3-44
8050502G
R e f e r t o " P R I N C I P A L W I R I N G
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
BLOWE
R
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
2
1
C
5
14C
BLK
WH
IT
E
TO
J3
P
IN1
2
T2
T1
TO
C2
P
IN1
TO
C2
P
IN3
TO
C2
P
IN1
2
13C
18C
BLK
NO
NC
BLK
BLK
O
IL RE
T
U
RN HE
A
T
E
R
F
R
O
N
T
MV
MV
GAS
VALVE
DRAIN
SAFETY
SWITCH
HI-LIMIT
COM
FOR UNITS WITH NO
ADD IN-LINE SPLICE
SAFETY DRAIN SWITCH
PROBE
TEMP
RE
D
WH
IT
E
BL
A
C
K
FULL
VAT
TO
J3
P
IN6
TO
J
3
P
IN2
TO
J3
P
IN9
COMPUTER GROUND (81C)
GND
VALV
E
VALV
E
ALAR
M
(BURNER
)
ORG
BLK
25V
25V
GND
BLUE
BLK
GRN
BLK
ORG
WHT
L
IN
E
VO
L
T
AG
E (
C
OM
)
LI
N
E
VO
LT
AG
E
(L
1)
DETAIL A-
A
A
A
DETAIL
BL
A
C
K
RE
D
TO
J
1
P
IN2
TO
J1
P
IN6
TO
J1
P
IN9
PW
R
G
V
A
L
24
V
K
2
For
D
RL
Y
4
3
5
A
L
12
V
D1
G
V
PW
R
K
1
RL
Y
D
1
2
6
AI
R
B/L
RL
Y
K
5
R
T
B/L
RL
Y
L
T
K
3
K
4
RL
Y
For
D
R
T
L
T
R
T
BLK
ORG
BLK
GND
ORG
V2
S
PWR
GN
D
A
S
A
D
GN
D
V2
D
SN
D
J
2
2
GN
D
1
3
SOUND
DEVICE
WH
T
BLU
E
GR
N
J
1
J
3
GND
25
V
25
V
GREEN
BLUE
ALAR
M
VALV
E
VALV
E
(BURNER
)
PROBE
TEMP
DUAL
VAT
COMPUTER OR
CONTROLLER
TO J2
D9
V1
S
AL
R
PWR
V1
D
GN
D
GN
D
GN
D
WHITE
WHITE
GAS
VALV
E
WH
IT
E
Old Single-Spark Ignition Module
