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Posted by Tom Stanton on February 21, 2002 at 09:49:46:
In Reply to: URGENT! Low-Low Water Cut Off set. posted by BoilingMan on February 21, 2002 at 06:50:21:
As per the ASME Section 1 Code, the lowest visible reading in a gage glass must be 2 inches above the lowest permissible water level as determined by the manufacturer, or in the case of horizontally set boilers, the lowest visble reading in the gage glass shall be 3 inches above the highest point of the tubes, flues or crown sheets. Therefore, if I were you, I would make sure the secondary LWCO is set so the water level never drops out of sight before the LWCO functions. I will check out the ASME CSD-1 Code and if I find any additional information I'll pass it along.
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