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Keeping circulators always on in unattended home to prevent freeze damage
We're going to be leaving our old house empty for a good part of the winter with the heat set to a fixed temp of 58.
There has been a history of freezes within the hot water baseboard elements when it gets windy and super duper cold out. I have an infrared thermometer and have always found the freeze and thawed it with a hair dryer. I'd like a neighbor to be able to turn the circulators on when it's like that outside to prevent water from freezing in the thin baseboard finned pipe.
It's a multizone system so I can't just run the same hot line to each circulator.
Can I feed, via individual switches, 120 volts to the each line side leading to the circulator within a Taco SR504EXP to keep the motors running all the time? Will that damage the board at all? Is there an easier way to keep the circulators always on?