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Posted by Geo on November 25, 2004 at 03:57:43:
Our company recently installed a Weil-McLain sectional boiler. It's around 500,000 BTU. What is happening is that the boiler starts to build steam and the water level drops, cutting off the boiler and then filling. It has a M-M 47-2 feeder/low water cut off. I have repeatedly cleaned/skimmed the water, checked the height of the header, hardford loop is ok, lowered pressure control to 1 PSI and still it keeps cutting out and filling. What ultimately happens is the boiler will be overfilled on shutdown when all the condensate returns. Had the boys from WM out and they say the chest cavity does not hold enough water and a condensate tank is needed. My thought is that when I closed off the header valve the same thing occured even though The steam had no where to go. Up come the steam, down goes the water.What's up? Can't sleep at night thinking about this one.
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