Beretta Power Plus Box 1001 EXT, Руководство по установке

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18
7 GAS VALVE CALIBRATION
Procedure
b
Gas valve calibration jobs must be done by the
Technical Assistance Centre authorized by
B
only.
The procedure for calibrating the gas valve is given here
below:
- place the exhaust flue probe of the combustion
analyzer into the socket on the clapet;
- make sure there is demand from the two room
thermostats. In case of problems with starting up
the burner after the ignition cycle, turn the adjusting
screws anti-clockwise by about 1 turn at a time;
- take the burner to maximum power from the control
panel by pressing key
”SET/ESC”
and together for
5 secs. This will make it possible to select max. speed
with the (par. nr.15). All the fans in the system will
work at the set speed; this will be displayed on the
first digit to the left. H = maximum speed. The other 2
digits will show the flow temperature (e.g.: T1=80°C);
- Adjust combustion by the screws shown in Figure
19 until reaching the rated CO2 value, (see table),
turning the screws clockwise to reduce the value;
-
N.B.
Turn anti-clockwise to increase the gas flow
capacity and clockwise to reduce it;
- leave the boiler to run regularly at maximum power,
then adjust calibration if necessary;
- take the burner to minimum power, pressing key ;
- the letter “L” (Low=, the boiler will go to minimum
power) will appear to the left on the display; use the
gas valve offset adjusting screws (see Figure 20) to
reach the ideal values given in the following table.
GAS MAX CAPACITY MIN CAPACITY
Natural gas CO2 = 8.9 - 9.1 CO2 = 8.9 - 9.1
Figure 19
Figure 20