Unigas URB40, Руководство по установке, использованию и обслуживанию

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PART IV: MAINTENANCE
32
Removing the combustion head

Check the gas lances positioning on their reference, in order to re-establish the same positioning later

Close the manual valves (MV) at the gas flexible hoses inlet

Remove the gas pilot (GP) after having disconnected the flexible hoses.

Remove the gas lances (GL) after having disconnected the flexible hoses

Remove all the electrical connections.

Remove the flame detector out of its holder (FSH)

Loosen the (V) screws that fasten the top plate P

Remove the top plate (P) and the gas pilot (the operation is simplified by the internal support with guide)

Clean the combustion head by means of a vacuum cleaner; scrape off the scale by means of a metallic brush.
To assemble the combustion head, reverse the operations described bove
GP
GP
FSH
GL
GP
GL
FSH
V
P
MV
H
Keys
FSH
flame scanner holder
GP Gas pilot
GL Gas lances
MV manual valve
P top plate
V screws
H lance reference ring