Baxi Potterton BBU 15 HE - Manual (Page 20)

20
© Baxi Heating UK Ltd 2009
6.0 Boiler Internal Wiring
6.1 Boiler Internal Illustrated Wiring Diagram
- brown
- black
- blue
- white
- yellow br
bk
b
w
y - green
- green / yellow
- red g
g/y
r
Control PCB
X2 X3
X9
X501
1 2 1 2 3 3 4 4 5 5 6 7 8 9
X1
1 2
Central Heating
NTC Flow Sensor
Fan
Gas Valve
Overheat Thermostat
Condensate Pump
X400 X401
bk
bk
gr
gr
b
b br
bk g
b
br
g/y
b br
br
b
bk
b
br
bk
bk
bk
b
br
b y
b
Spark
Generator
Ignition
Electrode
9 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1
12
3
4
r r
1
4
2
5
3
1
2
a b
bk
bk
- grey gr
gr gr
Safety Float
Switch
Discharge Float
Switch
ON/OFF
Reset
Mains Input
(Permanent Live to 3,
Switched Live to 1)
r
bk
bk
bk bk
r
br
br
y
b
1
N
2
3
br
1
N
2
3
y
X300
X900
X500
b
b
b