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Posted by newboiler on December 07, 2009 at 18:40:51:
I am replacing my old boiler (with internal domestic coil) with a Weil McClain Ultra Oil OU-3 and Ultra Plus 40 Indirect Water Heater. My house is small and I only have 1 heating zone. The Old system has 1 circulator. Will I need 3 circulators with the new system: Boiler, Water Heater and Heating Zone? Does anyone have a piping and wiring schematic?
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