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  1. #1
    Join Date
    May 2005
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    I dont do A/C but……...

    I have a customer thats leaning on me to get his new A/C unit going, he and his son installed it and they want me to solder the ends and get it going..he said the condenser has enough freon (410) to do a 20' run, they increased it to 50'…….I borrowed the 410 and gauges from a plumber friend.

    What Im going to do is put the line set together, pull a vacuum on those lines and open the valves..

    what else do I need to be watchful of?

    This place in in the middle of nowhere, and theres no A/C guys around..and I do his restaurants refrigeration.

    thanks.
    Let's give nukes a chance.

  2. #2
    Join Date
    Sep 2013
    Location
    Atlanta, GA
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    AC is charged by sub cooling, typically in the 10-12F range for the standard stuff. If it's a new unit there should be a filter drier inside, but there are ones without driers in which case you should add one.

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  4. #3
    Join Date
    May 2010
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    Canada
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    Piston systems are charged by SuperHeat.
    Expansion Valve systems are charged by Subcooling.
    The install manual will tell you how much extra refrigerant is required for each foot beyond the 20'.
    The most common problems we see with installs are airflow/ductwork related.

    If you dont do much AC you might find this helpful
    http://www.trutechtools.com/RefrigerantCharging

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  6. #4
    Join Date
    Aug 2013
    Location
    Las Vegas, NV
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    Your plumber has 410a gauges?

  7. #5
    Join Date
    Feb 2004
    Location
    New Mexico
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    Are you licensed to handle refrigerant? You could hurt yourself. There are limits for what you do for friends.
    Give me a relay with big enough contacts, and I'll run the world!

    You can be anything you want......As long as you don't suck at it.

    If a person wants to create a machine that will be more likely to fail...Make it complicated.

    USAF 98 Bomb Wing 1960-66 SMW Lu49

  8. #6
    Join Date
    Apr 2003
    Location
    Maple Grove, MN
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    Quote Originally Posted by hvacker View Post
    Are you licensed to handle refrigerant? You could hurt yourself. There are limits for what you do for friends.
    Refrigerant jugs usually include their own handles and he didn't say this was for a friend. I'm pretty sure Primmers will be just fine.

  9. #7
    Join Date
    May 2005
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    Thread Starter
    Yes the plumbers around here do plumbing and heating which includes A/C..

    Amm yeah I know a little bit about freon…

    All went well, system is running great…
    I did this for a customer what has a restaurant..He and his son did the install, I assembled the line set, got it going..

    The plumber has me do his line sets as well..

    thanks everyone..
    Let's give nukes a chance.

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