Description / Abstract:
This SAE Recommended Practice applies to refrigerant blends
(multicomponent refrigerants) intended for use as retrofit
refrigerants to replace CFC-12 (R-12) in mobile air-conditioning
(A/C) systems. Since the composition of non-azeotropic refrigerant
mixtures changes as refrigerant is lost, either through the vapor
phase or the liquid phase, the method of charging A/C systems is
important. The purpose of this document is to determine the proper
refrigerant phase. liquid or vapor, for system charging by relating
system performance changes to the charging method.
This document is complete only when combined with the
requirements of SAE J1657.