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

[Darryl Thayer]

HI all 
I have a install where i am going to use the AEE dump
load for water heaters.  

I called and was told that they have a tapered thread
and do not use a rubber washer.  That in 20 years they
have not had a leak problem.  The manufacture
recomended we use teflon tape on threads.

As to the switching of DC I am concerned as to short
life of the contacts.  I am going to try a solid state
relay, and will inform group.

BTW I spoke with Morning Star on the PWM staying on to
prevent arcing, I was told that there is noway to
garrantee the TS45 or 60 stays on PWM.  
Darryl  
 
--- Windy Dankoff <windydankoff at mac.com> wrote:

> 
> Travis,
> 
> In general, mechanical switch contacts rated at
> 250VAC will handle same 
> rated current at 60VDC (with equal arc potential).
> 
> When it's pulsing by PWM, the arc potential is much
> less than constant 
> DC.
> 
> Windy
> 
> Travis wrote:
> > One thing that I haven't figured out is what's
> going to happen to the
> > existing T-stat when I run it on 48v (56v) and PWM
> that???
> 
> 
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