Rinnai boiler controller [RE-wrenches]

[Kurt Albershardt]

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Is it actually a voltage problem?  If not, you can skip the switched-tap type regulators and use a power conditioner (beware of misuse of this term) -- basically a 2nd order filter (transformer or inductor) plus cap.  I like used Oneac boxes from eBay (about 5 cents on the dollar, but freight can easily double that.)  You might try the now-discontinued CL series for a small load like this - search eBay for 'oneac cl*' and you'll get a nice assortment.  There are definitely some parasitic losses 
with these, but the output waveform will be clean.




--On Tuesday, February 05, 2008 4:41 PM -0800 Christopher Freitas --- OutBack Power <cfreitas at outbackpower.com> wrote:

>
> Kirk -
>
> I have seen problems with these before as well - they are extremely
> sensitive.  They seem to work fine on the OutBack inverters but we have
> had reports of problems with them when the generator is running and the
> charger is pulling power.  This customer even turned off the OutBack's
> charger and had issues when he connected a IOTA charger to the generator
> as well.  I think it was a particularly flakey generator - but that
> still seems pretty extreme.
>
> We did work up a filter for the customer as a favor to the dealer - who
> is not on the wrenches list - but I know it did draw some idle power and
> was not particularly efficient.  The filter was similar to a ferro /
> constant voltage transformer - which are available off-the-shelf which
> might work.
>
> Here is a link to some I used years ago with SWs and oil-fired furnace
> controllers:
>
> Sola -
> http://www.solaheviduty.com/products/powerconditioning/mcr_port.htm
>
> General information - http://en.wikipedia.org/wiki/Voltage_regulator
>
> Warning - they do make some noise and get warm all the time they are
> on...
>
> I hope this helps!
>
>
> Christopher
>
> Christopher Freitas
> Director of Research of Development
> OutBack Power Systems, Inc.
> cfreitas at outbackpower.com
> Tel 360 435 6030
> cell 360 202 4239
> 19009 62nd Ave NE
> Arlington WA 98223 USA
> www.outbackpower.com
>
> -----Original Message-----
> From: Kirk Herander [mailto:kirk at vtsolar.com]
> Sent: Tuesday, February 05, 2008 7:40 AM
> To: RE-wrenches at topica.com
> Subject: Rinnai boiler controller [RE-wrenches]
>
>
>
> I have a situation were a Rinnai wall-mounted boiler occasionally shuts
> down. Its controller indicates a line frequency error. This is off-grid,
> -2-
> Xantrex 4048 inverters w/15kw generator backup.
>
>
>
> Nailing it down to coincide w/generator turn on/off, load variation,
> Xantrex
> waveform steps, ect. is close to impossible due to its randomness.
> Outside
> of dedicating a true sine wave to the boiler, what alternatives are out
> there? Its been years since I explored line filters, but as I recall
> they
> were extremely inefficient and not all that cheap. Thanks.
>
>
>
> Kirk Herander
>
> Vermont Solar Engineering
>
> 802.863.1202
>
> fax 802.863-7908
>
> NABCEP(tm) Certified Solar PV Installer
>
> Xantrex Certified Dealer Charter Member
>
> NYSERDA-eligible installer
>
> VT Solar Incentive Program Partner









.


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