Start-up, calibration and operation of the burner
57
20093868
GB
6.5
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 man-
ual of the generator itself, including the control of the concentration
of CO and CO
2
in the flue gases and of their temperature.
Check in sequence:
–
max output
–
min output
–
ignition output
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: CO
2
8.2 - 9% (for methane).
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. 170);
to reduce the gas delivery and the CO
2
: turn the V1 screw
towards the “-” sign (Fig. 170);.
The
MIN output
should be equal to the value requested by the boil-
er used. To increase or decrease its value use the external modu-
lation 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: CO
2
7.8 - 8.5% (for methane).
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;
to reduce the gas delivery and the CO
2
: turn the V2 screw
towards the “-” sign.
The
IGNITION output
can be found within area A highlighted in the
firing rate (Fig. 5 on page 9). To raise or lower its value, adjust the
parameter P0) using the display (Fig. 33 on page 33).
6.5.1
Optimum calibration values
Tab. P
Key (Fig. 170)
1
Gas valve
2
Quick coupling
3
Compensation pipe (T)
4
Air/gas mixer in the circuit of the suction line
5
Electronic valve connection (XV1)
6
Maximum gas flow adjustment (V1)
7
Downstream pressure test point (P2)
8
Minimum gas flow adjustment (V2)
9
Metallic protective device
10 Upstream pressure test point (P1)
WARNING
Do not change the adjustments of the valve.
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
D9714
Fig. 169
20093839
4
Fig. 170
1
3
3
7
6
2
5
8
9
10
