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  1. #1

    Excessive distance to run refrigerant lines?

    We are in the process of installing two Trane 20 ton ac split system units and because of the layout of the property, we need to set the condenser units quite a distance away from the evaporators/air handlers. The manufacturer recommends no more than 60 feet between but it looks like the closest we can get them is 100 feet on one and 115 feet on the second.

    My question is: Can this distance be achieved without overloading the compressor? And if so, how is the best way to do so? The size of the refrigerant line is 1 1/8" copper. Is this accomplished by increasing the diameter of these lines?

    Thanking you in advance.

  2. #2
    Join Date
    Jun 2009
    Location
    Albuquerque NM
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    2,485
    Most manufacturers have guidelines for long linesets, and yes they may include increasing the size of the vapor line.

    The line size can be increased, but if there are any vertical segments you need to worry about velocity drop affecting oil return.

    http://www.uad.co.za/cd/pdf/technica...ion_piping.pdf

  3. #3
    Join Date
    May 2000
    Location
    Rochester, NY, USA
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    14,360
    have your TM call the factory. they will tell you what size and length you can go.

    I ran a 2 ton split---80feet total length. 20' horizontal, 22 feet vertically and another 38 feet horizontally.

    I called my local distributor, they called the factory. It's been running for a little over 6 years now with no issues

    Let the engineers do there job, if something goes wrong, it's on them
    LOVE has four letters

    So does BEER, DEER,GUNS AND FISH

  4. #4
    Join Date
    Jun 2009
    Location
    Albuquerque NM
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    2,485
    Quote Originally Posted by jmac00 View Post
    have your TM call the factory. they will tell you what size and length you can go.

    I ran a 2 ton split---80feet total length. 20' horizontal, 22 feet vertically and another 38 feet horizontally.

    I called my local distributor, they called the factory. It's been running for a little over 6 years now with no issues

    Let the engineers do there job, if something goes wrong, it's on them
    Just curious, how did you slope the horizontal segments of the line?

  5. #5
    Join Date
    May 2000
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    Rochester, NY, USA
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    Quote Originally Posted by garya505 View Post
    Just curious, how did you slope the horizontal segments of the line?
    I didn't. I asked about slope and P-traps and they (the factory engineers)said don't bother? it will be fine.
    LOVE has four letters

    So does BEER, DEER,GUNS AND FISH

  6. #6
    Join Date
    Jun 2009
    Location
    Albuquerque NM
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    Quote Originally Posted by jmac00 View Post
    I didn't. I asked about slope and P-traps and they (the factory engineers)said don't bother? it will be fine.
    I kinda thought you might say that, but I like to ask anyway.

  7. #7
    Join Date
    May 2000
    Location
    Rochester, NY, USA
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    Quote Originally Posted by garya505 View Post
    I kinda thought you might say that, but I like to ask anyway.
    good luck, give them guys a call, they're not the mean ogres everyone makes them out to be (unless you get that arrogant )
    LOVE has four letters

    So does BEER, DEER,GUNS AND FISH

  8. #8
    Join Date
    Mar 2011
    Location
    Louisiana
    Posts
    119
    Usually not a huge problem, as long as you're not planning on running them underground.

    J

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