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L1 HOT
INTERLOCK
SWITCH
ROLLOUT
SWITCH
(IF USED)
AUX
LIMIT
WARNING-
ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY
OR DEATH.UNIT MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
NOTE-
IF ANY WIRE IN THIS APPLIANCE IS REPLACED,IT
MUST BE REPLACED WITH WIRE OF LIKE SIZE,
RATING, INSULATION THICKNESS, AND TERMINATION
507335-03
120V
24V
FLAME
SENSOR
ROLLOUT
SWITCH
PRESSURE
SWITCH
PRESSURE
(LOW)
SWITCH
(HIGH)
LIMIT
AUX LIMIT
(IF USED)
WIRING SCHEMATIC
Figure 45. Wiring Schematic
120/1/60
IGN
IND HIGH
IND LOW
HUM
EAC
CIRCULATION
BLOWER
MOT
TRANSFORMER
FP
TR
TH
MVL
HLO
MVH
IGNITION
HPS
CONTROL
LPS
HLI
W1 W2
C
R G
Y
W1 W2 Y R G
THERMOSTAT
2011
C
Issue 2302
HOT SURFACE
IGNITER
INDUCED DRAFT
BLOWER
MOT
HUMIDIFIER
AIR CLEANER
1ST STAGE
2ND STAGE
GAS VALVE
MOT
CONDENSER
LINE VOLTAGE FIELD INSTALLED
LINE VOLTAGE - FACTORY
CLASS II VOLTAGE FIELD WIRING
LOW VOLTAGE - FACTORY
HEATING UNITS-GAS
GAS FIRED TWO STAGE
FURNACE
Supersedes
NEUTRAL
Litho U.S.A.
Page 39 of 39
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