Table of Contents
Advertisement
5.3
Burner start-up
Feed electricity to the burner via the disconnecting switch on the
boiler panel.
Close
the
thermostats/pressure
switch 4)(Fig. 8 on page 13) to position "(1) - ON".
Check that the lamps or testers connected to the
solenoid valves, or the pilot lights on the solenoid
valves, indicate that no voltage is present.
DANGER
If they indicate the presence of voltage, stop the
burner immediately and check the electric
connections.
As the burner is not fitted with a device to check the sequence of
the phases, the rotation of the motor may be incorrect.
As soon as the burner starts place yourself in front of the cooling
fan of the fan motor and check that it turns anticlockwise. See
Fig. 33.
If this is not the case:
–
set the switch 4)(Fig. 8 on page 13) to "(0) - OFF" and wait
until the flame control carries out the switching off phase;
–
disconnect the burner form the power supply;
–
invert the phases on the three-phase power supply.
5.4
Air / fuel adjustment
Air/fuel synchronisation is carried out with the relevant air and
gas servomotors by logging a calibration curve by using the flame
control.
It is advisable, to reduce the loss and for a wide calibration field,
to adjust the servomotors to the maximum of the output used, the
nearest possible to the maximum opening (90°).
The choking of the air, taking into account the maximum combus-
tion output, takes place by varying the adjustment of the combus-
tion head (see "Combustion head adjustment" on page 24).
On the gas butterfly valve, the fuel step according to the burner
output required, with servomotor completely open, is carried out
by the pressure stabiliser on the gas train.
5.4.1
Air adjustment for maximum output
Adjust the servomotor to maximum opening (nearly 90°) so
that the air butterfly valves are entirely open.
5.4.2
Air/fuel adjustment and output modulation
system
The air/gas regulator and output modulation system equipping
RS/E series burners performs a number of integrated functions to
optimise burner function, in both individual installations and in
combination with other units (e.g. double furnace boiler or multi-
ple heat generators in parallel).
The basic system functions control:
1
The dosage of the air and fuel through positioning using
direct servocommands of the relevant valves eliminating the
possible play in the calibration systems with mechanical
cam lever mechanisms, used on traditional modulating
burners.
2
The modulation of the burner output in accordance with the
load required by the system, with maintenance of the pres-
sure or temperature of the boiler at the operating values set.
3
The sequence (cascade adjustment) of more than one
boiler through the suitable connection of the various units
and the activation of the internal software of the individual
systems (option).
Start-up, calibration and operation of the burner
switches
and
turn
the
0
1
Further interfaces and communication functions with computers,
for remote control or integration in central supervision systems
are available on the basis of the configuration of the system.
The first start up and every further internal setting
operation of the adjustment system or the expan-
sion of the base functions require access by
means of password and are to be carried out by
WARNING
service personnel who are especially trained for
the internal programming of the instrument and
the specific application created with this burner.
5.4.3
Burner adjustment
The optimum adjustment of the burner requires an analysis of
flue gases at the boiler outlet.
Adjust in sequence:
1 - Output upon ignition
2 - MAX output
3 - MIN output
4 - Intermediate outputs between Min. and Max.
5 - Air pressure switch
6 - Maximum gas pressure switch
7 - Minimum gas pressure switch
33
GB
20172251
Fig. 33
20205255
Advertisement
Table of Contents
