CARRIER Package Units(both Units Combined) Manual L0912106

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

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Irn

to the Expertg_

Installation Instructions
NOTE: Read the entire
the installation

TABLE

instruction

before

SAFETY

starting

OF CONTENTS

SAFETY CONSIDERATIONS
INSTALLATION

manual

....................

...............................

Step 1 - Plan for Unit Location
Step 2 - Plan for Sequence

5
..................

of Unit Installation

Step 3 - Inspect

Unit ...........................

Step 4 - Provide

Unit Support

Step 5 - Field Fabricate

5
6
6

...................

Ductwork

Step 6 - Rig and Place Unit

......

................

.....................

Step 7 - Convert to Horizontal and Connect
Ductwork
............................

Step 8 - Install Outside

Air Hood

Step 9 - Install Flue Hood
Step 10 - Install

Gas Piping

................

.....................
....................

Step 11 - Install External Condensate
and Line ...........................
Step 12 - Make Electrical

10
11

Trap
13

Connections

Step 13 - Humidi-MiZer
TM-Space RH Controller

...........

..................

Step 14 - Adjust

Factory-Installed

Step 15 - Install

Accessories

Options

...................

13
37

........

43
43

CONSIDERATIONS

Improper
installation,
adjustment,
alteration,
service,
maintenance,
or use can cause explosion,
fire, electrical
shock or other conditions
which
may cause personal
injury or property damage.
Consult a qualified installer,
service
agency,
or your
distributor
or branch
for
information
or assistance.
The qualified
installer
or
agency must use factory-authorized
kits or accessories
when modifying
this product.
Refer to the individual
instructions
packaged
with the kits or accessories
when
installing.
Follow
all safety codes. Wear safety glasses and work
gloves. Use quenching
cloths for brazing operations
and
have a fire extinguisher
available.
Read these instructions
thoroughly
and follow all warnings or cautions attached to
the unit. Consult
local building
codes and appropriate
national
electrical
codes
(in USA,
ANSI/NFPA70,
National Electrical
Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important

to recognize

safety information.

This is the

safety-alert
symbol A'x. When you see this symbol on the
unit and in instructions
or manuals,
be alert to the
potential for personal injury.
Understand
the signal words
DANGER,
WARNING,
CAUTION,
and NOTE. These words are used with the
safety-alert
symbol. DANGER identifies the most serious
hazards
which will result in severe personal
injury or
death. WARNING signifies hazards which could result in
personal
injury or death. CAUTION
is used to identify
unsafe
practices,
which may result in minor personal
injury or product and property damage. NOTE is used to
highlight
suggestions
which
will result
in enhanced
installation,
reliability, or operation.

FIRE,EXPLOSION
HAZARD
Failuretofollowthiswarningcouldresultinpersonal
injuryordeath.
Disconnect
gaspipingfromunitwhenleaktestingat
pressure
greaterthan0.5 psig(3450Pa).Pressures
greater
than0.5psig(3450Pa)will causegasvalve
damage
resulting
in hazardous
condition.
If gasvalve
is subjected
to pressure
greaterthan0.5 psig(3450
Pa),it mustbereplaced
beforeuse.Whenpressure
testingfield-supplied
gaspipingat pressures
of 0.5
psig(3450Pa)orless,aunitconnected
to suchpiping
mustbeisolated
byclosing
themanual
gasvalve.

PERSONAL
HAZARD

INJURY

Failure to follow
injury or death.

AND

this warning

ENVIRONMENTAL

could

Relieve
pressure
and recover
all
system repair or final unit disposal.
Ware
safety
glasses
and gloves
refrigerants.
Keep torches and other
away from refrigerants
and oils.

cause

refrigerant

personal
before

when
handling
ignition sources

CUT HAZARD

ELECTRICALSHOCKHAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, always turn oft" main power switch to unit and
install lockout tag. Unit may have more than one
power switch.

UNIT

OPERATION

AND SAFETY

HAZARD

Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron ® (R-410A)
refrigerant systems operate at
higher pressures than standard R-22 systems. Do not
use R-22 service equipment or components on Puron
refrigerant equipment.

Failure to follow this caution may result in personal
injury.
Sheet metal parts may have sharp edges or burrs. Use
care and wear appropriate protective clothing, safety
glasses and gloves when handling parts and servicing
equipment.

53 3/8
E848]

NOTES:
1

DIMENSIONS ARE IN INCHES, DIMENSIONS
IN [
] ARE IN MILLIMETERS

CENTER OF GRAVITY

DIRECTION

ECONOMIZER HOOD
(OPTIONAL}

1/4

[818]

16
[406]

OF AIR FLOW

5/8

10 718
[277]

[652]
ik

RE'TURN

_
RETURN

AIR

44
[111_]

CONDENSATE
GRAIN

OPENING

8ASERAN
26

[41

[411]
16

[563]
!/8

[512]
1/4

//4

//2

SUPPLY

[747]

1/4
E

ALT

l_iil

[B71B]IAR

B 3/B

1/8

[85]
[307]

_FLUE
HOOD
[lO0]

N _L

TOP

!/2

E_Yo]

B/8

[1/8]

fELECTRICAL
DISCONNECT

CONTROL
ACCESS

BOX

INDOOR

PANEL

ACCESS

8LOWER

INSTALLED
DISCONNEcTOPTIONAL--'__FACTORY

_oo
_
Bs/B-- I_ HANDLE_

B 3/4
[95]

[67]
TYP
CURB

[1!87]

" o6

_:
L Bs,8
[213]

1/8

LEFT

[1888]

FRONT

FILTER ACCESS PANEL
(TOOL LESS}

COMP
ACCESS
PANEL

CONDENSER
COIL

INDOOR COIL
ACCESS PANEL

BACK

RELIEF
BAROMETRIC
FLOW

RIGHT

AIR

Vertical Connections

/ Economizer

B/8

[289]
E1
B //8

_oo

[155]

t
Horizontal

Connections
THRU

THESE
CONNECTION

HOLES

3/8

[55]

DIA

FIELD

POWER

SUPPLY

CONDUIT

C
D

[BO]

BIA

3/4"
7/811

POWER

[B1]
[22]

DIA
DIA

SUPPLY
GAUGE

FIEL8

NROCNOUT

314"

NPT

cONDENSATE

liB"

NPT

GAS

B llZ

[64]

81A

/ Economizer
THE
FOR

ACCESS

CONTROL

PLUG

WIRING

BASE
USE

CHART
CRBTMPWROOIAOl,

HOLE

Y¢

3/411

Z@*

{003)

DRAIN

sUPPLY

USE

REQ'D

OOBAOl

HOLE

A_C

(OO/,OO3)
]12

7/8"

24V

FOR

÷÷

(OOl}

//811

POWER
FPT

"THRU

FITTINGS

NNOCK

WINE

CONNECTION
POWER

SIZE

1/211

FOR
E

SIZES

(MAX)

UNIT

%/8

HOLE
lIB

SIZES
THREADED

REQUIRED

GAS
THE

BASEPAN"

FOR ONLY
SELECT
POWER,

×,Y,

!/8"

3116

[22Z]

OPTION,

& Z

PROVIDE8

EITHER
B/4"
OR I/2"
DEPENDING
OR WIRE

AB4

[B47]

[472]

[284]
II

FACTORY
ARE

48TC

[222]

[300]

_urc
A0_
_L?,';,%18

SIZE

OUT
PROVIGES
FLANGE

3/4"
FPT
& FITTIRG

THRU

CURB

C09303

Fig. 1

Unit Dimensional Drawing

UNIT

STD
UNIT
WEIGHT
LBS.
KG,

CORNER
WEIGHT (A)
LBS.
KO.

CORNER
WEIGHT (B)
LBS.
KG.

CORNER
WEIGHT (C)
LBS,
KG.

CORNER
WEIGHT (D)
LBS,
KG.

C.G.

HEIGHT

48TC-A04

483

219

111

125

131

116

[991]

25 [584]

48TC-AO5

557

244

124

I39

145

129

[991]

23 [584]

48TC-A06

569

258

131

147

154

137

[991]

25 [584]

17 1/4

[458]

48TC-A07

652

296

150

169

176

157

[991]

23 [584]

[511]

CORNER A

16 3/8

[416]

17 [432]
1/8

CORNERB
L

@,
0

CORNERO

CORNER
C

× --

TOP

1
i

,:]oo
FRONT

C09304

Fig. 1 - Unit Dimensional Drawing

(cont.)

INSTALLATION
Jobsite

NOTE:
Consider also the effect of adjacent units.
Be sure that unit is installed such that snow will not block
the combustion
intake or flue outlet.

Survey

Complete

the following

checks

before

1. Consult local building codes
Electrical
Code) ANSI/NFPA
tion requirements.
2. Determine
unit location
unit location.

installation.

and the NEC (National
70 for special installa-

(from project

plans)

3. Check for possible overhead obstructions
interfere with unit lifting or rigging.
Step

1 --

Plan

for Unit

or select

which

may

Location

Select a location for the unit and its support system (curb
or other) that provides
for the minimum
clearances
required
for safety.
This includes
the clearance
to
combustible
surfaces, unit performance
and service access
below,
around
and above
unit as specified
in unit
drawings. See Fig. 2.

Unit may be installed
directly on wood flooring
or on
Class A, B, or C roof-covering
material when roof curb is
used.
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air. For proper unit operation,
adequate
combustion
and
ventilation
air must be provided
in accordance
with
Section 5.3 (Air for Combustion
and Ventilation)
of the
National
Fuel
Gas Code,
ANSI
Z223.1
(American
National
Standards
Institute)
and NFPA (National
Fire
Protection
Association)
54 TIA--54--84--1.
In Canada,
installation
must be in accordance
with the CANl--B149
installation

codes for gas burning

Although unit is weatherproof,
water from higher level runoff
the unit.

appliances.
avoid locations
and overhangs

that permit
to fall onto

Locate mechanical
draft system flue assembly
(1.2 m) from any opening
through
which
products could enter the building, and at least
from any adjacent building (or per local code).
flue assembly
at least 10 ft (3.05 m) from
unit's fresh air intake hood if within 3 ft (0.91
elevation
(or per local code).
When unit
adjacent to public walkways,
flue assembly
least 7 ft (2.1 m) above grade.

_42"

Select a unit mounting
system that provides
adequate
height
to allow
installation
of condensate
trap per
requirements.
Refer
to Step 11 -Install
External
Condensate
Trap and Line - for required trap dimensions.

(1067)
J

jJ
.

1 Required
Otherwise,

Roof

bottom condensate
drain connection.
36" (914mm)
for condensate
connection.
C07459

Fig. 2 - Service

Clearance

at least 4 ft
combustion
4 ft (1.2 m)
Locate the
an adjacent
m) of same
is located
must be at

Dimensional

Drawing

mount

Check
building
codes
requirements.
Unit operating

for
weight

weight
is shown

distribution
in Table 1.

Table 1 - Operating Weights
48TC

UNITS LB (KG)

Component

A04

A05

A08

A07

Base Unit

483 (219)

537 (244)

569 (258)

852 (298)

Vertical

50 (23)

Horizontal

80 (38)

27 (10)

34 (13)

41 (15)

Cu Fins

25 (11)

43 (20)

56 (25)

73 (33)

Powered Outlet
Curb

32 (15)

Economizer

Humidi-MiZer

T_System

14-in/356

110 (50)

24-in/610

145 (66)

Step

2 1

Plan

for Sequence

of Unit

Step 4 1

Installation

The support method used for this unit will dictate different
sequences
for the steps of unit installation. For example,
on curb-mounted
units,
some
accessories
must
be
installed on the unit before the unit is placed on the curb.
Review the following
for recommended
sequences
for
installation steps.
Curb-mounted

installation

Install curb
Install field-fabricated

ductwork inside curb

Install accessory thru-base service connection package
(affects curb and unit) (refer to accessory installation
instructions for details)
Prepare bottom condensate drain connection to suit
planned condensate line routing (refer to Step 11 for
details)
Rig and place unit
Install outdoor air hood
Install flue hood
Install gas piping
Install condensate line trap and piping
Make electrical connections
installation i

Prepare pad and unit supports
Check and tighten
connection plug

the

bottom

Unit Support

Roof Curb Mount i
Accessory roof curb details and dimensions are shown in
Fig. 3. Assemble and install accessory roof curb in
accordance with instructions shipped with the curb.
NOTE:
The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with
the roof curb as shown in Fig. 3. Improperly applied
gasket can also result in air leaks and poor unit
performance.
Curb should be level. This is necessary for unit drain to
function properly. Unit leveling tolerances are show in
Fig. 4. Refer to Accessory
Roof Curb Installation
Instructions for additional information as required.
Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork ntust be attached to curb and
not to the unit. The accessory thru-the-base power and
gas connection package must be installed before the unit
is set on the roof curb. If field-installed thru-the-roof
curb gas connections are desired, use factory-supplied
1/2-in. pipe coupling and gas plate assembly to mount the
thru-the-roof
curb connection to the roof curb. Gas
connections and power connections to the unit must be
field installed after the unit is installed on the roof curb.

Install other accessories
Pad-mounted

Provide

condensate

drain

If electric and control wiring is to be routed through the
basepan, attach the accessory thru-the-base
service
connections
to the basepan in accordance with the
accessory installation instructions.
Slab Mount (Horizontal

Rig and place unit
Convert unit to side duct connection arrangement
Install field-fabricated ductwork at unit duct openings
Install outdoor air hood
Install flue hood

Units Only) i

Provide a level concrete slab that extends a minimum of
6 in. (150 mm) beyond unit cabinet. Install a gravel apron
in front of condenser coil air inlet to prevent grass and
foliage from obstructing airflow.

Install gas piping

NOTE: Horizontal units may be installed on a roof curb
if required.

Install condensate line trap and piping
Make electrical connections

Alternate Unit Support
Mount) i

Install other accessories

A non-combustible
sleeper rail can be used in the unit
curb support area. If sleeper rails cannot be used, support
the long sides of the unit with a minimum of 3 equally
spaced 4-in. x 4-in. (102 mm x 102 mm) pads on each
side.

Frame-mounted

installation i

Frame-mounted
applications
generally
follow
the
sequence
for a curb installation.
Adapt as required to
suit specific installation
plan.

Step 3 1

Inspect

unit

Inspect unit for transportation
with transportation agency.

damage.

File any claim

Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data
plate agree with power supply provided.

(In Lieu of Curb or Slab

CONNECTOR
PKG. ACCY.

D ALT
DRAIN
HOLE

GAS

POWER

ACCESSORY
POWER

CONTROL

ROOFCURB

ACCESSORY

I UNIT

SIZE

3/4" [_9}

CRBTMPWROO1A01

NPT

1'-9W16"

1'-4"

lS//'

[551]

[406]

[44.5]

3//, [19]
NPT

1/2" [12.7]
NPT

CRBTMPWROO3A01

1/2"

[12.7]
NPT

CRRFCURB001A01

1_,, [12.7]
NPT

CRRFCURB002A01

"1
I
I
I
I

j
\

I
I

_)4-

%%
\

I -

I
#

t. #

A04-A07

8. Connector package CRBTMPWROO1A01 is for
thru-the-curb type gas.
CRBTMPWROO3A01 is for thru-the-base type
gas connections.

