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20. WIRING DIAGRAMS
703887B
Figure 40. Gas Atmospheric Furnace, M1GH 056, 070 Models
Gas Atmospheric Furnaces, M1GH 056, 070
ON/OFF
SWITCH
GAS VALVE
FAN SWITCH
HI-LIMIT
AUX. LIMIT
TRANSFORMER
L1 N
CR
24 V
115 V
WHITE
WHITE
WHITE
GRAY
BLUE
BLACK
GRAY
FAN ON/AUTO SWITCH
ORANGE
ORANGE
BLACK
L1
NEUTRAL
GROUND
SCREW
FURNACE ELECTRICAL BOX
BLACK
3A FUSE
BLOWER
MOTOR
HEATING
ONLY
654321
C
R
W
GRAY
RED
BLUE
CONNECTOR
HOUSING CAP
COMMON
FOR OPTIONAL
ACCESSORY KITS
BLACK
BLACK
LEGENDS
115V: FIELD 115V:
24V: FIELD 24V:
RED
NOTES
1. Incoming power must be polarized. Observe
color coding. (See furnace data label for
electrical information.)
2. If any of the original wires (as supplied with
the appliance) must be replaced, use 105˚C
Thermoplastic type wire or its equivalent.
BLACK
BLACK
SUPPLIED
BY INSTALLER
BLUE
WHITE
MANUAL RESET
VENT SWITCH