Carrier Aquasnap Mpw015 045 Users Manual 30mp 1t

MPW015-045 to the manual e4caf960-1c0b-41e1-ab66-8d37e842de62

2015-01-24

: Carrier Carrier-Aquasnap-Mpw015-045-Users-Manual-311029 carrier-aquasnap-mpw015-045-users-manual-311029 carrier pdf

Open the PDF directly: View PDF .
Page Count: 80

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300053-01 Printed in U.S.A. Form 30MP-1T Pg 1 1-10 Replaces: New

Controls, Start-Up, Operation,

Service, and Troubleshooting

SAFETY CONSIDERATIONS

Installing, starting up, and servicing this equipment can be

hazardous due to system pressures, electrical components, and

equipment location (elevated structures, mechanical rooms,

etc.). Only trained, qualified installers and service mechanics

should install, start up, and service this equipment.

When working on this equipment, observe precautions in

the literature, and on tags, stickers, and labels attached to the

equipment, and any other safety precautions that apply. Follow

all safety codes. Wear safety glasses and work gloves. Use

care in handling, rigging, and setting this equipment, and in

handling all electrical components.

WARNING

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during installation. There

may be more than one disconnect switch. Tag all discon-

nect locations to alert others not to restore power until work

is completed.

WARNING

DO NOT VENT refrigerant relief valves within a building.

Outlet from relief valves must be vented outdoors in

accordance with the latest edition of ANSI/ASHRAE

(American National Standards Institute/American Society

of Heating, Refrigerating and Air Conditioning Engineers)

15 (Safety Code for Mechanical Refrigeration). The

accumulation of refrigerant in an enclosed space can

displace oxygen and cause asphyxiation. Provide adequate

ventilation in enclosed or low overhead areas. Inhalation of

high concentrations of vapor is harmful and may cause

heart irregularities, unconsciousness or death. Misuse can

be fatal. Vapor is heavier than air and reduces the amount

of oxygen available for breathing. Product causes eye and

skin irritation. Decomposition products are hazardous.

WARNING

DO NOT attempt to unbraze factory joints when servicing

this equipment. Compressor oil is flammable and there is

no way to detect how much oil may be in any of the

refrigerant lines. Cut lines with a tubing cutter as required

when performing service. Use a pan to catch any oil that

may come out of the lines and as a gage for how much oil

to add to system. DO NOT re-use compressor oil. Damage

to equipment or personal injury may result.

CAUTION

This unit uses a microprocessor-based electronic control

system. Do not use jumpers or other tools to short out

components, or to bypass or otherwise depart from recom-

mended procedures. Any short-to-ground of the control

board or accompanying wiring may destroy the electronic

modules or electrical components.

CAUTION

To prevent potential damage to heat exchanger, always run

fluid through heat exchanger when adding or removing

refrigerant charge. Use appropriate brine solutions in cooler

fluid loop to prevent the freezing of brazed plate heat

exchanger when the equipment is exposed to temperatures

below 32 F (0° C). Proof of flow switch is factory installed

on all models. Do NOT remove power from this chiller dur-

ing winter shutdown periods without taking precaution to

remove all water from heat exchanger and optional

hydronic system. Failure to properly protect the system

from freezing may constitute abuse and may void warranty.

CAUTION

Compressors require specific rotation. Monitor control

alarms during first compressor start up for reverse rotation

protection. Damage to unit may result.

CAUTION

Refrigerant charge must be removed slowly to prevent loss

of compressor oil that could result in compressor failure.

CAUTION

Puron® refrigerant (R-410A) systems operate at higher

pressures than standard R-22 systems. Do not use R-22 ser-

vice equipment or components on Puron refrigerant equip-

ment. If service equipment is not rated for Puron

refrigerant, equipment damage or personal injury may

result.

AQUASNAP®

30MPA,MPW015-045

Liquid Chillers with Scroll Compressors

and ComfortLink™ Controls

CONTENTS

Page

SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . 1

GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Conventions Used in this Manual . . . . . . . . . . . . . . . . . . . 2

Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-33

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Main Base Board (MBB). . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Energy Management Module (EMM). . . . . . . . . . . . . . . . 14

Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . . . . . . 14

Enable/Off/Remote Contact Switch. . . . . . . . . . . . . . . . . 14

Emergency On/Off Switch. . . . . . . . . . . . . . . . . . . . . . . . . . 14

Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Control Module Communication . . . . . . . . . . . . . . . . . . . 14

Carrier Comfort Network® Interface . . . . . . . . . . . . . . . . 14

Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

• COOLER LEAVING FLUID SENSOR

• COOLER ENTERING FLUID SENSOR

• CONDENSER LEAVING FLUID SENSOR

• CONDENSER ENTERING FLUID SENSOR

• COMPRESSOR RETURN GAS

TEMPERATURE SENSOR

• OUTDOOR-AIR TEMPERATURE SENSOR

• DUAL LEAVING WATER TEMPERATURE SENSOR

• REMOTE SPACE TEMPERATURE SENSOR

Energy Management Module . . . . . . . . . . . . . . . . . . . . . . . 21

Loss-of-Cooler Flow Protection . . . . . . . . . . . . . . . . . . . . 21

Condenser Flow Protection . . . . . . . . . . . . . . . . . . . . . . . . 21

Thermostatic Expansion Valves (TXV) . . . . . . . . . . . . . 21

Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

• MINUTES LEFT FOR START

• MINUTES OFF TIME

• LEAD/LAG DETERMINATION

• CAPACITY CONTROL OVERRIDES

Operation of Machine Based on Control Method

and Cooling Set Point Selection Settings . . . . . . . . 24

Cooling Set Point Select . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Service Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Cooler Pump Sequence of Operation . . . . . . . . . . . . . . 25

Condenser Pump/Condenser Fan Output

Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Configuring and Operating Dual Chiller Control. . . . 25

Temperature Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

• DEMAND LIMIT (2-Stage Switch Controlled)

• EXTERNALLY POWERED DEMAND LIMIT

(4 to 20 mA Controlled)

• DEMAND LIMIT (CCN Loadshed Controlled)

Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . . . . . . 32

PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34

System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

START-UP AND OPERATION . . . . . . . . . . . . . . . . . . . . 34-36

Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Check Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . 34

Operating Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

• TEMPERATURES

• VOLTAGE — ALL UNITS

OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . 36

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-44

Electronic Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

• CONTROL COMPONENTS

Compressor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 36

30MPW Condenser and 30MP Cooler . . . . . . . . . . . . . . 36

• BRAZED-PLATE COOLER AND CONDENSER

HEAT EXCHANGER REPLACEMENT

• BRAZED-PLATE COOLER AND CONDENSER

HEAT EXCHANGER CLEANING

Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Check Refrigerant Feed Components . . . . . . . . . . . . . . 37

• FILTER DRIER

• MOISTURE-LIQUID INDICATOR

• THERMOSTATIC EXPANSION VALVE (TXV)

• MINIMUM LOAD VALVE

• PRESSURE RELIEF DEVICES

Check Unit Safeties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Thermistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chilled Water Flow Switch . . . . . . . . . . . . . . . . . . . . . . . . . 39

Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Replacing Defective Modules. . . . . . . . . . . . . . . . . . . . 43

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44,45

Recommended Maintenance Schedule . . . . . . . . . . . . 44

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .44-52

Complete Unit Stoppage and Restart . . . . . . . . . . . . . . 44

• GENERAL POWER FAILURE

• UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS

OFF

• CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN

• OPEN 24-V CONTROL CIRCUIT BREAKERS

• COOLING LOAD SATISFIED

• THERMISTOR FAILURE

• LOW SATURATED SUCTION

• COMPRESSOR SAFETIES

Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

APPENDIX A — LOCAL DISPLAY TABLES . . . . . . .53-64

APPENDIX B — CCN TABLES. . . . . . . . . . . . . . . . . . . .65-72

START-UP CHECKLIST FOR 30MP LIQUID

CHILLER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1 to CL-8

GENERAL

This publication contains Start-Up, Service, Controls, Oper-

ation, and Troubleshooting information for the 30MPW water-

cooled chillers and the 30MPA air-cooled chillers. See Table 1.

These liquid chillers are equipped with ComfortLink controls

and conventional thermostatic expansion valves (TXVs). The

30MPA units and the 30MPW units with optional medium

temperature brine are also equipped with liquid line solenoid

valves (LLSVs).

Table 1 — Unit Sizes

Conventions Used in This Manual — The follow-

ing 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 Minimum Load Valve Select

Point, which is located in the Configuration mode, Option 1

sub-mode, would be written as ConfigurationOPT1

MLV.S.

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 sub-modes using the

and keys. The arrow symbol in the path name

represents pressing to move into the next level of the

menu structure.

CAUTION

This unit uses a microprocessor-based electronic control

system. Do not use jumpers or other tools to short out or

bypass components or otherwise depart from recom-

mended procedures. Any short-to-ground of the control

board or accompanying wiring may destroy the board or

electrical component.

UNIT MODEL NOMINAL TONS

30MPA,MPW015 15

30MPA,MPW020 20

30MPA,MPW030 30

30MPA,MPW040 40

30MPA,MPW045 45

ENTER

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 parenthesis after the value. As an example,

ConfigurationOPT1MLV.S = 1 (Minimum Load Valve

Select).

Pressing the and keys simultaneously

will scroll an expanded text description of the point name or

value across the display. The expanded description is shown in

the local display tables but will not be shown with the path

names in text.

The CCN (Carrier Comfort Network®) 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 the manual.

Basic Control Usage

SCROLLING MARQUEE DISPLAY — The scrolling mar-

quee display is the standard interface display to the ComfortLink

Control System for 30MP units. The display has up and down

arrow keys, an key, and an key. These

keys are used to navigate through the different levels of the

display structure. Press the key until the highest

operating level is displayed to move through the top 11 mode

levels indicated by LEDs (light emitting diodes) on the left side

of the display. See Fig. 1 and Tables 2-14.

Once within a mode or sub-mode, pressing the

and keys simultaneously will put the scrolling

marquee display into expanded text mode where the full mean-

ing of all sub-modes, items and their values can be displayed

for the current selection. Press the and

keys to return the scrolling marquee display to its default menu

of rotating display items (those items in Run Status



VIEW).

In addition, the password will be disabled, requiring that it be

entered again before changes can be made to password protect-

ed items. Press the key to exit out of the expanded

text mode.

NOTE: When the Language Selection (Configuration



DISP



LANG), variable is changed, all appropriate display

expansions will immediately change to the new language. No

power-off or control reset is required when reconfiguring

languages.

When a specific item is located, the item name alternates

with the value. Press the key at a changeable item

and the value will be displayed. Press again and the

value will begin to flash indicating that the value can be

changed. Use the up and down arrow keys to change the value,

and confirm the value by pressing the key.

Changing item values or testing outputs is accomplished in

the same manner. Locate and display the desired item. Press

so that the item value flashes. Use the arrow keys to

change the value or state and press the key to accept

it. Press the key to return to the next higher level of

structure. Repeat the process as required for other items.

Items in the Configuration and Service Test modes are pass-

word protected. The words ‘PASS’ and ‘WORD’ will alternate

on the display when required. The default password is 0111.

Press and the 1111 password will be displayed. Press

again and the first digit will begin to flash. Use the

arrow keys to change the number and press to accept

the digit. Continue with the remaining digits of the password.

The password can only be changed through CCN operator in-

terface software such as ComfortWORKS®, ComfortVIEW™

and Service Tool.

See Tables 2-14 and Appendix A for further details.

ACCESSORY NAVIGATOR™ DISPLAY MODULE —

The Navigator module provides a mobile user interface to the

ComfortLink™ control system, which is only available as a

field-installed accessory. The display has up and down arrow

keys, an key, and an key. These keys are

used to navigate through the different levels of the display

structure. Press the key until ‘Select a Menu Item’

is displayed to move through the top 11 mode levels indicated

by LEDs on the left side of the display. See Fig. 2.

Once within a Mode or sub-mode, a “>” indicates the cur-

rently selected item on the display screen. Pressing the

and keys simultaneously will put the Nav-

igator module into expanded text mode where the full meaning

of all sub-modes, items and their values can be displayed. Press-

ing the and keys when the display says

‘Select Menu Item’ (Mode LED level) will return the Navigator

module to its default menu of rotating display items (those items

in Run Status



VIEW). In addition, the password will be dis-

abled, requiring that it be entered again before changes can be

made to password protected items. Press the key to

exit out of the expanded text mode.

NOTE: When the Language Selection (Configuration



DISP



LANG), variable is changed, all appropriate display

expansions will immediately change to the new language. No

power-off or control reset is required when reconfiguring

languages.

When a specific item is located, the item name appears on the

left of the display, the value will appear near the middle of the

display and the units (if any) will appear on the far right of the

display. Press the key at a changeable item and the val-

ue will begin to flash. Use the up and down arrow keys to change

the value, and confirm the value by pressing the key.

Changing item values or testing outputs is accomplished in

the same manner. Locate and display the desired item. Press

so that the item value flashes. Use the arrow keys to

change the value or state and press the key to accept

it. Press the key to return to the next higher level of

structure. Repeat the process as required for other items.

Items in the Configuration and Service Test modes are pass-

word protected. The words Enter Password will be displayed

when required, with 1111 also being displayed. The default

password is 1111. Use the arrow keys to change the number

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

Run Status

Service Test

Temperature

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

Alarm Status

ENTER

MODE

ESCAPE

Fig. 1 — Scrolling Marquee Display

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

and press to enter the digit. Continue with the re-

maining digits of the password. The password can only be

changed through CCN operator interface software such as

ComfortWORKS, ComfortVIEW and Service Tool.

Adjusting the Contrast — The contrast of the display can be

adjusted to suit ambient conditions. To adjust the contrast of

the Navigator module, press the key until the dis-

play reads, “Select a menu item.” Using the arrow keys move

to the Configuration mode. Press to obtain access to

this mode. The display will read:

> TEST OFF

METR OFF

LANG ENGLISH

Pressing will cause the “OFF” to flash. Use the up

or down arrow to change “OFF” to “ON”. Pressing

will illuminate all LEDs and display all pixels in the view

screen. Pressing and simultaneously

allows the user to adjust the display contrast. Use the up or

down arrows to adjust the contrast. The screen’s contrast will

change with the adjustment. Press to accept the

change. The Navigator module will keep this setting as long as

it is plugged in to the LEN bus.

Adjusting the Backlight Brightness — The backlight of the

display can be adjusted to suit ambient conditions. The factory

default is set to the highest level. To adjust the backlight of the

Navigator module, press the key until the display

reads, “Select a menu item.” Using the arrow keys move to the

Configuration mode. Press to obtain access to this

mode. The display will read:

> TEST OFF

METR OFF

LANG ENGLISH

Pressing will cause the “OFF” to flash. Use the up

or down arrow keys to change “OFF” to “ON”. Pressing

will illuminate all LEDs and display all pixels in the

view screen. Pressing the up and down arrow keys simultane-

ously allows the user to adjust the display brightness. Use the

up or down arrow keys to adjust screen brightness. Press

to accept the change. The Navigator module will

keep this setting as long as it is plugged in to the LEN bus.

Table 2 — Scrolling Marquee Display Menu Structure*

LEGEND

Ckt — Circuit

*Throughout this text, the location of items in the menu structure will be

described in the following format:

Item Expansion (Mode Name



Sub-mode Name



ITEM)

For example, using the language selection item:

Language Selection (Configuration



DISP



LANG)

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

Run Status

Service Tes t

Tem peratures

Pressures

Setpoints

Inputs

Outputs

Configuration

Time Clock

Operating Modes

Alarms

ENTER

ESC

MODE

Alarm Status

ComfortLink

Fig. 2 — Accessory Navigator™ Display Module

MODE RUN

STATUS

SERVICE

TEST TEMPERATURES PRESSURES SET

POINTS INPUTS OUTPUTS CONFIGURATION TIME

CLOCK

OPERATING

MODES ALARMS

SUB-MODE

Auto

View of

Run Status

(VIEW)

Service

Te s t M o d e

(TEST)

Unit Temperatures

(UNIT)

Pressures

Circuit A

(PRC.A)

Cooling

Setpoints

(COOL)

General

Inputs

(GEN.I)

General

Outputs

(GEN.O)

Display

Configuration

(DISP)

Time of

Day

(TIME)

Modes

(MODE)

Current

(CRNT)

Unit Run

Hour and

Start

(RUN)

Outputs

and Pumps

(OUTS)

Temperatures

Circuit A

(CIR.A)

Head

Pressure

Setpoint

(HEAD)

Circuit

Inputs

(CRCT)

Outputs

Circuit A

(CIR.A)

Unit

Configuration

(UNIT)

Month,

Date, Day,

and Year

(DATE)

Reset

Alarms

(RCRN)

Circuit and

Compressor

Run Hours

(HOUR)

Ciruit A Comp

Te s t

(CMPA)

Brine

Freeze

Setpoint

(FRZ)

4-20mA

Inputs

(4-20)

Unit Options 1

Hardware

(OPT1)

Daylight

Savings

Time

(DST)

Alarm

History

(HIST)

Local

Holiday

Schedules

(HOL.L)

Compressor

Starts

(STRT)

Unit Options 2

Controls

(OPT2)

Preventive

Maintenance

(PM)

CCN Network

Configuration

(CCN)

Schedule

Number

(SCH.N)

Software

Version

(VERS)

Reset Cool Temp

(RSET)

Local

Occu-

pancy

Schedule

(SCH.L)

Set Point and

Ramp Load

(SLCT)

Schedule

Override

(OVR)

Service

Configuration

(SERV)

Broadcast

Configuration

(BCST)

Table 3 — Run Status Mode and Sub-Mode Directory

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY SUB-ITEM DISPLAY SUB-ITEM DISPLAY ITEM

EXPANSION COMMENT

VIEW EWT XXX.X FENTERING FLUID TEMP

LWT XXX.X FLEAVING FLUID TEMP

SETP XXX.X FACTIVE SETPOINT

CTPT XXX.X FCONTROL POINT

LOD.F XXX LOAD/UNLOAD FACTOR

STAT X CONTROL MODE 0 = Service Test

1 = Off Local

2 = Off CCN

3 = Off Time

4 = Off Emrgcy

5 = On Local

6 = On CCN

7 = On Time

8 = Ht Enabled

9 = Pump Delay

OCC YES/NO OCCUPIED

MODE YES/NO OVERRIDE MODES IN EFFECT

CAP XXX % PERCENT TOTAL CAPACITY

STGE X REQUESTED STAGE

ALRM XXX CURRENT ALARMS & ALERTS

TIME XX.XX TIME OF DAY 00.00-23.59

MNTH XX MONTH OF YEAR 1 = January, 2 = February, etc.

DATE XX DAY OF MONTH 01-31

YEAR XX YEAR OF CENTURY

RUN HRS.U XXXX HRS MACHINE OPERATING HOURS

STR.U XXXX MACHINE STARTS

HR.P1 XXXX.X PUMP 1 RUN HOURS

HR.P2 XXXX.X PUMP 2 RUN HOURS

HOUR HR.A1 XXXX HRS COMPRESSOR A1 RUN HOURS

HR.A2 XXXX HRS COMPRESSOR A2 RUN HOURS

HR.A3 XXXX HRS COMPRESSOR A3 RUN HOURS

STRT ST.A1 XXXX COMPRESSOR A1 STARTS

ST.A2 XXXX COMPRESSOR A2 STARTS

ST.A3 XXXX COMPRESSOR A3 STARTS

PM STRN STRAINER MAINTENANCE

SI.ST XXXX HRS STRAINER SRVC INTERVAL

S.T.DN XXXX HRS STRAINER SRVC COUNTDOWN

S.T.MN YES/NO STRAINER MAINT. DONE User Entry

ST.DT STRAINER MAINT. DATES

S.T.M0 MM/DD/YY HH:MM

S.T.M1 MM/DD/YY HH:MM

S.T.M2 MM/DD/YY HH:MM

S.T.M3 MM/DD/YY HH:MM

S.T.M4 MM/DD/YY HH:MM

ENTER

Table 3 — Run Status Mode and Sub-Mode Directory (cont)

*Press and simultaneously to obtain version number.

Table 4 — Service Test Mode and Sub-Mode Directory

Table 5 — Temperature Mode and Sub-Mode Directory

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY SUB-ITEM DISPLAY SUB-ITEM DISPLAY ITEM

EXPANSION COMMENT

VERS AUX CESR131333-xx-xx xx-xx is Version number*

MBB CESR131279-xx-xx xx-xx is Version number*

EMM CESR131174-xx-xx xx-xx is Version number*

MARQ CESR131171-xx-xx xx-xx is Version number*

NAVI CESR130227-xx-xx xx-xx is Version number*

ENTER

ESCAPE

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

TEST ON/OFF SERVICE TEST MODE To Enable Service Test Mode,

move Enable/Off/Remote

Contact switch to OFF. Change

TEST to ON. Move switch to

ENABLE.

OUTS OUTPUTS AND PUMPS

CLR.P ON/OFF COOLER PUMP RELAY

CND.P ON/OFF CONDENSER PUMP

UL.TM 0 to 15 COMP A1 UNLOAD TIME

CC.H ON/OFF CRANKCASE HEATER

CW.VO ON/OFF CONDENSER VALVE OPEN

CW.VC ON/OFF CONDENSER VALVE CLOSE

LL.SV ON/OFF LIQUID LINE SOLENOID

RMT.A ON/OFF REMOTE ALARM RELAY

CMPA CIRCUIT A COMPRESSOR TEST

CC.A1 ON/OFF COMPRESSOR A1 RELAY

UL.TM 0 to 15 COMP A1 UNLOAD TIME

CC.A2 ON/OFF COMPRESSOR A2 RELAY

CC.A3 ON/OFF COMPRESSOR A3 RELAY

MLV ON/OFF MINIMUM LOAD VALVE RELAY

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

UNIT ENT AND LEAVE UNIT TEMPS

CEWT XXX.X FCOOLER ENTERING FLUID

CLWT XXX.X FCOOLER LEAVING FLUID

CDET XXX.X FCONDENSER ENTERING FLUID

CDLT XXX.X FCONDENSER LEAVING FLUID

OAT XXX.X FOUTSIDE AIR TEMPERATURE

SPT XXX.X FSPACE TEMPERATURE

DLWT XXX.X FLEAD/LAG LEAVING FLUID

ENTER

Table 5 — Temperature Mode and Sub-Mode Directory (cont)

Table 6 — Pressure Mode and Sub-Mode Directory

Table 7 — Set Points Mode and Sub-Mode Directory

Table 8 — Inputs Mode and Sub-Mode Directory

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

CIR.A TEMPERATURES CIRCUIT A

SCT.A XXX.X FSATURATED CONDENSING TMP

SST.A XXX.X FSATURATED SUCTION TEMP

RGT.A XXX.X FCOMPR RETURN GAS TEMP

D.GAS XXX.X FDISCHARGE GAS TEMP

SH.A XXX.X ^F SUCTION SUPERHEAT TEMP

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

PRC.A PRESSURES CIRCUIT A

DP.A XXX.X PSIG DISCHARGE PRESSURE

SP.A XXX.X PSIG SUCTION PRESSURE

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

COOL COOLING SETPOINTS

CSP.1 XXX.X FCOOLING SETPOINT 1 Default: 44 F

CSP.2 XXX.X FCOOLING SETPOINT 2 Default: 44 F

CSP.3 XXX.X FICE SETPOINT Default: 32 F

HEAD HEAD PRESSURE SETPOINTS

H.DP XXX.X FHEAD SETPOINT Default: 95 F

FRZ BRINE FREEZE SETPOINT

BR.FZ XXX.X FBRINE FREEZE POINT Default: 34 F

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

GEN.I GENERAL INPUTS

STST STRT/STOP START/STOP SWITCH

FLOW ON/OFF COOLER FLOW SWITCH

CD.FL OPEN/CLSE CONDENSER FLOW SWITCH

DLS1 ON/OFF DEMAND LIMIT SWITCH 1

DLS2 ON/OFF DEMAND LIMIT SWITCH 2

ICED ON/OFF ICE DONE

DUAL ON/OFF DUAL SETPOINT SWITCH

CRCT CIRCUITS INPUTS

FKA1 ON/OFF COMPRESSOR A1 FEEDBACK

FKA2 ON/OFF COMPRESSOR A2 FEEDBACK

FKA3 ON/OFF COMPRESSOR A3 FEEDBACK

4-20 4-20 MA INPUTS

DMND XX.X MA 4-20 MA DEMAND SIGNAL

RSET XX.X MA 4-20 MA RESET SIGNAL

CSP XX.X MA 4-20 MA COOLING SETPOINT

ENTER

Table 9 — Outputs Mode and Sub-Mode Directory

Table 10 — Configuration Mode and Sub-Mode Directory

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

GEN.O GENERAL OUTPUTS

C.LWP ON/OFF COOLER PUMP RELAY

C.DWP ON/OFF CONDENSER PUMP

ALRM ON/OFF ALARM RELAY

CDWO ON/OFF CONDENSER VALVE OPEN

CDWC ON/OFF CONDENSER VALVE CLOSE

CIR.A OUTPUTS CIRCUIT A

CC.A1 ON/OFF COMPRESSOR A1 RELAY

D.SOL ON/OFF DIGITAL SCROLL SOLENOID

CC.A2 ON/OFF COMPRESSOR A2 RELAY

CC.A3 ON/OFF COMPRESSOR A3 RELAY

CCH ON/OFF CRANKCASE HEATER RELAY

LLSV ON/OFF LIQUID LINE SOLENOID

MLV.R ON/OFF MINIMUM LOAD VALVE RELAY

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

DISP DISPLAY CONFIGURATION

TEST ON/OFF TEST DISPLAY LEDS

METR ON/OFF METRIC DISPLAY Off = English

On = Metric

LANG X LANGUAGE SELECTION Default: 0

0 = English

1 = Espanol

2 = Francais

3 = Portuguese

PAS.E ENBL/DSBL PASSWORD ENABLE Default: Enable

PASS xxxx SERVICE PASSWORD Default: 1111

UNIT UNIT CONFIGURATION

TYPE x UNIT TYPE 2=WaterCooled

3=Split System

SIZE XX UNIT SIZE

SZA.1 XX COMPRESSOR A1 SIZE Unit Dependent

SZA.2 XX COMPRESSOR A2 SIZE Unit Dependent

SZA.3 XX COMPRESSOR A3 SIZE Unit Dependent

A1.TY No/Yes COMPRESSOR A1 DIGITAL? Default: Yes (A1 Digital Scroll)

MAX.T 0 to 15 MAXIMUM A1 UNLOAD TIME Default: 7

ENTER

Table 10 — Configuration Mode and Sub-Mode Directory (cont)

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

OPT1 UNIT OPTIONS 1 HARDWARE

FLUD X COOLER FLUID

Default: Water

1 = Water

2 = Medium Temperature Brine

MLV.S YES/NO MINIMUM LOAD VALVE SELECT Default: No

R.G.EN ENBL/DSBL RETURN GAS SENSOR ENABLE

OAT.E ENBL/DSBL ENABLE OAT SENSOR

D.G.EN ENBL/DSBL DISCHARGE GAS TEMP ENABLE

CSB.E ENBL/DSBL CSB BOARDS ENABLE

CPC ON/OFF COOLER PUMP CONTROL Default: On

PM.DY XX MIN COOLER PUMP SHUTDOWN DLY 0 to 10 minutes, Default: 1 min.

DPME x ENABLE CONDENSER PUMP 0 to 2

DFLS ENBL/DSBL ENABLE COND FLOW SWITCH

CDWS ENBL/DSBL ENABLE COND WTR SENSORS

OPT2 UNIT OPTIONS 2 CONTROLS

CTRL X CONTROL METHOD Default: Switch

0 = Enable/Off/Remote Switch

2 = Occupancy

3 = CCN Control

LCWT XX.X FHIGH LCW ALERT LIMIT Default: 60

Range: 2 to 60 F

DELY XX MINUTES OFF TIME Default: 0 Minutes

Range: 0 to 15 Minutes

ICE.M ENBL/DSBL ICE MODE ENABLE Default: Disable

CCN CCN NETWORK CONFIGURATION

CCNA XXX CCN ADDRESS Default: 1

Range: 1 to 239

CCNB XXX CCN BUS NUMBER Default: 0

Range: 0 to 239

BAUD X CCN BAUD RATE Default: 9600

1 = 2400

2 = 4800

3 = 9600

4 = 19,200

5 = 38,400

RSET RESET COOL TEMP

CRST X COOLING RESET TYPE Default: No Reset

0 = No Reset

1 = 4 to 20 mA Input

2 = Outdoor Air Temperature

3 = Return Fluid

4 = Space Temperature

MA.DG XX.X F4-20 - DEGREES RESET Default: 0.0F

Range: –30 to 30F

RM.NO XXX.X FREMOTE - NO RESET TEMP Default: 125F (51.7C)

Range: 0° to 125F

RM.F XXX.X FREMOTE - FULL RESET TEMP Default: 0.0F (-17.8C)

Range: 0 to 125F

RM.DG XX.X FREMOTE - DEGREES RESET Default: 0.0F

Range: –30 to 30F

RT.NO XXX.X FRETURN - NO RESET TEMP Default: 10.0F (5.6C)

Range: 0 to 125F COOLER T

RT.F XXX.X FRETURN - FULL RESET TEMP Default: 0.0F (0.0C)

Range: 0 to 125F COOLER T

RT.DG XX.X FRETURN - DEGREES RESET Default: 0.0F

Range: –30 to 30F (–34.4 to -1.1 C)

DMDC X DEMAND LIMIT SELECT Default: None

0 = None

1 = Switch

2 = 4 to 20 mA Input

3 = CCN Loadshed

DM20 XXX % DEMAND LIMIT AT 20 MA Default: 100%

Range: 0 to 100%

SHNM XXX LOADSHED GROUP NUMBER Default: 0

Range: 0 to 99

SHDL XXX % LOADSHED DEMAND DELTA Default: 0%

Range: 0 to 60%

SHTM XXX MAXIMUM LOADSHED TIME Default: 60 minutes

Range: 0 to 120 minutes

DLS1 XXX % DEMAND LIMIT SWITCH 1 Default: 80%

Range: 0 to 100%

DLS2 XXX % DEMAND LIMIT SWITCH 2 Default: 50%

Range: 0 to 100%

ENTER

Table 10 — Configuration Mode and Sub-Mode Directory (cont)

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

RSET

(cont)

LLEN ENBL/DSBL LEAD/LAG CHILLER ENABLE Default: Disable

MSSL SLVE/MAST MASTER/SLAVE SELECT Default: Master

SLVA XXX SLAVE ADDRESS Default: 0

Range: 0 to 239

LLBL X LEAD/LAG BALANCE SELECT

Default: Master Leads

0 = Master Leads

1 = Slave Leads

2 = Automatic

LLBD XXX LEAD/LAG BALANCE DELTA Default: 168 hours

Range: 40 to 400 hours

LLDY XXX LAG START DELAY Default: 5 minutes

Range: 0 to 30 minutes

PARA YES PARALLEL CONFIGURATION Default: YES (CANNOT BE CHANGED)

SLCT SETPOINT AND RAMP LOAD

CLSP X COOLING SETPOINT SELECT Default: Single

0 = Single

1 = Dual Switch

2 = Dual CCN Occupied

3 = 4 to 20 mA Input (requires

EMM)

RL.S ENBL/DSBL RAMP LOAD SELECT Default: Enable

CRMP X.X COOLING RAMP LOADING Default: 1.0

Range: 0.2 to 2.0

SCHD XX SCHEDULE NUMBER Default: 1

Range: 1 to 99

Z.GN X.X DEADBAND MULTIPLIER Default: 1.0

Range: 1.0 to 4.0

SERV SERVICE CONFIGURATION

EN.A1 ENBL/DSBL ENABLE COMPRESSOR A1 Unit dependent

EN.A2 ENBL/DSBL ENABLE COMPRESSOR A2 Unit dependent

EN.A3 ENBL/DSBL ENABLE COMPRESSOR A3 Unit dependent

REV.R ENBL/DSBL REVERSE ROTATION ENABLE Default: Enable

BCST BROADCAST CONFIGURATION

T.D.BC ON/OFF CCN TIME/DATE BROADCAST

OAT.B ON/OFF CCN OAT BROADCAST

G.S.BC ON/OFF GLOBAL SCHEDULE BROADCAST

BC.AK ON/OFF CCN BROADCAST ACK’ER

ENTER

Table 11 — Time Clock Mode and Sub-Mode Directory

* Repeats for Occupancy Periods 2 through 8.