"11

NOTES:
1. Roof curb accessory is shipped disassembled.
2. Insulated panels.
3. Dimensions in [ ] are in millimeters.
4. Roof curb: galvanized steel.
5. Attach ductwork to curb (flanges of duct rest on curb).
6. Service clearance: 4 ft on each side.
7.
Direction of airflow.

C
_II

48TC
2'-0"

I
o"
B"
[TB]

TYPICAL
o'

I
I- .....

(4)

S[OES

7/+B _

I
0'3"
[78]

I
I
I

I
SUPPLY

AIR

7/18"

[34/]

7/16"
1"

HEADS)

[/1]
(BOLT

13/16"

1"1

F
O'

1/8"

EBo_o_;
+
O"

(BOLT

#
R[D]D
(F]ELD

]NSbLATION
SUPPLIED)

7/+B"

E++]
HEM)S)
OPENING

7/16"

++E+U

HEAl)}
LT

518"

OPENING
1"

7
[8

[11]

SERVICE

7//6"

FOR

BABEPAN

(SEE

112"

(BOLT

1'
0

#8)
/

//4

ENTRY

NOTE

I/4"[?]

13/15"

[427]

8
SUPPLY

AIR

RETURN

VIEW

HEAD

INSIDE

AIR

"A-A"

BOLT
OF

FLANGE

)
S' [I 705]
?SIS"

NOTE=

CAMBR]DGEPORT

+SURE

FASTENING

DEV]CE

ALTERNATE

CONSTRUCTION.

LOCK"

CORNER

ACCEPTABLE

C07503

Fig. 3 - Roof Curb Details

Ducts passing
through
unconditioned
spaces
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical
should be ducted through the roof deck
applicable fire codes.

A minimum
UM ALLOWABLE
DIFFERENCE IN. (MM)

-"'_--_
8

A-B I

Step

1.0" (25) [

1.0" (25)

5 --

Field

Fabricate

Place

unit, the return
to comply with

around

ductwork.

Unit

Lifting holes are provided in base rails as shown
Refer to rigging instructions
on unit.

C06110

Fig. 4 - Unit Leveling Tolerances
Step

Rig and

is not required

Keep unit upright and do not drop. Spreader bars are not
required if top crating is left on unit. Rollers may be used
to move unit across a roof. Level by using unit frame as a
reference.
See Table
1 and Fig. 5 for additional
information.

B-c [ A-C

0.5" (13) J_

6 --

clearance

must

in Fig. 5.

Ductwork

NOTE:
Cabinet
return-air static pressure
(a negative
condition)
shall not exceed 0.35 in. wg (87 Pa) with
economizer
or 0.45 in. wg (112 Pa) without economizer.

UNIT DAMAGE
Failure
to follow
equipment
damage.

For vertical ducted applications,
secure all ducts to roof
curb and building
structure. Do not connect ductwork
to
unit.

(914-1371)

this

caution

may

All panels must be in place when rigging.
designed for handling by fork truck.

Insulate and weatherproof
all external
ductwork, joints,
and roof openings
with counter
flashing
and mastic in
accordance
with applicable codes.

36"- 54"

HAZARD
result

Unit is not

If using top crate as spreader bar, once unit is set,
carefully lower wooden crate off building roof top to
ground.
Ensure that no people or obstructions
are
below prior to lowering the crate.

POSITION ALL SEAL STRIPS IN PLACE
BEFORE INSTALLING UNIT ON ROOF CURB
AS CLOSE TO THIS END AS POSSIBLE.

DETAIL "A"

SEE DETAIL

<
"A"

C06005

UNIT

DIMENSIONS

MAX WEIGHT
A

IVllVl

48TC-A04

520

236

74.38

1888

991

33.38

848

48TC-A05

575

261

74.38

1888

991

33.38

848

48TC-A06

605

274

74.38

1888

991

33.38

848

48TC-A07

690

313

74.38

1888

991

41.38

1051

NOTES:
1. Dimensions in ( ) are in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail "A." Holes in base rails are centered around the
unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.
3. Unit weights do not include economizer.
Fig. 5 - Rigging

Details

Before setting the unit onto the curb, recheck gasketing on
curb.
Positioning

on Curb

Position unit on roof curb so that the following clearances
are maintained:
1/4 in. (6.4 ram) clearance
between
the
roof curb and the base rail inside the front and rear, 0.0 in.
clearance between the roof curb and the base rail inside on
the duct end of the unit. This will result in the distance
between
the roof curb and the base rail inside on the
condenser
end of the unit being
Fig. 3, section C-C.

approximately

Although unit is weatherproof,
guard
higher level runoff and overhangs.

against

equal
water

\\
\\

from

\
_M_

REMOVABLE
SUPPLY

DUCI

ItORIZONTAL
OPENING

COVER

C06108

UNIT DAMAGE

Fig. 6 - Horizontal

HAZARD

Failure
to follow
equipment
damage.

this

caution

may

All panels must be in place when rigging.
designed for handling by fork truck.

result

Unit is not

Flue vent discharge
must have a minimum
horizontal
clearance of 4 f! (1220 mm) from electric and gas meters,
gas regulators;
and gas relief
equipment.
Minimum
distance between unit and other electrically
live parts" is
48 inches (1220 mm).

Step

8 --

Install

Outside

Conversion

Panels

Air Hood

The outdoor
hood components
are shipped
in a box
located
in the unit return air compartment
behind
the
outdoor-ar
opening access panel (or economizer).
Access
is through the filter access panel. See Fig. 7.
FILTER ACCESS PANEL

Flue gas can deteriorate
building
materials.
Orient unit
such that flue gas will not affect building
materials.
Locate mechanical
draft system flue assembly at least 48
in. (1220 ram) from an adjacent building or combustible
material.
NOTE:
kit will

Installation
reduce the

material

to 18 in. (460 ram).

After unit is in
shipping materials.

COMPRESSOR
ACCESS PANEL

of accessory flue discharge deflector
minimum
clearance
to combustible

position,

remove

Step 7 -- Convert to Horizontal
Ductwork
(when required)

rigging

skids

OUTDOOR-AIR OPENING AND
INDOOR COILACCESS PANEL
C06023

and
Fig. 7 - Typical

and Connect

Unit is shipped in the vertical duct configuration. Unit
without factory-installed economizer or return air smoke
detector option may be field-converted to horizontal ducted
configuration. To convert to horizontal configuration,
remove screws from side duct opening covers and remove
covers. Using the same screws, install covers on vertical
duct openings with the insulation-side down. Seals around
duct openings must be tight. See Fig. 6.

Access

Panel Locations

1. To remove the existing unit filter access panel, raise
the panel and swing the bottom outward. The panel is
now disengaged
from the track and can be removed.
2. To remove the component box from its shipping position, remove the screw holding the hood box bracket
to the top of the economizer.
Slide the hood box out
of the unit. See Fig. 8.

Field-supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
flanges. Insulate and weatherproof all external ductwork,
joints, and roof or building openings with counter flashing
and mastic in accordance with applicable codes.

HOOD BOX
BRACKET
II

/
/

/
/
iI

i/
II

Do not cover or obscure visibility to the unit's informative
data plate when insulating horizontal ductwork.

iI
ii
iI

iI
I

C06024

Fig. 8 - Hood Box Removal

Motorized

2-Position

Damper

Hood

2. Swing out indoor coil access panel and insert the
hood sides under the panel (hood top). Use the screws
provided to attach the hood sides to the hood top. Use
screws provided to attach the hood sides to the unit.
See Fig. 11.

1. Assemble
outdoor-air
hood top and side plates as
shown in Fig. 9. Install seal strips on hood top and
sides. Put aside screen retainer and screws for later
assembly.
2. Fasten hood top and side plate
screws provided. See Fig. 9.
3. Slide outdoor-air
inlet screen

assembly
into

to unit with

screen

track

hood side plates. While holding
screen) in place,
fasten screen retainer to hood using screws provided.
4. Replace
SEAL

filter access panel.

STRIP"-,--,q_

See Fig. 7.

SCREEN
RETAINER

HOOD TOP _
SEAL

STRIP_

_,,,,.,4.,,,,._
HOOD SIDE
_

Ull)j
HOO D,,,.,..-,--,-""T_

SCREEN
HOOD

TRACKS

S,OE

3 3/8"

DIVIDER

//_

C06026

OUTDOOR

OUTDOOR-AIR

HOOD

AIR

INLET

Fig. 11 - Economizer

SCREEN

Hood

Construction

UNASSEMBLED

3. Remove the shipping tape holding the economizer
rometric relief damper in place.
4. Insert the hood divider between the hood sides.

baSee

Fig. 11 and 12. Secure hood divider with 2 screws on
each hood side. The hood divider is also used as the
bottom filter rack for the aluminum filter.
5. Open the filter clips which are located underneath
the
hood top. Insert the aluminum
filter into the bottom
filter rack (hood divider). Push the filter into position
past the open filter clips. Close the filter clips to lock
the filter into place. See Fig. 12.

HOOD
SIDE
TRACKS

HOOD

FOR AIR
;REEN

SIDES AND TOP ASSEMBLED
C07504

Fig. 9 - Outdoor-Air
Economizer

Hood

Hood Details

NOTE:
If the power exhaust accessory is to be installed
on the unit, the hood shipped with the unit will not be
used and must be discarded.
Save the aluminum filter for
use in the power

exhaust

hood assembly.

1. The indoor coil access panel will be used as the top of
the hood. Remove the screws along the sides and bottom of the indoor coil access panel. See Fig. 10.

ALUMINUM
FILTER

BAROMETRIC
RELIEF
FILTER
CLIP

SiDE
PANEL

C06027

Fig. 12 - Economizer
6. Caulk the ends of the joint
and the hood top.
7. Replace

Filter Installation
between

the unit top panel

the filter access panel.

TOP
PANEL
iNDOOR
COIL
ACCESS
PANEL

Step

INDOOR
COiL
PANEL

C06025

Fig. 10 - Indoor

Coil Access

9 1

Install

Flue

Hood

Flue hood is shipped screwed to the basepan beside the
burner compartment
access panel. Remove from shipping
location and using screws provided, install flue hood and
screen in location shown in Fig. 13.

Panel Relocation
10

gas regulator
source and unit gas valve
unit is operating at high-fire
flow rate.

connection

when

The gas supply line can approach the unit in three ways:
horizontally
from outside
the unit (across
the roof),
thru-curb/under
unit basepan
(accessory
kit required)
or
through
unit basepan
(factory-option
or accessory
kit
required).
Consult accessory
kit installation
instructions
for details on these installation
methods.

FactoryFLUE OPENING

BLOWER
ACCESS
PANEL

C07081

Fig. 13 - Flue Hood Details
Step 10 -- Install

Option Thru-Base

Connections --

Gas Piping

Installation
of the gas piping must be accordance with
local building codes and with applicable
national codes.
In U.S.A., refer to NFPA 54/ANSI
Z223.1 National Fuel
Gas Code (NFGC).
In Canada,
installation
must be
accordance
with the CAN/CSA
B149.1 and CAN/CSA
B149.2 installation
codes for gas burning appliances.

LOW VOLTAGE
CONNECTOR

HIGH VOLTAGE
CONDUIT
CONNECTOR

This unit is factory equipped for use with Natural Gas fuel
at elevations
up to 2000 ft (610 m) above sea level. Unit
may be field converted
for operation at elevations
above
2000 ft (610 m) and/or for use with liquefied petroleum
fuel. See accessory kit installation
instructions
regarding
these accessories.
For natural gas applications,
gas pressure
at unit gas
connection
must not be less than 4 in. wg (996 Pa) or
greater
than 13 in. wg (3240 Pa) while the unit is
operating.
On 48TCFA04-A06
(high-heat)
units, the gas
pressure at unit gas connection must not be less than 5 in.
wg (1245 Pa) or greater than 13 in. wg (3240 Pa) while
the unit is operating. For liquified petroleum
applications,
the gas pressure must not be less than 11 in. wg (2740 Pa)
or greater
than 13.6 in. wg (3390 Pa) at the unit
connection.
The gas supply pipe enters the unit at the burner access
panel on the front side of the unit, through the long slot at
the bottom of the access panel. The gas connection
to the
unit is made to the 1/2-in. FPT gas inlet port on the unit
gas valve

EQUIPMENT

DAMAGE

Failure to follow
to equipment.

BRASS FITTING FOR 3 TO 6 TON UNITS.
STAINLESS STEEL FITTING FOR 7 1/2 TO 12 1/2 TON.

C08015

Fig. 14 - Fittings
The thru-base
gas connector has male and female threads.
The male threads protrude above the basepan of the unit;
the female threads protrude below the basepan.
Check tightness
gas piping.

of connector

lock nuts before

connecting

Install a 1/2-in NPT street elbow on the thru-base
gas
fitting. Attach a 1/2-in pipe nipple with minimum
length
of 16-in (406 mm) (field-supplied)
to the street elbow
and extend it through the access panel at the gas support
bracket. See Fig. 15.

HAZARD

this caution

may result

in damage

When connecting
the gas line to the unit gas valve,
the installer MUST use a backup wrench to prevent
damage to the valve.

EMBOSSMENT

BRASS FITTING
FOR 3-6 TON UNITS

C08016

Fig. 15 - Gas Line Piping
Install a gas supply line that runs to the unit heating
section. Refer to the NFPA 54/NFGC or equivalent
code
for gas pipe sizing data. Do not use a pipe size smaller
than 1/2-in. Size the gas supply line to allow for a
maximum
pressure
drop of 0.5-in wg (124 Pa) between

SUPPORT
BRACKET

for 3 to 6 Ton Units Only

Other hardware
required to complete
the installation
of
the gas supply line will include a manual shutoff valve, a
sediment
trap (drip leg) and a ground-joint
union. A
pressure regulator valve may also be required (to convert
gas pressure
from pounds to inches of pressure).
The
manual shutoff valve must be located within 6-ft (1.83 m)
11

of the unit. The union, located in the final leg entering the
unit, must be located at least 9-in (230 mm) away from
the access panel to permit the panel to be removed for
service. If a regulator valve is installed, it must be located
a minimum of 4-fl (1220 mm) away from the unit's flue
outlet. Some municipal codes require that the manual
shutoff valve be located upstream of the sediment trap.
See Figures 16 and 17 for typical piping arrangements for
gas piping that has been routed through the sidewall of the
curb. See Fig. 18 for typical piping arrangement when
thru-base is used. Ensure that all piping does not block
access to the unit's main control box or limit the required
working space in front of the control box.
C08018

Fig. 18 - Gas Piping Thru-Base

Connections

_mm) rain

Thru-Curb

Adapter

When installing the gas supply line, observe local codes
pertaining to gas pipe installations. Refer to the NFPA
54/ANSI
Z223.1 NFGC latest edition (in Canada,
CAN/CSA B149.1). In the absence of local building
codes,
adhere
to
the
following
pertinent
recommendations:

Jnion

1. Avoid low spots in long runs of pipe. Grade all pipe
1/4-in. in every 15 fl (7 mm in every 5 m) to prevent
traps. Grade all horizontal runs downward to risers.
Use risers to connect to heating section and to meter.
2. Protect all segments of piping system against physical
and thermal damage. Support all piping with appropriate straps, hangers, etc. Use a minimum of one
hanger every 6 fl (1.8 m). For pipe sizes larger than
1/2-in., follow recommendations of national codes.

