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Thread: Approach Method

  1. #1
    Join Date
    May 2005
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    I have never heard of the approach method of charging a system intill the other day, i may no how to do it this way just under a differant name. can someone please explain the approach method to me. or was this service tech pulling my leg. it all started when i ask him how much his company was charging for a pound of r-22 and he told me it depended on if they used the approach method or not.

  2. #2
    Join Date
    Mar 2003
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    charging by the pound would have no bearing on using any method. but approach method is using liquid line temp minus
    ambient temp.

  3. #3
    Join Date
    Aug 2004
    North Richland Hills, Texas
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    Lennox is a big fan of the approach method for systems with a TXV.
    The only other manufacturer I have seen reference it is when setting up Trane low ambient controls.

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