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY SUB-ITEM DISPLAY ITEM

EXPANSION COMMENT

TIME TIME OF DAY

HH.MM XX.XX HOUR AND MINUTE Military (00:00 – 23:59)

DATE MONTH,DATE,DAY AND YEAR

MNTH XX MONTH OF YEAR 1-12 (1 = January, 2 = February, etc)

DOM XX DAY OF MONTH Range: 01-31

DAY X DAY OF WEEK 1-7 (1 = Monday, 2 = Tuesday, etc)

YEAR XXXX YEAR OF CENTURY

DST DAYLIGHT SAVINGS TIME

STR.M XX MONTH Default: 4, Range 1 – 12

STR.W X WEEK Default: 1, Range 1 – 5

STR.D X DAY Default: 7, Range 1 – 7

MIN.A XX MINUTES TO ADD Default: 60, Range 0 – 99

STP.M XX MONTH Default: 10, Range 1 – 12

STP.W XX WEEK Default: 5, Range 1 – 5

STP.D XX DAY Default: 7, Range 1 – 7

MIN.S XX MINUTES TO SUBTRACT Default: 60, Range 0 – 99

HOL.L LOCAL HOLIDAY SCHEDULES HD.01 through HD.30

MON XX HOLIDAY START MONTH Range 0 – 12

DAY XX START DAY Range 0 – 31

LEN XX DURATION (DAYS) Range 0 - 99

SCH.N XX SCHEDULE NUMBER Default: 1, Range 1 – 99

SCH.L LOCAL OCCUPANCY SCHEDULE

PER.1 OCCUPANCY PERIOD 1*

OCC.1 XX:XX PERIOD OCCUPIED TIME Military (00:00 – 23:59)

UNC.1 XX.XX PERIOD UNOCCUPIED TIME Military (00:00 – 23:59)

MON.1 YES/NO MONDAY IN PERIOD

TUE.1 YES/NO TUESDAY IN PERIOD

WED.1 YES/NO WEDNESDAY IN PERIOD

THU.1 YES/NO THURSDAY IN PERIOD

FRI.1 YES/NO FRIDAY IN PERIOD

SAT.1 YES/NO SATURDAY IN PERIOD

SUN.1 YES/NO SUNDAY IN PERIOD

HOL.1 YES/NO HOLIDAY IN PERIOD

OVR SCHEDULE OVERRIDE

OVR.T X TIMED OVERRIDE HOURS Default: 0, Range 0-4 hours

OVR.L X OVERRIDE TIME LIMIT Default: 0, Range 0-4 hours

T.OVR YES/NO TIMED OVERRIDE User Entry

ENTER

Table 12 — Operating Mode and Sub-Mode Directory

LEGEND

Table 13 — Alarms Mode and Sub-Mode Directory

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

MODE MODES CONTROLLING UNIT

MD01 ON/OFF CSM CONTROLLING CHILLER

MD03 ON/OFF MASTER/SLAVE CONTROL

MD05 ON/OFF RAMP LOAD LIMITED

MD06 ON/OFF TIMED OVERRIDE IN EFFECT

MD07 ON/OFF LOW COOLER SUCTION TEMPA

MD09 ON/OFF SLOW CHANGE OVERRIDE

MD10 ON/OFF MINIMUM OFF TIME ACTIVE

MD13 ON/OFF DUAL SETPOINT

MD14 ON/OFF TEMPERATURE RESET

MD15 ON/OFF DEMAND LIMITED

MD16 ON/OFF COOLER FREEZE PROTECTION

MD17 ON/OFF LOW TEMPERATURE COOLING

MD18 ON/OFF HIGH TEMPERATURE COOLING

MD19 ON/OFF MAKING ICE

MD20 ON/OFF STORING ICE

MD21 ON/OFF HIGH SCT CIRCUIT A

MD23 ON/OFF MINIMUM COMP ON TIME

MD24 ON/OFF PUMP OFF DELAY TIME

CSM — Chillervisor System Manager

SCT — Saturated Condensing Temperature

WSM — Water System Manager

SUB-MODE KEYPAD

ENTRY ITEM ITEM

EXPANSION COMMENT

CRNT AXXX OR TXXX CURRENTLY ACTIVE ALARMS Alarms are shown as AXXX.

Alerts are shown as TXXX.

RCRN YES/NO RESET ALL CURRENT ALARMS

HIST AXXX OR TXXX ALARM HISTORY Alarms are shown as AXXX.

Alerts are shown as TXXX.

ENTER

Table 14 — Operating Modes

MODE

NO. ITEM EXPANSION DESCRIPTION

01 CSM CONTROLLING CHILLER Chillervisor System Manager (CSM) is controlling the chiller.

03 MASTER/SLAVE CONTROL Dual Chiller control is enabled.

RAMP LOAD LIMITED Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature

is dropped is limited to a predetermined value to prevent compressor overloading. See Cooling

Ramp Loading (Configuration



SLCT



CRMP). The pull-down limit can be modified, if

desired, to any rate from 0.2° F to 2° F (0.1° to 1° C)/minute.

TIMED OVERRIDE IN EFFECT Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed

schedule, forcing unit to Occupied mode. Override can be implemented with unit under

Local (Enable) or CCN (Carrier Comfort Network®) control. Override expires after each use.

LOW COOLER SUCTION TEMPA Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Sat-

urated Suction Temperature is not increasing greater than 1.1° F (0.6° C) in 10 seconds. If

the saturated suction temperature is less than the Brine Freeze Point (Set Points



FRZ



BR.FZ) minus 6° F (3.4° C) and less than the leaving fluid temperature minus 14° F

(7.8° C) for 2 minutes, a stage of capacity will be removed from the circuit. Or, If the satu-

rated suction temperature is less than the Brine Freeze Point minus 14° F (7.8° C), for

90 seconds, a stage of capacity will be removed from the circuit. The control will continue to

decrease capacity as long as either condition exists.

09 SLOW CHANGE OVERRIDE Slow change override is in effect. The leaving fluid temperature is close to and moving

towards the control point.

10 MINIMUM OFF TIME ACTIVE Chiller is being held off by Minutes Off Time (Configuration



OPT2



DELY).

DUAL SETPOINT Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set Points



COOL



CSP.1) during occupied periods and Cooling Set Point 2 (Set Points



COOL



CSP.2)

during unoccupied periods.

TEMPERATURE RESET Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leav-

ing fluid set point upward and is currently controlling to the modified set point. The set point

can be modified based on return fluid, outdoor-air-temperature, space temperature, or 4 to

20 mA signal.

DEMAND LIMITED Demand limit is in effect. This indicates that the capacity of the chiller is being limited by

demand limit control option. Because of this limitation, the chiller may not be able to pro-

duce the desired leaving fluid temperature. Demand limit can be controlled by switch inputs

or a 4 to 20 mA signal.

COOLER FREEZE PROTECTION Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section

for definition). The chiller will be shut down when either fluid temperature falls below the

Freeze point.

LOW TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and

decreasing faster than -0.5° F per minute. Error between leaving fluid and control point

exceeds fixed amount. Control will automatically unload the chiller if necessary.

HIGH TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing.

Error between leaving fluid and control point exceeds fixed amount. Control will automatically

load the chiller if necessary to better match the increasing load.

19 MAKING ICE Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set Points



COOL





CSP.3) to make ice. The ice done input to the Energy Management Module (EMM) is open.

20 STORING ICE Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set Points



COOL



CSP.2). The ice done input to the Energy Management Module (EMM) is closed.

HIGH SCT CIRCUIT A Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than

the calculated maximum limit. No additional stages of capacity will be added. Chiller capacity

may be reduced if SCT continues to rise to avoid high-pressure switch trips by reducing con-

densing temperature.

MINIMUM COMP ON TIME Cooling load may be satisfied, however control continues to operate compressor to ensure

proper oil return. May be an indication of oversized application, low fluid flow rate or low loop

volume.

PUMP OFF DELAY TIME Cooling load is satisfied, however cooler pump continues to run for the number of minutes set

by the configuration variable Cooler Pump Shutdown Delay (Configuration



OPT1





PM.DY).

CONTROLS

General — The 30MP liquid scroll chillers contain the

ComfortLink™ electronic control system that controls and

monitors all operations of the chiller.

The control system is composed of several components as

listed in the sections below. See Fig. 3 for a typical control box

drawing. See Fig. 4 and 5 for control schematics.

Main Base Board (MBB) — See Fig. 6. The MBB is

the heart of the ComfortLink control system. It contains the

major portion of operating software and controls the operation

of the machine. The MBB continuously monitors input/output

channel information received from its inputs and from all other

modules. The MBB receives inputs from the discharge and

suction pressure transducers and thermistors. See Table 15. The

MBB also receives the feedback inputs from each compressor

current sensor board and other status switches. See Table 16.

The MBB also controls several outputs. Relay outputs con-

trolled by the MBB are shown in Table 17. Information is

transmitted between modules via a 3-wire communication bus

or LEN (Local Equipment Network). The CCN (Carrier Com-

fort Network) bus is also supported. Connections to both LEN

and CCN buses are made at the LVT (low voltage terminal).

Energy Management Module (EMM) — The EMM

module is available as a factory-installed option or as a field-

installed accessory. The EMM module receives 4 to 20 mA

inputs for the leaving fluid temperature reset, cooling set point

and demand limit functions. The EMM module also receives

the switch inputs for the field-installed 2-stage demand limit

and ice done functions. The EMM module communicates the

status of all inputs with the MBB, and the MBB adjusts the

control point, capacity limit, and other functions according to

the inputs received.

Current Sensor Board (CSB) — The CSB is used to

monitor the status of the compressors by measuring current and

providing an analog input to the main base board (MBB).

Enable/Off/Remote Contact Switch — The Enable/

Off/Remote Contact switch is a 3-position switch used to

control the chiller. When switched to the Enable position the

chiller is under its own control. Move the switch to the Off

position to shut the chiller down. Move the switch to the

Remote Contact position and a field-installed dry contact can

be used to start the chiller. The contacts must be capable of

handling a 24 vac, 50-mA load. In the Enable and Remote

Contact (dry contacts closed) positions, the chiller is allowed to

operate and respond to the scheduling configuration, CCN

configuration and set point data. See Fig. 7.

Emergency On/Off Switch — The Emergency On/Off

switch should only be used when it is required to shut the

chiller off immediately. Power to the MBB, EMM, and

marquee display is interrupted when this switch is off and all

outputs from these modules will be turned off. See Fig. 7.

Board Addresses — The main base board (MBB) has a

3-position instance jumper that must be set to ‘1.’ The EMM

board has 4-position DIP switches. All switches are set to ‘On’

for all boards except the AUX2 board. The AUX2 board DIP

switch settings are shown on the wiring schematic.

Control Module Communication

RED LED — Proper operation of the control boards can be

visually checked by looking at the red status LEDs

(light-emitting diodes). When operating correctly, the red status

LEDs should be blinking 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. Be sure that

the main base board (MBB) is supplied with the current soft-

ware. If necessary, reload current software. If the problem still

persists, replace the MBB. A red LED that is lit continuously or

blinking at a rate of once per second or faster indicates that the

board should be replaced.

GREEN LED — The MBB has one green LED. The Local

Equipment Network (LEN) LED should always be blinking

whenever power is on. All other boards have a LEN LED

which should be blinking whenever power is on. Check LEN

connections for potential communication errors at the board J3

and/or J4 connectors. Communication between modules is

accomplished by a 3-wire sensor bus. These 3 wires run in

parallel from module to module. The J4 connector on the MBB

provides both power and communication directly to the

marquee display only.

YELLOW LED — The MBB has one yellow LED. The

Carrier Comfort Network (CCN) LED will blink during times

of network communication.

Carrier Comfort Network® (CCN) Interface —

The 30MP chiller units can be connected to the CCN if

desired. The communication bus wiring is a shielded,

3-conductor cable with drain wire and is supplied and installed

in the field. See Table 18. The system elements are connected

to the communication bus in a daisy chain arrangement. The

positive pin of each system element communication 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 LVT. Consult the CCN Contrac-

tor’s Manual for further information.

NOTE: Conductors and drain wire must be 20 AWG (Ameri-

can 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 temperature range of

–20 C to 60 C is required. Wire manufactured by Alpha (2413

or 5463), American (A22503), Belden (8772), or Columbia

(02525) meets the above mentioned requirements.

It is important when connecting to a CCN communication

bus that a color coding scheme be used for the entire network

to simplify the installation. It is recommended 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 contain-

ing different colored wires.

At each system element, the shields of its communication

bus cables must be tied together. If the communication bus is

entirely within one building, the resulting continuous shield

must be connected to a ground at one point only. If the commu-

nication 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:

1. Turn off power to the control box.

2. Cut the CCN wire and strip the ends of the red (+), white

(ground), and black (–) conductors. (Substitute appropri-

ate colors for different colored cables.)

3. Connect the red wire to (+) terminal on LVT of the plug,

the white wire to COM terminal, and the black wire to the

(–) terminal.

4. The RJ14 CCN connector on LVT can also be used, but is

only intended for temporary connection (for example, a

laptop computer running Service Tool).

LEGEND FOR FIG. 3-5

ALMR — Alarm Relay

AUX — Auxilliary

C—Contactor, Compressor

CB — Circuit Breaker

CCB — Compressor Circuit Breaker

CH — Crankcase Heater

CCH — Crankcase Heater Relay

COMP — Compressor

CR — Control Relay

CSB — Current Sensor Board

CWFS — Chilled Water Flow Switch

CWP — Chilled Water Pump

DGS — Digital Scroll Compressor

DPT — Discharge Pressure Transducer

DTT — Discharge Temperature Thermistor

DUS — Digital Unloader Solenoid

EMM — Energy Management

EWT — Entering Water Temperature

FB — Fuse Block

FIOP — factory Installed Option

FU — Fuse

GND — Ground

HPS — High-Pressure Switch

LLSV — Liquid Line Solenoid Valve

LON — Local Operating Network

LVT — Low Voltage Terminal

LWT — Leaving Water Temperature

MBB — Main Base Board

MLV — Minimum Load Valve

MP — Modular Motor Protection

NEC — National Electrical Code

OAT — Outdoor-Air Thermistor

PL — Plug

RLY — Relay

SPT — Suction Pressure Transducer

SW — Switch

TB — Terminal Block

TRAN — Transformer

UPC — Unitary Protocol Converter

Terminal Block

Terminal (Unmarked)

Terminal (Marked)

Splice

Factory Wiring

Field Wiring

Accessory or Option Wiring

To indicate common potential only; not to represent wiring.

DISCONNECT

OPTION CB1A/TB1A

TRAN1

FB1

CA1 CA2 CA3

CSB-A1 CSB-A2 CSB-A3

CCB-1 CCB-2 CCB-3

CCH

MBB

EMM

LVT

UPC

UPC LON

OPTION

TB3

OFF

SW2

ENABLE

SW1

REMOTE

CONTROL

CB1 CB2 CB3

LOCATED OVER EMM

OFF

L1 L2 L3

EQUIP

GND

246

Fig. 3 — Typical Control Box — 30MP015-045 Units

a30-4963

COMP A2

TRAN1

H2 H3 H4

SECONDARY 24V

RED

BRN

VIO

FU3

SW2

CONNECT FOR

APPROPRIATE

PRIMARY VOLTAGE

SEE TABLE 1

CB1A

TO FUSED

DISCONNECT

PER NEC

OPTIONAL

DISCONNECT

3.2 AMPS

CB3

3T3

GRN/YEL

RED

11 21

12 22

13 23

CA1

BLK

YEL

BLU

11 21

12 22

13 23

CA2

CCB-1

BLK

YEL

BLU

BLK

YEL

BLU

YEL

BLU BLK

YEL

BLU

BLK

CCB-2

BLK

YEL

BLK

015,020,040: 380V,460V,575V ONLY

030,045: 460V,575V ONLY

BLU

YEL

BLU

GRN/YEL

11 21

12 22

13 23

CA3

BLK

YEL

BLU

CCB-3

BLK

YEL

BLU

YEL

BLU

BLK

BLU

YEL

BLK

YEL

CH-A1

BLK

YEL

L1 T1

L2 T2

BLK

YEL

CH-A2

BLK

YEL

CH-A3

BLK

YEL

BLK

015,020,040: 208/230V ONLY

030,045: 202/230V,380V ONLY

MBB

BRN

VIO

UPC FIOP

UPC

GND

HOT

24VAC

BRN

VIO

DGS FIOP

AUX2

BRN

RED

1J2

FIOP/ACCESSORY

EMM

FU1

BLK

FU2

YEL

GRN/YEL

RED

VIO

BRN

PRIMARY

WHT

380V

UNITS ONLY

NOT USED ON

380V UNITS

FB1

BLK

YEL

NOTES:

1. FACTORY WIRING IS IN ACCORDANCE WITH UL 1995 STANDARDS.

ANY FIELD MODIFICATIONS OR ADDITIONS MUST BE IN

COMPLIANCE WITH ALL APPLICABLE CODES.

C MIN WIRE FOR FIELD POWER SUPPLY.

3. ALL FIELD INTERLOCK CONTACTS MUST HAVE A MIN RATING OF

2 AMPS @ 24VAC SEALED. SEE FIELD INTERLOCK WIRING.

4. COMPRESSOR AND FAN MOTORS ARE THERMALLY PROTECTED--

THREE PHASE MOTORS PROTECTED AGAINST PRIMARY SINGLE

PHASE CONDITIONS.

5. TERMINALS 14

& 15 OF LVT ARE FOR FIELD CONNECTION

OF REMOTE ON-OFF. THE CONTACT MUST BE RATED FOR DRY

CIRCUIT APPLICATION CAPABLE OF HANDLING A 5VDC

1 MA TO 20 MA LOAD.

6. FOR 500 SERIES UNIT OPERATION AT 208-3-60V LINE VOLTAGE,

TRAN1 PRIMARY CONNECTIONS MUST BE MOVED TO TERMINALS H3 & H4.

8. MP-A1 NOT USED IN THE FOLLOWING UNITS:

015,020: ALL UNITS

9. MP-A2 NOT USED IN THE FOLLOWING UNITS:

015,020: ALL UNITS

10. MP-A3 NOT USED IN THE FOLLOWING UNITS:

11. JUMPER PLUG REQUIRED WHEN MP NOT USED

WHT

(040,045 ONLY)

VOLTAGE SERIES

TERMINAL

CONNECTIONS

FOR PRIMARY SIDE

575-3-60 100 H1 & H5

380-3-60 200 H1 & H2

230-3-60 500 H2 & H4

208-3-60 500 H3 & H4

460-3-60 600 H1 & H4

TABLE 1

7. MAX LOAD: 5VA SEALED, 10VA INRUSH

(040,045 ONLY)

BLK

YEL

(MPA ONLY)

WHT

BLK

YEL

FU4

FU5

UNIT VOLTAGE REPLACE

WITH

FNQ-R-3

FU1 & FU2

FUSE

NUMBER

380-3-60

TRAN

SIZE

200VA FNQ-R-2

208/230-3-60

FNQ-R-10

FU3 (24V) 380-3-60,460-3-60,575-3-60

250VA

208/230-3-60

460-3-60

575-3-60

FNQ-R-1.5

FU4 & FU5 380-3-60,460-3-60,575-3-60 NONE

208/230-3-60

(040,045 ONLY)(040,045 ONLY)

12. IF CHILLED WATER PUMP INTERLOCK IS USED,

REMOVE JUMPER FROM TERMINAL 16 TO 17 AND

WIRE INTERLOCK CONTACT ACROSS TERMINALS 16 & 17.

030-045: 460V UNITS WITHOUT DIGITAL SCROLL

030-045: 460V UNITS

040,045: 460V UNITS

FNQ-R-3

TB3

380V ONLY

PL11-2

PL11-1

PL12-2

PL12-1

CCH

PL13-2

PL13-1

STANDARD

TERMINAL

BLOCK

PER NEC

TO FUSED DISCONNECT

TB1A

EQUIP GND

COMP A1

COMP A3

380V UNITS ONLY

NEUTRAL

CSB-A1

CSB-A2

CSB-A3

Fig. 4 — Typical Power Wiring Schematic — 30MP015-045 Units

a30-4965

RLY 9

RLY 11

C2C1

BLU

3TB3

SW2

3.2 AMPS

CB2

C2C1

RLY 10

J10A

J10B

RLY 5

RLY 6

RLY 7

RLY 8

RLY 1

RLY 2

RLY 3

RLY 4

RED

BRN

RED

WHT

BLK

RED

WHT

BLK

RED

OFF

MAIN

BASE

BOARD

FIOP/

SPTA

DPTA

M1 M2

ORN

GRA

CCH

CA1

CA2

ORN

RED

SEE NOTE 11

ORN

BLK

GRA

PNK

BLU

ORN

PNK

BLU

ORN

GRA

CSB

RED

ORN

BRN

CSB

RED

ORN

BRN

CSB

RED

ORN

BRN ON

OFF

12345678

DARK = SWITCH LOCATION

DUS

DTT

RED

WHT

BLK

DGS

MBB

RED

EMM

RED

WHT

BLK

RED

WHT

BLK

13 14

ACCESSORY

10 +

COOLING

SETPOINT

4-20mA

RED

LVT

(+)

(-)

(COM)

SHIELD

LEN CCN

NET +

NET 2

SHIELD

NET +

NET -

N/C

SIGNAL

PORT 1A

UPC

PORT 2

LON

OPTION

GND

NET

UPC OPT

BLK

WHT

RED

BLK

WHT

BLU

VIO

RED

WHT

BLK

RED

BRN

RED

WHT

BLK

REMOTE

ON-OFF

SWITCH

(SEE

NOTE 5)

ENABLE

SW1

GRN

RED

BLK

GRN

RED

BLK

BLU

VIO

RED

BLU

PNK

ORN

BRN

VIO

TEMP

RESET

4-20mA

DEMAND

LIMIT

4-20mA

DLS STEP 2

3.2 AMPS

CB1

TRAN1

SECONDARY 24V

RED FU3 X1

XF BRN

GRN/YEL

LVT

RED

ORN

BRN PL1-4

VIO

BRN

RED

BLK

CH1

CH11

DLS STEP 1

LVT

GRA

ICE DONE

(040,045 ONLY)

LVT

T-55

ACCSY

SEN

OAT ACCESSORY OR

DUAL CHILLER LWT

CONDENSER EWT

ACCESSORY

CONDENSER LWT

ACCESSORY

BLK

RED COOLER ENTERING

FLUID TEMP

BLK

RED COOLER LEAVING

FLUID TEMP

MLV-A

MLV FIOP

C2C1

M1 M2 VIO CA3

SEE NOTE 11

VIO

BRN LLSV-A

(MPA ONLY)

LLSV-A

RED

(MPA AND BRINE ONLY)

BLK

ORN

118

LVT

ALARM RELAY

SEE NOTE 7

ALMR

CWP RELAY

SEE NOTE 7

CONDENSER FAN/PUMP RELAY

SEE NOTE 7

BLK

WHT

RED

CWFS

VIO

ORN

CNFS

CNPI

RED

DUAL

SETPOINT

BLU

TB3

CONDENSER

WATER

VALVE

(MPB ONLY)

BRN

FIOP

RGTA

ACCESSORY

CWPI

(SEE

NOTE

12)

T2 T1

MP-A1

T2 T1

MP-A2

T2 T1

MP-A3

CWFS

SEE NOTE 8

SEE NOTE 9

SEE NOTE 10

ORN

1TB3

PNK

BLK

BRN PL2-4

BRN MLV-A

BRN TRAN1

BRN CWFS-3

BLK

WHT

RED MARQUEE

DISPLAY

RED

BRN

BLK

WHT

RED

BRN

RED

BRN MLV-A

BRN CA3

BRN PL2-4

BRN PL3-4

BRN CCH

PNK

2TB3

BRN

BRN CA1

BRN CA2

BRN CA3

(040,045 ONLY)

BRN LLSV-A

MP-A1

VIO

PL1-2PL1-1

VIO

MP-A2

VIO

PL2-2PL2-1

VIO

J13

J11

J10

J12 T55

BRN

GRA

MP-A3

VIO

PL3-2PL3-1

VIO

PNK

BLK

HPS-A

J11

J12

BLK

WHT

BRN

GRA

RED

PL1-3

PNK RED

PL1-4

BRN

PL2-3

PNK RED

PL3-3

PNK RED

PNK BRN

PL2-4

BRN

PL3-4

BRN

BLU

AUX2

Fig. 5 — Typical Control Wiring Schematic — 30MP015-045 Units a30-4966

Table 15 — Thermistor Designations

LEGEND

Table 16 — Status Inputs

Table 17 — Output Relays

Table 18 — CCN Communication Bus Wiring

Sensors — The electronic control uses 2 to 7 thermistors to

sense temperatures for controlling chiller operation. See

Table 15. These sensors are outlined below. Thermistors

RGTA, CNDE, CNDL, EWT, LWT, and OAT are identical in

temperature versus resistance and voltage drop performance.

The dual chiller thermistor (DLWT) is 5 k at 77 F (25 C)

thermistor. Space temperature thermistor (SPT) is a 10 kat

77 F (25 C). See Thermistors section for temperature-resis-

tance-voltage drop characteristics.

COOLER LEAVING FLUID SENSOR (LWT) — The thermis-

tor is installed in a well in the factory-installed leaving fluid

piping coming from the bottom of the brazed-plate heat

exchanger.

COOLER ENTERING FLUID SENSOR (EWT) — The therm-

istor is installed in a well in the factory-installed entering fluid

piping coming from the top of the brazed-plate heat exchanger.

CONDENSER LEAVING FLUID SENSOR (CNDL) — The

thermistor is installed in a well in the factory-installed leaving

fluid piping coming from the bottom of the brazed-plate heat

exchanger.

COOLER ENTERING FLUID SENSOR (CNDE) — The therm-

istor is installed in a well in the factory-installed entering fluid

piping coming from the top of the brazed-plate heat exchanger.

COMPRESSOR RETURN GAS TEMPERATURE SEN-

SOR (RGTA) — This accessory thermistor can be installed in

a well located in the suction line.

OUTDOOR-AIR TEMPERATURE SENSOR (OAT) —

This sensor is an accessory that is remotely mounted and used

for outdoor air temperature reset. See Table 15.

DUAL LEAVING WATER TEMPERATURE SENSOR

(DLWT) — This input can be connected to the LVT. See Ta-

ble 15. For dual chiller applications (parallel only are support-

ed), connect the dual chiller leaving fluid temperature sensor

(5 kthermistor, Carrier part no. HH79NZ029) to the outside

air temperature input of the Master chiller. If outside air tem-

perature is required for reset applications, connect the sensor to

the Slave chiller and configure the slave chiller to broadcast the

value to the Master chiller.

REMOTE SPACE TEMPERATURE SENSOR (SPT) —

The sensor (part no. 33ZCT55SPT) is an accessory sensor that

is remotely mounted in the controlled space and used for space

temperature reset. The sensor should be installed as a wall-

mounted thermostat would be (in the conditioned space where

it will not be subjected to either a cooling or heating source or

direct exposure to sunlight, and 4 to 5 ft above the floor).

Space temperature sensor wires are to be connected to

terminals in the unit main control box. The space temperature

sensor includes a terminal block (SEN) and a RJ11 female

connector. The RJ11 connector is used access into the Carrier

Comfort Network® (CCN) at the sensor.

To connect the space temperature sensor (Fig. 8):

1. Using a 20 AWG twisted pair conductor cable rated for

the application, connect 1 wire of the twisted pair to one

SEN terminal and connect the other wire to the other

SEN terminal located under the cover of the space

temperature sensor.

2. Connect the other ends of the wires to terminals 3 and 4

on LVT located in the unit control box.

Units on the CCN can be monitored from the space at the

sensor through the RJ11 connector, if desired. To wire the RJ11

connector into the CCN (Fig. 9):

1. Cut the CCN wire and strip ends of the red (+), white

(ground), and black (–) conductors. (If another wire color

scheme is used, strip ends of appropriate wires.)

IMPORTANT: A shorted CCN bus cable will prevent some

routines from running and may prevent the unit from start-

ing. 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.

THERMISTOR

CONNECTION

POINT

THERMISTOR INPUT

CLWT J8-13,14 (MBB) Cooler Leaving Fluid

CEWT J8-11,12 (MBB) Cooler Entering Fluid

RGTA J8-9,10 (MBB) Circuit A Return Gas

Temperature (accessory)

OAT

J8-6,7 (MBB),

LVT 4,13

Outdoor-Air Temperature

Sensor (accessory) or Dual

LWT Sensor

SPT J8-5,6 (MBB)

LVT-3 , 4

Accessory Remote Space

Temperature Sensor

CNDE J8-1,2 Condenser Entering Water

Temperature Sensor

CNDL J8-3,4 Condenser Leaving Water

Temperature Sensor

LWT — Leaving Water Temperature

MBB — Main Base Board

STATUS SWITCH PIN CONNECTION POINT

Condenser Flow Switch LVT-11,17, J7-2, J6-2

Dual Set Point LVT-12,13, J7-3,4

Remote On/Off LVT-14,15

Cooler Flow Switch Interlock LVT-16,17, J6-2, J7-10

Compressor Fault Signal, A1 J9-11,12

Compressor Fault Signal, A2 J9-5,6

Compressor Fault Signal, A3 J9-8,9

RELAY

NO. DESCRIPTION

K1 Energize Compressor A1

K2 Energize Compressor A2

K3 Energize Compressor A3

K4 Energize Minimum Load Valve

K5 Water Valve Open

K6 Water Valve Close

K7 Liquid Line Solenoid Valve

K8 Crankcase Heater Relay (30MPA Only)

K9 Chilled Water Pump

K10 Condenser Fan/Pump

K11 Alarm Relay

MANUFACTURER PART N O.

Regular Wiring Plenum Wiring

Alpha 1895 —

American A21451 A48301

Belden 8205 884421

Columbia D6451 —

Manhattan M13402 M64430

Quabik 6130 —

IMPORTANT: The cable selected for the RJ11 connector

wiring MUST be identical to the CCN communication bus

wire used for the entire network. Refer to Table 18 for

acceptable wiring.

CEPL130346-01

STATUS

LEN

J1 J2

J4 J3

J7 J8 J9

J10

CCN

RED LED - STATUS GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK)

YELLOW LED -

CCN (CARRIER COMFORT NETWORK)

INSTANCE JUMPER

K11 K10 K9

K8 K7 K6 K5

K4 K3 K2 K1

Fig. 6 — Main Base Board

Fig. 7 — Enable/Off/Remote Contact Switch, and Emergency On/Off Switch Locations

SPT (T10) PART NO. 33ZCT55SPT

SENSOR

SEN SEN LVT

Fig. 8 — Typical Space Temperature

Sensor Wiring

T-55 SPACE

SENSOR

CCN+

CCN GND

CCN-

TO CCN

COMM 1

BUS (PLUG)

AT UNIT

Fig. 9 — CCN Communications Bus Wiring

to Optional Space Sensor RJ11 Connector

a30-4967

a30-4968

2. Insert and secure the red (+) wire to terminal 5 of the

space temperature sensor terminal block.

3. Insert and secure the white (ground) wire to terminal 4 of

the space temperature sensor.

4. Insert and secure the black (–) wire to terminal 2 of the

space temperature sensor.

5. Connect the other end of the communication bus cable to

the remainder of the CCN communication bus.

Energy Management Module (Fig. 10) — This

factory-installed option (FIOP) or field-installed accessory is

used for the following types of temperature reset, demand

limit, and/or ice features:

• 4 to 20 mA leaving fluid temperature reset (requires

field-supplied 4 to 20 mA generator)

• 4 to 20 mA cooling set point reset (requires field-

supplied 4 to 20 mA generator)

• Discrete inputs for 2-step demand limit (requires field-

supplied dry contacts capable of handling a 24 vac,

50 mA load)

• 4 to 20 mA demand limit (requires field-supplied 4 to

20 mA generator)

• Discrete input for Ice Done switch (requires field-

supplied dry contacts capable of handling a 24 vac,

50 mA load)

See Demand Limit and Temperature Reset sections on

pages 27 and 31 for further details.

