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Technical description of the burner
3
3.8
Burner components
A
A
10
19
25
18
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Maximum gas pressure switch
5 Air pressure switch
(differential operating type)
6 Flame sensor probe
7 Air pressure socket
8 Gas pressure test point and head fixing
screw
9 Screw securing fan to pipe coupling
10 Slide bars for opening the burner and
inspecting the combustion head
11 Servomotor controlling the gas but-
terfly valve and the air damper valve
(by means of an adjustable profile
3.9
Burner equipment
The burner is supplied complete with:
Gas train flange
Flange gasket
4 screws to fix the M8x25 flange:
4 screws to fix the M8x25 burner flange to the boiler
6463
5
9
8
3
11
24
Seen from A
cam mechanism).
When the burner is not operating the
air gate valve is fully closed in order
to reduce heat dispersion from the
boiler due to the flue draught which
draws air from the fan suction inlet.
12 Plate with four hole knock-outs for
electrical cable routing
13 Fan air inlet
14 Gas input pipe
15 Gas butterfly valve
16 Boiler fixing flange
17 Flame stability disc
18 Flame inspection window
19 Power switch for: automatic - manual
- off
2
1
6
17
7
16
13
23
12
15
4
14
21
D8705
Thermal insulation screen
N° 6 cable grommets for electrical wiring
Instruction manual
Spare parts list
8
GB
26
20
22
Button for: power increase - power
reduction
20 Motor contact maker and thermal re-
lay with reset button
21 Control box with lockout pilot light
and lockout reset button
22 Terminal board for electrical wiring
23 Air damper
24 Tube connecting the fan suction line
to the air pressure switch
25 Bracket for application of output pow-
er regulator RWF
26 Plug-socket on ionisation probe ca-
ble
Fig. 5
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