Potterton Promax System HE Installation And Servicing Instructions page 24

Sensing
Electrode
w
Condensate
Trap
g/y
Earth
Wiring Key
b - Blue
bk - Black
br - Brown
r - Red
w - White
g/y - Green/Yellow
v - Violet
y - Yellow
o - Orange
24
Flow Switch
bk
w
br
r
Ignition
PCB
br
bk
Spark and
Earth Electrode
Fan
bk
Control
PCB
b bk
br bk
br
b
b
br
Gas
Valve
g/y
b
g/y
Earth
9.0 Electrical
9.2 Illustrated Wiring Diagram
r
br
w
g
b
r g b
w br
w b y r
v g o bk
Connector
with blue label
r
r
bk
bk
b
br
Mains
Input
b
Pump
Interface
PCB
Flow
Temperature
Thermistor
Fan Protection
Thermostat
bk
Safety
Thermostat
Transformer
g/y
br
b
g/y