I'm installing a new Grundfos SQE pump system at my home. I've installed several pumps and controls previously, but that's basically my hillbilly plumbing and no problem, this thing is very high tech so I have a simple and maybe dumb question. The system is 220v. The wiring diagram shows the power hookup to the two terminals as power and neutral and one to PE (protected earth). Now if I hook up power and neutral I'll only get 120v of course, so I'm assuming the power terminals must be for the two power legs. Is this so? The PE is for ground, yes? This things too expensive to make a blunder and fry it. Thanks.