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Posted by Ron on November 23, 2005 at 23:45:50:
In Reply to: Steam Boiler Flush posted by John on November 21, 2005 at 16:09:07:
If the new boiler has an electronic probe type low water cut-off you do not flush at all. The fresh water has oxygen that when released due to heating, causes internal corrosion. The second problem is carbon dioxide is released when heated and mixes with condensate if not vented and causes carbonic acid. Put as little fresh water into the systems as possible.
If the unit has a float type it requires flushing weekly or bi-weekly. Flush as little as possible until water runs clears up. Most manufactures are starting to put max water per month charts in the I & O manuals.
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