Air Regulation On The Combustion Head - baltur BT 40 DSG Manual De Usuario

AIR REGULATION ON THE COMBUSTION HEAD

The combustion head is fitted with a regulation device which closes (move forward) the air flow between the disk and
the head. Thus by closing the passage, a high pressure is obtained upstream the disk also with low flow rates. The
high velocity and turbulence of the air ensures better penetration in the fuel, hence an optimal mixture and flame
stability. It might be necessary to have a high air pressure upstream the disk to avoid flame pulsation; this condition
becomes practically essential when the burner works either with an over pressure furnace or a high thermal load.
From the above it is evident that the device which closes the air on the combustion head should be set in such a
position so as to obtain always high air pressure behind the disk.
Close air passage on the burner head so as to require a considerable opening of the air shutter which controls the
suction flow of the burner fan; obviously this condition should exist when the burner is working at maximum desired
output. As a rule adjustment should be started with the device which closes the air flow on the combustion head set
in an intermediate position, and starting up the burner for a trial adjustment as previously stated.
When the maximum desired burner output is achieved, re-set the device which closes flow air on the combustion
head either in a forward or backward position so as to obtain an air flow suitable for delivery rate, with the suction air
shutter considerably open. When reducing the air passage on the combustion head, do not close it completely.
Line it accurately in respect to the disk. Remember that if an accurate alignment is not made in respect to the disk a
bad combustion and excessive head heating will result with consequent rapid deterioration.
Check it through the window in the back of the burner and then tighten up the screws which block the air control
device in position on the combustion head.
Remarks: Make sure that start-up takes place
normally, because if the air control device
has moved forward, it may happen that
the air out-flow velocity is so high that
starting up proves difficult. In this case,
move the air control device gradually
backward until it reaches a position
where starting up takes place normally;
this position should be final.
It is better to keep the amount of air for the 1st
flame to the bare minimum if a fail-safe ignition
is to be achieved also under the most critical
conditions.
SETTING THE DISTANCE BETWEEN THE DISK AND THE NOZZLE
Burners are fitted with a device which permits to change the distance between the disk and the nozzle.
The distance between the disk and the nozzle is set in the factory, and it should be reduced only if the atomized fuel
cone coming out of the nozzle wets the disk and fouls it up.
(see BT 8608/1)
INCORRECT REGULATION
Combustion head
Combustion air inlet with
very locked shutter
CORRECT REGULA TION
Air flow quite locked.
ATTENTION: Avoid
complete locking.
Combustion air inlet with
very opened shutter
Air flow large
opening
Control and fixing knobs of
combustion head
Combustion head
Control and fixing knobs of
combustion head
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