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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 temper-
ature does not require it, etc. . .), take the plug off
the panel of the control box and plug it into the "Re-
sistance OFF". In this case the burner starts up
when the thermostats close.
NOTE
The warning light (LED) is ON but when the resist-
ance works It is OFF when the resistance is discon-
nected or broken.
ELECTRODES ADJUSTMENT
Attention:
Before assembling or removing
the nozzle, loosen the screw (A)
and move the electrodes ahead.
2666
CONTROL BOX 531SE
PLUG
Resistance ON
Resistance OFF
4 ±
0.3 mm
D5230
A
7
GB
*
S7059
LED
IMPORTANT:
THESE DIMENSIONS
MUST BE OBSERVED
2 – 2.5
mm
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