Carrier 50HCQA Field Connections, Outdoor Air Temperature OAT Sensor, EconoMi$ert2

Outdoor Air Temperature (OAT) Sensor —

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$ert2 —

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

Outdoor air management functions can be enhanced with field-installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors) Space CO2 sensor

Outdoor air CO2 sensor

Refer to Table 3 for accessory part numbers.

Field Connections

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. 30). 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).

Connect T-55:See Fig. 31 for typical T-55 internal connections. Connect the T-55 SEN terminals to TB1 terminals 1 and 3 (see Fig. 32).

TB1PL

SEN 1 J6-7

SEN 3 J6-6

C08212

Fig. 32 - PremierLink T-55 Sensor

Connect T-56:See Fig. 33 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. 34).

50HCQA

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

Table 4 provides a summary of field connections for units equipped with Space Sensor. Table 5 provides a summary of field connections for units equipped with Space Thermostat.

Space Temperature (SPT) Sensors —

Cool Warm

Fig. 33 - T-56 Internal Connections

C08202

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.

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

C08201

Fig. 31 - T-55 Space Temperature Sensor Wiring

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

Jumper

SET

SET 5 J6-5

C08213

Fig. 34 - PremierLink T-56 Sensor

Connect Thermostat —

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 TB1 as shown in Fig. 35.

If the 50HCQ 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.

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