Bryant 549B, 542J Legend And Notes For Typical Wiring Schematic, TYPICAL WIRING SCHEMATIC cont

TYPICAL WIRING SCHEMATIC (cont)

542J150,180

LEGEND AND NOTES FOR TYPICAL WIRING SCHEMATIC

AHA	—	Adjustable Heat Anticipator	L	—	Light
BKR W/AT —		Breaks with Amp Turns	LOR	—	Lock Out Relay
C	—	Contactor, Compressor	LPS	—	Low-Pressure Switch
CAP	—	Capacitor	LS	—	Limit Switch
CB	—	Circuit Breaker	OAT	—	Outdoor-Air Thermostat
CC	—	Cooling Compensator	OFC	—	Outdoor-Fan Contactor
CH	—	Crankcase Heater	OFM	—	Outdoor Fan Motor
CLO	—	Compressor Lockout	OP	—	Overcurrent Protector
COMP	—	Compressor Motor	PL	—	Plug Assembly
CT	—	Current Transformer	QT	—	Quadruple Terminal
CTD	—	Compressor Time Delay	RVR	—	Reversing Valve Relay
DAT	—	Discharge Air Thermistor	RVS	—	Reversing Valve Solenoid
DB	—	Defrost Board	TB	—	Terminal Block
DFT	—	Defrost Thermostat	TC	—	Thermostat Cooling
DM	—	Damper Motor	TH	—	Thermostat Heating
DR	—	Defrost Relay	TRAN — Transformer
DU	— Dummy Terminal				Terminal (Marked)
EC	— Enthalpy Control
EQUIP	— Equipment				Terminal (Unmarked)
FL	— Fuse Link				Terminal Block
FPT	— Freeze Protection Thermostat
GND	— Ground				Splice
HC	— Heater Contactor				Factory Wiring
HPS	— High-Pressure Switch
HR	— Heat Relay				Field Wiring
HTR	— Heater				Option/Accessory Wiring
IFC	— Indoor-Fan Contactor
IFCB	— Indoor-Fan Circuit Breaker				To Indicate Common Potential Only:
IFM	— Indoor Fan Motor				Not To Represent Wiring
IP	— Internal Protector

NOTES:

1.Compressor and/or fan motor(s) thermally protected. Three-phase motors are protected against primary single phasing conditions.

2.If any of the original wire furnished must be replaced, it must be replaced with type 90° C wire or its equivalent.

3.CB1,2 must trip amps are equal to or less than 156% FLA, IFCB 140%.

4.The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices. Before replacing CLO, check these devices.

5.Jumpers are omitted when unit is equipped with economizer.

6.Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a single-pole, double-throw contact. An underlined number signifies a normally-closed contact. Plain (no line) number signifies a normally-open contact.

7.Remove jumper between terminals RC and RH.

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