115-V Wiring; Accessories - Bryant 340MAV Installation, Start-Up, And Operating Instructions Manual

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.
Use a separate, fused branch electrical circuit containing a properly
sized fuse or circuit breaker for this furnace. See Table 4 for wire
size and fuse specifications. A disconnecting means must be
located within sight from and readily accessible to furnace.
CAUTION: Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.
(See Fig. 28.) 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
flash rapidly and furnace will NOT operate.
ELECTRIC
DISCONNECT
SWITCH
Fig. 26—Bottom Filter Arrangement
COPPER
WIRE ONLY
ALUMINUM
WIRE
A00290
ALTERNATE
FIELD
LOCATION
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.
J-BOX RELOCATION
1. Remove 2 screws holding auxiliary J-box. (See Fig. 29.)
2. Rotate J-box 180° and attach box to right side, using holes
provided.
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.
Failure to follow this caution will result in intermittent
unit operation or performance satisfaction.
II. 24-V WIRING
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.
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.
III. ACCESSORIES
1. Electronic Air Cleaner (EAC)
Two quick-connect terminals marked EAC-1 and EAC-2
are provided for EAC connection. (See Fig. 31.) These
terminals are energized with 115v (1.0-amp maximum)
during blower motor operation.
—20—
FACTORY
INSTALLED
LOCATION
A00212