MAINTENANCE
Carry out periodic analysis of the
exhaust combustion gas, checking the
emissions.
Periodically replace the gas filter when
dirty.
Check that all the components of the
combustion head are in a good state,
not deformed by the temperature and
free from impurities or deposits from
the installation environment or by poor
combustion and check also the electro-
des are working efficiently.
If the combustion head needs to be
cleaned, remove the components fol-
lowing the procedure indicated below:
Unscrew the two screws (2) and turn
the burner around the pin (1) in the hin-
ge (figure 1).
After pulling out the ignition and ionisa-
tion cables (3) from the terminals of the
respective electrodes, unscrew com-
pletely the nut (4) and tighten the screw
(5), causing it to move forward inside
gas outlet connector (8) in figure 3 to a
sufficient amount to ensure successful
disassembly of the mixing unit.
With the same wrench turn the ball joint
(6) in the direction indicated with the ar-
row, unhooking the lever that moves the
combustion head forward (figure 2).
Slightly raise the gas outlet connector
(8) (figure 3). and pull out the whole
mixing assembly in the direction indi-
cated by the arrow (9) in figure 4. Com-
plete maintenance operations, proceed
with re-assembly of the combustion
head, following the above instructions
in reverse order, after having checked
the correct position of the ignition and
ionisation electrodes (see page 38).
Note: important
On closing the burner, gently pull
towards the electrical panel, putting
them slightly in tension, the two ignition
and ionisation cables, and then arran-
ge them in their places (7) as in figure
2. This will ensure that the two cables
do not get damaged by the fan during
the working of the burner.
TWO STAGE GAS-FIRED
BURNER
It is normally not advisable to connect
a burner working on a boiler for heating
water for two-flame working. The bur-
ner can also work for long periods of
time with one flame alone. The boiler
is insufficiently loaded and so come out
at too low a temperature (less than dew
point) giving rise to the presence of
condensation water in the flue. When
the two-flame burner is installed on a
boiler for the production of hot water for
heating, it must be connected in such
a way as to work normally with both
flames completely stopping, without
changing to the first flame, when the
preset temperature has been reached.
For this type of working the thermostat
for the second flame is not installed and
a direct connection is made (jumper)
between the equipment's terminals.
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figure 1
figure-2
figure-3
figura-4