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0006081053 - ed 2006/12
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 fl ame stability.
It may be necessary to have high air
pressure before the disk to prevent
fl ame fl uctuations, 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
signifi cant opening of the air damper
that regulates the aspiration fl ow from
the burner fan. This must of course be
the case when the burner is working at
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,
N.B. The above adjustments are indicative only; position the combustion head according to
the characteristics of the combustion chamber
COMBUSTION HEAD
AIR ADJUSTMENT
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
TBL 85P
100 ÷ 64
1 ÷ 5
TBL 105P
103 ÷ 67
1 ÷ 5
TBL 130P
103 ÷ 67
1 ÷ 5
TBL 160P
127,5 ÷ 91,5
1 ÷ 5
COMBUSTION HEAD ADJUSTMENT SCHEME
moving it forward and backwards,
until the right amount of air is fl owing
to the supply, with the air damper in
signifi cantly open.
