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Technical description of the burner
5.7 Burner description
1 Ignition electrodes
2 Combustion head
3 Screw for combustion head adjustment
4 Screw for fixing fan to flange
5 Oil pressure switch
6 Pressure gauge for pressure on nozzle return
7Pump
8 Nozzle holder
9 Air gate valve
10 Fan pressure test point
11 Boiler mounting flange
12 Flame stability disk
13 Servomotor, provides adjustment of fuel delivery regulator
and of air gate valve.
When the burner is not operating the air gate valve is fully
closed in order to reduce to a minimum heat dispersion from
the boiler due to the flue draught which draws air from the
fan suction inlet.
14 Slide bars for opening the burner and inspecting the com-
bustion head
15 Electrical motor
16 Extensions for slide bars 14)
17 Control box
18 Flame inspection window
19 Valve assembly with pressure regulator on nozzle return
Two types of burner failure may occur:
Control Box Lock-out: if the control box 17) push-button lights up,
it indicates that the burner is in lock-out.
To reset, press the push-button of the thermal relay 3)(Fig. 5 on
page 11).
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