Air Regulation On The Combustion Head - baltur BT 250 DSG 4T Manual Del Usuario

AIR REGULATION ON THE COMBUSTION HEAD

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(See 0002922520)
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The combustion head is fitted with a regulating device
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which closes (by moving forwards) and opens
(by moving backwards) the air passage between the
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disk and the head.
By closing the passage it is possible to achieve high
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pressure upstream the disk for low outputs as well. High
velocity and air turbulence ensure a better penetration in
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the fuel, an optimum mixture and good flame stability. It
might be necessary to have high air pressure upstream
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the disk in order to avoid flame pulsation's and it is
considered practically indispensable when the burner is
operating with a pressurized furnace and/or high thermal
load. It is evident from the above, that the device which
closes 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 closing of the
air on the head; this will necessitate
a considerable opening of the air
shutter which regulates the flow to
the burner's fan suction. Obviously
these adjustments should be carried
out when the burner is operating
at maximum delivery desired. In
practice, start regulating by putting
the device which closes the air on the
combustion head in an intermediate
position, start up the burner and
make trial adjustments as previously
described.
When maximum delivery required
has been reached, proceed with
correcting the position of the
device which closes the air on the
combustion head; move it backwards
or forwards in such a way as to obtain
an air flow suitable for the delivery,
with the air regulation shutter in
suction considerably open. When
reducing the air passage on the
combustion head, avoid closing it
completely. Proceed with perfect
centering 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 hole
situated at the back of the burner;
then tighten home the screws that
lock the position of the air regulation
device on the combustion head.
Note: Check that ignition occurs regularly, because
when the device has been moved forwards, it
could occur that
the air velocity in exit is so high as to render igni-
tion difficult. If this happens, move it backwards,
gradually, until it reaches the correct position and
ignition occurs regularly. This position should be
definitive.
GENERAL DIAGRAM AIR REGULATIONG
INCORRECT REGULATION
- Air flow large opening
Combustion air inlet with very locked shutter
CORRECT REGULATION
Air flow quite locked.
Attention:
Avoid complete locking
Combustion air inlet with air shutter sensibly open
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0006081081_200907
Combustion head
Disk
Control and fixing knobs
of combustion head
Combustion head
Disk
Control and fixing knobs
of combustion head