Isolation Relay Thermostat

admin · Tuesday, October 11, 2022

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Thermostat displays isolation relay required on the screen please contact your service provider. You can find their contact information on the customer website or mobile app. When the thermostat calls for heat, it will energize the relay coil. The energized coil will close the contact in the relay between common (c, com, etc. ) and normally open (no).

The aprilaire 8024 24v relay card is a general purpose , three relay, 24 volt, dry contact switching device. Account & lists returns & orders. W1 connection at the nest base to the coil of the isolation relay tab. A white wire from the other isolation relay coil tab to the #2 screw connection on the taco zv. Typical maximum power for a household thermostat system is 15 va at 24 vac. You must use a device that can switch ac current. It should be sufficiently robust to withstand. If you have 3 wires at the thermostat, you don't need a isolation relay. The green wire would be the c charging wire that connects to one side of the transformer, the other end.