User's Manual

3
HVAC System Compatibility Information
The Legacy Line Wi--Fi Thermostat is designed to operate with
low-- voltage heating and cooling systems. It is not designed for use with
line--voltage or millivolt heating and cooling systems.
The Legacy Line Wi-- Fi Thermostat supports:
d Up to 2 heat and 2 cool stages on a conventional system.
d Up to 3 heat and 2 cool stages on a heat pump system.
The Legacy Line Wi --Fi Thermostat supports the following equipment:
Equipment Supported?
Gas / Oil / Electric heating
(uptotwostages)
YES
Heat pump with auxiliary heat
(up to three stages)
YES
Geothermal Heat Pump YES
Dual fuel systems YES
Standard electric cooling
(uptotwostages)
YES
Boilers YES