Loss-of-Cooler Flow Protection — A proof-of-

cooler flow device is factory installed in all chillers.

Condenser Flow Protection — A proof-of-condens-

er flow protection accessory can be field installed in the con-

denser water piping of all chillers. The unit must be configured

for the input to be enabled.

Thermostatic Expansion Valves (TXV) — All

units are equipped from the factory with conventional TXVs.

The 30MPA units and 30MPW units with medium temperature

brine also have factory-installed liquid line solenoids. The liq-

uid line solenoid valves are not intended to be a mechanical

shut-off. For 30MPW units, when service is required, reclaim

the refrigerant from the system.

For 30MPA units when service is required, the compressor

and evaporator can be serviced by closing the factory-installed

liquid line service valve and field-installed discharge line ser-

vice valve. After the valves are closed, reclaim the refrigerant

from the system.

The TXV is set at the factory to maintain approximately 8 to

12° F (4.4 to 6.7° C) suction superheat leaving the cooler by

monitoring the proper amount of refrigerant into the cooler. All

TXVs are adjustable, but should not be adjusted unless abso-

lutely necessary.

Capacity Control — The control system cycles com-

pressors, digital scroll modulting solenoid (if equipped), and

minimum load valve solenoids (if equipped) to maintain the

user-configured leaving chilled fluid temperature set point. En-

tering fluid temperature is used by the main base board (MBB)

to determine the temperature drop across the cooler and is used

in determining the optimum time to add or subtract capacity

stages. The chilled fluid temperature set point can be automati-

cally reset by the return fluid temperature, space, or outdoor-air

temperature reset features. It can also be reset from an external

4 to 20-mA signal (requires energy management module FIOP

or accessory).

The capacity control algorithm runs every 30 seconds. The

algorithm attempts to maintain the Control Point at the desired

set point. Each time it runs, the control reads the entering and

leaving fluid temperatures. The control determines the rate at

which conditions are changing and calculates 2 variables based

on these conditions. Next, a capacity ratio is calculated using

the 2 variables to determine whether or not to make any

changes to the current stages of capacity. This ratio value

ranges from –100 to +100%. If the next stage of capacity is a

compressor, the control starts (stops) a compressor when the

ratio reaches +100% (–100%). If installed, the minimum load

valve solenoid will be energized with the first stage of capacity.

Minimum load valve value is a fixed 30% in the total capacity

calculation. The control will also use the minimum load valve

solenoid as the last stage of capacity before turning off the last

compressor. A delay of 90 seconds occurs after each capacity

step change. Refer to Table 19.

MINUTES LEFT FOR START — This value is displayed

only in the network display tables (using Service Tool,

ComfortVIEW™ or ComfortWORKS® software) and

represents the amount of time to elapse before the unit will start

its initialization routine. This value can be zero without the

machine running in many situations. This can include being

unoccupied, ENABLE/OFF/REMOTE CONTACT switch in

the OFF position, CCN not allowing unit to start, Demand

Limit in effect, no call for cooling due to no load, and alarm or

alert conditions present. If the machine should be running and

none of the above are true, a minimum off time (DELY, see

below) may be in effect. The machine should start normally

once the time limit has expired.

MINUTES OFF TIME (Configuration



OPT2



DELY) — This user-configurable time period is used by the

control to determine how long unit operation is delayed after

power is applied/restored to the unit. Typically, this time period

is configured when multiple machines are located on a single

site. For example, this gives the user the ability to prevent all

the units from restarting at once after a power failure. A value

of zero for this variable does not mean that the unit should be

running.

LEAD/LAG DETERMINATION — This is a configurable

choice and is factory set to be automatic for all units unless the

unit is equipped with minimum load, then circuit A is lead

(Configuration



OPT2



LLCS). The value can be changed

to Circuit A or Circuit B leading as desired. Set at automatic,

the control will sum the current number of logged circuit starts

and one-quarter of the current operating hours for each circuit.

The circuit with the lowest sum is started first. Changes to

which circuit is the lead circuit and which is the lag are also

made when total machine capacity is at 100% or when there is

a change in the direction of capacity (increase or decrease) and

each circuit’s capacity is equal.

CAPACITY CONTROL OVERRIDES — The following over-

rides will modify the normal operation of the routine.

Deadband Multiplier — The user configurable Deadband

Multiplier (Configuration



SLCT



Z.GN) has a default

value of 1.0. The range is from 1.0 to 4.0. When set to other

than 1.0, this factor is applied to the capacity Load/Unload

Factor. The larger this value is set, the longer the control will

delay between adding or removing stages of capacity. Figure

11 shows how compressor starts can be reduced over time if

the leaving water temperature is allowed to drift a larger

amount above and below the set point. This value should be set

in the range of 3.0 to 4.0 for systems with small loop volumes.

Figure 12 shows the operating envelope for the compressor.

CAUTION

Care should be taken when interfacing with other manufac-

turer’s control systems due to possible power supply

differences, full wave bridge versus half wave rectification.

The two different power supplies cannot be mixed.

ComfortLink™ controls use half wave rectification. A

signal isolation device should be utilized if a full wave

bridge signal generating device is used.

First Stage Override — If the current capacity stage is zero,

the control will modify the routine with a 1.2 factor on adding

the first stage to reduce cycling. This factor is also applied

when the control is attempting to remove the last stage of

capacity.

Slow Change Override — The control prevents the capacity

stages from being changed when the leaving fluid temperature

is close to the set point (within an adjustable deadband) and

moving towards the set point.

Table 19 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve

*Hot gas bypass (minimum load) valve energized. NOTE: These capacity steps may vary due to different capacity

staging sequences.

30MP UNIT SIZE CONTROL

STEPS

CAPACITY STEPS

(% Displacement)

015

18*

100

020

25*

100

030

34*

100

040

21*

100

045

22*

100

CEBD430351-0396-01C

TEST 1

CEPL130351-01

PWR

TEST 2

J1 J2

J4 J3

LEN

STATUS

RED LED - STATUS GREEN LED -

LEN (LOCAL EQUIPMENT NETWORK) ADDRESS

DIP SWITCH

Fig. 10 — Energy Management Module

Ramp Loading — Ramp loading (Configura-

tion



SLCT



CRMP) limits the rate of change of leaving

fluid temperature. If the unit is in a Cooling mode and config-

ured for Ramp Loading, the control makes 2 comparisons be-

fore deciding to change stages of capacity. The control calcu-

lates a temperature difference between the control point and

leaving fluid temperature. If the difference is greater than 4° F

(2.2° C) and the rate of change (°F or °C per minute) is more

than the configured Cooling Ramp Loading value (CRMP),

the control does not allow any changes to the current stage of

capacity.

Low Entering Fluid Temperature Unloading — When the

entering fluid temperature is below the control point, the

control will attempt to remove 25% of the current stages being

used. If exactly 25% cannot be removed, the control removes

an amount greater than 25% but no more than necessary. The

lowest stage will not be removed.

Hot Gas Bypass — If equipped, the hot gas bypass valve is

energized only when one compressor is running on circuit A. If

the close control feature is enabled the hot gas bypass valve

may be used as needed to obtain leaving fluid temperature

close to set point.

Cooler Freeze Protection — The control will try to prevent

shutting the chiller down on a Cooler Freeze Protection alarm

by removing stages of capacity. If the cooler fluid selected

is Water, the freeze point is 34 F (1.1 C). If the cooler fluid

selected is Brine, the freeze point is the Brine Freeze Point (Set

Points



FRZ



BR.FZ). This alarm condition (A207) only

references leaving fluid temperature and NOT Brine Freeze

point. If the cooler leaving fluid temperature is less than the

freeze point plus 2.0° F (1.1° C), the control will immediately

remove one stage of capacity. This can be repeated once every

30 seconds.

Low Saturated Suction Protection — The control will try to

prevent shutting a circuit down due to low saturated suction

conditions by removing stages of capacity. The circuit alert

condition (T116) compares saturated suction temperature to the

configured Brine Freeze Point (Set Points



FRZ



BR.FZ).

The Brine Freeze point is a user-configurable value that must

be left at 34 F (1.1 C) for 100% water systems. A lower value

0 200 400 600 800 1000

TIME (SECONDS)

2 STARTS

3 STARTS

DEADBAND EXAMPLE

LWT (F)

MODIFIED

DEADBAND

STANDARD

DEADBAND

LWT (C)

LEGEND

LWT — Leaving Water Temperature

Fig. 11 — Deadband Multiplier

170

130

140

150

160

110

120

130

100

-30 -20 -10 0 10 20 304050607080

SCT (F)

SST (F)

LEGEND

Fig. 12 — Operating Envelope for R-410A Compressor

SCT — Saturated Condensing Temperature

SST — Saturated Suction Temperature

a30-4969

may be entered for systems with brine solutions, but this value

should be set according to the freeze protection level of the

brine mixture. Failure to properly set this brine freeze point val-

ue may permanently damage the brazed plate heat exchanger.

The control will initiate Mode 7 (Circuit A) to indicate a cir-

cuit’s capacity is limited and that eventually the circuit may

shut down.

Operation of Machine Based on Control

Method and Cooling Set Point Selection Set-

tings — Machine On/Off control is determined by the

configuration of the Control Method (Configuration



OPT2



CTRL) and Cooling Set Point Select

(Configuration



SLCT



CLSP) variables. All units are fac-

tory configured with Cooling Set Point Select set to 0 (single

set point). With the control method set to 0, simply switching

the Enable/Off/Remote Contact switch to the Enable or

Remote Contact position (external contacts closed) will put the

chiller in an occupied state. The control mode (Run

Status



VIEW



STAT) will be 1 (OFF LOCAL) when the

switch is Off and will be 5 (ON LOCAL) when in the Enable

position or Remote Contact position with external contacts

closed.

Two other control methods are available for Machine On/

Off control:

OCCUPANCY SCHEDULE (Configuration



OPT2



CTRL = 1) — The main base board will use the operating

schedules as defined under the Time Clock mode in the scroll-

ing marquee display. These schedules are identical. The sched-

ule number must be set to 1 for local schedule.

The schedule number can be set anywhere from 65 to 99

for operation under a CCN global schedule. The Enable/Off/

Remote Contact must be in the Enable or Remote Contact posi-

tion. The control mode (Run Status



VIEW



STAT) will be

1 when the switch is Off. The control mode will be 3 when the

Enable/Off/Remote Contact switch input is On and the time of

day is during an unoccupied period. Similarly, the control

mode will be 7 when the time of day is during an occupied

period.

CCN SCHEDULE (Configuration



OPT2



CTRL =

2) — An external CCN device such as Chillervisor System

Manager controls the On/Off state of the machine. This CCN

device forces the variable ‘CHIL_S_S’ between Start/Stop to

control the chiller. The control mode (Run Status



VIEW



STAT) will be 1 when the switch is Off. The con-

trol mode will be 2 when the Enable/Off/Remote Contact

switch input is On and the CHIL_S_S variable is ‘Stop.’

Similarly, the control mode will be 6 when the CHIL_S_S vari-

able is ‘Start.’

Table 20 illustrates how the control method and cooling set

point select variables direct the operation of the chiller and the

set point to which it controls. The illustration also shows the

ON/OFF state of the machine for the given combinations.

Cooling Set Point Select

SINGLE — Unit operation is based on Cooling Set Point 1

(Set Points



COOL



CSP.1).

DUAL SWITCH — Unit operation is based on Cooling Set

Point 1 (Set Points



COOL



CSP.1) when the Dual Set

Point switch contacts are open and Cooling Set Point 2 (Set

Points



COOL



CSP.2) when they are closed.

DUAL CCN OCCUPIED — Unit operation is based on

Cooling Set Point 1 (Set Points



COOL



CSP.1) during the

Occupied mode and Cooling Set Point 2 (Set

Points



COOL



CSP.2) during the Unoccupied mode as

configured under the local occupancy schedule accessible only

from CCN. Schedule Number in Table SCHEDOVR (See Ap-

pendix B) must be configured to 1. If the Schedule Number is

set to 0, the unit will operate in a continuous 24-hr Occupied

mode. Control method must be configured to 0 (switch). See

Table 20.

4 TO 20 mA INPUT — Unit operation is based on an external

4 to 20 mA signal input to the Energy Management Module

(EMM).

Cooler Pump Control — The AquaSnap® 30MP ma-

chines are configured with the Cooler Pump Control (Configu-

ration



OPT1



CPC) = ON.

The maximum load allowed for the Chilled Water Pump

Starter is 5 VA sealed, 10 VA inrush at 24 volts. The starter coil

is powered from the chiller control system. The starter should

be wired between LVT 24 and TB3-1. If equipped, the field-in-

stalled chilled water pump starter auxiliary contacts should be

connected in series with the chilled water flow switch between

LVT 16 and LVT 17.

Ice Mode — When Ice Mode is enabled Cooling Setpoint

Select must be set to Dual Switch, Dual 7 day or Dual CCN

Occupied and the Energy Management Module (EMM) must

be installed. Unit operation is based on Cooling Setpoint 1

(CSP.1) during the Occupied mode, Ice Setpoint (CSP.3) dur-

ing the Unoccupied mode with the Ice Done contacts open and

Cooling Setpoint 2 (CSP.2) during the Unoccupied mode with

the Ice Done contacts closed. These 3 set points can be utilized

to develop your specific control strategy.

Service Test (See Table 4) — Both main power and

control circuit power must be on.

The Service Test function should be used to verify proper

operation of condenser output, compressors, minimum load

valve solenoid (if installed), cooler pump, and remote alarm re-

lay. To use the Service Test mode, the Enable/Off/Remote Con-

tact switch must be in the OFF position. Use the display keys

and Table 4 to enter the mode and display TEST. Press

twice so that OFF flashes. Enter the password if re-

quired. Use either arrow key to change the TEST value to the

ON position and press . Press and the

button to enter the OUTS or COMP sub-mode.

Table 20 — Control Methods and Cooling Set Points

*Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.

†Cooling set point determined from 4 to 20 mA input to energy management module (EMM) to terminals TB6-3,5.

ENTER

ESCAPE

CONTROL

TYPE

(CTRL)

OCCUPANCY

STATE

COOLING SET POINT SELECT (CLSP)

(single)

(dual, switch)

(dual, occ)

(4 to 20 mA)

0 (switch) Occupied ON,CSP1 ON* ON,CSP1 ON†

Unoccupied ON,CSP1 ON* ON,CSP2 ON

2 (Occupancy) Occupied ON,CSP1 ON* Illegal ON†

Unoccupied OFF OFF Illegal OFF

3 (CCN) Occupied ON,CSP1 ON* ON,CSP1 ON†

Unoccupied ON,CSP1 ON* ON,CSP2 ON†

Test the condenser output, cooler pump, liquid line solenoid

valve (30MPA only), crankcase heater, water valve (accesso-

ry), and alarm relay by changing the item values from OFF to

ON. These discrete outputs are then turned off if there is no

keypad activity for 10 minutes. When testing compressors,

lead compressor must be started first. All compressor outputs

can be turned on, but the control will limit the rate by staging

one compressor per minute. Minimum load valve can be tested

with the compressors on or off. The relays under the COMP

mode will stay on for 10 minutes if there is no keypad activity.

Compressors will stay on until they are turned off by the opera-

tor. The Service Test mode will remain enabled for as long as

there is one or more compressors running. All safeties are mon-

itored during this test and will turn a compressor, circuit or the

machine off if required. Any other mode or sub-mode can be

accessed, viewed, or changed during the TEST mode. The

STAT item (Run Status



VIEW) will display “0” as long as

the Service mode is enabled. The TEST sub-mode value must

be changed back to OFF before the chiller can be switched to

Enable or Remote contact for normal operation.

Cooler Pump Sequence of Operation — At any-

time the unit is in an ON status, as defined by the one of the

following conditions, the cooler pump relay will be enabled.

1. The Enable-Off-Remote Switch in ENABLE,

(CTRL=0).

2. Enable-Off-Remote Switch in REMOTE with a

Start-Stop remote contact closure (CTRL=0).

3. An Occupied Time Period from an Occupancy Schedule

in combination with items 1 or 2 (CTRL=2).

4. A CCN Start-Stop Command to Start in combination

with items 1 or 2 (CTRL=3).

There are certain alarm conditions and Operating Modes

that will turn the cooler pump relay ON. This sequence will de-

scribe the normal operation of the pump control algorithm.

When the unit cycles from an "On" state to an "Off' state,

the cooler pump output will remain energized for the Cooler

Pump Shutdown Delay (Configuration



OPT1



PM.DY).

This is configurable from 0 to 10 minutes. The factory default

is 1 minute. If the pump output was deenergized during the

transition period, the pump output will not be energized.

The Cooler Pump Relay will be energized when the ma-

chine is "On." The chilled water pump interlock circuit consists

of a chilled water flow switch and a field-installed chilled water

pump interlock. If the chilled water pump interlock circuit does

not close within five (5) minutes of starting, an A200 - Cooler

Flow/Interlock failed to close at Start-Up alam1 will be gener-

ated and chiller will not be allowed to start.

If the chilled water pump interlock or chilled water flow

switch opens for at least three (3) seconds after initially being

closed, an A201 - Cooler Flow 1 Interlock Contacts Opened

During Normal Operation alarm will be generated and the ma-

chine will stop.

Condenser Pump/Condenser Fan Output Con-

trol — The main base board (MBB) has the capability to

control either a condenser fan output or a condenser pump out-

put depending on the unit configuration.

If the unit is configured for Configuration



UNIT



TYPE = 2 (air cooled), then the output will be off as

long as capacity is equal to 0 and will be energized 5 seconds

before a compressor is started and remain energized until ca-

pacity is 0 again.

If the unit is configured for Configuration



UNIT



TYPE = 3 (water cooled), then the output will be used

for consenser pump control and additional configuration is re-

quired. To enable the condenser pump control use Configura-

tion



OPT1



DPME. The pump can be configured for no

pump control, on when occupied, and on when capacity is

greater than 0.

Configuring and Operating Dual Chiller Con-

trol — The dual chiller routine is available for the control of

two units supplying chilled fluid on a common loop. This

control algorithm is designed for parallel fluid flow arrangement

only. One chiller must be configured as the master chiller, the

other as the slave. An additional leaving fluid temperature

thermistor (Dual Chiller LWT) must be installed as shown in

Fig. 13 and 14 and connected to the master chiller. Refer to Sen-

sors section, page 19, for wiring. The CCN communication bus

must be connected between the two chillers. Connections can be

made to the CCN screw terminals on LVT. Refer to Carrier

Comfort Network® Interface section, page 14, for wiring infor-

mation. Configuration examples are shown in Tables 21 and 22.

Refer to Table 21 for dual chiller configuration. In this

example the master chiller will be configured at address 1 and

the slave chiller at address 2. The master and slave chillers

must reside on the same CCN bus (Configuration



CCN



CCNB) but cannot have the same CCN address (Configu-

ration



CCN



CCNA). Both master and slave chillers must

have Lead/Lag Chiller Enable (Configuration



RSET



LLEN) configured to ENBL. Master/Slave Select (Config-

uration



RSET



MSSL) must be configured to MAST for

the master chiller and SLVE for the slave. Also in this example,

the master chiller will be configured to use Lead/Lag Balance

Select (Configuration



RSET



LLBL) and Lead/Lag Bal-

ance Delta (Configuration



RSET



LLBD) to even out the

chiller run-times weekly. The Lag Start Delay (Configura-

tion



RSET



LLDY) feature will be set to 10 minutes. This

will prevent the lag chiller from starting until the lead chiller

has been at 100% capacity for the length of the delay time. Par-

allel configuration (Configuration



RSET



PARA) can

only be configured to YES. The variables LLBL, LLBD and

LLDY are not used by the slave chiller.

Dual chiller start/stop control is determined by configura-

tion of Control Method (Configuration



OPT1



CTRL) of

the Master chiller. The Slave chiller should always be config-

ured for CTRL=0 (Switch). If the chillers are to be controlled

by Remote Contacts, both Master and Slave chillers should be

enabled together. Two separate relays or one relay with

two sets of contacts may control the chillers. The Enable/Off/

Remote Contact switch should be in the Remote Contact

position on both the Master and Slave chillers. The Enable/Off/

Remote Contact switch should be in the Enable position for

CTRL=2 (Occupancy) or CTRL=3 (CCN Control).

Both chillers will stop if the Master chiller Enable/Off/

Remote Contact switch is in the Off position. If the Emergency

Stop switch is turned off or an alarm is generated on the Master

chiller the Slave chiller will operate in a Stand-Alone mode.

If the Emergency Stop switch is turned off or an alarm is

generated on the Slave chiller the Master chiller will operate in

a Stand-Alone mode.

The master chiller controls the slave chiller by changing its

Control Mode (Run Status



VIEW



STAT) and its operat-

ing setpoint or Control Point (Run Status



VIEW



CT.PT).

MASTER

CHILLER

SLAVE

CHILLER

LEAVING

FLUID

RETURN

FLUID

THERMISTOR

WIRING*

INSTALL DUAL CHILLER LWT

LEAVING FLUID TEMPERATURE

THERMISTOR (T10) HERE

*Depending on piping sizes, use either:

• HH79NZ014 sensor/10HB50106801 well (3-in. sensor/well)

• HH79NZ029 sensor/10HB50106802 well (4-in. sensor/well)

Fig. 13 — Dual Chiller Thermistor Location

Table 21 — Dual Chiller Configuration (Master Chiller Example)

SUB-MODE ITEM KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTS

DISP

UNIT

OPT1

OPT2

CTRL CONTROL METHOD

CTRL 0 SWITCH DEFAULT 0

OPT2

CCN

CCNA 1 CCN ADDRESS DEFAULT 1

CCNB

CCNB 0 CCN BUS NUMBER DEFAULT 0

CCN

RSET PROCEED TO

SUBMODE RESET

RSET CRST COOLING RESET TYPE

LLEN LEAD/LAG CHILLER ENABLE 15 ITEMS

LLEN DSBL SCROLLING STOPS

DSBL VALUE FLASHES

ENBL SELECT ENBL

LLEN ENBL LEAD/LAG CHILLER ENABLE CHANGE ACCEPTED

LLEN

MSSL MASTER /SLAVE SELECT

MSSL MAST MASTER /SLAVE SELECT DEFAULT MAST

MSSL

SLVA SLAVE ADDRESS

SLVA 0 SCROLLING STOPS

0 VALUE FLASHES

2 SELECT 2

SLVA 2 SLAVE ADDRESS CHANGE ACCEPTED

SLVA

LLBL LEAD/LAG BALANCE SELECT

LLBL 0 SCROLLING STOPS

0 VALUE FLASHES

2 SELECT 2 - Automatic

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

Table 21 — Dual Chiller Configuration (Master Chiller Example) (cont)

NOTES:

1. Master Control Method (CTRL) can be configured as 0-Switch, 2-Occupancy or 3-CCN.

2. Parallel Configuration (PARA) cannot be changed.

Temperature Reset — The control system is capable of

handling leaving-fluid temperature reset based on return cooler

fluid temperature. Because the change in temperature through

the cooler is a measure of the building load, the return tempera-

ture reset is in effect an average building load reset method.

The control system is also capable of temperature reset based

on outdoor-air temperature (OAT), space temperature (SPT), or

from an externally powered 4 to 20 mA signal. Accessory sen-

sors must be used for SPT reset (33ZCT55SPT) and for OAT

reset (HH79NZ014). The energy management module (EMM)

must be used for temperature reset using a 4 to 20 mA signal.

See Tables 23 and 24.

SUB-MODE ITEM KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTS

RSET LLBL 2 LEAD/LAG BALANCE SELECT CHANGE ACCEPTED

LLBL

LLBD LEAD/LAG BALANCE DELTA

LLBD 168 LEAD/LAG BALANCE DELTA DEFAULT 168

LLBD

LLDY LAG START DELAY

LLDY 5 SCROLLING STOPS

5 VALUE FLASHES

10 SELECT 10

LLDY 10 LAG START DELAY CHANGE ACCEPTED

LLDY

RSET

PARA YES MASTER COMPLETE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

1/4 N.P.T.

0.505/0.495

0.61

DIA

6” MINIMUM

CLEARANCE FOR

THERMISTOR

REMOVAL

Fig. 14 — Dual Leaving Water Thermistor Well

PART

NUMBER

DIMENSIONS in. (mm)

A B

10HB50106801 3.10 (78.7) 1.55 (39.4)

10HB50106802 4.10 (104.1) 1.28 (32.5)

Table 22 — Dual Chiller Configuration (Slave Chiller Example)

NOTES:

1. Slave Control Method (CTRL) must be configured for 0.

2. Slave CCN Address (CCNA) must be different than Master.

3. Slave CCN Bus Number (CCNB) must be the same as Master

4. Slave does not require SLVA, LLBL, LLBD, or LLDY to be configured.

SUB-MODE ITEM KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTS

DISP

UNIT

OPT1

OPT2

CTRL CONTROL METHOD

CTRL 0 SWITCH DEFAULT 0

OPT2

CCN

CCNA

CCNA 1 CCN ADDRESS SCROLLING STOPS

1 VALUE FLASHES

2SELECT 2

(SEE NOTE 2)

CCNA 2 CCN ADDRESS CHANGE ACCEPTED

CCN

CCNB 0 CCN BUS NUMBER DEFAULT 0

(SEE NOTE 3)

CCN

RSET PROCEED TO

SUBMODE RSET

RSET CRST COOLING RESET TYPE

LLEN LEAD/LAG CHILLER ENABLE 15 ITEMS

LLEN DSBL SCROLLING STOPS

DSBL VALUE FLASHES

ENBL SELECT ENBL

LLEN ENBL LEAD/LAG CHILLER ENABLE CHANGE ACCEPTED

LLEN

MSSL MASTER /SLAVE SELECT

MSSL MAST SCROLLING STOPS

MAST VALUE FLASHES

SLVE SELECT SLVE

MSSL SLVE MASTER /SLAVE SELECT CHANGE ACCEPTED

MSSL

RSET SLAVE COMPLETE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

ENTER

ESCAPE

Table 23 — Menu Configuration of 4 to 20 mA Cooling Set Point Control

Table 24 — 4 to 20 mA Reset

NOTE: The example above shows how to configure the chiller for

4 to 20 mA reset. No reset will occur at 4.0 mA input, and a 5.0 F

reset will occur at 20.0 mA. An EMM (energy management module)

is required.

To use outdoor air or space temperature reset, four variables

must be configured. In the Configuration mode under the sub-

mode RSET, items (Configuration



RSET



CRST),

(Configuration



RSET



RM.NO), (Configuration



RSET



RM.F), and (Configuration



RSET



RT.DG)

must be properly set. See Table 25 — Configuring Outdoor Air

and Space Temperature Reset. The outdoor air reset example

provides 0° F (0° C) chilled water set point reset at 85.0 F

(29.4 C) outdoor-air temperature and 15.0 F (8.3 C) reset at

55.0 F (12.8 C) outdoor-air temperature. The space tempera-

ture reset example provides 0° F (0° C) chilled water set point

reset at 72.0 F (22.2 C) space temperature and 6.0 F (3.3 C) re-

set at 68.0 F (20.0 C) space temperature. The variable CRST

should be configured for the type of reset desired. The variable

RM.NO should be set to the temperature that no reset should

occur. The variable RM.F should be set to the temperature that

maximum reset is to occur. The variable RM.DG should be set

to the maximum amount of reset desired. Figures 15 and 16 are

examples of outdoor air and space temperature resets.

To use return reset, four variables must be configured. In the

Configuration mode under the sub-mode RSET, items CRST,

RT.NO, RT.F and RT.DG must be properly set. See Table 26

— Configuring Return Temperature Reset. This example pro-

vides 5.0 F (2.8 C) chilled water set point reset at 2.0 F (1.1 C)

cooler T and 0° F (0° C) reset at 10.0 F (5.6 C) cooler T. The

variable RT.NO should be set to the cooler temperature differ-

ence (T) where no chilled water temperature reset should oc-

cur. The variable RT.F should be set to the cooler temperature

difference where the maximum chilled water temperature reset

should occur. The variable RM.DG should be set to the maxi-

mum amount of reset desired.

To verify that reset is functioning correctly proceed to Run

Status mode, sub-mode VIEW, and subtract the active set point

(Run Status



VIEW



SETP) from the control point (Run

Status



VIEW



CTPT) to determine the degrees reset.

MODE

(RED LED)

KEYPAD

ENTRY SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

CONFIGURATION

DISP

UNIT

OPT1

OPT2

CCN

RSET

SLCT CLSP 0 COOLING SETPOINT SELECT

0 Scrolling Stops

0 Flashing ‘0’

3Select ‘3’

3 Change Accepted

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

RSET

CRST 1 COOLING RESET

TYPE

0 = no reset

1 = 4 to 20 mA input

2 = Outdoor air temp

3 = Return Fluid

4 = Space Temperature

MA.DG 5.0 F

(2.8 C)

DEGREES COOL

RESET

Default: 0° F (0° C) Reset at 20 mA

Range: –30 to 30 F (–16.7 to 16.7 C)

ENTER

IMPORTANT: Care should be taken when interfacing with

other control systems due to possible power supply differ-

ences: full wave bridge versus half wave rectification. Con-

nection of control devices with different power supplies

may result in permanent damage. ComfortLink™ controls

incorporate power supplies with half wave rectification. A

signal isolation device should be utilized if the signal gen-

erator incorporates a full wave bridge rectifier.

Table 25 — Configuring Outdoor Air and Space Temperature Reset

*1 item skipped in this example.

Table 26 — Configuring Return Temperature Reset

*1 item skipped in this example.

MODE

(RED LED)

KEYPAD

ENTRY

SUB-

MODE

KEYPAD

ENTRY ITEM

DISPLAY ITEM

EXPANSION COMMENT

Outdoor

Air Space

CONFIGURATION

DISP

UNIT

OPT1

OPT2

CCN

RSET CRST 2 4 COOLING RESET

TYPE

2 = Outdoor-Air Temperature

(Connect to LVT-4,5)

4 = Space Temperature

(Connect to LVT-3,4)

RM.NO* 85 °F 72 °F REMOTE - NO

RESET TEMP

Default: 125.0 F (51.7 C)

Range: 0° to125 F

RM.F 55 °F 68 °F REMOTE - FULL

RESET TEMP

Default: 0.0° F (-17.7 C)

Range: 0° to 125 F

RM.DG 15 °F 6 °F REMOTE - DEGREES

RESET

Default: 0° F (0° C)

Range: –30 to 30 F

(–34.4 to -1.1 °C)

MODE

(RED LED)

KEYPAD

ENTRY SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT

CONFIGURATION

DISP TEST ON/OFF TEST DISPLAY LEDs

UNIT TYPE X UNIT TYPE

OPT1 FLUD X COOLER FLUID

OPT2 CTRL X CONTROL METHOD

CCN

RSET CRST 3 COOLING RESET TYPE

0 = No Reset

1 = 4 to 20 mA Input (EMM required)

(Connect to EMM TB6-2,3)

2 = Outdoor-Air Temperature

3 = Return Fluid

4 = Space Temperature

(Connect to TB5-5,6)

RT.NO* 10.0 FRETURN FLUID - NO

RESET TEMP

Default: 10.0 F (5.6 C)

Range: 0° to10 F COOLER T

RT.F 2.0 FRETURN FLUID - FULL

RESET TEMP

Default: 0 F (–17.8 C)

Range: 0° to 30 F COOLER T

RT.DG 5.0 FRETURN - DEGREES

RESET

Default: 0 F (0 C)

Range: –30 to 30°F (–16.7 to 16.7 C)

ENTER

Under normal operation, the chiller will maintain a constant

leaving fluid temperature approximately equal to the chilled

fluid set point. As the cooler load varies, the entering cooler

fluid will change in proportion to the load as shown in Fig. 17.

Usually the chiller size and leaving-fluid temperature set point

are selected based on a full-load condition. At part load, the flu-

id temperature set point may be colder than required. If the

leaving fluid temperature was allowed to increase at part load,

the efficiency of the machine would increase.

Return temperature reset allows for the leaving temperature

set point to be reset upward as a function of the return fluid

temperature or, in effect, the building load.

