25
703889B
Figure 42. Gas Atmospheric Furnace, A/C Ready, M1G (B, C, D) 056, 070 Models
703890A
Figure 43. Standing Pilot with Induced Draft Furnace, A/C Ready M1G (B, C, D) 077, 090 Models
RED (LOW)
BLACK (HIGH)
BLUE (MED. HI)
ORANGE (MED. LO)
1
5
2
A/C
BLOWER
RELAY
3
6
4
ON/OFF
SWITCH
GAS VALVE
FAN
SWITCH
HI-LIMIT
AUX. LIMIT
TRANSFORMER
L1
N
C
R
24 V
115 V
BLACK
ORANGE
BLUE
ORANGE
GREEN
WHITE
WHITE
WHITE
BLACK
GRAY
BLUE
BLUE
BLACK
VENT SWITCH
BLUE
FURNACE ELECTRICAL BOX
L1
NEUTRAL
GROUND SCREW
HEATING/
COOLING
C
R
G
W
HEATING/COOLING
RED
RED
(SEE NOTE)
TIE WIRE
CONNECTOR
HOUSING CAP
BLUE
GRAY
3A FUSE
GRAY
RED
6
5
4
3
2
1
WHITE
6
5
4
3
2
1
RED (LO)
BLACK
(HIGH)
WHITE
SUPPLIED
BY INSTALLER
LEGENDS
115V:
FIELD 115V:
24V:
FIELD 24V:
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.
BLOWER
MOTOR
2 SPEED
BLOWER
MOTOR
4 SPEED
BLACK
BLACK
GRAY
GREEN
WHITE
MANUAL RESET
*
*M1G(C,D) Heating - replace orange wire with
red wire (low speed)
NOTE: To run at same speed in both heating and cooling mode,
remove wire from either terminal 4 or 6 on the relay, then attach
jumper to terminals 4 and 6.
6
5
4
3
2
1
1
5
2
A/C
BLOWER
RELAY
3
6
4
1
5
2
COMBUSTION
BLOWER
RELAY
3
6
4
ON/OFF
SWITCH
GAS
VALVE
HI-LIMIT
AUX. LIMIT
TRANSFORMER
PRESSURE
SWITCH
COMBUSTION FAN
L1
N
C
R
24 V
115 V
BLACK
BLACK
BLACK
BLACK
BLACK
ORANGE
ORANGE
GREEN
WHITE
WHITE
WHITE
WHITE
GRAY
GRAY
BLUE
BLUE
2
1
GRAY
L1
NEUTRAL
GROUND
SCREW
FURNACE ELECTRICAL BOX
RED
BLACK
BLUE
TIE WIRE
HEATING/
COOLING
BLUE
C
R
G
W
FAN
SWITCH
BLUE
RED*
CONNECTOR
HOUSING
GRAY
3A FUSE
GREEN
LEGENDS
115V:
FIELD 115V:
24V:
FIELD 24V:
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.
BLOWER
MOTOR
SINGLE
SPEED
HEATING/COOLING
6
5
4
3
2
1
RED (LOW)
BLACK (HIGH)
BLUE (MED. HI)
ORANGE
(MED. LO)
WHITE
BLOWER
MOTOR
4 SPEED
6
5
4
3
2
1
RED (LOW)
BLACK (HIGH)
WHITE
CONNECTOR
HOUSING CAP
SUPPLIED
BY INSTALLER
* Jumper Wire - M1GB Units Only
Otherwise Hi-Speed Connected
to Blower Relay
GRAY
RED
GREEN
WHITE
BLACK
BLACK
RED
BLOWER
MOTOR
2 SPEED
