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Posted by Dave on May 25, 2006 at 13:18:30:
In Reply to: Re: copper tube boiler groaning/vibrating posted by HeatPro on May 24, 2006 at 22:27:04:
The needle on the inlet gauge does not vibrate when the pump is on but the burner is off. As soon as the burner fires, the needle actually vibrates audibly.I'm guessing that that means there is some crud buildup in the hx.
The boiler/ergomax primary loop holds probably about 75 gallons of the total 90 gallons (15 gallons are in 3 air handler zones and 1 small radiant loop).
What do you think about my draining the glycol/water mix from the primary loop only and then running a TSP/water solution through the primary loop for a while.
Then drain/flush with water and refill primary loop with glycol:water. This would allow me to clean HX and save me the huge job of draining the long loops with the air handlers. But at the same time I would be replacing most of the solution, thus diluting out most contaminants that may or may not be present.