Demand Limit — Demand limit is a feature that allows

the unit capacity to be limited during periods of peak energy us-

age. There are 3 types of demand limiting that can be config-

ured. The first type is through 2-stage switch control, which will

reduce the maximum capacity to 2 user-configurable percentag-

es. The second type is by 4 to 20 mA signal input which will re-

duce the maximum capacity linearly between 100% at a 4 mA

input signal (no reduction) down to the user-configurable level

at a 20 mA input signal. The third type uses the CCN Loadshed

module and has the ability to limit the current operating capaci-

ty to maximum and further reduce the capacity if required.

NOTE: The 2-stage switch control and 4 to 20-mA input sig-

nal types of demand limiting require the energy management

module (EMM).

To use demand limit, select the type of demand limiting to

use. Then configure the demand limit set points based on the

type selected.

DEMAND LIMIT (2-Stage Switch Controlled) — To con-

figure demand limit for 2-stage switch control set the Demand

Limit Select (Configuration



RSET



DMDC) to 1. Then

configure the 2 Demand Limit Switch points (Configura-

tion



RSET



DLS1) and (Configuration



RSET



DLS2)

to the desired capacity limit. See Table 27. Capacity steps are

controlled by 2 relay switch inputs field wired to LVT as shown

in Fig. 5.

For demand limit by 2-stage switch control, closing the first

stage demand limit contact will put the unit on the first demand

limit level. The unit will not exceed the percentage of capacity

entered as Demand Limit Switch 1 set point (DLS1). Closing

contacts on the second demand limit switch prevents the unit

from exceeding the capacity entered as Demand Limit Switch

2 set point. The demand limit stage that is set to the lowest de-

mand takes priority if both demand limit inputs are closed. If

the demand limit percentage does not match unit staging, the

unit will limit capacity to the closest capacity stage.

To disable demand limit configure DMDC to 0. See

Table 27.

EXTERNALLY POWERED DEMAND LIMIT (4 to

20 mA Controlled) — To configure demand limit for 4 to 20

mA control set the Demand Limit Select (Configura-

tion



RSET



DMDC) to 2. Then configure the Demand

Limit at 20 mA (Configuration



RSET



DM20) to the

maximum loadshed value desired. Connect the output from an

externally powered 4 to 20 mA signal to terminal block LVT,

terminals 7 and 8 (+,–). Refer to the unit wiring diagram for

these connections to the optional/accessory energy manage-

ment module and terminal block. The control will reduce al-

lowable capacity to this level for the 20 mA signal. See Table

27 and Fig. 18.

LEGEND

LWT — Leaving Water (Fluid) Temperature

Fig. 15 — Outdoor-Air Temperature Reset

LEGEND

LWT — Leaving Water (Fluid) Temperature

Fig. 16 — Space Temperature Reset

CAUTION

Care should be taken when interfacing with other manufac-

turer’s control systems, due to possible power supply

differences, full wave bridge versus half wave rectification.

The two different power supplies cannot be mixed.

ComfortLink™ controls use half wave rectification. A sig-

nal isolation device should be utilized if a full wave bridge

signal generating device is used.

LWT

LEGEND

Fig. 17 — Standard Chilled Fluid

Temperature Control — No Reset

EWT — Entering Water (Fluid) Temperature

LWT — Leaving Water (Fluid) Temperature

DEMAND LIMIT (CCN Loadshed Controlled) — To con-

figure Demand Limit for CCN Loadshed control set the De-

mand Limit Select (Configuration



RSET



DMDC) to 3.

Then configure the Loadshed Group Number (Configura-

tion



RSET



SHNM), Loadshed Demand Delta (Configu-

ration



RSET



SHDL), and Maximum Loadshed Time

(Configuration



RSET



SHTM). See Table 27.

The Loadshed Group number is established by the CCN

system designer. The ComfortLink™ controls will respond to a

Redline command from the Loadshed control. When the

Redline command is received, the current stage of capacity is

set to the maximum stages available. Should the loadshed con-

trol send a Loadshed command, the ComfortLink controls will

reduce the current stages by the value entered for Loadshed

Demand delta. The Maximum Loadshed Time is the maximum

length of time that a loadshed condition is allowed to exist. The

control will disable the Redline/Loadshed command if no

Cancel command has been received within the configured

maximum loadshed time limit.

Cooling Set Point (4 to 20 mA) — A field supplied

and generated, externally powered 4 to 20 mA signal can be

used to provide the leaving fluid temperature set point. Connect

the signal to LVT-10,8 (+,–). See Table 27 for instructions to

enable the function. Figure 19 shows how the 4 to 20 mA sig-

nal is linearly calculated on an overall 10 F to 80 F range for

fluid types (Configuration



OPT1



FLUD) 1 or 2. The set

point will be limited by the fluid (FLUD) type. Be sure that the

chilled water loop is protected at the lowest temperature.

50% CAPACITY AT 20 mA

75% CAPACITY AT 12 mA

100% CAPACITY AT 4 mA

0 2 4 6810 12 14 16 18 20

DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT

100

MAX. ALLOWABLE LOAD (%)

Fig. 18 — 4 to 20-mA Demand Limiting

100

(38)

(27)

(15)

(4.4)

(-7)

(-17)

4 6.3 8.6 10.9 13.1 15.4 17.7 20

4 TO 20 mA SIGNAL TO EMM

SET POINT, F (C)

(32)

(21)

(10)

(-1)

(-12)

(FLUD = 2) MINIMUM

SET POINT 14 F (-10 C)

(FLUD = 1) MINIMUM

SET POINT 38 F (3.3 C)

MAXIMUM

SET POINT

70 F (21.1 C)

Fig. 19 — Cooling Set Point (4 to 20 mA)

EMM — Energy Management Module

Table 27 — Configuring Demand Limit

*Seven items skipped in this example.

PRE-START-UP

Do not attempt to start the chiller until following checks

have been completed.

System Check

1. Check all auxiliary components, such as chilled fluid

pumps, air-handling equipment, condenser pump or other

equipment to which the chiller supplies liquid. Consult

manufacturer's instructions. Verify that any pump inter-

lock contacts have been properly installed. If the unit has

field-installed accessories, be sure all are properly in-

stalled and wired correctly. Refer to unit wiring diagrams.

2. Use the scrolling marquee display to adjust the Cooling

Set Point.

3. Fill chilled fluid circuit with clean water (with recom-

mended inhibitor added) or other non-corrosive fluid to

be cooled. Bleed all air out of the high points of the sys-

tem. If chilled water is to be maintained at a temperature

below 40 F (4.4 C), a brine of sufficient concentration

must be used to prevent freeze-up at anticipated suction

temperatures. To ensure sufficient loop volume, see

Table 28.

4. Check tightness of all electrical connections.

5. Oil should be visible in the compressor sightglass(es).

See Fig. 20. An acceptable oil level in the compressors is

from 1/8 to 3/8 of sight glass when the compressors are off.

Adjust the oil level as required. See Oil Charge section on

page 37 for Carrier approved oils.

6. Crankcase heaters must be firmly attached to compres-

sors, and must be on for 24 hours prior to start-up

(30MPA units only).

7. Electrical power source must agree with unit nameplate.

8. Check rotation of scroll compressors. Monitor control

alarms during first compressor start up for reverse rota-

tion protection alarm.

Table 28 — Minimum Flow Rates and Minimum

Loop Volume (for Comfort Cooling)

LEGEND

NOTES:

Gallons = V x AHRI capacity in tons.

Liters = N x AHRI capacity in kW.

MODE KEYPAD

ENTRY SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM EXPANSION COMMENT

CONFIGURATION DISP TEST ON/OFF Test Display LEDs

UNIT TYPE X Unit Type

OPT1 FLUD X Cooler Fluid

OPT2 CTRL X Control Method

CCN CCNA X CCN Address

RSET CRST X Cooling Reset Type

DMDC* X Demand Limit Select

Default: 0

0 = None

1 = Switch

2 = 4 to 20 mA Input

3 = CCN Loadshed

DM20 XXX % Demand Limit at 20 mA Default: 100%

Range: 0 to 100

SHNM XXX Loadshed Group

Number

Default: 0

Range: 0 to 99

SHDL XXX% Loadshed Demand

Delta

Default: 0%

Range: 0 to 60%

SHTM XXX MIN Maximum Loadshed

Time

Default: 60 min.

Range: 0 to 120 min.

DLS1 XXX % Demand Limit

Switch 1

Default: 80%

Range: 0 to 100%

DLS2 XXX % Demand Limit

Switch 2

Default: 50%

Range: 0 to 100%

ENTER

IMPORTANT: Before beginning Pre-Start-Up or Start-Up,

complete Start-Up Checklist for 30MP Liquid Chiller at

end of this publication (page CL-1 to CL-8). The checklist

assures proper start-up of a unit, and provides a record of

unit condition, application requirements, system informa-

tion, and operation at initial start-up.

UNIT SIZE EVAPORATOR CONDENSER* MINIMUM EVAPORATOR

LOOP VOLUME

Gal./Min L/s Gal./Min L/s Gal. L

30MP015 22 1.4 22 1.4 46.2 174.9

30MP020 28 1.8 28 1.8 60.9 230.5

30MP030 43 2.7 43 2.7 92.4 349.7

30MP040 55 3.5 55 3.5 78.4 296.7

30MP045 64 4.0 64 4.0 91.6 346.7

AHRI — Air Conditioning, Heating, and Refrigeration Institute

N—Liters per kW

V—Gallons per ton

APPLICATION V N

Normal Air Conditioning 33.25

Process Type Cooling 6 to 10 6.5 to 10.8

Low Ambient Operation 6 to 10 6.5 to 10.8

START-UP AND OPERATION

Compressor crankcase heaters must be on for 24 hours be-

fore start-up. To energize the crankcase heaters, close the field

disconnect. Leave the compressor circuit breakers off/open.

The crankcase heaters are now energized.

NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-8.

Actual Start-Up — Actual start-up should be done only

under supervision of a qualified refrigeration mechanic.

1. Be sure all service valves are open (30MPA units only).

2. Using the scrolling marquee display, set leaving-fluid set

point (Set Points



COOL



CSP.1). No cooling range

adjustment is necessary.

3. Start chilled fluid pump (if not configured for cooler

pump control).

4. Turn ENABLE/OFF/REMOTE CONTACT switch to

ENABLE position.

5. Allow unit to operate and confirm that everything is func-

tioning properly. Check to see that leaving fluid tempera-

ture agrees with leaving set point (Set Points



COOL



CSP.1) or (Set Points



COOL



CSP.2), or if reset is

used, with the control point (Run Status



VIEW



CTPT).

6. Check the cooler leaving chilled water temperature to see

that it remains well above 32 F (0° C), or the brine freez-

ing point if the unit is a medium temperature brine unit.

7. Recheck compressor oil level (see Oil Charge section).

Check Refrigerant Charge — All 30MPW units are

shipped with a complete operating charge of R-410A and

should be under sufficient pressure to conduct a leak test after

installation. If there is no system pressure, admit nitrogen until

a pressure is observed and then proceed to test for leaks. After

leaks are repaired, the system must be dehydrated.

All refrigerant charging should be done through the ¼-in.

Schraeder connection on the liquid line. Do NOT add refriger-

ant charge through the low-pressure side of the system. If com-

plete charging is required, weigh in the appropriate charge for

the circuit as shown on the unit nameplate. If partial charging is

required, operate circuit at full load and add charge until the

sight glass is clear of bubbles.

The 30MPA units (condenserless) are shipped with a nitro-

gen holding charge only. After chiller assembly is completed in

the field, system must be fully charged. While the unit is run-

ning at full capacity, add refrigerant until the sight glass is clear.

R-410A is the normal refrigerant.

Do not open the liquid valve until there is a charge in re-

mainder of system. A positive pressure indicates a charge in

system. With the unit operating at full load, check liquid line

sight glass to be sure the unit is fully charged (bubbles in the

sight glass indicate the unit is not fully charged).

If there is no refrigerant vapor pressure in the system, the

entire system must be leak tested. After repairing leaks, evacu-

ate the system before recharging.

Follow approved evacuation procedures when removing

refrigeration. Release remaining pressure to an approved evac-

uated cylinder.

The liquid charging method is recommended for complete

charging or when additional charge is required.

EVACUATION AND DEHYDRATION — Because the

30MP systems use polyolester (POE) oil, which can absorb

moisture, it is important to minimize the amount of time that

the system interior is left exposed to the atmosphere. Minimiz-

ing the exposure time of the oil to the atmosphere will mini-

mize the amount of moisture that needs to be removed during

evacuation.

Once all of the piping connections are complete, leak test

the unit and then pull a deep dehydration vacuum. Connect the

vacuum pump to the high flow Schraeder valve in the suction

line and liquid line. For best results, it is recommended that a

vacuum of at least 500 microns (0.5 mm Hg) be obtained. Af-

terwards, to ensure that no moisture is present in the system,

perform a standing vacuum-rise test.

With the unit in deep vacuum (500 microns or less), isolate

the vacuum pump from the system. Observe the rate-of-rise of

the vacuum in the system. If the vacuum rises by more than

50 microns in a 30-minute time period, then continue the dehy-

dration process. Maintain a vacuum on the system until the

standing vacuum requirement is met. This will ensure a dry

system.

By following these evacuation and dehydration procedures,

the amount of moisture present in the system will be mini-

mized. It is required that liquid line filter driers be installed

between the condenser(s) and the expansion devices to capture

any foreign debris and provide additional moisture removal

capacity.

CAUTION

Crankcase heaters on 30MPA units are wired into the con-

trol circuit, so they are always operable as long as the main

power supply disconnect is on (closed), even if any safety

device is open. Compressor heaters must be on for 24

hours prior to the start-up of any compressor. Equipment

damage could result if heaters are not energized for at least

24 hours prior to compressor start-up.

OIL SIGHTGLASS

Fig. 20 — Sight Glass Location

a30-4978

CAUTION

Never charge liquid into low-pressure side of system. Do

not overcharge. Overcharging results in higher discharge

pressure, possible compressor damage, and higher power

consumption. During charging or removal of refrigerant, be

sure water is continuously circulating through the cooler to

prevent freezing.

CAUTION

Be careful not to overcharge the system. Overcharging

results in higher discharge pressure, possible compressor

damage, and higher power consumption.

LIQUID CHARGING METHOD — Add charge to the unit

through the liquid line service valve. Never charge liquid into

the low-pressure side of the system.

1. Close liquid line ball valve (30MPA only).

2. Connect a refrigerant cylinder loosely to the high flow

Schraeder valve connection on the liquid line. Purge the

charging hose and tighten the connections.

3. Open the refrigerant cylinder valve.

4. If the system has been dehydrated and is under vacuum,

break the vacuum with refrigerant gas. For R-410A, build

up system pressure to 101 psig and 32 F (697 kPa and

0° C). Invert the refrigerant cylinder so that the liquid re-

frigerant will be charged.

5. a. For complete charge of 30MPW units, follow

charging by weight procedure. When charge is

nearly full, complete the process by observing the

sight glass for clear liquid flow while the unit is

operating. The use of sight glass charging is valid

only when unit is operating at full capacity.

b. For complete charge of 30MPA units or where

refrigerant cylinder cannot be weighed, follow the

condenser manufacturer’s charging procedure or

follow charging by sight glass procedure. The use

of sight glass charging is valid only when unit is

operating at full capacity.

6. a. The 30MPA condenserless units are shipped

with a nitrogen holding charge. After installation

with the field-supplied system high side, the com-

plete system should be evacuated and charged per

the condenser manufacturer’s charging procedure

or charged until the sight glass is clear (with the

unit running at full capacity). To achieve maxi-

mum system capacity, add additional charge equal

to the difference between the condenser optimal

charge and the condenser minimum charge, which

can be obtained from the charge data provided in

the condenser installation instructions.

b. To ensure maximum performance of 30MPW

units, raise the compressor saturated discharge

temperature (SDT) to approximately 100 F

(37.8 C) by throttling the condenser water intake.

Add charge until there is approximately 9 to 12° F

(5.0 to 6.6° C) of system subcooling (SDT minus

actual temperature entering the thermostatic

expansion valve).

Operating Limitations

TEMPERATURES (See Table 29 for 30MP standard tem-

perature limits).

High Cooler Leaving Chilled Water (Fluid) Temperatures

(LCWT) — During start-up with cooler the LCWT should not

be above approximately 60 F (16 C).

Low Cooler LCWT — For standard units with fresh water,

the LCWT must be no lower than 40 F (4.4 C). For standard

units with a proper brine solution, the LCWT must be no lower

than 32 F (0° C). If the unit is the factory-installed optional

medium temperature brine unit, the cooler LCWT can go

down to 15 F (–9.4 C).

Table 29 — Temperature Limits for

Standard 30MP Units

LEGEND

*For sustained operation, EWT should not exceed 85 F (29.4 C).

†Unit requires modification below this temperature.

VOLTAGE — ALL UNITS

Main Power Supply — Minimum and maximum acceptable

supply voltages are listed in the Installation Instructions.

Unbalanced 3-Phase Supply Voltage — Never operate a motor

where a phase imbalance between phases is greater than 2%.

To determine percent voltage imbalance:

The maximum voltage deviation is the largest difference

between a voltage measurement across 2 legs and the average

across all 3 legs.

Example: Supply voltage is 240-3-60.

AB = 243 v

BC = 236 v

AC = 238 v

1. Determine average voltage:

2. Determine maximum deviation from average voltage:

(AB) 243 – 239 = 4 v

(BC) 239 – 236 = 3 v

(AC) 239 – 238 = 1 v

Maximum deviation is 4 v.

3. Determine percent voltage imbalance:

CAUTION

Do not operate with cooler leaving chiller water (fluid)

temperature (LCWT) below 32 F (0° C) for standard units

with proper brine solution or 40 F (4.4 C) for the standard

units with fresh water, or below 15 F (–9.4 C) for units fac-

tory built for medium temperature brine.

TEMPERATURE LIMIT F C

Maximum Condenser LWT 140 60

Minimum Condenser EWT 70 21

Maximum Cooler EWT* 95 35

Maximum Cooler LWT 70 21

Minimum Cooler LWT† 40 4

EWT — Entering Fluid (Water) Temperature

LWT — Leaving Fluid (Water) Temperature

CAUTION

Medium temperature brine duty application (below 32 F

[0° C] LCWT) for chiller normally requires factory modifi-

cation. Contact your Carrier representative for applicable

LCWT range for standard water-cooled chiller in a specific

application.

% Voltage Imbalance = 100 x

max voltage deviation

from avg voltage

average voltage

Average voltage = 243 + 236 + 238

=717

= 239

% Voltage Imbalance = 100 x 4

239

= 1.7%

a30-4979

This voltage imbalance is satisfactory as it is below the

maximum allowable of 2%.

Control Circuit Power — Power for the control circuit is

supplied from the main incoming power through a factory-

installed control power transformer (TRAN1) for all models.

Field wiring connections are made to the LVT.

OPERATION SEQUENCE

The unit is started by putting the ENABLE/OFF/REMOTE

CONTACT switch in the ENABLE or REMOTE CONTACT

position. When the unit receives a call for cooling (either from

the internal control or CCN network command or remote con-

tact closure), the unit stages up in capacity to maintain the leav-

ing fluid set point. The first compressor starts 11/2 to 3 minutes

after the call for cooling.

For all units, if temperature reset is being used, the unit con-

trols to a higher leaving-fluid temperature as the building load

reduces. If demand limit is used, the unit may temporarily be

unable to maintain the desired leaving-fluid temperature be-

cause of imposed power limitations.

SERVICE

Electronic Components

CONTROL COMPONENTS — Unit uses an advanced elec-

tronic control system that normally does not require service.

For details on controls refer to Operating Data section.

Access to the controls is through a hinged panel. Inner pan-

els are secured in place and should not be removed unless all

power to the chiller is off.

Compressor Replacement — All models contain

scroll compressors and have two or three compressors. A com-

pressor is most easily removed from the side of the unit or

above, depending on where clearance space was allowed dur-

ing unit installation. See Fig. 21.

Remove the junction box cover bolts and disconnect the

compressor power and crankcase heater connections (30MPA

only). Remove the cable from the compressor junction box.

Remove the connections from the high-pressure switch. Re-

move the crankcase heater. Knock the same holes out of the

new compressor junction box and install the cable connectors

from the old compressor.

The compressors are bolted to rails, which are in turn bolted

to the unit basepan for all sizes. Remove the 4 bolts holding the

compressor to the rail on the basepan. Save the mounting hard-

ware for use with the new compressor. Carefully cut the com-

pressor suction and discharge lines with a tubing cutter as close

to the compressor as feasible. Remove high-pressure switch

and pressure transducer(s) if required for compressor removal.

Lift one corner of the compressor at a time and remove all the

steel spacers. Remove the old compressor from the unit.

Slide the new compressor in place on the rails. Lifting one

side of the compressor at a time, replace all of the compressor

mounting hardware. Using new tubing as required, reconnect

compressor suction and discharge lines. Using hardware saved,

reinstall the mounting bolts and washers through the compres-

sor feet. Using proper techniques, braze suction and discharge

lines and check for leaks. Reconnect oil equalization line.

Re-install the crankcase heater (30MPA units). Reconnect

the compressor power connections and high-pressure switch

wiring as on the old compressor. Refer to Fig. 21. Following

the installation of the new compressor, tighten all hardware to

the following specifications. (See Table 30.)

Table 30 — Unit Torque Specification

30MPW Condenser and 30MP Cooler

BRAZED-PLATE COOLER AND CONDENSER HEAT

EXCHANGER REPLACEMENT — Brazed-plate heat ex-

changers cannot be repaired if they develop a leak. If a leak

(refrigerant or water) develops, the heat exchanger must be

replaced. To replace a brazed plate heat exchanger:

1. Disconnect the liquid-in and liquid-out connections at the

heat exchanger.

2. Check that the replacement heat exchanger is the same as

the original heat exchanger. For the condensers, compare

part numbers on the heat exchangers. For the coolers, in-

sulation covers the manufacturer’s part number. Make

sure the depths of the replacement and original cooler

heat exchangers are the same.

3. Recover the refrigerant from the system, and unsolder the

refrigerant-in and refrigerant-out connections.

4. Remove the four nuts holding the heat exchanger to the

brackets. Save the nuts.

5. Install the replacement heat exchanger in the unit and at-

tach to the bracket using the four nuts removed in Step 4.

For sizes 015 and 020, torque is 7-10 ft-lb. For sizes 030-

045, torque is 35 to 50 ft-lb.

6. Carefully braze the refrigerant lines to the connections on

the heat exchanger. Lines should be soldered using silver

as the soldering material with a minimum of 45% silver.

Keep the temperature below 1472 F (800 C) under nor-

mal soldering conditions (no vacuum) to prevent the cop-

per solder of the brazed plate heat exchanger from chang-

ing its structure. Failure to do so can result in internal

or external leakage at the connections which cannot be

repaired.

7. For coolers, ensure that the original size tubing is used

(1/2-in. for sizes 015 and 020 and 5/8-in. for sizes 030-045)

between the TXV and the cooler. The TXV must be lo-

cated within 1 ft of the heat exchanger, with no bends be-

tween the TXV outlet and the cooler inlet.

8. Reconnect the water/brine lines.

9. Dehydrate and recharge the unit. Check for leaks.

BRAZED-PLATE COOLER AND CONDENSER HEAT

EXCHANGER CLEANING — Brazed-plate heat exchang-

ers must be cleaned chemically. A professional cleaning ser-

vice skilled in chemical cleaning should be used. Use a weak

acid (5% phosphoric acid, or if the heat exchanger is cleaned

frequently, 5% oxalic acid). Pump the cleaning solution

through the exchanger, preferably in a backflush mode. After

cleaning, rinse with large amounts of fresh water to dispose of

all the acid. Cleaning materials must be disposed of properly.

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately. Do not operate unit until imbalance condition

is corrected.

WARNING

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during service. There may

be more than one disconnect switch. Tag all disconnect

locations to alert others not to restore power until work is

completed.

FASTENER RECOMMENDED TORQUE

Compressor Mounting

Bolts

7 to 10 ft-lb (9.5 to 13.5 N-m)

Compressor Power

Connections

24 to 28 in.-lb (2.7- to 3.2 N-m)

Compressor Ground

Terminal Connections

14 to 18 in.-lb (1.6 to 2.0 N-m)

The strainers in front of the water/brine inlets of the heat

exchangers should be cleaned periodically, depending on con-

dition of the chiller water/brine.

Oil Charge

Puron refrigerant systems use a polyol ester (POE) oil. Use

only Carrier approved compressor oil. Oil should be visible in

compressor oil sight glass. An acceptable oil level is from 1/8 to

3/8 of sight glass. All compressors must be off when checking

oil level. Recommended oil level adjustment method is as

follows:

ADD OIL — Recover charge from the unit. Add oil to suction

line Schrader valve on tandem compressors sets and the com-

pressor Schrader on the trios. (See Fig. 21.) When oil can be

seen at the bottom of the sight glass, add oil in 5 oz increments

which is approximately 1/8 in oil level. Run all compressors for

20 minutes then shut off to check oil level. Repeat procedure

until acceptable oil level is present.

NOTE: Use only Carrier approved compressor oil. Approved

sources are:

Totaline . . . . . . . . . . . . . . . . . . . . . . 3MAF POE, P903-1601

Mobil . . . . . . . . . . . . . . . . . . . . . . . . . . . EAL Arctic 32-3MA

Uniqema . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RL32-3MAF

Do not reuse oil that has been drained out, or oil that has

been exposed to atmosphere.

Check Refrigerant Feed Components

FILTER DRIER — The function of the filter drier is to main-

tain a clean, dry system. The moisture indicator (described

below) indicates any need to change the filter drier. The filter

drier is a sealed-type drier. When the drier needs to be

changed, the entire filter drier must be replaced.

MOISTURE-LIQUID INDICATOR — The indicator is located

immediately ahead of the TXV to provide an indication of the

refrigerant moisture content. It also provides a sight glass for

refrigerant liquid. Clear flow of liquid refrigerant (at full unit

loading) indicates sufficient charge in the system. Bubbles in the

sight glass (at full unit loading) indicate an undercharged system

or the presence of noncondensables. Moisture in the system,

measured in parts per million (ppm), changes the color of the

indicator as follows:

Green (safe) —Moisture is below 75 ppm

Yellow-Green (caution) — 75 to 150 ppm

Yellow (wet) — above 150 ppm

The unit must be in operation at least 12 hours before the

moisture indicator gives an accurate reading, and must be in

contact with liquid refrigerant. At the first sign of moisture in

the system, change the corresponding filter drier.

THERMOSTATIC EXPANSION VALVE (TXV) — The

TXV controls the flow of liquid refrigerant to the cooler by

maintaining constant superheat of vapor leaving the cooler.

The valve(s) is activated by a temperature-sensing bulb(s)

strapped to the suction line(s).

The valve(s) is factory-set to maintain between 8° and 10° F

(4.4° and 5.6° C) of superheat leaving the cooler. Check the

superheat during operation after conditions have stabilized. If

necessary, adjust the superheat to prevent refrigerant floodback

to the compressor.

CAUTION

The compressor in a Puron® refigerant (R-410A) system

uses a polyol ester (POE) oil. This is extremely hygro-

scopic, meaning it absorbs water readily. POE oils can

absorb 15 times as much water as other oils designed for

HCFC and CFC refrigerants. Take all necessary precau-

tions to avoid exposure of the oil to the atmosphere. Failure

to do so could result in possible equipment damage.

HPS

DPT

RGT

SPT

EWT

(HIDDEN)

CWFS

LWT

Fig. 21 — Compressor Location — 30MP015-045 Units (30MPW045 Unit Shown)

LEGEND

CWFS — Chilled Water Flow Switch

DPT — Discharge Pressure Transducer

EWT — Entering Water Thermistor

HPS — High Pressure Switch

LWT — Leaving Water Thermistor

RGT — Return Gas Thermistor (Optional)

SPT — Suction Pressure Transducer

a30-5049

MINIMUM LOAD VALVE — On units equipped with the

factory-installed hot gas bypass option, a solenoid valve and

discharge bypass valve (minimum load valve) are located

between the discharge line and the cooler entering-refrigerant

line. The MBB cycles the solenoid to perform minimum load

valve function and the discharge bypass valve modulates to the

suction pressure set point of the valve. The bypass valve has an

adjustable opening setting between 95 to 115 psig (655 to

793 kPa). The factory setting is 105 psig (724 kPa).

The amount of capacity reduction achieved by the mini-

mum load valve is not adjustable. The total unit capacity with

the minimum load valve is shown in Table 19.

PRESSURE RELIEF DEVICES — All units have one pres-

sure relief device per circuit located in the liquid line which re-

lieves at 210 F (100 C).

The 30MPW unit does not have a condenser pressure relief

valve, because the brazed-plate condenser is not considered a

pressure vessel, as defined in ANSI/ASHRAE 15 (American

National Standards Institute/American Society of Heating,

Refrigerating, and Air Conditioning Engineers) safety code

requirements.

For 30MPA condenserless units, pressure relief devices de-

signed to relieve at the pressure determined in local codes,

must be field-supplied and installed in the discharge line piping

in accordance with ANSI/ASHRAE 15 safety code require-

ments. Additional pressure relief valves, properly selected,

must be field-supplied and installed to protect high side equip-

ment and may be required by applicable codes.

Most codes require that a relief valve be vented directly to

the outdoors. The vent line must not be smaller than the relief

valve outlet. Consult ANSI/ASHRAE 15 for detailed informa-

tion concerning layout and sizing of relief vent lines.

Check Unit Safeties

HIGH-PRESSURE SWITCH — A high-pressure switch is

provided to protect each compressor and refrigeration system

from unsafe high pressure conditions. See Table 31 for high-

pressure switch settings.

The high-pressure switch is mounted in the discharge line of

each circuit. If an unsafe, high-pressure condition should exist,

the switch opens and shuts off the affected circuit. The CSB

(current sensing board) senses the compressor feedback signal

and generates an appropriate alarm. The MBB prevents the cir-

cuit from restarting until the alert condition is reset. The switch

should open at the pressure corresponding to the appropriate

switch setting as shown in Table 31.

Table 31 — Factory Settings, High-Pressure

Switch (Fixed)

Clear the alarm using the scrolling marquee display. The

unit should restart after the compressor anti-short-cycle delay,

built into the unit control module, expires.

PRESSURE TRANSDUCERS — Each unit is equipped with

a suction and discharge pressure transducer. These inputs to the

MBB are not only used to monitor the status of the unit, but to

also maintain operation of the chiller within the compressor

manufacturer's specified limits. The input to the MBB from the

suction pressure transducer is also used to protect the compres-

sor from operating at low pressure conditions. If suction return

gas thermistors are installed, then additional low superheat

conditions are detected. In some cases, the unit may not be able

to run at full capacity. The control module will automatically

reduce the capacity of a circuit as needed to maintain specified

maximum/minimum operating pressures.

COOLER FREEZE-UP PROTECTION

The main base board (MBB) monitors cooler leaving fluid

temperature at all times. The MBB will rapidly remove stages

of capacity as necessary to prevent freezing conditions due to

the rapid loss of load or low cooler fluid flow.

When the cooler is exposed to lower temperatures (40 F

[4.4 C] or below), freeze-up protection is required using inhib-

ited ethylene or propylene glycol.

Thermistors — Electronic control uses up to five 5 k

thermistors to sense temperatures used to control operation of

the chiller. Thermistors EWT, LWT, RGTA, CNDE, CNDL,

and OAT are identical in their temperature and voltage drop

performance. The SPT space temperature thermistor has a

10 k input channel and it has a different set of temperature vs.

resistance and voltage drop performance. Resistance at various

temperatures are listed in Tables 32-35. For dual chiller opera-

tion, a dual chiller sensor is required which is a 5 k

thermistor.

REPLACING THERMISTORS (EWT, LWT, RGT, CNDE,

CNDL) — Add a small amount of thermal conductive grease

to the thermistor well and end of probe. For all probes, tighten

the retaining nut ¼ turn past finger tight. See Fig. 22.

THERMISTOR/TEMPERATURE SENSOR CHECK — A

high quality digital volt-ohmmeter is required to perform this

check.

1. Connect the digital voltmeter across the appropriate the-

mistor terminals at the J8 terminal strip on the main base

board (see Fig. 23).

