Carrier 48HC installation instructions Space Sensors, Configure the Unit for Thermostat Mode

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.

	TB3	PL
SEN	1	J6-7
	TB3	PL
SEN	3	J6-6

Jumper

SET

SET 5 J6-5

Fig. 44 - PremierLink T-56 Sensor

Connect Thermostat —

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1	2	3	4	5	6	RED(+)
					WHT(GND)		CCN COM
						BLK(-)
			SEN
	SW1
					BRN (GND)		SENSOR WIRING
					BLU (SPT)

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Fig. 41 - T-55 Space Temperature Sensor Wiring

Connect T-55:See Fig. 41 for typical T-55 internal connections. Connect the T-55 SEN terminals to TB3 terminals 1 and 3 (see Fig. 42).

	TB3	PL
SEN	1	J6-7

SEN 3 J6-6

A7-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 TB3 as shown in Fig. 45.

If the 48HC unit is equipped with factory-installed smoke detector(s), disconnect the factory BLU lead at TB3-6 (Y2) before connecting the thermostat. Identify the BLU lead originating at CTB-DDC-1; disconnect at TB3-6 and tape off. Confirm that the second BLU lead at TB3-6 remains connected to PremierLink J4-8.

SPACECTB

THERMOSTAT THERMOSTAT

R R

TB3PL

G 2 J4-12

Y1 4 J4-10

Y2 6 J4-8

W1 8 J4-6

48HC

Fig. 42 - PremierLink T-55 Sensor

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W2 10 J4-4

C C CTB

Connect T-56:See Fig. 43 for T-56 internal connections. Install a jumper between SEN and SET terminals as illustrated. Connect T-56 terminals to TB3 terminals 1, 3 and 5 (see Fig. 44).

THERMOSTAT

Fig. 45 - Space Thermostat Connections

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1	2	3	4	5	6	RED(+)
					WHT(GND)		CCN COM
						BLK(-)
			SEN		SET
	SW1					BLK
						(T56)
					BRN (GND)		SENSOR WIRING
					BLU (SPT)
							JUMPER
							TERMINALS
							AS SHOWN

If the 48HC 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.

41)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 TB3-1 and TB3-3 per Fig. 42.

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.

Cool Warm

Fig. 43 - T-56 Internal Connections

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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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