INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MVE
440 01 4400 03
31
Specifications subject to change without notice.
by this equipment. Refer to rating plate or
for
equipment electrical specifications.
U.S.A. Installations:
Make all electrical connections in
accordance with the current edition of the National Electrical
Code (NEC) ANSI/NFPA 70 and any local codes or ordinances
that might apply.
Canadian Installations:
Make all electrical connections in
accordance with the current edition of the Canadian Electrical
Code CSA C22.1 and any local codes or ordinances that might
apply.
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.
COPPER
WIRE ONLY
SWITCH
ALUMINUM
WIRE
A11146
Use a separate, fused branch electrical circuit with a properly
sized fuse or circuit breaker for this furnace. See
for
wire size and fuse specifications. A readily accessible means of
electrical disconnect must be located within sight of the
furnace.
Figure 35
Heating and Cooling Application Two
−
Stage Wiring Diagram with Single
−
Stage
Thermostat
A11401
115
ï
VOLT FIELD
ï
SUPPLIED
FUSED
DISCONNECT
JUNCTION
BOX
24
ï
VOLT
TERMINAL
BLOCK
THREE
ï
WIRE
HEATING
ï
ONLY
FIVE
WIRE
NOTE 2
NOTE 1
1
ï
STAGE
THERMOSTAT
TERMINALS
FIELD
ï
SUPPLIED
FUSED DISCONNECT
CONDENSING
UNIT
FURNACE
COM
R
W
GND
GND
FIELD 24
ï
VOLT WIRING
FIELD 115
ï
, 208/230
ï
, 460
ï
VOLT WIRING
FACTORY 24
ï
VOLT WIRING
FACTORY 115
ï
VOLT WIRING
Connect Y/Y2
ï
terminal as shown for proper operation.
Some thermostats require a ”C” terminal connection as shown.
If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.
208/230
ï
OR
460
ï
VOLT
THREE
PHASE
208/230
ï
VOLT
SINGLE
PHASE
WHT
BLK
WHT
BLK
W/W1
W2
Y/Y2
G
NOTES: 1.
2.
3.
BLOWER
DOOR
SWITCH
C
O
N
T
R
O
L
C
Y
R
G
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
)
