16
Bentone BF1
General
Ι
Π
M
4.1.3 Nozzle assembly adjustment
The burner is fitted with a regulator which changes the brake plate position
in the blast tube. This is used to set the correct pressure drop across the
combustion assembly and thereby achieve good combustion without
pulsation.
The setting to be chosen is dependent among other things on set output
and furnace pressure.
Brake plate setting
• Less diffusion: turn screw to left.
• More diffusion: turn to right.
Setting brake plate position affects air flow. It is therefore always
necessary to adjust the air with the burner air regulator afterwards.
4.1.4 Air intake adjustment
Air settings are very important for achieving good combustion with neither
too much, nor too little, air. Adjustment of combustion airflow is carried out
by turning the air regulator with an Allen key. How far open the air regulator
must be is determined by output, furnace pressure and other burner settings
such as blast tube position.
4.1.5 Method of adjusting air quantity
Setting the air regulator is dependent on how the screw (with which air
regulation is adjusted) is installed. If the air intake is installed underneath
as shown in illustration
Ι
, turning the screw clockwise will reduce airflow,
and anticlockwise increase it. If the air intake is installed on top as shown
in illustration
Π
, clockwise adjustment increases airflow, and anticlockwise
reduces it.
4.1.6 Inlet cone, air adjustment
Airflow is also affected by the position of the inlet cone. However, it is
extremely rare that this needs to be adjusted; it should be left in the
standard STD position to achieve good starts and operations. (A cast-in
arrow on the fan housing indicates the position of the inlet cone. In addition
to the scale on the inlet cone casting, there is also a mark (M) indicating the
factory setting.)
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