Unigas R91 VS Series, Manual Of Installation - Use - Maintenance

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PART III: MAINTENANCE
31
At least once a year carry out the maintenance operations listed below. In the case of seasonal servicing, it is recommended to carry
out the maintenance at the end of each heating season; in the case of continuous operation the maintenance is carried out every 6
months.
PERIODICAL SERVICING ПЕРИОДИЧЕСКИ

Cleaning and examining the gas filter cartridge, if necessary replace it (see next paragraphs).

Removal, examination and cleaning of the combustion head (see Fig. 60)

Check of ignition electrode, cleaning, adjustment and, if necessary, replacement (see page 66)

Check of detection electrode, cleaning, adjustment and, if necessary, replacement; in case of doubt, check the detection circuit fol-
lowing the diagram in Fig. 64 and Fig. 66, after turning the burner back into operation.

Cleaning and greasing of leverages and rotating parts.
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: ALL OPERATIONS ON THE BURNER MUST BE CARRIED OUT WITH THE MAINS DISCONNECTED AND
THE FUEL MANAUL CUTOFF VALVES CLOSED!
ATTENTION: READ CAREFULLY THE “WARNINGS” CHAPTER AT THE BEGINNIG OF THIS MANUAL.
ATTENTION when servicing, if it was necessary to disassemble the gas train parts, remember to execute the gas proving
test, once the gas train is reassembled, according to the procedure imposed by the law in force.
ATTENTION: 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.
A
B C
PART III: MAINTENANCE
TTENZIONE