24-V Wiring - Bryant 350MAV Installation, Start-Up, And Operating Instructions Manual

THREE-WIRE
BLK BLK
WHT WHT
GND
AUXILIARY
115-VOLT FUSED
J-BOX
DISCONNECT
SWITCH
(WHEN
REQUIRED)
ELECTRIC
DISCONNECT
SWITCH
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.
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.
NOTE 2
W C
FIVE
WIRE
HEATING-
ONLY
W
R
GND
G
C
CONTROL
Y
BOX
24-VOLT
TERMINAL
BLOCK
FURNACE
→ Fig. 22—Heating and Cooling Application Wiring Diagram
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-VOLT WIRING
THERMOSTAT
R G Y
TERMINALS
NOTE 1
CONDENSING
UNIT
TWO
WIRE
NOTES: 1. Connect Y-terminal as shown for proper operation.
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.
FACTORY
INSTALLED
LOCATION
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.
—18—
FIELD-SUPPLIED
FUSED DISCONNECT
208/230- OR
460-VOLT
THREE
PHASE
208/230-
VOLT
SINGLE
PHASE
GND
Fig. 23—Relocating J-Box
A96415
ALTERNATE
FIELD
LOCATION
A93051