baltur TBML 80 PN Manual Instructions For Use page 62

ADJUSTING AIR ON THE COMBUSTION
HEAD
The combustion head has an adjustment device so that the air
passage between the disk and the combustion head is opened or
closed. You are thus able to obtain, by closing the passage, high
pressure upstream of the disk even at low capacity. The high speed
and turbulence of the air provides for its greater penetration into the
fuel and therefore an excellent mixture and flame stability. High air
pressure upstream of the disk may be necessary to prevent flame
fluctuations, this is particularly essential when the burner works
on the combustion chamber that is pressurized and/or at a high
thermal load.
It is clear from the above that the device that closes the air to the
combustion head must be set at a position such as to always obtain
very high air pressure behind the disk It is advisable to adjust it in
such a way as to obtain a closure of the air at the combustion head
that will require a significant opening of the air shutter that regulates
the aspiration flow from the burner fan. This must of course be the
case when the burner is working at the maximum desired supply.
In practice you have to start the adjustment with the device that
closes the air at the combustion head in an intermediate position,
switching on the burner for approximate adjustment as explained
previously.
When the maximum desired supply has been reached, the
position of the device that closes the air at the combustion head is
corrected, moving it forward and backwards, until the right amount
of air is flowing to the supply with the air damper opened
slightly.
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