Thermostatic device and sanitary water supply and/or dispensing system comprising such a thermostatic device

A thermostatic device for a duct of a sanitary water distribution and delivery system, the thermostatic device comprises:

• a temperature meter configured to detect a temperature of sanitary water entering, exiting or flowing through the thermostatic device,
• a flow regulator configured to regulate a flow of the sanitary water from said thermostatic device, and
• a control unit operatively connected to the temperature meter and to the flow regulator,
• wherein said flow regulator is arranged to operate according to a first operating mode and according to a second operating mode,
• wherein the first operating mode is a steady-state operating mode in which the flow of the sanitary water at the outlet of said thermostatic device is a steady-state flow rate, and
• wherein the second operating mode is an operating mode to reach a steady state in which the flow of sanitary water exiting from said thermostatic device is a reduced flow rate lower than said steady-state flow rate,
• wherein said control unit is configured to determine, by acquiring or calculating, a reference temperature and to arrange a switching of the operating mode of said flow regulator from said second operating mode to said first operating mode when a temperature of the sanitary water measured by said temperature meter is in a predetermined relationship to the reference temperature,
• wherein said control unit is further configured to perform a calibration procedure, including moving the flow regulator, to determine a set degree of opening of the flow regulator causing said reduced flow rate to exit from said thermostatic device,
• wherein the control unit, in executing said calibration procedure, is configured to:
• arrange said flow regulator to a prefixed degree of opening, wherein said prefixed degree of opening is in a range from a fully closed condition in which no water flows through the thermostatic device to a maximum water flow passage open condition in which a maximum water flow passes through the thermostatic device,
• if water flows through the thermostatic device while the flow regulator is at said prefixed degree of opening, decreasing a degree of opening of the flow regulator until no water flow passes through the thermostatic device and determining a set degree of opening of the flow regulator based on a degree of opening at which the water flow transitions from a flow of the sanitary water through the thermostatic device to an absence of water flow through the thermostatic device, wherein the degree of opening at a transition from the flow to the absence differs from a fully closed condition of the flow regulator;
• and
• if no water passes through the thermostatic device when the flow regulator is at said prefixed degree of opening, increasing the degree of opening of the flow regulator until a flow of sanitary water is detected through said thermostatic device and determining the set degree of opening of the flow regulator based on the degree of opening at which the flow transition between an absence of the sanitary water flow to the flow of the sanitary water, wherein the degree of opening causing a transition from the absence to the flow different differs from the fully closed condition of the flow regulator.