35
INSTALLER Section (en)
7110102.03 (1-06/13)
Burner injector-pressure table
1.24 F - 24 F 18 F - 14 F - 1.14 F
Gas type G20 G31 G20 G31
Injector diameter (mm) 1.35 0.85 1.18 0.77
Burner pressure (mbar*)
REDUCED HEAT OUTPUT
2.1 5.4 3.6 7.8
Burner pressure (mbar*)
RATED HEAT OUTPUT
11.8 28.8 11.6 24.7
N° injectors 11 11
* 1 mbar = 10.197 mm H
2
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D) Electronically calibrate the gas valve
D1) Electronically adjust to reduced heat output:
• set parameter F08-F09 = 0 following the procedure described in the SETTING PARAMETERS section;
• open a hot water tap that can provide a ow rate of at least 10 litres a minute or make sure there is maximum heat demand;
• slowly increase (not more than 2 points at a time) the value of parameter F45 until the pressure read with the pressure gauge
increases; then reduce the value of F45 by 2 points and press to save.
D2) Electronically adjust to nominal heat output:
• set parameters F08-F09 = 100, F48 = 50;
• open a hot water tap that can provide a ow rate of at least 10 litres a minute or make sure there is maximum heat demand;
• slowly increase (not more than 2 points at a time) the value of parameter F48 until the pressure read with the pressure gauge
reaches the value indicated in the burner pressure/injectors table (NOMINAL HEAT OUTPUT); then increase the value of F48
by 2 points;
• set parameters F64 = 0, F18 = 0 and press to save;
• turn off the two-pole switch to disconnect the boiler from the power supply for at least 5 seconds;
• put the front panel back in place.
E) Final checks
• Note down the conversion on the boiler rating plate, specifying the type of gas and indicating that calibration was performed.
After performing electronic calibration, set parameter F08-F09 as shown in the table below.
24 F 1.24 F – 18 F 14 F 1.14 F
G20 - G25.1 G31 G20 - G25.1 G31 G20 - G25.1 G31 G20 - G25.1 G31
F08 055 060 100 050 060 050 060
F09 100 100 100 050 060
If ashes on the display when calibrating the gas valve, disconnect the boiler from the power supply and repeat the
calibration procedure starting from point B).
12.2 REPLACING THE GAS VALVE
When replacing the gas valve, perform the following operations:
• switch off the boiler;
• close the gas inlet valve;
• replace the gas valve;
• open the gas inlet valve and make sure there are no gas leaks;
• perform the operations described in points B, C, D of the GAS CONVERSION section.
12.3 GAS VALVE CALIBRATION
To calibrate the gas valve, perform the operations described in points B, C, D of the GAS CONVERSION section.
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