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Posted by HeatPro on March 01, 2005 at 19:17:41:
In Reply to: boiler banging? posted by boconnell on March 01, 2005 at 19:02:46:
The most usual cause of banging is the design with 4 zones in a boiler without much water in it. When a few zones are closed, less than half the amount of water is flowing thorugh the boiler to cool it off, so it boils water inside. A design with enough zones open all the time to assure minimum flow, or a buffer tank to provide the water mass the little boiler is missing to absorb heat can stop that.
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