9
Step 1. Power Off the HVAC System
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in injury or death.
Before installing thermostat, turn off all power to equipment.
There may be more than one power disconnect.
!
WARNING
Power off the HVAC system either by a switch at the indoor furnace or
fan coil or at the circuit breaker box.
Verify that the equipment is off by attempting to adjust the temperature
with the existing thermostat. The thermostat may show the temperature
change but your cooling or heating should not come on.
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