Ignition, Detection Electrodes And Burner; Function; Removal Of The Ignition And Detection Electrodes; Removal Of The Burner - Biasi Advance Plus 25C ERP 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.
F
C
G
Figure 18 .1
H
Figure 18 .2
The burner "J" is fitted on the rear of the fan-burner group "A".
J
Figure 18 .3
- 42 -
IGNITION AND DETECTION ELECTRODES
A
G
B
E
D
E
I
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 General access
and emptying hydraulic circuits" on page 5).
2 Disconnect the ignition electrodes connector "H" (Figure
18.2) and the earth wire "D" (Figure 18.1) and disconnect the
detection electrode connector "I" (Figure 18.2).
3 Unscrew the screws "E" and remove the ignition electrodes
"B" and the detection electrode "C".
4 Assemble the Ignition and detection electrodes carrying out
the removal operation in reverse order.
Warning: A new sealing gasket must be used during
F
refitting of the electrodes on all occasions of re-
moval .

18 .3 Removal of the burner

Warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove the air box and the fan (see section "17.2 Removal
of the Air box and the Fan" on page 41).
2 Remove the Ignition and detection electrodes (see section
G
"18.2 Removal of the Ignition and detection electrodes" on
page 42).
3 Unscrew the screws "F" (Figure 18.1) and remove the cover
of the combustion chamber.
4 Unscrew the screws "G" (Figure 18.1) and remove the Air-
gas duct lid.
5 Remove the burner by sliding it forward.
Figure 18 .4
Burner gasket
Locating tab