Unigas R1025, Руководство пользователя

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PART IV: MAINTENANCE
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6.2 Replacing the spring in the gas valve group
6.3 Removing the combustion head
z
Remove the cover C .
z
remove the electrodes cables;
z
unscrew the 3 screws V which hold in position the gas manifold G and pull out the complete group as shown in the picture below.
z
Clean the combustion head by a compressed air blow or, in case of scale, scrape it off by a scratchbrush.
Note: to replace the combustion head reverse the procedure described above having care to place correctly the O ring ( OR ) between
burner and gas manifold.
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.
Fig. 14
Key
VRT Head adjusting screw
AR Threaded rod
V Fixing screw
G Gas manifold
OR ”O” ring
C Cover
1
3
SKP Siemens actuator
V
C
G AR
OR
VRT
C
AR
G