Outdoor Wood Furnace Info
All-Purpose OWF Discussions => Plumbing => Topic started by: dhymers on October 28, 2015, 10:40:02 AM
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My pump from my OWB gave up the ghost a few nights ago and I had a spare on kicking around to keep me going for the time being.
The pump was a Grundfos UPS 26-99 that died and I am not positive if this size of pump is needed or not. Originally the OWB was installed with a pool heat exchanger which I changed last year and now have a 50 plate between my OWB and the boiler in the basement. The OWB is just over 50' from the house. The spare one I am using now is a 15-58 which seems to be working efficiently, mind you it hasn't been cold out yet so I am not sure if it is truely big enough when the need arises.
Any recommendations is greatly appreciated.
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What speed were you running the 26-99 on?
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Was running it on 2 speed.
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I am in the same boat I switched to a 26-99 from a 15-58 and yet to see a difference because of outside temp. I also have a 50 plate exchanger and I have trouble getting to above 72 degrees in my house when its real cold out so I'm hoping the bigger pump helps. I'm running my 26-99 on 2 also
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I would just watch return temps. If you notice the return a lot colder than it used to be then go back to a 26-99. Usually a 15-58 is good with around 50' each way.
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Thank for the info, I will leave this one on for now and keep an eye on the temps as the weather starts getting colder. The 26-99 are a stock pump so I can swap it pretty quick if needed:)