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What would cause this?
A pressure relief valve that is opening and closing could sound like that.
Bob "hot rod" Rohr
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me
Should be water traces from the relief valve popping if that is the case. I see the pipes shaking in the background in the video of the water heaters in question.
AO Smith Cyclone, bad misfiring combustion....maybe water in the burner compartment....poor venting/combustion air set up.
I have had this happen, wish I had never seen/installed that heater. Over sensitive to anything slightly out of parameter.
hmmm, I have been asked to install a cyclone (would be my first) for a hotel. It is one of 5, the existing venting is questionable. Maybe I'll pass on this job.....they already bought the water heater anyways, and I have months of work to get caught up on as it is......don't need a callback nightmare.
Almost sounds like steam flashing against condensate and tripping the relief valve. I wonder what the temperature settings were when this happened?
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