baltur BTG 11P, Instruction

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21
The combustion head is equipped with a regulating device which closes and opens the air passage between the
disk and the head. By closing the passage it’s possible to achieve high pressure upstream the disk for low inputs
as well. High velocity and turbulence ensure a better penetration in the fuel, an optimum mixture and good flame
stability. It might be necessary to have high air pressure upstream the disk in order to avoid flame pulsation and it’s
considered practically indispensable when the burner is operating with a pressurised furnace and/or thermal load.
It’s 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’s 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 desired 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 to the delivery, with the air regulation shutter in suction considerably open.
When reducing the air passage on the combustion head, avoid closing it completely.
N.B. Check that ignition occurs regularly, because if the passage between the disk and the head is closed, it could
occur that the air velocity is so high as to render ignition difficult. If this happens, gradually open the regulator
until it reaches the correct position and ignition occurs regularly. This position should be definitive. It should
alsobe remembered that, for the 1
st flame, it is preferable to limit the quantity of air to that which is strictly
indispensable in order to have safe ignition even in the most difficult circumstances.
AIR REGULATION ON THE COMBUSTION HEAD
(see 9485/2-0002933470)
AIR REGULATION AND ELECTRODES-DISK POSITIONING
PRINCIPLE DIAGRAM BTG 3,6P - 6P
N° 0002933471
REV. 19/09/02
1 - regulating screw disk-head
(screw in order to open the air passage between the disk end the head unscrew to close)
2 - Disk: attantion: avoid closing it completely
3 - Combustion head
4 - Reference position disk-head
6 - Air regulation servomotor
7 - Ionizing electrode
8 - Ignition electrode
0002933471.tif
1 Max ignition electrode projection
56 Ionizing electrode projection