EDITOR’S NOTE: Retrofitting HFC refrigerants into systems designed for HCFC-22 is gaining attention especially in refrigeration because that sector moved especially fast to R-22 when CFCs faced phaseout. This article from Honeywell is a detailed look at the retrofit procedures. While specifically related to the HFC refrigerants R-407C and R-422D, it gives contractors and service technicians a good idea of what’s involved in such retrofits. As with any retrofit procedures, contractors are encouraged to contact refrigerant and equipment manufacturers for guidance.
HCFC-22 is a high-capacity, efficient refrigerant employed in a significant number of air conditioning and refrigeration systems. The majority of these systems utilize mineral oil lubricants.