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  1. #1
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    Apr 2012
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    Long Line Geothermal Split Systems

    Have any of the various manufacturers published guidelines similar to Carrier's "Residential Piping and Long Line Guideline"?

    Many thanks for whatever info you can provide.

  2. #2
    Join Date
    Mar 2013
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    Treasure coast, FL
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    Quote Originally Posted by ferd1942 View Post
    Have any of the various manufacturers published guidelines similar to Carrier's "Residential Piping and Long Line Guideline"?

    Many thanks for whatever info you can provide.
    I would think you can use the same piping practices. You're still transferring heat from one place to another. Just keep in mind the piping has to work well in two directions in the case of a heat pump, which will take more thought.

    Sent from my SCH-I545 using Tapatalk

  3. Likes GT1980 liked this post
  4. #3
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    Apr 2012
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    Thread Starter
    Thanks.

    Carrier doesn't manufacture their geothermal heat pumps. It used to be Climate Master, as the last 18 months or so it's Bosch.

    From Bosch on the 14th: "We appreciate the consideration for our equipment however the heat pumps do not have consideration for long line beyond 75 feet (total equivalent) to include no more than 20’ vertical differential. We do not have a project planned to review long line extensions at this time. We have no accumulator in the heat pumps, no charge adjustment tables beyond the 75 feet, no recommendations for trapping above the 20 feet differential, etc. We will not approve applications beyond our recommended 75 feet total equivalent to include no more than 20 feet differential. We apologize for the inconvenience."

    From Bryant on the 14th: "If the installer chooses to disregard the limits of our recommendation, performance and reliability may be compromised. Bryant accepts no responsibility for product failure due to misapplication."

    At issue is three Bryant installations in a big home where the only places to put the cubes are outside the 75 feet EL.

    Any thoughts would be appreciated.

    Many thanks.

  5. #4
    Join Date
    Jan 2014
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    I would advise putting oil traps at the compressor and air handler. Also you need to keep in mind the velocities required to prevent oil separation and pooling in the lines or you will need to calc how much trapped oil the system will retain and make sure to add that when charging the systems.

    Looks like youve got some math homework.

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  7. #5
    Join Date
    Apr 2012
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    Millsboro, DE
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    Thread Starter
    Thanks!

    FCU above cube, contractor did install trap at FCU and follow Carrier LL Guidelines. They connected and started the two systems, had 30F ATR's with acceptable refrigerant pressures (don't know details). Distributor will support the installer, so I think we're good.

  8. #6
    Join Date
    Jun 2013
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    In over 80ft away but 16ft up, trap and a check valve, and a time-delay as the scroll did a de-pressurizing-rotation-reversal on some short millisecond "off" brownoutages, and was heard back-spinning in regular cycles off.
    Process cooling: NO COMPRESSORS Earth-Coupled since 1996
    ... however, much still needs to be hybridized energy transfer.

    CLOSED LOOP 2015 listed EER's
    even 49+ now; and "blended from low to high variable speeds" for 32deg.F ~ E-Star

    Perhaps you need a 32F Chiller/HW-Heat: buy a GEO-T Heat Pump (GHP with Heat-Recovery)
    http://www.energystar.gov/index.cfm?...mal_heat_pumps

    http://www.hydro-temp.com/products.html and Bosch/Carrier and AquasystemsInc.com

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