Immergas HYDRO 3 V2 User Manual page 46

Fan coil wiring diagram.
Circulation for temperature detection
If activated, it allows air to circulate at low speed at regular
intervals for more precise control of the room temperature.
Temperature offset for valve closure
Allows you to select at which temperature below/above the
set point to close the 2-way valve.
Anti-cold blast function
It prevents the unit from staying on in heating mode when
the inlet water temperature is too cold
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