Unigas C85A, Manual Of Installation - Use - Maintenance

Page: 36 / 56

PART IV: MAINTENANCE
36
Gas filter maintenance
Removing the combustion head
Adjusting the electrodes
Important Note: Check the ignition and detection electrodes after removing/adjusting the combustion head.
Replacing the electrodes
To replace the electrodes:

Remove the cover

Disconnect the electrode cables

Loose the screws

Remove and replace the electrodes, observing the electrodes position (see previous paragraph).
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.

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.
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.
ATTENTION: avoid the ignition and detection electrodes to contact metallic
parts (blast tube, head, etc.), otherwise the boiler’s operation would be com-
promised. Check the electrodes position after any intervention on the com-
bustion head.
C B A
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).
OR
V G C
VRT
AR
Detection electrode
(if provided)
Earth electrode
Ignition electrode
E165A