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  1. #1
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    Nov 2011
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    Vacuuming in foggy and cold weather



    Hi all.

    Anyone has experience in vacuuming the cobber tubes in foggy and cold weather, or should one avoid such condition?

    Please share your experience.

    Regards

    M



  2. #2
    Join Date
    Sep 2007
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    Somerset
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    Re: Vacuuming in foggy and cold weather

    Sometimes you have no choice.
    But the lower the ambient and the wetter the atmosphere that any install may of been subjected to.
    The lower the vacuum needed to eradicate any moisture.
    Grizzly

  3. #3
    Join Date
    Dec 2008
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    UK
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    Re: Vacuuming in foggy and cold weather

    Purge the tubing with OFN and then carry out a triple evacuation, breaking the vacuum with OFN at each stage.
    Mobile A/C at its best, see avatar.

  4. #4
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    Sep 2003
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    Re: Vacuuming in foggy and cold weather

    You can also heat the system with hot water or even with a torch.

  5. #5
    Join Date
    Oct 2007
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    Re: Vacuuming in foggy and cold weather

    link the lp switch,compressor overheat stat and run the new system to push the moisture out-speeds up the vaccing process

  6. #6
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    Sep 2003
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    Re: Vacuuming in foggy and cold weather

    Quote Originally Posted by install monkey View Post
    link the lp switch,compressor overheat stat and run the new system to push the moisture out-speeds up the vaccing process
    That will require an experienced engineer or the compressor will burnout.

  7. #7
    Join Date
    Jun 2009
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    Lusk , Dublin
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    Re: Vacuuming in foggy and cold weather

    You will need a hat,scarf ,warm jacket and a pair of gloves.
    And a torch with a yellow lens.

    Cheers
    Stu
    Tool's ? check ! Condom's ? check !
    If you can't fix it , f*ck it !!!

  8. #8
    Join Date
    May 2007
    Location
    Scotland
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    Re: Vacuuming in foggy and cold weather

    Hello

    You should use a steam chart and read off the depth of vacuum for the ambient temperature at the coldest part of the system. You wont be able to pull a satisfactory vacuum if any pipework is below 0c.

    There's no need to pull such a deep vacuum in hot weather, its a waste oftime.

    Triple vac just speeds the process up, it wont increase the depth of the vacuum.

    Regards
    Last edited by Contactor; 03-01-2012 at 12:03 AM. Reason: .

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