11
REMOVING YOUR OLD THERMOSTAT (CONT.)
3. Check for compatibility
Inspect the wires leading into the backplate.
If you find thick wires with wire nuts, or if the voltage of your HVAC system is 120V or higher, then your system
is not compatible with this smart thermostat. [Figure 1.3]
Contact Customer Support (see page 57).
Figure 1.3
or
120V
OR
HIGHER