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3.19 SOLAR PANELS COUPLING
The device is set up to receive pre-heated water from a system of solar panels up to a maximum temperature of 65°C. In any case, it is al-
ways necessary to install a mixing valve on the hydraulic circuit upstream of the device, on the cold water inlet.
To optimise the operation, where the probe is not already fitted on the boiler, the solar inlet probe kit is available on request (see wiring
diagram Fig. 53):
- If there is no probe kit, it is advisable to set parameter A6 (DHW thermostat) at "1";
- Otherwise, where the kit is installed or the probe is already present in the boiler, parameter A6 must be left at "0". This kit allows con-
necting a probe on the domestic cold water inlet pipe of the boiler to prevent unnecessary ignitions in systems with water heating
through solar systems or alternative sources. The boiler will not turn on if the inlet water is sufficiently hot.
In both conditions (probe present or not), we recommend setting parameter t3 (solar delay timing) at a time sufficient to let the water in-
side the D.H.W. circuit upstream of the boiler drain.
The greater the distance from the storage tank, the longer wait time will have to be set.
With these adjustments made, when a domestic withdrawal is requested, once the time set on parameter "t3" has passed, if the water en-
tering the boiler is at a temperature that is equal to or greater than that set, the boiler will not turn on.
For good functioning of the boiler; the temperature selected on the solar valve must be 5 °C greater with respect to the tempera-
ture selected on the boiler control panel.
3.20 PUMP ANTI-BLOCK
The appliance has a function that starts up the pump at least once every 24 hours for 30 seconds in order to reduce the risk of the pump
locking up due to prolonged inactivity.
3.21 THREE-WAY ANTI-BLOCK
In both phase "DHW", and "DHW - Heating", the appliance has a function that activates the motorised 3-way unit 24 hours after the last
time it operated by running a complete cycle in order to reduce the risk of the 3-way blocking due to prolonged inactivity.
3.22 RADIATOR ANTIFREEZE
If the system return water is below 4°C, the appliance starts up until reaching 42°C.
3.23 AMBIENT ANTIFREEZE
When the room temperature drops below 5°C (adjustable, see special functions chapter) a central heating request is made at minimum of
the power programmed.
This situation remains active until there is a variation in room temperature of 0.6°C equal to 5.6°C measured in the room where the con-
trol panel is positioned. The function is only active when the room control interface is set as Remote Panel (P. Rem.).
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