Honeywell RTH9580 Wi-Fi, User Manual, Page: 38 / 160

36
Setting system mode
1 Touch
SYSTEM
to display system settings.
2 Touch desired option:
Heat:
Thermostat controls only the
heating system.
Cool:
Thermostat controls only the
cooling system.
Off:
Heating/cooling systems are off.
Automatic: Thermostat selects heating
or cooling as needed depending on the
indoor temperature.
Emergency Heat (heat pumps
with aux. heat):
Controls auxiliary/
emergency heat. Compressor is locked
out.
3 Touch
Done
to save and exit.
Note:
The
Automatic
and
Emergency Heat
system settings may not appear, depending
on how your thermostat was installed.
SYSTEM
Done