A. With direct electrical heating, all wall radiator or room thermostats are set one or two degrees higher than the temperature you want in the room. The temperature is then controlled with the temperature sensor(s) of the system. The above setpoint adjustment is done so that if there would be malfunction in some equipment, you would still have the desired temperature in your rooms, in fact a bit higher.
B. With underfloor waterborne heating, room or radiator thermostats are not tampered. They regulate the temperature as before. The system only regulates warm water tank heating. The temperature sensor connected to the system is only used for indicating the measured temperature in the user interface.
Installer makes all above thermostat settings when configuring the system.