Purging air from DIY coil solar pool collectors

skeeter_caMarch 26, 2013

I am building a DIY solar pool heater. The system uses 8 coil(irrigation tubing) type collectors.They are being mounted on a stand about 20ft from the pool and about 5 feet higher than the pool. Since it only has a 5 foot rise i wasn't thinking off using in an air break.

I am having two design questions. Should i have the exit on the collectors at the top so air will purge out of the top? I have seen both top and bottom exit with no problems mentioned. And second, how does the return header purge any air out of it?

skeeter

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golfgeek

skeeter ca,
Pool solar water enters at the bottom and exits at the top. The theory is to push the water up thru the panel(coil) slowly to transfer the heat.
Both lines should have ball valves for service and a hose bib or other device for draining the system in case you're in an area that might freeze.
It's common for these systems to purge air out the return lines each time they start. Good luck.

    Bookmark   March 26, 2013 at 12:18PM
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