Carrier F96CTN Installation, Start-Up, Operating, Service And Maintenance Instructions page 24

F96CTN and G96CTN (Series A): Installation, Start-up, Operating, Service and Maintenance Instructions
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
Do not connect aluminum wire between disconnect switch and furnace.
Use only copper wire. See Fig.
Use a separate, fused branch electrical circuit with a properly sized fuse
or circuit breaker for this furnace. See
specifications. A readily accessible means of electrical disconnect must
be located within sight of the furnace.
ELECTRIC
DISCONNECT
SWITCH
Fig. 32 – Field-Supplied External Electrical Box on Furnace Casing
J-Box Installation
WARNING
!
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death, or
property damage.
High voltage field connections must be located in J-Box with furnace,
or in field supplied external disconnect mounted to furnace.
If field-supplied manual disconnect switch is to be mounted on furnace
casing side, select a location where a drill or fastener cannot damage
electrical or gas components.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
32.
Table 10 for wire size and fuse
COPPER
WIRE ONLY
ALUMINUM
WIRE
A190279
Fig. 33 – Installing J-Box (When Used)
The J-Box must be used when field line voltage electrical connections
are made to the furnace wiring harness inside the furnace casing. The
J-Box cover is not required if an external electrical box is attached to the
outside of the furnace casing. The field wiring and main wiring harness
are grounded with the furnace box is grounded to the green ground screw
of the J-Box bracket and the earth ground of the field electrical supply.
The field ground wire and furnace main ground wire are grounded when
the J-Box bracket is attached to the furnace and the field ground wire and
factory ground wire are secured to the bracket grounding screw. If the
J-Box cover is not used, the field and factory spliced connections must
be located inside the external electrical box. Do not leave splice
connections unprotected inside the furnace.
The J-Box cover, mounting bracket and screws are shipped in the loose
parts bag included with the furnace. See
locations.
The J-Box mounting bracket and green ground screw is used as a
grounding point for all line voltage wiring options. The J-Box cover may
be omitted when electrical connections are made inside an external
electrical box mounted external to the casing.
External Electrical Box on Furnace Casing
NOTE: Check to ensure that external electrical box does not interfere
with duct work, gas piping or the indoor coil drain. See
alternate electric entry through top panel.
24
A12226
Fig. 33 for J-Box mounting
Fig. 30 for