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It is important to take account of the fact that the
air output of the fan differs according to whether
the burner has its metal cover fitted or not.
WARNING
Therefore we recommended to proceed as follows:
adjust the air damper as indicated in the Tab. E;
mount the cover, simply by means of the upper screw;
check smoke number;
should it become necessary to modify the air output, remove
the cover by loosening the screw, adjust the air damper,
remount the cover and finally recheck the smoke number.
When the burner works at a firing rate higher than 9 kg/h remove
the panel 1)(Fig. 22) fitted inside the metal cover.
8.7
Electrode setting
The position of the electrodes cannot be regulat-
ed. In case of failure, check that the measure-
ments as shown on the figure are respected.
WARNING
Before removing or assembling the nozzle, loosen the screw
A)(Fig. 23) and move the electrodes ahead.
8.8
Burner start-up cycle
Normal
Thermostat
Motor
Ignition transformer
Valve
Flame
Lock-out lamp
8.9
Adjustments, to avoid flame - detachment, at burner - ignition (only for gas oil)
This inconvenience can occur, when the temperature of the light
oil decreases below +5 °C.
CORRECT POSITIONING OF THE ELECTRODES
Refer to Fig. 23.
PUMP - SETTING
When the temperature of the light oil decreases below +5 °C, in-
crease the pressure to 14 bar.
Start-up, calibration and operation of the burner
~ 12s
D5287
4 ± 0.3 mm
A
D5288
Lock-out due to failure to light
~ 12s
COMBUSTION HEAD ADJUSTMENT
Regulate the combustion head one set-point further ahead than
indicated in the instructions.
Example: the instructions require to set the combustion-head on
set-point 3. Instead, the setting is made on set-point 4.
FAN - AIR DAMPER ADJUSTMENT
Adjust the damper, reducing the excess air until the Bacharach
number is not near 1. (i.e. a combustion with the lowest possible
excess-air).
21
GB
Fig. 22
Move the electrode holder
backwards to the end
4.5 ± 0.5 mm
Fig. 23
D5229
~ 5s
Fig. 24
2903442
1
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