Servicing
36
Fig. î. 22 Boiler wiring diagram (low voltage)
bk black
bu blue
bn brown
gnye green-yellow
LEGEND:
A1 CONTROL BOARD WITH LCD SCREEN
IOP IGNITION AND IONIZATION ELECTRODE
MV1 FAN
Q1 PUMP
Y100 GAS VALVE
Y3 THREE-WAY VALVE
X60 MV1 fan power connector
X61 Q1 pump power connector
X101 Euro connector â the boiler power supply
X110 bonding connector
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