M039150CF
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.
ROUTINE MAINTENANCE
z
Check and clean the gas filter cartdrige (see Fig. 36), replace it if necessary;
z
Check and clean the light oil filter cartdrige, replace it if necessary;
z
Check for condition of the light oil pipes, verify for possible leaks;
z
Check and clean the filter on the 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 replaced;
z
Remove, check and clean the combustion head (page 38);
z
Check the ignition electrodes, clean and eventually adjust it, if necessary replace it (page 39);
z
Remove and clean the oil nozzle (Important: use solvents for cleaning, not metal utensils) and at the end of the maintenance pro-
cedures, after replacing the burner, turn it on and check the shape of the flame; if in doubt replace the nozzle. Where the burner is
used intensively it is recommended to replace the nozzle as a preventive measure, at the begin of the operating season.
z
Check and carefully clean the UV detector, replace it if necessary; if in doubt, check the ionization current, after having started the
burner, following the directions in Fig. 40.
z
Clean and grease joints and rotating parts.
Removing the filter in theMULTIBLOC DUNGS MB-DLE 415 - 420 B01 1” 1/2 - 2”
z
Check the filter at least once a year!
z
Change the filter if the pressure difference between pressure connection 1 and 2 (Fig. 36-Fig. 37)
Δ
p> 10 mbar.
z
Change the filter if the pressure difference between pressure connection 1 and 2 (Fig. 36-Fig. 37) 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 ÷ 6 (Fig. 38).
3
Change filter insert.
4
Re-insert filter housing, screw in screws 1 ÷ 6 without using any force and fasten.
5
Perform leakage and functional test, p
max.
= 360 mbar.
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.
Fig. 36
Fig. 37
Fig. 38
PART III: MAINTENANCE
2
3
4
2 3
4
1
5
5
0
1
3
p
e
0
4
p
a
5
p
Br
0
3
p
e
4
p
a
6
1
5
p
Br
2
B
A
C
D
E
