Posted by Roger on June 20, 2000 at 04:53:20:
In Reply to: Faulty low water cut-outs, would be my guess. posted by MikeH on June 20, 2000 at 01:27:43:
I also agree with Mike but recommend that the boiler operator test the LWCO by blowing the boiler down until the burner is shut off by the LWCO. In NC as in most states or other jurisdictions it is required that the auxillary LWCO be equipped with a manual reset to be pushed before the burner can relight.
A lot of people don't realize that there is an expansion rate of 1700 times when water goes to steam . This is what causes the injection of water into a red hot boiler that has resulted from the burner not shutting down from the low water condition. The explosion that results can be extreme with some cases total demolition of the boilerroom and other structure in front and behind the boiler.