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Nathan,<br>
My understanding is that the pumps will run on 90-300VAC and
30-300VDC, but they're happiest around 90-120V AC or DC. But all of
the discussion so far is about the IO101 AC interface, not the pump.<br>
About the failure-to-stop issue I have no experience.<br>
Allan<br>
<br>
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<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a href="mailto:Allan@positiveenergysolar.com"><font
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serif"><br>
<span style="font-size: 10pt;">NABCEP Certified Photovoltaic
Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a><o:p></o:p></span></font>
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On 4/6/2011 5:48 PM, Nathan Jones wrote:
<blockquote cite="mid:470470.93845.qm@web113618.mail.gq1.yahoo.com"
type="cite">
<style type="text/css"><!-- DIV {margin:0px;} --></style>
<div style="font-family: arial,helvetica,sans-serif; font-size:
12pt;">
<div>Allan,</div>
<div>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.<br>
Nathan Jones</div>
<div>Power Source Solar</div>
<div> </div>
<div style="font-family: arial,helvetica,sans-serif; font-size:
12pt;"><br>
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font-size: 12pt;"><font size="2" face="Tahoma">
<hr size="1">
<b><span style="font-weight: bold;">From:</span></b> Allan
Sindelar <a class="moz-txt-link-rfc2396E" href="mailto:allan@positiveenergysolar.com"><allan@positiveenergysolar.com></a><br>
<b><span style="font-weight: bold;">To:</span></b> Kirpal
Khalsa <a class="moz-txt-link-rfc2396E" href="mailto:solarworks@gmail.com"><solarworks@gmail.com></a><br>
<b><span style="font-weight: bold;">Cc:</span></b>
RE-wrenches <a class="moz-txt-link-rfc2396E" href="mailto:re-wrenches@lists.re-wrenches.org"><re-wrenches@lists.re-wrenches.org></a><br>
<b><span style="font-weight: bold;">Sent:</span></b> Wed,
April 6, 2011 6:28:35 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: [RE-wrenches] Grundfos SQ Flex<br>
</font><br>
Kirpal,<br>
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.<br>
<br>
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.<br>
<br>
Sat nam.<br>
Allan<br>
<br>
<div class="moz-signature"><font face="Times New Roman,
Times, serif"><b>Allan Sindelar</b></font><br>
<small><a moz-do-not-send="true"
href="mailto:Allan@positiveenergysolar.com"
rel="nofollow" target="_blank"
ymailto="mailto:Allan@positiveenergysolar.com"><font
color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font
face="Times New Roman, Times, serif"><br>
<span style="font-size: 10pt;">NABCEP Certified
Photovoltaic Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b>505 424-1112</b><br>
<a moz-do-not-send="true"
href="http://www.positiveenergysolar.com/"
rel="nofollow" target="_blank"><u>www.positiveenergysolar.com</u></a></span></font>
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<br>
On 4/6/2011 5:08 PM, Kirpal Khalsa wrote:
<blockquote type="cite">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.....?<br>
Kirpal<br>
<br>
<div class="gmail_quote">On Wed, Apr 6, 2011 at 2:23 PM,
Allan Sindelar <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:allan@positiveenergysolar.com"
rel="nofollow" target="_blank"
ymailto="mailto:allan@positiveenergysolar.com">allan@positiveenergysolar.com</a>></span>
wrote:<br>
<blockquote style="border-left: 1px solid rgb(204, 204,
204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"
class="gmail_quote">
<div>Kirpal,<br>
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.<br>
<br>
I don't have answers for your other questions.<br>
Allan<br>
<br>
<div><font face="Times New Roman, Times, serif"><b>Allan
Sindelar</b></font><br>
<small><a moz-do-not-send="true"
href="mailto:Allan@positiveenergysolar.com"
rel="nofollow" target="_blank"
ymailto="mailto:Allan@positiveenergysolar.com"><font
color="#000099" face="Times New Roman,
Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font
face="Times New Roman, Times, serif"><br>
<span style="font-size: 10pt;">NABCEP Certified
Photovoltaic Installer<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
<b>Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b><a moz-do-not-send="true" rel="nofollow">505
424-1112</a></b><br>
<a moz-do-not-send="true"
href="http://www.positiveenergysolar.com/"
rel="nofollow" target="_blank"><u>www.positiveenergysolar.com</u></a></span></font>
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class="MsoNormal"><span style="font-size: 10pt;"><b><br>
</b></span></p>
<span style="font-size: 10pt;"><br>
</span></div>
<div class="im"><br>
On 4/6/2011 2:55 PM, Kirpal Khalsa wrote: </div>
<blockquote type="cite">
<div>
<div class="h5">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 moz-do-not-send="true"
href="http://www.oregonsolarworks.com/"
rel="nofollow" target="_blank">www.oregonsolarworks.com</a><br>
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m<br>
<a moz-do-not-send="true" rel="nofollow">541-592-3958</a>
o<br>
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-- <br>
Sunny Regards,<br>
Kirpal Khalsa<br>
NABCEP Certified Solar PV Installer<br>
Renewable Energy Systems<br>
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