Hi Nathan, The SQ Flex will take AC or DC voltage. I suspect your issue is with the CU200 which have a lot of failures.
jay peltz power On Apr 6, 2011, at 4:48 PM, Nathan Jones wrote: > Allan, > I seem to recall the SQ Flex pumps will run on 90VAC to 240VAC. I had several > lengthy talks with the engineers in the KS. City office re. the failure to > stop on command situation. While they were helpful with some aspects they > completely denied the situation we were experiencing existed or could exist. > This despite the fact that I had stood there and witnessed the event > happening real time. They wanted me to take a picture of the controller with > the pump running and send it to them?????? We finally opted for a pressure > switch to actually break the current to the pump as the CU200 stop command > was being ignored by the pump. I don't think I know of any of the installs > around here actually seeing the 240AC though but I think it was one of the > engineers there who I discussed it with. > Nathan Jones > Power Source Solar > > > From: Allan Sindelar <[email protected]> > To: Kirpal Khalsa <[email protected]> > Cc: RE-wrenches <[email protected]> > Sent: Wed, April 6, 2011 6:28:35 PM > Subject: Re: [RE-wrenches] Grundfos SQ Flex > > Kirpal, > I have never tried to feed 240V to an IO101, so I don't know the answer. But > as the pump takes a maximum of only 950-1100 watts (approximate here, from > memory). The usual reason for adding an IO101 is to allow a portable > generator to back up a PV array during cloudy weather or a broken pipe, and > the most portable generators are the little 1kW or 2kW inverter-generators, > and the supplied AC pigtail is 15A 120V, so that's all I have ever tried. > Sorry. > > You may have to look at a unit directly. I seem to recall it contains an > Allen-Bradley AC contactor, and you can check the specs on the contactor > directly. > > Sat nam. > Allan > > Allan Sindelar > [email protected] > NABCEP Certified Photovoltaic Installer > NABCEP Certified Technical Sales Professional > New Mexico EE98J Journeyman Electrician > Positive Energy, Inc. > 3201 Calle Marie > Santa Fe, New Mexico 87507 > 505 424-1112 > www.positiveenergysolar.com > > > > > On 4/6/2011 5:08 PM, Kirpal Khalsa wrote: >> >> Allan.....According to the IO101 literature it is rated at upto >> 265VAC......however in all its wiring "drawings" it only shows one hot, one >> neutral and a ground!?? I am puzzled.....? >> Kirpal >> >> On Wed, Apr 6, 2011 at 2:23 PM, Allan Sindelar >> <[email protected]> wrote: >> Kirpal, >> I believe that the IO101 is only designed to accept 120VAC, not 240. The >> supplied AC pigtail is 15A 120V, and it uses a contactor, which would be a >> specific voltage only. Unless I'm mistaken, you don't want to supply 220 >> (240) VAC. >> >> I don't have answers for your other questions. >> Allan >> >> Allan Sindelar >> [email protected] >> NABCEP Certified Photovoltaic Installer >> NABCEP Certified Technical Sales Professional >> New Mexico EE98J Journeyman Electrician >> Positive Energy, Inc. >> 3201 Calle Marie >> Santa Fe, New Mexico 87507 >> 505 424-1112 >> www.positiveenergysolar.com >> >> >> >> >> On 4/6/2011 2:55 PM, Kirpal Khalsa wrote: >>> Hi all....so I have a pumping project using a grundfos SQ Flex pump....It >>> will operate on the grid when grid is present and then switch back to solar >>> ready if the grid power should fail.....here is the set up... >>> 5-Sanyo HIT 220's Vmp non temp adjusted is 213VDC >>> Pump is SQFlex 16 SQF-10 will have CU 200 controller and IO101 AC input >>> box.... >>> >>> System has a pressure tank and pressure switch which will be used instead >>> of float switch as there is no storage tank at or above ground level.... >>> This system is a retrofit project to an existing well pumping system...... >>> Here is my questions: >>> 1. Pump and CU 200 controller are rated for upto 300VDC but IO 101 >>> Controller is only rated for 225VDC.....is that open circuit or max power >>> on the modules.... >>> 2. The Grundfos wiring diagrams only show 2 wires and a ground leaving the >>> IO101 going to the CU200.....What is happening when there is 240VAC >>> supplying the system and what happens when it switches back to DC how is >>> the power transmitted on those wires? What happens to the second leg of >>> the 240VAC generator/grid input? >>> 3. Has anyone done one of these Grundos SQFlex back up water pumping >>> systems connected to a pressure tank and did it operate as expected? >>> Grundfos does not offer tech support.......that is kind of a bummer.... >>> Thanks for any advice or help.... >>> >>> >>> -- >>> Sunny Regards, >>> Kirpal Khalsa >>> NABCEP Certified Solar PV Installer >>> Renewable Energy Systems >>> www.oregonsolarworks.com >>> 541-218-0201 m >>> 541-592-3958 o >>> >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: [email protected] >>> >>> >>> Options & 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 participant bios: >>> www.members.re-wrenches.org >>> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: [email protected] >> >> Options & 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 participant bios: >> www.members.re-wrenches.org >> >> >> >> >> >> -- >> Sunny Regards, >> Kirpal Khalsa >> NABCEP Certified Solar PV Installer >> Renewable Energy Systems >> www.oregonsolarworks.com >> 541-218-0201 m >> 541-592-3958 o > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & 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 participant bios: > www.members.re-wrenches.org >
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