Air Regulation On The Combustion Head - baltur BTG 11 Bedienungsanleitung

the thermostats).
• Control the efficiency of the safety devices: the "shut
down" (by detaching the ionisation electrode cable), the
air pressure switch, the gas pressure switch, the gas pressure
switch and the thermostats).
The pressure switch is self-controlled and trefore it must close
the contact, which is foreseen to be closed at rest, (fan stops
and consequently there is an absence of air pressure in the
burner); if it does not, the control box will not be inserted (the
burner remains at as standstill). It must be specified that if the
contact is not closed during working, the control box will carry
out its cycle, but the ignition transformer will not be inserted
and the gas valves will not open.
Consequently, the burner will go to shut down. Check that the air
pressure switch functions properly with burner operating at 1
only, increase the regulating value until it reaches intervention point
and the burner should go to shut down. To ublock the burner, press
the special pushbutton and return the pressure switch regulator to a
sufficient value in order to measure the air pressure existing during
the pre-ventilation phase.
AIR REGULATION ON THE
COMBUSTION HEAD
The combustion head is equipped with a regulating device which
closes and opens the air passage between the disk and the head.
By closing the passage it's possible to achieve high pressure
upstream the disk for low inputs as well. High velocity and turbulence
aIr regULatIon anD eLeCtroDeS-DISK poSItIonIng prInCIpLe DIagram Btg 3,6 - 6
1 regulating screw disk-head (screw in order to open the air
passage between the disk end the head unscrew to close)
2 Disk: attantion: avoid closing it completely
3 Combustion head
4 Reference position disk-head
ensure a better penetration in the fuel, an optimum mixture
and good flame stability. It might be necessary to have high air
pressure upstream the disk in order to avoid flame pulsation and it's
considered practically indispensable when the burner is operating
with a pressurised furnace and/or thermal load. It's 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 obtain a decidedly
high air pressure value behind the disk. It's 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 flow 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 desired has
been reached, proceed with correcting the position of the device
flame
st
which closes the air on the combustion head; move it backwards
or forwards in such a way as to obtain an air flow suitable to the
delivery, with the air regulation shutter in suction considerably open.
When reducing the air passage on the combustion head, avoid
closing it completely.
Check that ignition occurs regularly, because if the passage
between the disk and the head is closed, it could occur that
the air velocity is so high as to render ignition difficult. If this
happens, gradually open the regulator until it reaches the
correct position and ignition occurs regularly. This position
should be definitive. It should alsobe remembered that, for
the 1 flame, it is preferable to limit the quantity of air to that
st
which is strictly indispensable in order to have safe ignition
even in the most difficult circumstances.
1 Max ignition electrode projection
56 Ionizing electrode projection
5 Air regulation manual system
6 Air regulation servomotor only for BTG 3.6P - 6P
7 Ionizing electrode
8 Ignition electrode
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