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Hi Allan,<br>
This is not an unusual problem. i have seen it with conventional
forced air heating systems. The burner controls would not run on A
Xantrex or Outback sine wave inverter. There is something about
waveforms from inverters designed by Trace legacy engineers. I had to
put in Exeltech or Studer inverters to operate the heating control
system. you can do this and still run larger pumps and fans on the
Magnum.<br>
David<br>
<br>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">David
Katz</span><span style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">President</span><span
style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">AEE Solar</span><span
style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">1155 <span
class="SpellE">Redway</span>
Drive</span><span style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">P.O. Box
339</span><span style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span class="SpellE"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">Redway</span></span><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">, CA
95560</span><span style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">Tel
(707) 825-1200</span><span style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";">Fax
(707) 825-1202</span><span style=""><o:p></o:p></span></p>
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<p class="MsoNormal"><span
style="font-size: 10pt; font-family: "Verdana","sans-serif";"><a
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<p class="MsoNormal"><span style=""> <o:p></o:p></span></p>
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<br>
Allan Sindelar wrote:
<blockquote cite="mid:42209C2370ED42B395682DC78D6110C2@AllanLaptop"
type="cite">
<pre wrap="">Wrenches,
We have an unusual problem, and I need to know if anyone else has had this
or a related problem, and what to do about it.
This concerns a new off-grid residential system, very conventional: 1,800W
PV, Midnite E-Panel with Magnum MS4448-AE inverter, MX60, 16 S-460s,
installed summer 2008. This existing home is being extensively remodeled,
and the home is not yet occupied. A local mechanical contractor installed a
new infloor radiant (gypcrete) hydronic heating system using a
Netherlands-made (German company) Buderus GB142 high-efficiency boiler. The
problem is that the boiler won't start reliably on the inverter. It appears
that the hot-surface igniter does not get full AC voltage (it runs on
straight 120V AC, but is supplied through the boiler's control circuitry).
We tested the igniter by disconnecting it and plugging it straight into
inverter AC and it lit right up.
The mechanical contractor has tried a replacement Buderus GB142 boiler with
the same result. I was told that they brought out a generator and it also
failed to ignite on generator AC, but not knowing the generator used or the
way it was wired (I believe an extension cord to a portable) I don't put
much weight on this data. They also took a Lochinvar Boiler to the site to
test the theory that a different manufacturer's boiler might work. The
Lochinvar boiler, which uses a different control and a spark ignition rather
than a hot surface igniter, worked on site without any problems.
I'm looking for solutions. Magnum tech support had not heard of this. Have
you?
Also, if indeed we have an inverter that is incapable of running this load,
how do we make it right to the homeowner and the mechanical contractor? What
should be Magnum's obligation? What should be ours? This issue hasn't come
up here since the days when the Trace SW mod-sine series was the waveform
standard.
Thanks,
Allan Sindelar
allan_(at)_positiveenergysolar.com <a class="moz-txt-link-rfc2396E" href="mailto:allan@positiveenergysolar.com"><mailto:allan@positiveenergysolar.com></a>
NABCEP certified solar PV installer
Positive Energy, Inc.
3225A Richards Lane
Santa Fe NM 87507
505 424-1112
</pre>
<pre wrap="">
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