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