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Hot water heating control...? What is it?
DanBee
Member Posts: 3
I came across this during a site visit to replace a boiler. Residential Open hot water gravity system
the item pictured has Honeywell stamped on it
My guess is that it contains mercury in the bottom section and operates a check valve.
When the return water gets hot enough the mercury would rise and close. When the water would cool down, the mercury would drop and open the valve.
0
Comments
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That is the jist of it. Lot's of mercury, so be careful.
Dan has a better explanation in "Classic Hydronics""If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
Thanks for the Reply Zman. i remember seeing something similar years ago, I wasn't 100% on it. thanks for confirming.
DB0
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