![](/images/new-backgrounds/1026235/26235103x1.webp)
16.0Electrical
16.1Illustrated Wiring Diagram
Water Pressure Switch
b
DHW NTC Sensor
g
g
b
Central Heating
NTC Sensor
Overheat Stat
Hall Effect
Sensor
r | b |
|
rb
r
w
b
b
b
Flue Sensor
|
| 1 |
|
|
| 4 |
|
|
| 2 |
|
br | b | 5 |
|
bk | g | 3 | Fan |
1
2
b
g/y
br
X400 | X401 |
9 8 7 6 5 4 | 3 2 1 | 10 9 8 7 6 5 4 | 3 2 1 |
1 2 3
4
Flame
Sensing
Electrode
4 | bk |
|
| Control PCB |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3 |
|
|
|
| br | |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2 |
|
|
|
| bk |
X501 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
|
|
|
| b |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| X9 | |||
1 | 2 | 1 | 2 | 3 | 4 | 5 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|
|
|
|
|
X1 | X2 | X3 |
|
|
|
|
|
|
|
| b |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| r |
| bk |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| br |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| w | ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| bk | ||||||||
|
|
|
|
|
|
|
|
|
|
|
| br |
|
|
| b |
|
| |||||||||
br |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| br |
|
|
| r |
|
|
| |||
|
|
|
|
|
|
|
|
|
|
|
|
|
| b |
|
|
|
| |||||||||
|
| b |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
| b |
|
|
|
|
| br |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Integral Timer
br
Pump
b
w
Link
g/y b
br
bk
br
b
L N | Spark |
Generator | |
b a | b |
| br |
g
w
Ignition
Electrode
bk
r
bk
Diverter Valve
Gas Valve
Mains Input Cable
r
br | - brown | g | - green |
bk | - black | g/y | - green / yellow |
b | - blue | r | - red |
w | - white |
|
|
52© Baxi Heating UK Ltd 2012