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 <[email protected]> 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 <[email protected]
> 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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