User manual

34
WIRING DIAGRAM
1
3
1
12
1
Bk
W
1
F
B
C
D
W
Y
Bk
R
4
1
R
Y
W
Bk
R
Br
B
R
Gy
Gy
5
1
P
B
Br
2
3
4
E
6
P
A
R
R
R
RR
A
1
B
3
P
P
C
2
C
1
B
22
C
33
B
1
Y
FM
W
Y
R
R
B
Br
Or
Y
Gy
B
4
W
W
E
2
F
6
IG
Gyy
TRANSFOMER
SURGE PROTECTOR
F
5
13
B
Br
FUSE
(3A)
Gr/Y
GND
F
4
Y
Y
Bk
W
Bk
Gr/Y
GND
ELECTRODE
SPARK
IGNITER
Bk
MAIN SOLENOID VALVE
SOLENOID VALVE 1
SOLENOID VALVE 2
SOLENOID VALVE 3
D
1
Bk
Bk
MODULATING VALVE
CURRENT ADJUSTING
Temperature control
Gas pressure
Gas type
Y
Br
Or
W
P
OUTGOING WATER
THERMISTOR
HEAT EXCHANGER
THERMISTOR
BY-PASS FLOW
CONTROL DEVICE
WATER FLOW
CONTROL DEVICE
COMBUSTION FAN
P
THERMAL FUSE
OVERHEAT
SWITCH
QS
WATER FLOW
SENSOR
FLAME ROD
MODULATING
G
1
F
77
BC-70-2A OR
MC-91-1A
Y
R
Br
W
1
5
G
Or
R
R
COLOR CODING
W :White
Bk:Black
Br:Brown
R :Red
B :Blue
Y :Yellow
P :Pink
Or:Orange
Gr:Green
Gy:Grey
AC230V/50Hz
BBr
Gr/Y
GND
B
Y
ANTI-FROST HEATER
2
33
FROST SENSING
SWITCH
F
1
Y
Y
Y
MC-70-2A OR
MC-91-1A