Verification Of Ignition And Ionisation Electrodes - Hamworthy VARMAX 120 Installation, Commissioning And Servicing Instructions

VARMAX - Installation, Use and Maintenance
INFORMATION:
Models 120 to 320:
Models 390 To 600
figure 36 - Filter matting

7.4. Verification of ignition and ionisation electrodes

Ignition
electrode
figure 37 - Position of electrodes
figure 38 - Spacing
50 / 156
The air filter is an important element of the boiler. It limits the burner
and the exchangers becoming sooty. Changing it regularly (at
least every year) makes burner and exchanger cleaning operations
considerably easier.
U0038318-B
mountings
U0024791-B
Ionisation
electrode
U0502214-#
2,5-3,5 mm
U0502273-#
- Remove the used filter matting (no tool required).
- Be careful not to let any dust or other foreign
bodies enter the air duct (see opposite).
- Insert the new rectangular filter matting between
the filter's protective grille and the mountings
(see opposite).
Ensure that the link between both ends of the
matting is under one of the mountings.
- For models 390 to 600, insert the square filter
cloth on the back gate of the filter.
Electrode removal
Unscrew the two M4 Torx screws holding the
electrode that needs to be removed.
If necessary and if there is a large amount of
oxidation, clean the electrodes by rubbing them
with an emery cloth.
Check the space between the ignition electrode
and the ground electrode (see diagram opposite).
It must be between 2.5 and 3.5 mm. If this is not
the case, replace the electrode.
00BNO9168-I (U0606551)