49
20079424
GB
Start-up, calibration and operation of the burner
7.5
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 manual of the generator itself, in-
cluding 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. 167);
➤
to reduce the gas delivery and the CO
2
: turn the V1 screw
towards the “-” sign (Fig. 167);.
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.
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;.
7.5.1
Optimum calibration values
Tab. L
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. 166
Fig. 167
20076453
Maximum
Minimum gas flow adjustment (V2)
gas flow adjustment (V1)
Pressure point
downstream
Содержание RX 1000 S/PV
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