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Wiring Diagrams
Electrical Connection
and Ladder Diagram
Used oon:
Model
Design Sequence
284
A
285
A
7.1-2
2
August 1999
GAS CONTROL VALVE
THERMOSTAT
FAN MOTOR
IGNITER
GROUND
HSI
CONTROL
MV
MV
TR
TH
FP
GND
L1
IGN
RED
RED
YELLOW
BLACK
WHITE
GREEN
BLACK
BLACK
YELLO
W
YELLOW
WHITE
BLACK
24 VAC
TRANS
120 VAC
BLACK
BLACK
WHITE
BLA
C
K
BLA
C
K
BLA
CK
WHITE
WHITE
BLACK
POWER CORD
120 VAC
TERMINAL
BOX
24 VAC
TERMINAL
BOX
GROUND
GREEN
BLACK
BLA
C
K
AIR PROVING
SWITCH
HIGH LIMIT
SWITCH
BLACK
BLACK
THERMOSTAT
L1
GREEN
MOTOR
HIGH LIMIT
SWITCH
TRANSFORMER
120V
24V
NEUTRAL
HOT
SURFACE
IGNITER
HSI
CONTROL
AIR PROVING
SWITCH
SOLENOID(S)
FLAME
SENSOR
MV
MV
TR
TH
FP
GRD
L1
IGN
ELECTRICAL LADDER DIAGRAM
ELECTRICAL CONNECTION DIAGRAM
WARNING: THIS HEATER MAY START AT ANY TIME