Biasi ADVANCE 15OV, Service Manual

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IGNITION AND DETECTION ELECTRODES

11  IGNITION, DETECTION ELECTRODES 

AND BURNER

11 .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.

Figure 11 .1

A 

B 

C 

D 

E 

F 

G 

H 

I 

I

G

H

The burner "J" is fitted on the rear of the fan-burner group "A".

Figure 11 .2

J 

11 .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 4).

2  Disconnect the ignition electrodes connector "D" and the 

earth wire "E" (Figure 11.1) 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 

the removal operation in reverse order.

Warning: A new sealing gasket must be used during 

refitting  of  the  electrodes  on  all  occasions  of  re

-

moval .

11 .3  Removal of the air-gas duct gasket

See warning note at the end of this chapter before to remove 

this part .

1  Unscrew the screws "I" (Figure 11.1 - Figure 11.3) and re-

move the Air-gas duct lid.

2  Assemble the new front insulation carrying out the removal 

operation in reverse order. When fitting the new panel ensure 

that the electrodes holes coincide with the holes of the com-

bustion chamber.

Figure 11 .3

Air---gas

duct gasket

I

Caution:

After any periodical servicing or disturbance the combustion 

chamber silicon seal (Figure 11.4) and the Air-gas duct gasket 

(Figure 11.3) must be fully inspected and replaced at the discre-

tion of the service engineer.

After any disturbance to the chamber door seal the appiance 

must undergo a full analytical combustion performance check.

11 .4  Removal of the front insulation panel

See warning note at the end of this chapter before to remove 

this part .

1  Remove the Ignition and detection electrodes (see section 

"11.2 Removal of the Ignition and detection electrodes" on