It was built on the cheap. All from eBay and lowes. The reason there are two timers is it was $8 for a one hour timer and $50+ for anything longer. So I got two one hour timers and daisy chained them together. I drew a schematic last night before I wired it, but accidentally drew it fed off one power source vs two. I'll try to draw another one as soon as I see if it works as it should. Basically, the black contractor is just a switch for the booster pump. All the other **** just controls that switch. Power for the control side will be fed from my main pump timer so it will only be able to operate if the main pump is powered on. Power will come in to one side of the contractor, and also connect to one side of the relays. The other line will go through the stop button, through the start button and also to the common line on the timers. The common will always be hot when the main pump is running, so when you push the green button the timer will close a set of normally open contacts sending power to the coil on the second relay so it also closes a set of contacts, and from there it goes to the coil on the contractor. In theory, the first timer will time out at one hour, then the second timer will begin to count down for an additional hour. Worst case, they both time out at an hour because the second one ignores the input voltage once the timer is started, and I'll have the start of a Rube Goldberg machine. My electrician at work thought daisy chaining the timers would work, and I'm hopeful. We'll see.
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