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18 IGNITION / DETECTION ELECTRODE
AND BURNER
Electrodes disclaimer .
Note to service engineers: It is required that the
burner seal, lip seal and mixing chamber seal along
with the flame detection electrode are inspected
every year and replaced every 24 months . Failure
to inspect the flame detection probe, seals and re-
place as required may render the guarantee void .
18 .1 Function
The ignition / detection electrode "1" is fitted on the left side of the
fan-burner group "4".
1
2
5
3
Figure 18 .1
The burner "6" is fitted on the rear of the fan-burner group "4".
Figure 18 .2
- 42 -
IGNITION AND DETECTION ELECTRODES
4
6
18 .2 Removal of the ignition / detection elec-
trode
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove all the case panels (see section "2 General access
and emptying hydraulic circuits" on page 5).
2 Disconnect the electrode connector "1" and the earth wire "3"
(Figure 18.1).
3 Unscrew the screws "2" and remove the electrode "1".
4 Assemble the ignition / detection electrode carrying out the
removal operation in reverse order.
Warning: A new sealing gasket must be used during
refitting of the electrodes on all occasions of re-
moval .
18 .3 Removal of the front insulation panel
See warning note at the end of this chapter before to remove
this part .
1 Remove the ignition / detection electrode (see section "18.2
Removal of the ignition / detection electrode" on page 42).
5
2 Remove the front insulation panel by sliding it forward (Figure
18.3).
3 Assemble the new front insulation carrying out the removal
operation in reverse order. When fitting the new panel ensure
that the electrode hole coincide with the hole of the combus-
tion chamber.
Figure 18 .3
Caution:
After any periodical servicing or disturbance the combustion
chamber silicon seal (Figure 18.3) must be fully inspected and
replaced at the discretion of the service engineer.
After any disturbance to the chamber door seal the appliance
must undergo a full analytical combustion performance check.
18 .4 Removal of the burner
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove the air box and the fan (see section "17.2 Removal
of the Air box and the Fan" on page 41).
2 Remove the Ignition and detection electrodes (see section
"18.2 Removal of the ignition / detection electrode" on page
42).
Siliconic
gasket
Front insulation
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