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  1. #1
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811

    Leaking Absorbtion unit

    We have a 10 year old Trane gas fired absorber
    Trane says it has a life expectancy of about 12 to 14 years
    Two companies were called in
    One replaced all the hand valves with packless valves ,then leak tested with nitrogen and a trace amount of refrigerant,

    It holds a vacuum for two days
    They put the lithium bromide back in

    Then in a couple of days
    it will not hold the vacuum .


    Where else can these leak
    Trane claims that the tubes are good and if the leak was in
    the water tubes the vessel will fill up.

  2. #2
    Join Date
    Aug 2000
    Location
    USA
    Posts
    4,986
    High temp gen leaking when the machine heats up? I test them with the liBr in the machine with an R22 and nitro backer to about 5 to 7 psig. Run your pumps with the burner off and start looking for wet spots or your leak detector going off. No need to be dancing with pulling the charge and putting it back in, waste of time IMO. Is this a Kawasaki/Thermochill, a classic 2 stage/horizon, or a horizon machine. Model would help. JMHO

    I've had pump motor leaks, weld leak, leaks in the steel, rupture disc, burner tubes, etc. Could be anyplace. Which rupture disc does the machine have? Iconel or Carbon Disc?
    Your poor planning does not constitute an emergency on my part!!!!

  3. #3
    Join Date
    Jul 2003
    Location
    Central New Jersey
    Posts
    108

    Arrow

    this can be a very tough machine to leak test/repair. dry nitrogen and R22 as a trace gas. best of luck to you
    Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world... AE

  4. #4
    Join Date
    May 2008
    Location
    Southern California
    Posts
    55
    Are you sure it is a leak and not hydrogen formation?

    Mike

  5. #5
    Join Date
    Jul 2002
    Location
    NorthEast
    Posts
    811
    Trane Model 3ABDL 450
    The gas fired generator ,on the side of the unit,was replaced about a year ago

    The vacuum pump has been on for two days and still did not drop below 22 Inches

  6. #6
    Join Date
    Aug 2000
    Location
    USA
    Posts
    4,986
    Sounds like you got got a serious leak. Follow my instructions above.
    Your poor planning does not constitute an emergency on my part!!!!

  7. #7
    Join Date
    Jan 2008
    Location
    windy city
    Posts
    4,423
    tite as a fiddle by someone else, & now only 22'' attainable? that's not a leak, thar's a hole in thar somewheres. you mite be able to hear it when pressurized

  8. #8
    Join Date
    Feb 2008
    Location
    Second City, USA
    Posts
    61

    YOU gotta leak test!

    99% chance your problem is one of two. Your pump crapped out or you got a leak. No where is it written that a newleak can't occur within seconds of a contractor fleeing the jobsite.

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