83
EN
– remove the four screws (3) and remove the front panel (4) from
the combustion chamber (6) working carefully so as not to
damage the gasket or the panel insulation
5 6
7
8
Fig. 57
– if there is any dirt on the heat exchanger (7) fins, protect the
burner elements (8) covering them with a sheet of newspaper
or a cloth and brush the heat exchanger (7) clean.
8.3.2 Cleaning the burner
The burner does not require any particular maintenance simply
dust it with a soft brush.
8.3.3 Checking the ignition/detection electrode
Check the state of the ignition/detection electrode and replace if
necessary. Check the measurements as per the drawing whether
the ignition/detection electrode is replaced or not.
=
=
3,5mm
-0,5
Fig. 58
m
CAUTION
The position of the electrode is essential for the correct
detection of current ionization.
8.3.4 Final operations
After having cleaned the heat exchanger and the burner:
– remove any carbon residue using a vacuum cleaner
– check that the gasket and the insulation of the front panel (6) of
the combustion chamber and the gasket (13) of the front panel
(4) of the sealed chamber are all integral. If they are not, re
-
place them
–
refit the panels (6) and (4) securing them with fastening screws.
3
4
13
Fig. 59
8.4 Checks
8.4.1 Checking the smoke duct
It is recommended that the user checks that the combustion air
inlet duct and smoke outlet duct are integral and airtight.
8.4.2 Checking the expansion vessel pressure
It is recommended that the expansion vessel on the water side is
drained and that the prefilling pressure is not less than
1 bar
. If
this is not the case, pressurize it to the correct value (see section
"Expansion vessel").
Once the checks described above have been completed:
– refill the boiler as described in section "REFILL operations"
– start the boiler up and carry out a smoke analysis and/or
measure the combustion efficiency
– refit the front panel securing it with the two screws which were
removed previously
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