3.4
Electrical diagram
Fig.4
Electrical wiring diagram
X23
X37
X36
X22
X20
X24
X10
X11
X12
X13
X1
X2
X3
b
w
r
g g
g
r
r
g
b
g
b
g
br bk
b
b
g
g
r
r
br
b
g/y
bk
r
g/y
g/y
g/y
g/y
br
br
w
X31
br
br
bk
bk
PN-0000341
B
C
D
E
F
G
H
I
J
K
L
N
M
b
br
b
b
O
A
P
1
2
5
6
7
8
9
10
3
4
L
N
E
M1
M2
b
bk
bk — black
br — brown
b — blue
g — green
r — red
w — while
g/y — green/
yellow
Key
Description
Key
Description
A
Gas valve
I
Spark ignition electrode
B
Hall effect sensor
J
Diverter valve motor
C
Flue sensor
K
Pump
D
Hydraulic pressure switch
L
Terminal strip
E
Heating return sensor
M
Fan
F
Heating flow sensor
N
Safety thermostat
G
DHW NTC sensor
O
Earth point on boiler chassis
H
M2 low voltage external control connection P
Printed circuit board (PCB)
3 Technical specifications
18
