Preparing to install the Zen Thermostat

  1. Safety check. The thermostat works on low voltage systems rated at 24 volts, with maximum current of 2 Amps per relay
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  2. Turn off the HVAC power. Turn off the power to your HVAC from the breaker box or HVAC power switch
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  3. Remove cover from old unit. Remove your thermostat’s cover to expose the wiring.
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  4. Take a picture of the wiring. Make sure to take a picture of the wiring with all the wires clearly visible and the labels on the thermostat terminals readable.
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