Ignition, Detection Electrodes And Burner; Function; Removal Of The Ignition And Detection Electrodes; Removal Of The Burner - Biasi Activ A Plus 30C Service Manual

18 iGniTion, dETECTion ELECTRodES
And buRnER

18.1 function

Three electrodes are fitted on the fan-burner group.
Two of them, fitted on the right side of the fan-burner group A, are
the ignition electrodes B.
On the left side is the detection electrode C and it detects the
presence of the flame.
h
C
G
d
figure 18.1
The burner J is fitted on the rear of the fan-burner group A.
J
figure 18.2
iGniTion And dETECTion ELECTRodES
G
b
18.2 Removal of the ignition and detection elec-
trodes
Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent.
1 Remove all the case panels (see section 2).
2 Disconnect the ignition electrodes connector D and the earth
wire E (Figure 18.1) and disconnect the detection electrode
connector F.
3 Unscrew the screws G and remove the ignition electrodes B
and the detection electrode C.
4 Assemble the Ignition and detection electrodes carrying out
A
the removal operation in reverse order.
i

18.3 Removal of the burner

Warning: isolate the boiler from the mains electrici-
E
i ty supply before removing any covering or compo-
nent.
1 Remove the air box and the fan (see section "Removal of the
Air box and the Fan" page 44)
2 Remove the Ignition and detection electrodes (see section
"Removal of the Ignition and detection electrodes" page 45).
i
3 Unscrew the screws H (Figure 18.1) and remove the cover of
the combustion chamber.
4 Unscrew the screws I (Figure 18.1) and remove the Air-gas
duct lid.
5 Remove the burner by sliding it forward.
f
locating tab
figure 18.3
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 18.3).
burner gasket
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