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THREE-WIRE
BLK
BLK
WHT
WHT
GND
AUXILIARY
115-V
J-BOX
FIELD-SUPPLIED
DISCONNECT
ELECTRIC
DISCONNECT
SWITCH
Do not connect aluminum wire between disconnect switch
and furnace. Use only copper wire.
Use a separate, fused branch electrical circuit containing a properly
sized fuse or circuit breaker for this furnace. See Table 3 for wire
size and fuse specifications. A disconnecting means must be
located within sight from and readily accessible to furnace.
NOTE: Proper polarity must be maintained for 115-v wiring. If
polarity is incorrect, control center fault code indicator light will
flash rapidly and furnace will NOT operate.
The cabinet MUST have an uninterrupted or unbroken ground
according to NEC ANSI/NFPA 70-1996 and Canadian Elec-
trical 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. 25.)
NOTE 2
W
C
FIVE
WIRE
HEATING-
ONLY
W
R
GND
G
C
NOTE 1
CONTROL
Y
BOX
24-V
TERMINAL
BLOCK
NOTES:
FURNACE
→ Fig. 24—Heating and Cooling Application Wiring Diagram
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
THERMOSTAT
R
G
Y
TERMINALS
CONDENSING
UNIT
TWO
WIRE
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
Fig. 25—Relocating J-Box
2. Rotate J-box 180° and attach box to right side, using holes
provided.
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.
Step 2—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. 24. The 24-v terminal board is marked for easy connection
of field wiring. (See Fig. 26.) The 24-v circuit contains a 3-amp,
automotive-type fuse located on control center. (See Fig. 27.) Any
electrical shorts of 24-v wiring during installation, service, or
19
FIELD-SUPPLIED
DISCONNECT
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
GND
ALTERNATE
FIELD
LOCATION
A98209
A93051
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