Air Regulation On The Combustion Head - baltur BT 250 DSG-4T Manual De Instrucciones

AIR REGULATION ON THE
COMBUSTION HEAD
(See 0002922520)
The combustion head is fi tted with a
regulating device which closes (by
moving forwards) and opens
(by moving backwards) the air
passage between the disk and the
head.
By closing the passage it is possible
to achieve high pressure upstream
the disk for low outputs as well. High
velocity and air turbulence ensure
a better penetration in the fuel, an
optimum mixture and good fl ame
stability. It might be necessary to
have high air pressure upstream
the disk in order to avoid flame
pulsation's and it is considered
practically indispensable when the
burner is operating with a pressurized
furnace and/or high thermal load. It
is 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 always obtain
a decidedly high air pressure value
behind the disk.
It is 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 fl ow 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 required maximum delivery required
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 fl ow suitable for
the delivery, with the air regulation with the air regulation
shutter in suction considerably open. shutter in suction considerably open.
When reducing the air passage on
the combustion head, avoid closing
it completely. Proceed with perfect
centering with respect to the disk.
It must be pointed out that, if perfect
centering with respect to the disk
is not obtained, bad combustion
and excessive heating of the head
could occur which would result in
its rapid deterioration. A control can
be carried out by looking through
the spy hole situated at the back
of the burner; then tighten home
the screws that lock the position
of the air regulation device on the
combustion head.
GENERAL DIAGRAM AIR REGULATIONG
INCORRECT REGULATION
Combustion air inlet with very locked shutter
CORRECT REGULATION
Combustion air inlet with air shutter sensibly open
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Note: Check that ignition occurs
regularly, because when
the device has been moved
forwards, it could occur that
the air velocity in exit is so
high as to render ignition dif-
fi cult. If this happens, move it
backwards, gradually, until it
reaches the correct position
and ignition occurs regularly.
This position should be defi -
nitive.
Combustion head
Disk
- Air fl ow large opening
Combustion head
Disk
Air fl ow quite locked.
Attention:
Avoid complete locking
Control and fi xing knobs
of combustion head
Control and fi xing knobs
of combustion head