2. Using the voltage reading obtained, read the sensor tem-

perature from Tables 32-35.

3. To check thermistor accuracy, measure temperature at

probe location with an accurate thermocouple-type tem-

perature 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 thermo-

couple and taking readings.

If a 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, by deter-

mining the resistance with chiller 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.

Pressure Transducers — The suction and discharge

transducers are different part numbers and can be distinguished

by the color of the transducer body, suction (yellow) and dis-

charge (red). No pressure transducer calibration is required.

The transducers operate on a 5 vdc supply, which is generated

by the main base board (MBB). See Fig. 23 for transducer con-

nections to the J8 connector on the MBB.

TROUBLESHOOTING — If a transducer is suspected of be-

ing faulty, first check supply voltage to the transducer. Supply

voltage should be 5 vdc ± 0.2 v. If supply voltage is correct,

compare pressure reading displayed on the scrolling marquee

display module against pressure shown on a calibrated pressure

UNIT CUTOUT CUT-IN

Psig kPa Psig kPa

30MP015-045 650 4482 500 3447

WARNING

On medium temperature brine units, the anti-freeze solu-

tion must be properly mixed to prevent freezing at a tem-

perature of at least 15 F (8.3 C) below the leaving-fluid

temperature set point. Failure to provide the proper anti-

freeze solution mixture is considered abuse and may impair

or otherwise negatively impact the Carrier warranty.

gauge. Pressure readings should be within ± 15 psig. If the

two readings are not reasonably close, replace the pressure

transducer.

Chilled Water Flow Switch — A factory-installed

flow switch is installed in the leaving fluid piping for all units.

This is a thermal-dispersion flow switch with no field adjust-

ments. The switch is set for approximately 0.5 ft/sec of flow.

The sensor tip houses two thermistors and a heater element.

One thermistor is located in the sensor tip, closest to the flow-

ing fluid. See Fig. 24. This thermistor is used to detect changes

in the flow velocity of the liquid. The second thermistor is

bonded to the cylindrical wall and is affected only by changes

in the temperature of the liquid. The thermistors are positioned

to be in close contact with the wall of the sensor probe and, at

the same time, to be kept separated from each other within the

confines of the probe.

In order to sense flow, it is necessary to heat one of the

thermistors in the probe. When power is applied, the tip of the

probe is heated. As the fluid starts to flow, heat will be carried

away from the sensor tip. Cooling of the first thermistor is a

function of how fast heat is conducted away by the flowing

liquid.

The difference in temperature between the two thermistors

provides a measurement of fluid velocity past the sensor probe.

When fluid velocity is high, more heat will be carried away

from the heated thermistor and the temperature differential will

be small. As fluid velocity decreases, less heat will be taken

from the heated thermistor and there will be an increase in tem-

perature differential.

When unit flow rate is above the minimum flow rate, then

the output is switched on, sending 24 vac to the MBB to prove

flow has been established.

For recommended maintenance, check the sensor tip for

build-up every 6 months. Clean the tip with a soft cloth. If

necessary, build-up (e.g., lime) can be removed with a common

vinegar cleansing agent.

The flow sensor cable is provided with (3) LEDs that indi-

cate if 24 vac power is present and also status of the switch

contacts. The LEDs are as follows:

• Green LED ON – 24 vac present

• One Yellow LED ON – Flow sensor switch OPEN

• Two Yellow LED ON – Flow sensor switch CLOSED

If nuisance trips of the sensor are occurring, follow the

steps below to correct the situation:

1. Check to confirm that the field-installed strainer is clean.

Use the blow-down valve provided or remove the screen

and clean it. For the case of VFD controlled pumps, en-

sure that the minimum speed setting has not been

changed.

2. Measure the pressure drop across the cooler and compare

this to the system requirements.

3. Verify that cable connections at the switch and at the ter-

minal block are secure.

4. Wrong pump motor rotation. Pump must rotate clockwise

when viewed from motor end of pump.

BASE

BOARD

SPTA

DPTA

RED

GRN

RED

BLK

GRN

RED

BLK

BLU

VIO

LVT

T-55

ACCSY

SEN

OAT ACCESSORY OR

DUAL CHILLER LWT

CONDENSER EWT

ACCESSORY

CONDENSER LWT

ACCESSORY

BLK

RED COOLER ENTERING

FLUID TEMP

BLK

RED COOLER LEAVING

FLUID TEMP

RGTA

ACCESSORY

J12 T55

Fig. 23 — Thermistor Connections to

Main Base Board, J8 Connector

LEGEND

ACCSY — Accessory

DPT — Discharge Pressure Transducer

EWT — Entering Water Temperature

LWT — Leaving Water Temperature Sensor

LVT — Low Voltage Terminal

OAT — Outdoor Air Temperature Sensor

RGT — Return Gas Temperature Sensor

SEN — Sensor Terminal Block

SPT — Space Temperature Sensor

a30-5043

Fig. 24— Chilled Water Flow Switch

a30-499

NOTE: Dimensions are in millimeters.

5/8 in. HEX

6" MINIMUM

CLEARANCE FOR

THERMISTOR

REMOVAL

1/4-18 NPT

Fig. 22 — Thermistor Well

Table 32 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop

(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

–25 3.699 98,010

–24 3.689 94,707

–23 3.679 91,522

–22 3.668 88,449

–21 3.658 85,486

–20 3.647 82,627

–19 3.636 79,871

–18 3.624 77,212

–17 3.613 74,648

–16 3.601 72,175

–15 3.588 69,790

–14 3.576 67,490

–13 3.563 65,272

–12 3.550 63,133

–11 3.536 61,070

–10 3.523 59,081

–9 3.509 57,162

–8 3.494 55,311

–7 3.480 53,526

–6 3.465 51,804

–5 3.450 50,143

–4 3.434 48,541

–3 3.418 46,996

–2 3.402 45,505

–1 3.386 44,066

03.369 42,679

13.352 41,339

23.335 40,047

33.317 38,800

43.299 37,596

53.281 36,435

63.262 35,313

73.243 34,231

83.224 33,185

93.205 32,176

10 3.185 31,202

11 3.165 30,260

12 3.145 29,351

13 3.124 28,473

14 3.103 27,624

15 3.082 26,804

16 3.060 26,011

17 3.038 25,245

18 3.016 24,505

19 2.994 23,789

20 2.972 23,096

21 2.949 22,427

22 2.926 21,779

23 2.903 21,153

24 2.879 20,547

25 2.856 19,960

26 2.832 19,393

27 2.808 18,843

28 2.784 18,311

29 2.759 17,796

30 2.735 17,297

31 2.710 16,814

32 2.685 16,346

33 2.660 15,892

34 2.634 15,453

35 2.609 15,027

36 2.583 14,614

37 2.558 14,214

38 2.532 13,826

39 2.506 13,449

40 2.480 13,084

41 2.454 12,730

42 2.428 12,387

43 2.402 12,053

44 2.376 11,730

45 2.349 11,416

46 2.323 11,112

47 2.296 10,816

48 2.270 10,529

49 2.244 10,250

50 2.217 9,979

51 2.191 9,717

52 2.165 9,461

53 2.138 9,213

54 2.112 8,973

55 2.086 8,739

56 2.060 8,511

57 2.034 8,291

58 2.008 8,076

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

59 1.982 7,686

60 1.956 7,665

61 1.930 7,468

62 1.905 7,277

63 1.879 7,091

64 1.854 6,911

65 1.829 6,735

66 1.804 6,564

67 1.779 6,399

68 1.754 6,238

69 1.729 6,081

70 1.705 5,929

71 1.681 5,781

72 1.656 5,637

73 1.632 5,497

74 1.609 5,361

75 1.585 5,229

76 1.562 5,101

77 1.538 4,976

78 1.516 4,855

79 1.493 4,737

80 1.470 4,622

81 1.448 4,511

82 1.426 4,403

83 1.404 4,298

84 1.382 4,196

85 1.361 4,096

86 1.340 4,000

87 1.319 3,906

88 1.298 3,814

89 1.278 3,726

90 1.257 3,640

91 1.237 3,556

92 1.217 3,474

93 1.198 3,395

94 1.179 3,318

95 1.160 3,243

96 1.141 3,170

97 1.122 3,099

98 1.104 3,031

99 1.086 2,964

100 1.068 2,898

101 1.051 2,835

102 1.033 2,773

103 1.016 2,713

104 0.999 2,655

105 0.983 2,597

106 0.966 2,542

107 0.950 2,488

108 0.934 2,436

109 0.918 2,385

110 0.903 2,335

111 0.888 2,286

112 0.873 2,239

113 0.858 2,192

114 0.843 2,147

115 0.829 2,103

116 0.815 2,060

117 0.801 2,018

118 0.787 1,977

119 0.774 1,937

120 0.761 1,898

121 0.748 1,860

122 0.735 1,822

123 0.723 1,786

124 0.710 1,750

125 0.698 1,715

126 0.686 1,680

127 0.674 1,647

128 0.663 1,614

129 0.651 1,582

130 0.640 1,550

131 0.629 1,519

132 0.618 1,489

133 0.608 1,459

134 0.597 1,430

135 0.587 1,401

136 0.577 1,373

137 0.567 1,345

138 0.557 1,318

139 0.548 1,291

140 0.538 1,265

141 0.529 1,240

142 0.520 1,214

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

143 0.511 1,190

144 0.502 1,165

145 0.494 1,141

146 0.485 1,118

147 0.477 1,095

148 0.469 1,072

149 0.461 1,050

150 0.453 1,029

151 0.445 1,007

152 0.438 986

153 0.430 965

154 0.423 945

155 0.416 925

156 0.408 906

157 0.402 887

158 0.395 868

159 0.388 850

160 0.381 832

161 0.375 815

162 0.369 798

163 0.362 782

164 0.356 765

165 0.350 750

166 0.344 734

167 0.339 719

168 0.333 705

169 0.327 690

170 0.322 677

171 0.317 663

172 0.311 650

173 0.306 638

174 0.301 626

175 0.296 614

176 0.291 602

177 0.286 591

178 0.282 581

179 0.277 570

180 0.272 561

181 0.268 551

182 0.264 542

183 0.259 533

184 0.255 524

185 0.251 516

186 0.247 508

187 0.243 501

188 0.239 494

189 0.235 487

190 0.231 480

191 0.228 473

192 0.224 467

193 0.220 461

194 0.217 456

195 0.213 450

196 0.210 445

197 0.206 439

198 0.203 434

199 0.200 429

200 0.197 424

201 0.194 419

202 0.191 415

203 0.188 410

204 0.185 405

205 0.182 401

206 0.179 396

207 0.176 391

208 0.173 386

209 0.171 382

210 0.168 377

211 0.165 372

212 0.163 367

213 0.160 361

214 0.158 356

215 0.155 350

216 0.153 344

217 0.151 338

218 0.148 332

219 0.146 325

220 0.144 318

221 0.142 311

222 0.140 304

223 0.138 297

224 0.135 289

225 0.133 282

Table 33 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop

(Voltage Drop for EWT, LWT, RGT, CNDE, CNDL, Dual Chiller, and OAT)

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

–32 3.705 100,260

–31 3.687 94,165

–30 3.668 88,480

–29 3.649 83,170

–28 3.629 78,125

–27 3.608 73,580

–26 3.586 69,250

–25 3.563 65,205

–24 3.539 61,420

–23 3.514 57,875

–22 3.489 54,555

–21 3.462 51,450

–20 3.434 48,536

–19 3.406 45,807

–18 3.376 43,247

–17 3.345 40,845

–16 3.313 38,592

–15 3.281 38,476

–14 3.247 34,489

–13 3.212 32,621

–12 3.177 30,866

–11 3.140 29,216

–10 3.103 27,633

–9 3.065 26,202

–8 3.025 24,827

–7 2.985 23,532

–6 2.945 22,313

–5 2.903 21,163

–4 2.860 20,079

–3 2.817 19,058

–2 2.774 18,094

–1 2.730 17,184

02.685 16,325

12.639 15,515

22.593 14,749

32.547 14,026

42.500 13,342

52.454 12,696

62.407 12,085

72.360 11,506

82.312 10,959

92.265 10,441

10 2.217 9,949

11 2.170 9,485

12 2.123 9,044

13 2.076 8,627

14 2.029 8,231

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

15 1.982 7,855

16 1.935 7,499

17 1.889 7,161

18 1.844 6,840

19 1.799 6,536

20 1.754 6,246

21 1.710 5,971

22 1.666 5,710

23 1.623 5,461

24 1.580 5,225

25 1.538 5,000

26 1.497 4,786

27 1.457 4,583

28 1.417 4,389

29 1.378 4,204

30 1.340 4,028

31 1.302 3,861

32 1.265 3,701

33 1.229 3,549

34 1.194 3,404

35 1.160 3,266

36 1.126 3,134

37 1.093 3,008

38 1.061 2,888

39 1.030 2,773

40 0.999 2,663

41 0.969 2,559

42 0.940 2,459

43 0.912 2,363

44 0.885 2,272

45 0.858 2,184

46 0.832 2,101

47 0.807 2,021

48 0.782 1,944

49 0.758 1,871

50 0.735 1,801

51 0.713 1,734

52 0.691 1,670

53 0.669 1,609

54 0.649 1,550

55 0.629 1,493

56 0.610 1,439

57 0.591 1,387

58 0.573 1,337

59 0.555 1,290

60 0.538 1,244

61 0.522 1,200

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

62 0.506 1,158

63 0.490 1,118

64 0.475 1,079

65 0.461 1,041

66 0.447 1,006

67 0.433 971

68 0.420 938

69 0.407 906

70 0.395 876

71 0.383 836

72 0.371 805

73 0.360 775

74 0.349 747

75 0.339 719

76 0.329 693

77 0.319 669

78 0.309 645

79 0.300 623

80 0.291 602

81 0.283 583

82 0.274 564

83 0.266 547

84 0.258 531

85 0.251 516

86 0.244 502

87 0.237 489

88 0.230 477

89 0.223 466

90 0.217 456

91 0.211 446

92 0.204 436

93 0.199 427

94 0.193 419

95 0.188 410

96 0.182 402

97 0.177 393

98 0.172 385

99 0.168 376

100 0.163 367

101 0.158 357

102 0.154 346

103 0.150 335

104 0.146 324

105 0.142 312

106 0.138 299

107 0.134 285

Table 34 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop

(For SPT)

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

–25 4.758 196,453

–24 4.750 189,692

–23 4.741 183,300

–22 4.733 177,000

–21 4.724 171,079

–20 4.715 165,238

–19 4.705 159,717

–18 4.696 154,344

–17 4.686 149,194

–16 4.676 144,250

–15 4.665 139,443

–14 4.655 134,891

–13 4.644 130,402

–12 4.633 126,183

–11 4.621 122,018

–10 4.609 118,076

–9 4.597 114,236

–8 4.585 110,549

–7 4.572 107,006

–6 4.560 103,558

–5 4.546 100,287

–4 4.533 97,060

–3 4.519 94,020

–2 4.505 91,019

–1 4.490 88,171

04.476 85,396

14.461 82,729

24.445 80,162

34.429 77,662

44.413 75,286

54.397 72,940

64.380 70,727

74.363 68,542

84.346 66,465

94.328 64,439

10 4.310 62,491

11 4.292 60,612

12 4.273 58,781

13 4.254 57,039

14 4.235 55,319

15 4.215 53,693

16 4.195 52,086

17 4.174 50,557

18 4.153 49,065

19 4.132 47,627

20 4.111 46,240

21 4.089 44,888

22 4.067 43,598

23 4.044 42,324

24 4.021 41,118

25 3.998 39,926

26 3.975 38,790

27 3.951 37,681

28 3.927 36,610

29 3.903 35,577

30 3.878 34,569

31 3.853 33,606

32 3.828 32,654

33 3.802 31,752

34 3.776 30,860

35 3.750 30,009

36 3.723 29,177

37 3.697 28,373

38 3.670 27,597

39 3.654 26,838

40 3.615 26,113

41 3.587 25,396

42 3.559 24,715

43 3.531 24,042

44 3.503 23,399

45 3.474 22,770

46 3.445 22,161

47 3.416 21,573

48 3.387 20,998

49 3.357 20,447

50 3.328 19,903

51 3.298 19,386

52 3.268 18,874

53 3.238 18,384

54 3.208 17,904

55 3.178 17,441

56 3.147 16,991

57 3.117 16,552

58 3.086 16,131

59 3.056 15,714

60 3.025 15,317

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

61 2.994 14,925

62 2.963 14,549

63 2.932 14,180

64 2.901 13,824

65 2.870 13,478

66 2.839 13,139

67 2.808 12,814

68 2.777 12,493

69 2.746 12,187

70 2.715 11,884

71 2.684 11,593

72 2.653 11,308

73 2.622 11,031

74 2.592 10,764

75 2.561 10,501

76 2.530 10,249

77 2.500 10,000

78 2.470 9,762

79 2.439 9,526

80 2.409 9,300

81 2.379 9,078

82 2.349 8,862

83 2.319 8,653

84 2.290 8,448

85 2.260 8,251

86 2.231 8,056

87 2.202 7,869

88 2.173 7,685

89 2.144 7,507

90 2.115 7,333

91 2.087 7,165

92 2.059 6,999

93 2.030 6,838

94 2.003 6,683

95 1.975 6,530

96 1.948 6,383

97 1.921 6,238

98 1.894 6,098

99 1.867 5,961

100 1.841 5,827

101 1.815 5,698

102 1.789 5,571

103 1.763 5,449

104 1.738 5,327

105 1.713 5,210

106 1.688 5,095

107 1.663 4,984

108 1.639 4,876

109 1.615 4,769

110 1.591 4,666

111 1.567 4,564

112 1.544 4,467

113 1.521 4,370

114 1.498 4,277

115 1.475 4,185

116 1.453 4,096

117 1.431 4,008

118 1.409 3,923

119 1.387 3,840

120 1.366 3,759

121 1.345 3,681

122 1.324 3,603

123 1.304 3,529

124 1.284 3,455

125 1.264 3,383

126 1.244 3,313

127 1.225 3,244

128 1.206 3,178

129 1.187 3,112

130 1.168 3,049

131 1.150 2,986

132 1.132 2,926

133 1.114 2,866

134 1.096 2,809

135 1.079 2,752

136 1.062 2,697

137 1.045 2,643

138 1.028 2,590

139 1.012 2,539

140 0.996 2,488

141 0.980 2,439

142 0.965 2,391

143 0.949 2,343

144 0.934 2,297

145 0.919 2,253

146 0.905 2,209

TEMP

(F)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

147 0.890 2,166

148 0.876 2,124

149 0.862 2,083

150 0.848 2,043

151 0.835 2,003

152 0.821 1,966

153 0.808 1,928

154 0.795 1,891

155 0.782 1,855

156 0.770 1,820

157 0.758 1,786

158 0.745 1,752

159 0.733 1,719

160 0.722 1,687

161 0.710 1,656

162 0.699 1,625

163 0.687 1,594

164 0.676 1,565

165 0.666 1,536

166 0.655 1,508

167 0.645 1,480

168 0.634 1,453

169 0.624 1,426

170 0.614 1,400

171 0.604 1,375

172 0.595 1,350

173 0.585 1,326

174 0.576 1,302

175 0.567 1,278

176 0.558 1,255

177 0.549 1,233

178 0.540 1,211

179 0.532 1,190

180 0.523 1,169

181 0.515 1,148

182 0.507 1,128

183 0.499 1,108

184 0.491 1,089

185 0.483 1,070

186 0.476 1,052

187 0.468 1,033

188 0.461 1,016

189 0.454 998

190 0.447 981

191 0.440 964

192 0.433 947

193 0.426 931

194 0.419 915

195 0.413 900

196 0.407 885

197 0.400 870

198 0.394 855

199 0.388 841

200 0.382 827

201 0.376 814

202 0.370 800

203 0.365 787

204 0.359 774

205 0.354 762

206 0.349 749

207 0.343 737

208 0.338 725

209 0.333 714

210 0.328 702

211 0.323 691

212 0.318 680

213 0.314 670

214 0.309 659

215 0.305 649

216 0.300 639

217 0.296 629

218 0.292 620

219 0.288 610

220 0.284 601

221 0.279 592

222 0.275 583

223 0.272 574

224 0.268 566

225 0.264 557

Table 35 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop

(For SPT)

Strainer — Periodic cleaning of the required field-installed

strainer is required. Pressure drop across strainer in excess of

3 psi (21 kPa) indicates the need for cleaning. Normal (clean)

pressure drop is approximately 1 psi (6.9 kPa). Open the

blowdown valve to clean the strainer. If required, shut the chill-

er down and remove the strainer screen to clean. When strainer

has been cleaned, enter ‘YES’ for Strainer Maintenance Done

(Run Status



S.T.MN.

Replacing Defective Modules — The Comfort-

Link™ replacement modules are shown in Table 36. If the main

base board (MBB) has been replaced, verify that all configura-

tion data is correct. Follow the Configuration mode table and

verify that all items under sub-modes UNIT, OPT1 and OPT2

are correct. Any additional field-installed accessories or op-

tions (RSET, SLCT sub-modes) should also be verified as well

as any specific time and maintenance schedules.

Refer to the Start-Up Checklist for 30MP Liquid Chillers

(completed at time of original start-up) found in the job folder.

This information is needed later in this procedure. If the check-

list does not exist, fill out the current information in the Config-

uration mode on a new checklist. Tailor the various options and

configurations as needed for this particular installation.

1. Check that all power to unit is off. Carefully disconnect

all wires from the defective module by unplugging its

connectors.

2. Remove the defective module by removing its mounting

screws with a Phillips screwdriver, and removing the

module from the control box. Save the screws later use.

3. Verify that the instance jumper (MBB) or address switch-

es (all other modules) exactly match the settings of the

defective module.

NOTE: Handle boards by mounting standoffs only to

avoid electrostatic discharge.

4. Package the defective module in the carton of the new

module for return to Carrier.

5. Mount the new module in the unit’s control box using a

Phillips screwdriver and the screws saved in Step 2.

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

–32 4.762 200,510

–31 4.748 188,340

–30 4.733 177,000

–29 4.716 166,342

–28 4.700 156,404

–27 4.682 147,134

–26 4.663 138,482

–25 4.644 130,402

–24 4.624 122,807

–23 4.602 115,710

–22 4.580 109,075

–21 4.557 102,868

–20 4.533 97,060

–19 4.508 91,588

–18 4.482 86,463

–17 4.455 81,662

–16 4.426 77,162

–15 4.397 72,940

–14 4.367 68,957

–13 4.335 65,219

–12 4.303 61,711

–11 4.269 58,415

–10 4.235 55,319

–9 4.199 52,392

–8 4.162 49,640

–7 4.124 47,052

–6 4.085 44,617

–5 4.044 42,324

–4 4.003 40,153

–3 3.961 38,109

–2 3.917 36,182

–1 3.873 34,367

03.828 32,654

13.781 31,030

23.734 29,498

33.686 28,052

43.637 26,686

53.587 25,396

63.537 24,171

73.485 23,013

83.433 21,918

93.381 20,883

10 3.328 19,903

11 3.274 18,972

12 3.220 18,090

13 3.165 17,255

14 3.111 16,464

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

15 3.056 15,714

16 3.000 15,000

17 2.944 14,323

18 2.889 13,681

19 2.833 13,071

20 2.777 12,493

21 2.721 11,942

22 2.666 11,418

23 2.610 10,921

24 2.555 10,449

25 2.500 10,000

26 2.445 9,571

27 2.391 9,164

28 2.337 8,776

29 2.284 8,407

30 2.231 8,056

31 2.178 7,720

32 2.127 7,401

33 2.075 7,096

34 2.025 6,806

35 1.975 6,530

36 1.926 6,266

37 1.878 6,014

38 1.830 5,774

39 1.784 5,546

40 1.738 5,327

41 1.692 5,117

42 1.648 4,918

43 1.605 4,727

44 1.562 4,544

45 1.521 4,370

46 1.480 4,203

47 1.439 4,042

48 1.400 3,889

49 1.362 3,743

50 1.324 3,603

51 1.288 3,469

52 1.252 3,340

53 1.217 3,217

54 1.183 3,099

55 1.150 2,986

56 1.117 2,878

57 1.086 2,774

58 1.055 2,675

59 1.025 2,579

60 0.996 2,488

61 0.968 2,400

TEMP

(C)

VOLTAGE

DROP

(V)

RESISTANCE

(Ohms)

62 0.940 2,315

63 0.913 2,235

64 0.887 2,157

65 0.862 2,083

66 0.837 2,011

67 0.813 1,943

68 0.790 1,876

69 0.767 1,813

70 0.745 1,752

71 0.724 1,693

72 0.703 1,637

73 0.683 1,582

74 0.663 1,530

75 0.645 1,480

76 0.626 1,431

77 0.608 1,385

78 0.591 1,340

79 0.574 1,297

80 0.558 1,255

81 0.542 1,215

82 0.527 1,177

83 0.512 1,140

84 0.497 1,104

85 0.483 1,070

86 0.470 1,037

87 0.457 1,005

88 0.444 974

89 0.431 944

90 0.419 915

91 0.408 889

92 0.396 861

93 0.386 836

94 0.375 811

95 0.365 787

96 0.355 764

97 0.345 742

98 0.336 721

99 0.327 700

100 0.318 680

101 0.310 661

102 0.302 643

103 0.294 626

104 0.287 609

105 0.279 592

106 0.272 576

107 0.265 561

WARNING

Electrical shock can cause personal injury and death. Shut

off all power to this equipment during installation. There

may be more than one disconnect switch. Tag all discon-

nect locations to alert others not to restore power until work

is completed.

6. Reinstall all module connectors. For accessory Naviga-

tor™ device replacement, make sure the plug is installed

at TB3 in the LEN connector.

7. Carefully check all wiring connections before restoring

power.

8. Verify the ENABLE/OFF/REMOTE CONTACT switch

is in the OFF position.

9. Restore control power. Verify that all module red LEDs

blink in unison. Verify that all green LEDs are blinking

and that the scrolling marquee or Navigator™ display is

communicating correctly.

10. Verify all configuration information, settings, set points

and schedules. Return the ENABLE/OFF/REMOTE

CONTACT switch to its previous position.

Table 36 — Replacement Modules

MAINTENANCE

Recommended Maintenance Schedule — The fol-

lowing are only recommended guidelines. Jobsite conditions

may dictate that maintenance schedule is performed more often

than recommended.

Routine:

Every month:

• Check moisture indicating sight glass for possible refrig-

erant loss and presence of moisture.

Every 3 months (for all machines):

• Check refrigerant charge.

• Check all refrigerant joints and valves for refrigerant

leaks, repair as necessary.

• Check chilled water flow switch operation.

• Check compressor oil level.

Every 12 months (for all machines):

• Check all electrical connections, tighten as necessary.

• Inspect all contactors and relays, replace as necessary.

• Check accuracy of thermistors, replace if greater than

± 2° F (1.2° C) variance from calibrated thermometer.

• Check to be sure that the proper concentration of anti-

freeze is present in the chilled water loop, if applicable.

• Verify that the chilled water loop is properly treated.

• Check refrigerant filter driers for excessive pressure

drop, replace as necessary.

• Check chilled water and condenser strainers, clean as

necessary.

• Perform Service Test to confirm operation of all

components.

• Check for excessive cooler approach (Leaving Chilled

Water Temperature — Saturated Suction Temperature)

which may indicate fouling. Clean evaporator if

necessary.

TROUBLESHOOTING

Complete Unit Stoppage and Restart — Possi-

ble causes for unit stoppage and reset methods are shown be-

low and in Table 37. Refer to Fig. 3-7 for component arrange-

ment and control wiring diagrams.

GENERAL POWER FAILURE — After power is restored,

restart is automatic through normal MBB start-up.

UNIT ENABLE-OFF-REMOTE CONTACT SWITCH IS

OFF — When the switch is OFF, the unit will stop immediate-

ly. Place the switch in the ENABLE position for local switch

control or in the REMOTE CONTACT position for control

through remote contact closure.

CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN —

After the problem causing the loss of flow has been corrected,

reset is manual by resetting the alarm with the scrolling

marquee.

OPEN 24-V CONTROL CIRCUIT BREAKER(S) — De-

termine the cause of the failure and correct. Reset circuit break-

er(s). Restart is automatic after MBB start-up cycle is com-

plete.

COOLING LOAD SATISFIED — Unit shuts down when

cooling load has been satisfied. Unit restarts when required to

satisfy leaving fluid temperature set point.

THERMISTOR FAILURE — If a thermistor fails in either an

open or shorted condition, the unit will be shut down. Replace

EWT, or LWT as required. Unit restarts automatically, but must

be reset manually by resetting the alarm with the scrolling

marquee.

LOW SATURATED SUCTION — Several conditions can

lead to low saturated suction alarms and the chiller controls

have several override modes built in which will attempt to keep

the chiller from shutting down. Low fluid flow, low refrigerant

charge and plugged filter driers are the main causes for this

condition. To avoid permanent damage and potential freezing

of the system, do NOT repeatedly reset these alert and/or alarm

conditions without identifying and correcting the cause(s).

COMPRESSOR SAFETIES — The 30MP units with Com-

fortLink™ controls include a compressor protection board that

protects the operation of each of the compressors. Each board

senses the presence or absence of current to each compressor.

If there is a command for a compressor to run and there is

no current, then one of the following safeties or conditions

have turned the compressor off:

Compressor Overcurrent — All compressors have internal

line breaks or a motor protection device located in the com-

pressor electrical box.

Compressor Short Circuit — There will not be current if the

compressor circuit breaker that provides short circuit protection

has tripped.

Compressor Motor Over Temperature — The internal line-

break or over temperature switch has opened.

High-Pressure Switch Trip — The high pressure switch has

opened. See Table 31 for the factory settings for the fixed high

pressure switch.

ASTP Protection Trip — All non-digital Copeland compres-

sors are equipped with an advanced scroll temperature protec-

tion (ASTP). A label located above the terminal box identifies

models that contain this technology. See Fig. 25.

Advanced scroll temperature protection is a form of internal

discharge temperature protection that unloads the scroll com-

pressor when the internal temperature reaches approximately

300 F. At this temperature, an internal bi-metal disk valve

opens and causes the scroll elements to separate, which stops

compression. Suction and discharge pressures balance while

the motor continues to run. The longer the compressor runs un-

loaded, the longer it must cool before the bi-metal disk resets.

See Fig. 26 for approximate reset times.

MODULE

REPLACEMENT

PART NO.

(with Software)

Main Base Board (MBB) 30MP500346

Scrolling Marquee Display HK50AA031

Energy Management Module (EMM) 30GT515218

Navigator Display HK50AA033 CAUTION

If unit stoppage occurs more than once as a result of any of

the safety devices listed, determine and correct cause

before attempting another restart.

To manually reset ASTP, the compressor should be stopped

and allowed to cool. If the compressor is not stopped, the motor

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.

High Discharge Gas Temperature Protection — Units

equipped with optional digital compressors have an additional

thermistor located on the discharge line, If discharge tempera-

ture exceeds 265 F (129.4 C), the digital compressor will be

shut off.

Alarms will also occur if the current sensor board malfunc-

tions or is not properly connected to its assigned digital input. If

the compressor is commanded OFF and the current sensor

reads ON, an alert is generated. This will indicate that a com-

pressor contactor has failed closed. In this case, a special mode,

Compressor Stuck on Control, will be enabled and all other

compressors will be turned off. An alarm will then be enabled

to indicate that service is required. Outdoor fans will continue

to operate. The condenser output is turned on immediately.

Alarms and Alerts — These are warnings of abnormal

or fault conditions, and may cause either one circuit or the

whole unit to shut down. They are assigned code numbers as

described in Table 38.

Automatic alarms will reset without operator intervention if

the condition corrects itself. The following method must be

used to reset manual alarms:

Before resetting any alarm, first determine the cause of the

alarm and correct it. Enter the Alarms mode indicated by the

LED on the side of the scrolling marquee display. Press

and until the sub-menu item RCRN “RESET

ALL CURRENT ALARMS” is displayed. Press .

The control will prompt the user for a password, by displaying

PASS and WORD. Press to display the default pass-

word, 1111. Press for each character. If the password

has been changed, use the arrow keys to change each individu-

al character. Toggle the display to “YES” and press .

