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FUEL HEATING
In order to obtain smooth starting and operation across its output range the burner is fitted with an electric
resistance, which heats up the gas oil in the nozzle line.
This resistance is energized when the thermostat calls for heat and after a delay of approximately two min-
utes depending on room temperature, the motor will start.
The resistance remains inserted and locks-out on the shut-down of the burner.
ATTENTION
Should you want to cut off the electric resistance (on
setting the burner or when the ambient temperature
does not require it, etc...), take the plug off the panel of
the control box and plug it into the "Resistance OFF".
In this case the burner starts up when the thermostats
close.
NOTE
The warning light (LED) is ON but when the resistance
works. It is OFF when the resistance is disconnected or
broken.
ELECTRODES ADJUSTMENT
WARNING
MEASURES MUST BE RESPECTED AND ALSO THE UPWARDS POSITION.
Before removing or assembling the nozzle, loosen the screw (A) and move the electrodes ahead (Fig. 7).
NO ZZLE 2
NO ZZLE 1
4
mm
± 0. 3
CONTROL BOX 531SE
PLUG
Resistance ON
Resistance OFF
A
D8412
9
GB
*
S7059
LED
3- 3.5 mm
Fig. 7
20013744
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