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Technical description of the burner
3
3.8
Burner components
A
A
9
26
10
13
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Maximum gas pressure switch
5 Servomotor controlling the gas butterfly valve and the air
damper valve (by means of an adjustable profile cam mech-
anism).
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.
6 Plug-socket on ionisation probe cable
7 Extensions for slide bars 15)
8 Motor contact maker and thermal relay with reset button
9 Power switch for:
automatic - manual - off
Button for:
power increase - power reduction
10 Terminal board for electrical wiring
11 Cable grommets for electrical wiring (to be carried out by the
installer)
12 Control box with lockout pilot light and lockout reset button
14
15
16
12
11
3
2
1
Seen from A
20
23
4
22
5
6
13 Flame inspection window
14 Air pressure switch
(differential operating type)
15 Slide bars for opening the burner and inspecting the com-
bustion head
16 Gas pressure test point and head fixing screw
17 Air pressure socket
18 Flame sensor probe
19 Air damper
20 Fan air inlet
21 Screws to secure fan to pipe coupling
22 Gas input pipe
23 Gas butterfly valve
24 Boiler fixing flange
25 Flame stability disc
26 Bracket for application of output power regulator RWF
9
GB
18
25
17
24
21
19
D8687
7
8
Fig. 5
20133205
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