Combustion Head And Flame Disk - baltur BT 75 DSPN Manual De Instrucciones

REGULATION OF THE COMBUSTION HEAD AND
E
FLAME DISK
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The burner is equipped with a combustion head which can be
regulated (by moving it backwards or forwards) in such a way as
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to close more or open more the air passage between the disk and
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the head. By throttling the passage, it is possible to achieve high
pressure upstream the disk, and therefore high velocity and air
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turbulence for low inputs as well. High velocity and air turbulence
ensure better penetration in the fuel and are therefore an optimum
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mixture and allow the burner to operate with good flame stability.
High air pressure, upstream the disk, might be necessary in order
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to avoid flame pulsations, and it is considered practically indispen-
sable when the burner is operating with a pressurized furnace and/
or high thermal load.
It is evident from above, that the position of the device which
regulates the air on the combustion head should be put in such a
position as to always obtain a decidedly high air pressure value
behind the disk. It is advisable to regulate in such a way as to
achieve a throttling of the air between the disk and the head; this
will necessitate a considerable opening of the air shutter which
regulates the flow to the burner's fan suction.
GENERAL DIAGRAM AIR REGULATION
INCORRECT REGULATION
Combustion head
Flame disk
Air flow large
opening
Combustion air inlet with very
locked shutter
CORRECT REGULATION
Combustion head
Air flow quite
locked.
ATTENTION:
Avoid complete
locking.
Combustion air inlet with very
opened shutter
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Obviously these adjustments should be carried out when the burner
is operating at maximum delivery desired. In practice, commence
regulating with the combustion head in an intermediate position,
start up the burner and make a first adjustment as previously
described.
When maximum delivery desired has been reached, proceed with
correcting the position of the combustion head; move it backwards
and forwards in such a way as to obtain an air flow suitable for
the fuel delivery with the air regulation in suction considerably
open. If the combustion head is pushed forwards (which causes a
reduction in the air passage between the head and the disk), avoid
closing it completely.
When regulating the combustion head, proceed with centering it
perfectly with respect to the disk.
It must be pointed out that, if perfect centering with respect to the
disk is not obtained, bad combustion and excessive heating of
the head could occur which would result in its rapid deterioration.
A control can be carried out by looking through the spy holes
situated on the back of the burner; then tighten home the screws
that lock the combustion head in position. The distance between
the disk and the nozzle, regulated by the manufacturer, must be
reduced only if the atomized fuel cone coming out of the nozzle
wets the disk and fouls it up.
Control and fixing knobs
of combustion head
Control and fixing knobs
of combustion head
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