24-V Wiring - Carrier 58MVP080 Installation, Start-Up, And Operating Instructions Manual

115-V
SINGLE
PHASE
115-V
FIELD-SUPPLIED
DISCONNECT
SWITCH
ELECTRIC
DISCONNECT
SWITCH
Do not connect aluminum wire between disconnect switch
and furnace. Use only copper wire.
The cabinet MUST have an uninterrupted or unbroken ground
according to NEC ANSI/NFPA 70-1999 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 electric 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 5
FIVE
WIRE
THREE-WIRE
HEATING
ONLY
W/W1
NOTE
W2
R
G
AUXILIARY
J-BOX
C
Y/Y2
24-V
FURNACE TERMINAL
CONTROL BLOCK
CENTER
Fig. 22—Heating and Cooling Application Wiring Diagram
COPPER
WIRE ONLY
ALUMINUM
WIRE
A93033
THERMOSTAT
W C R G Y
TERMINALS
3
NOTE 1
CONDENSING
TWO WIRE
NOTES:
1. Connect Y or Y/Y2 terminal as shown for proper cooling operation.
2. Proper polarity must be maintained for 115-v wiring.
3. Use W2 with 2-stage thermostat when zoning.
4. If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
5. Some thermostats require a "C" terminal connection as shown.
ALTERNATE
FIELD
LOCATION
Fig. 23—Relocating J-Box
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. Y wire from thermostat MUST be connected to Y
terminal on control center, as shown in Fig. 22, for proper cooling
operation. 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).
19
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-, 208/230-, 460-V WIRING
FIELD-SUPPLIED
DISCONNECT
THREE PHASE
GND
GND
208/230-V
GND
GND
UNIT
208/230- OR
460-V
SINGLE
PHASE
A98325
FACTORY
INSTALLED
LOCATION
A00212