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Electrical Connection
and Ladder Diagram
August 1999
Used oon:
Model
Design Sequence
AW325
B
7.1-7
7
WARNING: THIS HEATER MAY START AT ANY TIME
ELECTRICAL CONNECTION DIAGRAM
ELECTRICAL LADDER DIAGRAM
GROUND
TRANSFORMER
L.E.D. INDICATOR
FAN
MOTOR
HSI CONTROL
HIGH LIMIT
SWITCH
AIR PROVING
SWITCH
FLAME
SENSOR
HEAT CHAMBER
OR
BURNER GROUND
IGNITER
TERMINAL
STRIP
NOTE: REMOVE JUMPER TO
ADD THERMOSTAT
*THERMOSTAT
GAS CONTROL VALVE
GREEN
BLACK
YELLOW
WHITE
BLACK
MOTOR
S
W
I
T
C
H
ON
OFF
GREEN
YELLOW
FAN
MOTOR
RELAY
WHITE
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
BLACK
RED
RED
RED
RED
RED
RED
WHITE
WHITE
WHITE
RED
YELLOW
YELLOW
YELLOW
IND
L1
HSI
HSIG
L2
W
PSI
FSI
GV
PSO
FSG
C
BLA
CK
BLA
CK
RED
RED
WHITE
YELLO
W
YELLO
W
WHITE
BR
O
W
N
YELLO
W
GREEN
GREEN
YELLOW
RED
BLA
C
K
BROWN
BROWN
BLA
C
K
WHITE
BR
O
W
N
GREEN
GREEN
GREEN
RED
RED
WHITE
YELLO
W
WHITE
BLACK
WIRING SUPPLIED WITH
OPTIONAL THERMOSTAT
WHITE
BLACK
BLA
C
K
RED
WHITE
GREEN
GR
OUND
L2 NEUTRAL
L1 HO
T
L2 HO
T
WIRING NOT
SUPPLIED WITH UNIT
2 4 6 8
0 1
L1
L2
ON-OFF
SWITCH
RELAY
*THERMOSTAT
NEUTRAL
220V
24V
TRANSR
OMER
SOLENOIDS
HIGH LIMIT
SWITCH
GROUND
AIR PROVING
SWITCH
BURNER
GROUND
FLAME
SENSOR
HOT
SURFACE
IGNITER
HSI CONTROL
L.E.D. INDICATOR
IND
L1
HSI
HSIG
L2
W
PSI
FSI
GV
PSO
FSG
C
* REMOTE MOUNT ONLY, OPTIONAL ACCESSORY
2 4 6 8
0 1
Wiring Diagrams