Green Heating Technology
30
11. repeat steps 4. to 10.
performing several working cycles and coil venting, both in heating and DHW
mode, until all the air has been vented from the primary coil of the storage, and the noise caused
by the air ends.
12.
adjust definitely the system pressure to the optimal value of
1.0 bar (max 1.5 bar).
Combustion group cleaning
Switch off the boiler and discon
-
nect 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 recommend to
wear the proper devices for the
personal protection (i.e. glasses,
gloves, masque)
Warning: do not wash or damage
the insulating coverings inside
the combustion chamber.
f
Open the sealed chamber;
f
disconnect the two fan connectors
10
;
f
disconnect the connectors
12
from
the ignition electrode
2
and from the
flame detection electrode
13
.
Atten-
tion:
do not dismount the electrodes
from the combustion group
;
f
unscrew the screw
6
and take away
the support
5
; unscrew the nut
7
which fixes the gas pipe
4
to the gas
valve; pull out the gas pipe from the
fan/air-gas-mixer assembly;
f
unscrew the 4 nuts
1
which fix the
burner group
14
(composed of fan,
hose and burner) to the primary ex-
changer. Remove the burner group;
9
10
11
12
13
14
1
2
3
4
5
7
8
6
00065 A 00
