Iowa Bosch DIP Switches

Discussion in 'Maintenance and Troubleshooting' started by CommanderDave, Jan 27, 2020.

  1. CommanderDave

    CommanderDave New Member

    Hi. I recently had a Bosch 3 ton (SM036) geothermal unit installed. The setup is open loop "pump and dump". I'm finding that my installer was not much of an expert in open loop systems and I've had to correct some of his mistakes. I am not sure that he set the DIP switches correctly for open loop, as well as setting the right CFM which I understand should be at 1800 for a 3ton unit. Any information on the correct DIP/CFM settings would be appreciated. Thanks.
  2. SShaw

    SShaw Active Member Forum Leader

    1800 CFM would not be right for a 3 ton. The typical range is 350-400 CFM per ton.

    Maybe you should first review the online manuals for the particular equipment you have. The recommended settings should be listed inside.

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