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Author Topic: Grundfos UPS Pump specfications  (Read 3424 times)

tacoma

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Grundfos UPS Pump specfications
« on: November 27, 2014, 06:14:41 PM »
  I'm building a OWF and currently gathering the pieces.  My boiler will be located 50 feet from dwelling and at the same level.  I purchased a Grundfos pump and upon reading the owners manual it says that a minimum inlet pressure is required for operation.  Or place the pump lower than the boiler. Best I can do is place the pump just below the water level, which is around 3 feet.  Other than raising the boiler to get pressure I see no other way this will work. Or maybe I'm misunderstanding or maybe I just need to buy a different pump?
    By the way if it matters I was planning on an open system but can still do a closed loop.   Any info on this would be much appreciated.


  Grundfos UPS15-58FC
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AirForcePOL

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Re: Grundfos UPS Pump specfications
« Reply #1 on: November 27, 2014, 08:53:27 PM »
It will be fine how you have it.  I'm not sure on the required inlet pressure requirement though.  I have the same pump.  I actually just replaced mine with a badger pump and have my 15-58 as a backup. 
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RSI

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Re: Grundfos UPS Pump specfications
« Reply #2 on: November 27, 2014, 09:51:48 PM »
As long as the operating GPM can flow to the inlet of the pump you are good. If it can't, the pump will have to pull the water which it is not designed to do.
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LittleJohn

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Re: Grundfos UPS Pump specfications
« Reply #3 on: December 03, 2014, 06:50:08 AM »
I think they (Grundfos) are just trying to say that you need limit the possibilty of air collecting in the pump.  BUT WHAT DO I KNOW

Which pump did you go with TACOMA??  Just wondering, cause my dad has a similar size run between OWB and detached shop & he runs a SS Alpha (in constant pressure mode), with pretty good luck
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