Riello C9541400, Installation, Use And Maintenance Instructions

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Start-up, calibration and operation of the burner

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



Minimum burner output



Intermediate outputs between low and high fire



Air pressure switch



Minimum gas pressure switch

5.5

Burner start-up

Supply electricity to the burner via the disconnecting switch on
the boiler panel.

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.

Close the thermostats/pressure switches, set the parameters on
the RWF 40 regulator. Please refer to the specific manual for this
operation.

Turn the switch to position “ON” (Fig. 29) and the switch of to posi-
tion “LOCAL”.

5.6

Air pressure switch 

The air pressure switch is connected in differential (Fig. 30) and is
activated by both the negative pressure of the air intake and the air
pressure from the fan.
Adjust the air pressure switch (Fig. 27) after having performed all
other burner adjustments with the air pressure switch set to the
min. of the scale.
With the burner operating at low fire, adjust the pressure switch by
slowly turning the relative knob clockwise until the burner locks out.
Then turn the knob counter-clockwise about 20% of the set point
and start-up the burner again to ensure the set point is correct.
If the burner locks out again, turn the knob counter-clockwise a little
bit more.

DANGER

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

check the electrical wiring.

WARNING

For the start-up procedure and the parame-
ters calibration, refer to the specific instruc-
tion manual of the LMV37... electronic cam
supplied with the burner.

REMOTE

LOCAL

OFF

ON

Fig. 29

D10439

Fig. 30

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