45
User instructions
for the user
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 electri-
cal 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 when-
ever the temperature of the water - in the heating circuit or in the tank 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.
Moreover, the boiler in stand-by activates periodically the main internal components to prevent the
exceptional cases of Lock out due to the inactivity in presence of water and scale. This happens
also if the boiler goes in Lock Out state (red lamp on or flashing).
“ROOM ANTIFREEZING” FUNCTION
If the flat (where the boiler is installed) remains unused for a period with cold temperature, you can
consider the possibility to extend the antifreezing capability of the boiler, to all the heating system
(and to the flat rooms). Also in this case, are needed the presence of all supplies (electric, gas) and
the correct system pressure.
— if the REMOTE CONTROL (original optional kit) is installed the antifreeze function is auto-
matically started by putting the boiler in Stand-by by means of the relevant pushbutton on the
Remote Control. The boiler, the rooms and the DHW tank will be kept at a minimum tempera-
ture as to avoid the freezing of the liquids in them;
— if a common thermostat or chronothermostat is installed, featuring* an “anti freezing” func-
tion and you want to use it, it’s necessary to set the boiler in Winter
mode and NOT in
Stand-by, to allow it to heat the heating circuit when the room temperature sensor requires it. To
avoid extra gas consumption, it’s advisable to ask a technician to set the tank temperature to
the minimum, as described in “Hydraulic section” paragraph, “Regulation” section, back in this
handbook (otherwise boiler will heat the water in the tank, without any reason).
*
if it’s without this specific function, it’s possible anyway to set the room temperature to a few degrees above the
freezing temperature, in e5°C (if you have a chronothermostat, remember to choose the manual
mode).
