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Posted by HeatPro on January 18, 2010 at 11:49:19:
In Reply to: Still Overpressure please help posted by joe on January 18, 2010 at 08:53:46:
You have a very large system with much water, so the EA-60 isn't large enough: Solution:
You have a tankless coil inside the boiler that is leaking slowly.
Repair or replace.
As the pumps are on the return, they add to the system pressure by the expansion tank, as they are not "pumping away" as recommended by boiler manufacturers since 1920.
OR a combination of the above.
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