MODULATION OPERATION DESCRIPTION
When the burner is on at minimum flow rate, if the modulation probe
requires it (set to a temperature or pressure value higher than that in
the boiler) the air/gas regulation servomotor starts turning;
•
in a clockwise direction the air flow increases;
•
anticlockwise rotation: the air flow decreases.
Thus gradually increasing gas supply and combustion air until the
maximum supply level set for the burner is reached.
AIR REGULATION ON THE COMBUSTION HEAD
The combustion head is equipped with a regulation device that makes
it possible to open or close the air passage between the disk and
the head. Closing the passage increases the pressure upstream of
the disk also with low flow rates. The high speed and turbulence of
the air provides for its greater penetration into the fuel and therefore
an excellent mixture and flame stability. High air pressure upstream
of the disk may be necessary to prevent flame fluctuations, this is
particularly essential when the burner works on the furnace that is
pressurised and/or at a high thermal load.
The combustion head closing device must be set to a position in
which, behind the disc, there is always a very high air pressure value.
When the burner operates at maximum delivery, adjust the head air
closure, in such a way as to require a considerable air flow damper
opening. Therefore start the regulation with the device that closes
the air on the combustion head in an intermediate position, igniting
the burner for an indicative regulation as explained above. Move
the combustion head forward or backward so as to have an air flow
suitable for the delivery.
CAUTION / WARNINGS
Check that the combustion head is centred with respect to the
disk. An imperfect centring could cause a poor combustion and
overheating of the head with its subsequent rapid deterioration.
BURNER
X
Value indicated by index 4
TBG 35 MC
3 ÷ 31
0 ÷ 6
•
Loosen the screw (1)
•
Turn screw (2) to position the combustion head (3), referring to
index (4)
•
Adjust the distance (x) between the minimum and maximum
according to the indications in the table
CAUTION / WARNINGS
The above adjustments are only indicative; position the
combustion head according to the characteristics of the
furnace.
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0006160096_202206
ENGLISH
Summary of Contents for TBG 35 MC
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