Unit Base Rail

Shut Off
Valve

_/Drip
Leg

3. Apply joint compound (pipe dope) sparingly and only
to male threads of joint when making pipe connections. Use only pipe dope that is resistant to action of
liquefied petroleum gases as specified by local and/or
national codes. If using PTFE (Teflon) tape, ensure
the material is Double Density type and is labeled for
use on gas lines. Apply tape per manufacturer's instructions.

C07469

Fig. 16 - Gas Piping

min
Burner

4. Pressure-test all gas piping in accordance with local
and national plumbing and gas codes before connecting piping to unit.

Access
Panel
Union
Thru-Curb

Adapter

Unit Bas_e Rail

/
Shut Off
Valve

Drip
Leg

C07470

NOTE: Pressure test the gas supply system after the gas
supply piping is connected to the gas valve. The supply
piping must be disconnected from the gas valve during the
testing of the piping systems when test pressure is in
excess of 0.5 psig (3450 Pa). Pressure test the gas supply
piping system at pressures equal to or less than 0.5 psig
(3450 Pa). The unit heating section must be isolated from
the gas piping system by closing the external main manual
shutoff valve and slightly opening the ground-joint union.
Check for gas leaks at the field-installed
and
factory-installed
gas lines after all piping connections
have been completed. Use soap-and-water
solution (or
method specified by local codes and/or regulations).

Fig. 17 - Gas Piping

FIRE

OR EXPLOSION

HAZARD

Failure to follow this warning could result in personal
injury, death and/or property damage.
• Connect gas pipe to unit using a backup wrench to
avoid damaging gas controls.
• Never purge a gas line into a combustion chamber.
• Never test for gas leaks with an open flame. Use a
commercially available soap solution made
specifically for the detection of leaks to check all
connections.
• Use proper length of pipe to avoid stress on gas
control manifold.

CONDENSATE

PAN

(SIDE

VIEW)
ALTERNATE

STANDARD
SIDE DRAIN

DRAIN

PLUG
BOTTOM

C08021

Fig. 20 - Condensate

MINIMUM

Drain

orifice

hole is essential

Pan

(Side View)

PITCH

NOTE:
If orifice hole appears damaged or it is suspected
to have been redrilled, check orifice hole with a numbered
drill bit of correct
size. Never
redrill
an orifice.
A
burr-free
and squarely aligned
proper flame characteristics.

DRAIN

(FACTORY-INSTALLED)

2" (54) MIN

SEE

for

NOTE

TO ROOF
DRAIN

_'---..ROOF
CURB
DRAIN

PLUG

NOTE: Trap should be deep enough to offset maximum
difference.
A 4" (102) trap is recommended

unit static

C08022

Fig. 21 - Condensate

Drain Piping Details

All units" must have an external trap for condensate
drainage. Install a trap at least 4-in. (102 mm) deep and
protect against freeze-up. If drain line is installed
downstream from the external trap, pitch the line away
from the unit at i-in. per 10 f! (25 mm in 3 in) of run. Do
not use a pipe size smaller than the unit connection

(-%-in.).
A93059

Fig. 19 - Orifice

Step 11 --

Install External
and Line

Step 12 -- Make

Hole

Condensate

Electrical

Connections

Trap
ELECTRICAL

The unit has one 3/4-in. condensate drain connection on
the end of the condensate pan and an alternate connection
on the bottom. See Fig. 20. Unit airflow configuration
does not determine which drain connection to use. Either
drain connection can be used with vertical or horizontal

Failure to follow
injury or death.

HAZARD

this warning

could

result

in personal

Do not use gas piping as an electrical
ground. Unit
cabinet
must
have
an uninterrupted,
unbroken
electrical
ground
to minimize
the possibility
of
personal injury if an electrical fault should occur. This
ground may consist of electrical
wire connected
to
unit ground lug in control compartment,
or conduit
approved
for electrical
ground
when
installed
in
accordance
with NEC
(National
Electrical
Code);
ANSI/NFPA
70, latest edition (in Canada, Canadian
Electrical
Code
CSA
[Canadian
Standards
Association]
C22.1), and local electrical codes.

applications.
When using the standard side drain connection, ensure the
red plug in the alternate bottom connection is tight. Do
this before setting the unit in place. The red drain pan can
be tightened with a ]/2-in. square socket drive extension.
To use the alternate bottom drain connection, remove the
red drain plug from the bottom connection (use a ]/2-in.
square socket drive extension) and install it in the side
drain connection.
The piping for the condensate drain and external trap can
be completed after the unit is in place. See Fig. 21.

SHOCK

NOTE:
Check all factory and field electrical connections
for tightness.
Field-supplied
wiring shall conform with
the limitations of 63°F (33°C) rise.

Field Power

control

Supply --

If equipped
with optional Powered
Convenience
Outlet:
The power
source
leads to the convenience
outlet's
transformer
primary are not factory connected.
Installer
must connect these leads according
to required operation
of the convenience
outlet.
If an always-energized
convenience
outlet
operation
is desired,
connect
the
source
leads
to the line
side of the unit-mounted

box.

The

manual

switch

handle

through
an opening
in the access
factory test leads (see Fig. 22).

is accessible

panel.

Discard

the

FIRE HAZARD
Failure
to follow
this warning
intermittent operation or performance

disconnect.
(Check with local codes to ensure this method
is acceptable
in your area.) If a de-energize
via unit
disconnect
switch operation
of the convenience
outlet is
desired, connect the source leads to the load side of the
unit disconnect.
On a unit without
a unit-mounted

Do not connect

aluminum

could
result
satisfaction.

wire between

disconnect

switch and 48TC unit. Use only copper wire.
(See Fig. 23.)

disconnect,
connect
the source
leads
to compressor
contactor
C and indoor fan contactor
IFC pressure lugs
with unit field power leads.
Refer to Fig.
the discussion
page 15.

ELECTRIC
DISCONNECT
SWITCH

26 for power transformer
connections
and
on connecting
the convenience
outlet on

Field power wires are connected
to the unit at line-side
pressure lugs on compressor
contactor
C and indoor fan
contactor
IFC (see wiring diagram label for control box
component
arrangement)
or at factory-installed
option
non-fused
disconnect
switch. Max wire size is #2 AWG
(copper

only).

Disconnect

Option

C?tFC_

I"--

plate

.=L=.L=

a
a

per

NEC

Disconnect

per
NEC

_-i--7-a
208/230-1-60

(1-ph
IFM)

(+)

=J=-L-J=_
Disconnect

-7--T--I-L1
L2

575-3-60

Option

....

,@
,q>o,°2i!i'o,
Z

}

Disconnect factory test leads; discard.
C07494

Fig. 22 - Power

Wiring

Connections

NOTE:
TEST LEADS
- Unit may be equipped
with
short leads (pigtails) on the field line connection
points on
contactor C or optional disconnect switch. These leads are
for factory run-test
purposes
only; remove
and discard
before connecting
field power wires to unit connection
points. Make field power connections
directly
to line
connection pressure lugs only.

Units with Factory-Installed
The factory-installed
in a weatherproof

Disconnect --

option disconnect
enclosure
located

the disconnect

on the unit cabinet.

Provide a ground-fault
and short-circuit over-current
protection device (fuse or breaker) per NEC Article 440
(or local codes). Refer to unit informative data plate for
MOCP (Maximum Over-current Protection) device size.
All field wiring must comply with the NEC and local
requirements.

....

if mounting

All field wiring must comply with NEC and all local
codes. Size wire based on MCA (Minimum Circuit Amps)
on the unit informative plate. See Fig. 22 and the unit
label diagram for power wiring connections to the unit
power terminal blocks and equipment ground. Maximum
wire size is #2 ga AWG per pole.

375-3-60

Disconnect --

All units --

208/230-3-60
460-3-60

Units With Disconnect

Switch and Unit

When installing
units, provide
a disconnect
switch per
NEC
(National
Electrical
Code)
of adequate
size.
Disconnect
sizing data is provided on the unit informative
plate. Locate on unit cabinet or within sight of the unit per
national
or local codes. Do not cover unit informative

79
J

A93033

Fig. 23 - Disconnect
Units Without Factory-Installed

(See Fig. 22.)
Units Without

WIRE ONLY

switch
under

is located
the main

All units except 208/230-v units are factory wired for the
voltage shown on the nameplate. If the 208/230-v unit is"
to be connected to a 208-v power suppl); the control
transformer must be rewired by moving the black wire
with the 1/4-in. female spade connector from the 230-v
connection
and
mowng it to the 200-v
1/4-in.
male
terminal on the primary side of the transformen Refer to
unit label diagram for additional information. Field power
wires will be connected line-side pressure lugs on the
power terminal block or at factory-installed
option
non-fused disconnect.
NOTE:
Check all factory and field electrical connections
for tightness.
Field-supplied
wiring shall conform with
the limitations of 63°F (33°C) rise.
14

Convenience

Outlets-

ELECTRICAL
Failure to follow
injury or death.

OPERATION

HAZARD

this warning

could result

Loosen the two screws at the GFCI duplex outlet, until
approximately
1/2-in (13 mm) under screw heads are
exposed. Press the gasket over the screw heads. Slip the
backing plate over the screw heads at the keyhole slots
and align with the gasket; tighten the two screws until
snug (do not over-tighten).
in personal

Units
with convenience
outlet
circuits
may use
multiple
disconnects.
Check convenience
outlet for
power status before opening unit for service. Locate
its disconnect
switch,
if appropriate,
and open it.
Tag-out this switch, if necessary.

Mount the weatherproof
cover to the backing
plate as
shown in Fig. 25. Remove two slot fillers in the bottom of
the cover to permit service tool cords to exit the cover.
Check for full closing and latching.
COVER - WHILE-IN-USE
WEATHERPROOF

RECEPTACLE
NOTINCLUDED

Two types of convenience
outlets are offered on 48TC
models:
Non-powered
and unit-powered.
Both types
provide
a
125-volt
GFCI
(ground-fault
circuit-interrupter)
duplex
receptacle
rated
at 15-A
behind a hinged waterproof
access cover, located on the
end panel of the unit. See Fig. 24.
Pwd-CO
Transformer

Convenience
Outlet
GFCI

S
BASE PLATE FOR
GFCIRECEPTACLE

Pwd-CO
Fuse

C09022

Fig. 25 - Weatherproof

'_ Control

Cover

Installation

Non-powered
type:
This
type
requires
the
field
installation of a general-purpose
125-volt
15-A circuit
powered from a source elsewhere
in the building. Observe
national and local codes when selecting wire size, fuse or
breaker
requirements
and disconnect
switch
size and
location.
Route 125-v power supply conductors
into the
bottom of the utility box containing
the duplex receptacle.

Box

Access Panel

C08128

Fig. 24 - Convenience
Installing Weatherproof

Outlet Location

Cover -

A
weatherproof
while-in-use
cover
for
the
factory-installed
convenience
outlets is now required by
UL standards. This cover cannot be factory-mounted
due
its depth; it must be installed
at unit installation.
For
shipment, the convenience
outlet is covered with a blank
cover plate.
The weatherproof
cover kit is shipped in the unit's control
box. The kit includes the hinged cover, a backing plate
and gasket.
DISCONNECT
ALL
POWER
TO
UNIT
AND
CONVENIENCE
OUTLET.
Remove the blank cover
discard the blank cover.

plate

at the convenience

outlet;

Unit-powered
type:
A unit-mounted
transformer
is
factory-installed
to stepdown
the main power
supply
voltage to the unit to l15-v at the duplex receptacle.
This
option also includes a manual switch with fuse, located in
a utility box and mounted
on a bracket
behind
the
convenience
outlet; access is through the unit's control
box access panel. See Fig. 24.
The primary leads to the convenience
outlet transformer
are not factory-connected.
Selection
of primary
power
source is a customer-option.
If local codes permit,
the
transformer
primary
leads
can be connected
at the
line-side
terminals
on the unit-mounted
non-fused
disconnect
or HACR breaker
switch; this will provide
service power to the unit when the unit disconnect
switch
or HACR switch is open. Other connection
methods will
result in the convenience
outlet circuit being de-energized
when the unit disconnect
or HACR switch is open. See
Fig. 26.

S?HE aTIfl

..,_1 E IEi/CE

if the GFCI receptacle
does not trip as required.
RESET button to clear the tripped condition.

C,'TLET

460,/
i_ D

T_N4

' U

Gi!_

Factory-

....
E".M3

the

Connections --

BLL
RE{}¸
_EL

........

LOCAL (109E

7GR_

I..... _

SECC, ND;R}

Option Thru-Base

Press

_ED
'EL

C0N_ECT _>E[_

G:¢!_
I

BLJ

120V

{}i), 'x£

;o ;q2#U
6FI

S_/ITCH

FSE

Check tightness of connector lock nuts before connecting
electrical conduits.

,IbG_

'EL

,,HT

C08283

UNIT
CONNECT
VOLTAGE
AS

PRIMARY
CONNECTIONS

TRANSFORMER
TERMINALS

208,
230

240

LI: RED +YEL
L2: BLU + GRA

H1 + H3
H2 + H4

460

480

L1: RED
Splice BLU + YEL
L2: GRA

H1
H2 + H3
H4

575

600

L1: RED
L2: GRA

Field-supplied
and field-installed
liquid tight conduit
connectors and conduit may be attached to the connectors
on the basepan. Pull correctly rated high voltage and low
voltage through appropriate conduits. Connect the power
conduit to the internal disconnect (if unit is so equipped)
or to the external disconnect (through unit side panel). A
hole must be field cut in the main control box bottom on
the left side so the 24-v control connections can be made.
Connect the control power conduit to the unit control box
at this hole.

H1
H2

Fig. 26 - Powered Convenience

This service connection kit consists of a 1/2-in NPT gas
adapter fitting (brass), a 1/2-in electrical bulkhead
connector and a 3/4-in electrical bulkhead connector, all
factory-installed
in the embossed (raised) section of the
unit basepan in the condenser section. The 3/4-in
bulkhead connector enables the low-voltage control wires
to pass through the basepan. The 1/2-in electrical
bulkhead connector allows the high-voltage power wires
to pass through the basepan. See Fig. 21.

Units without Thru-Base
1. Install power wiring
ings. Install conduit

Outlet Wiring

Connections -conduit through side panel openbetween disconnect
and control

box.

