upper bracket (7). Push the sides (3) and
(4) upwards freeing them from the not-
ches in the frame (2).
4.7 CLEANING
AND
MAINTENANCE
Carry out the cleaning of the generator in
the following way:
– Remove the electricity supply to the boi-
ler and close the gas supply tap.
– Disassembly the casing as described in
point 4.6.
– Disassembly the burner - gas manifold
group (fig. 32).
– Clean direct a stream of air towards the
inner part of the burner to blow out any
dust that has accumulated.
– Then clean the heat exchanger removing
dust and combustion deposits.
– In cleaning the heat exchanger and that
of the burner, chemical products or steel
brushes must never be used.
– Make sure that the top perforated part
of the burners is free of encrustations.
– During the assembly and disassembly of
t he bur ner it is r ecommended t hat
attention be paid to the ignition and
detection electrodes.
– Reassemble the parts removed from the
boiler, observing the succession of the
phases.
– Check the functioning of the main burner.
– After the assembly all the gas connec-
tions must be checked for the seal, using
soapy water or specific products, avoi-
ding the use of naked flames.
Preventive maintenance and checking of
efficient operation of equipment and
safety devices must be carried out exclu-
sively by authorized technical personnel.
4.7.1
Chimney sweep function
To carry out the verification of combustion
in the boiler turn the selector and stop on
the position ( ) until the green/ orange led
starts to flash intermittently (fig. 34).
From that moment the boiler will start func-
tioning in heating mode at the maximum
power, with switching off at 80°C and
restarting at 70°C.
Before activating the chimney sweep func-
tion make sure that the radiator valves or
eventual zone valves are open.
The test may be carried out also during hot-
water service functioning.
To do so it is enough, after having activated
the chimney sweep function, to take some
hot water from one or more cocks.
Even in this condition the boiler functions at
the maximum temperature always with the
primary controlled between 80°C and
70°C. During the entire duration of the
testing the hot water taps must remain
open.
After verifying the combustion the boiler
should be switched off by placing the selec-
tor on the OFF position; then return the
92
IT
ES
PT
GB
2
3
1
4
1
5
1
6
7
Fig. 33
KEY
1
Screws
2 Frame
3 Left side
4
Right side
5 Front panel
6 Side panel
7 Upper
bracket
Summary of Contents for Format 25
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