How is 63F in, 70F out for loop temperature during cooling?

Discussion in 'Vertical and Horizontal Loops' started by Bruce, Apr 10, 2012.

  1. Bruce

    Bruce New Member

    The system is a 4.5 ton Water Furnace Envision that was brought on line last winter. I was supposed to have 4 x 200' vertical loops. A bit was broken in the drilling process so I ended up with 3 x 200', 1 x 140' and 1 x 100'. We had a spring cleaning / inspection today. The temperature of incoming water in the loop was 63F and outgoing was 70F while the unit was cooling. The system was cooling 74F air to 43F.

    Thanks for your advice.
  2. Calladrilling

    Calladrilling Member Industry Professional Forum Leader

    How were all the loops tied together?
    In series, or header?
  3. Palace GeoThermal

    Palace GeoThermal Well-Known Member Industry Professional Forum Leader

    The temps sound good for now, the true test will be at the end of August.
  4. Bruce

    Bruce New Member

    I believe a header was used.

    Thanks for the feedback.

    How expensive are the tools to check temperature on the loops? I would like to be able to check them myself.
  5. AMI Contracting

    AMI Contracting A nice Van Morrison song Industry Professional Forum Leader

    Probe type thermometers between insulation and loop if not inserted in P/T ports are less $50
  6. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    "The system was cooling 74F air to 43F."

    That's approaching double the standard cooling delta T on the airside. It is a recipe for sweating ducts and associated mold / mildew, inefficiency, and coil icing

    Nowhere near enough airflow, or a runaround bypass damper is stuck open.

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