Replace R22 with Isceon 29

[birdseed]

Hi folks,
This is my first post. Have 3-off Dunham-Bush Big 4 chillers running on R22.
Has anyone out there used this new "drop-in" replacement gas yet ???
It seems it will be ok with existing mineral oil in compressors....is this true ?
Incidentally, some of the compressors are 25 years old.

[geobird]

Hello birdseed,
I am also looking into converting recip chillers from 22 to ISCEON 29. The mineral oil is a big ?, DuPont in their marketing info implies "in most cases, no change of lubricant". What qualifies as "most cases"? I am waiting further information from Carlyle, the compressor manufacturer of our chillers, I'll pass on any new info.

[birdseed]

Hi Geobird,
Got your reply thank you. Have you heard any more re: Isceon 29 yet or word from Carlyle?

[BigJon3475]

You guys looked here yet?

http://www.refrigerants.dupont.com/Suva/en_US/pdf/k10942.pdf
http://www.refrigerants.dupont.com/Suva/en_US/products/isceon29.html
http://www.emersonclimate.com/images/pdf/2007CC-13.pdf

checkout the case studies:
http://www.refrigerants.dupont.com/Suva/en_US/apps/case_history/index.html