Unigas G400A - PART III: OPERATION; Service level

PART IV: MAINTENANCE
46
Gas filter maintenance
Adjusting the gas valves group and removing the filter
WARNING: 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.
CBA
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).
Prese di pressione
0 Coperro
A
A
B
B
C
C
D
D
E
F
F
E
1,3,4,6 T
2 Arre
5
T
1
3
p
e
0

p
a
5
p
Br
0
3
p
e

p
a
6

5
p
Br
1
1
0
5
3

6
2
2
Prese di pressione
MB-DLE
415 - 420 B01
MB-DLE
405..412
0, 1, 2, 3, 4, 5

2
p
e

p
Br
2
p
e
3
p
a

p
Br
5

03
p
a
2
3

5
0
 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
max.
= 360 mbar.
Bouchon à vis G 1/8
0 Filter cover
1, 3,4 , 6 Screw plug G 1/8
2 Meter connection
5 Screw plug M14
Pressure taps Pressure taps