Room temperature controller insert, 230 V~ with NC contact or NO contact, 1-way switch and control light Features: Control of electrothermal servos for 230 V~. Control of room temperature in closed rooms. Manual switch-off of temperature control. Input terminal for activating the cooling temperature (ECO) with the master clock. Input terminal for activating cooling mode with central control. Internal temperature sensor. Frost protection function. Silent switching. Temperature drop detection (calls up the frost protection temperature when the window is opened). Output signal: Pulse width modulation (PWM) or two-point control (On Off). Adaptation to valves (normally open or normally closed). Offset setting (correction value for the measured temperature). Setting range of the room temperature can be limited with setting rings. Valve protection function (opening and closing of the valve once a week).