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[uncle]

Reading the previous post, I hope I got the right pump???

I have a run one way of 220' and a 30 plate heat exchanger.

What pump would you suggest?


I have a Grundos UPS15-58FC.

Brian

[Scott7m]

To small

[RSI]

What size pipe?

[Scott7m]

I was assuming he had 1" pex....  Maybe he'll be back

[uncle]

1" pex all the way.

Brian

[uncle]

I have a second pump for my second loop, a Bell and Crossett NPF22.

That loop it 55' of 1" with only a water to air exchanger.

What do you think of this one?

Brian

[RSI]

That one should be fine.
For the 220' run you could add another 15-58 in series or get something like a 26-99 or b&g pl36.

[uncle]

I might keep the 15-58 for a spare/emergency pump and get the pump you quoted.
Thanks,
Brian

[uncle]

I didn't mean to bring this back up but I need a little help.
My run to the house is 220ft one way of 1" pex. I have a 20x20 water to air hooked up. From the pump through the whole loop, there are 2 shark bite 90's total. I want to plumb in a 30 plate water to water and this will take a few more fittings.
What would be an estimate of my head and would the 26-99 still be a good pump?

I am using the 15-58 just to get heat moving but I want to do what I can to make it right.

Thanks,
Brian

[Scott7m]

Grundfos 26-96 would be better..  I often say 26-99 but mean 26-96.

[RSI]

What is the reason to use a 26-96 instead of a 26-99? That may be a little small for 220' each way? You can always use medium on the 26-99 it is a little big and it doesn't cost that much more..

[Scott7m]

What is the reason to use a 26-96 instead of a 26-99? That may be a little small for 220' each way? You can always use medium on the 26-99 it is a little big and it doesn't cost that much more..

Yea..  Your right, I was looking at the curves wrong

[slimjim]

What is the heat load like, I normally try to size circs with that in mind, is the 1 inch pex inside diameter or is it nominally sized, a good rule of thumb is 1 gallon of water per minute = 10,000 btu extracted at the heat exchanger, 10 gallons per minute = 100,000 btu output, on a long run like this, sometimes it helps to double up the circs, one on each end of the line.

[uncle]

It's just standard 1' PEX, the sharkbites work perfect.

Can we visit pump speed that you mentioned? How would I know if I needed to slow the pump or speed up the pump?

I've got the small pump on it now just to get heat moving but I have not connected the 30 plate yet.

Brian

[slimjim]

Speed up the pump or flow rate if the differential is over 20 degrees and slow it down if under a load you are less than 10 on the differential