Fuse on power type: The factory fuse is a Bussman
"Fusetron" T-15, non-renewable screw-in (Edison base)
type plug fuse.

Convenience

Outlet

use : 15 Amps 2 to 3 Hours

Maximum Continuous

use : 8 Amps 24/7

50HJ542739

lines to terminal

connections

as shown

Voltage to compressor
terminals
during operation must be
within voltage range indicated
on unit nameplate.
See
Table 9. On 3-phase
units, voltages between phases must
be balanced within 2% and the current within 10%. Use
the formula shown in the legend for Table 9, Note 2 to
determine the percent of voltage imbalance.
Operation
on
improper
line voltage
or excessive
phase imbalance
constitutes
abuse and may cause damage
to electrical
components.
Such
operation
would
invalidate
any
applicable
Carrier warranty.

Utilization

Maximum Intermittent

2. Install power
in Fig. 22.

13.0

Field

Control

Wiring

A9225

Fig. 27 - Convenience

Outlet

Utilization

Notice

Label

Duty Cycle: the unit-powered
convenience
outlet has a
duty cycle limitation.
The transformer
is intended
to
provide power on an intermittent
basis for service tools,
lamps, etc; it is not intended to provide 15-amps loading
for continuous
duty loads (such as electric heaters
for
overnight
use). Observe a 50% limit on circuit loading
above 8-amps.
Convenience

outlet usage rating:

Continuous

usage:

8 amps maximum

Intermittent

usage:

up to 15 amps maximum
up to 2 hours maximum

for

Test the GFCI receptacle
by pressing the TEST button on
the face of the receptacle
to trip and open the receptacle.
Check for proper grounding
wires and power line phasing

The 48TC unit requires an external
temperature
control
device. This device can be a thermostat
(field-supplied)
or a PremierLink
controller (available
as factory-installed
option or as field-installed
accessory, for use on a Carrier
Comfort
Network
or as a stand alone control)
or the
RTU-MP
Controller
for Building
Management
Systems
using non-CCN
protocols
(RTU-MP
is available
as a
factory-installed
option only).

Thermostat

Install a Carrier-approved
accessory thermostat
according
to installation
instructions
included
with the accessory.
For complete
economizer
function,
select a two-stage
cooling thermostat.
Locate the thermostat
accessory on a
solid wall in the conditioned
space to sense average
temperature
in accordance
with the thermostat
installation
instructions.

RACEWAY

If the thermostat contains a logic circuit requiring 24-v
power, use a thermostat cable or equivalent single leads of
different colors with minimum of seven leads. If the
thermostat does not require a 24-v source (no "C"
connection required), use a thermostat cable or equivalent
with minimum of six leads. Check the thermostat
installation instructions for additional features which
might require additional conductors in the cable.
Using unit-mounted
convenience outlets:
unit-mounded
convenience
outlet circuits

Units with
will often

require that two disconnects be opened to de-energize all
power to the unit. Treat all units as electrically energized
until the convenience outlet power is also checked and
de-energization is confirmed. Observe National Electrical
Code Article 210, Branch Circuits, for use of convenience
outlets.
For wire runs up to 50 ft. (15 m), use no. 18 AWG
(American Wire Gage) insulated wire [35°C (95°F)
minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWG
insulated wire [35°C (95°F) minimum]. For over 75 ft.
(23 m), use no. 14 AWG insulated wire [35°C (95°F)
minimum]. All wire sizes larger than no. 18 AWG cannot
be directly connected to the thermostat and will require a
junction box and splice at the thermostat.
Central
Terminal
Board

Typical
Thermostat
Connections

(Note 2)

FwSl
%
%
Fq

HOLE IN END PANEL (HIDDEN)
C08027

Fig. 29 - Field Control Wiring Raceway
Heat Anticipator Settings -Set heat anticipator settings at 0.14 amp for the first stage
and 0.14 amp for second-stage heating, when available.
Smoke Detectors -Smoke detectors are available as factory-installed
options
on 48TC models. Smoke detectors
may be specified for
Supply
Air only or for Return
Air without
or with
economizer
or in combination
of Supply Air and Return
Air. Return Air smoke detectors
are arranged for vertical
return configurations
only. All components
necessary for
operation
are factory-provided
and mounted.
The unit is
factory-configured
for
immediate
smoke
detector
shutdown operation;
additional
wiring or modifications
to
unit terminal board may be necessary to complete the unit
and smoke
detector
configuration
to meet
project
requirements.

T
H
E
R
M
O
S
T
A
T

Units equipped with factory-optional
Return Air smoke
detectors require a relocation
of the sensor module at unit
installation. See "Completing
Installation
of Return Air
Smoke Sensor:" on page 19 for details.

System
Note

Typical multi4unction marking. Follow manufacturer's
instructions to select Y2.

Note

Y2 to Y2 connection required on single-stage
integrated economizer function is desired.

mmm

configuration

cooling units when

Field Wiring
C08069

Fig. 28 - Low-Voltage

Connections

Unit without thru-base connection kit -Pass the thermostat control wires through the hole
provided in the corner post; then feed the wires through
the raceway built into the corner post to the control box.
Pull the wires over to the terminal strip on the upper-left
corner of the Controls Connection Board. See Fig. 29.
NOTE:
If thru-the-bottom
connections accessory is
used, refer to the accessory installation instructions for
information on routing power and control wiring.

The smoke
detector
system
consists
of a four-wire
controller
and one or two sensors. Its primary function is
to shut down the rooftop unit in order to prevent smoke
from circulating
throughout
the building.
It is not to be
used as a life saving device.

Controller
The controller (see Fig. 30) includes a controller housing,
a printed circuit board, and a clear plastic cover. The
controller can be connected to one or two compatible duct
smoke sensors. The clear plastic cover is secured to the
housing with a single captive screw for easy access to the
wiring terminals. The controller has three LEDs (for
Power, Trouble and Alarm) and a manual test/reset button
(on the cover face).

For installations
using two
detector
does not differentiate
alarm or trouble condition.

sensors,
which

the duct smoke
sensor signals an

Duct smoke sensor
controller

Conduit
_

(supplied

nuts

by installer)

Conduitsupport

plate

Exhausttube

;_Terminalblockcover
Controller

housing

Covergasket
F(ordefing
option)

and electronics

Exhaustgasket
F

Conduit couplings
(supplied by installer)

Controller cover

See
Detail

Fastener

Sensorhousing
and electronics

t
A

\\\\\\\

(2x)

Intake /
gasket

\\
\ \ \

Cover
\\

Trouble

\\\

Plug

gasket

(ordering

option)

\\\\\

\_\\

Sensor

cover

C08208

Fig. 30 - Controller

Assembly
Magnetic

I_l_

.....

Sensor
The sensor (see Fig. 31) includes a plastic housing,
a
printed circuit board, a clear plastic cover, a sampling
tube inlet and an exhaust tube. The sampling tube (when
used) and exhaust tube are attached
during installation.
The sampling tube varies in length depending on the size
of the rooftop unit. The clear plastic cover permits visual
inspections without having to disassemble
the sensor. The
cover attaches
to the sensor housing using four captive
screws and forms an airtight chamber around the sensing
electronics.
Each sensor includes a harness with an RJ45
terminal for connecting
to the controller. Each sensor has
four LEDs (for Power, Trouble, Alarm and Dirty) and a
manual test/reset button (on the left-side of the housing).
Air

is introduced

to the

duct

smoke

detector

sensor's

sensing chamber through a sampling tube that extends into
the HVAC duct and is directed back into the ventilation

.......
JjL ......

T rou bl e

D irty

C08209

Fig. 31 - Smoke

Smoke Detector

Detector

Sensor

Locations

Supply Air -- The Supply Air smoke detector sensor is
located to the left of the unit's indoor (supply) fan. See
Fig. 32. Access is through the fan access panel. There is
no sampling tube used at this location. The sampling tube
inlet extends through the side plate of the fan housing
(into a high pressure area). The controller is located on a
bracket to the right of the return filter, accessed through
the lift-off filter panel.

system through a (shorter) exhaust tube. The difference in
air pressure between the two tubes pulls the sampled air
through the sensing chamber. When a sufficient amount of
smoke is detected
in the sensing
chamber,
the sensor
signals an alarm state and the controller
automatically
takes the appropriate
action to shut down fans and
blowers, change over air handling systems, notify the fire
alarm control panel, etc.
The sensor uses a process called differential
sensing to
prevent
gradual
environmental
changes
from triggering
false alarms. A rapid change in environmental
conditions,
such as smoke from a fire, causes the sensor to signal an
alarm state but dust and debris accumulated
over time
does not.

,/
Smoke

Detector

Sensor

C08245

Fig. 32 - Typical

Supply Air Smoke
Location

Detector

Sensor

Return Air without Economizer
-- The sampling tube is
located across the return air opening on the unit basepan.
See Fig. 33. The holes
in the sampling
tube face
downward,
into the return air stream. The sampling tube is
connected
via tubing to the return air sensor that is
mounted on a bracket high on the partition between return
filter and controller location. (This sensor is shipped in a
flat-mounting
location.
Installation
requires
that this
sensor be relocated to its operating location and the tubing
to the sampling
tube be connected.
See "Completing
Installation
of Return Air Smoke Sensor:"
for details.)
Return Air Detector
_

Completing
Sensor:

Installation

of Return

Air Smoke

1. Unscrew
the two screws
holding
the Return Air
Sensor detector plate. See Fig. 35. Save the screws.
2. Remove

the Return

Air Sensor

and its detector

3. Rotate the detector plate so the sensor
wards and the sampling tube connection
tom. See Fig. 36.

plate.

is facing outis on the bot-

4. Screw the sensor and detector plate into its operating
position
using screws from Step 1. Make sure the
sampling tube connection
is on the bottom and the exhaust tube is on the top. See Fig. 36.

module

(shipping position shown)*

5. Connect the flexible tube on the sampling
sampling tube on the basepan.

inlet to the

Exhaust

Return Air Detector
*RA detector must be moved from shipping

Sampling

Tube

position to operating

Tubes

Sample Tube

position by installer
C08126

C07307

Fig. 33 - Typical

Return

Air Detector

Location

Fig. 35 - Return

Air Detector

Fig. 36 - Return

Air Sensor

Shipping

Position

Return Air with Economizer
-- The sampling
tube is
inserted
through
the side plates
of the economizer
housing, placing it across the return air opening on the
unit basepan. See Fig. 34. The holes in the sampling tube
face downward,
into the return air stream. The sampling
tube is connected via tubing to the return air sensor that is
mounted on a bracket high on the partition between return
filter and controller location. (This sensor is shipped in a
flat-mounting
location.
Installation
requires
that this
sensor be relocated to its operating location and the tubing
to the sampling
tube be connected.
See the following
installation
procedure.)
C08127

Refer to Catalog
No.
on additional
control

features of these
coordination.

including

C08129

Fig. 34 - Return

Air Sampling

Position

Additional
Application
Data -HKRNKA-1XA
for discussions

Return Air
Sampling Tube

_/<

Operating

Tube Location
19

smoke

detectors

multiple

unit

PremierLink

(Factory-Option)

HVAC SENSOR INPUTS

SPACE TEMP _._
TSTATC_

SET POINT ._

8tU

SUPPLY AIR TEMP -__
OUTDOOR

]

Gm ,_

_¢

I
!

2;_1oi

TEMP _--_

INDOOR AIR QUALITY
OUTDOOR

s_r

t_m

Paff Nt_be_

330SPREMLK

_,
.... --

PremcerL_nk

AIR QUALITY

.m__

[

DUAL MODE SENSOR!STAT
COMP SAFETY (Y1) 7
FIRE SHUTDOWN

(Y2) /_

8_mu
{Z_°AJ

SUPPLY FAN STATUS (Wl)
NOT USED (W2) _'_
ENTHALPY

STATUS (ENTH)

lII=, .....- ..............
°tt
.............................

..I
\

/
CCN/LEN
PORT

k_Jl,_0'l|

NAVIGATOR
PORT

4-20MA
ECONOMIZER

&°

'1 'i

",..

INDOOR
FAN MOTOR

COMPR
1&2

HEAT
LOW/HIGH

EXHAUST
RVS VALVE

OUTPUTS
C08199

Fig. 37 - PremierLink
The PremierLink controller (see Fig. 37) is compatible
with Carrier Comfort Network ® (CCN) devices. This
control is designed to allow users the access and ability to
change factory-defined
settings, thus expanding
the
function of the standard unit control board. CCN service
access tools include System Pilot (TM), Touch Pilot (TM)
and Service Tool. (Standard tier display tools Navigator
and Scrolling Marquee are not suitable for use with latest
PremierLink controller (Version 2.x).)
TM

Controller

The SAT is factory-wired. The SAT probe is wire-tied to
the supply-air opening (on the horizontal opening end) in
its shipping position. Remove the sensor for installation.
Re-position the sensor in the flange of the supply-air
opening or in the supply air duct (as required by local
codes). Drill or punch a 1/2-in. hole in the flange or duct.
Use two field-supplied, self-drilling screws to secure the
sensor probe in a horizontal orientation. See Fig. 38.

The PremierLink control is factory-mounted in the 48TC
unit's main control box to the left of the Central Terminal
Board (CTB). Factory wiring is completed
through
harnesses connected
to the CTB thermostat.
Field
connections are made at a 16-pole terminal block (TB1)
located on the bottom shelf of the unit control box in front
of the PremierLink
controller. The factory-installed
PremierLink control includes the supply-air temperature
(SAT) sensor. The outdoor air temperature (OAT) sensor is
included in the FIOP/accessory EconoMi$er
2 package.

\
m

The PremierLink
controller
requires the use of a Carrier
electronic
thermostat
or a CCN connection
for time
broadcast
to initiate
its internal
timeclock.
This is
necessary
for broadcast
(occupied/unoccupied).

time

day

RETURN AIR

SENSOR

SUPPLYAIR

functions

NOTE:
PremierLink
controller
is shipped
in Sensor
mode. To be used with a thermostat,
the PremierLink
controller must be configured
to Thermostat
mode. Refer
to PremierLink
Configuration
instructions
for Operating
Mode.

Supply
Air
Temperature
(SAT)
Sensor
-On
FlOP-equipped
48TC unit, the unit is supplied with a
supply-air
temperature (SAT) sensor (33ZCSENSAT).
This sensor is a tubular probe type, approx 6-inches (12.7
mm) in length. It is a nominal 10-k ohm thermistor.

C08200

Fig. 38 - Typical Mounting Location for Supply Air
Temperature (SAT) Sensor on Small Rooftop Units
NOTE:
Refer to Form 33CS-58SI
for complete
PremierLink
configuration,
operating
sequences
and
troubleshooting information. Have a copy of this manual
available at unit start-up.
NOTE:
airstream
devices.
with any
2O

The sensor must be mounted in the discharge
downstream of the cooling coil and any heating
Be sure the probe tip does not come in contact
of the unit's heater surfaces.

