4.GAS ADJUSTMENTS
CATEGORY II2H3+ |
| Methane Gas | Liquid Butane Gas | Liquid Propane Gas |
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| G20 | G30 | G31 |
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Lower Wobbe Index (15°C;1013mbar) | MJ/m3h | 45.67 | 80.58 | 80.58 |
Nominal Delivery Pressure | mbar | 20 | 29 | 37 |
Minimum Delivery Pressure | mbar | 17 | 20 | 25 |
23 MFFI |
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Main Burner: n. 13 jets (ø ) | mm | 1.30 | 0.77 | 0.77 |
Consumption (15°C; 1013mbar) | mc/h | 2.72 | ||
Consumption (15°C; 1013mbar) | Kg/h | 2.02 | 2.02 | |
Gas Cock Outlet Pressure |
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max - min | mbar | 11.0 - 2.0 | (*) - 6.0 | (*) - 6.0 |
27 MFFI |
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Main Burner: n. 15 jets (ø ) |
| 1.30 | 0.77 | 0.77 |
Consumption (15°C; 1013mbar) | mc/h | 3.15 | ||
Consumption (15°C; 1013mbar) | Kg/h | 2.34 | 2.31 | |
Gas Cock Outlet Pressure: |
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max - min | mbar | 11.0 - 1.6 | (*) - 4.6 | (*) - 6.0 |
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[1 mbar = 10,197 mmc.a.]
4.1CHANGING THE TYPE OF GAS
The outlet pressure of the gas cock is obtained by completely loosening the screw on the solenoid. The maximum pressure of the gas to the burner will be equal to the nominal delivery pressure minus the head loss within the gas valve.
The boiler can be converted to use either methane (natural) gas (G20) or LPG (G30 - G31) by an Authorised Service Centre.
The operations that must be performed are the following:
1.Replace the jets on the main burner (see table in section 4);
2.Adjust the maximum and minimum thermal capacity values for the boiler (see table in section 4);
3.Replace the gas rating plate;
4.Adjust the maximum thermal power setting;
5.Adjust the
6.Adjust the ignition delay feature for the heating system (can be set from 0 to 2 mins.).
CATEGORY II2H3+ | Methane | Liquid | Liquid |
| Gas | Butane | Propane |
| G20 | Gas | Gas |
|
| G30 | G31 |
Recommended Soft- |
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light Pressure | 8.0 | 16.0 | 16.0 |
(mbar) |
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20
