Start-up, calibration and operation of the burner
41
20036644
GB
5.6.1
Combustion air adjustment
Fuel/combustion air must be synchronized with the relevant servo-
motors (air and gas) by storing a setting curve by means of the
electronic cam.
To reduce pressure loss and to have a wider adjustment range, it
is best to set the servomotor to the maximum output used, as near
to maximum opening (90°) as possible.
On the gas butterfly valve, the fuel’s partial setting adjustment
based on required output, with the servomotor fully open, is made
by using the pressure stabilizer on the gas train.
5.6.2
Air adjustment for maximum output
Set the servomotor to maximum opening (near 90°) so that the air
butterfly valves are fully open.
Not for RLS 800/E model
Loosen screw 2)(Fig. 45) under the burner’s intake and close
grille 1) progressively until you achieve the required output.
The only time reducing intake to a partial setting is not necessary
is when the burner is working at the top of the operating range giv-
en in Fig. 21.
5.6.3
Adjusting gas/air delivery
Move slowly towards the maximum output (butterfly gas valve
completely open);
adjust the required maximum output with the gas pressure sta-
bilizer;
adjust the combustion parameters with the air servomotor and
store the maximum combustion point;
complete the procedure slowly, synchronizing the combustion
with the two servomotors and storing the different setting
points.
5.6.4
Adjusting oil/air delivery
Switch to the light oil operation.
During the ignition, move slowly with an approximate adjust-
ment to the oil servomotor at maximum 90°.
Adjust the combustion parameter with the air servomotor and
store the maximum combustion point.
Complete the procedure slowly, synchronizing the combustion
with the two servomotors.
Store the different setting points.
5.6.5
Air/fuel control and power modulation system
The air/fuel and power modulation system installed on
RLS
burner series provides, a set of integrated functions ensuring top
level energy and operational performance from the burner, both
for single and grouped burners (e.g. boiler with a double com-
bustion chamber or several generators in parallel).
The system includes the following basic functions:
air and fuels are supplied in correct quantities by positioning
the valves by direct servo-control, thus avoiding the possibility
of play typical of systems used for traditional modulating burn-
ers, in which settings are obtained by levers and a mechani-
cal cam;
burner power is modulated according to the load required by
the system, while boiler pressure or temperature is main-
tained at set operating values;
Further interfaces and computer communication functions for
remote control or integration in centrally supervised systems are
available according to the system’s configuration.
NOTE
The first start-up and all further operations concerning internal
settings of the control system or expansion of basic functions,
are accessed with a password and are reserved for technical
service personnel specifically trained for internal programming
of the instrument and for the specific application obtained with
this burner.
The first start-up and curve synchronization manual is supplied
with the burner.
The complete manual for checking and setting all parameters
will be provided on application.
WARNING
We recommend you achieve the maximum output
required manually, and adjust intake to the partial
setting, define gas pressure and adjust the com-
bustion head before completing the setting and
storing the fuel/combustion air synchronization
curves.
Fig. 45
D3094
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