Connection and wiring diagram – internal connections
A1
Main PCB
X...
Electrical interfaces
§
Boiler water temperature sen-
sor
aA
Ionisation electrode
aG
Flue gas temperature sensor
fJ
Temperature limiter
gF
Ignition unit
a-Ö
Fan motor
a-Ö A Fan motor control
a:Ö
Modulation coil
a:Ö A Modulation coil
Designs
129