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13
20098687
GB
Technical description of the burner
4.10
Burner description
1
Combustion head
2
Ignition electrode
3
Screw for combustion head adjustment
4
Pipe coupling
5
Minimum air pressure switch (differential type)
6
Flame sensor probe
7
Air pressure test point
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 com-
bustion head
11 Servomotor controlling the gas butterfly valve and the air
damper valve (by means of an variable profile cam mecha-
nism).
When the burner is not operating the air damper 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 Control box with lockout pilot light and lockout reset button
20 Power switch for:
automatic - manual - off
Button for:
power increase - power reduction
21 Plugs for electrical wiring
22 Air damper
23 Plug-socket on ionisation probe cable
Control box lockout:
➤
if the control box 19)(Fig. 6) push-button lights up, it indi-
cates that the burner is in lockout. To reset, press the button.
Fig. 6
D2208
D2193
D1074
Summary of Contents for 3897304
Page 2: ...Translation of the original instructions ...
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