INSTALLATION INSTRUCTIONS
Gas Furnace: (F/G)9MAE
440 01 4300 02
29
Specifications subject to change without notice.
!
CAUTION
FURNACE MAY NOT OPERATE HAZARD
Failure to follow this caution may result in intermittent furnace
operation.
Furnace control must be grounded for proper operation or else control
will lock out. Control must remain grounded through green/yellow wire
routed to gas valve and manifold bracket screw.
115
−
V Wiring
Furnace must have a 115-v power supply properly connected
and grounded.
NOTE
: Proper polarity must be maintained for 115-v wiring.
Control status indicator light flashes code 10 and furnace does
not operate if polarity is incorrect or if the furnace is not
grounded.
Verify that the voltage, frequency, and phase correspond to that
specified on unit rating plate. Also, check to be sure that
service provided by utility is sufficient to handle load imposed
by this equipment. Refer to rating plate or
Table 11
for
equipment electrical specifications.
U.S.A. Installations:
Make all electrical connections in
accordance with 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
Table 11
for
wire size and fuse specifications. A readily accessible means of
electrical disconnect must be located within sight of the
furnace.
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 35
)
Figure 34
Heating and Cooling Application Wiring Diagram with Single
−
Stage Thermostat
A11401
115-VOLT FIELD-
SUPPLIED
FUSED
DISCONNECT
JUNCTION
BOX
24-VOLT
TERMINAL
BLOCK
THREE-WIRE
HEATING-
ONLY
FIVE
WIRE
NOTE 2
NOTE 1
1-STAGE
THERMOSTAT
TERMINALS
FIELD-SUPPLIED
FUSED DISCONNECT
CONDENSING
UNIT
FURNACE
COM
R
W
C
Y
R
G
GND
GND
FIELD 24-VOLT WIRING
FIELD 115-, 208/230-, 460-VOLT WIRING
FACTORY 24-VOLT WIRING
FACTORY 115-VOLT WIRING
Connect Y/Y2-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- OR
460-VOLT
THREE
PHASE
208/230-
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