WIRING DIAGRAM
A wiring diagram is located on the inside front panel of the appliance.
Electrical Rating: 120 VAC, 60 Hz.
Note: If any of the original wiring supplied with this appliance must be replaced, it must be replaced with
appliance wiring material (180c) or its equivalent. Wires are available through the manufacturer.
BK: BLACK
P: PURPLE
W: WHITE
Number display button
B u r n i n g l am p
7 S e g
D i p s w i t c h
( A d j u s t a b le )
M A X b u t to n
M I N b u t to n
I n c r e a s e b u t to n
D e c r e a s e b u t to n
E r r o r
c a l l b u t to n
Mixing
thermistor
Inlet
thermistor
Output
thermistor
SV2
SV1
SV3
MV
O.H.C.F
H i -
l i mi t
LB:LIGHT BLUE
BL: BLUE
R: RED
Water
Control
B R
valve
B K
W
G
Y
R
LE D
D i p s w it c h
( u n t o u ch a b l e )
B K
B K
B K
O
G
R
L B
B L
W
G
B K
B L
B L
B L
B L
G F I
B L
B R
B L
B R
G: GREEN
Y: YELLOW
GY:GRAY
W
BL
R
B K
W
G
Y
O
R
WR
R
Y
G
O
B K
W
Pump
B K
W
Ground
Fuse
Trans-
box
former
B R
B R
- 39 -
O: ORANGE
BR:BROWN
Propor-
tional
Valve
Flow
B K
B K
W
W
Sensor
R
R
R
B K
B K
B L
W
W
G Y
G Y
P
Remote
W
controller
BK
port
Air-fuel
ratio rod
Ground
Flame rod
W
Elect rod
O
F M
Y
B L
R
I G
P
P
P
P
B K
B K
B K
W
BK
W
G
1
B L
2
Master
O
3
O
P
4
Heater
Heater
Heater
Heater
Thermostat
AC120V
Ground