Hitachi screw compressor Converting to R-407C

[Novema]

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?

 

[jcavti]

Hi,

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?

 

[Novema]

Thanks for your respons.
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

 

[jcavti]

Hello Again,

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:

http://www.ineosfluor.com/refrigeration/klea/casestudies/PDF/hitachi.pdf

Good luck and...

Stay cool

 

[jcavti]

Novema,

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