Unigas HR2050, Руководство по установке, использованию и обслуживанию

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PART IV: MAINTENANCE
53
Cleaning/replacing the electrodes (direct ignition)
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.
Replacing the ignition electrode
Ignition pilot electrode positions
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.
ATTENTION: avoid the electrode to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler operation
would be compromised. Check the electrode position after any intervention on the combustion head.
ATTENTION: avoid contact between electrodes and
metallic parts (blast tube, head, etc.), otherwise the bur-
ner’s operation would be compromised. Check the elec-
trodes position after any intervention on the combustion
head.
WARNING : The typical pressure to be adjusted at the
pilot gas train pressure stabiliser is approx. 40-50 mbar.
However, the correct value is to be adjusted during the
first burner start-up phase as burner ignition may vary
depending on its operating conditions.
VU
VL
VE
To replace the ignition electrode, proceed as follows:
1
Remove the burner cover
2 Disconnect the electrode (E) cable (CE)
3 Remove the combustion head (see par. “Removing the combustion head”)
4 Loose screw (B) that fasten the ignition electrode (E) to the burner pilot (P)
5 Remove the electrode and replace it, referring to the values quoted on figure
CE
E
B
P