Control of electrothermal actuators for 230 V~. Controlling the room temperature in enclosed rooms. Manual switch-off of temperature control. Input terminal for activating the cooling temperature (ECO) via central clock. Input terminal for activating cooling mode via central control unit. Internal temperature sensor. Frost protection function. Silent switching. Temperature drop detection (calling up the frost protection temperature when a window is opened). Output signal: Pulse width modulation (PWM) or two-point control (on/off). Adaptation to valves (normally open or normally closed). Offset adjustment (correction value for the measured temperature). The adjustment range of the room temperature can be limited with adjustment rings. Valve protection function (1x weekly opening and closing of the valve).