The fan "sucks" air from the room and directs it to the heat exchanger. An energy carrier flows through the heat exchanger (cold or hot water, depending on the season of the season).
Water circulating in the inner cavity of the heat exchanger takes or transfers heat to the air flowing along the outer cavity of the heat exchanger. At the exit of the fan coil, cooled or heated air returns to the room - the desired temperature.
As a coolant, fresh water or water can be used in the heat exchanger with the addition of a certain concentration of non-freezing solution coming from the chiller. The maximum working pressure of the coolant is 1.6 MPa.
Fresh water or water with a concentration of non-freezing solution coming from the district heating network is also used as a heat carrier. Also, electric heating elements (thermal heating elements) can be used as heating elements. Thermal heating elements are installed as an additional option to two-pipe fan coil units.
Fancoil can operate both in air recirculation mode and in mixed mode, that is, connect the air from the room with fresh prepared air from the central air supply system.
In the air cooling mode, when warm air comes into contact with the cooled surface of the heat exchanger, condensate appears on the heat exchanger, which collects in a pan and flows by gravity into the drainage system.