Bryant 340MAV instruction manual Wiring, III Accessories

Field-supplied wiring shall conform with the limitations of 63°F (35°C) rise.

WARNING: Blower access panel door switch opens 115-v power to control center. No component operation can occur. Do not bypass or close switch with panel removed. Failure to follow this warning could result in personal injury or death.

→CAUTION: Furnace control must be grounded for

proper operation or control will lock out. Control is grounded through green/yellow wire routed to gas valve and burner box screw. Failure to follow this caution will result in intermittent unit operation.

I. 115-V WIRING

Before proceeding with electrical connections, make certain that voltage, frequency, and phase correspond to that specified on unit rating plate. Also, check to be sure that service provided by power supply is sufficient to handle load imposed by this equipment. Refer to rating plate or Table 4 for equipment electrical specifi- cations.

Make all electrical connections in accordance with National Electrical Code (NEC) ANSI/NFPA 70-2002 and any local codes or ordinances that might apply. For Canadian installations, all electrical connections must be made in accordance with Canadian Electrical Code CSA C22.1 or authorities having jurisdiction.

ALTERNATE
FIELD	FACTORY
LOCATION
	INSTALLED
	LOCATION

A00212

Fig. 29—Relocating J-Box

WARNING: The cabinet MUST have an uninterrupted or unbroken ground according to NEC ANSI/NFPA 70-2002 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.

Use a separate, fused branch electrical circuit containing a properly			J-BOX RELOCATION
sized fuse or circuit breaker for this furnace. See Table 4 for wire				1. Remove 2 screws holding auxiliary J-box. (See Fig. 29.)
size	and fuse specifications. A disconnecting means must be
				2. Rotate J-box 180° and attach box to right side, using holes
located within sight from and readily accessible to furnace.
					provided.
→
	CAUTION: Do not connect aluminum wire between	→
					CAUTION: If manual	disconnect switch is to be
	disconnect switch and furnace. Use only copper wire.
					mounted on furnace, select a location where a drill or
	(See Fig. 28.) Failure to follow this caution will result in
					fastener will not contact	electrical or gas components.
	intermittent unit operation or performance satisfaction.
					Failure to follow this caution will result in intermittent
					unit operation or performance satisfaction.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control center LED status indicator light will			II.	24-V WIRING
flash rapidly and furnace will NOT operate.
			Make field 24-v thermostat connections at 24-v terminal block on
			furnace control. For proper cooling operation, Y wire from
			thermostat MUST be connected to Y terminal on furnace control
			center, as shown in Fig. 27. The 24-v terminal block is marked for
			easy connection of field wiring. (See Fig. 30.) The 24-v circuit
			contains a 3-amp, automotive-type fuse located on furnace control.
			(See Fig. 31.) Any electrical shorts of 24-v wiring during instal-
			lation, service, or maintenance may cause fuse to blow. If fuse
			replacement is required, use only a fuse of identical size (3 amp)
			and type. The control will flash code 24 when fuse needs
			replacement.
	ELECTRIC		NOTE: Use AWG No. 18 color-coded copper thermostat wire for
	DISCONNECT		lengths up to 100 ft. For wire lengths over 100 ft, use AWG No.
	SWITCH
	COPPER		16 wire.
	WIRE ONLY		III.	ACCESSORIES
	ALUMINUM			1. Electronic Air Cleaner (EAC)
					Two quick-connect terminals marked EAC-1 and EAC-2
	WIRE
					are provided for EAC connection. (See Fig. 31.) These
	A00290				terminals are energized with 115v (1.0-amp maximum)
	Fig. 26—Bottom Filter Arrangement				during blower motor operation.
		—20—