MAINTENANCE INSTRUCTIONS
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
57
6.6.3 Trasformer
(fig. 1)
Switch off the power supply;
Un-plug the ignition electrode cable and
the plug connecting the cable and the
printed circuit board;
Slacken the fixing screws securing the
support plate;
Replace the transformer;
Reconnect the wires and re-assemble
the components following the above
procedure in reverse order;
Switch on the power supply and restart
the appliance;
6.6.4 Electric fan
(fig. 2)
Switch off the power and gas supplies to
the boiler;
Remove and dismantle the entire burner
unit
(see 6.6.1 “Cleaning the main
exchanger module and combustion
unit”
);
Unscrew the four nuts securing the
electric fan to the gas manifold and then
remove the electric fan;
Unscrew the fixing screws from the
venturi and remove the electric fan,
paying particular attention not to
damage the cork gasket;
Replace the electric fan and re-assemble
the components following the above
procedure in reverse order;
Switch on the electricity, water and gas
supplies and check the soundness of the
joint by measuring the CO
2
levels
(see
“5.5.1 Max power supply regulation- CO
2
value”)
electric fan
Fig. 2
venturi
burner
premix
burner unit
primary heat
exchanger
ignition
electrode
detection
electrode
transformer
Fig. 1
