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Hello, Tell us more about the process (eg. temps, product, schedule,...) How is it today? How many degrees you should drop? What is the optimal cooling temperature? What's the process fluid? I believe that you could get more practical answers. Stay Cool...

HI Friends, First, sorry about my poor english. Cooky is correct as usual. As a HITACHI application engineer in Brasil, I must include HITACHI SET FREE System in the wall. see the site: http://www.hitachiaircon.com/hac/en/range.jsp?range_ref=2 For a very simple explanation, the condenser unit...

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...

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...

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...