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Fan
M1
Mains Voltage
Terminal Strip
1
2
3
4
5
br
b
Pump
Diverter Valve
44
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Safety
Thermostat
b g
br bk
b
X23
X3
bk
br
X10
g/y
b
b
br
X13
b
bk
br
br
b
br
b
X11
g/y
X12
g/y
Motor
Key To Wiring Colours
b - Blue
bk - Black
br - Brown
w - White
gr - Grey
Gas
Valve
Hall Effect
Sensor
Flue Sensor
b
b
w
b
r
bk
r
g
b
b
w
b
r
g br
b
b
r
X37
X36
X22
X1
X2
g/y
Spark
Ignition
Electrode
r - Red
g - Green
g/y - Green/Yellow
y - Yellow
15.0 Electrical
15.1
Illustrated Wiring Diagram
Hydraulic
Pressure
Heating
Switch
Return
Sensor
g
br
br
g
X20
X24
bk
X31
Flame
Sensing
Electrode
Heating
Flow
Sensor
DHW
NTC
Sensor
1
2
3
4
5
6
bk
7
8
9
M2
10
Low Voltage
External Control
Connection
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