Installation guide

INSTALLATION INSTRUCTIONS Gas Furnace: (F/G)9MXT, (F/G)9MXE
34 440 01 4005 05
Specifications subject to change without notice.
Figure 38 Heating and Cooling Application Single−Stage Wiring Diagram
A11387
115-V FIELD-
SUPPLIED
DISCONNECT
AUXILIARY
J-BOX
24-V
TERMINAL
BLOCK
THREE-WIRE
HEATING-ONLY
FIVE WIRE
NOTE 1
NOTE 2
FIELD-SUPPLIED
DISCONNECT
CONDENSING
UNIT
TWO
WIRE
FURNACE
C
O
N
T
R
O
L
R
G
COM
WCR GY
GND
GND
FIELD 24-V WIRING
FIELD 115-, 208/230-, 460-V WIRING
FACTORY 24-V WIRING
FACTORY 115-V WIRING
208/230- OR
460-V
THREE
PHASE
208/230-V
SINGLE
PHASE
BLOWER DOOR SWITCH
WHT
BLK
WHT
BLK
NOTES: Connect Y-terminal in furnace as shown for proper blower 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.
W
Y
GND
THERMOSTAT
TERMINALS
1.
2.
3.
Heating and Cooling Application Two−Stage Wiring Diagram with Single−Stage Thermostat
A11401
115ïVOLT FIELDï
SUPPLIED
FUSED
DISCONNECT
JUNCTION
BOX
24ïVOLT
TERMINAL
BLOCK
THREEïWIRE
HEATINGï
ONLY
FIVE
WIRE
NOTE 2
NOTE 1
1ïSTAGE
THERMOSTAT
TERMINALS
FIELDïSUPPLIED
FUSED DISCONNECT
CONDENSING
UNIT
FURNACE
COM
R
W
GND
GND
FIELD 24ïVOLT WIRING
FIELD 115ï, 208/230ï, 460ïVOLT WIRING
FACTORY 24ïVOLT WIRING
FACTORY 115ïVOLT WIRING
Connect Y/Y2ïterminal 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.
208/230ï OR
460ïVOLT
THREE
PHASE
208/230ï
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
YR
G
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.