R-410A, R-404A, R-407C and R-134a are accepted on all chillers except those with scroll fans. ...R-513A, R-450A, R-1234ze (E), R-1336mzz (Z) and alkaline can be used for a variety of chillers (except R-1234ze (E) for modern circuits). ...R-1233zd (E) is only approved for chillers with diffusion fans.