I uncharacteristically did not take pictures. The above instructions illustrate the process better than I could.
I soldered all the connections to the peripherals and added connections to the high voltage box. I put it all together, updated the programming and plugged it it. It was a complete success... until... it cooled down to the set temp and began thrashing. The temp flickered back and forth between 51 degrees and 49 degrees about twice a second. The relay was clicking back and forth like a buzzer.
I pulled it out of service and I am working on a way to delay the cycling. My goal is to make it stay on for an extra 10 minutes to allow the temperature to "latch" and stay off on the way up for the same reason.
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