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Indirect Coil Piping Rusted - Use It As A Storage Tank?
Got a call from the parents yesterday. Their 41 gallon BoilerMate was leaking all over the basement floor. I isolated the indirect and re-activated the tankless coil in their Utica boiler. (We left the coil and Taco mixing valve piped in. Really glad we left it. Just had to throw some valves and enable the low limit and they had hot water again.)
Drained the indirect and the coil zone and cut it out of the system. The return elbow on the bottom of the tank was rusted through, and snapped off inside the tank.
Would it be possible to use the indirect as a storage tank fed from the tankless coil? Maybe wire up a circulator between the coil outlet and the tank cold inlet triggered by the BoilerMate's aquastat to keep the tank at setpoint? I've got a Taco mixing valve that I can use on the outlet of the tank to temper the hot water supply.
Would this work?
Nick, Cranston, RI