AEE Dump Load Element for Water Heaters [RE-wrenches]

[William Mellema]

Hello Darryl,

There is no mechanism to fix or limit the duty cycle on the TriStar via 
hardware or software. The PWM frequency is 300Hz. The size of the 
diversion load drives the maximum duty cycle. For example, if you have 
10A of diversion load and 5A peak charging current, max duty cycle will 
be approx. 50%. 

Bill
MS Corp.

Darryl Thayer wrote:
> 
> hello all
> If someone finds a solution please tell us.
> The other problem about the switching, for example
> using two top element controls to bypass as the tank
> heats is also significant.  If the Morningstar could
> be set to a max of 50% duty cycle at about 60 hertzs
> maybe the zero crossing could extinguish the arc.  
> 
> I will drop a note to Morningstar and let people know
> what - if they respond.
> Darryl 
> --- Bill Loesch <solar1online at charter.net> wrote:
> 
> > 
> > Hi Travis,
> > 
> > My compliments for recognizing the difference in
> > threads. You are right the
> > manufacturer who makes the low voltage heater
> > element should also provide
> > the "adapter" for the threads. They don't. The next
> > best thing is to go to
> > your local friendly machine shop or welding shop and
> > have them make the
> > adapter.
> > 
> > I think your "neighbor", Bob Rohr, addressed this
> > issue in one of his
> > articles on in-floor radiant heat.
> > 
> > Did you get to see this years crowd of Solar
> > Decathlon homes?
> > 
> > Bill Loesch
> > Solar 1 - Saint Louis Solar
> > 314 631 1094
> > 
> > ----- Original Message ----- 
> > From: "Travis Creswell"
> > <tcreswell at ozarkenergyservices.com>
> > To: <RE-wrenches at topica.com>
> > Sent: Monday, March 31, 2008 11:03 AM
> > Subject: AEE Dump Load Element for Water Heaters
> > [RE-wrenches]
> > 
> > 
> > >
> > > Hello All,
> > >
> > > I'm trying to replace standard screw-in water
> > heater elements with
> > elements
> > > supplied by AEE.  This is for a wind turbine dump
> > load.  The AEE elements
> > do
> > > not have any sort of shoulder or washer head on
> > them which I think is
> > > imperative to a obtaining a proper seal.
> > >
> > >
> > > Every standard water heater element relies on this
> > shoulder to force the
> > > rubber washer into a groove on the water heater
> > for a water tight seal.
> > The
> > > water heater fitting along with the old and new
> > elements are straight
> > > threads which is standard for water heater
> > elements.  I'm no plumber but
> > > I've changed out my fair share of elements over
> > the years and I see no
> > > possible way to make the AEE elements seal
> > properly over the long run.  I
> > > suppose I could get enough Teflon tape and pipe
> > dope on there to seal but
> > I
> > > sure wouldn't trust it for very long.
> > >
> > > What am I missing?
> > >
> > > Thanks in advance,
> > > Travis Creswell
> > > Ozark Energy Services
> > >
> > >
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> > > 10:13 AM
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> > >
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