Evacuation Levels Prior To Refrigerant Charge
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  1. #1
    Join Date
    Feb 2005
    Posts
    4
    Any air conditioner manufacturing engineers out there? What micron level do you evacuate your units to prior to refrigerant charge in order to "boil off" the moisture? We've polled many of our clients and would like to broaden the scope of our research for our VacuCharge system:

    http://www.ecicomplete.com/vacucharge.html

    So far it appears that the average is 200-400 microns.

    eciguy
    http://www.ecicomplete.com

  2. #2
    Join Date
    Feb 2004
    Location
    chicago suburbs
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    4,422
    500
    FILL OUT YOUR PROFILE!!

  3. #3
    Join Date
    Sep 2004
    Posts
    5
    200 microns is good,but most units on r22 will do well at 400 microns of vacuumn pull.r22 doesnt like moisture,the lower the better.sometimes its hard to reach 200.
    rifle

  4. #4
    Join Date
    Sep 2002
    Location
    South Dakota
    Posts
    6,579

    I am an instructor for a major manufacturer of HVAC equipment. We require that you reach a 500 micron standing vacuum and use an electronic vacuum gage to prove it.

    This is also the EPAs recommendation. As far as I know all manufacturers hold to this standard.

    Norm

  5. #5
    Join Date
    Jan 2005
    Posts
    86
    Originally posted by NormChris

    I am an instructor for a major manufacturer of HVAC equipment. We require that you reach a 500 micron standing vacuum and use an electronic vacuum gage to prove it.

    This is also the EPAs recommendation. As far as I know all manufacturers hold to this standard.

    Norm
    Since moisture has to be removed from the "pores" of the piping,and that takes time, for how long do you maintain the 500 micron vacuum before you say that things are ok?

  6. #6
    Join Date
    Feb 2005
    Posts
    1,475
    If it holds at that point for 10 minutes without rising then there is no more water boiling off, this is a very very low vacuum. About 1/50th of one inch

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