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4.10
Burner description
1
Combustion head
2
Ignition electrode
3
Screw for combustion head adjustment
4
Maximum gas pressure switch
5
Pipe coupling with flange for boiler fixing
6
Servomotor controlling the gas butterfly valve and the air
damper, by means of a variable profile cam mechanism.
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
7
Plug-socket on ionisation probe cable
8
Extensions for slide bars 16)
9
Motor contact maker and thermal relay with reset button
10 A switch for:
automatic-manual-off operation
A button for:
output increase - decrease
11 Terminal board
12 Cable grommets for electrical wiring (to be carried out by the
installer)
13 Electrical control box with lockout pilot light and reset button
14 Flame inspection window
15 Minimum air pressure switch (differential type)
16 Slide bars for opening the burner and inspecting the
combustion head
17 Gas pressure test point and head fixing screw
18 Air pressure test point
19 Flame sensor probe
20 Air damper
21 Air inlet to fan
22 Screws to secure fan to pipe coupling
23 Gas input pipe
24 Gas butterfly valve
Technical description of the burner
13
GB
20155987
25 Flame stability disc
26 Sockets for electric connections
27 Lifting rings
Fig. 5
20152093
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