Carrier 592-085 warranty WIRING DIAGRAMS 52P AND 52C cont

WIRING DIAGRAMS (52P AND 52C) (cont)

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 < 20° F, then ‘CR’ is forced OFF until IFT is > 50° F.

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

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 N.E.C. and local codes.

5.Dashed lines indicate compo- nents when used.

6.Field control wire suitable for N.E.C. class 2 control circuit, at 24 volts.

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

52PQ and 52CQ — Typical Wiring Schematic for Wall Thermostat Control Heat Pump Units

46