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  1. #1
    Join Date
    May 2006
    Posts
    654

    GeoThermal Heat Pumps

    Hello,

    We are looking into 5 Geothermal heat pumps. Do most commerial units come with controls and are they BACnet or Lon.

    Thanks

  2. #2
    Join Date
    Dec 2004
    Location
    San Francisco Bay Area
    Posts
    467
    I've done a couple different geothermal heatpump projects, and in each case, they all had low voltage controls (thermostat terminals), to which we applied our own DDC controllers.

  3. #3
    Join Date
    Mar 2008
    Posts
    86
    I am commissioning a job next week with 29 heat pumps, they are not geothermal, and I have control of a cooling tower and boiler. Anyway I am using the Viconics HP stat. (Lon)

  4. #4
    Join Date
    Mar 2008
    Location
    Tennessee
    Posts
    128
    probably will be brand specific the big manufacturers like trane or carrier will give you the option of factory mounted controls which will probably be a lon controller or a 24v interface to use somebody elses controls or just a themostat.

  5. #5
    Join Date
    Jul 2005
    Location
    Pittsburgh, PA
    Posts
    258
    We have a couple of projects with Geothermal heat pumps, the PA Historical Commission loves these things. They have worked well in some cases and marginally in others, it all depends on well locations. They actually had problems with the wells warming in one case. The units came as previously mentioned, just 24V controls and you retrofit whatever you want. We have ALC on one job and JCI interfaced to ALC thru Modbus in the other.
    HotRod


    Controls..some days your a hero, some days your a zero. Direct acting since 1992.

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