Quote:
Originally Posted by Xringer
Not thinking about the "hybrid" feature now..
But, it looks like it wouldn't be too hard to put the two built-in Tstats in series.
If either one opened, it could shut off the power.
It would be pretty be simple to design a dual safety circuit.
(A redundant backup system that would work in parallel).
So, you would have to have dual failures to get over-heating..
But, nothing electronic is ever 100% reliable. (due to lightning storms).  |
I agree with you about electronics but go the other way. Just put contactor that closes your main line (L1 L2) and connect its coil(line voltage or 24V in series with fusible switch). Fusible switch will melt inside at set temperature and lock out the contactor. If you want you can put 2 fusible switches in series or 3 or..... They are precisely calibrated and you can choose them with 3-5 degree difference. One of them will work 100%
I am sure the capacity of this heater is not going to be enough. It is just a matter of time when you start cursing in the shower...... and add "hybrid" mode.....
It really sucks to think about if you have enough hot water in your tank. Life is too short to think about things like this. Just do it right and forget.....
