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000608042_200705
COMBUSTION HEAD AIR
ADJUSTMENT
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,
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. It may be necessary
to have high air pressure before the
disk to prevent flame fluctuations,
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
blast-pipe must be set at a position
such as to always obtain very
high air pressure behind the disk.
It is advisable to adjust 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 damper that regulates
the aspiration flow from the burner
fan. This must of course be the
case when the burner is working at
maximum desired supply.
N.B. The above adjustments are indicative only; position the combustion head according to
the characteristics of the combustion chamber
X= Distance between combustion head and disk; adjust the distance X following the indications below:
a) slacken screw 1
b) turn screw 2 to position the combustion head 3, referring to index 4.
c) adjust the distance X between minimum and maximum according the indications in the table.
BURNER
X
Value indicated by index 4
TBG 55PN
4 ÷ 28
1 ÷ 3,7
TBG 85PN
5÷ 36
1 ÷ 4,5
TBG 120PN
17÷ 54
1 ÷ 5
TBG 150PN
17÷ 36
1 ÷ 3,2
TBG 210PN
14÷ 51
1 ÷ 5
COMBUSTION HEAD ADJUSTMENT SCHEME
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 in significantly open.
