Part Iii: Maintenance; Routine Maintenance; Light Oil Filter Maintenance - Unigas RG515 Manual Of Installation - Use - Maintenance

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 (page 32); when reassembling, carefully observe the measures on page 33;

check the ignition electrodes and their ceramic insulators, clean, adjust and replace if necessary page 33;

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 scheme in Fig. 30;

clean and grease levers and rotating parts.

Light oil filter maintenance

For correct and proper servicing, proceed as follows:
1 shut off fuel in the line section being serviced;
2 unscrew the tray;
3 remove the filter cartridge from its support and wash it with petrol or replace if necessary; check seal O-Ring, replace if necessary;
4 reassemble the tray and restore fuel flow.

PART III: MAINTENANCE

31