C09300

Fig. 39 - PremierLink

Wiring
21

Schematic

Outdoor Air Temperature
(OAT) Sensor I The OAT is
factory-mounted
in
the
EconoMi$er2
(FIOP
or
accessory).
It is a nominal 10k ohm thermistor
attached to
an eyelet mounting ring.
EconoMi$er2

The PremierLink

control

is used

Connect T-55 - See
connections.
Connect
terminals

Fig. 40 for typical T-55
the T-55 SEN terminals

internal
to TB1

1 and 3 (see Fig. 41).
TB1

with

EconoMiSer2
(option
or accessory)
for outdoor
air
management.
The damper position is controlled
directly
by the PremierLink
control; EconoMi$er2
has no internal
logic device.

C08212

Fig. 41 - PremierLink
Outdoor air management
functions
field-installation
of these accessory

can be enhanced
control devices:

T-55

Sensor

with

Space CO: sensor

Connect
T-56
- See
Fig.
42 for T-56
internal
connections.
Install
a jumper
between
SEN and SET
terminals
as illustrated.
Connect
T-56 terminals
to TB1

Outdoor

terminals

Enthalpy

control

(outdoor

air or differential

sensors)

air CO: sensor

Refer to Table 2 for accessory

1, 3 and 5 (see Fig. 43).

part numbers.

Field connections
I
Field connections
for accessory
sensor and input devices are made at the 16-pole terminal
block (TB1) located on the control box bottom shelf in
front of the PremierLink
control (See Fig. 39). Some input
devices also require a 24-vac
signal source; connect at
CTB terminal R at "THERMOSTAT"
connection
strip for
this signal source. See connections
figures on following
pages for field connection
locations
(and for continued
connections
at the PremierLink
board inputs).

CCN COM

SENSOR

Table 3 provides a summary of field connections
for units
equipped with Space Sensor. Table 4 provides a summary
of field connections
for units equipped
with Space
Thermostat.

WIRING

JUMPER
TERM INALS
AS SHOWN
©

Space
Sensors
The
PremierLink
controller
is
factory-shipped
configured
for Space Sensor Mode. A
Carrier T-55 or T-56 space sensor must be used. T-55
space temperature
sensor provides
a signal of space
temperature
to the PremierLink
control.
T-56 provides
same
space
temperature
signal
plus it allows
for
adjustment of space temperature
setpoints from the face of
the sensor by the occupants.

C08202

Fig. 42 - T-56

Internal

Connections

TB1

D
TB1

%
!_l'---Jumper
s_

_, _ _W_HL(Q_N_)L',
\ .\ 5,,_ 0Ep(+)j.
BL@) t]

C08213

CCN COM

Fig. 43 - PremierLink

Connect
\

BRN (GND&

[ ',

SENSOR

WIRING

A 7-wire

thermostat

connection

connection
strip for these. Connect the thermostat's
Y1,
Y2, W1, W2 and G terminals
to PremierLink
TB1 as
shown in Fig. 44.

4:b,

C08201

Space Temperature

Sensor

requires a 24-v power source and a common connection.
Use the R and C terminals
on the CTB's THERMOSTAT

Fig. 40 - T-55

Thermostat

T-56

Sensor

Wiring

If the 48TC unit is equipped with factory-installed
smoke
detector(s),
disconnect
the factory BLU lead at TB1-6
(Y2) before connecting
the thermostat.
Identify the BLU
lead originating
at CTB-DDC-1;
disconnect
at TB1-6
and tape off. Confirm that the second BLU lead at TB1-6
remains connected to PremierLink
J4-8.
22

SPACE
THERMOSTAT

CTB
THERMOSTAT

D
TB1

42D
(Z)

E]
%
CTB

THERMOSTAT
C08119

Fig. 44 - Space Thermostat

Table 2 - PremierLink

Connections

Sensor

Usage

APPLICATION

OUTDOOR AIR
TEMPERATURE
SENSOR

RETURN AIR
TEMPERATURE
SENSOR

Differential Dry Bulb
Temperature with
PremierLink
(PremierLink requires
4- 20 mA Actuator)

Included CRTEMPSNOO1AO0

Required 33ZCT55SPT
or equivalent

Single Enthalpy with
PremierLink
(PremierLink requires
4- 20mA Actuator)

Included Not Used

Requires 33CSENTHSW

Differential Enthalpy
with PremierLink
(PremierLink requires
4- 20mA Actuator)

Included Not Used

Requires 33CSENTHSW
or equivalent

OUTDOOR AIR
ENTHALPY SENSOR

NOTES:
CO 2 Sensors (Optional):
33ZCSENC02
Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPC02
Aspirator box used for duct-mounted
CO 2 room sensor.
33ZCT55C02
Space temperature and CO2 room sensor with override.
33ZCT56C02
Space temperature and CO2 room sensor with override and setpoint.

RETURN AIR
ENTHALPY SENSOR

Requires 33CSENTSEN
or equivalent

Table 3 - Space

Mode

FIELD CONNECTION

INPUT SIGNAL

T55- SEN/T56- SEN

Analog (1Okthermistor)

RMTOCC

Discrete, 24VAC

T55- SEN/T56- SEN

Analog (1Okthermistor)

CMPSAFE

Discrete, 24VAC

T56- SET

Analog (1Okthermistor)

FSD

Discrete, 24VAC

LOOP- PWR

Analog, 24VDC

SPS

Discrete, 24VAC

TB1 TERMINAL

IAQ-SEN

FILTER

IAQ- COM/OAQ-

Analog, 4-20mA
Discrete, 24VAC

COM/RH-

COM

Analog, 4-20mA

CCN + (RED)

Digital,, 5VDC

OAQ-SEN/RH-SEN

Analog, 4-20mA

CCN Gnd (WriT)

AUX OUT(Power Exhaust)

CCN - (BLK)

LEGEND:
T55
T56
CCN
CMPSAFE

Sensor

FSD -

Space Temperature Sensor
Carrier Comfort Network (communication

IAQ -

Indoor Air Quality (C02)

OAQ-

Outdoor Air Quality (C02)

bus)

Safety

Dirty Filter Switch

SFS -

Table 4 - Thermostat
TB1 TERMINAL

24VAC

Digital, 5VDC

Space Temperature Sensor

Compressor

FILTER

Digital, 5VDC
(Output)Discrete

Fire Shutdown

Relative Humidity
Supply Fan Status

Mode

FIELD CONNECTION

RAT SEN

INPUT
Analog

(10k thermistor)

Discrete,
Analog

SIGNAL

24VAC

(1Ok thermistor)

Discrete,

24VAC

5
6

LOOP-

IAQ-

COM/OAQ-

COM/RH-COM

OAQ - SEN/RH

Analog,

AUX OUT (Power
CCN -

- SEN

Analog,

Carrier Comfort Network (communication
Thermostat Fan

24VAC
4- 20mA

4- 20mA

Digital, 5VDC

Exhaust)

(Output)

(BLK)

Discrete

Digital, 5VDC

LEGEND:
CCN

24VAC
4-20mA

Digital, 5VDC

CCN Gnd (WriT)

24VDC

Discrete,

CCN + (RED)

24VAC

Analog,

Discrete,

IAQ-SEN

10
11

PWR

bus)

Relative Humidity

Thermostat

Heat Stage 1
Heat Stage 2

IAQ

Indoor Air Quality (C02)

Thermostat

OAQ

Outdoor Air Quality (C02)

Thermostat Cool Stage 1

RAT

Return Air Temperature

Thermostat Cool Stage 2

24VAC

If the 48TC
unit has an economizer
system
and
free-cooling
operation
is required,
a sensor representing
Return
Air
Temperature
must
also
be
connected
(field-supplied
and installed). This sensor may be a T-55
Space Sensor (see Fig. 40) installed in the space or in the
return duct, or it may be sensor PNO 33ZCSENSAT,
installed in the return duct. Connect this sensor to TBI-1
and TB1-3

Return Air Enthalpy
Sensor I
Mount the return-air
enthalpy sensor (33CSENTSEN)
in the return-air
section
of the economizer.
The return air sensor is wired to the
enthalpy

controller

(33CSENTHSW).

See Fig. 46.

per Fig. 41.

24V

- 4-20
Main

Configure the unit for Thermostat Mode I Connect to the
CCN bus using a CCN service tool and navigate to
PremierLink Configuration screen for Operating Mode.
Default setting is Sensor Mode (value 1). Change the
value to 0 to reconfigure the controller for Thermostat
Mode.

+ VDC
Out

When the PremierLink is configured for Thermostat
Mode, these functions are not available: Fire Shutdown
(FSD), Remote Occupied (RMTOCC), Compressor Safety
(CMPSAFE), Supply Fan Status (SFS), and Filter Pressure
Switch (FILTER).

RED

--'_ECONO

GND T|

BLK

.JMOTOR

LOW 1-

GRA _

+ 24-36
VDC In
- 4-20 Main
Out

C09027

Fig. 46 - Outside

Economizer
Outdoor

controls i

Air Enthalpy

Control

(PNO 33CSENTHSW)

To wire
following:

GRA_

'_ECONO
,JMOTOR

E__

ECON
CTB

Factory Wiring Harness

return

air

enthalpy

Air Enthalpy

sensor,

Sensor

perform

the

1. Use a 2-conductor,
18 or 20 AWG, twisted pair cable
to connect the return air enthalpy sensor to the enthalpy controller.
2. Connect the field-supplied
RED wire to (+) spade
connector
on the return air enthalpy
sensor and the
(+) terminal on the enthalpy
controller.
Connect the
BLK wire to (-) spade connector on the return air enthalpy sensor and the (-) terminal
on the enthalpy
controller.

Enthalpy
Switch
= RED
BLK

the

and Return
Wiring

Indoor Air Quality (CO2 sensor) I The indoor air quality
sensor accessory monitors space carbon dioxide (CO2)
levels. This information is used to monitor IAQ levels.
Several types of sensors are available, for wall mounting
in the space or in return duct, with and without LCD
display, and in combination with space temperature
sensors. Sensors use infrared technology to measure the
levels of CO2 present in the space air.

C09026

Fig. 45 - Enthalpy Switch (33CSENTHSW)

Connections

Locate the enthalpy control in the economizer
next to the
Actuator
Motor. Locate two GRA leads in the factory
harness and connect the gray lead labeled "ESL" to the
terminal
labeled
"LOW".
See Fig. 45. Connect
the
enthalpy
control
power input terminals
to economizer
actuator
power leads RED (connect
to 24V) and BLK
(connect to GND).
The outdoor enthalpy
enthalpy controller.

changeover

setpoint

is set

The CO2 sensors are all factory set for a range of 0 to
2000 ppm and a linear mA output of 4 to 20. Refer to the
instructions supplied with the CO2 sensor for electrical
requirements and terminal locations. See Fig. 47 for
typical CO2 sensor wiring schematic.

at the

Differential
Enthalpy
Control
I
Differential
enthalpy
control is provided by sensing and comparing
the outside
air and return air enthalpy conditions.
Install the outdoor
air enthalpy control as described above. Add and install a
return air enthalpy sensor.
25

Refer to Form 33CS-58SI,
Start-up, and Configuration
configuration information

PremierLink
Instructions,

Installation,
for detailed

Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus
weatherproof enclosure) -- The outdoor air CO2 sensor is
designed to monitor carbon dioxide (CO2) levels in the
outside ventilation air and interface with the ventilation
damper in an HVAC system. The OAQ sensor is packaged
with an outdoor cover. See Fig. 49. The outdoor air CO2
sensor must be located in the economizer outside air hood.

Q0q0VDC
® SIG COM
® 4-20mA
NC '} ALARM
COM_, RELAY
NO J CONTACTS

_1--

41/4"

_4_---2

J31

33/4"

......................
t_

......

--_b,,]

87654321

3.5"

........

--,--

O
©
C08635

Fig. 47 - Indoor/Outdoor
Air Quality
(33ZCSENCO2)
- Typical Wiring

(CO2)

61t2"

Sensor

Diagram

7 u

COVER REMOVED

SIDE VIEW
C07135

Do not mount the IAQ sensor in drafty areas such as near
supply ducts, open windows,
fans, or over heat sources.
Allow at least 3 ft (0.9 m) between
the sensor and any
corner. Avoid mounting the sensor where it is influenced
by the supply air; the sensor gives inaccurate
readings if
the supply air is blown directly onto the sensor or if the
supply air does not have a chance to mix with the room air
before it is drawn into the return airstream.
Wiring

the Indoor

Air Quality

Sensor

For each sensor, use two 2-conductor
18 AWG (American
Wire Gage) twisted-pair
cables (unshielded)
to connect
the separate isolated 24 vac power source to the sensor
and to connect the sensor to the control board terminals.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals
on the
sensor. See Fig. 47. Connect
the 4-20 mA terminal
to
terminal
TB1-9
and connect the SIG COM terminal to
terminal

TBI-ll.

Fig. 49 - Outdoor

Air Quality

Sensor

Cover

Wiring the Outdoor Air CO2 Sensor -- A dedicated power
supply is required for this sensor. A two-wire cable is
required to wire the dedicated power supply for the sensor.
The two wires should be connected to the power supply
and terminals 1 and 2.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals
on the
OAQ sensor. See Fig. 47. Connect
the 4 to 20 mA
terminal to the TB1-13 terminal of the 48TC. Connect the
SIG COM terminal to the TBI-ll
terminal of the 48TC.
See Fig. 50.

OAQ Sensor/RH

Sensor
TB1

TB1

See Fig. 48.

24 VAC
C08275

IAQ Sensor
TB1

TB1

[]

24 VAC
C08636

Fig. 48 - Indoor

CO2 Sensor
Connections

(33ZCSENCO2)

Fig. 50 - Outdoor

CO 2 Sensor

Connections

Smoke Detector/Fire
Shutdown (FSD) -- This function is
available
only when
PremierLink
is configured
for
(Space)
Sensor
Mode.
The unit is factory-wired
for
PremierLink
FSD
operation
when
PremierLink
is
factory-installed.

Fan (Pressure) Switch (NO, close on rise in pressure)

On 48TC units equipped
with factory-installed
Smoke
Detector(s),
the smoke detector controller implements
the
unit shutdown through its NC contact set connected to the
unit's CTB input. The FSD function
is initiated via the
smoke detector's Alarm NO contact set. The PremierLink
communicates
the smoke detector's
CCN building
control.
See Fig.
wiring schematic.

tripped
39, the

CTB
Thermostat

status to the
PremierLink

L@o-

control

can monitor

[]TB1

--0

C08118

Fig. 52 - PremierLink Wiring Fan Pressure Switch
Connection

Filter Status Switch I This function is available only
when PremierLink is configured for (Space) Sensor Mode.
PremierLink

[]

return filter status in two

ways:
By monitoring
a field-supplied/installed
pressure switch or via supply fan runtime hours.

filter

Using switch input: Install the dirty
according
to switch
manufacturer's
measure
pressure
drop across the
Connect one side of the switch's NO
THERMOSTAT-R
terminal. Connect

filter pressure switch
instructions,
to
unit's
return filters.
contact set to CTB's
the other side of the

NO contact set to TBI-10.
at the switch. See Fig. 51.

for Dirty Filter

Setpoint

is set

Remote
Occupied
Switch I
The PremierLink
control
permits
a remote
timeclock
to override
the control's
on-board
occupancy
schedule
and place the unit into
Occupied mode. This function may also provide a "Door
Switch" time delay function
that will terminate
cooling
and heating functions after a 2-20 minute delay.
Connect one side of the NO contact set on the timeclock
to CTB's THERMOSTAT-R
terminal.
Connect the other
side of the timeclock contact to the unit's TB1-2 terminal.

