J−Box Installation - International comfort products B Series Installation Instructions Manual

INSTALLATION 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.
Figure 35 Heating and Cooling Application Single Stage Wiring Diagram
FIVE WIRE
THREE-WIRE
HEATING-ONLY
BLOWER DOOR SWITCH
BLK BLK
WHT WHT
GND
AUXILIARY
115-V FIELD-
J-BOX
SUPPLIED
DISCONNECT
J−Box Installation
WARNING
!
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury, death, or property damage.
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.
The J-Box is used when field line voltage electrical connections
are made to the furnace wiring harness inside the furnace
casing. The J-Box is not required if a field-supplied electrical
box is attached to the outside of the furnace casing and the box
is grounded to the green ground wire of the main wiring
harness and the earth ground of the field electrical supply.
The J−Box cover, mounting bracket and screws are shipped in
the loose parts bag included with the furnace. The J−Box can
be mounted on the left or right side of the casing, as viewed
from the upflow position. (See Figure 36)
440 01 4102 01
NOTE 2
W C R
W
C
R
O
N
T
GND
R
G
O
L COM
NOTE 1
Y
24-V
TERMINAL
BLOCK
NOTES:
FURNACE
Specifications subject to change without notice.
SWITCH
Use a separate, fused branch electrical circuit with a properly
sized fuse or circuit breaker for this furnace. See Table 11 for
wire size and fuse specifications. A readily accessible means of
electrical disconnect must be located within sight of the
furnace.
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
THERMOSTAT
G Y
TERMINALS
CONDENSING
UNIT
TWO
WIRE
1. Connect Y-terminal in furnace as shown for proper blower 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.
Figure 36 Optional J−Box Locations
Representative drawing only, some models may vary in appearance.
Gas Furnace: N9MSB
COPPER
WIRE ONLY
ALUMINUM
WIRE
FIELD-SUPPLIED
DISCONNECT
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
GND
A11146
A11387
OPTIONAL
J−BOX
LOCATIONS
L12F024
31