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Exploding Sight Glass leads to other issues
Call from hospital boiler operator this AM, said sight glass blew apart, was spewing water like a fountain and the boiler had shut down.
Feed pump continued to operate to maintain level. This may have been leaking for maybe 2 hours before morning operator arrived. They switched over to alternate boiler. As they replaced the sight glass they noticed that the top glass valve had been off. 80 HP boiler runs 5 to 8 PSI. Any idea of what blew the glass in this scenario?
Operator said "flame failure" light was on as he shut off the leaking boiler.
Water got into the control box thru a top Flex KO fitting. By the time I got to the site the little water in the control box had dried up.....108 degrees in the boiler room dries everything pretty fast. The boiler fired off fine at that time.
I shut it down and pulled the HW RM7840 control module and found water spotting on the top and bottom of the device. I told operator we should replace the control even though it appeared to operate fine once it dried out.
Of course there is reluctance to do this on his part as this was just converted from the old R4140G 6 months ago.
I placed the module in his hands.
My logic is that it shut down on false flame failure (thankfully) because it got wet.....and it could perhaps not shut down on an actual flame failure in the future.
The parts supplier in Chicago says we could send it in as water damaged, they would check internally and possibly remove any residue, if so return it with a record of repair. Only maybe a 10% chance of success.
I know any controls that get submerged should be changed. This only got dripped on but enough to cause the flame failure. Any ideas or advice. Thanks