Unigas HTP90A, Installation, User'S, And Maintenance Manual, Page: 40 / 60

C.I.B. UNIGAS - M039219CA
40
Inspection and replacement of the MULTIBLOC DUNGS MBC..SE filter (Threaded valves group)
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.
Removing the oil gun, replacing the nozzle and the electrodes
To remove the oil gun, proceed as follows:
1 remove the combustion head as described on the prevoius paragraph;
2 loosen the VL screw and remove the oil gun and the electrodes: check the oil gun, replace it if necessary;
3 after removing the oil gun, unscrew the nozzle and replace it if necessary;
4 in order to replace the electrodes, unscrew the VE fixing screws and remove them: place the new electrodes being careful to
observe the measures showed on pag.: reassemlbe following the reversed procedure.
Caution : adjust the nozzle position according to the air pipe, by means of the VU screw, ance the VL screw is fastened.
Inspect the filter at least once a year.
z
Change the filter, if pressure value between pressure connections 1 and 2 is grea-
ther than 10 mbar.
z
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.
Space requirements for fitting filter, A: from 150 to 230 mm.
Fig. 40
ATTENTION: avoid the electrodes to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler operation
would be compromised. Check the electrodes position after any intervention on the combustion head.
E
V
H
G
V
G
VU
VL
VE