Unigas HR512A, Инструкция по установке, использованию и обслуживанию

Страница: 46 / 56

PART IV: MAINTENANCE
46
9.2 Replacing the spring in the gas valve group
9.3 Light oil filter maintenance
9.4 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 connectors E .
4 Some models are provided with the T baffle. Move the gas manifold ahead and remove the baffle.
5 Pull out the complete group as shown in the picture below.
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.
9.5 Electrodes Adjustment
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.
For correct and proper servicing, proceed as follows:
1
cutoff the required pipe section;
2 unscrew the filter cup;
3 remove the filtering cartridge, wash it with gasoline; if necessary, replace it; check the tightening
O-rings and replace them if necessary;
4 replace the cup and restore the pipe line.
1
3
SKP Siemens actuator
E
V
H
G
T
G