The alarms will be reset.

Fig. 25 — Advanced Scroll Temperature

Protection Label

ENTER

Fig. 26 — Recommended Minimum Cool Down Time After Compressor is Stopped*

100

110

120

0 102030405060708090

Compressor Unloaded Run Time (Minutes)

Recommended Cooling Time

(Minutes)

*Times are approximate.

NOTE: Various factors, including high humidity, high ambient temperature,

and the presence of a sound blanket will increase cool-down times.

Table 37 — Troubleshooting

SYMPTOMS CAUSE REMEDY

Compressor Cycles

Off on Loss of Charge

Loss of charge control. Acting erratically. Repair leak and recharge.

Replace control.

Low refrigerant charge Add refrigerant.

Low suction temperature Raise cooler leaving fluid temperature set point.

Compressor Cycles Off on Out

of Range Condition

Thermistor failure Replace thermistor.

System load was reduced faster than controller could

remove stages

Unit will restart after fluid temperature rises back into the

control band. Avoid rapidly removing system load or

increase loop volume.

Temperature controller deadband setting is too low Raise deadband setting.

Compressor Shuts Down on

High-Pressure Control

High-pressure control acting erratically Replace control.

Noncondensables in system Purge system.

Condenser scaled/dirty Clean condenser.

Fans in remote condensing unit (30MPA only) not operating Repair or replace if defective.

System overcharged with refrigerant Reduce charge.

Unit Operates Too Long

or Continuously

Low refrigerant charge Add refrigerant.

Control contacts fused Replace control.

Air in system Purge system.

Partially plugged or plugged expansion valve or filter drier Clean or replace as needed.

Defective insulation Replace or repair as needed.

Service load Keep doors and windows closed.

Damaged compressor Check compressor and replace if necessary.

Unusual or Loud System

Noises

Piping vibration Support piping as required.

Check for loose pipe connections or damaged compressor

Expansion valve hissing Add refrigerant.

Check for plugged liquid line filter drier.

Compressor noisy Replace compressor (worn bearings).

Check for loose compressor holddown bolts.

Compressor Loses Oil Leak in system Repair leak.

Mechanical damage (Failed seals or broken scrolls) Replace compressor.

Oil trapped in line Check piping for oil traps.

Hot Liquid Line Shortage of refrigerant due to leak Repair leak and recharge.

Frosted Liquid Line Restricted filter drier Replace filter drier.

Frosted Suction Line Expansion valve admitting excess refrigerant (note: this is a

normal condition for brine applications)

Replace valve if defective.

Stuck TXV Replace valve if defective.

Freeze-Up Improper charging Make sure a full quantity of fluid is flowing through the cooler

while charging, and suction pressure in cooler is equal to or

greater than pressure corresponding to 32 F (0° C).

System not drained for winter shutdown Recommended that system be filled with an appropriate gly-

col mixture to prevent freezing of pumps and fluid tubing.

Loose Thermistor Verify thermistors are fully inserted in wells.

Table 38 — Alarm and Alert Codes

ALARM/

ALERT

CODE

ALARM

ALERT

DESCRIPTION

WHY WAS THIS

ALARM

GENERATED?

ACTION TAKEN

BY CONTROL

RESET

METHOD

PROBABLE

CAUSE

A048 Alarm Circuit A Compressor

Availability Alarm

Two compressors on circuit

failed Circuit shut down Manual Only one compressor

operating.

T051 Alert Circuit A, Compressor 1

Failure

Compressor feedback signal

does not match relay state

Compressor A1 shut

down. Manual

High-pressure switch open,

faulty CSB, loss of condenser

flow, filter drier plugged, non-

condensables, operation

beyond capability.

A051 Alarm Circuit A, Compressor 1

Failure

Respective current sensor

board (CSB) feedback signal

is ON when the compressor

should be off

Unit shut down Manual

High-pressure switch open,

faulty CSB, loss of condenser

flow, filter drier plugged, non-

condensables, operation

beyond capability.

T052 Alert Circuit A, Compressor 2

Failure

Compressor feedback signal

does not match relay state

Compressor A2 shut

down. Manual

High-pressure switch open,

faulty CSB, loss of condenser

flow, filter drier plugged, non-

condensables, operation

beyond capability.

A052 Alarm Circuit A, Compressor 2

Failure

Respective current sensor

board (CSB) feedback signal

is ON when the compressor

should be off

Unit shut down Manual

High-pressure switch open,

faulty CSB, loss of condenser

flow, filter drier plugged, non-

condensables, operation

beyond capability.

T053 Alert Circuit A, Compressor 3

Failure

Compressor feedback signal

does not match relay state

Compressor A3 shut

down. Manual

High-pressure switch open,

faulty CSB, loss of condenser

flow, filter drier plugged, non-

condensables, operation

beyond capability.

A053 Alarm Circuit A, Compressor 3

Failure

Respective current sensor

board (CSB) feedback signal

is ON when the compressor

should be off

Unit shut down Manual

High-pressure switch open,

faulty CSB, loss of condenser

flow, filter drier plugged, non-

condensables, operation

beyond capability.

A060 Alarm Cooler Leaving Fluid

Thermistor Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Chiller shut down

immediately Automatic Thermistor failure, damaged

cable/wire or wiring error.

A061 Alarm Cooler Entering Fluid

Thermistor Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Chiller shut down

immediately Automatic Thermistor failure, damaged

cable/wire or wiring error.

T062 Alert Condenser Leaving Fluid

Thermistor Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Alert only.

No action taken.

Automatic Thermistor failure, damaged

cable/wire or wiring error.

T063 Alert Condenser Entering Fluid

Thermistor Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Alert only.

No action taken.

Automatic Thermistor failure, damaged

cable/wire or wiring error.

T068 None Circuit A Return Gas

Thermistor Failure

If return gas sensors are

enabled (RG.EN) and

thermistor is outside range of

–40 to 245 F (–40 to 118 C)

Circuit A shut down Automatic Thermistor failure, damaged

cable/wire or wiring error.

T073 Alert Outside Air Thermistor

Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

(if enabled)

Temperature reset

disabled. Chiller runs

under normal control/set

points.

Automatic Thermistor failure, damaged

cable/wire or wiring error.

T074 Alert Space Temperature/Dual Chiller

Thermistor Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

(if enabled)

Temperature reset

disabled. Chiller runs

under normal control/set

points.

Automatic Thermistor failure, damaged

cable/wire or wiring error.

A077 Alarm

Circuit A Saturated

Suction Temperature

exceeds Cooler Leaving

Fluid Temperature

Faulty expansion valve,

suction pressure transducer

or leaving fluid thermistor.

Circuit A shutdown after

pumpdown complete. Manual

Faulty expansion valve or

suction pressure transducer

or leaving fluid thermistor.

T079 Alert Lead/Lag LWT

Thermistor Failure

Thermistor outside range of

–40 to 245 F (–40 to 118 C)

Chiller runs as a stand

alone machine Automatic

Dual LWT thermistor failure,

damaged cable/wire or

wiring error.

A090 Alarm Circuit A Discharge

Pressure Transducer Failure Outside of range (0 - 667 psig) Circuit A shut down Automatic

Transducer failure, poor

connection to MBB, or wiring

damage/error.

A092 Alarm Circuit A Suction

Pressure Transducer Failure Outside of range (0 - 420 psig) Circuit A shut down Automatic

Transducer failure, poor

connection to MBB, or wiring

damage/error.

T094 Alert Discharge Gas

Thermistor Failure

Discharge thermistor (DTT) is

either open or shorted

Digital compressor shut

down. Automatic Thermistor failure, damaged

cable/wire or wiring error.

A110 Alarm Circuit A Loss of Charge

If the compressors are off

and discharge pressure

reading is < 26 psig for

30 sec.

Circuit not allowed to

start. Manual Refrigerant leak or

transducer failure

A112 Alarm Circuit A High Saturated

Suction Temperature

Circuit saturated suction

temperature pressure

transducer > 70 F (21.1 C)

for 5 minutes

Circuit shut down Manual

Faulty Expansion valve,

faulty suction pressure

transducer or high entering

fluid temperature.

A114 Alarm Circuit A Low Suction

Superheat

Suction superheat is

less than 5° F (2.8 C) for 5

minutes. (if RGT installed)

Circuit A shut down.

Automatic restart

after first daily

occurrence.

Manual restart

thereafter.

Faulty expansion valve,

faulty suction pressure

transducer, faulty suction gas

thermistor, circuit

overcharged

Table 38 — Alarm and Alert Codes (cont)

See legend on page 51.

ALARM/

ALERT

CODE

ALARM

ALERT

DESCRIPTION

WHY WAS THIS

ALARM

GENERATED?

ACTION TAKEN

BY CONTROL

RESET

METHOD

PROBABLE

CAUSE

A116 Alarm Circuit A Low Cooler

Suction Temperature

Mode 7 caused the com-

pressor to unload 6 consecu-

tive times with less than a

30-minute interval between

each circuit shutdown.

Circuit shut down Manual

Faulty expansion valve, low

refrigerant charge, plugged

filter drier, faulty suction

pressure transducer, low

cooler fluid flow

A122 Alarm High Pressure Switch

Trip Circuit A

High Pressure A Switch

Input opento MBB Circuit shut down Manual Faulty transducer/high

pressure switch.

A126 Alarm Circuit A High

Discharge Pressure

SCT >Maximum condensing

temperature from operating

envelope

Circuit shut down

Automatic, only

after first 3 daily

occurrences.

Manual reset

thereafter. Read-

ing from OAT sen-

sor must drop 5 F

(2.8 C) before

restart

Faulty transducer/high

pressure switch, low/

restricted condenser

airflow

T133 Alert Circuit A Low Suction

Pressure

Suction pressure below

34 psig for 8 seconds or

below 23 psig

Circuit shut down

Automatic

restart after first

daily occurrence.

Manual restart

thereafter.

Faulty or plugged EXV, low

refrigerant charge, EXV out

of adjustment, liquid

line valve partially closed

A140 Alert Reverse Rotation

Detected

Incoming chiller power leads

not phased correctly

Chiller not allowed to

start. Manual

Reverse any two incoming

power leads to correct. Check

for correct fan rotation first.

A150 Alarm Emergency Stop CCN emergency stop

command received

Chiller shutdown

without going through

pumpdown.

Automatic once

CCN command for

EMSTOP returns to

normal

CCN Network

command.

A151 Alarm Illegal Configuration One or more illegal

configurations exists.

Chiller is not allowed to

start.

Manual once

configuration errors

are corrected

Configuration error.

Check unit settings.

A152 Alarm Unit Down Due to

Failure

Both circuits are down due

to alarms/alerts.

Chiller is unable

to run.

Automatic once

alarms/alerts are

cleared that pre-

vent the chiller from

starting.

Alarm notifies user

that chiller is 100%

down.

T153 Alert Real Time Clock

Hardware Failure Internal clock on MBB fails

Occupancy schedule

will not be used. Chiller

defaults to Local On

mode.

Automatic when

correct clock con-

trol restarts.

Time/Date/Month/

Day/Year not

properly set.

A154 Alarm Serial EEPROM

Hardware Failure Hardware failure with MBB Chiller is unable

to run. Manual Main Base Board

failure.

T155 Alert Serial EEPROM

Storage Failure

Configuration/storage

failure with MBB No Action Manual

Potential failure of

MBB. Download

current operating

software. Replace

MBB if error occurs again.

A156 Alarm Critical Serial EEPROM

Storage Failure

Configuration/storage

failure with MBB

Chiller is not allowed

to run. Manual Main Base Board

failure.

A157 Alarm A/D Hardware Failure Hardware failure with

peripheral device

Chiller is not allowed

to run. Manual Main Base Board

failure.

T173 Alert Loss of Communication

with EMM

MBB loses communication

with EMM

4 to 20 mA

temperature reset

disabled. Demand

Limit set to 100%. 4 to

20 mA set point

disabled.

Automatic

Wiring error, faulty

wiring or failed

Energy Management Module

(EMM).

T174 Alert 4 to 20 mA Cooling Set

Point Input Failure

If configured with EMM and

input less than 2 mA or

greater than 22 mA

Set point function

disabled. Chiller

controls to CSP1.

Automatic

Faulty signal

generator, wiring

error, or faulty EMM.

T176 Alert

4 to 20 mA

Temperature Reset

Input Failure

If configured with EMM

and input less than 2 mA or

greater than 22 mA

Reset function

disabled. Chiller

returns to normal set

point control.

Automatic

Faulty signal

generator, wiring

error, or faulty EMM.

T177 Alert 4 to 20 mA Demand

Limit Input Failure

If configured with EMM and

input less than 2 mA or

greater than 22 mA

Demand limit function

disabled. Chiller

returns to 100%

demand limit

control.

Automatic

Faulty signal

generator, wiring

error, or faulty EMM.

Table 38 — Alarm and Alert Codes (cont)

ALARM/

ALERT

CODE

ALARM

ALERT

DESCRIPTION

WHY WAS THIS

ALARM

GENERATED?

ACTION TAKEN

BY CONTROL

RESET

METHOD

PROBABLE

CAUSE

T200 Alert

Cooler Flow/Interlock

Contacts failed to Close

at start-up

Cooler flow switch contacts

failed to close within

1 minute (if cooler pump

control is enabled) or

within 5 minutes (if cooler

pump control is not

enabled) after start-up

Chiller not allowed to

start. For models with

dual pumps, the

second pump will be

started if available

Manual Faulty flow switch or

interlock.

A201 Alarm

Cooler Flow/Interlock

Contacts Opened

During Normal

Operation

Flow switch opens for at

least 3 seconds after

being initially closed

All compressors shut

down. For models with

dual pumps, the

second pump will be

started if available

Manual

Cooler pump failure,

faulty flow switch or

interlock.

A202 Alarm

Cooler Pump Interlock

Closed When Pump is

Off

If configured for cooler

pump control and flow

switch input is closed for

5 minutes while pump

output(s) are off

Chiller shut down Automatic when

aux contacts open

Wiring error, faulty

pump contactor

(welded contacts)

T203 Alert Loss of Communication

with slave chiller

Master chiller MBB

loses communication

with slave chiller MBB

Dual chiller control

disabled. Chiller runs

as a stand-alone

machine.

Automatic

Wiring error, faulty

wiring, failed Slave

chiller MBB module,

power loss at slave

chiller, wrong slave

address.

T204 Alert Loss of Communication

with master chiller

Slave chiller MBB loses

communication with

master chiller MBB

Dual chiller control

disabled. Chiller runs

as a stand-alone

machine

Automatic

Wiring error, faulty

wiring, failed master

chiller MBB module,

power loss at Master

chiller.

T205 Alert Master and slave chiller

with same address

Master and slave chiller

have the same CCN

address (CCN.A)

Dual chiller routine

disabled. Master/slave

run as stand-alone

chillers.

Automatic

CCN Address for

both chillers is the

same. Must be

different. Check

CCN.A under the

OPT2 sub-mode in

Configuration at both

chillers.

T206 Alert High Leaving Chilled

Water Temperature

LWT read is greater than

LCW Alert Limit, Total

capacity is 100% and LWT

is greater than LWT

reading one minute ago

Alert only. No action

taken. Automatic

Building load greater

than unit capacity,

low water/brine flow

or compressor fault.

Check for other

alarms/alerts.

A207 Alarm Cooler Freeze

Protection

Cooler EWT or LWT is less

than Brine Freeze (BR.FZ)

Chiller shutdown

without going through

pumpdown. Cooler

pump continues to

run a minimum of

5 minutes (if control

enabled).

Both EWT and LWT

must be at least 6 F

(3.3 C) above Brine

Freeze point

(BR.FZ). Automatic

for first, Manual reset

there after.

Faulty thermistor

(T1/T2), low water

flow.

A208 Alarm EWT or LWT

Thermistor failure

Cooler EWT is less than

LWT by 3° F (1.7° C) for

1 minute after a circuit is

started

Chiller shutdown.

Cooler pump shut off

(if control enabled).

Manual

Faulty cooler pump,

low water flow,

plugged fluid

strainer.

A220 Alarm Condenser Pump

Interlock Failure to

at Start-Up

If configured for con-

denser pump interlock

and the flow switch

input fails to close with-

in 5 minutes after start-

up. Also valid when

configured for con-

denser pump control.

Condenser and cooler

pumps shut off.

Chiller shutdown with-

out going through

pumpdown.

Manual Failure of condenser

pump or controls.

Wiring error.

A221 Alarm Condenser Pump

Interlock Opened During

Normal Operation

If configured for con-

denser pump interlock

and the flow switch

opens for 15 seconds

during normal

operation (or when

the condenser pump

relay is on when con-

denser pump control

is configured.)

Condenser and cooler

pumps shut off. Chiller

shutdown without

going through pump-

down.

Manual Failure of condenser

pump or controls.

Wiring error.

A222 Alarm Condenser Pump

Interlock Closed When

Pump is Off

If configured for con-

denser pump interlock

condenser pump con-

trol, and the flow

switch is closed

when pump relay is off.

Chiller is not allowed to

start.

Manual Failure of condenser

pump relays or inter-

locks, welded

contacts.

Table 38 — Alarm and Alert Codes (cont)

LEGEND

COMPRESSOR FAILURE ALERTS

A048 (Circuit A Compressor Availability Alarm) — This

alarm occurs when two compressors are unavailable to run on

a 3 compressor circuit. The control ensures proper oil return by

ensuring a circuit does not operate with one compressor for

longer than one hour of cumulative run time.

T051, T052, T053 (Circuit A Compresser Failures) — Alert

codes 051, 052, and 053 are for compressors A1, A2, and A3

respectively. These alerts occur when the current sensor (CS)

does not detect compressor current during compressor opera-

tion. When this occurs, the control turns off the compressor.

If the current sensor board reads OFF while the compressor

relay has been commanded ON, an alert is generated.

POSSIBLE CAUSES

Compressor Overload — Either the compressor internal over-

load protector is open or the external overload protector (Kri-

wan module) has activated. The external overload protector

modules are mounted in the compressor wiring junction box.

Temperature sensors embedded in the compressor motor wind-

ings are the inputs to the module. The module is powered with

24 vac from the units main control box. The module output is a

normally closed contact that is wired in series with the com-

pressor contactor coil. In a compressor motor overload condi-

tion, contact opens, deenergizing the compressor contactor.

Low Refrigerant Charge — If the compressor operates for an

extended period of time with low refrigerant charge, the com-

pressor ASTP device will open, which will cause the compres-

sor to trip on its overload protection device.

Circuit Breaker Trip — The compressors are protected from

short circuit by a breaker in the control box.

Wiring Error — A wiring error might not allow the compres-

sor to start.

To check out alerts T051-T053:

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 in-

ternal protection, circuit breaker trip, incorrect safety wir-

ing, or incorrect compressor wiring.

2. If the compressor does start, verify it is rotating in the cor-

rect direction.

COMPRESSOR STUCK ON FAILURE ALARMS

Circuit A A051, A052, A053 — Alarm codes 051, 052, and

053 are for compressors A1, A2, and A3. These alarms occur

when the CSB detects current when the compressor should be

off. When this occurs, the control turns off the compressor.

If the current sensor board reads ON while the compressor

relay has been commanded OFF for a period of 4 continuous

seconds, an alarm is generated. These alarms are only moni-

tored for a period of 10 seconds after the compressor relay has

ALARM/

ALERT

CODE

ALARM

ALERT

DESCRIPTION

WHY WAS THIS

ALARM

GENERATED?

ACTION TAKEN

BY CONTROL

RESET

METHOD

PROBABLE

CAUSE

T302 Alert

Strainer Blowdown

Scheduled

Maintenance Due

Strainer Service

Countdown (S.T.DN)

expired. Complete strainer

blowdown and enter 'YES'

for Strainer Maintenance

Done (S.T.MN) item.

None Automatic

Routine strainer

maintenance

required

T500 Alert Current Sensor Board

A1 Failure

Alert occurs when CSB out-

put is a constant high value

Compressor A1 shut

down Automatic CSB failure.

T501 Alert Current Sensor Board

A2 Failure

Alert occurs when CSB out-

put is a constant high value

Compressor A2 shut

down Automatic CSB failure.

T502 Alert Current Sensor Board

A3 Failure

Alert occurs when CSB out-

put is a constant high value

Compressor A3 shut

down Automatic CSB failure.

T950 Alert Loss of Communication

with Water System

Manager

No communications have

been received by the MBB

within 5 minutes of last

transmission

WSM forces removed.

Chiller runs under own

control

Automatic Failed module, wiring

error, failed

transformer, loose

connection plug,

wrong address

T951 Alert Loss of Communication

with Chillervisor System

Manager

No communications have

been received by the MBB

within 5 minutes of last

transmission

CSM forces removed.

Chiller runs under own

control

Automatic Failed module, wiring

error, failed

transformer, loose

connection plug,

wrong address

CCN — Carrier Comfort Network

CSB — Current Sensor Board

CSM — Chiller System Manager

CXB — Compressor Expansion Board

EEPROM — Electronic Eraseable Programmable Read Only Memory

EMM — Energy Management Module

EWT — Entering Fluid Temperature

EXV — Electronic Expansion Valve

HSM — Hydronic System Manager

LCW — Leaving Chilled Water

LWT — Leaving Fluid Temperature

MBB — Main Base Board

OAT — Outdoor-Air Temperature

RGT — Return Gas Thermistor

WSM — Water System Manager

IMPORTANT: Prolonged operation in the wrong direction

can damage the compressor. Correct rotation can be veri-

fied by a gage set and looking for a differential pressure

rise on start-up.

IMPORTANT: If the CS is always detecting current, 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 the CSB wiring and

replace if necessary.

IMPORTANT: Return to Normal mode and observe com-

pressor operation to verify that compressor current sensor

is working.

been commanded OFF. This is done to facilitate a service tech-

nician forcing a relay to test a compressor.

In addition, if a compressor stuck failure occurs and the cur-

rent sensor board reports the compressor and the request off,

certain diagnostics will take place as follows:

1. If any of the compressors are diagnosed as stuck on and

the current sensor board is on and the request is off, the

control will command the condenser fans to maintain

normal head pressure.

2. The control will shut-off all other compressors.

The possible causes include welded contactor or frozen

compressor relay on the MBB.

To check out alarms A051 to A053:

1. Place the unit in Service Test mode. All compressors

should be off.

2. 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.

3. Check for welded contactor.

4. Verify CSB wiring.

5. Return to Normal mode and observe compressor opera-

tion to verify that compressor current sensor is working

and condenser fans are energized.

A060 (Cooler Leaving Fluid Thermistor Failure) — The

sensor reading is outside the range of –40 to 245 F (–40 to

118 C) then the alarm will occur. The cause of the alarm is usu-

ally a faulty thermistor, a shorted or open thermistor caused by

a wiring error, or a loose connection. Failure of this thermistor

will shut down the entire unit.

A061 (Cooler Entering Thermistor Failure) — If the sensor

reading is outside the range of –40 to 240 F (–40 to116 C) then

the alarm will occur. The cause of the alarm is usually a faulty

thermistor, a shorted or open thermistor caused by a wiring er-

ror, or a loose connection. Failure of this thermistor will shut

down the entire unit.

T062 (Condenser Leaving Fluid Thermistor Failure) — The

sensor reading is outside the range of –40 to 245 F (–40 to

118 C) then the alert will occur. The cause of the alert is usually

a faulty thermistor, a shorted or open thermistor caused by a

wiring error, or a loose connection. Failure of this thermistor

will send out an alert only.

T063 (Condenser Entering Thermistor Failure) — If the sen-

sor reading is outside the range of –40 to 240 F (–40 to116 C)

then the alert will occur. The cause of the alert is usually a

faulty thermistor, a shorted or open thermistor caused by a wir-

ing error, or a loose connection.Failure of this thermistor will

send out an alert only.

T068 (Circuit A Compressor Return Gas Temperature

Thermistor Failure) — This alert occurs if the RGT is config-

ured and the compressor return gas temperature sensor is out-

side the range of –40 to 240 F (–40 to 116 C). Failure of this

thermistor will shut down the appropriate circuit.

T073 (Outside Air Temperature Thermistor Failure) — This

alert occurs when the outside air temperature sensor is outside

the range of –40 to 240 F (–40 to 116 C). Failure of this therm-

istor will disable any elements of the control which requires its

use. The OAT must be configured.

T074 (Space Temperature Thermistor Failure) — This alert

occurs when the space temperature sensor is outside the range

of –40 to 245 F (–40 to 118 C). Failure of this thermistor will

disable any elements of the control which requires its use. The

cause of the alert is usually a faulty thermistor in the T55, or

T58 device, a shorted or open thermistor caused by a wiring er-

ror, or a loose connection. The SPT must be configured.

A077 (Circuit Saturated Suction Temperature Exceeds

Cooler Leaving Water Temperature) — This alarm occurs

when the saturated suction temperature (SST) is greater than

leaving water for 5 minutes. This alarm will occur if either the

suction pressure transducer reading, which is used to calculate

SST, or cooler leaving water is incorrect. Potential causes for

this alarm are loose wiring connection, sensor not located in

well or bad Schrader fitting. Reset is manual.

T079 (Dual Chiller Thermistor Failure) — This alert occurs

when the dual chiller temperature sensor is outside its range of

–40 to 240 F. Failure of this thermistor will disable Dual Chill-

er operation and return to stand-alone operation. The unit must

be configured for Dual Chiller operation for this alert to occur.

The cause of the alert is usually a faulty thermistor, a shorted or

open thermistor caused by a wiring error, or a loose connection.

Reset is automatic.

A090 (Circuit A Discharge Pressure Transducer Failure) —

This alarm occurs when the pressure is outside the range of 0.0

to 667.0 psig. A circuit cannot run when this alarm is active.

Use the scrolling marquee to reset the alarm. The cause of the

alarm is usually a faulty transducer, faulty 5-v power supply, or

a loose connection.

A092 (Circuit A Suction Pressure Transducer Failure) —

This alarm occurs when the pressure is outside the range of 0.0

to 420.0 psig. A circuit cannot run when this alarm is active.

Use the scrolling marquee to reset the alarm. The cause of the

alarm is usually a faulty transducer, faulty 5-v power supply, or

a loose connection.

T094 (Discharge Gas Thermistor Failure) — This alert oc-

curs for units which have the digital compressor installed on

circuit A. If discharge gas temperature is open or shorted, the

circuit will be shut off. The alert will reset itself when discharge

temperature is less than 250 F (121.1 C). The cause of the alert

is usually low refrigerant charge or a faulty thermistor.

A110 (Circuit A Loss of Charge) — This alarm occurs when

the compressor is OFF and the discharge pressure is less than

26 psig.

A112 (Circuit A High Saturated Suction Temperature) —

Alarm code 112 occurs when compressors in a circuit have

been running for at least 5 minutes and the circuit saturated

suction temperature is greater than 70 F (21.1 C). The high sat-

urated suction alarm is generated and the circuit is shut down.

A114 (Circuit A Low Superheat) — Alarm code 114 occurs

when the superheat of a circuit is less than 5 F (2.8 C) for 5

continuous minutes. The low superheat alarm is generated and

the circuit is shut down. The RGT sensor must be installed.

A122 (Circuit A, High Pressure Switch Failure) — The

high pressure switch is wired in series with the compressor

contactor coils of each compressor on the circuit to disable

compressor operation immediately upon a high discharge pres-

sure condition. The normally closed contacts in the switches

are calibrated to open at 650 ± 10 psig which corresponds to a

saturated condensing temperature of 155.6 ± 1.3 F. The pres-

sure switches will automatically reset when the discharge pres-

sure is reduced to 500 ± 15 psig which corresponds to a saturat-

ed condensing temperature of 134.1 ± 2.4 F.

The output of the high pressure switch is wired to inputs on

the MBB to provide the control with an indication of a high

pressure switch trip. This alert could occur when compressors

are off if the wiring to the switch is broken or the switch has

failed open.

If the high pressure switch trips on a circuit with compres-

sors commanded on, the discharge pressure is recorded. If the

recorded discharge pressure is between 630 to 660 psig (satu-

rated condensing temperature between 153.0 and 156.9 F), and

is also less than the value recorded on any previous high pres-

sure switch trip, the upper horizontal portion of the compressor

operating envelope (see Fig. 12) is lowered 0.4 F (3 psig). The

control will not allow the compressor operating envelope to be

lowered below 153.0 F (630 psig).

This is done to make a rough calibration of the high pres-

sure switch trip point. In most cases this allows the control to

detect a high head pressure condition prior to reaching the high

pressure switch trip point.

When the trip occurs, all mechanical cooling on the circuit

is shut down for 15 minutes. After 15 minutes, the circuit is al-

lowed to restart.

A126 (Circuit A High Head Pressure) — This alarm occurs

when the appropriate saturated condensing temperature is

greater than the operating envelope shown in Fig 12. Prior to

the alarm, the control will shut down one compressor on a cir-

cuit if that circuit's saturated condensing temperature is greater

than the maximum SCT minus 5° F (2.7° C). If SCT continues

to rise to greater than the maximum SCT, the alarm will occur

and the circuit's remaining compressor will shut down. The

cause of the alarm is usually an overcharged system, high out-

door ambient temperature coupled with dirty outdoor coil

(30MPA only), plugged filter drier, a faulty high-pressure

switch, or loss of condenser water flow.

A140 (Reverse Rotation Detected) — A test is made once, on

power up, for suction pressure change on the first activated cir-

cuit. The unit control determines failure as follows:

1. The suction pressure is sampled 5 seconds before the

compressor is brought on, right when the compressor is

brought on and 5 seconds afterwards.

2. The rate of suction pressure change from 5 seconds be-

fore the compressor is brought on to when the compres-

sor is brought on is calculated.

3. The rate of suction pressure change from when the

compressor is brought on to 5 seconds afterwards is

calculated.

4. With the above information, the test for reverse rotation is

made. If the suction pressure change 5 seconds after com-

pression is greater than the suction pressure change 5 sec-

onds before compression – 1.25, then there is a reverse

rotation error.

This alarm will disable mechanical cooling and will require

manual reset. This alarm may be disabled once the reverse ro-

tation check has been verified by setting REV.R = Yes.

A150 (Unit is in Emergency Stop) — If the CCN emergency

stop command is received, the alarm is generated and the unit

will be immediately stopped.

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."

A151 (Illegal Configuration) — An A151 alarm indicates an

invalid configuration has been entered. The following are ille-

gal configurations.

• Invalid unit size has been entered.

• Unit configuration set to invalid type.

A152 (Unit Down Due to Failure) — Reset is automatic

when all alarms are cleared. This alarm indicates the unit is at

0% capacity.

T153 (Real Time Clock Hardware Failure) — A problem

has been detected with MBB real time clock hardware. Try re-

setting the power and check the indicator lights. If the alarm

continues, the board should be replaced.

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.

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 detect-

ed 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.

T173 (Energy Management Module Communication Fail-

ure) — This alert indicates that there are communications

problems with the energy management. All functions per-

formed by the EMM will stop, which can include demand lim-

it, reset and capacity input. The alert will automatically reset.

T174 (4 to 20 mA Cooling Set point Input Failure) — This

alert indicates a problem has been detected with cooling set

point 4 to 20 mA input. The input value is either less than 2 mA

or greater than 22 mA.

T176 (4 to 20 mA Reset Input Failure) — This alert indi-

cates a problem has been detected with reset 4 to 20 mA input.

The input value is either less than 2 mA or greater than 22 mA.

The reset function will be disabled when this occurs.

T177 (4 to 20 mA Demand Limit Input Failure) — This

alert indicates a problem has been detected with demand limit

4 to 20 mA input. The input value is either less than 2 mA or

greater than 22 mA. The reset function will be disabled when

this occurs.

T500, T501, T502 (Current Sensor Board Failure — A xx

Circuit A — Alert codes 500, 501, and 502 are for compres-

sors A1, A2, and A3 respectively. These alerts occur when the

output of the CSB is a constant high value. These alerts reset

automatically. If the problem cannot be resolved, the CSB must

be replaced.

