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<title>Re: [RE-wrenches] Need simple solution to reverse dry-contact logic on
SQF water system</title>
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<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif"'>There
is a pause in the CU200’s switchover it is not a consistent time
span either.<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif"'>Is
there any one from Grundfos on the list that can comment?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:14.0pt;font-family:"Century Gothic","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>Thanks,
Dana Orzel<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>Great
Solar Works, Inc<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>E -
dana@solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>V -
970.626.5253<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>F -
970.626.4140<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>C -
970.209.4076<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>web
- www.solarwork.com<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-family:"Century Gothic","sans-serif"'>"Responsible
Technologies for Responsible People since 1988"</span><span
style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p>
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<p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>solardude97<br>
<b>Sent:</b> Friday, October 15, 2010 4:05 PM<br>
<b>To:</b> allan@positiveenergysolar.com; re-wrenches@lists.re-wrenches.org<br>
<b>Subject:</b> Re: [RE-wrenches] Need simple solution to reverse dry-contact
logic on SQF water system<o:p></o:p></span></p>
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<p style='margin-left:.5in'><span style='font-size:10.0pt'>Allan,<br>
A very simple way to do this is install a float in the tank you are pumping to
with a shutoff valve controlled by the float. Install a Square D pressure
switch with a DC rating by the pump. As the float rises to full in the
tank and chokes off the discharge outlet the pressure in the line will rise and
trip the pressure switch. We are using this method exclusively as there seems
to be a glitch in the high frequency communication between the SQ Flex and the
CU 200 controller. The pump is not shutting off on command from the
controller consistently in stand alone applications. I am aware of a
half dozen of these systems experiencing this issue.<br>
You might install a small pressure tank in the line to avoid water hammer in
the system. Simple and cheap.<br>
Nathan Jones<br>
Power Source Solar Inc.<br>
Springfield, MO<br>
417-833-4274<br>
<br>
<br>
<o:p></o:p></span></p>
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