Carrier P, 52C manual Component Legend

52C,P

SERIES

TYPICAL THERMOSTAT INTERFACE

T’STAT OUTPUT:	RC CONTROLER OUTPUT:	UNIT OPERATION:
‘G’ — 24 VAC	‘FR’ — LINE VAC	FAN
‘G’ — 0 VAC	‘FR’ — 0 VAC
‘Y’ — 24 VAC	‘HR1 & HR2’ — LINE VAC	HEATING
‘O’ — 0 VAC	‘RVR’ — LINE VAC
‘W’ — 24 VAC	‘HR1 & HR2’ — LINE VAC	HEATING
‘Y’ — 24 VAC	‘CR’ — LINE VAC	COOLING
‘O’ — 24 VAC	‘RVR’ — 0 VAC
‘R’ — 24 VAC	‘R’ — 24 VAC OUTPUT	POWER TO WALL
‘C’ — COMMON	‘C’ — COMMON	THERMOSTAT

1.If ‘W’ is ON, then ‘FR’ is forced ON (regardless of ‘G’) & ‘CR’ is forced OFF.

2.If ‘Y’ is ON, then ‘FR’ is forced ON (regardless of ‘G’).

3.If IFT (indoor coil) is < 35° F, then ‘CR’ is forced OFF until IFT is > 39° F.

			COMPONENT LEGEND
		Component Connection (Marked)		HTR	—	Heater
				IFT	—	Indoor Frost Thermostat
		Component Connection (Unmarked)		NEC	—	National Electrical Code
				OFT	—	Outdoor Frost Thermostat
		Terminal Board Connection		OL	—	Overload
				PCBD	—	Printed Circuit Board
		Field Splice		HR1	—	Heater Relay
		Field Control Wiring		HR2	—	Heater Relay
				CR	—	Compressor Relay
		Accessory or Optional Wiring		FR	—	Fan Relay
				RVR	—	Reversing Valve Relay
		To Indicate Common Potential Only		PLS	—	Primary Limit Switch
				RVS	—	Reversing Valve Solenoid
		Not To Represent Wire
				SLS	—	Secondary Limit Switch
CAP	—	Capacitor		SSS	—	Speed Selector Switch
COMP	—	Compressor		ST	—	Start Thermistor
FM	—	Fan Motor		TRANS	—	Transformer

NOTES:

1.Recommended for use on grounded power supply only.

2.Compressor and fan motor thermally protected.

3.Use copper conductors only.

4.All wiring must conform with NEC and local codes.

5.Dashed lines indicate components when used.

6.Field control wire suitable for NEC class 2 control circuit, at 24 volts.

7.OFT determines whether to bring on compressor heat or electric heat.

FIGURE 69 — 52CQ AND 52 PQ — TYPICAL WIRING SCHEMATIC FOR

WALL THERMOSTAT HEAT PUMP UNITS

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