Temperature controller, normally closed, with central piece, time-controlled in polar white. Adjusts heating needs to individual lifestyles by regulating room temperature based on time and day of the week (program), with print. Suitable for heating or cooling operation, for room and underfloor heating. With integrated temperature sensor, regulation for underfloor heating is possible using room and/or external temperature controllers. Additional connection for external floor temperature/remote sensor available. Large, backlit display with text display. User languages adjustable: German, English, Dutch, or French. Maximum of 9 switching times per weekday, 3 pre-set time programs individually adjustable, programmable with the control panel detached. Switchable between manual and automatic operation, with automatic summer/winter time changeover (can be disabled). Temperature regulation range adjustable, with manual temperature value adjustment. Timer for hourly temperature changes, holiday program with date activation. Operating hour counter or energy consumption display adjustable, with valve protection function and frost protection function. With access protection. Control method PWM or 2-point (On/Off) selectable, PWM cycle time and hysteresis (for two-point control) adjustable. Type of actuator (power-off closed/open) adjustable, with self-learning heating curve, without spreading claws, with screw terminals. Neutral conductor required.