[RE-wrenches] Magnum MS4448AE Compatibility Question

[Ezra Auerbach]

Have you tried a different SW inverter at the site? There is a  
difference between brands.

Also, have you tried a "clean" wave form gennie like the Honda  
inverter series.

Finally I don't think that most manufacturers will guarantee that  
their wave form will power a specific load.

Regards,

Ezra Auerbach



On 9-Feb-09, at 4:18 PM, robert ellison <reellison at gmail.com> wrote:

> I wonder if a work around might be to run the igniter off a relay  
> activated by the original board and fed by the inverter direct?
>
> I have seen things not start when the charger was drawing off the  
> generator, not Magnums but old Hearts.
>
> Bob
>
> On Mon, Feb 9, 2009 at 1:16 PM, Allan Sindelar <allan at positiveenergysolar.com 
> > wrote:
> 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
> NABCEP certified solar PV installer
> Positive Energy, Inc.
> 3225A Richards Lane
> Santa Fe NM 87507
> 505 424-1112
>
>
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