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Do I need an aquastat for indirect water tank?
I just had an IBC boiler installed with an IBC indirect DHW tank. The tank came with a temperature probe that was wired into the boiler.
The way the system is run is that dhw plus 2 pumps for 2 zones are run from the boiler directly. the other 6 zones are run from a taco zone relay box.
Today, all of a sudden after talking with IBC tech support, my plumber said that the temp sensor is no good and i have to put in an aquastat for dhw. He did not have enough expertise to actually explain to me why this is necessary but he did say something about priority and /or safety.
before I blow $ on an aquastat, can someone explain to me why this is the case?
I thought that a temp probe is enough for the boiler to turn the dhw zone and and off as needed. I realize there may be a priority issue but I don't suspect it to be that large based on what i'm reading in the ibc manuals.
the boiler is a g3 20-160. the tank is a 65 gallon indirect IBC unit as well.