APPENDIX A — LOCAL DISPLAY TABLES

Run Status Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

VIEW

AUTO VIEW OF RUN STATUS

EWT xxx.x ºF Entering Fluid Temp EWT

LWT xxx.x ºF Leaving Fluid Temp LWT

SETP xxx.x ºF Active Setpoint SP

CTPT xxx.x ºF Control Point CTRL_PNT

LOD.F xxx Load/Unload Factor SMZ

STAT Control Mode STAT

OCC NO/YES Occupied OCC

MODE NO/YES Override Modes in

Effect MODE

CAP xxx Percent Total Capacity CAP_T

STGE x Requested Stage STAGE

ALRM xxx Current Alarms & Alerts ALRMALRT

TIME xx.xx Time of Day TIMECOPY 00:00-23:59

MNTH xx Month of Year MOY 1 - 12 (1 = January,

2 = February, etc.)

DATE xx Day of Month DOM 01-31

YEAR xx Year of Century YOCDISP

RUN

UNIT RUN HOUR AND START

HRS.U xxxx HRS Machine Operating

Hours HR_MACH 0 to 999999

STR.U xxxx Machine Starts CY_MACH 0 to 1000000

HR.P1 xxxx HRS Cooler Pump Run

Hours HR_CPUMP 0 to 999999.9

HR.P2 xxxx HRS Condenser Pump Run

Hours HR_DPUMP 0 to 999999.9

HOUR

CIRC AND COMP RUN HOURS

HR.A1 xxxx HRS Compressor A1 Run

Hours HOURS_A1 0 to 999999

HR.A2 xxxx HRS Compressor A2 Run

Hours HOURS_A2 0 to 999999

HR.A3 xxxx HRS Compressor A3 Run

Hours HOURS_A3 0 to 999999

STRT

COMPRESSOR STARTS

ST.A1 xxxx Compressor A1 Starts CY_A1 0 to 999999

ST.A2 xxxx Compressor A2 Starts CY_A2 0 to 999999

ST.A3 xxxx Compressor A3 Starts CY_A3 0 to 999999

PREVENTIVE MAINTENANCE

STRN STRAINER MAINTENANCE

SI.ST xxxx HRS Strainer Srvc Interval SI_STRNR 0 to 65535

S.T.DN xxxx HRS Strainer Srvc Count-

down ST_CDOWN 0 to 65535

S.T.MN NO/YES Strainer Maint. Done ST_MAINT

ST.DT STRAINER MAINT. DATES

S.T.M0 MM/DD/YY HH:MM

S.T.M1 MM/DD/YY HH:MM

S.T.M2 MM/DD/YY HH:MM

S.T.M3 MM/DD/YY HH:MM

S.T.M4 MM/DD/YY HH:MM

VERS

SOFTWARE VERSION NUMBERS

AUX CESR131333-xx-xx

MBB CESR131279-xx-xx

EMM CESR131174-xx-xx

MARQ CESR131171-xx-xx

NAVI CESR130227-xx-xx

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Service Test Mode and Sub-Mode Directory

Temperature Mode and Sub-Mode Directory

Pressures Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

TEST ON/OFF Service Test Mode MAN_CTRL

To enable Service Test mode, move

Enable/Off/Remote contact switch

OFF. Change TEST to ON.

Move switch to ENABLE

OUTS

OUTPUTS AND PUMPS

CLR.P OFF/ON Cooler Pump Relay S_CLPMP

CND.P OFF/ON Condenser Pump S_CNDPMP

UL.TM xx Comp A1 Unload Time S_A1ULTM 0 to 15

CC.H OFF/ON Crankcase Heater S_CCH

CW.VO OFF/ON Condenser Valve Open S_CWVO

CW.VC OFF/ON Condenser Valve Close S_CWVC

LL.SV OFF/ON Liquid Line Solenoid S_LLSV

RMT.A OFF/ON Remote Alarm Relay S_ALM

CMPA

CIRCUIT A COMPRESSOR TST

CC.A1 OFF/ON Compressor A1 Relay S_A1_RLY

UL.TM xx Comp A1 Unload Time S_A1ULTM 0 to 15

CC.A2 OFF/ON Compressor A2 Relay S_A2_RLY

CC.A3 OFF/ON Compressor A3 Relay S_A3_RLY

MLV OFF/ON Minimum Load Valve Relay S_MLV

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT

UNIT

ENT AND LEAVE UNIT TEMPS

CEWT xxx.x °F Cooler Entering Fluid COOL_EWT

CLWT xxx.x °F Cooler Leaving Fluid COOL_LWT

CDET xxx.x °F Condenser Entering Fluid COND_EWT

CDLT xxx.x °F Condenser Leaving Fluid COND_LWT

OAT xxx.x °F Outside Air Temperature OAT

SPT xxx.x °F Space Temperature SPT

DLWT xxx.x °F Lead/Lag Leaving Fluid DUAL_LWT

CIR.A

TEMPERATURES CIRCUIT A

SCT.A xxx.x °F Saturated Condensing Tmp TMP_SCTA

SST.A xxx.x °F Saturated Suction Temp TMP_SSTA

RGT.A xxx.x °F Compr Return Gas Temp TMP_RGTA

D.GAS xxx.x °F Discharge Gas Temp DISGAS

SH.A xxx.x ΔF Suction Superheat Temp SH_A

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT

PRC.A

PRESSURES CIRCUIT A

DP.A xxx.x PSIG Discharge Pressure DP_A

SP.A xxx.x PSIG Suction Pressure SP_A

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Set Points Mode and Sub-Mode Directory

Inputs Mode and Sub-Mode Directory

Outputs Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION RANGE CCN POINT

COOL

COOLING SETPOINTS

CSP.1 xxx.x °F Cooling Setpoint 1 –20 to 70 CSP1

CSP.2 xxx.x °F Cooling Setpoint 2 –20 to 70 CSP2

CSP.3 xxx.x °F ICE Setpoint –20 to 32 CSP3

HEAD HEAD PRESSURE SETPOINTS

H.DP xxx.x °F Head Setpoint 85 to 120 HSP

FRZ BRINE FREEZE SETPOINT

BR.FZ xx.x °F Brine Freeze Point –20 to 34 BRN_FRZ

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT

GEN.I

GENERAL INPUTS

STST OFF/ON Start/Stop Switch START

FLOW OFF/ON Cooler Flow Switch COOLFLOW

CD.FL OFF/ON Condenser Flow Switch CONDFLOW

DLS1 OFF/ON Demand Limit Switch 1 DMD_SW1

DLS2 OFF/ON Demand Limit Switch 2 DMD_SW2

ICED OFF/ON Ice Done ICE_DONE

DUAL OFF/ON Dual Setpoint Switch DUAL_IN

CRCT

CIRCUIT INPUTS

FKA1 OFF/ON Compressor A1 Feedback K_A1_FBK

FKA2 OFF/ON Compressor A2 Feedback K_A2_FBK

FKA3 OFF/ON Compressor A3 Feedback K_A3_FBK

HPS.A OFF/ON High Pressure Switch A HPSA

4-20

4-20 MA INPUTS

DMND xx.x 4-20 ma Demand Signal LMT_MA

RSET xx.x 4-20 ma Reset Signal RST_MA

CSP xx.x 4-20 ma Cooling Setpoint CSP_IN

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT

GEN.O

GENERAL OUTPUTS

C.LWP OFF/ON Cooler Pump Relay COOLPUMP

C.DWP OFF/ON Condenser Pump CONDPUMP

ALRM OFF/ON Alarm State ALM

CDWO OFF/ON Condenser Valve Open COND_WVO

CDWC OFF/ON Condenser Valve Close COND_WVC

CIR.A

OUTPUTS CIRCUIT A

CC.A1 OFF/ON Compressor A1 Relay K_A1_RLY

D.SOL OFF/ON Digital Scroll Solenoid DISCRSOL

CC.A2 OFF/ON Compressor A2 Relay K_A2_RLY

CC.A3 OFF/ON Compressor A3 Relay K_A3_RLY

CCH OFF/ON Crankcase Heater Relay CCH_RLY

LLSV OFF/ON Liquid Line Solenoid LLSV_A

MLV.R OFF/ON Minimum Load Valve Relay MLV_RLY

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Configuration Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

DISP

DISPLAY CONFIGURATION

TEST OFF/ON Test Display LEDs DISPTEST

METR OFF/ON Metric Display DISPUNIT Off = English On = Metric

LANG X Language Selection LANGUAGE

Default: 0

0 = English

1 = Espanol

2 = Francais

3 = Portuguese

PAS.E DSBL/ENBL Password Enable PASS_EBL

PASS XXXX Service Password PASSCOPY 0 to 9999

UNIT

UNIT CONFIGURATION

TYPE XUnit Type UNIT_TYP 2=Water Cooled, 3=Split

System

SIZE XXX Unit Size SIZE 10 to 100

SZA.1 XX Compressor A1 Size SIZE_A1

SZA.2 XX Compressor A2 Size SIZE_A2

SZA.3 XX Compressor A3 Size SIZE_A3

A1.TY NO/YES Compressor A1 Digital? CPA1TYPE

MAX.T XX Maximum A1 Unload Time MAXULTME 0 to 15

OPT1

UNIT OPTIONS 1 HARDWARE

FLUD X Cooler Fluid 1 = Water

2 = Medium Temperature

Brine

FLUIDTYP

MLV.S NO/YES Minimum Load Vlv Select MLV_FLG

RG.EN DSBL/ENBL Return Gas Sensor Enable RGT_ENA

OAT.E DSBL/ENBL Enable OAT Sensor OAT_ENA

D.G.EN DSBL/ENBL Dischrge Gas Temp Enable DISGASEN

CSB.E DSBL/ENBL CSB Boards Enable CSB_ENA

CPC OFF/ON Cooler Pump Control CPC

PM.DY XX MIN Cooler Pump Shutdown Dly PUMP_DLY 0 to 10

DPME XEnable Condenser Pump CONDPMPE 0 to 2

DFLS DSBL/ENBL Enable Cond Flow Switch CONDFLSW

CDWS DSBL/ENBL Enable Cond Wtr Sensors CONDWTRS

OPT2

UNIT OPTIONS 2 CONTROLS

CTRL X Control Method CONTROL 0=Switch, 1=Occupancy,

2=Occupancy, 3=CCN

LCWT XX High LCW Alert Limit LCW_LMT 2 to 60

DELY XX Minutes Off Time DELAY 0 to 15

ICE.M DSBL/ENBL Ice Mode Enable ICE_CNFG

CCN

CCN NETWORK CONFIGS

CCNA XXX CCN Address CCNADD 1 to 239

CCNB XXX CCN Bus Number CCNBUS 0 to 239

BAUD X CCN Baud Rate CCNBAUDD

1 = 2400

2 = 4800

3 = 9600

4 =19,200

5 =38,400

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Configuration Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

RSET

RESET COOL TEMP

CRST X Cooling Reset Type CRST_TYP

0 = No Reset

1 = 4 to 20 mA Input

2 = Outdoor Air Tempera-

ture

3 = Return Fluid

4 = Space Temperature

MA.DG XX.XΔF4-20 - Degrees Reset 420_DEG -30 to 30

RM.NO XXX.X °F Remote - No Reset Temp REM_NO 0 to125

RM.F XXX.X °F Remote - Full Reset Temp REM_FULL 0 to125

RM.DG XX.X °F Remote - Degrees Reset REM_DEG -30 to 30

RT.NO XXX.XΔFReturn - No Reset Temp RTN_NO 0 to 30

RT.F XXX.XΔFReturn - Full Reset Temp RTN_FULL 0 to 10

RT.DG XX.X °F Return - Degrees Reset RTN_DEG -30 to 30

DMDC X Demand Limit Select DMD_CTRL

0 = None

1 = Switch

2 - 4 to 20 mA Input

3 = CCN Loadshed

DM20 XXX% Demand Limit at 20 mA DMT20MA 0 to 100

SHNM XXX Loadshed Group Number SHED_NUM 0 to 99

SHDL XXX% Loadshed Demand Delta SHED_DEL 0 to 60

SHTM XXX Maximum Loadshed Time SHED_TIM 0 to 120

DLS1 XXX% Demand Limit Switch 1 DLSWSP1 0 to 100

DLS2 XXX% Demand Limit Switch 2 DLSWSP2 0 to 100

LLEN DSBL/ENBL Lead/Lag Chiller Enable LL_ENA

MSSL SLVE/MAST Master/Slave Select MS_SEL

SLVA XXX Slave Address SLV_ADDR 0 to 239

LLBL X Lead/Lag Balance Select LL_BAL

0 = Master Leads

1 = Slave Leads

2 = Automatic

LLBD XXX Lead/Lag Balance Delta LL_BAL_D 40 to 400 hours

LLDY XXX Lag Start Delay LL_DELAY 0 to 30 minutes

PAR A NO/YES Parallel Configuration PARALLEL

SLCT

SETPOINT AND RAMP LOAD

CLSP X Cooling Set Point Select CLSP_TYP

0 = Single

1 = Dual Switch

2 = Dual CCN Occupied

3 = 4 to 20 mA Input

RL.S DSBL/ENBL Ramp Load Select RAMP_EBL

CRMP X.X Cooling Ramp Loading CRAMP 0.2 to 2

SCHD XX Schedule Number SCHEDNUM 0 to 99

Z.GN X.X Deadband Multiplier Z_GAIN 1 to 4

SERV

SERVICE CONFIGURATION

EN.A1 DSBL/ENBL Enable Compressor A1 ENABLEA1

EN.A2 DSBL/ENBL Enable Compressor A2 ENABLEA2

EN.A3 DSBL/ENBL Enable Compressor A3 ENABLEA3

REV.R DSBL/ENBL Reverse Rotation Enable REVR_ENA

BCST

BROADCAST CONFIGURATION

T.D.BC OFF/ON CCN Time/Date Broadcast CCNBC

OAT.B OFF/ON CCN OAT Broadcast OATBC

G.S.BC OFF/ON Global Schedule Broadcst GSBC

BC.AK OFF/ON CCN Broadcast Ack'er CCNBCACK

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

TIME TIME OF DAY

HH.MM XX.XX Hour and Minute TIME

DATE

MONTH, DATE, DAY, AND YEAR

MNTH XX Month of Year MOY 1 to 12 (1 = January,

2 = February, etc.)

DOM XX Day of Month DOM 1 to 31

DAY X Day of Week DOWDISP 1 - 7 (1 = Sunday,

2 = Monday, etc.)

YEAR XXXX Year of Century YOCDISP 1999 to 2098

DST

DAYLIGHT SAVINGS TIME

STR.M XX Month STARTM Default: 4 Range 1 to 12

STR.W X Week STARTW Default: 1 Range 1 to 5

STR.D X Day STARTD Default: 7 Range 1 to 7

MIN.A XX Minutes to Add MINADD Default: 60 Range 0 to

STP.M XX Month STOPM Default: 10 Range 1 to

STP.W XX Week STOPW Default: 5 Range 1to 5

STP.D XX Day STOPD Default: 7 Range 1 to 7

MIN.S XX Minutes to Subtract MINSUB Default: 60 Range 0 to

HOL.L LOCAL HOLIDAY SCHEDULES

HD.01

HOLIDAY SCHEDULE 01

MON XX Holiday Start Month HOLMON01 0 to 12

DAY XX Start Day HOLDAY01 0 to 31

LEN XX Duration (days) HOLLEN01 0 to 99

HD.02

HOLIDAY SCHEDULE 02

MON XX Holiday Start Month HOLMON02 0 to 12

DAY XX Start Day HOLDAY02 0 to 31

LEN XX Duration (days) HOLLEN02 0 to 99

HD.03

HOLIDAY SCHEDULE 03

MON XX Holiday Start Month HOLMON03 0 to 12

DAY XX Start Day HOLDAY03 0 to 31

LEN XX Duration (days) HOLLEN03 0 to 99

HD.04

HOLIDAY SCHEDULE 04

MON XX Holiday Start Month HOLMON04 0 to 12

DAY XX Start Day HOLDAY04 0 to 31

LEN XX Duration (days) HOLLEN04 0 to 99

HD.05

HOLIDAY SCHEDULE 05

MON XX Holiday Start Month HOLMON05 0 to 12

DAY XX Start Day HOLDAY05 0 to 31

LEN XX Duration (days) HOLLEN05 0 to 99

HD.06

HOLIDAY SCHEDULE 06

MON XX Holiday Start Month HOLMON06 0 to 12

DAY XX Start Day HOLDAY06 0 to 31

LEN XX Duration (days) HOLLEN06 0 to 99

HD.07

HOLIDAY SCHEDULE 07

MON XX Holiday Start Month HOLMON07 0 to 12

DAY XX Start Day HOLDAY07 0 to 31

LEN XX Duration (days) HOLLEN07 0 to 99

HD.08

HOLIDAY SCHEDULE 08

MON XX Holiday Start Month HOLMON08 0 to 12

DAY XX Start Day HOLDAY08 0 to 31

LEN XX Duration (days) HOLLEN08 0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

HD.09

HOLIDAY SCHEDULE 09

MON XX Holiday Start Month HOLMON09 0 to 12

DAY XX Start Day HOLDAY09 0 to 31

LEN XX Duration (days) HOLLEN09 0 to 99

HD.10

HOLIDAY SCHEDULE 10

MON XX Holiday Start Month HOLMON10 0 to 12

DAY XX Start Day HOLDAY10 0 to 31

LEN XX Duration (days) HOLLEN10 0 to 99

HD.11

HOLIDAY SCHEDULE 11

MON XX Holiday Start Month HOLMON11 0 to 12

DAY XX Start Day HOLDAY11 0 to 31

LEN XX Duration (days) HOLLEN11 0 to 99

HD.12

HOLIDAY SCHEDULE 12

MON XX Holiday Start Month HOLMON12 0 to 12

DAY XX Start Day HOLDAY12 0 to 31

LEN XX Duration (days) HOLLEN12 0 to 99

HD.13

HOLIDAY SCHEDULE 13

MON XX Holiday Start Month HOLMON13 0 to 12

DAY XX Start Day HOLDAY13 0 to 31

LEN XX Duration (days) HOLLEN13 0 to 99

HD.14

HOLIDAY SCHEDULE 14

MON XX Holiday Start Month HOLMON14 0 to 12

DAY XX Start Day HOLDAY14 0 to 31

LEN XX Duration (days) HOLLEN14 0 to 99

HD.15

HOLIDAY SCHEDULE 15

MON XX Holiday Start Month HOLMON15 0 to 12

DAY XX Start Day HOLDAY15 0 to 31

LEN XX Duration (days) HOLLEN15 0 to 99

HD.16

HOLIDAY SCHEDULE 16

MON XX Holiday Start Month HOLMON16 0 to 12

DAY XX Start Day HOLDAY16 0 to 31

LEN XX Duration (days) HOLLEN16 0 to 99

HD.17

HOLIDAY SCHEDULE 17

MON XX Holiday Start Month HOLMON17 0 to 12

DAY XX Start Day HOLDAY17 0 to 31

LEN XX Duration (days) HOLLEN17 0 to 99

HD.18

HOLIDAY SCHEDULE 18

MON XX Holiday Start Month HOLMON18 0 to 12

DAY XX Start Day HOLDAY18 0 to 31

LEN XX Duration (days) HOLLEN18 0 to 99

HD.19

HOLIDAY SCHEDULE 19

MON XX Holiday Start Month HOLMON19 0 to 12

DAY XX Start Day HOLDAY19 0 to 31

LEN XX Duration (days) HOLLEN19 0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

HD.20

HOLIDAY SCHEDULE 20

MON XX Holiday Start Month HOLMON20 0 to 12

DAY XX Start Day HOLDAY20 0 to 31

LEN XX Duration (days) HOLLEN20 0 to 99

HD.21

HOLIDAY SCHEDULE 21

MON XX Holiday Start Month HOLMON21 0 to 12

DAY XX Start Day HOLDAY21 0 to 31

LEN XX Duration (days) HOLLEN21 0 to 99

HD.22

HOLIDAY SCHEDULE 22

MON XX Holiday Start Month HOLMON22 0 to 12

DAY XX Start Day HOLDAY22 0 to 31

LEN XX Duration (days) HOLLEN22 0 to 99

HD.23

HOLIDAY SCHEDULE 23

MON XX Holiday Start Month HOLMON23 0 to 12

DAY XX Start Day HOLDAY23 0 to 31

LEN XX Duration (days) HOLLEN23 0 to 99

HD.24

HOLIDAY SCHEDULE 24

MON XX Holiday Start Month HOLMON24 0 to 12

DAY XX Start Day HOLDAY24 0 to 31

LEN XX Duration (days) HOLLEN24 0 to 99

HD.25

HOLIDAY SCHEDULE 25

MON XX Holiday Start Month HOLMON25 0 to 12

DAY XX Start Day HOLDAY25 0 to 31

LEN XX Duration (days) HOLLEN25 0 to 99

HD.26

HOLIDAY SCHEDULE 26

MON XX Holiday Start Month HOLMON26 0 to 12

DAY XX Start Day HOLDAY26 0 to 31

LEN XX Duration (days) HOLLEN26 0 to 99

HD.27

HOLIDAY SCHEDULE 27

MON XX Holiday Start Month HOLMON27 0 to 12

DAY XX Start Day HOLDAY27 0 to 31

LEN XX Duration (days) HOLLEN27 0 to 99

HD.28

HOLIDAY SCHEDULE 28

MON XX Holiday Start Month HOLMON28 0 to 12

DAY XX Start Day HOLDAY28 0 to 31

LEN XX Duration (days) HOLLEN28 0 to 99

HD.29

HOLIDAY SCHEDULE 29

MON XX Holiday Start Month HOLMON29 0 to 12

DAY XX Start Day HOLDAY29 0 to 31

LEN XX Duration (days) HOLLEN29 0 to 99

HD.30

HOLIDAY SCHEDULE 30

MON XX Holiday Start Month HOLMON30 0 to 12

DAY XX Start Day HOLDAY30 0 to 31

LEN XX Duration (days) HOLLEN30 0 to 99

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

SCH.N Schedule Number 0 SCHEDNUM 0 to 99

SCH.L LOCAL OCCUPANCY SCHEDULE

PER.1

OCCUPANCY PERIOD 1

OCC.1 XX:XX Period Occupied Time PER1OCC

UNC.1 XX:XX Period Unoccupied

Time PER1UNC

MON.1 NO/YES Monday In Period PER1MON

TUE.1 NO/YES Tuesday In Period PER1TUE

WED.1 NO/YES Wednesday In Period PER1WED

THU.1 NO/YES Thursday In Period PER1THU

FRI.1 NO/YES Friday In Period PER1FRI

SAT.1 NO/YES Saturday In Period PER1SAT

SUN.1 NO/YES Sunday In Period PER1SUN

HOL.1 NO/YES Holiday In Period PER1HOL

PER.2

OCCUPANCY PERIOD 2

OCC.2 XX:XX Period Occupied Time PER2OCC

UNC.2 XX:XX Period Unoccupied

Time PER2UNC

MON.2 NO/YES Monday In Period PER2MON

TUE.2 NO/YES Tuesday In Period PER2TUE

WED.2 NO/YES Wednesday In Period PER2WED

THU.2 NO/YES Thursday In Period PER2THU

FRI.2 NO/YES Friday In Period PER2FRI

SAT.2 NO/YES Saturday In Period PER2SAT

SUN.2 NO/YES Sunday In Period PER2SUN

HOL.2 NO/YES Holiday In Period PER2HOL

PER.3

OCCUPANCY PERIOD 3

OCC.3 XX:XX Period Occupied Time PER3OCC

UNC.3 XX:XX Period Unoccupied

Time PER3UNC

MON.3 NO/YES Monday In Period PER3MON

TUE.3 NO/YES Tuesday In Period PER3TUE

WED.3 NO/YES Wednesday In Period PER3WED

THU.3 NO/YES Thursday In Period PER3THU

FRI.3 NO/YES Friday In Period PER3FRI

SAT.3 NO/YES Saturday In Period PER3SAT

SUN.3 NO/YES Sunday In Period PER3SUN

HOL.3 NO/YES Holiday In Period PER3HOL

PER.4

OCCUPANCY PERIOD 4

OCC.4 XX:XX Period Occupied Time PER4OCC

UNC.4 XX:XX Period Unoccupied

Time PER4UNC

MON.4 NO/YES Monday In Period PER4MON

TUE.4 NO/YES Tuesday In Period PER4TUE

WED.4 NO/YES Wednesday In Period PER4WED

THU.4 NO/YES Thursday In Period PER4THU

FRI.4 NO/YES Friday In Period PER4FRI

SAT.4 NO/YES Saturday In Period PER4SAT

SUN.4 NO/YES Sunday In Period PER4SUN

HOL.4 NO/YES Holiday In Period PER4HOL

PER.5

OCCUPANCY PERIOD 5

OCC.5 XX:XX Period Occupied Time PER5OCC

UNC.5 XX:XX Period Unoccupied

Time PER5UNC

MON.5 NO/YES Monday In Period PER5MON

TUE.5 NO/YES Tuesday In Period PER5TUE

WED.5 NO/YES Wednesday In Period PER5WED

THU.5 NO/YES Thursday In Period PER5THU

FRI.5 NO/YES Friday In Period PER5FRI

SAT.5 NO/YES Saturday In Period PER5SAT

SUN.5 NO/YES Sunday In Period PER5SUN

HOL.5 NO/YES Holiday In Period PER5HOL

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

PER.6

OCCUPANCY PERIOD 6

OCC.6 XX:XX Period Occupied Time PER6OCC

UNC.6 XX:XX Period Unoccupied

Time PER6UNC

MON.6 NO/YES Monday In Period PER6MON

TUE.6 NO/YES Tuesday In Period PER6TUE

WED.6 NO/YES Wednesday In Period PER6WED

THU.6 NO/YES Thursday In Period PER6THU

FRI.6 NO/YES Friday In Period PER6FRI

SAT.6 NO/YES Saturday In Period PER6SAT

SUN.6 NO/YES Sunday In Period PER6SUN

HOL.6 NO/YES Holiday In Period PER6HOL

PER.7

OCCUPANCY PERIOD 7

OCC.7 XX:XX Period Occupied Time PER7OCC

UNC.7 XX:XX Period Unoccupied

Time PER7UNC

MON.7 NO/YES Monday In Period PER7MON

TUE.7 NO/YES Tuesday In Period PER7TUE

WED.7 NO/YES Wednesday In Period PER7WED

THU.7 NO/YES Thursday In Period PER7THU

FRI.7 NO/YES Friday In Period PER7FRI

SAT.7 NO/YES Saturday In Period PER7SAT

SUN.7 NO/YES Sunday In Period PER7SUN

HOL.7 NO/YES Holiday In Period PER7HOL

PER.8

OCCUPANCY PERIOD 8

OCC.8 XX:XX Period Occupied Time PER8OCC

UNC.8 XX:XX Period Unoccupied

Time PER8UNC

MON.8 NO/YES Monday In Period PER8MON

TUE.8 NO/YES Tuesday In Period PER8TUE

WED.8 NO/YES Wednesday In Period PER8WED

THU.8 NO/YES Thursday In Period PER8THU

FRI.8 NO/YES Friday In Period PER8FRI

SAT.8 NO/YES Saturday In Period PER8SAT

SUN.8 NO/YES Sunday In Period PER8SUN

HOL.8 NO/YES Holiday In Period PER8HOL

OVR

SCHEDULE OVERRIDE

OVR.T X Timed Override Hours OVR_EXT 0 to 4 hours

OVR.L X Override Time Limit OTL 0 to 4 hours

T.OVR NO/YES Timed Override TIMEOVER

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Operating Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

MODE

MODES CONTROLLING UNIT

MD01 OFF/ON FSM controlling Chiller MODE_1

MD02 OFF/ON WSM controlling Chiller MODE_2

MD03 OFF/ON Master/Slave control MODE_3

MD05 OFF/ON Ramp Load Limited MODE_5

MD06 OFF/ON Timed Override in effect MODE_6

MD07 OFF/ON Low Cooler Suction TempA MODE_7

MD09 OFF/ON Slow Change Override MODE_9

MD10 OFF/ON Minimum OFF time active MODE_10

MD13 OFF/ON Dual Setpoint MODE_13

MD14 OFF/ON Temperature Reset MODE_14

MD15 OFF/ON Demand Limited MODE_15

MD16 OFF/ON Cooler Freeze Protection MODE_16

MD17 OFF/ON Low Temperature Cooling MODE_17

MD18 OFF/ON High Temperature Cooling MODE_18

MD19 OFF/ON Making ICE MODE_19

MD20 OFF/ON Storing ICE MODE_20

MD21 OFF/ON High SCT Circuit A MODE_21

MD23 OFF/ON Minimum Comp. On Time MODE_23

MD24 OFF/ON Pump Off Delay Time MODE_24

APPENDIX A — LOCAL DISPLAY TABLES (cont)

Alarms Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION CCN POINT COMMENT

CRNT

CURRENTLY ACTIVE ALARMS

AA01

AA02

AA03

AA04

AA05

AA06

AA07

AA08

AA09

AA10

AA11

AA12

AA13

AA14

AA15

AA16

AA17

AA18

AA19

AA20

AA21

AA22

AA23

AA24

AA25

AXXX

TXXX

PXXX

Current Alarms 1-25

Alarms are shown as

AXXX

Alerts are shown as TXXX

RCRN NO/YES Reset All Current Alarms ALRESET

HIST

ALARM HISTORY

AL01

AL02

AL03

AL04

AL05

AL06

AL07

AL08

AL09

AL10

AL11

AL12

AL13

AL14

AL15

AL16

AL17

AL18

AL19

AL20

AXXX

TXXX

PXXX

Alarm History 1-20

Alarms are shown as

AXXX

Alerts are shown as TXXX

APPENDIX B — CCN TABLES

CCN DISPLAY TABLES — A_UNIT (General Unit Parameters

CCN DISPLAY TABLES — CIRCA_AN (Circuit A Analog Parameters)

CCN DISPLAY TABLES — CIRCADIO (Circuit A Discrete Inputs/Outputs)

DESCRIPTION VALUE UNITS POINT NAME FORCIBLE

Control Mode 10-char ASCII STAT N

Occupied No/Yes OCC N

CCN Chiller Stop/Start CHIL_S_S Y

Alarm State 6-char ASCII ALM N

Active Demand Limit NNN % DEM_LIM Y

Override Modes in Effect No/Yes MODE N

Percent Total Capacity NNN % CAP_T N

Requested Stage NN STAGE N

Active Setpoint NNN.n degF SP N

Control Point NNN.n degF CTRL_PNT Y

Entering Fluid Temp NNN.n degF EWT N

Leaving Fluid Temp NNN.n degF LWT N

Emergency Stop Enable/EMStop EMSTOP Y

Minutes Left for Start 5-char ASCII MIN_LEFT N

PUMPS

Cooler Pump Relay Off/On COOLPUMP N

Condenser Pump Off/On CONDPUMP N

Cooler Flow Switch Off/On COOLFLOW N

DESCRIPTION VALUE UNITS POINT NAME FORCIBLE

CIRCUIT A ANALOG VALUES

Percent Total Capacity NNN % CAPA_T N

Percent Available Cap. NNN % CAPA_A N

Discharge Pressure NNN.n PSIG DP_A N

Suction Pressure NNN.n PSIG SP_A N

Head Setpoint NNN.n degF HSP N

Saturated Condensing Tmp NNN.n degF TMP_SCTA N

Saturated Suction Temp NNN.n degF TMP_SSTA N

Compr Return Gas Temp NNN.n degF TMP_RGTA N

Discharge Gas Temp NNN.n degF DISGAS N

Suction Superheat Temp NNN.n deltaF SH_A N

DESCRIPTION VALUE UNITS POINT NAME FORCIBLE

CIRC. A DISCRETE OUTPUTS

Compressor A1 Relay Off/On K_A1_RLY N

Compressor A2 Relay Off/On K_A2_RLY N

Compressor A3 Relay Off/On K_A3_RLY

Minimum Load Valve Relay Off/On MLV_RLY N

CIRC. A DISCRETE INPUTS

Compressor A1 Feedback Off/On K_A1_FBK N

Compressor A2 Feedback Off/On K_A2_FBK N

Compressor A3 Feedback Off/On K_A3_FBK

APPENDIX B — CCN TABLES (cont)

CCN DISPLAY TABLES — OPTIONS (Unit Parameters)

