“I bought the single zone relay so the setup was pretty easy, having never done one of these before. It works well with my Taco hydronic heating pump and Nest thermostat. I used the simple on/off with the default in the off position. Interesting that you can use the normal closed position as the default, so something is always running until you trigger it.”
“This is a redesigned SR501 relay. There are no small fuses. Overall it appears to be higher quality. I hope that it proves to be more reliable than TACO's older version. The older ones were problematic on the low voltage side. (They seemed to overheat).”
