Burner Calibration; Burner Start-Up; Adjusting Gas/Air Delivery - Riello RS 28/E Installation, Use And Maintenance Instructions

5.4

Burner calibration

The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet.
Adjust successively:
 Firing output
 Maximum burner output
5.5

Burner start-up

Feed electricity to the burner via the disconnecting switch on the
boiler panel.
Close the thermostats/pressure switches, set the parameters on
the RWF 55 regulator.
Please refer to the specific manual for this operation. Turn the
switch of Fig. 26 to position "ON" and turn the switch of Fig. 26 to
position "LOCAL".
Make sure that the lamps or testers connected to
the solenoids, or indicator lights on the solenoids
themselves, show that no voltage is present. If volt-
age is present, stop the burner immediately and
DANGER
check the electrical wiring. When the burner starts,
check the direction of the motor rotation, as indicat-
ed in Fig. 26.
As the burner is not fitted with a device to check the
sequence of the phases, the motor rotation may be
incorrect. As soon as the burner starts up, go in front
of the cooling fan of the fan motor and check it is ro-
tating anticlockwise.
If this is not the case:
 place the switch of Fig. 26 in position "OFF"
and wait for the control box to carry out the
switch-off phase;
 disconnect the electrical supply from the
burner;
 invert the phases on the three-phase power
supply.
5.5.1

Adjusting gas/air delivery

 Adjust the burner up to the maximum output (gas butterfly
valve completely open);
 adjust the required maximum output with the gas pressure sta-
bilizer;
 set the combustion parameters with the air servomotor and
store the maximum combustion value;
 proceed slowly to the decrease of the output by synchronizing
the combustion with the two servomotors and storing the dif-
ferent setting values.
Start-up, calibration and operation of the burner
23
 Minimum burner output
 Intermediate outputs between low and high fire
 Air pressure switch
 Minimum gas pressure switch
For the start-up procedure and the parameters
calibration, refer to the specific instruction man-
WARNING
ual of the LMV37... electronic cam supplied with
the burner.
OFF ON
LOCAL REMOTE
GB
D12196
Fig. 26
20044359