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Buderus GB

dconnors
dconnors Member Posts: 215
in THE MAIN WALL
Ask Buderus what the combined pressure drop is for your application. The GB has significant pressure drop. Probably why we make circulator selections that seem oversized.

Comments

  • Mark_7
    Mark_7 Member Posts: 123
    Buderus GB

    Anybody install a GB with a Amtrol WH-7 yet? Is there going to be a short cycle problem with the bioler or will the circulator over come that problem with the high head?
  • Mark Hunt_2
    Mark Hunt_2 Member Posts: 80
    Which circulator?


    Mark H

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  • Mark_7
    Mark_7 Member Posts: 123
    Buderus GB

    We were going to use a 0012 circulator.
  • dconnors
    dconnors Member Posts: 215
    All depends on what is controlling the circulator

    Works fine with our tank of similar size. But we do have a larger coil diameter i believe.
  • Joe Mattiello
    Joe Mattiello Member Posts: 732
    Try Taco 007-F5-IFC

    The WH-7 has 41 gpm capacity, and If I'm not mistaken the flow rate required is approximately 8 gpm. The 0012 is a monster for this application, and may cause velocity issues. The 007-F5-IFC will deliver the flow rate required to satisfy the WH-7 flow requirement for optimum efficiency, and recovery rate. The 007-F5-IFC has an integral flow check, providing less resistance in the system, giving more performance from the pump. Additionally, you will save money on an external check valve, and labor in stalling it. For your reference I have attached the submittal data information on the Taco, 007, and a catalog on the WH-7 I had on file. I have they same set up in my home, and I never run out of hot water. Also consider using a Mixing valve.

    Taco, Inc.
    Joe Mattiello
    Technical Service Technician
    joemat@taco-hvac.com
    401-942-8000 X 484
    www.taco-hvac.com
    Joe Mattiello
    N. E. Regional Manger, Commercial Products
    Taco Comfort Solutions
  • dconnors
    dconnors Member Posts: 215
    And Joe.....

    What is the pressure drop on the GB? You might want to consider that before making a circ selection.
  • Jed_2
    Jed_2 Member Posts: 781
    That's the question

    Can't find any info on the ^P of the GB HX anywhere. What is the recommended Primary circulator. Also, why the suggested parallel piping for DHW off the primary circuit? Duelling Circs? Just wondering.

    Jed
  • Rich Corcoran_20
    Rich Corcoran_20 Member Posts: 1
    The GB 142

    comes with a pre-piped promary boiler pump, a Grundfos SuoerBrute (UPS 15-58FC). The 0012 is going to be alot of circulator for the application, I's suggest another SuperBrute. 3speeds, integrated check valve (with no real impact on pump performance).

    If you look at the tech. data at Amtrol's website, you'll need 10 ft of head at 10 gpm (assuming you're going to use the full input of the GB). That's dead nuts on the curve for a UPS 15-58FC on hi speed.

    I've attached the SuperBrute literature for yur reference.
  • Mark Hunt_2
    Mark Hunt_2 Member Posts: 80
    Rich nailed it


    0012 is good if you want the Amtrol to orbit the earth, but in this application you do not need it.

    Better idea..........ditch the Amtrol and install a better indirect. Buderus makes a really nice unit as does Triangle Tube. There is life after Amtrol...........I promise.

    Mark H

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
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