Anyone have any recommendations as to other products like the scala2? Thx Jay
> On Sep 17, 2020, at 10:07 AM, Ray <r...@solarray.com> wrote: > > > I've definitely had some Grundfos failures from the way back days, but their > Alpha ECM circulator series has been really solid, as well as Taco's ECM > drive circulators. To be clear ECM is variable speed drive VSD, but not > variable frequency drive VFD. ECM varies DC voltage to a DC motor to vary > speed, while VFD varies frequency to a 3 phase motor to vary speed. > > Or at least that's the way my feeble mind understands it...... > > Ray Walters > Remote Solar > 303 505-8760 > On 9/17/20 9:42 AM, Dave Angelini Offgrid Solar wrote: >> Look at the recent Grundfos Scala2 recall, they have sold some really bad >> pumps, so AC is not always best. For Offgrid a spare inverter is often >> called for because critical systems do need back-up. Many >> applications/requirements are different. >> >> Grundfos scala2 pump recall >> They have been recalling or "updating" all VFD type pumps for 30+ years now. >> It is all part of their planned obsolescence. The more electronics you have >> in a pump system, the less likely water is to come out of a faucet when >> opened, and the more it is going to cost you >> >> >> Winter is coming :) >> >> >> Dave Angelini Offgrid Solar >> "we go where powerlines don't" >> http://members.sti.net/offgridsolar/ >> e-mail offgridso...@sti.net >> text 209 813 0060 >> On Thu, 17 Sep 2020 09:30:43 -0600, Ray <r...@solarray.com> wrote: >> >>> Actually best of all: you don't have to run low voltage DC circuits to the >>> pump room. Another thing about the ECM drive pumps, they have much higher >>> flow rates available than the El Cids. And if you're worried about your >>> old school street cred in the off grid world, they are still technically DC >>> at the drive, for those old timers that insist on DC. >>> >>> Ray Walters >>> Remote Solar >>> 303 505-8760 >>> On 9/17/20 6:54 AM, Dana Orzel wrote: >>>> I have El-cids in stock & am selling them off. >>>> >>>> I have switched to the new AC technology that Grundfoss & TACO offer. They >>>> are called ECM pumps. Electronically Commutated Pump motors. AC-DC motors, >>>> soft start, variable speed, super-efficient, best of all very QUIET! >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> Dana Orzel Great Solar Works, Inc. >>>> >>>> C - 208.721.7003 d...@solarwork.com >>>> >>>> Idaho Contractor - # 028765 Idaho PV # 028374 >>>> >>>> NABCEP # 051112-136 www.solarwork.com >>>> >>>> "Responsible Technologies for Responsible People since 1988" >>>> >>>> P Please consider the environment before printing this email. >>>> >>>> >>>> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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