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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>As I understand the 2 wire at 240VAC is the neutral is handled through the ground & well water. I have always questioned this as it would make the ground current carrying & have never gotten a good answer.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'>Some wrench enlighten us on this, please.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>Dana Orzel<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>Great Solar Works, Inc<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>E - dana@solarwork.com<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>V - 970.626.5253<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>F - 970.626.4140<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>C - 970.209.4076<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>web - www.solarwork.com<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>"Responsible Technologies for Responsible People since 1988"</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext'><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif";color:windowtext'>Do not ever believe anything, but seriously trust through action.<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif";color:windowtext'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Roy Butler<br><b>Sent:</b> Wednesday, April 06, 2011 3:07 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> Re: [RE-wrenches] Grundfos SQ Flex<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><p class=MsoNormal style='margin-left:.5in'>Kirpal,<br><br>Although I can't answer your IO101 question, I can tell you that the SQ Flex operates nicely for us <br>when used with a pressure tank/ pressure switch. As long as the pump and PV power source are<br>sized to accommodate the additional vertical lift caused by the tank pressure, all is good.<br><br>As for the 2 current carrying conductors, that still fascinates me. When using 240 AC, the 2 phase<br>wires from the grid are attached to the blue and brown wires from the pump. <br><br>When switched over to the array, the DC positive and negative are attached to the same brown and blue<br>wires but the polarity doesn't matter. It's all taken care of by the electronics in the pump. Takes a while<br>to get used to that.<br><br>And have you seen the documentation that comes with the pump and CU200? I'm embarrassed to include<br>them in the customer's document package...they're all pictures and no text....sigh....<br><br><o:p></o:p></p><pre style='margin-left:.5in'>Roy Butler<o:p></o:p></pre><pre style='margin-left:.5in'>NABCEP Certified Solar PV Installer®<o:p></o:p></pre><pre style='margin-left:.5in'>NYSERDA eligible PV & wind installer<o:p></o:p></pre><pre style='margin-left:.5in'>PA Sunshine Program Approved PV Installer<o:p></o:p></pre><pre style='margin-left:.5in'>Four Winds Renewable Energy, LLC<o:p></o:p></pre><pre style='margin-left:.5in'>8902 Route 46<o:p></o:p></pre><pre style='margin-left:.5in'>Arkport, NY 14807<o:p></o:p></pre><pre style='margin-left:.5in'>607-324-9747<o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'><a href="http://www.four-winds-energy.com">www.four-winds-energy.com</a><o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>Although no trees were killed in the sending of this message,<o:p></o:p></pre><pre style='margin-left:.5in'>a large number of electrons were terribly inconvenienced.<o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><p class=MsoNormal style='margin-left:.5in'><br>On 4/6/2011 4:55 PM, Kirpal Khalsa wrote: <o:p></o:p></p><p class=MsoNormal style='margin-left:.5in'>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...<br>5-Sanyo HIT 220's Vmp non temp adjusted is 213VDC<br>Pump is SQFlex 16 SQF-10 will have CU 200 controller and IO101 AC input box....<br><br>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....<br>This system is a retrofit project to an existing well pumping system......<br>Here is my questions:<br>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....<br>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?<br>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?<br>Grundfos does not offer tech support.......that is kind of a bummer....<br>Thanks for any advice or help....<br><br clear=all><br>--<br>Sunny Regards,<br>Kirpal Khalsa<br>NABCEP Certified Solar PV Installer<br>Renewable Energy Systems<br><a href="http://www.oregonsolarworks.com">www.oregonsolarworks.com</a><br>541-218-0201 m<br>541-592-3958 o<br><br><o:p></o:p></p><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>_______________________________________________<o:p></o:p></pre><pre style='margin-left:.5in'>List sponsored by Home Power magazine<o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>Options & settings:<o:p></o:p></pre><pre style='margin-left:.5in'><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>List rules & etiquette:<o:p></o:p></pre><pre style='margin-left:.5in'><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre><pre style='margin-left:.5in'>Check out participant bios:<o:p></o:p></pre><pre style='margin-left:.5in'><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><o:p></o:p></pre><pre style='margin-left:.5in'><o:p> </o:p></pre></div></body></html>