PART IV: MAINTENANCE
44
8.2 Removing the filter in the MULTIBLOC 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. 28-Fig. 29)
Δ
p> 10 mbar.
z
Change the filter if the pressure difference between pressure connection 1 and 2 (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 ÷ 6 (Fig. 30).
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.
6
Pay attention that dirt does not fall inside the valve.
Fig. 29
Fig. 30
Fig. 31
B
A
C
D
E
