An R-502 Replacement for Limited Condensing Capacity Systems
Freon™ 408A (R-408A) refrigerant is a hydrochlorofluorocarbon (HCFC) option designed to replace the hydrofluorocarbon (HFC) refrigerant R-502. Older systems with limited condensing capacity, and low- or medium-temperature commercial refrigeration systems used in supermarkets often use R-502, which is now being phased out as part of the Montreal Protocol. Freon™ 408A (R-408A) is a very effective retrofit option for that equipment.
Because Freon™ 408A refrigerant performs well in applications requiring lower operating pressures, it's also a very effective alternative to Freon™ HP80 (R-402A).
Features and Benefits
This blended HCFC-based refrigerant offers other benefits, besides working with existing mineral oil (MO) that many unitary and close-coupled systems use.
An oil change isn't necessary when retrofitting systems from R-502 to Freon™ 408A. However, some original equipment manufacturers (OEMs) do recommend switching from MO to alkylbenzene (AB) oil to achieve optimum oil return. Consult your OEM for guidance.
A single compressor oil change to AB will typically remove 50-80% of the existing MO, which satisfies the recommendations and requirements of most compressor manufacturers.
Regulations on the long-term use of refrigerants vary by region and application, and may change over time. For the latest information, visit the Regulations page.
If you're looking for a low GWP alternative, consider the portfolio of Opteon™ refrigerants by Chemours.