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  1. jcavti

    How can I get lower temp?

    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...
  2. jcavti

    Multiple DX coils for single condenser

    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...
  3. jcavti

    Hitachi screw compressor Converting to R-407C

    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...
  4. jcavti

    Hitachi screw compressor Converting to R-407C

    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...
  5. jcavti

    Hitachi screw compressor Converting to R-407C

    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...

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