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How to control additional radiant zones?

BigErlBigErl Posts: 26Member
Hello everyone. I am looking to add 2 and later maybe a third radiant zone to my existing system. Currently I have a Triangle Tube Solo 60 with the Trimax Control. It’s set up primary/secondary with a Caleffi Sep4. I’ve got a primary pump, a secondary pump and a DHW pump all wired through the boiler. The house is one zone controlled by one thermostat. It’s an old gravity system converted to pumped. For the new zones I plan on adding pumps and taco i series valves. I’m looking for recommendations on how to power and control these new pumps and ivalves and if I use a multi pump relay will I have to “unwire” my existing pumps from the boiler to the relay?
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