Remote Occupied

Filter Switch (NO, close on rising pressure (high drop))
I

CTB
Thermostat

c----o

Time Clock T

[]
TB1
_

PL
@
C08214

--o

TB1

427

Fig. 53 - PremierLink
Refer

C08216

Fig. 51 - PremierLink
When

the filter

switch's

Filter

Switch

NO contact

pressure drop increases (indicating
input signal to PremierLink
causes
read "DIRTY".

Connection

set closes

as filter

dirt-laden
filters), the
the filter status point to

33CS-58SI

configuring
the
timer function.

PremierLink

Remote

for additional
control

Occupied
information

for

Door

Install the differential
pressure
switch in the supply fan
section according
to switch manufacturer's
instructions.
Arrange the switch contact to be open on no flow and to
close as pressure rises indicating fan operation.
Connect one side of the switch's NO contact set to CTB's
THERMOSTAT-R
terminal. Connect the other side of the
for Supply

Switch

Power Exhaust

33CS-58SI
for
Configuration

Supply Fan Status Switch I The PremierLink
control can
monitor
supply
fan
operation
through
a
field-supplied/installed
differential
pressure switch. This
sequence
will prevent
(or interrupt)
operation
of unit
cooling,
heating
and economizer
functions
until the
pressure
switch
contacts
are closed
indicating
proper
supply fan operation.

Power Exhaust (output) - Connect the accessory Power
Exhaust contactor coils(s) per Fig. 54.

TB1

Using Filter Timer Hours: Refer to Form
instructions
on using
the PremierLink
screens and on unit alarm sequence.

NO contact set to TB1-8.
Setpoint
is set at the switch. See Fig. 52.

to Form

Wiring

OTB
D
THERMOSTAT

_TAN
L

GRA

D
C08120

Fig. 54 - PremierLink
Power
Connection
CCN Communication

Bus I

Exhaust

The PremierLink

Output

controller

connects
to the bus in a daisy
chain
arrangement.
Negative
pins on each component
must be connected
to
respective
negative pins, and likewise,
positive pins on
each component
must be connected
to respective
positive
pins. The controller signal pins must be wired to the signal
ground pins. Wiring connections
for CCN must be made
at the 3-pin plug.

Fan Status

At any baud (9600, 19200, 38400 baud), the number of
controllers is limited to 239 devices maximum.
Bus length
may not exceed 4000 It, with no more than 60 total
devices on any 1000-ft section. Optically isolated RS-485
repeaters are required every 1000 ft.
NOTE:

Carrier

device

COMMUNICATION

default
BUS

Connecting

NOTE:
When connecting
the communication
bus cable,
a color
code
system
for
the
entire
network
is
recommended
to simplify installation
and checkout.
See
Table 6 for the recommended
color code.

is 9600 band.

WIRE

Table

SPECIFICATIONS

6 - Color

Code Recommendations

The CCN Communication
Bus wiring is field-supplied
and field-installed.
It consists
of shielded
3-conductor
cable with drain (ground) wire. The cable selected must
be identical to the CCN Communication
Bus wire used for
the entire network.
See Table 5 for recommended

CCN bus:

SIGNAL TYPE

CCN BUS WIRE
COLOR

CCN PLUG PIN
NUMBER

Red

Ground

White

Black

cable.

Table 5 - Recommended
MANUFACTURER

Cables
CABLE

Alpha

Connect
TBI-12
(typically
the CCN
terminal.

PART NO.

2413 or 5463

American

A22503

Belden

8772

Columbia

02525

the CCN (+) lead (typically
RED) to the unit's
terminal.
Connect
the CCN
(ground)
lead
WHT) to the unit's TBI-14
terminal. Connect
(-) lead (typically
BLK) to the unit's TBI-16
See Fig. 55.

CCN Bus
TB1

NOTE:

Conductors

and drain

wire must

be at least

+ (RED)

AWG, stranded, and 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.
Do not run communication
wire in the same conduit as or next to any AC voltage
wiring.

"D
TB1

GND (WHT)

'[l"_m
TB1

C08276

Fig. 55 - PremierLink

The communication
bus shields must be tied together at
each system element. If the communication
bus is entirely
within one building, the resulting
continuous
shield must
be connected
to ground at only one single point. If the
communication
bus cable exits from one building
and
enters another building,
the shields must be connected
to
the grounds at a lightning suppressor in each building (one
point only).

CCN Bus Connections

RTU-MP control system --

The RTU-MP
control is factory-mounted
in the 48TC
unit's
main control box, to the left of the CTB. See

The RTU-MP
controller,
see Fig. 56, provides expanded
stand-alone
operation
of the
HVAC
system
plus
connection
and control
through
communication
with
several
Building
Automation
Systems
(BAS)
through
popular
third-party
network
systems.
The
available
network
systems
are BACnet
MP/TR
Modbus
and
Johnson
J2. Communication
with LonWorks
is also

Fig. 57. Factory wiring is completed
through harnesses
connected
to the CTB. Field connections
for RTU-MP
sensors will be made at the Phoenix connectors
on the
RTU-MP
board. The factory-installed
RTU-MP
control
includes
the supply-air
temperature
(SAT) sensor. The
outdoor air temperature
(OAT) sensor is included
in the
FIOP/accessory
EconoMi$er2
package.

possible by adding an accessory
interface
card to the
RTU-MP.
Selection
of the communication
protocol
and
baud rate are made at on-board
DIP switches.

Refer to Table 7, RTU-MP Controller
Inputs and Outputs
for locations of all connections
to the RTU-MP board.

J1
Board Power

o>
"-

(AO-I)
0-10VDC

or_ =

DO_

--_J

(H)

(Humidistat)
DO-7 (Spare)
DO=8 (PE)
Power Exhaust)

Jll

J14

Protocol Selector

*Remove

Input j0

both for 0-SV InpuL11

(T_

(T-55 Accy)

BACnet

Accy)

or Net
Comm
C0712g

Fig. 56 - RTU-MP

]

Multi-Protocol

Control Board

RTU-MP
FIOP
+

DDC

I_c_ss_S-_
:

TERMINAL BOARD

UNIT 0_L¥
C09299

Fig. 57 - 48TC

Control

Box Component
29

Locations

illl

iii

C09301

Fig. 58 - RTU-MP

System Control Wiring Diagram
3O

Table 7 - RTU-MP Controller Inputs and Outputs
POINT

NAME

BACnet OBJECT
NAME

Sensor

sptsens

TYPE

OF I/O

CONNECTION
NUMBERS

INPUTS
Space

Temperature

Supply

Air Temperature

Local Outside

Air Temperature

Space

Temperature

Indoor

Air Quality

Outdoor
Safety

Offset

Sensor

Pot

Air Quality
Chain Feedback

Compressor

AI (10K Thermistor)

J20-1,2

AI (10K Thermistor)

J2-1,2

oatsens

AI (10K Thermistor)

J2-3,

sptopot

AI (lOOK Potentiometer)

sat

iaq

AI (4-20

ma)

J4-2,

oaq

AI (4-20

ma)

J4-5,

safety

Safety

J20-3

DI (24 VAC)

J1-9

compstat

DI (24 VAC)

J1-2

Fire Shutdown

firedown

DI (24 VAC)

J1 - 10

Enthatpy

enthatpy

DI (24 VAC)

J2-6,

DI (24 VAC)

J5-7,

Switch

Humidistat

Input

Status

humstat
CONFIGURABLE

Space

Relative

Humidity

Outside

Air Relative

Supply

Fan Status

Humidity

Filter Status
Remote

Occupancy

Input

INPUTS*

sprh

AI (4-20

ma)

oarh

AI (4-20

ma)

fanstat

DI (24 VAC)

filtstat

DI (24 VAC)

remocc

J4-2,3

or J4-5,6

J5-1,2
or J5-3,4
J5 5,6 or J5-7,8

DI (24 VAC)
OUTPUTS

Economizer
Supply

Commanded

Position

Fan Relay State

econocmd

4-20ma

J2-5

DO Relay (24VAC,

1A)

J1-4

Compressor

1 Relay State

comp_l

DO Relay (24VAC,

1A)

J1-8

Compressor

2 Relay State

comp_2

DO Relay (24VAC,

1A)

J1-7

Heat Stage

1 Relay State

heat_l

DO Relay (24VAC,

1A)

J1-6

Heat Stage

2 Relay State

heat_2

DO Relay (24VAC,

1A)

J1-5

aux_2

DO Relay (24VAC,

1A)

DO Relay

1A)

Power

Exhaust

Dehumidification

Relay State
Relay State

humizer

(24VAC,

J11-3
J11-7,

LEGEND
AI Analog Input
AO Analog Output
DI Discrete Input
DO Discrete Output
* These inputs (if installed) take the place of the default input on the specific channel according
Parallel pins J5-1 = J2-6, J5-3 = J1-10, J5-5 = J1-2 are used for field-installation.

The RTU-MP
controller
space sensor. A standard
the RTU-MP system.

requires
thermostat

the use of a Carrier
cannot be used with

Supply
Air
Temperature
(SAT)
Sensor
On
FIOP-equipped
48TC unit, the unit is supplied with a
supply-air
temperature (SAT) sensor (33ZCSENSAT).
This sensor is a tubular probe type, approx 6-inches (12.7
mm) in length. It is a nominal 10-k ohm thermistor.
The SAT is factory-wired.
The SAT probe is wire-tied
to
the supply-air
opening (on the horizontal opening end) in
its shipping position.
Remove the sensor for installation.
Re-position
the sensor in the flange of the supply-air
opening or in the supply air duct (as required by local
codes). Drill or punch a 1/2-in. hole in the flange or duct.
Use two field-supplied,
self-drilling
screws to secure the
sensor probe in a horizontal
orientation.
See Fig. 38.
Outdoor Air Temperature
(OAT) Sensor - The OAT is
factory-mounted
in
the
EconoMi$er2
(FIOP
or

to schematic.

accessory). It is a nominal 10k ohm thermistor attached to
an eyelet mounting ring.
EconoMi$er2

The

RTU-MP

control

used

with

EconoMiSer2
(option
or accessory)
for outdoor
air
management.
The damper position is controlled
directly
by the RTU-MP
control;
EconoMi$er2
has no internal
logic device.
Outdoor air management
functions
field-installation
of these accessory
Enthalpy

control

(outdoor

can be enhanced
control devices:

air or differential

with

sensors)

Space CO2 sensor
Outdoor

air CO2 sensor

Field
Connections
Field connections
for accessory
sensors and input devices are made the RTU-MR at plugs
J1, J2, J4, J5, Jll and J20. All field control wiring that
connects
to the RTU-MP
must be routed through
the
raceway
built into the corner post as shown in Fig. 29.
31

8The
raceway
provides
the UL required
clearance
between high- and low-voltage
wiring. Pass the control
wires through the hole provided in the corner post, then
feed the wires thorough
the raceway
to the RTU-MR
Connect to the wires to the removable Phoenix connectors
and then reconnect the connectors to the board.

Space Temperature

terminal (BRN) to J20-2. Connect the SET terminal (STO
or BLK) to J20-3.
BRN (COM)

(SPT) Sensors

A field-supplied
Carrier space temperature sensor is
required with the RTU-MP to monitor space temperature.
There are 3 sensors available for this application:
• 33ZCT55SPT,
button

space temperature

• 33ZCT56SPT,

space temperature

button

and setpoint

• 33ZCT59SPT,
(liquid
setpoint

crystal

I
I
I

SET

SEN

OPB

COM-

iooo
/

screen,

I
I

button,

sensor with LCD
override

PWR+

ooo

sensor with override
...........

space temperature

SENSOR
WIRING

BLU (SPT)

sensor with override

POWER
WIRING

24 VAC

and

NOTE: Must use a separate isolated transformer.

adjustment

C07132

Use 20 gauge wire to connect the sensor to the controller.
The wire is suitable for distances of up to 500 ft. Use a
three-conductor
shielded cable for the sensor and setpoint
adjustment
connections.
If the
setpoint
adjustment
(slidebar)
is not required,
then an unshielded,
18 or 20
gauge, two-conductor,
twisted pair cable may be used.
Connect
T-55 - See Fig. 40 for typical
connections.
Connect
the
T-55
SEN
RTU-MP

adjustment

display)

BLK (STO)

I
I

J20-1

and J20-2.

T-55 internal
terminals
to

See Fig. 59.

C08460

Fig. 59 - RTU-MP

T-55

Sensor

Connections

Connect T-56
See Fig. 42 for T-56 internal
connections. Install a jumper between SEN and SET
terminals as illustrated. Connect T-56 terminals to
RTU-MP J20-1, J20-2 and J20-3 per Fig. 60.

Fig. 61 - Space

Economizer
Outdoor

Temperature
Sensor
(33ZCT59SPT)

Typical

Wiring

controls --

Air Enthalpy

Control

(PNO 33CSENTHSW)

The enthalpy control (33CSENTHSW)
is available
as a
field-installed
accessory to be used with the EconoMi$er2
damper system. The outdoor air enthalpy sensor is part of
the
enthalpy
control.
(The
separate
field-installed
accessory
return air enthalpy
sensor (33CSENTSEN)
is
required for differential
enthalpy control. See Fig. 45.)
Locate the enthalpy control in the economizer
next to the
Actuator
Motor. Locate two GRA leads in the factory
harness and connect the gray lead labeled "ESL" to the
terminal
labeled
"LOW".
See Fig. 45. Connect
the
enthalpy
control power
input terminals
to economizer
actuator
power leads RED (connect
to 24V) and BLK
(connect to GND).
The outdoor
enthalpy
enthalpy controller.

changeover

setpoint

is set at the

Differential
Enthalpy
Control
-- Differential
enthalpy
control is provided by sensing and comparing
the outside
air and return air enthalpy conditions.
Install the outdoor
air enthalpy control as described above. Add and install a
return air enthalpy sensor.
"i,_---Jumper

Return Air Enthalpy
Sensor -- Mount the return-air
enthalpy sensor (33CSENTSEN)
in the return-air
section
of the economizer.
The return air sensor is wired to the
enthalpy
C08461

Fig. 60 - RTU-MP
Connect
T-59
- The
separate, isolated power
for internal connections
terminal

(BLU)

T-56

Sensor

Connections

To wire
following:

J20-1.

