T-56 Internal Connections, PremierLink T56 Sensor, Lctb

Connect T-56 - See Fig. 38 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. 39).

1	2	3	4	5	6	RED(+)
					WHT(GND)		CCN COM
						BLK(-)	CCN COM
						BLK(-)
			SEN		SET
	SW1					BLK
						BLK
						(T56)

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).

Economizer controls —

Outdoor Air Enthalpy Control (PNO HH57AC077) -

The enthalpy control (HH57AC077) is available as a

BRN (GND)

BLU (SPT)

50TC

Cool Warm

SENSOR WIRING

JUMPER

TERMINALS

AS SHOWN

C08202

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 (HH57AC078) is required for differential enthalpy control. See below.)

Locate the enthalpy control in the economizer hood. Locate two GRA leads in the factory harness and connect these leads to enthalpy control sensors 2 and 3. See Fig.

Fig. 38 - T-56 Internal Connections

	TB1	PL
SEN	1	J6-7
	TB1	PL
SEN	3	J6-6

Jumper

SET

SET 5 J6-5

C08213

Fig. 39 - PremierLink T56 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 LCTB’s THERMOSTAT connection strip for these. Connect the thermostat’s Y1, Y2, W1, W2 and G terminals to PremierLink TB1 as shown in Fig. 40.

If the 50TC 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 LCTB DDC-1; disconnect at TB1-6 and tape off. Confirm that the second BLU lead at TB1-6 remains connected to PremierLink J4-8.

If the 50TC 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. 36) 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. 37. Temperature-resistance characteristic is found in Table 5.

Configure the unit for Thermostat Mode — Connect to the CCN bus using a CCN service tool and navigate to

41.Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to TR) and BLK (connect to TR).

SPACELCTB

THERMOSTAT THERMOSTAT