MAINTENANCE INSTRUCTIONS
43
heating
sensor
safety
thermostat
Part replacement
:
Ignition and/or flame detection electrodes
(see fig. 1)
•
Un-Plug the electrode wires;
•
Slacken the fixing screws;
•
Remove the electrodes. When fitting the new ones,
check that the seals are not damaged. Replace if
necessary;
•
Reconnect
the
wires
and
re-assemble
the
components following the above procedure in
reverse order;
•
Switch on the power supply and restart the
appliance;
If the boiler does not restart, check the positions of
the electrodes (especially the ignition electrode).
Make sure that original position and distances
between the electrodes and the burner are
respected to avoid a boiler malfunction).
Safety thermostat
(see fig. 2)
•
Disconnect the connecting wire;
•
Unscrew the fixing screws and remove the
thermostat;
•
Replace the thermostat and re-assemble the
components following the above procedure in
reverse order;
•
Switch on the electricity, water and gas supplies
and restart the appliance.
Heating sensor
(see fig. 2)
•
Un-Plug the connecting wire;
•
Replace
the
sensor
and
re-assemble
the
components following the above procedure in
reverse order;
•
Switch on the electricity, water and gas supplies,
open the shut-off valves and fill the central heating
circuit. Then restart the appliance, remembering to
discharge any air that may be trapped in the
system;
Fig. 2
Fig. 1
ionisation
electrode
ignition
electrode
