Air Regulation On The Combustion Head - baltur BT 250 DSG 4T Bedienungsanleitung

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 disc and head.
The passage closure increases the pressure upstream of the disc
also for low flow rates. The high speed and turbulence of the air
provides for its greater penetration into the fuel and therefore an
excellent mixture and flame stability. It can be indispensable to have
high air pressure upstream of the disc to prevent flame pulsations.
This condition is practically indispensable when the burner works
with a furnace that is pressurized and/or has a high heat load.
In practice, start by adjusting the device that closes the air on the
combustion head to an intermediate position, turning on the burner
for a preliminary adjustment.
When the maximum required supply is reached, correct the position
of the device closing the air on the combustion head by moving
DIAGRAM ILLUSTRATING PRINCIPLE OF AIR CONTROL
WRONG ADJUSTMENT
Combustion air inlet with gate
almost completely closed
CORRECT ADJUSTMENT
it forwards or backwards so as to have a suitable air flow for the
delivery, with suction air adjustment shutter sensibly 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 disc. A combustion head not perfectly centered to the
disc 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. If this happens, gradually move the regulator back to
a position in which ignition takes place correctly, and accept
this as the final position.
Combustion head
Disc
Air passageway
wide open
Combustion head
Disc
Air passageway fairly
closed.
Attention: Do not
close completely
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Combustion head fastening and control
knobs
Combustion head fastening and control
knobs