<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>I've definitely had some Grundfos failures from the way back
days, but their Alpha ECM circulator series has been really solid,
as well as Taco's ECM drive circulators. To be clear ECM is
variable speed drive VSD, but not variable frequency drive VFD.
ECM varies DC voltage to a DC motor to vary speed, while VFD
varies frequency to a 3 phase motor to vary speed. <br>
</p>
<p>Or at least that's the way my feeble mind understands it......<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 9/17/20 9:42 AM, Dave Angelini
Offgrid Solar wrote:<br>
</div>
<blockquote type="cite"
cite="mid:639b6513fd16bcaf8ebf016442751b93@127.0.0.1">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<p>Look at the recent Grundfos Scala2 recall, they have sold some
really bad pumps, so AC is not always best. For Offgrid a spare
inverter is often called for because critical systems do need
back-up. Many applications/requirements are different.</p>
<div class="kFGdxc match-mod-horizontal-padding"
data-hveid="CAoQAQ"
data-ved="2ahUKEwjVxpmkw_DrAhVWsp4KHTeDDUoQwrcBKAB6BAgKEAE">
<div class="JpTGae">Grundfos scala2 pump recall</div>
</div>
<div class="kJ442">
<div class="nJXjse"
data-ved="2ahUKEwjVxpmkw_DrAhVWsp4KHTeDDUoQw7cBKAF6BAgKEAI">
<div class="mod" data-md="61" lang="en-US">
<div class="LGOjhe" data-attrid="wa:/description"
data-hveid="CAoQAw"><span class="ILfuVd NA6bn"><span
class="hgKElc">They have been <strong>recalling</strong> or
"updating" all VFD type <strong>pumps</strong> for 30+
years now. It is all part of their planned
obsolescence. The more electronics you have in a <strong>pump</strong> system,
the less likely water is to come out of a faucet when
opened, and the more it is going to cost you</span></span></div>
</div>
</div>
</div>
<p> </p>
<p>Winter is coming :)</p>
<div>
<pre> </pre>
<pre><strong><span style="font-size: small;">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank" moz-do-not-send="true">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" moz-do-not-send="true">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
</div>
<p>On Thu, 17 Sep 2020 09:30:43 -0600, Ray
<a class="moz-txt-link-rfc2396E" href="mailto:ray@solarray.com"><ray@solarray.com></a> wrote:</p>
<blockquote type="cite" style="padding-left:5px;
border-left:#1010ff 2px solid; margin-left:5px; width:100%"><!-- html ignored -->
<!-- head ignored -->
<!-- meta ignored -->
<p>Actually best of all: you don't have to run low voltage DC
circuits to the pump room. Another thing about the ECM drive
pumps, they have much higher flow rates available than the El
Cids. And if you're worried about your old school street cred
in the off grid world, they are still technically DC at the
drive, for those old timers that insist on DC.</p>
<pre class="moz-signature">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 9/17/20 6:54 AM, Dana Orzel
wrote:</div>
<blockquote type="cite" style="padding-left:5px;
border-left:#1010ff 2px solid; margin-left:5px; width:100%"><!-- meta ignored -->
<!-- meta ignored -->
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size: 14.0pt;">I have
El-cids in stock & am selling them off.<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 14.0pt;">I have
switched to the new AC technology that Grundfoss &
TACO offer. They are called ECM pumps. Electronically
Commutated Pump motors. AC-DC motors, soft start,
variable speed, super-efficient, best of all very QUIET!<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 14.0pt;"><!-- o ignored --> </span></p>
<div style="mso-element: para-border-div; border: none;
border-bottom: solid windowtext 1.5pt; padding: 0in 0in
1.0pt 0in;">
<p class="MsoNormal" style="border: none; padding: 0in;"><span
style="font-size: 14.0pt;"><!-- o ignored --> </span></p>
</div>
<p class="MsoNormal"><span><!-- o ignored --> </span></p>
<p class="MsoNormal"><span style="font-size: 14.0pt;">Dana
Orzel Great Solar Works,
Inc.
<!-- o ignored --></span></p>
<p class="MsoNormal"><strong><span style="font-size:
14.0pt;">C - 208.721.7003 <a
class="moz-txt-link-abbreviated"
href="mailto:dana@solarwork.com"
moz-do-not-send="true">dana@solarwork.com</a><!-- o ignored --></span></strong></p>
<p class="MsoNormal"><span style="font-size: 14.0pt;">Idaho
Contractor - # 028765 Idaho PV # 028374<!-- o ignored --></span></p>
<p class="MsoNormal"><span style="font-size: 14.0pt;">NABCEP
# 051112-136 <a
href="http://www.solarwork.com/"
moz-do-not-send="true"><span style="color: blue;">www.solarwork.com</span></a><!-- o ignored --></span></p>
<p class="MsoNormal"><span style="text-decoration:
underline;"><span style="font-size: 14.0pt;">"Responsible
Technologies for Responsible People since 1988" </span></span><span
style="text-decoration: underline;"><span
style="font-size: 14.0pt;"><!-- o ignored --></span></span></p>
<p class="MsoNormal" style="background: white;"><strong><span
style="font-size: 18.0pt; font-family: Webdings;
color: green;">P</span></strong><span> </span><span
style="font-size: 10.0pt;">Please consider the
environment before printing this email.</span><span><!-- o ignored --></span></p>
<p class="MsoNormal"><!-- o ignored --> </p>
</div>
</blockquote>
</blockquote>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
List sponsored by Redwood Alliance
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Change listserver email address & settings:
<a class="moz-txt-link-freetext" 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>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out or update participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
</blockquote>
</body>
</html>