... delivery protection, reverse warning, prevent freezing protection and high and low pressure protection,etc..This machine has stable ... *2Refrigerant TypeR22Type of controlCapillaryExpansion valveEvaporatorTypeWater tank with coil(Shell and tube)Chilled fluid flow1.582.5834.15. ... 559.3Safety protectionCompressor over temperature,over current,high and low pressure,over temperature,flow switch,phase ...