Seems that I remember that the APC and other backups are not a sine wave but a modified wave? But it's been a while.
Bob On Wed, Feb 11, 2009 at 9:52 AM, Howie Michaelson <ho...@suncatchervt.com>wrote: > I installed an off-grid system with identical symptoms: > > OB VFX 3648 dual stack > Buderus GB142-24 > Kohler 12 kW propane genny > > The boiler runs fine on the inverter power, but will occasionally error > out (6A) and shut down while the generator is running (usually after it > has been on for hours). The plumber installed an APC uninterruptable > power supply/surge suppressor (not sure of the model) before the boiler, > but when running on the internal inverter, the symptoms seemed to get > worse. When running on just the surge suppressor portion, the symptoms > were the same as if the APC wasn't in-line. We've checked the grounding > at the genny, made sure the neutral was isolated except for the main > panel, still the same problem. Seems this is a Buderus issue (or at least > not an inverter one) - see: > > > http://www.buderus.net/Support/TechnicalInfoForums/tabid/132/forumid/15/threadid/4334/scope/posts/Default.aspx > > I haven't been able to make the boiler run reliably when the genny is on, > which is a problem in our climate, when the client goes away in the > winter... > > Howie > -- > Howie Michaelson > NABCEP Certified Solar PV Installer™ > > Sun Catcher, LLC > Renewable Energy Systems Sales and Service > VT Solar & Wind Incentive Program Partner > http://www.SunCatcherVT.com <http://www.suncatchervt.com/> > (cell) 802-272-0004 > (home) 802-439-6096 > > > On Wed, February 11, 2009 7:47 am, Darryl Thayer wrote: > > Some of the hot surface ignitors I have seen draw a lot of current, in > the > > order of amps. I would expect the inverter to drop out if it were > > overloaded however. Also does the magnum drop voltage at very low loads? > > Where the furnace controls can not function due to low voltage or poor > > wave shape. > > > > Darryl > > > > > >> > >> This may be true about high frequency switching interfering > >> with something, but I believe the problem with this ignitor > >> is that it is a very poor design. Judging by what I read on > >> their company forum, it doesn't look like they have a > >> clue about > >> this problem. Maybe you can go inside the Buderus and > >> filter something there or maybe you can fine another product > >> to try ? > >> > >> boB > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > >
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