Tetco AC50 Open loop to convert to Closed Loop

Discussion in 'General Discussions' started by ciws14, Aug 18, 2009.

  1. ciws14

    ciws14 Member

    I have recently gained a customer with an existing TETCO AC50 Geothermal open loop with a C36 Cooling Coil. She recently had to have her well re-drilled and the aquifer the well company tapped into has an insane amount of iron in the water. The company that serviced her equipment before me, installed a spun cotton water filter to help with the iron problem. She is having to change this every 2 weeks to keep the unit running. It has also been very unreliable in the winter for her as well. She recently decided she wants to go with a closed loop system and eliminate the open loop setup all together. The IOM manual on this unit only show an open loop type setup. Has anybody had any luck converting this unit to a closed loop? It seems the same water flow and Delta T would apply with the closed loop if properly sized. Any ideas or suggestions? Thanks!
     
  2. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    Closed loop generally recommended to be higher gpm per ton / lower delta T, but other than that, it oughta work - unit doesn't care where the water comes from and losing the iron would be a huge plus.
     
  3. Bergy

    Bergy Member Industry Professional Forum Leader

    Coil cleaning

    Has her coil been back-washed to remove deposits? Open loop systems need to be cleaned every two to three years.

    Bergy
     
  4. ciws14

    ciws14 Member

    I have backwashed it upon the first call she put into us. I will do another treatment before we close the loop up and charge the system. I was not sure if this being a ground water coil simply circulating ground water through a coil for cooling would be able to adapt to a closed loop setup.
     

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