Air Regulation On The Combustion Head - baltur BT 40 DSN 4T Manual De Instrucciones

AIR REGULATION ON THE
COMBUSTION HEAD
The combustion head is provided with a regulation device that
closes (forward movement) or opens (backward movement) the
air passage between disk and head. By closing the passage, it is
thus possible to obtain a high pressure upstream of the disk also
for low flow rates. The high air speed and turbulence allows a better
penetration of the same into the fuel and therefore, an excellent
mixture and flame stability.
It may be necessary to have a high air pressure upstream of the
disk, so as to prevent flame pulses. This condition is indispensable
when the burner operates on pressurised combustion chamber
and/or with high heating load. From what said above it is evident
that the device closing the air on the combustion head must be set
to such position as to always obtain, behind the disk, a very high
air pressure value. It is recommended to
provide an air closure on the head that
requires a noticeable opening of the air
lock that regulates the burner fan intake
flow. Obviously this condition must occur
when the burner operates at the maximum
required output.
In practice, the regulation must start
with the device that closes the air on
the combustion head in an intermediate
position, igniting the burner for an indicative
regulation as explained above. When
the maximum desired output is reached,
correct the position of the device which
closes air on the combustion head by
moving it forward or backward so that the
air flow is appropriate for the output, with
the air regulation damper noticeably open.
When reducing the air passage on the
combustion head, make sure not to
completely close it. Perfectly center the
combustion head with respect to the disk. A
combustion head not perfectly centered on
the disk could lead to a wrong combustion
and overheat the same head causing its
early wearing.
Check it by looking through the inspection
hole on the burner rear side, and then
fully tighten the screws that lock the air
regulation device on the combustion head.
Check that ignition is correct
!
because if the regulator is shifted
forward, the outgoing air speed may
be too high to permit ignition. Move
backwards, degree by degree, the
regulator until reaching the position
in which the ignition is regular
and accept this new position as
definitive. Remember that for the
first stage, it is better to limit the
amount of air to the amount strictly
necessary to ensure safe ignition even in the most difficult
cases.
AIR REGULATION SCHEMATIC DRAWING
WRONG REGULATION
Combustion head
Combustion air inlet with gate
almost completely closed
CORRECT ADJUSTMENT
Air passageway fairly
closed. Caution: Do
not close completely
Combustion air inlet with gate
almost noticeably open.
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Air passageway
wide open
Combustion head fastening and
control knobs
Combustion head
Combustion head fastening and
control knobs