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    pre charges

    Hello I am new at this...but here goes I just installed a grundfos mq-45 booster pump. It is 1hp. It has a precharge tank built in of 25lbs. I have a 86 gal bladder type tank precharged at 38lbs from factory.I am drawing fro a adjacent cistern. My question is since the pump is factory set to...
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    pressure switch wiring please help

    Hello I am trying to figure out how to wire a grundfos pump to the pressure switch. I have a 220 circuit red black and white with ground. The grundfos has three black wires and a green/yellow wire {ground?] Can you tell me what wire goes where? I have a square -D pressure switch mounted . I...
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