Freon™ 404A (HP62) has been the long-standing HFC replacement for R-502 and R-22 in refrigeration applications. HFC-404A is included in the U.S. EPA SNAP de-listing of HFCs that will no longer be acceptable in certain end use applications in the U.S. market. There are no U.S. regulations currently impacting the HFC service market. Refer to the Summary of U.S. EPA SNAP Regulations Pertaining to Refrigerants.
Learn about Opteon™ XP40 (R-449A) and Opteon™ XP44 (R-452A), low global warming potential (GWP) hydrofluoroolefin (HFO) based refrigerant replacements for R-404A in new equipment and for retrofit of existing equipment.
ASHRAE
R-404A; A1 Safety Classification
Replaces
R-502
Applications
Benefits
- Close Match for R-502: Works over the entire R-502 operating range.
- OEMs recommend POE oil for optimum reliability.
Phaseout Schedule
Consult the specific regulations in your country or region.
Lubricant Recommendation
POE
A blend of R-125, R-143a, and R-134a intended for low and medium temperature refrigeration applications where R-502 was previously used. Most new supermarket and refrigeration equipment has been built for an HFC such as R-404A, R-507, or R-407A. It is also possible to retrofit charge R-507 systems with R-404A. R-404A has slightly lower pressures than R-507 (from the small amount of R-134a added), and generally both blends have slightly higher pressures than R-502. R-404A requires polyolester (POE) lubricant, which is usually charged into new equipment. If retrofitting existing equipment, the original oil must be replaced with POE.
How to Draw a Refrigeration Cycle (1)
https://www.jsrae.or.jp/jsrae/stady/Eng%20saikuru.htm
US 1537 
CN 304 
MY 263 
AP 149 
AU 48 
DE 35 
SG 31 
AR 25 
