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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
Clean and examine the gas filter cartridge and replace it if necesssary (see next paragraph);
Remove and clean the combustion head (see page 41);
Examine and clean the ignition electrodes, adjust and replace them if necessary (see page 43);
Examine and clean the detection electrode/photoelement (according to the burner models), replace it if necessary (see page 45),
in case of doubt, check the detection circuit, after the burner start-up (see page 45);
Cleane and grease leverages and rotating parts.
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.
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 "O" ring into its place (C) and replace the cover fastening by the proper screws (A).
Inspection and replacement of the MULTIBLOC DUNGS MBC..SE filter (Threaded valves group)
Inspect the filter at least once a year.
Change the filter, if pressure value between pressure connections 1 and 2 is grea-
ther than 10 mbar.
Change the filter, if pressure value between pressure connections 1 and 2 is twice
as high compared to the last inspection.
1. Interrupt gas supply: close ball valve
2. Remove screws 1-2
3. Replace the filter insert 3
4. Screw in screws 1-2 without use force to fasten.
5. Perform leakage and funcion test.
6. Pay attention that dirt does not fall inside the valve.
Space requirements for fitting filter, A: from 150 to 230 mm.
PART III: MAINTENANCE
A
B
Fig. 29
41
C
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