“Jumpering” three control systems with individual control-power transformers through a single contact is very shortsighted—likely unreliable at very least—worse, unpredictably hazardous for boiler-operational safety.
It could very well be that the boilers are not shutting down by the subject thermoset, but instead being repeatedly cycled by safety-limit controls—which may be a very serious error.
[This message has been edited by Bjarney (edited 09-25-2004).]
