Pump running at night.... help newby

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  • ganner
    Junior Member
    • Feb 2013
    • 1

    #1

    Pump running at night.... help newby

    Hi All, I am at my whits end trying to sort this problem.

    We inherited a solar panel paradigma cpc 14 we bought this place, it is a very basic system or seems that to me, when after a while we were told to get the full benefit we needed to get a larger cylinder so we did, also we had the panel decommissioned last year so we could renew the roof tiles, plumber put it back up & since then it’s not been quite right. I can hear the pump running at night, to get over this for the time being I take out the bottom probe & warm it up on the hot water pipe so the temp comes up & stops the pump running.

    It all cools down until I did notice the temp on the collector going up when the hot water was being drawn at six o’clock at night HOW when it’s like 1 - 0°C outside the collector went up to 55°C, I can’t get my head around that!

    The system seems to run fine through the day, pump running, the pressure is running at 13bar, the controller is a deltasol bs all fitted in 2008, the original installers have gone bust, a local company wants £800 -£900 + vat I must have something wrote on my forehead, or is it that complicated?

    Many thanks for reading this & any help would be gratefully received.
  • Naptown
    Solar Fanatic
    • Feb 2011
    • 6880

    #2
    sounds to me like they have the sensor leads reversed or perhaps the controller is set for recirculation for freeze protection. check the programming on the controller and make sure the sensors are wired into the correct terminals.
    Check also if this is a direct or indirect system meaning is the tank water running through the collectors or is there a separate loop with antifreeze for the collector loop.
    A picture or several would help.
    NABCEP certified Technical Sales Professional

    [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

    [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

    [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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    • russ
      Solar Fanatic
      • Jul 2009
      • 10360

      #3
      Pump running at 13 bar? That is close to 200 psig - very high.
      [SIGPIC][/SIGPIC]

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