Use of room temperature controller 230 V~ with break or make contact, off switch and control light - Control of electrothermal actuators for 230 V~. - Control of the room temperature in closed rooms. - Manually switching off the temperature control. - Input terminal for activating the setback temperature (ECO) via central clock. - Input terminal for activating cooling mode via central control. - Internal temperature sensor. - Frost protection function. - Silent switching. - Temperature drop detection (calling 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 (open when de-energized or closed when de-energized). - Offset setting (correction value for the measured temperature). - Setting range of the room temperature can be restricted using setting rings. - Valve protection function (opening and closing the valve once a week).