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figure 18 .4
before reassembling ensure the burner gasket is correctly
located .
warning: after cleaning or replacement as detailed
above, it is deemed necessary to undertake a com-
bustion analysis as detailed in section "adjust-
ment" page 32 .
18 .4 removal of the front insulation panel
see warning note at the end of this chapter before to remove
this part .
1 Remove the Ignition and detection electrodes (see section
"Removal of the Ignition and detection electrodes" page 43).
2 Remove the burner (see section "Removal of the burner"
page 43).
3 Remove the front insulation panel (Figure 18.5).
4 Assemble the new front insulation carrying out the removal
operation in reverse order. When fitting the new panel ensure
that the electrodes holes coincide with the holes of the com-
bustion chamber.
front insulation
figure 18 .5
caution:
After any periodical servicing or disturbance the combustion
chamber silicon seal (Figure 18.5) and the Air-gas duct gasket
(Figure 18.6) must be fully inspected and replaced at the discre-
tion of the service engineer.
- 44 -
IgnItIon and detectIon electrodes
burner gasket
Air--- gas duct gasket
Siliconic gasket
After any disturbance to the chamber door seal the appiance
must undergo a full analytical combustion performance check.
figure 18 .6
18 .5 removal of the rear insulation
see warning note at the end of this chapter before to remove
this part .
attention: cover the inner of the condensing heat
exchanger to avoid that dirt and debris fall in the
coil .
1 Do the operations of section "Removal of the burner" page 43
from step 1 to step 3.
2 Remove the insulation K by pulling it towards the boiler front
(Hung it with a screwdriver tip) (Figure 18.7).
K
figure 18 .7
18 .6 checks
Check of the spark generator
warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
There is not a significant way to verify the integrity of the spark
generator. When the fan turns but the burner does not light a
possible cause is a faulty spark generator and it is advisable to
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