South Carolina Technician's Training/Ability

Discussion in 'Maintenance and Troubleshooting' started by Jim O., Jul 30, 2016.

  1. Mark Custis

    Mark Custis Not soon. Industry Professional Forum Leader

    Sorry I know better. I do not comment on workmanship I have not seen or been active in.

    I would have been there in a heart beat if I could still walk.
  2. Jim O.

    Jim O. New Member

    Installation completed and both systems have runtime in both cool and heat modes. Pleased with the air distribution between the three zones and, as of now, are pleased with the low level of noise at the supply air discharge grills. Curious about "cycle count" in the "history" screen - included a screen shot of that display on the Trane 950 - do you see any abnormalities? Thanks in advance for your comments. image.jpeg
  3. mrrxtech

    mrrxtech Member

    My Brother has a new Unit with the history screen. He can keep track of Start cycles and how many hours his Geothermal Runs as shown on your screen. He has the Inverter powered Variable Speed Compressor so he doesn't need the 2nd Stage from Y2 as you have on the 2 Stage Trane Geothermal Units.

    If you divide the Cycles into the Run Time hours you can get an idea of how long the Geothermal Unit runs to maintain the house temperature. As the outside temperature drops the Run Time should increase which would be normal with a new unit. Over time you could compare a given outside temperature against run time and see performance trends.

    Today your unit ran an average of 13.5 minutes each time it started to keep your house warm. The Unit ran in the 2nd stage one time probably due to a thermostat increase by you. The 1st Stage is keeping the house warm. As the winter wears on the Units will run longer to maintain the house temperature. I've forgotten if you have a closed loop. If you have a closed loop, it will cool down as the winter wears on, and require the 2nd Stage to maintain house temperature at set point. Raising the thermostat by 2 to 3 degrees will make the 2nd Stage energize to minimize how long it takes to bring the house up to the new set point.

    I don't see a problem with your Unit's performance.
  4. engineer

    engineer Well-Known Member Industry Professional Forum Leader

    Looking at the month's worth of data 72.8 hours spread across 623 cycles works out to just 7 minutes of on time per cycle. That seems low and not conducive to good efficiency. Zoned systems can be expected to cycle more frequently since they service separate areas and thermostats. Still I would want to know if there weren't some adjustments that could be made to lengthen cycle time for efficiency and longevity.

    Trane 950 control has adjustments for both "control response rate" (how tight system holds setpoint) and "Cycle Rate" or cycles per hour.

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