Connect

the

(33CSENTHSW).

return

air

enthalpy

See Fig. 46.
sensor,

perform

the

1. Use a 2-conductor,
18 or 20 AWG, twisted pair cable
to connect the return air enthalpy sensor to the enthalpy controller.

T-59
space sensor
requires
a
supply of 24 VAC. See Fig. 61
at the T-59. Connect
the SEN

to RTU-MP

controller

2. Connect the field-supplied
RED wire to (+) spade
connector
on the return air enthalpy
sensor and the

COM

(+) terminal
on the enthalpy controller.
Connect the
BLK wire to (-) spade connector on the return air enthalpy sensor and the (-) terminal
on the enthalpy
controller.

Indoor Air Quality (CO 2 sensor) -- The indoor air quality
sensor accessory monitors space carbon dioxide (CO2)
levels. This information is used to monitor IAQ levels.
Several types of sensors are available, for wall mounting
in the space or in return duct, with and without LCD
display, and in combination with space temperature
sensors. Sensors use infrared technology to measure the
levels of CO2 present in the space air.
The CO2 sensors are all factory set for a range of 0 to
2000 ppm and a linear mA output of 4 to 20. Refer to the
instructions supplied with the CO2 sensor for electrical
requirements and terminal locations. See Fig. 47 for
typical CO2 sensor wiring schematic.

with an outdoor cover. See Fig. 49. The outdoor air CO2
sensor must be located in the economizer outside air hood.
Wiring the Outdoor Air CO2 Sensor -- A dedicated power
supply is required for this sensor. A two-wire cable is
required to wire the dedicated power supply for the sensor.
The two wires should be connected to the power supply
and terminals 1 and 2.
To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals
on the
OAQ sensor. See Fig. 47. Connect
the 4 to 20 mA
terminal
to RTU-MP
J4-5.
Connect
the SIG COM
terminal to RTU-MP J4-6.

OAQ Sensor/Fill Sensor

To accurately monitor the quality of the air in the
conditioned air space, locate the sensor near a return-air
grille (if present) so it senses the concentration of CO2
leaving the space. The sensor should be mounted in a
location to avoid direct breath contact.
Do not mount the IAQ sensor in drafty areas such as near
supply ducts, open windows,
fans, or over heat sources.
Allow at least 3 ft (0.9 m) between
the sensor and any
corner. Avoid mounting the sensor where it is influenced
by the supply air; the sensor gives inaccurate
readings if
the supply air is blown directly onto the sensor or if the
supply air does not have a chance to mix with the room air
before it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor --

24 VAC
C08463

Fig. 63 - RTU-MP / Outdoor CO 2 Sensor
(33ZCSENCO2) Connections
On 48TC units equipped
with factory-installed
Smoke
Detector(s),
the smoke detector controller implements
the
unit shutdown through its NC contact set connected
to the
unit's CTB input. The FSD function
is initiated via the
smoke detector's
Alarm NO contact set. The RTU-MP
controller
communicates
the smoke
detector's
status to the BAS building
control.
See Fig.
RTU-MP System Control wiring schematic.

tripped
58, the

The
Fire
Shutdown
Switch
configuration,
MENU _Config-_Inputs-+input
5,
identifies
the
normally
open status of this input when there is no fire
alarm.

To connect the sensor to the control, identify the positive
(4 to 20 mA) and ground (SIG COM) terminals on the
sensor. See Fig. 47. Connect the 4-20 mA terminal to
RTU-MP J4-2 and connect the SIG COM terminal to
RTU-MP J4-3. See Fig. 62.

Connecting

IAQ Sensor

24 VAC
C08462

Fig. 62 - RTU-MP / Indoor CO 2 Sensor
(33ZCSENCO2) Connections
Outdoor Air Quality Sensor (PNO 33ZCSENCO2 plus
weatherproof enclosure) -- The outdoor air CO2 sensor is
designed to monitor carbon dioxide (CO2) levels in the
outside ventilation air and interface with the ventilation
damper in an HVAC system. The OAQ sensor is packaged

Filter

Discrete

Inputs

Status

The filter status accessory
is a field-installed
accessory.
This accessory
detects plugged
filters. When installing
this accessory, the unit must be configured
for filter status
by setting MENU--_onfig-_Inputs-,qnput
3, 5, 8, or 9
to Filter Status and normally
open (N/O) or normally
closed (N/C). Input 8 or 9 is recommended
for easy of
installation.
Refer to Fig. 56 and Fig. 58 for wire
terminations
at J5.

Fan Status
The fan status accessory is a field-installed
accessory.
This accessory detects when the indoor fan is blowing air.
When installing this accessory, the unit must be
configured
for
fan
status
by
setting
MENU-_onfig-_Inputs-+input
3, 5, 8, or 9 to Fan
Status and normally open (N/O) or normally closed (N/C).
Input 8 or 9 is recommended for easy of installation. Refer
to Fig. 56 and Fig. 58 for wire terminations at J5.
33

Remote

Occupancy

Communication

The remote
occupancy
accessory
is a field-installed
accessory. This accessory overrides the unoccupied
mode
and puts the unit in occupied mode. When installing
this
accessory,
the unit must be configured
for remote
occupancy
by setting MENU_Config-Hnputs--,input
3,
5, 8, or 9 to Remote Occupancy
and normally open (N/O)
or normally closed (N/C).
Also set MENU--_Schedules--_occupancy
source
to DI
on/off.
Input
8 or 9 is recommended
for easy of
installation.
Refer to Fig. 56 and Table 7 for wire
terminations
at J5.

Power Exhaust

(output)

Connect the accessory Power Exhaust contactor coil(s) per
Fig. 64.

Power Exhaust

CTB
THERMOSTAT
GRA

- Protocols

General
Protocols
are the communication
languages
spoken by
control
devices.
The main purpose of a protocol
is to
communicate
information
in the most efficient
method
possible.
Different
protocols
exist to provide
different
kinds of information
for different applications.
In the BAS
application,
many different protocols are used, depending
on manufacturer.
Protocols do not change the function of
a controller; just make the front end user different.
The RTU-MP can be set to communicate
on four different
protocols:
BACnet, Modbus, N2, and LonWorks. Switch 3
(SW3) on the board is used to set protocol and baud rate.
Switches
1 and 2 (SWl and SW2) are used to set the
board's network address. See Fig. 65 for the switch setting
per protocol. The 3rd party connection
to the RTU-MP is
through plug J19.
NOTE:
Power
switch settings.

TAN

Wiring

must be cycled

after changing

the SW1-3

Refer to the RTU-MP
3rd Part)' Integration
Guide for
more detailed information
on protocols,
3rd party wiring,
and networking.

C08464

Fig. 64 - RTU-MP

Power

Exhaust

Connections
SW3 Protocol Selection

PROTOCOL

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

BACnet MS/'FP
(Master)

Unused

OFF

Select Baud

Modbus
(Slave)

Unused

OFF

Select Baud

N2
(Slave)

Unused

OFF

LonWorks

Unused

OFF

NOT E:
DS = Dip Switch

C_a_
O_t_

BAOnet MS/TP SW6 example shown
Baud

_(
3&4_

S_ _ NSTP
[

Rate Selections

BAUD RATE

DS2

DS1

9600

OFF

19,200

OFF

38,400

OFF

76,800

Fig. 65 - RTU-MP

C07166

SW3 Dip Switch Settings

Local Access

Virtual

BACview

Virtual BACview
functions
as the

6 Handheld

The BACview 6 is a keypad/display
interface used to
connect to the RTU-MP to access the control information,
read sensor values, and test the RTU, see Fig. 66. This is
an accessory interface that does not come with the MP
controller and can only be used at the unit. Connect the
BACview 6 to the RTU-MP's J12 local access port. There
are 2 password protected levels in the display (User and
Admin). The user password is defaulted to 0000 but can
be changed. The Admin password is 1111 and cannot be
changed. There is a 10 minute auto logout if a screen is
idle. See Form 48-50H-T-2T, Appendix A for navigation
and screen content.

BACview

is a freeware
computer
program
BACview 6 Handheld.
The USB

that
Link

interface
(USB-L)
is required to connect a computer
to
the RTU-MP board. The link cable connects a USB port
to the J12 local access port. This program functions
and
operates identical to the handheld.

RTU-MP

Troubleshooting

Communication

LEDs

The LEDs indicate
if the controller
is speaking
to the
devices
on the network.
The LEDs
should
reflect
communication
traffic based on the baud rate set. The
higher

the baud rate the more solid the LEDs

will appear.

Port

PI
Protocol

Selector

RTU-MP
J12

Cable

P5
BACview s Loca| Access CaNe

C07170

Fig. 66 - BACview 6 Handheld

Connections

Table 8 - LEDs
The LEDs on the RTU-MP show the status of certain functions
If this LED is on...

Status

is...

Power

The RTU MP has power

The RTU MP is receiving

The RTU MP is transmitting

DO#

The digital

output

The Run and Error
If Run LED shows...

data from the network

segment

data over the network

segment

is active

LEDs indicate

control

module

and network

status

And Error LED shows...

Status

per second

Off

Normal

2 flashes

per second

2 flashes,
alternating

2 flashes

per second

3 flashes,
then off

Control

2 flashes

per second

4 flashes,
then pause

Two or more devices on this network
same ARC156 network address

2 flashes

per second

Exec halted after frequent
control programs
halted

5 flashes

per second

Exec start-up

5 flashes

per second

Off

Firmware

7 flashes

per second

7 flashes per second,
Run LED

2 flashes

14 flashes

per second

14 flashes
alternating

with Run LED

is...

Five minute auto-restart

alternating

with

per second,
with Run LED

module

after system

aborted,

system

errors

period

Boot is running
after brownout

Failure. Try the following solutions:
•
Turn the RTU-MP off, then on.
•
Format the RTU- MR
•
Download memory to the RTU-MR
•
Replace the RTU- MR

NOTE:
Refer to Form 48-50H-T-2T
for complete
configuration
of RTU-ME
operating
sequences
and
troubleshooting
information.
Refer to RTU-MP
3rd Party
Integration
Guide
for details
on configuration
and
troubleshooting
of connected
networks.
Have a copy of
these manuals available at unit start-up.

Boot is running

in progress,

recovery

have the

Brownout

error

has just been formatted

transfer

Ten second

delay

Step 13 -- Humidi-MiZer
Space RH Controller
TM

The Humidi-MiZer
dehumidification
system requires
a
field-supplied
and -installed
space relative
humidity
control device. This device may be a separate humidistat
control (contact closes on rise in space RH above control
setpoint) or a combination
thermostat-humidistat
control
device such as Carrier's
EDGE (n_Pro Thermidistat
with
isolated
contact
set for dehumidification
control.
The
humidistat
temperature
PermierLink
To connect
1. Route
plied)
post.

is normally
control
is
control).

L:IT
LL

used in applications
where
a
already
provided
(units with

the Carrier

humidistat

(HL38MG029):

the humidistat
2-conductor
through
the hole provided

C09295

cable (field-supin the unit corner

Fig. 67 - Accessory

2. Feed wires through the raceway build into the corner
post (see Fig. 29) to the 24-v barrier located on the
left side of the control box. The raceway provides the
UL-required
clearance
between
high-voltage
and
low-voltage
wiring.
3. Use wire nuts to connect
humidistat
cable to two
PINK leads
Fig. 69.
To connect
1. Route

E-31_o

in the

low-voltage

the Thermidistat
the Thermidistat

cable (field-supplied)
the unit corner post.

wiring

as shown

the hole

provided

Humidistat

actualtemp

device (33CS2PPRH-01):
multi-conductor
thermostat
through

Field-Installed

outside temp

in
P _mU

2. Feed wires through the raceway build into the corner
post (see Fig. 29) to the 24-v barrier located on the
left side of the control box. The raceway provides the
UL-required
clearance
between
high-voltage
and
low-voltage
wiring.
3. The Thermidistat
has dry contacts
at terminals
DI
and D2 for dehumidification
operation
(see Fig. 70).
The dry contacts
must be wired
between
CTB
terminal R and the PINK lead to the LTLO switch

C09296

Fig. 68 - EDGE Pro Thermidistat

with field-supplied
wire nuts. Refer to the installation
instructions
included
with
the
Carrier
Edge
Thermidistat
device (Form 33CS-65SI
or latest) for
more information.

r,_m

WIRING

:i....
r

(PH

I
OL}

CLOlTERMBB

__
CONTROL

,_HT
i

P,4K

YEL
_LU

WH
_H

A
%

}
%

(}

C09297

Fig. 69 - Typical Humidi-MiZer

Adaptive

Dehumidification

System Humidistat

EDGE Pro THERMIDISTAT

....

O/W2/B
Y1

i......
I

W2
Wl

I
--

I
i___4__

Y1
--

HumidilMiZer

i
-i-

FlOP

THERMOSTAT

'i
i

LTLO
-

PNK -- --

7
_

PNI_

.....

I............................

V+
Vg

----

Q
Q
@
@
....

I
I

D1
D2

I
1

OAT
RRS
SRTN
HUM

....
....

]

I
I

I
q

Unit CTB
THERMOSTAT

Rc
....
Rh Q
Wl
....
G
....
Y2
.........

Wiring

<_1/'o
_

REHEAT
CONTROL

I......................
u__J
'

*Connection not required.
C09298

Fig. 70 - Typical

Rooftop

Unit with Humidi-MiZer
Adaptive Dehumidification
with EDGE Pro Thermidistat
Device
38

System

Table

----

NOM.
V-Ph-Hz

9 - Unit Wire/MOCP

POWER
IFM COMBUSTION
MOTOREXHAUST
TYPE FAN
FLA
FLA

- 60

3- 60

FLA

LRA

29.5

45.0

27.6

40.0

29.5

45.0

19.9

30.0

21.8

30.0

19.9

30.0

21.8

30.0

20.2

30.0

109

22.1

30.0

111

10.4

15.0

11.4

15.0

10.4

15.0

11.4

15.0

HIGH

10.9

15.0

11.9

15.0

STD

7.5

15.0

9.4

15.0

7.5

15.0

9.4

15.0

HIGH

7.6

15.0

9.5

15.0

STD

34.1

50.0

135

36.0

50.0

137

34.1

50.0

135

36.0

50.0

137

24.0

30.0

101

25.9

30.0

103

24.0

30.0

101

25.9

30.0

103

HIGH

24.6

30.0

119

26.2

30.0

121

STD

10.9

15.0

11.9

15.0

10.9

15.0

11.9

15.0

HIGH

11.4

15.0

12.4

15.0

STD

7.5

15.0

9.4

15.0

7.5

15.0

9.4

15.0

7.6

15.0

9.5

15.0

1.9

0.48

MED

0.48

STD
MED

460-6-60

575-6-60

1.9

0.25

MED

208/260-1

- 60

1.0

0.24

1.9

0.48

MED

1.9

STD
208/260-

3- 60

MED

0.48

1.9

It)

o
-k

O
460-6-60

MED

575-6-60

0.25

MED

1.0

0.24

1.9

HIGH

1Fuse or breaker
LEGEND:

Example:

DISC

Disconnect

FLA
CO
IFM

Full load amps
Convenient
outlet
Indoor fan motor

LRA
MCA
MOCP
PE

Locked rotor amps
Minimum circuit amps
Maximum over current protection
Power exhaust

UNPWR CO
NOTES:

Unpowered

v Q

convenient

Supply

voltage

is 260-3-60

BC = 231 v
AB = 224 v
AC = 226 v

681

(224 + 231 + 226)
=

Average Voltage =

outlet

1. In compliance with NEC requirements for multimotor and
combination load equipment (refer to NEC Articles 430 and
440), the overcurrent protective device for the unit shall be
fuse or HACR breaker. Canadian units may be fuse or circuit
breaker.
2. Unbalanced 3-Phase
Never operate a motor
voltage is greater than
termine the percentage

LRA

MOCP

MED

FLA

MCA

HIGH

-k

MOCP
40.0

STD
208/260-

Data
NO C.O. or UNPWRD C.O.
NO RE.
w/RE, (pwrd fr/unit)
DISC. SIZE
DISC. SIZE

27.6

STD
208/260-1

MCA

Sizing

Supply Voltage
where a phase imbalance in supply
2%. Use the following formula to deof voltage imbalance.

