Results 1 to 3 of 3

Thread: r404a

  1. #1
    rac tech's Avatar
    rac tech Guest

    r404a



    Is there anyone wants to explain me,why r404a is always charge at liquid?and not in gas,pls.help me.....thanks



  2. #2
    Join Date
    Jun 2009
    Location
    North East England
    Age
    41
    Posts
    714
    Rep Power
    19

    Re: r404a

    As with all belnded refrigerants which are identified with the 4 at the start of the R number are either zeotropic or aziotopic blends which are at different states at the same temp/pressure you need to charge as a liquid to ensure that the blend is kept correct
    by blends means several different refrigerants comined to make 1

  3. #3
    Join Date
    Dec 2008
    Location
    Portugal
    Age
    48
    Posts
    1,044
    Rep Power
    19

    Re: r404a

    If you have sure that you will evacuate all the refrigerant that is inside the vessel you don't need to charge on the liquid phase. However I think that for R404A (near azeotropic) if you charge on the vapor even if you let refrigerant on the vessel the consequences wouldn't be great.
    To make progress is never good enough, I want to do better and better and better

Similar Threads

  1. Max low side pressure in R404A system
    By Wilade in forum Technical Discussions
    Replies: 8
    Last Post: 25-08-2009, 09:23 PM
  2. Accidentally mixed R404A with R134a
    By toma in forum Trouble Shooting
    Replies: 1
    Last Post: 13-08-2008, 03:33 PM
  3. R507 to R404a
    By Andy AC in forum Commercial
    Replies: 2
    Last Post: 09-08-2008, 05:36 PM
  4. Why not R404a?
    By afak in forum Technical Speculations
    Replies: 12
    Last Post: 02-04-2007, 08:58 PM
  5. R134a or R404a
    By jingua_ph in forum Refrigerants
    Replies: 4
    Last Post: 27-09-2006, 03:31 PM

Posting Permissions

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