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8050526D
OIL
RETURN
HEATER FRONT
WHITE
GREEN
WHITE
ORANGE
BLACK
ALARM
VALVE
VALVE
GROUND
(BURNER)
GROUND
25V
25V
TO J1 PIN9
TO J1 PIN6
TO J1 PIN2
DUAL VAT ONLY
TEMP PROBE
RED
WHITE
HI-LIMIT
BLACK
COM
N
C
N
O
SAFETY DRAIN SWITCH
BLACK
GAS VALVE
1
4
C
B
L
A
C
K
13C 18C
FOR UNITS WITH NO
SAFETY DRAIN SWITCH
ADD IN-LINE SPLICE
BLACK
BLACK BLACK
BLACK
ADD IN-LINE SPLICE
SAFETY DRAIN SWITCH
FOR UNITS WITH NO
11C12C
B
L
A
C
K
1
4
C
GAS VALVE
BLACK
SAFETY DRAIN SWITCH
N
O
N
C
COM
BLACK
TO J3 PIN9
HI-LIMIT
TO J3 PIN2
TO J3 PIN6
WHITE
RED
TEMP PROBE
A
RELAY
LEFT
DUAL
DUAL
OR
FULL
RIGHT
RELAY
J2
GND
V1S
ALARM
POWER
V1D
GND
BLUE
GREEN
25V
25V
GROUND
ORANGE
(BURNER)
GROUND
VALVE
VALVE
ALARM
SOUND DEVICE
TO J2
COMPUTER OR CONTROLLER
J3 OPPOSITE
SIDE
J1 OPPOSITE
SIDE
DETAI
L
A
COMPUTER GND (81C)
BLACK
WHITE
GREEN
BLUE
GND
GND
GND
GND
V2D
PWR
A D
V2S
A S
TO J3
PIN12
DETAIL A-A
LINE VOLTAGE
LINE VOLTAGETO C2 PIN1
TO C2 PIN3
TO C2 PIN12
12
C5
BLOWER
WHITE
GREEN
WHITE
T
1
T
2
T
1
T
2
(L1)
(COM)
BIH52/MH52 Main Wiring Diagram (CE)
Refer to "PRINCIPAL WIRING
CONNECTIONS" on Page 3-42 for
detail of conncection points J1, J2,
J3, C2, C3, and C5.
Old Single-Spark Ignition Module