Cycle Stop Valves

Pump System Questions and Answers => Open Loop Geothermal Heat Pump => Topic started by: cvclub on February 25, 2018, 09:20:43 AM

Title: Open loop using discharge for lawn irrigation and possibly my home
Post by: cvclub on February 25, 2018, 09:20:43 AM

Thinking about a new build......I need the following: 1) 12 gpm max for geo 2) 60psi for house 3) 40psi 12gpm for lawn zones.  I like your 2 pump idea and since my well is shallow (50ft, static water at 20 feet) I might be able to get creative and use a small well pump and a 2nd jet pump for increased pressure for house and lawn? Any diagrams or suggestions would be appreciated.

FYI, I also thought perhaps I could 'tap' into my discharge line(s) to re-purpose some of that water? I had it tested and it's virgin quality!

Title: Re: Open loop using discharge for lawn irrigation and possibly my home
Post by: Cary Austin on February 25, 2018, 02:34:20 PM

The thread at the following link shows a diagram and gives an explanation of the two pump system, as well as using water from the discharge of the heat pump.
http://forum.cyclestopvalves.com/index.php?topic=2093.0

Title: Re: Open loop using discharge for lawn irrigation and possibly my home
Post by: cvclub on February 26, 2018, 10:25:27 AM

I was not sure how to use the discharge for both house and irrigation.........any thoughts?

Title: Re: Open loop using discharge for lawn irrigation and possibly my home
Post by: Cary Austin on February 28, 2018, 11:45:11 AM

You just tee off to the house after the heat ex-changer coil instead of before it.  The trick is having a pressure sustain type valve after the electric valve on the heat pump discharge.  This way when the heat pump is discharging it holds back 40-50 psi to the house instead of dumping it all.  I have not found too many options for this pressure sustain valve.  The one I use is a Cla-Val model CRL or 55F.  These are not cheap, but they work good and last a long time.  Cla-Val makes municipal grade stuff, so it is well built.