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| off status. After the system has been allowed to cool, the system can be reset |
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| by pressing the button “A”. |
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| 4 - Limescale |
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| This is an indirect control (actuated through the regulation of the temperature in |
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| the primary heat exchanger) on the formation of limescale in the secondary |
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| heat exchanger. Regardless of the flow rate and the temperature in the circuit |
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| for the domestic hot water, the temperature is limited to 62°C. |
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| 5 - Safety |
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| At the start of every lighting phase, the P.C.B. performs a series of internal |
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| controls. If a malfunction occurs, the boiler will shutdown until the problem has |
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| been resolved. |
3.9 | Draining the System | Draining the heating system. |
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| The heating system must be emptied as follows: |
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| - Turn off the boiler; |
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| - Open the drain valve for the system and place a container below to catch the |
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| water that comes out; |
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| - Empty the system at the lowest points (where present). If you plan on not |
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| using the heating system for an extended period of time, it is recommended |
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| that you add antifreeze with an ethylene glycol base to the water in the |
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| heating lines and radiators if the ambient temperature drops below 0°C during |
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| the winter. |
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| This makes repeated draining of the entire system unnecessary. |
Draining the domestic hot water system.
Whenever there is the danger of the temperature dropping below the freezing point, the domestic hot water system must be drained as follows:
- Turn off the general water valve for the household plumbing system; - Turn on all the hot and cold water taps;
- Empty the remaining water from the lowest points in the system (where present).
4.GAS ADJUSTMENTS
CATEGORY II2H3+ |
| Methane Gas | Liquid Butane Gas | Liquid Propane Gas |
|
| G20 | G30 | G31 |
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|
Lower Wobbe Index (15°C;1013mbar) | MJ/m 3h | 45.67 | 80.58 | 70.69 |
Nominal Delivery Pressure | mbar | 20 | 30 | 37 |
Minimum Delivery Pressure | mbar | 17 | 20 | 25 |
A/23 MFFI |
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|
Main Burner: n. 13 jets (ø) | mm | 1.,25 | 0.72 | 0.72 |
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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|
|
|
min - max | mbar | 11.4- 2.0 | 27.5 (*) - 5.2 | 35.0 (*) - 7.0 |
A/27 MFFI |
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|
|
|
Main Burner: n. 15 jets (ø) |
| 1.25 | 0.72 | 0.72 |
Consumption (15°C; 1013mbar) | mc/h | 3.16 | ||
Consumption (15°C; 1013mbar) | Kg/h | 2.35 | 2.32 | |
Gas Cock Outlet Pressure: |
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|
|
|
max - min | mbar | (*) - 4.8 | (*) - 6.0 | |
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|
(1mbar = 10,197 column of water)
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.
B023 | 21 |