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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
minutes 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 tem-
perature does not require it, etc. . .), take the
plug off the panel of the control box and plug it in-
to the "Resistance OFF".
In this case the burner starts up when the ther-
mostats close.
NOTE
The warning light (LED) is ON but when the re-
sistance works
It is OFF when the resistance is disconnected or
broken.
ELECTRODE SETTING
Attention:
Before assembling or removing
the nozzle, loosen the screw (A)
and move the electrodes ahead
1541
CONTROL BOX 531SE
PLUG
Resistance ON
Resistance OFF
4 ±
0.3 mm
D5230
A
8
GB
*
S7059
LED
IMPORTANT:
THESE DIMENSIONS
MUST BE OBSERVED
2 – 2.5
mm
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