Bryant 551A, 558F, 551B manual TYPICAL WIRING SCHEMATIC Sizes

TYPICAL WIRING SCHEMATIC (Sizes 155-300)

			LEGEND
AHA	— Adjustable Heat Anticipator	FSS	— Filter Status Switch	SW	—	Switch
AWG	— American Wire Gage	FU	— Fuse	TB	—	Terminal Block
BRK W/AT — Breaks with Amp Turns		GND	— Ground	TC	—	Thermostat Cooling
C	— Contactor, Compressor	HC	— Heater Contactor	TH	—	Thermostat Heating
CAP	— Capacitor	HPS	— High-Pressure Switch	TRAN —		Transformer
CB	— Circuit Breaker	HTR — Heater				Terminal (Marked)
CC	— Cooling Compensator	IFC	— Indoor-Fan Contactor
CH	— Crankcase Heater	IFCB — Indoor-Fan Circuit Breaker				Terminal (Unmarked)
CLO	— Compressor Lockout	IFM	— Indoor-Fan Motor
COMP	— Compressor Motor	IFR	— Indoor-Fan Relay			Terminal Block
CR	— Control Relay	L	— Light
CT	— Current Transformer	LOR — Lockout Relay				Splice
DAT	— Discharge Air Thermistor	LPS	— Low-Pressure Switch
DM	— Damper Motor	LS	— Limit Switch			Factory Wiring
DU	— Dummy Terminal	LSM	— Limit Switch (Manual Reset)			Field Wiring
EC	— Enthalpy Control	OAT	— Outdoor-Air Thermostat
EQUIP	— Equipment	OFC	— Outdoor-Fan Contactor			Option/Accessory Wiring
ER	— EconoMi$er Relay	OFM — Outdoor-Fan Motor				To indicate common potential
EPS	— Emergency Power Supply	OP	— Overcurrent Protection
						only; not to represent wiring.
	(9 volt)	PL	— Plug Assembly
FL	— Fuse Link	PRI	— Primary
FLA	— Full Load Amps	QT	— Quadruple Terminal
FPT	— Freeze Protection Thermostat	SAT	— Supply Air Thermostat

NOTES:

1.Compressor and/or fan motor(s) thermally protected; 3-phase motors 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.Jumpers are omitted when unit is equipped with EconoMi$er.

5.IFCB must trip amps is equal to or less than 140% FLA.

6.The CLO locks out the compressor to prevent short cycling on compressor over- load and safety devices. Before replacing CLO, check these devices.

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

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