Unigas RG75 Manual Of Installation - Use - Maintenance page 33

Light oil burners

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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.

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.

ROUTINE MAINTENANCE

Check and clean the cartdrige of the fuel filter, replace it if necessary (see next paragraph);

carefully check the fuel flexible hoses for leaks;

check and clean the filter on the fuel pump: bilter 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;

check and carefully clean the flame detection photoresistor, if necessary replace it and, if in doubt, check the detection current fol-

lowing the diagram on the manual;

clean and grease levers and rotating parts.

Light oil filter maintenance

For correct and proper servicing, proceed as follows:

cutoff the required pipe section;

unscrew the filter cup;

remove the filtering cartridge, wash it with gasoline; if necessary, replace it; check the tightening

O-rings and replace them if necessary;

replace the cup and restore the pipe line.

PART IV: MAINTENANCE

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