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Posted by HeatPro on October 19, 2005 at 20:21:52:
In Reply to: Mclain boiler not heating up past 155'F posted by Dino on October 19, 2005 at 20:02:03:
Yup, you are describing how a boiler works when it has to heat up LOTS of water, pipe, and cast iron radiators from a cold start. The best way to control this old converted gravity hot water system setup is to use an outdoor reset to keep the boiler and radiators at the temperature required according to the outside temperature while running the circulator 24/7. It fixes the problem.
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