Quote:
Originally Posted by Patrick
It currently has 2 4500W heating elements. I think it starts with the bottom one and if the temp gets too low it adds the top one.
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That's a lot of juice! Maybe you could disconnect the top heater and just
use the bottom one. The lines to the temperature switch removed?
For current like that, perhaps both NO contacts could run in parallel?
Maybe you can tell that I'm not really an Electrician, just an old retired Electronics guy.
I was just thinking about wear on relay contacts. If it's only a couple of cycles per day,
those contacts might outlive me and my offspring.
When the contacts close on my system, there is about a 20-second time delay,
before the oil burner motor can start (if the water temp is low).
The time delay is caused by the initializing of two electronic controllers.
So, there isn't a sudden motor load surge, the instant of relay on.
I have a second relay to fall back on, and in 20 years if both are pitted,
I can switch to the NC contacts and reverse all the time segment pins.
