Controller that takes as an input the room air temperature
TRoo and the supply water temperature
TSup, and outputs the commanded mixing valve position
yVal.
Based on the room air temperature TRoo, and the
user adjustable parameters for the minimum supply water temperature
TSupMin, the maximum supply water temperature
TSupMax and the room air temperature
TRooMin at which the supply water temperature is at
TSupMax, the controller computes a set point for the
supply water temperature. This set point is then used with the
measured supply water temperature TSup as an input to
a PI-controller that computes the commanded valve position
yVal.