Manitowoc Ice Refrigerant Conversion Procedure R-502 to R-402B enables you to convert your ice machine refrigerant from R-502 to R-402B (HP81). It provides a detailed step-by-step guide, including safety precautions, equipment modification requirements, system performance expectations, and special instructions for G600 expansion valve and G1700 remote models. By following this procedure, you can safely and effectively convert your ice machine, ensuring optimal performance with the new refrigerant.