Routine Maintenance - Unigas HTLX 1025.1 Installation Manual

ROUTINE MAINTENANCE

Check and clean the gas filter cartridge, if necessary replace it (see next paragraghs);
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Check and clean the fuel filter cartdrige, replace if necessary.
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Check and clean the filter inside the light oil pump: filter must be thoroughly cleaned at least once in a season to ensure correct
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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 repla-
ced. An external filter should always be installed in the suction line upstream of the fuel unit.
Check the fuel hoses for possible leaks.
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Remove, check and clean the combustion head (see page 42);
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Check ignition electrodes, clean, adjust and, if necessary, replace them (see page 44);
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Check and carefully clean the UV detector, replace it if necessary; if in doubt, check the detection current, once the burner starts up
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(see on page 44).
Remove and clean the fuel nozzle
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maintenance operations after the burner reassembly, light the flame and check its shape, replacing the nozzle whenever a questio-
nable flame shape appears. Whenever the burner is used intensely, we recommend preventively replacing the nozzle at the start of
each heating season.
Clean and grease sliding and rotating parts.
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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.
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.
Gas filter maintenance
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.
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 Or ring into its place (C) and replace the cover fastening by the proper screws (A).
(Important: cleaning must be performed using solvent, not metal tools!). At the end of
A
B
41
PART III: MAINTENANCE
C