CCN MAINTENANCE TABLES — STRTHOUR

DESCRIPTION VALUE UNITS POINT NAME FORCIBLE

UNIT ANALOG VALUES

Cooler Entering Fluid NNN.n degF COOL_EWT N

Cooler Leaving Fluid NNN.n degF COOL_LWT N

Condenser Entering Fluid NNN.n degF COND_EWT N

Condenser Leaving Fluid NNN.n degF COND_LWT N

Lead/Lag Leaving Fluid NNN.n degF DUAL_LWT N

TEMPERATURE RESET

4-20 ma Reset Signal NN.n milliAmps RST_MA N

Outside Air Temperature NNN.n degF OAT Y

Space Temperature NNN.n degF SPT Y

DEMAND LIMIT

4-20 ma Demand Signal NN.n milliAmps LMT_MA N

Demand Limit Switch 1 Off/On DMD_SW1 N

Demand Limit Switch 2 Off/On DMD_SW2 N

CCN Loadshed Signal N DL_STAT N

MISCELLANEOUS

Dual Setpoint Switch Off/On DUAL_IN N

Cooler LWT Setpoint NNN.n degF LWT_SP N

Ice Done Off/On ICE_DONE N

DESCRIPTION VALUE UNITS POINT NAME

Machine Operating Hours NNNNNN hours HR_MACH

Machine Starts NNNNNN CY_MACH

Compressor A1 Run Hours NNNNNN.n hours HR_A1

Compressor A2 Run Hours NNNNNN.n hours HR_A2

Compressor A3 Run Hours NNNNNN.n hours HR_A3

Compressor A1 Starts NNNNNN CY_A1

Compressor A2 Starts NNNNNN CY_A2

Compressor A3 Starts NNNNNN CY_A3

PUMP HOURS

Cooler Pump Run Hours NNNNNN.n hours HR_CPUMP

Condenser Pump Run Hours NNNNNN.n hours HR_DPUMP

APPENDIX B — CCN TABLES (cont)

CCN MAINTENANCE TABLES — CURRMODS

CCN MAINTENANCE TABLES — ALARMS

CCN MAINTENANCE TABLES — VERSIONS

DESCRIPTION VALUE POINT NAME

CSM controlling Chiller Off/On MODE_1

WSM controlling Chiller Off/On MODE_2

Master/Slave control Off/On MODE_3

Ramp Load Limited Off/On MODE_5

Timed Override in effect Off/On MODE_6

Low Cooler Suction TempA Off/On MODE_7

Slow Change Override Off/On MODE_9

Minimum OFF time active Off/On MODE_10

Dual Setpoint Off/On MODE_13

Temperature Reset Off/On MODE_14

Demand Limited Off/On MODE_15

Cooler Freeze Protection Off/On MODE_16

Low Temperature Cooling Off/On MODE_17

High Temperature Cooling Off/On MODE_18

Making ICE Off/On MODE_19

Storing ICE Off/On MODE_20

High SCT Circuit A Off/On MODE_21

Minimum Comp. On Time Off/On MODE_23

Pump Off Delay Time Off/On MODE_24

Low Sound Mode Off/On MODE_25

DESCRIPTION VALUE POINT NAME

Active Alarm #1 4-char ASCII ALARM01C

Active Alarm #2 4-char ASCII ALARM02C

Active Alarm #3 4-char ASCII ALARM03C

Active Alarm #4 4-char ASCII ALARM04C

Active Alarm #5 4-char ASCII ALARM05C

Active Alarm #6 4-char ASCII ALARM06C

Active Alarm #7 4-char ASCII ALARM07C

Active Alarm #8 4-char ASCII ALARM08C

Active Alarm #9 4-char ASCII ALARM09C

Active Alarm #10 4-char ASCII ALARM10C

Active Alarm #11 4-char ASCII ALARM11C

Active Alarm #12 4-char ASCII ALARM12C

Active Alarm #13 4-char ASCII ALARM13C

Active Alarm #14 4-char ASCII ALARM14C

Active Alarm #15 4-char ASCII ALARM15C

Active Alarm #16 4-char ASCII ALARM16C

Active Alarm #17 4-char ASCII ALARM17C

Active Alarm #18 4-char ASCII ALARM18C

Active Alarm #19 4-char ASCII ALARM19C

Active Alarm #20 4-char ASCII ALARM20C

Active Alarm #21 4-char ASCII ALARM21C

Active Alarm #22 4-char ASCII ALARM22C

Active Alarm #23 4-char ASCII ALARM23C

Active Alarm #24 4-char ASCII ALARM24C

Active Alarm #25 4-char ASCII ALARM25C

DESCRIPTION VERSION VALUE

AUX CESR131333- 5-char ASCII

MBB CESR131279- 5-char ASCII

EMM CESR131174- 5-char ASCII

MARQUEE CESR131171- 5-char ASCII

NAVIGATOR CESR130227- 5-char ASCII

APPENDIX B — CCN TABLES (cont)

CCN MAINTENANCE TABLES — LOADFACT

CCN MAINTENANCE TABLES — LEARNFNS

CCN MAINTENANCE TABLES — PM-STRN

CCN MAINTENANCE TABLES — TESTMODE

DESCRIPTION VALUE UNITS POINT NAME

CAPACITY CONTROL

Load/Unload Factor NNN SMZ

Control Point NNN.n degF CTRL_PNT

Entering Fluid Temp NNN.n degF EWT

Leaving Fluid Temp NNN.n degF LWT

Ramp Load Limited Off/On MODE_5

Slow Change Override Off/On MODE_9

Cooler Freeze Protection Off/On MODE_16

Low Temperature Cooling Off/On MODE_17

High Temperature Cooling Off/On MODE_18

Minimum Comp. On Time Off/On MODE_23

DESCRIPTION VALUE UNITS POINT NAME

SCT Delta for Comp A1 NNN.n deltaF A1SCTDT

SCT Delta for Comp A2 NNN.n deltaF A2SCTDT

SCT Delta for Comp A3 NNN.n deltaF A3SCTDT

SAGP for Compressor A1 NNN.n SAGA1P

SAGM for Compressor A1 NNN.n SAGA1M

SAGP for Compressor A2 NNN.n SAGA2P

SAGM for Compressor A2 NNN.n SAGA2M

SAGP for Compressor A3 NNN.n SAGA3P

SAGM for Compressor A3 NNN.n SAGA3M

Reset short loop gain Yes/No RESET_GN

DESCRIPTION VALUE UNITS POINT NAME

Strainer Srvc Interval NNNNN hours SI_STRNR

Strainer Srvc Countdown NNNNN hours ST_CDOWN

Strainer Maint. Done No/Yes ST_MAINT

Strainer Maint. Date 15-char ASCII STRN_PM0

Strainer Maint. Date 15-char ASCII STRN_PM1

Strainer Maint. Date 15-char ASCII STRN_PM2

Strainer Maint. Date 15-char ASCII STRN_PM3

Strainer Maint. Date 15-char ASCII STRN_PM4

DESCRIPTION VALUE UNITS POINT NAME

Service Test Mode Off/On NET_CTRL

Compressor A1 Relay Off/On S_A1_RLY

Compressor A2 Relay Off/On S_A2_RLY

Compressor A3 Relay Off/On S_A3_RLY

Cooler Pump Relay Off/On S_CLPMP

Condenser Pump Off/On S_CNDPMP

Comp A1 Unload Time NN secs S_A1ULTM

Remote Alarm Relay Off/On S_ALM

APPENDIX B — CCN TABLES (cont)

CCN MAINTENANCE TABLES — RUNTEST

CCN MAINTENANCE TABLES — DUALCHIL

DESCRIPTION VALUE UNITS POINT NAME

Percent Total Capacity NNN % CAPA_T

Percent Available Cap. NNN % CAPA_A

Discharge Pressure NNN.n PSIG DP_A

Suction Pressure NNN.n PSIG SP_A

Saturated Condensing Tmp NNN.n degF TMP_SCTA

Saturated Suction Temp NNN.n degF TMP_SSTA

Compr Return Gas Temp NNN.n degF TMP_RGTA

Discharge Gas Temp NNN.n degF DISGAS

Suction Superheat Temp NNN.n deltaF SH_A

Compressor A1 Relay Off/On K_A1_RLY

Compressor A2 Relay Off/On K_A2_RLY

Compressor A3 Relay Off/On K_A3_RLY

Minimum Load Valve Relay Off/On MLV_RLY

Compressor A1 Feedback Off/On K_A1_FBK

Compressor A2 Feedback Off/On K_A2_FBK

Compressor A3 Feedback Off/On K_A3_FBK

Outside Air Temperature NNN.n degF OAT

Space Temperature NNN.n degF SPT

Cooler Pump Relay Off/On COOLPUMP

Condenser Pump Off/On CONDPUMP

Cooler Entering Fluid NNN.n degF COOL_EWT

Cooler Leaving Fluid NNN.n degF COOL_LWT

Cooler Flow Switch Off/On COOLFLOW

DESCRIPTION VALUE UNITS POINT NAME

Dual Chiller Link Good? No/Yes DC_LINK

Master Chiller Role 12-char ASCII MC_ROLE

Slave Chiller Role 12-char ASCII SC_ROLE

Lead Chiller Ctrl Point NNN.n degF LEAD_CP

Lag Chiller Ctrl Point NNN.n degF LAG_CP

Control Point NNN.n degF CTRL_PNT

Cool EnteringFluid-Slave NNN.n degF COOLEWTS

Cool Leaving Fluid-Slave NNN.n degF COOLLWTS

Cooler Entering Fluid NNN.n degF COOL_EWT

Cooler Leaving Fluid NNN.n degF COOL_LWT

Lead/Lag Leaving Fluid NNN.n degF DUAL_LWT

Percent Avail.Capacity NNN % CAP_A

Percent Avail.Cap.Slave NNN % CAP_A_S

Lag Start Delay Time 5-char ASCII LAGDELAY

Load/Unload Factor NNN SMZ

Load/Unload Factor-Slave NNNN SMZSLAVE

Lead SMZ Clear Commanded No/Yes LEADSMZC

Lag SMZ Clear Commanded No/Yes LAG_SMZC

Lag Commanded Off? No/Yes LAG_OFF

Dual Chill Lead CapLimit NNN.n % DCLDCAPL

Dual Chill Lag CapLimit NNN.n % DCLGCAPL

APPENDIX B — CCN TABLES (cont)

CCN CONFIGURATION TABLES — UNIT (Unit Configuration)

CCN CONFIGURATION TABLES — OPTIONS1 (Options 1 Configuration)

CCN CONFIGURATION TABLES — OPTIONS2 (Options 2 Configuration)

CCN CONFIGURATION TABLES — SCHEDOVR (Timed Override Setup)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

Unit Type N UNIT_TYP

Unit Size NNN tons SIZE

Compressor A1 Size NNN tons SIZE_A1

Compressor A2 Size NNN tons SIZE_A2

Compressor A3 Size NNN tons SIZE_A3

Suction Superheat Setpt NN.n deltaF SH_SP

Compressor A1 Digital? No/Yes CPA1TYPE

Maximum A1 Unload Time NN secs MAXULTME

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

Cooler Fluid N FLUIDTYP

Minimum Load Vlv Select No/Yes MLV_FLG

Return Gas Sensor Enable Dsable/Enable RGT_ENA

Enable OAT Sensor Dsable/Enable OAT_ENA

Dischrge Gas Temp Enable Dsable/Enable DISGASEN

CSB Boards Enable Dsable/Enable CSB_ENA

Reverse Rotation Enable Dsable/Enable REVR_ENA

Cooler Pump Control Off/On CPC

Cooler Pump Shutdown Dly NN mins PUMP_DLY

EMM Module Installed No/Yes EMM_BRD

Enable Condenser Pump N CONDPMPE

Enable Cond Wtr Sensors Dsable/Enable CONDWTRS

Enable Cond Flow Switch Dsable/Enable CONDFLSW

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

Control Method N CONTROL

Loading Sequence Select N SEQ_TYPE

Lead/Lag Circuit Select N LEAD_TYP

Cooling Setpoint Select N CLSP_TYP

Ramp Load Select Dsable/Enable RAMP_EBL

High LCW Alert Limit NN.n deltaF LCW_LMT

Minutes off time NN mins DELAY

Deadband Multiplier N.n Z_GAIN

Ice Mode Enable Dsable/Enable ICE_CNFG

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

Schedule Number NN 1 SCHEDNUM

Override Time Limit N 0 hours OTL

Timed Override Hours N 0 hours OVR_EXT

Timed Override No/Yes No TIMEOVER

APPENDIX B — CCN TABLES (cont)

CCN CONFIGURATION TABLES — RESETCON (Temperature Reset and Demand Limit)

CCN CONFIGURATION TABLES — DUALCHIL (Dual Chiller Configuration Settings)

CCN CONFIGURATION TABLES — DISPLAY (Marquee Display SETUP)

CCN CONFIGURATION TABLES — HPA

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

COOLING RESET

Cooling Reset Type N 0 CRST_TYP

4-20 MA RESET

4-20 - Degrees Reset NNN.n deltaF 420_DEG

REMOTE RESET

Remote - No Reset Temp NNN.n degF REM_NO

Remote - Full Reset Temp NNN.n degF REM_FULL

Remote - Degrees Reset NNN.n deltaF REM_DEG

RETURN TEMPERATURE RESET

Return - No Reset Temp NNN.n deltaF RTN_NO

Return - Full Reset Temp NNN.n deltaF RTN_FULL

Return - Degrees Reset NNN.n deltaF RTN_DEG

DEMAND LIMIT

Demand Limit Select N DMD_CTRL

Demand Limit at 20 mA NNN % DMT20MA

Loadshed Group Number NN SHED_NUM

Loadshed Demand Delta NN % SHED_DEL

Maximum Loadshed Time NNN mins SHED_TIM

Demand Limit Switch 1 NNN % DLSWSP1

Demand Limit Switch 2 NNN % DLSWSP2

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

LEAD/LAG

Lead/Lag Chiller Enable Dsable/Enable LL_ENA

Master/Slave Select Master/Slave MS_SEL

Slave Address NNN SLV_ADDR

Lead/Lag Balance Select N LL_BAL

Lead/Lag Balance Delta NNN hours LL_BAL_D

Lag Start Delay NN mins LL_DELAY

Parallel Configuration No/Yes PA R A L L E L

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

Service Password NNNN PASSWORD

Password Enable Dsable/Enable PASS_EBL

Metric Display Off/On DISPUNIT

Language Selection N LANGUAGE

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

SCT Delta for Comp A1 NNN.n deltaF A1SCTDT

SCT Delta for Comp A2 NNN.n deltaF A2SCTDT

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300053-01 Printed in U.S.A. Form 30MP-1T Pg 72 1-10 Replaces: New

APPENDIX B — CCN TABLES (cont)

CCN SERVICE TABLES — SERVICE

CCN SETPOINT TABLES — SETPOINT

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

SERVICE

Brine Freeze Point NNN.n degF BRN_FRZ

COMPRESSOR ENABLE

Enable Compressor A1 Dsable/Enable ENABLEA1

Enable Compressor A2 Dsable/Enable ENABLEA2

Enable Compressor A3 Dsable/Enable ENABLEA3

DESCRIPTION VALUE DEFAULT UNITS POINT NAME

COOLING

Cooling Setpoint 1 NNN.n degF CSP1

Cooling Setpoint 2 NNN.n degF CSP2

ICE Setpoint NNN.n degF CSP3

RAMP LOADING

Cooling Ramp Loading N.n CRAMP

Brine Freeze Point NNN.n degF BRN_FRZ

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300053-01 Printed in U.S.A. Form 30MP-1T Pg CL-1 1-10 Replaces: New

START-UP CHECKLIST FOR 30MP LIQUID CHILLER

(Remove and use for job file.)

A. Preliminary Information

JOB NAME _______________________________________________________________________________

LOCATION _______________________________________________________________________________

INSTALLING CONTRACTOR _________________________________________________________________

DISTRIBUTOR ____________________________________________________________________________

START-UP PERFORMED BY _________________________________________________________________

EQUIPMENT: Chiller: MODEL NO. SERIAL NO.

COMPRESSORS:

B. Preliminary Equipment Check (Yes or No)

IS THERE ANY SHIPPING DAMAGE? IF SO, WHERE

_________________________________________________________________________________________

WILL THIS DAMAGE PREVENT UNIT START-UP?

CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT?

HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (refer to Installation Instructions)

ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (refer to Installation Instructions)

HAS THE GROUND WIRE BEEN CONNECTED?

ARE ALL ELECTRICAL TERMINALS TIGHT?

ON BRINE UNITS, HAS THE COOLER FLUID BEEN PROPERLY PROTECTED FROM FREEZING TO AT

LEAST 15° F (8.3° C) BELOW THE LOWEST ANTICIPATED LEAVING FLUID TEMPERATURE SET POINT?

HAVE THE MAIN BASE BOARD, ENERGY MANAGEMENT MODULE (OPTION) AND CONTROL RELAY

CONNECTIONS BEEN CHECK FOR TIGHTNESS?

CIRCUIT A

MODEL NO.

SERIAL NO.

CL-2

C. Unit Start-Up (insert check mark as each item is completed)

CHILLER HAS BEEN PROPERLY INTERLOCKED WITH THE AUXILIARY CONTACTS OF THE CHILLED

FLUID PUMP STARTER.

CHILLER HAS BEEN PROPERLY INTERLOCKED WITH THE AUXILIARY CONTACTS OF THE

CONDENSER WATER PUMP STARTER.

CRANKCASE HEATERS HAVE BEEN ENERGIZED FOR A MINIMUM OF 24 HOURS PRIOR TO START-UP.

(30MPA UNITS ONLY)

COMPRESSOR OIL LEVEL IS CORRECT.

LIQUID LINE SERVICE VALVE IS BACKSEATED (30MPA UNITS ONLY).

SET POINT SHOULD BE ADJUSTED TO THE DESIRED COOLER LEAVING FLUID TEMPERATURE.

(refer to installation instructions).

LEAK CHECK THOROUGHLY: CHECK ALL COMPRESSORS, CONDENSER MANIFOLDS AND HEADERS,

TXVs, SOLENOID VALVES, FILTER DRIERS, FUSIBLE PLUGS, THERMISTORS, AND COOLER CONNEC-

TIONS USING ELECTRONIC LEAK DETECTOR.

LOCATE, REPAIR, AND REPORT ANY REFRIGERANT LEAKS.

CHECK VOLTAGE IMBALANCE: AB AC BC

AB + AC + BC (divided by 3) = AVERAGE VOLTAGE = V

MAXIMUM DEVIATION FROM AVERAGE VOLTAGE =

IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START CHILLER!

CALL LOCAL POWER COMPANY FOR ASSISTANCE.

INCOMING POWER VOLTAGE TO CHILLER MODULES IS WITHIN RATED UNIT VOLTAGE

RANGE.

SYSTEM FLUID VOLUME IN LOOP: GAL (L)

REFER TO INSTALLATION INSTRUCTIONS FOR MINIMUM FLUID VOLUME

VOLTAGE IMBALANCE = (MAX. DEVIATION) x 100 = % VOLTAGE IMBALANCE

AVERAGE VOLTAGE

CL-3

C. Unit Start-Up (cont)

CHECK PRESSURE DROP ACROSS COOLER.

FLUID ENTERING COOLER: PSIG (kPa)

FLUID LEAVING COOLER: PSIG (kPa)

(PSIG DIFFERENCE) x 2.31 = FT OF FLUID PRESSURE DROP =

PLOT COOLER PRESSURE DROP ON PERFORMANCE DATA CHART (LOCATED IN INSTALLATION

INSTRUCTIONS LITERATURE) TO DETERMINE TOTAL GPM (L/s).

TOTAL GPM (L/s) = UNIT’S RATED MIN GPM (L/s) =

JOB’S SPECIFIED GPM (L/s) (if available):

NOTE: IF UNIT HAS LOW FLUID FLOW, FIND SOURCE OF PROBLEM: CHECK FLUID PIPING, IN-LINE

FLUID STRAINER, SHUT-OFF VALVES, CWP ROTATION, ETC.

COOLER LOOP FREEZE PROTECTION IF REQUIRED:

GALLONS (LITERS) ADDED:

PIPING INCLUDES ELECTRIC TAPE HEATERS IF PIPNG IS EXPOSED TO TEMPERATURES

BELOW FREEZING (Y/N):

COOLER/CONDENSER PROTECTION:

IN-LINE MINIMUM 40-MESH STRAINER INSTALLED WITHIN 10 FT OF THE COOLER/CONDENSER

WATER INLET.

COOLER: YES NO

CONDENSER: YES NO

VISUALLY CHECK MAIN BASE BOARD FOR THE FOLLOWING:

INSPECT ALL THERMISTORS AND TRANSDUCERS FOR POSSIBLE CROSSED WIRES.

CHECK TO BE SURE ALL WELL-TYPE THERMISTORS ARE FULLY INSERTED INTO THEIR

RESPECTIVE WELLS.

TO START THE CHILLER:

TURN THE EMERGENCY ON/OFF SWITCH (SW2) TO ON POSITION.

TURN THE ENABLE/OFF/REMOTE CONTACT SWITCH (SW1) TO THE ENABLE POSITION.

IF EQUIPPED WITH THE OPTIONAL SCROLLING MARQUEE, LEAVE THE ENABLE/OFF/REMOTE CONTACT

SWITCH (SW1) IN THE OFF POSITION.

NOTE: USE ESCAPE KEY TO GO UP ONE LEVEL IN THE STRUCTURE.

USE ARROW/ESCAPE KEYS TO ILLUMINATE RUN STATUS LED. PRESS ENTER KEY UNTIL

‘VERS’ IS DISPLAYED. PRESS ENTER KEY. RECORD INFORMATION ON THE FOLLOWING PAGE.

CL-4

C. Unit Start-Up (cont)

Record Software Versions

MODE — RUN STATUS

(PRESS ENTER AND ESCAPE SIMULTANEOUSLY TO OBTAIN SOFTWARE VERSIONS)

USE ARROW/ESCAPE KEYS TO ILLUMINATE CONFIGURATION LED. PRESS ENTER KEY. RECORD

INFORMATION BELOW.

UNIT (Configuration Settings)

PRESS ESCAPE KEY TO DISPLAY ‘UNIT’. PRESS DOWN ARROW KEY TO DISPLAY ‘OPT1’.

PRESS ENTER KEY. RECORD CONFIGURATION INFORMATION BELOW:

OPTIONS1 (Options Configuration)

PRESS ESCAPE KEY TO DISPLAY ‘OPT1’. PRESS DOWN ARROW KEY TO DISPLAY ‘OPT2’.

PRESS ENTER KEY.

RECORD CONFIGURATION INFORMATION ON NEXT PAGE.

VERS

SOFTWARE VERSION NUMBERS

AUX CESR131333-xx-xx

MBB CESR131279-xx-xx

EMM CESR131174-xx-xx

MARQ CESR131171-xx-xx

NAVI CESR130227-xx-xx

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

UNIT

UNIT CONFIGURATION

SIZE UNIT SIZE XXX

SZA.1 COMPRESSOR A1 SIZE XX

SZA.2 COMPRESSOR A2 SIZE XX

SZA.3 COMPRESSOR A3 SIZE XX

A1.TY COMPRESSOR A1 DIGITAL? NO/YES

MAX.T MAXIMUM A1 UNLOAD TIME XX

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

OPT1

UNIT OPTIONS 1 HARDWARE

FLUD COOLER FLUID X

MLV.S MINIMUM LOAD VALVE SELECT NO/YES

RG.EN RETURN GAS SENSOR ENABLE ENBL/DSBL

OAT.E ENABLE OAT SENSOR ENBL/DSBL

D.G.EN DISCHRGE GAS TEMP ENABLE ENBL/DSBL

CSB.E CSB BOARDS ENABLE ENBL/DSBL

CPC COOLER PUMP CONTROL ON/OFF

PM.DY COOLER PUMP SHUTDOWN DLY XX MIN

DPME ENABLE CONDENSER PUMP ENBL/DSBL

DFLS ENABLE COND FLOW SWITCH ENBL/DSBL

CDWS ENABLE COND WTR SENSORS ENBL/DSBL

CL-5

C. Unit Start-Up (cont)

OPTIONS2 (Options Configuration)

PRESS ESCAPE KEY TO DISPLAY ‘OPT2’. PRESS DOWN ARROW KEY TO DISPLAY ‘CCN’.

PRESS ENTER KEY.

RECORD CONFIGURATION INFORMATION BELOW.

CCN (CCN Network Configuration)

PRESS ESCAPE KEY SEVERAL TIMES TO GET TO THE MODE LEVEL (BLANK DISPLAY). USE THE

ARROW KEYS TO SCROLL TO THE SET POINT LED. PRESS ENTER TO DISPLAY SETPOINTS.

RECORD CONFIGURATION INFORMATION BELOW:

SETPOINT

COMPONENT TEST

USE ESCAPE/ARROW KEYS TO ILLUMINATE CONFIGURATION LED. PRESS ENTER TO DISPLAY ‘DISP’.

PRESS ENTER AGAIN TO DISPLAY ‘TEST’ FOLLOWED BY ‘OFF’. PRESS ENTER TO STOP DISPLAY AT

‘OFF’ AND ENTER AGAIN SO ‘OFF’ DISPLAY FLASHES. ‘PASS’ AND ‘WORD’ WILL FLASH IF PASSWORD

NEEDS TO BE ENTERED. PRESS ENTER TO DISPLAY PASSWORD FIELD AND USE THE ENTER KEY FOR

EACH OF THE FOUR PASSWORD DIGITS. USE ARROW KEYS IF PASSWORD IS OTHER THAN STANDARD.

AT FLASHING ‘OFF’ DISPLAY, PRESS THE UP ARROW KEY TO DISPLAY ‘ON’ AND PRESS ENTER. ALL LED

SEGMENTS AND MODE LEDS WILL LIGHT UP. PRESS ESCAPE TO STOP THE TEST. PRESS ESCAPE TO

RETURN TO THE ‘DISP’ DISPLAY. PRESS THE ESCAPE KEY AGAIN AND USE THE ARROW KEYS TO ILLU-

MINATE THE SERVICE TEST LED. PRESS ENTER TO DISPLAY ‘TEST’. PRESS ENTER TO STOP DISPLAY

AT ‘OFF’ AND ENTER AGAIN SO ‘OFF’ FLASHES. PRESS THE UP ARROW KEY AND ENTER TO ENABLE

THE MANUAL MODE. PRESS ESCAPE AND DISPLAY NOW SAYS ‘TEST’ ‘ON’. TURN SWITCH (SW1) TO

THE ENABLE POSITION.

PRESS THE DOWN ARROW TO DISPLAY ‘OUTS’. PRESS THE ENTER KEY TO DISPLAY ‘LL.SV’. PRESS

THE ENTER KEY TO STOP DISPLAY AT ‘OFF’ AND ENTER AGAIN SO ‘OFF’ FLASHES. PRESS THE UP

ARROW KEY AND ENTER TO TURN THE OUTPUT ON. PRESS ENTER SO THE ‘ON’ DISPLAY FLASHES,

PRESS THE DOWN ARROW KEY AND THEN ENTER TO TURN THE OUTPUT OFF. OUTPUTS WILL ALSO BE

TURNED OFF OR SENT TO 0% WHEN ANOTHER OUTPUT IS TURNED ON. CHECK OFF THE ITEMS IN THE

SERVICE TEST TABLE ON THE NEXT PAGE THAT APPLY AFTER BEING TESTED.

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

OPT2

UNIT OPTIONS 2 CONTROLS

CTRL CONTROL METHOD X

LCWT HIGH LCW ALERT LIMIT XX.X F

DELY MINUTES OFF TIME XX

ICE.M ICE MODE ENABLE ENBL/DSBL

SUB-MODE ITEM ITEM EXPANSION DISPLAY ENTRY

CCN

CCNA CCN ADDRESS XXX

CCNB CCN BUS NUMBER XXX

BAUD CCN BAUD RATE X

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

COOL

COOLING SETPOINTS

CSP.1 COOLING SETPOINT 1 XXX.X °F

CSP.2 COOLING SETPOINT 2 XXX.X °F

CSP.3 ICE SETPOINT XXX.X °F

HEAD HEAD PRESSURE SETPOINTS

H.DP HEAD SET POINT XXX.X °F

FRZ BRINE FREEZE SETPOINT

BR.FZ BRINE FREEZE POINT XXX.X °F

CL-6

C. Unit Start-Up (cont)

USE ESCAPE KEY TO RETURN TO ‘OUTS’ DISPLAY. PRESS DOWN ARROW TO DISPLAY ‘CMPA’.

PRESS ENTER KEY TO DISPLAY ‘CC.A1’. NOTE THAT UNLOADERS AND HOT GAS BYPASS SOLENOIDS

CAN BE TESTED BOTH WITH AND WITHOUT COMPRESSOR(S) RUNNING. MAKE SURE ALL SERVICE

VALVES ARE OPEN AND COOLER/CONDENSER PUMPS HAVE BEEN TURNED ON BEFORE STARTING

COMPRESSORS. CHECK OFF EACH ITEM AFTER SUCCESSFUL TEST. THE CONTROL WILL ONLY START

ONE COMPRESSOR PER MINUTE. WHEN AT THE DESIRED ITEM, PRESS THE ENTER KEY TWICE TO

MAKE THE ‘OFF’ FLASH. PRESS THE UP ARROW KEY AND ENTER TO TURN THE OUTPUT ON. CHECK

OFF THE ITEMS IN THE SERVICE TEST TABLE BELOW THAT APPLY AFTER BEING TESTED.

SERVICE TEST

USE ARROW/ESCAPE KEYS TO ILLUMINATE THE TEMPERATURES LED. PRESS ENTER TO DISPLAY

‘UNIT’. PRESS ENTER AND USE THE ARROW KEYS TO RECORD TEMPERATURES FOR

SENSORS BELOW.

SUB-MODE KEYPAD

ENTRY ITEM DISPLAY ITEM

EXPANSION COMMENT Completed

(Yes/No)

TEST

ON/OFF SERVICE TEST MODE To Enable Service Test Mode,

move Enable/Off/Remote

Contact switch to OFF. Change

TEST to ON. Move switch to

ENABLE.

OUTS

OUTPUTS AND PUMPS

CLR.P ON/OFF COOLER PUMP RELAY

CND.P ON/OFF CONDENSER PUMP

UL.TM 0 TO 15 COMP A1 UNLOAD TIME

CC.H ON/OFF CRANKCASE HEATER

CW.VO ON/OFF CONDENSER VALVE OPEN

CW.VC ON/OFF CONDENSER VALVE CLOSE

LL.SV ON/OFF LIQUID LINE SOLENOID

RMT.A ON/OFF REMOTE ALARM RELAY

CMPA

CIRCUIT A COMPRESSOR TEST

CC.A1 ON/OFF COMPRESSOR A1 RELAY

UL.TM 0 TO 15 COMP A1 UNLOAD TIME

CC.A2 ON/OFF COMPRESSOR A2 RELAY

CC.A3 ON/OFF COMPRESSOR A3 RELAY

MLV ON/OFF MINIMUM LOAD VALVE RELAY

ENTER

TEMPERATURE

CLWT

CEWT

CDET

CDLT

OAT or DLWT

SPT

CL-7

C. Unit Start-Up (cont)

ALL UNITS:

MEASURE THE FOLLOWING (MEASURE WHILE MACHINE IS IN A STABLE OPERATING CONDITION):

CHECK AND ADJUST SUPERHEAT AS REQUIRED.

CIRCUIT A

DISCHARGE PRESSURE

SUCTION PRESSURE

DISCHARGE LINE TEMP

SUCTION LINE TEMP

SATURATED COND TEMP

COOLER ENTERING FLUID

COOLER LEAVING FLUID

CONDENSER ENTERING FLUID

CONDENSER LEAVING FLUID

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53300053-01 Printed in U.S.A. Form 30MP-1T Pg CL-8 1-10 Replaces: New

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - -

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE

C. Unit Start-Up (cont)

COMMENTS:

_________________________________________________________________________________________

SIGNATURES:

START-UP TECHNICIAN ___________________________________________________________________

DATE __________________________________

CUSTOMER REPRESENTATIVE _____________________________________________________________

DATE___________________________________

Carrier Aquasnap Mpw015 045 Users Manual 30mp 1t

MPW015-045 to the manual e4caf960-1c0b-41e1-ab66-8d37e842de62

Navigation menu

Versions of this User Manual:

Views

Navigation