C.I.B. UNIGAS
- M039203CC
28
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.
ROUTINE MAINTENANCE
z
Check and clean the gas filter cartridge, if necessary replace it (see next paragraghs);
z
Check and clean the fuel filter cartdrige, replace if necessary.
z
Check and clean the filter inside the light oil pump: filter 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 repla-
ced. An external filter should always be installed in the suction line upstream of the fuel unit.
z
Check the fuel hoses for possible leaks.
z
Remove, check and clean the combustion head (see page 29);
z
Check ignition electrodes, clean, adjust and, if necessary, replace them (see page 30);
z
Check and carefully clean the
UV
detector, replace it if necessary; if in doubt, check the detection current, once the burner starts up
(see on page 30).
z
Remove and clean the fuel nozzle
(Important:
cleaning must be performed using solvent, not metal tools!
).
At the end of
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.
z
Clean and grease sliding and rotating parts.
Removing the filter in the MULTIBLOC DUNGS MB-DLE 405..412
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Check the filter at least once a year!
z
Change the filter if the pressure difference between pressure connection 1 and 3 (Fig. 28-Fig. 29)is
∆
p > 10 mbar.
z
Change the filter if the pressure difference between pressure connection 1 and 3 (Fig. 28-Fig. 29) is twice as high compared to the last
check.
You can change the filter without removing the fitting.
1
Interrupt the gas supply closing the on-off valve.
2
Remove screws 1 ÷ 4 using the Allen key n. 3 and remove filter cover 5 in Fig. 30.
3
Remove the filter 6 and replace with a new one.
4
Replace filter cover 5 and tighten screws 1 ÷ 4 without using any force and fasten.
5
Perform leakage and functional test, p
max.
= 360 mbar.
6
Pay attention that dirt does not fall inside the valve.
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..
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.
PART III: MAINTENANCE
