Unigas HR93A, Руководство по установке, использованию и обслуживанию

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C.I.B. UNIGAS - M039213CB
41
Inspection and replacement of the MULTIBLOC DUNGS MBC..SE filter (Threaded valves group)
Replacing the spring in the gas valve group
To replace the spring in the gas valve group,proceed as follows:
1 Carefully twist the protection cap 1 and the O-ring 2.
2 remove the “set value” spring 3 from housing 4.
3 Replace spring 3.
4 Carefully insert the new “set value” spring. Pay attention to mount properly. First insert the spring part with smaller diameter in the
housing.
5 Place O-ring 2 in protective cap 1. Screw in the protective cap with the O-ring in it.
6 Stick the adhesive label for spring identification on the type plate.
Removing the combustion head
1 Remove the top H .
2 Remove the UV detector out of its housing: disconnect electrode cables and the light oil flexible hoses.
3 Loosen the screws V holding the gas manifold G , loosen the two connectors E and remove the assembly as shown.
4 Clean the combustion head by means of a vacuum cleaner; scrape off the scale by means of a metallic brush.
Note: to replace the combustion head, reverse the operations described above.
Inspect the filter at least once a year.

Change the filter, if pressure value between pressure connections 1 and 2 is grea-
ther than 10 mbar.

Change the filter, if pressure value between pressure connections 1 and 2 is twice
as high compared to the last inspection.
1. Interrupt gas supply: close ball valve
2. Remove screws 1-2
3. Replace the filter insert 3
4. Screw in screws 1-2 without use force to fasten.
5. Perform leakage and funcion test.
6. Pay attention that dirt does not fall inside the valve.
Space requirements for fitting filter, A: from 150 to 230 mm.
Fig. 32
DUNGS MBC..SE SKP Siemens actuator
3
1
2
4
4
1
1
3
E
V
H
G
V
G