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I've been using Wilo for a while now for my zone valves mod con jobs. It works very well. However the set up on it is a bit involved. I was told to come by on a cold day turn on all the zones and tweek the adjustments until I get a delta tee to my liking. In most cases 20 degrees. After that it should be self adjusting. Perhaps I'm being picky but, what if it's installed in the Summer? What if going back is not convenient? How long will it take to really smooth out to a fair representation of the correct delta tee? Time is money. In short, final adjustment to fine tuning is a PITA. I've not used the Alpha yet but the sales line of automatic adjustment is attractive. Not lost on me is the lack of any description on the Grundfos web site as to the parameters of the automatic adjustment. Perhaps I've not looked in the right place, but claims of magic adjustment by the push of a button smacks of a slick haired salesman hiding behind his sun glasses , saying "trust me, it works great," and then flashing me a stainless steel smile. I like the display feature that lets you know the watts/gpm being used real time. Does the Grundfos have the self protection mode that slows the circ down to stopping if all the zone valves are closed but the pump is turned on? I like that Wilo feature. I could use that to turn on the circ by outside temp on a TRV rad system. I want to know how the Alpha "self adjusts." Trust me.
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