NRT 300: Electronic air-conditioning controller, heating/cooling, equiflex 

 How energy efficiency is improved Key directly on device for individual changeover between presence and absence  Areas of use Individual unitary control and zone control (heating, cooling, heating/cooling) e.g. in air conditioning systems (2- or 4-pipe systems) in hotels and residential and business spaces.  Features • Air-conditioning controller for 2- and 4-pipe systems (heating, cooling, heating/cooling) • Measurement of room temperature by either integrated or external temperature sensor • Saves energy costs by means of presence/absence key and rotary knob on front • Inputs for C/O signal, changeover between presence and absence, dew-point monitoring and setpoint shift • Choice of P or PI control with 2-point, pulse-pause, 3-point or outputs (0...10 V) • LED indicator • Servicing level with adjustable control parameters • Frost-protection facility • Electrical connection in baseplate • Electronics in attachable housing