Worcester 26CDi XTRA Installation And Servicing Instructions page 11

Fig. 9. Mains electricity connections.
230V
N Ns
L
ST12
Brown
Blue
Strain relief clamp
Fig. 10. Wiring diagram.
L
L
R
S
Green/yellow
CH sensor
Spark
electrode
Pump
Spark
transformer
Control Board
ST12 ST8
ST15 ST1
Link
Mains in
Fan electrical connections
Black
White
Fan
Red
Overheat
cut-off
device
Flame sense
electrode
Gas valve
Reg
Main
Main
DHW
sensor
Flow
switch
ST16
1
2
2 blue
pink
2 yellow 2 orange
2 green
2 brown
2 red
2 violet
white
11
1
4
3
1
Air pressure
switch
3