According to ComStar, “The systems at the Pratt and Whitney facility had reciprocating compressors manufactured by Carlyle, a subsidiary of Carrier. The conversion went smoothly according to Carrier Commercial’s service supervisor for this job. He called the conversion quick, easy, and without complications before, during, or after.”
The refrigerant is a blend of HFC-125, HFC-134a, n-butane, isobutene, and isopentane; it is said not to require an oil change when being retrofitted into a system originally designed for R-22.
Publication date: 03/03/2008