Results 1 to 2 of 2

Thread: 408a

  1. 18-11-2009, 04:43 AM #1
    the cooler's Avatar
    the cooler Guest

    Exclamation 408a



    can someone help me with a small problem retrofit a walk in freezer from 502 to 408a no info of charge on unit


  2. 18-11-2009, 02:25 PM #2
    oilzee's Avatar
    oilzee
    oilzee is offline regular poster
    Join Date
    Aug 2008
    Location
    malaysia
    Posts
    76
    Rep Power
    16

    Re: 408a

    Dear The Cooler ,

    Welcome to the RE . I have just retrofit 502 to 408a one month ago .
    Before i did the triple evacuation i change filter drier , change compressor oil ( 3 GS ) .
    I refill liquid to the system untill sight glass full ( 3/4 cans R408a, 3 Hp Bitzer compressor ) and got the result 6 TD evaporator temperature when reach to setting temperature , 17k at suction line inlet of compressor .
    I used full day to monitor the evaporating superheat ( adjusted expansion valve ). The pressures almost same like before retrofit .
    I had not change expansion valve .

    Regards
    oilzee
    Last edited by oilzee; 18-11-2009 at 03:29 PM.
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules