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  1. #14
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    Apr 2003
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    St. Louis
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    Could you run the lines in a mini split line set cover?

  2. #15
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    Aug 2002
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    Southold, NY
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    Quote Originally Posted by servicefitter View Post
    Could you run the lines in a mini split line set cover?
    PVC Is cheaper

  3. #16
    Join Date
    Jan 2010
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    I can't say I've ever seen someone move there condenser into the backyard especially 35 feet. Is the power going in the same pipe ?
    Moving to the side of the house isn't a option ?

  4. #17
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    Nov 2006
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    Southeastern Pa
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    Quote Originally Posted by armandomartinez View Post
    I agree.
    But
    Homeowner is adamant about moving condenser away from his back sliding door. The complaints are that the unit is too noisy and gets in the way of his free area. I advised to consider getting a new unit since this one he has is 20 some years old. I also informed him about the new quieter units that he might consider. He still wants to move the unit.
    Reading the TRANE recommendations the 35 feet that is being asked by the HO will exceed the 15 recommend by TRANE.
    Going above ground, 35 feet away, way into the backyard doesn't seem like a good idea at this point.
    But l....what's a fella to do?!!

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    What's a fella to do? You tell him that Trane has a limit for the amount of lineset that can be underground.
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  6. #18
    Join Date
    Jun 2012
    Location
    Northern NV
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    Yup, it'll work, but pump down is a must or you WILL slug the compressor.

    Might consider pulling the lineset through perforated drain and foam it solidthrough the drain holes. Then lay in the trench and cover? If the copper is wet, it will suffer electrolysis and rot out.

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  8. #19
    Join Date
    Apr 2003
    Location
    St. Louis
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    All condensing units have a maximum line lenght. It's not because of loss of capacity it's how much oil the compressor will hold. In the manual after 35' they what you to add x amount of oil per foot. Since the compressors have gotten physically smaller so has their sump and at some point all the oil will return to the compressor then compressor failure.

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  10. #20
    Join Date
    Feb 2014
    Location
    Fontana, Ca
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    Thread Starter
    Quote Originally Posted by servicefitter View Post
    All condensing units have a maximum line lenght. It's not because of loss of capacity it's how much oil the compressor will hold. In the manual after 35' they what you to add x amount of oil per foot. Since the compressors have gotten physically smaller so has their sump and at some point all the oil will return to the compressor then compressor failure.


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  11. #21
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    Jan 2010
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    Quote Originally Posted by servicefitter View Post
    All condensing units have a maximum line lenght. It's not because of loss of capacity it's how much oil the compressor will hold. In the manual after 35' they what you to add x amount of oil per foot. Since the compressors have gotten physically smaller so has their sump and at some point all the oil will return to the compressor then compressor failure.
    👍

  12. #22
    Join Date
    Jun 2014
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    What is the reason for insulation on the liquid line below ground. If the copper is buried under 12 inches of dirt what are you still insulating it from. Honest question. I would never bury a line set here. Be afraid of frost heave damaging it.

    Is roof mounting an option?

  13. #23
    Join Date
    Aug 2002
    Location
    Southold, NY
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    Quote Originally Posted by dnr View Post
    What is the reason for insulation on the liquid line below ground. If the copper is buried under 12 inches of dirt what are you still insulating it from. Honest question. I would never bury a line set here. Be afraid of frost heave damaging it.

    Is roof mounting an option?
    Temperature. Underground being 55*f. Flash gas.

  14. #24
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    Feb 2004
    Location
    New Mexico
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    I've used both PVC and corrugated drain pipe. PVC is a huge pain. On a Gov job, a 6" schedule 80 ( ya, 80) sleeve was required through a concrete wall. Glad I caught that before the pour.
    Realize that running underground, your creating a very long oil trap. A velocity reduction and colder piping won't help. I've seen equipment fail because of oil loss.
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  15. #25
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    Jan 2004
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    Quote Originally Posted by servicefitter View Post
    All condensing units have a maximum line lenght. It's not because of loss of capacity it's how much oil the compressor will hold. In the manual after 35' they what you to add x amount of oil per foot. Since the compressors have gotten physically smaller so has their sump and at some point all the oil will return to the compressor then compressor failure.
    The line set has to slant toward the condenser. So the oil in the vapor line is always traveling toward it.
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  16. #26
    Join Date
    Feb 2004
    Location
    Madison, WI
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    Probably try to keep it sloped in a way that all water from rain or condensation can find a way out. I found a buried lineset in pvc that was completely water logged and the lineset had degraded and leaked. Water actually then went into the lineset after the charge was completely lost...needless to say the unit was toast.

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