20029918
18
GB
Operation
6.5
Gas valve adjustment
The adjustment of the output of gas is achieved by using the two
screws V1 and V2 (Fig. 15).
To alter the maximum output of gas act on the screw V1.
–
To increase the output: turn the screw V1 anticlockwise (un-
screw).
–
To reduce the output: turn the screw clockwise (tighten).
To alter the minimum output of gas act on the screw V2 on the
gas valve.
Remove the protection screw and act on the intern screws with a
hex key.
–
To increase the output: turn the screw clockwise (tighten)
–
To reduce the output: turn the screw anticlockwise (unscrew)
6.6
Burner adjustment
The optimum adjustment of the burner requires an analysis of
flue gases at the boiler 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 CO and
CO
2
concentration in the flue gases and of their temperature.
Check in sequence:
•
Maximum output
•
Minimum output
•
Ignition output
6.6.1
Maximum output
Maximum output
should match the value required by the boiler
that is used.
To increase or decrease its value, adjust the trimmer MAX locat-
ed on the control box (Fig. 14).
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
8.5 ÷ 9% or O
2
5÷5.5%.
To correct these values act on the gas valve in the following way:
–
to increase the gas delivery and the CO
2
: turn the screw V1
anticlockwise (unscrew).
–
to reduce the gas delivery and the CO
2
: turn the screw V1
clockwise (tighten).
6.6.2
Minimum output
Minimum output should match the value required by the boiler
that is used. To increase or decrease its value, adjust the trimmer
MIN located on the control box (Fig. 14).
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
8.5÷9% or O
2
5÷5.5%.
To correct these values act on the gas valve in the following way:
–
to increase the gas delivery and the CO
2
: turn the screw V2
clockwise (tighten).
–
to reduce the gas delivery and the CO
2
: turn the screw V2 an-
ticlockwise (unscrew).
6.6.3
Ignition output
The
ignition output
can be varied by acting on the Trimmer
START located on the control box (Fig. 14).
Fig. 15
D7375
Minimum gas flow adjustment
on the stabiliser (
V2
)
Maximum gas flow
adjustment (
V1
)
