Refrigerant R422A for old R22 plants
R422A is an HFC mixture that serves as a substitute for R22, R502 and HCFC-containing refrigerant mixtures (R402A, R402B and R409A) in low temperature commercial and industrial refrigeration systems with direct evaporation. It is also used in medium temperature systems.
According to the F-gas Regulation, the high GWP value 3,134 (> 2,500) means that R422A can no longer be used after the year 2020.
Applications and use
R422A has still served as a replacement in older R22 plants – primarily refrigeration and freezer systems in commercial outlets.
Replacements for R422A
Replacement or alternative refrigerants are f.ex. R427A, R428A, R438A.
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Want to know more?
Read/load f.ex. this publication of academia.edu / Applied Thermal Engineering: