Combustion Adjustment - baltur BTG 15 Manuel D'instructions

AIR REGULATION ON COMBUSTION HEAD
The combustion head is equipped with an adjustment device,
allowing the air passage between disk and head to be opened or
closed. By closing the passage, it is thus possible to obtain a high
pressure upstream of the disk also for low flow rates. High velocity
and turbulence ensure a better penetration in the fuel, an optimum
mixture and good 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 furnace that is
pressurised and/or at a high thermal 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 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 gate that regulates the suction
flow from the burner fan. This must of course be the case when the
burner is working at the required maximum supply. 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 as described 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 adjustment gate noticeably open.
To facilitate the combustion head regulation, see tables
(n° 0002935000 for BTG 15, 0002934171 for BTG 20 and
0002935180 for BTG 28).
When reducing the air passage on the combustion head, avoid
closing it completely, since it may cause an excessive heating of
the head with a consequent quick deterioration.
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 ADJUSTMENT

A AIR GATE OPENING ADJUSTER
- Reference index in position "0" gate closed
- Reference index in position "6" gate open
B AIR GATE OPENING ADJUSTER REFERENCE INDEX
C AIR REGULATION LOCK SCREW
D FLAME DISC ADJUSTMENT SCREW
E FLAME DISC POSITION INDEX
(0 = MIN 4 = MAX for BTG 15)
(0 = MIN 3 = MAX for BTG 20)
(0 = MIN 4 = MAX for BTG 28)
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