

-

30
30
50
50
50
50

AF
AF
PSIG
PSIG
PSIG
PSIG

0
0
0
0
0
0

0 - 5000

0

0 - 5000
0 - 5000
0 - 5000

2000
0
2000

PURGE

70
45
55

-7
C3
II-

©
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF

On
Off
Off
Off
Off
Off

0 - 99

CL-4

C3
(.5
Z

o
<(
IO

1

dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF
dF

100
0
"H20
"H20

2
-0.25
0.25
1200

LU
Z
--7

C3
LU

i-

6
C3
(.5
Z

o
<(
I-

SW.LG

ITEM

EXPANSION
SWITCH LOGIC: NO / NC

RANGE

-_FTS.L
-_IGC.L

Filter Status Inpt-Clean
IGC Feedback - Off

Open/Close
Open/Close

Open
Open

-_RMI.L
-_ECS.L
-_SFS.L

RemSw Off-Unoc-Strt-NoOv
Economizer Switch - No
Fan Status Sw, - Off

Open/Close
Open/Close
Open/Close

Open
Open
Open

-_DL I.L
-_DL2.L
-_IAQ.L

Dmd,Lmt,Sw, 1 - Off
Dmd,Lmt,-Dehumid
- Off
IAQ Disc,Input - Low

Open/Close
Open/Close
Open/Close

Open
Open
Open

-_FSD.L
-_PRS.L
-_EVC.L

Fire Shutdown - Off
Pressurization Sw, - Off
Evacuation Sw, - Off

Open/Close
Open/Close
Open/Close

Open
Open
Open

-_PRG.L
DISP

Smoke Purge Sw, - Off
DISPLAY CONFIGURATION

Open/Close

Open

-+TEST

Test Display LEDs

ON/OFF

-_METR
-_LANG
-_PAS.E
-+PASS

Metric Display
Language Selection
Password Enable
Service Password

ON/OFF
0-1 (multi-text strings)
ENABLE/DISABLE
0000-9999

CL-5

DEFAULT

Off
Off
0
Enable
1111

ENTRY

UNIT START-UP

MODEL
NO.:
SOFTWARE

CHECKLIST

SERIAL NO.:
TECHNICIAN:

VERSION

DATE:

PRE-START-UP:
[] VERIFY THAT DIP SWITCH SETTINGS ARE CORRECT
[] VERIFY

THAT ALL PACK1NG

[] REMOVE

ALL COMPRESSOR

MATERIALS
SHIPPING

HAVE BEEN REMOVED
HOLDDOWN

[] VERIFY

INSTALLATION

OF ECONOMIZER

HOOD

[] VERIFY

INSTALLATION

OF ALL OPTIONS

AND ACCESSORIES

[] VERIFY

THAT ALL ELECTRICAL

[] CHECK GAS PIPING FOR LEAKS
[] CHECK THAT RETURN-MR
[] VERIFY

CONNECTIONS

FROM UNIT

BOLTS AND BRACKETS

AND TERMINALS

PER INSTRUCTIONS

ARE TIGHT

(48A ONLY)

UA
Z

FILTER AND OUTDOOR-MR

THAT UNIT IS LEVEL WITHIN

TOLERANCES

FILTERS ARE CLEAN AND IN PLACE
FOR PROPER

CONDENSATE

-q
c3
UA

DRAINAGE

bb-

o

[] CHECK FAN WHEELS

AND PROPELLERS

FOR LOCATION

IN HOUSING/ORIFICE,

AND SETSCREW

IS TIGHT

C3
Z

[] VERIFY

THAT FAN SHEAVES ARE ALIGNED

[] VERIFY

THAT SUCTION,

[] VERIFY

THAT CRANKCASE

DISCHARGE,

AND BELTS ARE PROPERLY

AND LIQUID

q

TENSIONED

SERVICE VALVES ON EACH CIRCUIT

ARE OPEN

<
ti
D

©

HEATERS

HAVE BEEN ON 24 HOURS BEFORE

START-UP

START-UP:
ELECTRICAL
SUPPLY VOLTAGE

L l-L2

L2-L3

L3-L1

COMPRESSOR

AMPS -- COMPRESSOR

NO. 1

L1

L2

L3

COMPRESSOR

AMPS -- COMPRESSOR

NO. 2

L1

L2

L3

SUPPLY FANS AMPS

EXHAUST

(CV)
(VAV)

FAN AMPS

*
iii
Z

*VAV fan supply amps reading must be taken with a true RIMS meter for accurate readings.
C3
iii

TEMPERATURES
OUTDOOR-MR
RETURN-MR
COOLING

ti

6

TEMPERATURE

F DB (Dry Bulb)

TEMPERATURE

F DB

SUPPLY MR

C3
Z

F Vv_B(Wet Bulb)

q
<
ti

F

GAS HEAT SUPPLY MR

F (481 ONLY)

ELECTRIC

F (501 ONLY, IF EQUIPPED)

HEAT SUPPLY MR

PRESSURES
GAS INLET PRESSURE
GAS MANIFOLD

PRESSURE

IN. WG (48A ONLY)
STAGE NO. 1

IN. WG

STAGE NO. 2

IN. WG (48A ONLY)

REFRIGERANT

SUCTION

CIRCUIT NO. 1

PSIG

CIRCUIT

NO. 2

PSIG

REFRIGERANT

DISCHARGE

CIRCUIT NO. 2

PSIG

CIRCUIT

NO. 2

PSIG

[] VERIFY REFRIGERANT CHARGE.

Copyright 2008 Carrier Corporation
Manufacturer reserves the right to discontinue,
Catalog No. 04-53480050-01

or change at any time, specifications or designs without notice and without incurring obligations.
Printed in U.S.A.
Form 48/50A-7T
Pg CL-6
5-08
Replaces: 48/50A-6T



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File Type Extension             : pdf
MIME Type                       : application/pdf
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Page Count                      : 178
Page Layout                     : SinglePage
Page Mode                       : UseNone
Producer                        : Goby Monitor Application version 4, 0, 0, 13
Create Date                     : Wed Feb 11 04:53:12 2009
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