Unigas HRX92R-FGR EA Manual Of Installation - Use - Maintenance page 54

PART IV: MAINTENANCE
Adjusting the gas valves group and removing the filter
MULTIBLOC DUNGS MB-DLE 405..412
Check the filter at least once a year!

Change the filter if the pressure difference between pressure connection 1 and 3 (Fig. 1-Fig. 3)is p > 10

mbar.
Change the filter if the pressure difference between pressure connection 1 and 3 (Fig. 1-Fig. 3) 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. 5.
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
6 Pay attention that dirt does not fall inside the valve.
6
5 3 4
DUNGS MB-DLE 415 - 420 B01 1" 1/2 - 2"
Check the filter at least once a year!

Change the filter if the pressure difference between pressure connection 1 and 2 (Fig. 1-Fig. 2) p> 10 mbar.

Change the filter if the pressure difference between pressure connection 1 and 2 (Fig. 1-Fig. 2) 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. 3).
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
6 Pay attention that dirt does not fall inside the valve.
5
4 2 3
= 360 mbar.
max.
2
1
0
Fig. 34
4 3 5
= 360 mbar.
max.
0
1
Fig. 37
6
5
D
3 2 4 A
A
54
Fig. 35
1
2
Fig. 36
5
3
6
4
Fig. 38
E
E
Fig. 39
D
C
B C
B