Unigas HTP2000 Installation Manual page 40

PART IV: MAINTENANCE
Fig. 19 Detailed view of the combustion head with pilot (P) and ignition elecctrode (E)
Observe the values shown on next picture.
.
Replacing the ignition electrode
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.
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.
E
P
5mm
P
Fig. 20
40
E