Unigas HRX2060, Manual Of Installation - Use - Maintenance

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PART IV: MAINTENANCE
44
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.
Adjusting the ignition electrode
Replacing the ignition electrode
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 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.
_
A B C D
HRX2050 MG 3÷4 ~14 8 5
HRX2080 MG 3÷4 ~14 8 5
HRX3050 MG 3÷4 ~14 8 5
D
B
C
A
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
Ignition pilot electrodes positions (for light oil operation)
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), otherwise the boi-
ler’s operation would be compromised. Check the electrodes position after any intervention on the combustion head.