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Posted by Dave on May 23, 2006 at 07:53:07:
In Reply to: Re: copper tube boiler groaning/vibrating posted by HeatPro on May 22, 2006 at 09:48:39:
Why would this problem happen now after 4 months? There have been many times where just the DHW is on because the system is set to priority for DHW. So even in the winter, when the call comes for DHW, the other zones shut off. So why now would we be getting this noise when all winter, even with just that small radiant floor loop running, we had almost complete silence?
Could foaming of the glycol cause a similar sound? What would cause that? I turned off the second stage burner this morning, and it still makes the sound as soon as the primary burner comes on....when it used to groan from flashing, the noise would not start until the water reached a certain temp.