Unigas HR1025, Manual Of Installation - Use - Maintenance

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PART IV: MAINTENANCE
38
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.
ROUTINE MAINTENANCE

Check and clean the cartdrige of the fuel filter, replace it if necessary;

carefully check the fuel flexible hoses for leaks;

check and clean the filter on the fuel pump: filter must be thoroughly cleaned at least once in a season to ensure correct working of
the fuel unit. To remove the filter, unscrew the four screws on the cover. When reassemble, make sure that the filter is mounted
with the feet toward the pump body. If the gasket between cover and pump housing should be damaged, it must be replaced;

remove, check and clean the combustion head;

check the ignition electrodes and their ceramic insulators, clean, adjust and replace if necessary;

remove and clean the oil nozzles (IMPORTANT: do not clean the nozzles using metallic or sharp utensils, use only solvents or
steam); at the end of maintenance operations, refit the burner, turn it on and check the combustion. If in doubt, replace the defec-
tive nozzle/s. In case of intensive use of the burner, the nozzles must be replaced at the end of the working season;

examine and clean the detection electrode/photoelement (according to the burner models), replace it if necessary, in case of
doubt, check the detection circuit, after the burner start-up;

clean and grease levers and rotating parts.
Gas filter maintenance
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.
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.
PART IV: MAINTENANCE
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).