Bryant 340MAV instruction manual → ÐHeating and Cooling Application Wiring Diagram, II -V Wiring

FIELD 24-VOLT WIRING

FIELD 115-, 208/230-, 460-VOLT WIRING

FACTORY 24-VOLT WIRING

FACTORY 115-VOLT WIRING

			NOTE 2				THERMOSTAT
		FIVE	W	C R	G	Y		FIELD-SUPPLIED
							TERMINALS
		WIRE						FUSED DISCONNECT
		THREE-WIRE						208/230- OR
		HEATING-
		ONLY						460-VOLT
								THREE
BLK	BLK		W					PHASE
WHT	WHT		R
								208/230-
GND		GND						VOLT
115-VOLT FUSED		AUXILIARY	G					SINGLE
								PHASE
DISCONNECT		J-BOX	C	NOTE 1				GND
SWITCH		CONTROL	Y				CONDENSING
(WHEN		BOX					UNIT
REQUIRED)		24-VOLT					TWO
		TERMINAL					WIRE
			BLOCK	NOTES: 1.		Connect Y-terminal as shown for proper operation.
		FURNACE
					2.￿ Some thermostats require a "C" terminal connection as shown.

3.If any of the original wire, as supplied, must be replaced, use same type or equivalent wire.

A96415

→Fig. 22ÐHeating and Cooling Application Wiring Diagram

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

A93033

CAUTION: Do not connect aluminum wire between disconnect switch and furnace. Use only copper wire.

NOTE: Proper polarity must be maintained for 115-v wiring. If polarity is incorrect, control center LED status indicator light will flash rapidly and furnace will NOT operate.

FACTORY INSTALLED LOCATION

ALTERNATE

FIELD

LOCATION

A93051

Fig. 23ÐRelocating J-Box

WARNING: The cabinet MUST have an uninterrupted or unbroken ground according to NEC ANSI/NFPA 70-1996 and Canadian Electrical Code CSA C22.1 or local codes to minimize personal injury if an electrical fault should occur. This may consist of electrical wire or conduit approved for electrical ground when installed in accordance with existing electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in electrical shock, fire, or death.

J-BOX RELOCATION

1.Remove 2 screws holding auxiliary J-box. (See Fig. 23.)

2.Rotate J-box 180° and attach box to right side, using holes provided.

Ð18Ð

CAUTION: If manual disconnect switch is to be mounted on furnace, select a location where a drill or fastener will not contact electrical or gas components.

II.24-V WIRING

Make field 24-v thermostat connections at 24-v terminal block on control center. For proper cooling operation, Y wire from thermo- stat MUST be connected to Y terminal on control center, as shown in Fig. 22. The 24-v terminal board is marked for easy connection of field wiring. (See Fig. 24.) The 24-v circuit contains a 3-amp, automotive-type fuse located on control center. (See Fig. 25.) Any electrical shorts of 24-v wiring during installation, service, or maintenance may cause fuse to blow. If fuse replacement is required, use only a fuse of identical size (3 amp).

NOTE: Use AWG No. 18 color-coded copper thermostat wire for lengths up to 100 ft. For wire lengths over 100 ft, use AWG No. 16 wire.