3-44

8050502G
Refer to "PRINCIPAL WIRING
CONNECTIONS" on Page 3-42 for
detail of connection points J1, J2,
J3, C2, C3, and C5.
BIH52/MH52 Main Wiring Diagram (U.S. and Non-CE Export)
MV
14C
BLK
BLOWER
SAFETY
DRAIN
SWITCH
12C
BLK
NO
NC
BLK COM
FOR UNITS WITH NO
SAFETY DRAIN SWITCH
ADD IN-LINE SPLICE
HI-LIMIT
11C
BLK
MV
21
C5
14C
BLK
WHITE
TO J3 PIN12
T2T1
TO C2 PIN1
TO C2 PIN3
TO C2 PIN12
13C
18C
BLK
NO
NC
BLK
BLK
OIL RETURN HEATER FRONT
MV
MV
GAS
VALVE
DRAIN
SAFETY
SWITCH
HI-LIMIT
COM
FOR UNITS WITH NO
ADD IN-LINE SPLICE
SAFETY DRAIN SWITCH
PROBE
TEMP
RED
WHITE
BLACK
FULLVAT
TO J3 PIN6
TO J3 PIN2
TO J3 PIN9
COMPUTER GROUND (81C)
GNDVALVEVALVEALARM(BURNER)
ORG
BLK
25V25VGND
BLUE
BLK
GRN
BLK
ORG
WHT
LINE VOLTAGE (COM)
LINE VOLTAGE (L1)
DETAIL A-A
A
A
DETAIL
BLACK
RED
TO J1 PIN2
TO J1 PIN6
TO J1 PIN9
PW
RG
V
A
L
24
V
K
2
For
D
RL
Y
435
A
L12
V
D1G
VPW
R
K
1
RL
Y
D
12 6
AI
R
B/L
RL
Y
K
5
R
T
B/L
RL
Y
L
T
K
3K4
RL
Y
For
D
R
T
L
TR
T
BLK
ORG
BLK
GND ORG V2
S
PWR
GN
D
A
S
A
D
GN
DV2
D
SN
D
J22GND13SOUNDDEVICEWHTBLUEGRNJ1J3GND25V25V
GREEN
BLUE
ALARM
VALV
E
VALV
E
(BURNER)
PROBE
TEMP
DUALVATCOMPUTER ORCONTROLLERTO J2
D9
V1
S
ALRPWRV1
D
GN
D
GN
D
GN
D
WHITE WHITE
GAS
VALV
E
WHITE

Old Single-Spark Ignition Module