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Posted by HeatPro on December 26, 2010 at 12:06:14:
In Reply to: Hot Water Problem Columbia Emerald EM-125 posted by Eric on December 25, 2010 at 19:41:04:
Replacing the boiler seems to be a standard response during service calls, as getting extra income from selling new equipment keeps a company going. The cause of the buzzing is most likely from the 008 circulator, as it is 'more powerful' than the old circulator, so draws the pressure down more to be able to create a boiling at a lower pressure. Increasing the temperature over 160F when that is created makes the water in the boiler more subject to boiling, so making the noise.
Some educated repiping repairs can get rid of the noise and allow the water to be set back up over 160F to create the needed shower temperature. The trick is to be able to get that education to a company that profits more from mistakes, which sales of new equipment supports the repair company, the supplier and the manufacturer. Thus, educating them at all means less profits in an era of shrinking economy. someone who could do so isn't welcome in a shark pool.
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