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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. 17) 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 +8 °C.
CORRECT POSITIONING OF THE ELECTRODES
Refer to Fig. 17.
PUMP - SETTING
When the temperature of the light oil decreases below +5 °C, in-
crease the pressure to 14 bar.
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 4. Instead, the setting is made on set-point 5.
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).
Start-up, calibration and operation of the burner
~ 12s
4 ± 0.3 mm
A
D5288
Lock-out due to failure to light
~ 12s
19
GB
Move the electrode holder
backwards to the end
4.5 ± 0.5 mm
Fig. 17
D5229
~ 5s
Fig. 18
2903211
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