20138630
32
GB
Start-up, calibration and operation of the burner
6.6
Burner adjustment
The optimum adjustment of the burner requires an analysis of
flue gases at the generator outlet.
The burner application at the generator, the adjustment and the
testing must be carried out in compliance with the instruction
manual of the generator itself, including the control of the concen-
tration of CO and CO
2
in the flue gases and of their temperature.
Check in sequence:
–
max output
–
min output
–
Output upon ignition
The
MAX output
should be equal to the value requested by the
boiler used. To increase or decrease its value use the external
modulation control.
Measure the gas delivery on the counter to precisely establish the
burnt output.
Using a smoke analyser, measure the value of the CO
2
or the O
2
in order to optimise the burner calibration.
The correct values are shown in Tab. R.
To correct these values act on the gas valve in the following way:
to increase the gas delivery and the CO
2
: turn the V1 screw
towards the “+” sign (Fig. 25);
to reduce the gas delivery and the CO
2
: turn the V1 screw
towards the “-” sign (Fig. 25);.
The
MIN output
should be equal to the value requested by the
boiler used. To increase or decrease its value use the external
modulation control.
Measure the gas delivery on the counter to precisely establish the
burnt output (to be corrected in relation to the pressure of the
gas).
Using a smoke analyser, measure the value of the CO
2
or the O
2
in order to optimise the burner calibration.
The correct values are shown in Tab. R.
To correct these values act on the gas valve in the following way:
to increase the gas delivery and the CO
2
: turn the V2 screw
towards the “+” sign (Fig. 25);
to reduce the gas delivery and the CO
2
: turn the V2 screw
towards the “-” sign (Fig. 25);.
The
IGNITION output
can be obtained in area A highlighted in
the charts on page 12. To raise or lower its value, adjust the pa-
rameter P0) using the control panel of the control box (Fig. 8 on
page 15).
6.6.1
Optimum calibration values
Tab. R
WARNING
Do not modify the adjustments of the gas
valve for the ignition output!
MIN output
MAX output
CO
2
(%)
O
2
(%)
CO
2
(%)
O
2
(%)
Methane
8
6.6
8.5
5.7
LPG
9.5
6.4
10
5.6
G25
7.8
6.8
8.3
5.8
D9714
Fig. 24
20146400
Fig. 25
Adjustment of maximum gas flow (V1)
Minimum gas flow
adjustment on the stabiliser (V2)
