37
– 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. 40
– 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.
= =
3,5
+0,5 -0,5
Fig. 41
m
caUtion
the position of the electrode is essential for the correct
detection of current ionization.
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, replace them
– refit the panels (6) and (4) securing them with fastening
screws.
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, replace them
– refit the panels (6) and (4) securing them with fastening
screws.
3
4
13
Fig. 42
8.4
checks
8.4.1 checking the flue
Check that the flue is undamaged and complete.
8.4.2 checking the expansion vessel pressure
Close the flow and return valves and drain the boiler. Check
the expansion vessel 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 "system filling"
– refit the front panel securing it with the two screws which
were removed previously
– start the boiler up and carry out a smoke analysis and/or
measure the combustion efficiency.
8.4.3 system inhibitor concentration
Check and if required correct the inhibitor concentration.
once the checks described above have been completed:
– refill the boiler as described in section "system filling".
8.5
burner pressure test
Using the procedure shown in section "automatic calibration
procedure" page 34 and if required adjust the burner
pressures.
once the checks described above have been completed:
– refit the front panel securing it with the two screws which
were removed previously
– complete the service record in this manual.
m
caUtion
the heating systems installed in mobile homes,
caravans and park homes may be filled with anti
freeze.
it is important that the correct concentration is
maintained.
