SIEMENS RDF300 Flush-mount room thermostat for rectangular conduit box, for 2-/4-pipe fan coils or DX type equipment, backlit LCD Flush-mount room thermostat for rectangular conduit box with LCD for fan coil units and compressors in DX-type equipment Output for 3-speed or 1-speed fan 2 or 3-position control outputs Two multifunctional inputs for keycard contact, external room / return air temperature (QAH11.1, QAA32), heat / cool changeover, operation mode changeover, window contact on/off, dewpoint monitor, electrical heater enabled, fault contact Operating modes: Comfort, Energy Saving and Protection Automatic or manual heating/cooling changeover Adjustable commissioning and control parameters Minimum and maximum setpoint limitation Color of housing: signal white (RAL 9003) Backlit display Application selectable: 2-pipe system 2-pipe system with electrical heater 4-pipe system