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Posted by Bob D. on January 22, 2010 at 13:52:36:
In Reply to: Cleaver Brooks CB-LE High Water posted by Mark on January 20, 2010 at 15:33:52:
I think your on the right track with your thinking. Assuming the trap you mention is a tap on the water column (or off the equalizing leg/Hartford) then yes, it's called a "spill trap" and should probably be a F&T trap set just above the max operating water level and below the LWCO and ALWCO. On a new install, this is usually provided by the installing Contractor, and it's pretty easy to get it's elevation just a hair off. Slowly rising water level in the standby unit can be caused by steam from the main header condensing in the (slightly) cooler standly unit (just about all stop & non-returns will allow a little leak back), less-than-great seating of the feed water valve, or checks, or other little PIA things. If its just started happening out of the blue, maybe the trap needs cleaned or replaced.
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