Biasi M275V.2024 SM, Руководство по обслуживанию

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IGNITION AND DETECTION ELECTRODES
3 Unscrew the nuts "5" (Figure 18.1) and remove the cover of
the combustion chamber.
4 Remove the front insulation panel (see section "18.3 Remov-
al of the front insulation panel" on page 42).
5 Unscrew the screws "7" (Figure 18.4) and remove the burner.
6 Assemble the burner carrying out the removal operation in
reverse order. Ensure the burner is correctly located by lining
up the locating tab (Figure 18.4).
Figure 18 .4
Burner
gasket
Burner
Locating tab
7
Before reassembling ensure the burner gasket is correctly
located .
Warning: After cleaning or replacement as detailed
above, it is deemed necessary to undertake a com-
bustion analysis as detailed in section "11 .3 Adjust-
ment - Chimney Sweep Function" on page 30) .
18 .5 Removal of the rear insulation
See warning note at the end of this chapter before to remove
this part .
Attention: Cover the inner of the condensing heat
exchanger to avoid that dirt and debris fall in the
coil .
1 Do the operations of section "18.4 Removal of the burner" on
page 42 from step 1 to step 3.
2 Remove the insulation "8" by pulling it towards the boiler front
(Hung it with a screwdriver tip) (Figure 18.5).
Figure 18 .5
8
18 .6 Checks
Check of the spark generator.
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
There is not a significant way to verify the integrity of the spark
generator. When the fan turns but the burner does not light a
possible cause is a faulty spark generator on the main PCB. It
would be advisable to replace the Main PCB to rectify the fault.
Check the position of the electrode edges.
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Check for the correct distance between the metallic edge of
the electrode and burner (see Figure 18.6).
Figure 18 .6
4 mm
Check the connection wires