The Robinair 17800C Multi-Refrigerant Machine is designed to recover, recycle, evacuate and charge many different refrigerants and systems, all in one fast and continuous operation through one hook-up. This unit automatically leads the user through its operations and sends specific notifications when its time to change the filter drier and vacuum pump oil, plus adjusts from liquid to vapor for fast and efficient recovery. The machine is ideal for mass transit vehicles, buses, refrigerated trailers or containers and other applications that use refrigerants other than R-134a. Notable features include a 5cfm vacuum pump, manual air purge function and easy-to-use 4.3" color graphical display.