Anybody know about swimming pool electric valves?

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#1
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Situation: our temperature controller for our solar heated swimming pool isn't working, and it's a real pain to manually switch the valve back and forth to maintain a nice temperature. Pool guy says it'll cost $600 to fix. I say, it's a temperature sensor, a valve actuator signal and a setpoint, why can't I do it myself?

I assume the temperature sensor is some sort of resistive device, I can figure that out. What about the valve? It switches from input A to input B either by manual switch or from the controller. Is there a standard for these things? Just trying to collect some data before I dive in (hmmm...).

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Maybe some pictures or model numbers? (so we don't think you're all wet...)

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Quote:
Anybody know about swimming pool electric...

Well, there was this one AVRFreaks poster who did a "lot" of swimming pool work.

Right up to the point he won his Darwin Award ;)

JC

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Solenoid valves are sort of trivia. Majority is "standard" in terms of terminals, coils etc. Assuming a pool operation probably low voltage ones are used.
Thermal sensor - the same. If I am getting the point, You have controller broken and the rest intact, right? If so, a good picture of existing set up may do help generating a lot of useful ideas for sure.