Carrier 48TC Instruction Manual download pdf (Page 25)

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.

SW1

SEN

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-)

CCN COM

SENSOR WIRING

C08201

Fig. 39 -- T--55 Space Temperature Sensor Wiring

Connect T--55: See Fig. 39 for typical T--55 internal

connections. Connect the T--55 SEN terminals to TB1

terminals 1 and 3 (see Fig. 40).

SEN J6-7

J6-6

TB1 PL

SEN

C08212

Fig. 40 -- PremierLink T--55 Sensor

Connect T--56: See Fig. 41 for T--56 internal connections.

Install a jumper between SEN and SET terminals as

illustrated. Connect T--56 terminals to TB1 terminals 1, 3

and 5 (see Fig. 42).

SW1

SEN

SET

Cool Warm

BRN (GND)

BLU (SPT)

RED(+)

WHT(GND)

BLK(-)

CCN COM

SENSOR WIRING

JUMPER

TERMINALS

AS SHOWN

BLK

(T56)

‘

C08202

Fig. 41 -- T--56 Internal Connections

SEN J6-7

J6-6

TB1 PL

SEN

SET

Jumper

TB1

J6-5

SET

C08213

Fig. 42 -- PremierLink T--56 Sensor

Connect Thermostat —

A 7--wire thermostat connection requires a 24--v power

source and a common connection. Use the R and C

terminals on the CTB’s THERMOSTAT connection strip

for these. Connect the thermostat’s Y1, Y2, W1, W2 and

G terminals to PremierLink TB1 as shown in Fig. 43.

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.

GJ4-12

J4-10

J4-8

J4-6

J4-4

SPACE

THERMOSTAT

CTB

THERMOSTAT

TB1

CTB

THERMOSTAT

C08119

Fig. 43 -- Space Thermostat Connections

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. 39) 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 TB1--1

and TB1--3 per Fig. 40.

Configure the Unit for Thermostat Mode —

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.

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).

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Carrier 48TC Instruction Manual Page 25

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