... chiller has the following features: 1. Our compressor is imported from Italy, France and so on, being of high-quality built-in ... ,the other can be working or not.6. Use PLC microcomputer control from Germany Siemens LCD touch screen, both English and Chinese ... .Our standard refrigerant is R22, but you can choose to use environmental refrigerant such as R407C , R134A or R507.