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Posted by HeatPro on December 02, 2007 at 13:52:44:
In Reply to: Re: Boiler making noise and become inefficient. Raypak Gas Boiler. posted by jdwilson on December 02, 2007 at 13:31:38:
even before the burners fire up it is making the noise.
: I'm not sure if this could still be a sign of poor flow. Maybe?
++ Maybe. The circulator sets a flow rate that can create a flow imbalance in some tubes more than others with a result like organ pipes in some. As it happens before the burners come on, you might have to readjust using the thermometer as indicated in the referenced page instructions.
The same result of lowered efficiency as heat passes by some tubes instead of being absorbed can happen as flow in one section is restricted by flow alone.