New boiler system over-pressure


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Posted by Dale Van Aken on December 27, 1997 at 12:04:28:

I have a new 150,000 btu boiler with a 60 gal indirect fired hot water heater. Both heat and HW have their own circs. The system seems to regulate between
15-20 pounds for a few days, then blows the pressure relief valve (set at 30#). The water inlet control has been replaced and the expansion tank has been
replaced and upgraded to a Amtrol Model 60. All looked good for a few days, then 2 quarts of hot water on the floor. The installer is stumped. Me too. Any
of you boiler pro's seen this before? Thanks.



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