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PART IV: MAINTENANCE
Gas filter maintenance
To clean or remove the filter, proceed as follows:
1 remove the cap unscrewing the fixing screws (A);
2 remove the filtering cartridge (B), clean it using water and soap, blow it
with compressed air(or replace it, if necessary)
3 replace the cartridge in its proper position taking care to place it
inbetween the guides as not to hamper the cap replacement;
4 be sure to replace the "O" ring into its place (C) and replace the cover
fastening by the proper screws (A).
WARNING: Before opening the filter, close the manual cutoff valve downstream the filter and bleed the gas; check
that inside the filter there is no pressurised gas.
Removing the combustion head
Remove the burner cover C.
Unscrew the screws V holding in position the
manifold G and pull out the complete group as
shown in the picture.
Note: for the subsequent assembly carry out the
above described operations in the reverse order,
checking the correct position of the OR ring.
Replacing the ignition electrodes
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), otherwise the boi-
ler's operation would be compromised. Check the electrodes position after any intervention on the combustion head.
To replace the electrodes, proceed as follows:
1
remove the burner cover C;r
2
disconnect the electrodes cables;
3
emove the combustion head referring to paragraph "Removing the combustion head";
4
unscrew VE screws that fasten the electrodes (see next pictures)
5
remove the electrodes and replace them referring to the measures indicated in the previous paragraph;
6
reconnect the electrodes cables;
7
replace the combustion head;
8
replace the burner cover.
C
A
AR
V
G
VRT
OR
38
B
C
C
V
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