June 29, 2014 at 10:55 pm #180
This thread is a summary of the electric hot water heater control project I’ve somewhat wrapped up. (Caution: Working with electricity can be dangerous. Any information used from this site should be used at your own risk)
Water Heater Control Box:
The above image depicts the water heater control box which is a modified Network Interface Unit cabinet I had. I added the red LED as an indicator when the water heater is offline.
Water Heater Control Box Inside View 2:
The above image depicts the inside of the water heater control cabinet with the hinged “panel” open showing the SSR, CT and high voltage connections. The hinged panel worked well for safety.February 14, 2015 at 8:11 pm #245
Well, the Crydom relay fried. They get extremely hot and apparently the little heat sink I used wasn’t sufficient. I would not recommend using one unless you have a better mounting option and method to keep it cooler for this application. I’m going to look at a mechanical relay next and update this once I find out. I’m not too worried as I’d prefer to find a normally closed relay this time instead of the SSR normal open. More to come . . .
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