Hitachi screw compressor Converting to R-407C
Hitachi screw compressor Converting to R-407C
(OP)
hello!
Are there any who have experience of converting Hitachi screw compressors in serie 2(x002SC-H)to the use of R-407C.
This compressor are originally ment for R-22.
Hitachi say it's not recommended, because the terminal seals will leak.
Any other experiences?
Are there any who have experience of converting Hitachi screw compressors in serie 2(x002SC-H)to the use of R-407C.
This compressor are originally ment for R-22.
Hitachi say it's not recommended, because the terminal seals will leak.
Any other experiences?





RE: Hitachi screw compressor Converting to R-407C
First sorry about my poor english. I'm not an expert, but some tech papers I have about these comps sugests retrofit using from R22 to R407c with following precautions:
lubrificant for R22 is mineral origin and r407c is sintetic (poliol ester or POE). You must be sure of a good refrigerant cicle cleaning before charging the ref and the new lubf. Attencion: lubf contamination causes compressor bearings failure. I really don't know anything about seal. Where are you from? Does your quest was send to Hitachi Japan or US?
RE: Hitachi screw compressor Converting to R-407C
My company are in Norway.
I recived the notice from Hitachi, Europe.
If you have any documentation on the issue i'd be happy if you could send it to me.
espen.spondalen@novema
http://www.novema.no
RE: Hitachi screw compressor Converting to R-407C
It was my first time on site, and I thought that most of forum pals were from US. I'm sorry. I know there is a HITACHI plant at Barcelona.
About my tech papers I think it will not usefull for you. They were written in Portuguese (I'm from Brasil).
Otherwise, you must see it:
www.ineosfluor.com/refrigeration/klea/casestudies/PDF/hitachi.pdf
Good luck and...
Stay cool
RE: Hitachi screw compressor Converting to R-407C
As a correction to first post, please take note:
Compressor Series 2 in Europe always uses sintetic poliol ester oil (SR30). Recently, in Series 5, they changed for Castrol Icematic SW220HT (desevolved for HITACHI only).
There's no graeter contamination risks between them. A good vacuun it's enought. Consider possibility make your gas retrofit by the overhaul stop.
Stay cool