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4 - MAINTENANCE
4.1 - General cautions
CAUTION !!!
Maintenance must be
performed by a qualified installer, service agency or
the gas supplier.
Maintenance should be carried out at least once a
year, before the start of the winter season
4.2 - Cleaning the burner
and the heat exchanger
(flue-gas side)
To correctly clean the burner and the heat
exchanger (flue-gas side) proceed as follows
(referring to figures 46 and 47):
disconnect the heater from the electricity
supply;
shut off the gas supply;
remove the heater panels;
remove blower “B”;
disconnect the cables from the ignition and
detection electrodes;
disassemble burner “A”;
in the opening created by removing the burner,
place a collector for the soot that may drop from
the combustion chamber;
disconnect the intake and discharge pipes from
the heater, by means of the fittings “2” and “3”;
remove the top cover “5”. Be careful with the
seal between the combustive air circuit and the
flue gas circuit;
remove turbulators “6”;
pass a cylindrical brush, with plastic bristles,
inside the flue gas pipes (the pipes in which
turbulators “6” were installed) and brush
turbulators “6”;
using a vacuum cleaner, remove the unburnt
residues from the burner and from the ignition
and flame control electrodes. Also vacuum the
inside of the combustion chamber;
clean the surface of burner “H” on which
combustion takes place. This surface must first
be washed with running water, then blown with
compressed air at a pressure between 45 and
116 psi (3 and 8 bar);
CAUTION !!!
Clean the burner in a position
that avoids the risk of water splashing on the
heater and/or on any electrical appliance or
equipment that is vulnerable to moisture and/or
water.
clean air filter “7”;
reassemble the components, carrying out the
above steps in reverse order;
open the gas cock;
reconnect the normal electricity supply;
check for any gas leaks between the fittings
that were removed previously, and in particular
the connection of fan “B” and burner “A”
Figure 46 - Disassembling the upper part of
the heat exchanger
Figure 47 - Disassembling the lower part of
the heat exchanger
