Green Heating Technology
30
Venting the primary exchanger
When commissioning the boiler, we recommend to check that there is no air in the primary circuit of
the combustion unit. Do this operation also during the combustion unit cleaning, if you hear the typical
air bubble noise.
f
Locate the
combustion unit manual venting valve
(item
8
in the following picture) and, to avoid wet
-
ting the boiler inside, insert a length of flexible hose, with suitable diameter, on its fitting, then direct
the other end towards a drain (or a container to collect the anti-freeze solution);
f
start the "circuit venting" mode by activating the
Parameter 07
(see "Main boiler parameters (PC)"
on page 32);
f
slowly open the venting valve
8
and restore the system pressure when necessary;
f
when no more air comes out from the venting valve
8
, close the valve and reset the
parameter 07
to
0
;
f
restore the system pressure and, if needed, the concentration of additive liquid.
Combustion group cleaning and check
Switch off the boiler and disconnect it
from the electrical supply.
Be sure that the parts are not hot and
eventually wait the time necessary to cool
them;
Because some contacts with the fine dust
and acid condense may occur, we recom-
mend to wear the proper devices for the
personal protection (i.e. glasses, gloves,
masque)
Warning: do not wash or damage the in
-
sulating coverings inside the combustion
chamber�
The replacement of gasket on the ends of
the pipe 04 is mandatory. Please get the
original spares.
f
Open the sealed chamber;
f
disconnect the two connectors
2
from the fan;
f
disconnect the connector
10
from the ignition/
detection electrode
11
�
Attention:
do not dis-
mount the electrode from the combustion group
;
f
remove the fastening clip
3
; unscrew the nut
5
which fixes the gas pipe
4
to the gas valve; pull
out the gas pipe
4
from the fan/air-gas-mixer assembly;
f
loosen the clamp
10
and pull the flexible air intake hose
11
out from the fan;
6
7
9
8
14
13
10
12
11
1
2
4
5
3
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