Boiler Internal Wiring - Baxi Bermuda BBU 15 HE Installation & Servicing Instructions Manual

Discharge Float
Switch
X900
X501
X500
X1
br
br
b
br
2
1
b
y
2
1
20
© Baxi Heating UK Ltd 2009
Central Heating
NTC Flow Sensor
gr gr
Safety Float
Switch
bk
bk
gr
gr
bk
bk
bk bk
X400
9 8 7 6 5 4 3 2 1
X300
Control PCB
1 2 1 2 3 4 5
X2
b
br
bk
br
b
ON/OFF
b
Reset
3
N
bk
3
N
Mains Input
(Permanent Live to 3,
Switched Live to 1)
Overheat Thermostat
b
r
X401
8 7 6 5 4 3 2 1
10 9
1 2 3 4 5 6 7 8 9
X3
y
b
br
bk
bk
b
b
b
br
Spark
b
a
Generator
r r
Ignition
Electrode
b
y
g
br - brown
g/y
bk - black
r
b - blue
w - white gr
y - yellow

6.0 Boiler Internal Wiring

6.1 Boiler Internal Illustrated Wiring Diagram
1
4
2
br b 5
g
bk
3
1
2
b
g/y
br
r
Condensate Pump
Gas Valve
- green
- green / yellow
- red
- grey
Fan
bk
bk