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  1. #1
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,069

    purging and pressuring ac with n2

    hi every one
    i want to use n2 in purging and testing ac for leaks
    and first time to me
    my q are
    1_ what precautions i must make in care when use n2 in purging etc....
    2_ which type of n2 i must use
    because in iraq we have pure n2 only but some experts adviced me to use impure n2 cylinder which contain 90% n2 and 10% oil because its best than pure n2 in purging and testing

  2. #2
    Join Date
    Apr 2010
    Location
    NC Sandhills
    Posts
    404
    This is not a do it your self site but I will give basic safety information. The main precaution is use a pressure regulator that is in good shape, has a clean over pressure release valve and check hoses for cuts or tears and max working pressure! Max pressure depends on system and equipment, read labels. Wear safety glasses. Use pure nitrogen only. Bad gas and oil can contaminate the system. Unless they meant to add a little refrigerant so an electronic leak finder can also be used.

  3. #3
    Join Date
    Jul 2007
    Location
    Mount Airy, MD
    Posts
    7,281
    Thread relocated to "Tech to Tech"

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,913
    Use pure/dry nitrogen. You don't want to be adding oil to a refrigeration system when you flow or pressure test with nitrogen.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    Apr 2001
    Location
    MINN
    Posts
    938
    Are you serving in the Military

  6. #6
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,069
    Quote Originally Posted by beb View Post
    Are you serving in the Military
    ???????????????????
    i dont understand

  7. #7
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,069
    thanx to every one for help
    now my question
    can i use the same type o2 gas regulater with n2 cylinder
    i use this type with o2 cylinder
    Name:  Yamato_Gas_Regulator.jpg
Views: 449
Size:  13.6 KB

  8. #8
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,069
    up

  9. #9
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,567
    Quote Originally Posted by kefah View Post
    thanx to every one for help
    now my question
    can i use the same type o2 gas regulater with n2 cylinder
    i use this type with o2 cylinder
    Name:  Yamato_Gas_Regulator.jpg
Views: 449
Size:  13.6 KB
    You would use a SIMILAR regulator, but not the SAME regulator.

    The cylinder connection is different.

  10. #10
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,069
    Quote Originally Posted by jpsmith1cm View Post
    You would use a SIMILAR regulator, but not the SAME regulator.

    The cylinder connection is different.
    no the cylinder connection is the same

  11. #11
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,567
    Quote Originally Posted by kefah View Post
    no the cylinder connection is the same
    Not on my cylinders.

    There really isn't a reason that an oxygen regulator wouldn't work on a nitrogen tank and vice-versa.

    I would be very careful about crossing them, though, because oxygen can be nasty stuff. If even a tiny amount of oil is present, you could see an explosion.

  12. #12
    Join Date
    Aug 2012
    Location
    Iraq
    Posts
    1,069
    thank u for help

  13. #13
    Join Date
    Oct 2012
    Location
    Smallville
    Posts
    120
    Check data plate for test pressures. It will have low and high side pressures. Don't go any higher than the low side pressure.

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