Honeywell RTH8500 Wi-Fi Serie Guia Del Usuario página 52

Auto changeover
This feature is used in climates where both
air conditioning and heating are used on the
same day.
When the system is set to AUTO,
the thermostat automatically
selects heating or cooling
depending on the indoor temperature.
Heat and cool settings must be at least
3 degrees apart. The thermostat will
automatically adjust settings to maintain this
3-degree separation.
Note:
System setting function 0300 controls
Auto changeover. See "Manual/Auto
Changeover" on page 56.
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