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Downward deepend of collector
in Solar
I think that is the name Caleffi calls the capped end on the down sloped solar collector manifold. In a drain back situation what do you do with the potential freeze area.
Jeffrey
Jeffrey
Jeffrey Campbell
0
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Comments
Opps
Jeffrey
Opps
Jeffrey
You can plug it with a silicone test plug...
Kevin
Do you have an example of the the product. How do you seal the plug..with RTV sealant? Is the silicone able to handle the high temps?
Just how my brain works.
Thanks
Jeffrey
by using a short piece of 3/4 copper with a cap on it. The cap was a snug fit inside the 1" copper header. I shoved it in to the first riser and soldered it. Then capped the end of the collector header. With a good joint on the inner plug, you could leave the header pipe cap off as a safety, anti freeze feature. I suppose the inner plug could be inserted with red Hi-temp RTV. Make the nipple long enough to seat against the cap on the header.
Dale at Radiant Engineering invented a plug like a mini thermos bottle plug. Insert it inside and expand it. I don't know if he plans on marketing it?
Depending on how steep you pitch the collector, I'm not sure all that much fluid would lie in there between the end and first riser? I don't hear of the DB installers addressing this??
A nice drainback specific collector could solve this "deadend" dilemma
hr
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me
http://www.plumbingsupply.com/testing.html
this link shows a photo of an expansion plug. I had to track down silicone "bar stock" and drill a hole in it for the bolt.
Silicone is the only elastomer that can handle the high temps at stagnation (which you can't avoid with controls or anything else.)