What additional disadvantage does R-407C have compared to R-22?

R-407C's tendency to separate into its component refrigerants is a notable disadvantage when compared to R-22. This separation can occur due to differences in vapor pressures of the components, particularly if the refrigerant is not handled or stored properly. If R-407C is subjected to conditions that lead to this separation, it can result in an unbalanced mixture of refrigerants, which negatively affects system performance and may even lead to damage to compressors and other components.

While other aspects of R-407C are important, such as environmental impact, global warming potential, and system compatibility, the issue of separation specifically highlights a practical challenge in the handling and maintenance of systems that utilize this refrigerant compared to R-22. This characteristic must be taken into account by technicians when working with R-407C to ensure proper refrigerant management and system efficiency.