Unigas HTP2000 Installation Manual page 37

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
Clean and examine the gas filter cartridge and replace it if necesssary;

Remove and clean the combustion head;

Examine and clean the ignition electrodes, adjust and replace them if necessary;

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 leverages and rotating parts.

DANGER! Incorrect motor rotation can seriously damage property and injure people.ATTENTION: when servi-
cing, 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.
Gas filter maintenance
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.
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).
Light oil filter maintenance
For correct and proper servicing, proceed as follows:
1 cutoff the required pipe section;
2 unscrew the filter cup;
3 remove the filtering cartridge, wash it with gasoline; if necessary, replace it; check the tightening
O-rings and replace them if necessary;
4 replace the cup and restore the pipe line.
PART IV: MAINTENANCE
A
B
37
PART IV: MAINTENANCE
C