Unigas HP60, Manual Of Installation - Use - Maintenance

Page: 43 / 60

C.I.B. UNIGAS - M03957CI
43
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 Disconnect the electrode cables CE .
3 Remove the UV detector out of its housing: disconnect electrode cables and the light oil flexible hoses.
4 Loosen the screws S holding the VR group: screw the VR screw in order to loose the threaded rod C .
5 Loosen the screws V holding the gas manifold G , loosen the two connectors E and remove the assembly as shown.
6 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.
DUNGS MBC..SE SKP Siemens actuator
3
1
2
4
4
1
1
3
H
V
E
V
E
CE
H
G
C