9.0 Electrical
29
© Baxi Heating UK Limited 2005
9.1
Schematic Wiring Diagram
Mains Input
N
L
N
L
Pump
Gas
Valve
r
g/y
op
Spark
Electrode
External Controls
Connection
b
Filter
bk
bk
bk
bk
r
w
w
Flame
Detection
Electrode
Condensate
Trap
Diverter
Valve
Flow
Overheat
Thermostat
Fan
Overheat
Thermostat
g/y
b
b
br
bk
br
r
b
r
r
b
b
Flow
Thermistor
Return
Thermistor
325 Vdc
DC Fan
CH
Flow
Switch
DHW
Flow
Switch
gy
gy
gy
gy
w g br
PCB
Earths not shown to aid
clarity of diagram
br
g/y
g/y
g/y
r
b
br
o
Key To Wiring Colours
b - Blue
bk - Black
gy - Grey
w - White
br - Brown
op - Opaque
r
- Red
g - Green
g/y- Green/Yellow
o - Orange
y - Yellow