for the user
• If in the room where the boiler is installed there are mantelpieces, stoves, coal stoves
or similar, fans for the Air Outlet, such as wall fans, aspiring cowls for cooking boards
with outlet pipe, let the technician check that the inlet is correctly OVERSIZED or that
there are the ADDITIONAL Inlets as prescribed by the laws in force, because,
otherwise, these devices interfere with the evacuation of the Boiler’s Flue.
Boiler inactivity
The effects of the periods of inactivity can be relevant in particular situations such as in flats used
only for some months per year, most of all in cold places.
The user will have to decide to put the boiler in the SAFETY LOCK OUT state disconnecting all
the supplies, or to leave it in stand-by and use the Anti Freezing Function. In general it is better
to use the SAFETY LOCK OUT. When there is the possibility of freezing it is convenient to chose
between the advantages and the disadvantages of the SAFETY LOCK OUT and of the Stand By/
Anti Freezing Way.
SAFETY LOCK OUT
— Turn off the general switch on the Electrical Supply Line of the Boiler;
— Close the Gas Tap;
When it is expected that the temperature is going to decrease under 0°C and the system
doesn’t include the Anti Freezing Function, empty the heating system totally, or fill it with an
Anti Freezing Solution.
Notice that if it had been necessary to restore the pressure (because of possible loss) in an
heating system already filled with an Anti freezing solution, the concentration of the system
could have decreased and it could not guarantee the Anti freezing Protection.
REMARK: the boiler is equipped with a system which protects the main components from the
exceptional cases of LOCK OUT, due to the inactivity in presence of water and scale. The Anti
Lock out System can’t work during the Safety Lock Out Process, because of the lack of electrical
supply.
STAND-BY AND ANTI FREEZING/ANTI LOCK OUT FUNCTION
The boiler is equipped with an Anti freezing System which provides the ignition of the boiler whenever
the temperature of the water in the heating circuit inside the boiler decreases under 5°C and which
provides the turning off when the temperature reaches 30°C. In order to activate the Anti Freezing
Function:
• electrical power supply MUST be ON;
• boiler must be left in stand-by mode (Summer/Winter selector on 0, green lamp flashing);
• the gas must be left open;
• system pressure must be correct (1÷1.5 bar in a cold state, minimum 0.5 bar)
In case of lack of gas, the burner won’t turn on and the boiler will go in LOCK OUT state (red lamp
on or flashing). Nevertheless the pump will work, making the water circulate in the system and
reducing in this way the possibility of freezing. It is available, on demand, an Anti freezing
Electrical resistance kit which must be installed on the secondary exchanger to protect the
boiler also in case of lack of gas.
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