First 18 months with NO SAVINGS AT ALL

Discussion in 'Maintenance and Troubleshooting' started by captain, Feb 28, 2011.

  1. Looby

    Looby Member Forum Leader

    The electrical tag doesn't know anything about the waterside pumps
    or plumbing -- but it does have a contactor that turns the pump(s) on
    when the compressor is running. In this case, the contactor is rated
    at 5.4 amps, max (so that it can handle some open loop well pumps).

    There's no difference in pumping requirements between pressurized
    and non-pressurized closed-loop systems. The same circ pumps will
    work with either. However, non-pressurized systems are somewhat
    more susceptible to cavitation -- so, you have to pay closer attention
    to the pumps' minimum inlet pressure specs.
  2. ChrisJ

    ChrisJ Active Member Forum Leader

    I thought it was stating the system uses a 1/2 HP pump for the loop, seemed like a lot. Don't some open loops (well pumps) use 1/2 HP? The DSH says 1/40 HP which seems small, but from what I have read they are plumbed with 1/2" pipe.

    Just trying to think of reasons why no savings. Just high electric and low gas.
    Hotter summer, colder winter.

  3. Looby

    Looby Member Forum Leader

    Yes, 1/2 horsepower is common -- but it could easily be more for
    a deep well. In that case, I guess the installer would have to add
    a heavier-duty external contactor.

    The DSH (including circulator) is a factory-installed option for that
    unit -- so WF gets to choose the pump. The blower (in an NDV049)
    is also factory-installed, and thus under WF's control.

    The aux heat strips (if supplied by WF) are a field-installed internal
    option available in several sizes -- but still under WF's control.
    Last edited: Mar 21, 2011
  4. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    High electric and low gas are explainations in themselves.
    Expectations are the problem here. Someone who fully understood what to expect may not have selected geo due to a very distant pay back horizon.

Share This Page