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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Allan, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This is all Dwight at Genpro could tell
me. . .sorry to be vague! I agree, it seems like it would not know the difference.
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span
style='font-size:11.0pt;font-family:Calibri;color:#1F497D'>I would love to shed
some light, however this was shared with us at the NGWA show by a Grundfos
Engineer. It has something to do with the thrust load bearing on a
them. Lorentz has two I believe Grundfos has one.</span></font><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Best regards,<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'><o:p> </o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Mark </span></font><font
size=2 color=navy face="Comic Sans MS"><span style='font-size:10.0pt;
font-family:"Comic Sans MS";color:navy'>Dickson,</span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face=ArialMT><span
style='font-size:10.0pt;font-family:ArialMT;color:navy'>NABCEP Certified Solar
PV Installer ™<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Oasis Montana
Inc.<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Allan Sindelar<br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, May 24, 2010 2:39 PM<br>
<b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches]
Grundfos SQ FLEX AC/DC auto switching</span></font><font color=black><span
style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt'>Mark,<br>
Your message gave me pause, as I just last week specified this setup, so I
checked into it with our Grundfos rep. He said he had never heard anything
recommending against the flex in a pressure system. He said the SQF doesn't
know the difference between 40 psi and 100' of head. At the end of the day the
pump just stops. <br>
<br>
He did make a point of emphasizing the need for pressure relief valves, as the
helical rotor models can overpressure a system.<br>
<br>
Could you check with your distributor about this and post the reason you're
given, please?<br>
Allan<o:p></o:p></span></font></p>
<div><!--[if gte mso 9]><xml>
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face="Times New Roman"><span style='font-size:12.0pt;font-weight:bold'><!--[if gte mso 9]><xml>
<u4:shapedefaults u5:ext="edit" spidmax="2050"/>
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</xml><![endif]-->Allan</span></font></b></span><b><span style='font-weight:
bold'> Sindelar</span></b><font size=2><span style='font-size:10.0pt'><br>
<a href="mailto:Allan@positiveenergysolar.com" target="_blank"><span class=il>Allan</span>@positiveenergysolar.com</a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b><span style='font-weight:bold'>Positive Energy, Inc.</span></b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b><span style='font-weight:bold'>505 424-1112</span></b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
Mark Dickson wrote: <o:p></o:p></span></font></p>
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10.0pt;font-family:Arial;color:navy'><!--[if gte mso 9]><xml>
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</xml><![endif]-->Our Grundfos pump distributor has always warned against using
the SQF pumps in pressure pumping situations. I can’t quite
remember why, but you may want to check into that. The Lorentz HR’s
have been the choice in these situations.<u12:p></u12:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u12:p> </u12:p></span></font><o:p></o:p></p>
<div>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Best regards,<u12:p></u12:p></span></font><o:p></o:p></p>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'><u12:p> </u12:p></span></font><o:p></o:p></p>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Mark Dickson,</span></font><o:p></o:p></p>
<u12:p></u12:p>
<p class=MsoAutoSig><font size=2 color=navy face=ArialMT><span
style='font-size:10.0pt;font-family:ArialMT;color:navy'>NABCEP Certified Solar PV
Installer ™<u12:p></u12:p></span></font><o:p></o:p></p>
<p class=MsoAutoSig><font size=2 color=navy face="Comic Sans MS"><span
style='font-size:10.0pt;font-family:"Comic Sans MS";color:navy'>Oasis Montana
Inc.<u12:p></u12:p></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 color=navy face="Times New Roman"><span
style='font-size:12.0pt;color:navy'> <u12:p></u12:p></span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><u12:p> </u12:p></span></font><o:p></o:p></p>
<div>
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color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> <a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b><span style='font-weight:bold'>On Behalf Of </span></b>Kent Osterberg<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, May 20, 2010 5:18
PM<br>
<b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches]
Grundfos SQ FLEX AC/DC auto switching</span></font><o:p></o:p></p>
</div>
<u12:p></u12:p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><u12:p> </u12:p><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Kirpal,<br>
<br>
None of the SQFlex equipment is UL listed. You may find that your AHJ
won't approve any of the SQFlex controls and possibly not even the pump.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar<br>
<br>
<br>
Kirpal Khalsa wrote: <u12:p></u12:p><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Hi Folks.....I am working on putting together a
domestic water pumping system using a grundfos 11 - SQF - 2. This system
will be connected to a standard pressure tank and cistern and have a solar
array providing primary power. However at night and on cloudy days we
would like the system to switch back over to AC power from the grid. I know
that the grundfos IO 101 switch box allows the pump to use an AC source and
when the AC source is removed it<u> automatically</u> switches back to DC.
What I am looking for is when the DC source (solar) is not available it <u>automatically</u>
switches over to AC power (grid) ( the reverse of what the IO 101 switch does)
and when the DC becomes available again it again <u>automatically</u>
switches back to the DC power (solar). <u12:p></u12:p><o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Has anyone done this? Any recommendations for
configuring this set up. We are looking to provide solar water pumping
during the day both when grid is present and when their is a power outage and
AC pumping at night or cloudy weather all without battery back up.<u12:p></u12:p><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Thanks in advance for any advice.!<u12:p></u12:p><o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>-- <br>
Sunny Regards,<br>
Kirpal Khalsa<br>
NABCEP Certified Solar PV Installer<br>
Renewable Energy Systems<br>
<a href="http://www.oregonsolarworks.com" moz-do-not-send=true>www.oregonsolarworks.com</a><br>
541-218-0201 m<br>
541-592-3958 o<u12:p></u12:p><o:p></o:p></span></font></p>
</div>
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