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Posted by Jeff on November 22, 2007 at 11:50:30:
In Reply to: Re: Laars/Endurance Relief Valve Leak posted by HeatPro on November 22, 2007 at 10:44:19:
Hmm, you got me thinking. If the factor set pressure is 12PSI, and we let water into it as the cold water into the expansion tank as the feed is at 15PSI. The water is taking up room already.
So the solution (instead of a bigger tank) is pump up the pressure of the expansion tank so that no water goes into it with the cold fill. So it has additional room for water to expand when the boiler turns on.
Does that make sense HeatPro?
: : 1) The section says that the MANUFACTURER says to close it. Take your pick as to who to listen to.
: : 2) In both cases, yours and John's below, a system gong over 25 psig is due to having an expansion tank smaller than necessary. As in this site:
: you can add another expansion tank or a larger one to the system to prevent it.
: John below is disappointed because he demands answers that fit his preconceived notions.
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