Determine

227

maximum

deviation

from

average

voltage.

(AB) 227 - 224 = 3 v
(BC) 261 - 227 = 4 v
(AC) 227- 226 = 1 v
Maximum
deviation
is 4 v.
Determine

percent

% Voltage

imbalance

of voltage

imbalance.
4

= 100

x
227

max voltage
% Voltage

imbalance

deviation

from

average

= 1.76%

voltage

= 1O0 x
average

voltage

This amount of phase imbalance
maximum allowable 2%.

is satisfactory as it is below the

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

Table 9 -- Unit Wire/MOCP
NOM.
V-Ph-Hz

COMBUSTION

IFM
TYPE

FAN MOTOR
FLA

Sizing

Data (cont)
NO C.O. or UNPWRD C.O.
NO RE.
w/RE, (pwrd fr/unit)
DISC. SIZE
DISC. SIZE

POWER

EXHAUST
FLA

MCA

MOCP

FLA

LRA

60.0

152

41.5

60.0

154

41.7

60.0

177

46.6

60.0

179

26.4

40.0

128

28.6

40.0

130

26.7

40.0

146

28.6

40.0

148

HIGH

29.0

40.0

172

30.9

45.0

174

-k

STD

12.8

20.0

16.8

20.0

13.6

20.0

14.6

20.0

HIGH

14.1

20.0

15.1

20.0

STD

10.0

15.0

11.9

15.0

10.9

15.0

12.8

15.0

HIGH

10.9

15.0

12.8

15.0

STD

30.9

45.0

159

32.8

50.0

161

208/260-1

- 60

1.9

0.48

MED
STD

208/260-

6- 60

460-6-60

0.48

MED

575-6-60

208/260-

MED

6- 60

460-6-60

1.9

0.25

MED

1.0

0.24

MED

1.9

0.48

33.2

50.0

185

35.1

50.0

187

HIGH

33.2

50.0

185

35.1

50.0

187

STD

15.8

25.0

16.8

25.0

16.6

25.0

17.6

25.0

17.6

25.0

102

18.6

25.0

103

12.1

15.0

14.0

20.0

12.9

20.0

14.8

20.0

12.9

20.0

14.8

20.0

MED

1.9

0.25

1.0

HIGH
STD
575-6-60

LRA

MCA

69.6

STD

FLA

MED

0.24

1.9

HIGH

1Fuse or breaker
LEGEND:

Example:

DISC

Disconnect

FLA
CO
IFM

Full load amps
Convenient
outlet
Indoor fan motor

LRA
MCA
MOCP
PE
UNPWR CO
NOTES:

Locked rotor amps
Minimum circuit amps
Maximum over current protection
Power exhaust
Unpowered convenient outlet

v Q

Supply

voltage

is 260-3-60

BC = 261 v
AB
AC == 224
226 vv

681

(224 + 231 + 226)
=

Average Voltage =

227

Determine
maximum
deviation
(AB) 227 - 224 = 3 v

2. Unbalanced 3-Phase
Never operate a motor
voltage is greater than
termine the percentage

Determine

percent

% Voltage

imbalance

Supply Voltage
where a phase imbalance in supply
2%. Use the following formula to deof voltage imbalance.

from

average

voltage.

(BC) 261 - 227 = 4 v
(AC) 227- 226 = 1 v
Maximum
deviation
is 4 v.
of voltage

imbalance.
4

= 100

x
227

max voltage
% Voltage

imbalance

deviation

from

average

voltage

= 1.76%

= 100 x
average

voltage

This amount of phase imbalance
maximum allowable 2%.

is satisfactory as it is below the

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

Table 9 -- Unit Wire/MOCP

Sizing

Data (cont)
w/PWRD C.O.

I--

NOM.
V-Ph-Hz

COMBUSTION

IFM
TYPE

FAN MOTOR
FLA

STD
208/230-1

- 60

POWER

EXHAUST
FLA

3- 60

575-

3- 60

208/230-1

- 60

3- 60

It)

?
460-

575-

3- 60

SIZE

MOCP
FLA

LRA

34.3

50.0

104

32.4

45.0

102

34.3

50.0

104

24.7

30.0

26.6

30.0

24.7

30.0

26.6

30.0

25.0

30.0

114

26.9

30.0

116

12.6

15.0

13.6

20.0

12.6

15.0

13.6

20.0

HIGH

13.1

15.0

14.1

20.0

STD

9.2

15.0

11.1

15.0

9.2

15.0

11.1

15.0

HIGH

9.3

15.0

11.2

15.0

STD

38.9

60.0

140

40.8

60.0

142

38.9

60.0

140

40.8

60.0

142

28.8

40.0

106

30.7

40.0

108

28.8

40.0

106

30.7

40.0

108

HIGH

29.1

40.0

124

31.0

40.0

126

STD

13.1

15.0

14.1

20.0

13.1

15.0

14.1

20.0

HIGH

13.6

20.0

14.6

20.0

STD

9.2

15.0

11.1

15.0

9.2

15.0

11.1

15.0

9.3

15.0

11.2

15.0

0.48

MED

1.9

MED

0.48

1.9

MED

0.25

MED

1.0

0.24

1.9

0.48

MED

1.9

MED

0.48

MED

1.9

0.25

MED

1.0

0.24

1.9

HIGH

1Fuse or breaker
LEGEND:
CO
DISC
FLA
IFM
LRA
MCA
MOCP
PE
UNPWR CO
NOTES:

LRA
102

STD
208/230-

FLA

fr/unit)
DISC.

MCA

MOCP

(pwrd

STD
460-

SIZE

45.0

HIGH

MCA

w/RE.

DISC.

32.4

STD
208/230-

NO RE.

Example:

Supply

voltage

Disconnect

AB = 224 v

Full
load amps
C°nvenient°utlet
Indoor fan motor
Locked

rotor

C QUS

convenient

(224 + 231 + 226)
protection

Average Voltage =

681
=
3

3
outlet

BC = 231 v
AC = 226 v

amps

Minimum
circuit amps
Maximum
over current
Power exhaust
Unpowered

is 230-3-60

Supply Voltage
where a phase imbalance in supply
2%. Use the following formula to deof voltage imbalance.

227

Determine
maximum
deviation
(AB) 227 - 224 = 3 v

from

average

voltage.

(BC) 231 - 227 = 4 v
(AC) 227- 226 = 1 v
Maximum
deviation
is 4 v.
Determine

percent

% Voltage

imbalance

of voltage

imbalance.
4

= 100

x
227

max voltage
% Voltage

imbalance

deviation

from

average

voltage

= 1.76%

= 1O0 x
average

voltage

This amount of phase imbalance
maximum allowable 2%.

is satisfactory as it is below the

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

Table 9 -- Unit Wire/MOCP

Sizing

Data (cont)
w/PWRD C.O.

NOM.
V-Ph-Hz

COMBUSTION

IFM
TYPE

FAN MOTOR
FLA

POWER

EXHAUST
FLA

STD

NO RE.
MCA

w/RE.

DISC.

SIZE

FLA

LRA

fr/unit)
DISC.

MCA

MOCP

(pwrd

SIZE

MOCP
FLA

LRA

44.4

60.0

157

46.3

60.0

159

46.5

60.0

182

48.4

60.0

184

31.2

45.0

133

33.1

45.0

165

31.5

45.0

151

33.4

45.0

156

HIGH

36.8

45.0

177

35.7

50.0

179

-k

STD

15.0

20.0

16.0

20.0

15.5

20.0

16.5

20.0

HIGH

16.6

20.0

17.3

20.0

STD

11.7

15.0

13.6

20.0

12.6

15.0

14.5

20.0

HIGH

12.6

15.0

14.5

20.0

STD

35.7

50.0

164

37.6

50.0

166

208/260-1

- 60

1.9

0.48

MED
STD

208/260-

3- 60

460-6-60

575-6-60

208/260-

3- 60

460-6-60

MED

0.48

MED

1.9

0.25

MED

1.0

0.24

MED

1.9

0.48

38.0

50.0

190

39.9

50.0

192

HIGH

38.0

50.0

190

39.9

50.0

192

STD

18.0

25.0

19.0

25.0

18.8

25.0

19.8

25.0

19.8

25.0

104

20.8

60.0

105

13.8

20.0

15.7

20.0

14.6

20.0

16.5

20.0

14.6

20.0

16.5

20.0

MED

1.9

0.25

1.0

HIGH
STD
575-6-60

MED

0.24

1.9

HIGH

1Fuse or breaker
LEGEND:
CO
DISC
FLA
IFM
LRA
MCA
MOCP
PE
UNPWR CO
NOTES:

Example:

Supply

voltage

Disconnect

AB = 224 v

Full
load amps
C°nvenient°utlet
Indoor fan motor
Locked

rotor

C QUS

BC = 231 v
AC = 226 v

amps

Minimum
circuit amps
Maximum
over current
Power exhaust
Unpowered

is 260-3-60

convenient

(224 + 231 + 226)
protection

681
=

Average Voltage =

3
outlet
=

227

Determine
maximum
deviation
(AB) 227 - 224 = 3 v

2. Unbalanced 3-Phase
Never operate a motor
voltage is greater than
termine the percentage

Determine

percent

% Voltage

imbalance

Supply Voltage
where a phase imbalance in supply
2%. Use the following formula to deof voltage imbalance.

from

average

voltage.

(BC) 261 - 227 = 4 v
(AC) 227- 226 = 1 v
Maximum
deviation
is 4 v.
of voltage

imbalance.
4

= 100

x
227

max voltage
% Voltage

imbalance

deviation

from

average

voltage

= 1.76%

= 1O0 x
average

voltage

This amount of phase imbalance
maximum allowable 2%.

is satisfactory as it is below the

IMPORTANT: If the supply voltage phase imbalance is more than
2%, contact your local electric utility company immediately.

POTENTIOMETER
POWER
EXH
MINIMUM
POS
DCV MAX
DCV SET
ENTHALPY

ECONOMIZER
(FIOPIACCESSORY)

DEFAULTS
SETTINGS:
MIDDLE
FULLY
CLOSED
MIDDLE
MIDDLE
C SETTING

PNI<

VEO-

B'L,
I

(ACCESSORY)
REMOTE MIN
POSITION
POT

SET
EXH

1
2V

IOV

NIN
POS

0
.pNK_

TI T_

T-_--JOPE_

rF_SA_C_Ri
_
;

PL6-R

AO SENSOR

MAX
DCV

BLU F

"OAT
TE--'%7

E,_,ALPY
SERSOR
SO
BLK
RED

I OV

COOL
IRAT/ENTHALPY

SENSOF

c
BRN--

RED-ECONOMIZER
NOTES:
l
620 OHM,
l WATT
5% RESISTER
SHOULD
BE REMOVED
ONLY WHEN
USING
DIFFERENTIAL
ENTHALPY
OR DRY BULB
2
IF A SEPERATE
FIELD
SUPPLIED
24V TRANSFORMER
IS USED
FOR THE
IAO SENSOR
POWER SUPPLY,
IT CANNOT
HAVE THE SECONDARY
OF THE
TRANSFORMER
GROUNDED
3
FOR FIELD INSTALLED
REMOTE
MINIMUM
POSITION
POT,
REMOVE
CONTROL

BLACK
WIRE
JUMPER
MINIMUM
POSITION

BETWEEN
POT TO

--I

i
TAN
I

"GRA--

P AND Pl AND SET
THE MINIMUM
POSITION

"ORN-12 I

PWR
EXHAUST
ACCESSORY

(NOT

USED)

-<
_.J
C09302

Fig. 71 - EconoMi$er

Step 14 -- Adjust

Factory-Installed

IV Wiring

Options

EconoMi$er

Smoke
detector(s)
will be connected
Connections
Board,
at
terminals
Shutdown".
Cut jumper
JMP 3 when
unit.
EconoMi$er

IV Occupancy

at the Controls
marked
"Smoke
ready to energize

Differential
Outdoor

Smoke

accessories

Curb
Thru-base
connection
is set on curb)
LP conversion kit
Manual

outside

Two-Position

kit (must be installed

outside

before

unit

signal)

detector

(EconoMi$er

IV)

sensor
sensor

(Return

Air and/or

Supply Air)

Louvered

hail guard

Hood-type

hail guard

UV-C lamp kit
Phase monitor control

Pre-Start

and Start-Up

instructions

for information

This completes
the mechanical
installation
of the unit.
Refer to the unit's Service Manual for detailed Pre-Start

air damper
motorized

enthalpy

sensor

Refer to separate installation
on installing these accessories.

include:

external

DDC interface (PremierLink)
4-Inch filter tracks

If external occupancy
control is desired, connect a time
clock or remotely controlled
switch (closed for Occupied,
open for Unoccupied
sequence)
at terminals
marked
OCCUPANCY.
Cut jumper
JMP 2 to complete
the
installation.

Available

dry-bulb

Differential
enthalpy
CO2 sensor

Switch --

Accessories

control/for

Power Exhaust

Refer to Fig. 71 for general
EconoMi$er
IV wiring.
External
occupancy
control
is managed
through
a
connection on the Controls Connections
Board.

Step 15 -- Install

IV (with control)

EconoMi$er2
(without
Barometric
relief

Smoke Detectors --

air damper

and Start-Up

instructions.

2009 Carrier Corp. •

Manufacturer

reserves

7310 W. Morris St. •

the right to change,

Indianapolis,

IN 46231

at any time, specification8

and design8

Printed in U.S.A.
without

Edition

notice and without

Date:

06/09

obligations,

Catalog No:48TC-05SI
Replaces:

48T0-

lSl

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CARRIER Package Units(both Units Combined) Manual L0912106

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