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Taco HotLinkPlus-e recirculation system question.
I am about to have a Taco HotLinkPlus-e recirculation system installed for my hot water system in my house. It includes an ECM circulator, a clever valve connecting the hot water line to the cold water line at the furthest fixture in the system, a thermistor sensor and a "Smart Plug" that controls the power to the whole system. I have read the brochure and the instruction sheet for these units, but as a homeowner, I choose to have this installed by a professional (who currently services my hot-water heating system).
Now what the smart plug unit does is notices when hot water is being used and stores this information within itself for a week. It then runs the circulator at those times the next week. The thermistor tells the smart plug when hot water is being used. The use times are continuously updated automatically after that.
But I would like to know, in more detail, just how the smart plug actually works. I do not exactly want a wiring diagram that might be proprietary anyway, but I would like enough detail so I could tell the best way to make my usage patterns make the unit work best.
One way it might work is that it might have a little memory with 168 slots in it, one for each hour of the week, and it stores just whether the system was supplying hot water then. Then the next week, for those hours when hot water was demanded, the circulator would be switched on. It would be better if it switched on a few minutes before hot water was used so the water would be hot at the fixture when needed. I doubt this is actually how it is implemented, but I sure would like to know how it actually works.