Results 1 to 4 of 4
  1. #1
    Join Date
    Feb 2010
    Location
    England
    Posts
    32
    Rep Power
    0

    More questions. (I know I am pain but I am just curious)



    1) What sort of time would you expect for pressure to equalise on a domestic refrigeration cabinet?

    2) Is there a minimum time after having vac'ed out a system that you should leave your vacuum gauge before you are happy there is no loss of vacuum?

    3) I have seen a piece of literature that related to an AC unit on a bus or coach, I believe. It said about vac'ing to at least 500 Microns (I don't have a micron gauge, just a vacuum gauge in mBars) & leaving for 5 mins & if it doesn't rise by a further 500 microns from when the vac pump is switched off, the system is ok. Does this also apply to domestic refrigeration & if so, how can I translate 500 microns into Mbar?

    Thanks again guys.



  2. #2
    Join Date
    Sep 2007
    Location
    Split Croatia
    Age
    57
    Posts
    6,175
    Blog Entries
    6
    Rep Power
    36

    Re: More questions. (I know I am pain but I am just curious)

    2)
    http://www.refrigeration-engineer.co...70&postcount=1
    3)
    You need to use electronic vacuum gauge to clearly see this difference and dedicated (special) hoses which don't leak since regular service hoses are not designed to keep pressure from outside (or use copper pipes instead of hoses) and may lead you to wrong conclusions that system is leaky or moisture is present.

    1 micron = 0,001333223684 mbar
    Last edited by nike123; 13-03-2010 at 06:23 PM.

  3. #3
    Join Date
    Sep 2007
    Location
    Split Croatia
    Age
    57
    Posts
    6,175
    Blog Entries
    6
    Rep Power
    36

    Re: More questions. (I know I am pain but I am just curious)

    This should answer all your questions about vacuum drying/evacuation.
    http://www.mediafire.com/?zmyztx5gnzm

  4. #4
    Join Date
    Feb 2010
    Location
    England
    Posts
    32
    Rep Power
    0

    Re: More questions. (I know I am pain but I am just curious)

    Blimey!

    Cheers mate.

Similar Threads

  1. Interview questions
    By derfal10 in forum Training
    Replies: 15
    Last Post: 23-12-2011, 10:59 AM
  2. Please help with these questions!!
    By tsl001 in forum Supermarket Refrigeration
    Replies: 31
    Last Post: 05-05-2010, 11:19 AM
  3. 2.5 specific Dx gshp heat exchanger questions
    By Riggerjack in forum Heat Pumps
    Replies: 14
    Last Post: 26-01-2009, 12:42 AM
  4. Interview questions
    By zimbo in forum Chit Chat & Service Stories
    Replies: 16
    Last Post: 10-09-2008, 10:06 PM
  5. Starting a compressor, and receiver questions.
    By DaBit in forum Technical Speculations
    Replies: 9
    Last Post: 24-08-2002, 12:37 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
  •