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IMPORTANT:
Regularly check that the pressure displayed on the pressure gauge is 0.5 - 1 bar, with the system cold. In case of
overpressure, open the boiler drain valve. If pressure is lower, open the boiler filling tap (figure 3).
Open the tap very slowly in order to vent the air.
During this operation, the boiler must be "OFF" (press
In case pressure drops occur frequently, have the boiler checked by an authorised Service Engineer.
System filling tap
Figure 3
The boiler is fitted with a differential hydraulic pressure gauge which prevents the boiler from working if the pump is blocked or if there
is no water.
To turn off the boiler, disconnect the electric power supply. With the gas boiler in the "OFF" mode (section 3.2), the electric circuits
remain powered and the frost protection function is enabled (section 7).
7. PROLONGED SHUTDOWN. FROST PROTECTION
Do not drain the whole system as filling up with water again causes unnecessary and harmful scale to build up inside the boiler and the
heating elements. If the boiler is not used during winter and is therefore exposed to the danger of frost, add some specific anti-freeze to
the water in the system (e.g.: propylene glycol coupled with corrosion and scale inhibitors).
The electronic boiler management system includes a "frost protection" function for the heating system which, when delivery temperature
falls below 5°C, operates the burner until a delivery temperature of 30°C is reached.
The frost protection function is enabled if:
* the boiler is electrically powered;
* the gas tap is open;
* the system is at the correct pressure;
* the boiler is not blocked.
The boilers can operate both on natural gas and LPG.
All gas conversions must be made by an authorised Service Engineer.
INSTRUCTIONS FOR USERS
5. FILLING THE SYSTEM
- figure 1).
Storage boiler drain tap
6. TURNING OFF THE BOILER
8. GAS CONVERSION
36
System drain tap
926.008.2 - EN
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