11
20191053
GB
Technical description of the burner
3.9
Burner description
1
Combustion head
2
Ignition electrode
3
Screw for combustion head adjustment
4
Pipe coupling
5
Servomotor controlling the gas butterfly valve and the air
damper valve (by means of an variable profile cam mechanism).
When the burner is not operating, the air damper is fully
closed in order to reduce to a minimum the heat dispersion
from the boiler due to the flue draught which draws air from
the fan air intake.
6
Fan motor
7
Fan air inlet
8
Flame stability disc
9
Boiler fixing flange
10 Gas butterfly valve
11 Gas input pipe
12 Control box with lockout pilot light and lockout reset button
13 Flame inspection window
14 Screw securing fan to pipe coupling
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 test point
18 Flame sensor probe
19 Air damper
Two types of burner failure may occur:
CONTROL BOX LOCKOUT:
if the control box button 12)(
red led
)(Fig. 5) lights up, it indicates
that the burner is in lockout.
To reset, hold the button down for between 1 and 3 seconds.
MOTOR LOCKOUT:
to release press the button on the thermal relay.
19
11
10 9
8
14
7
6
5
4
3
1 2
12 13
15
16
17
18
Fig. 5
20191097
