RTH7400/RTH7500 Series
15 69-2222ES—05
About your new thermostat
Use this feature in climates where both air conditioning and heating are used on the
same day. When the system mode is in Auto, the thermostat automatically selects
heating or cooling depending on the indoor temperature.
While in the Auto mode, if a schedule override takes place (temporarily or perma-
nently) the thermostat will automatically adjust the cooling and heating settings to
maintain a 3-degree separation between the cool and heat settings.
For example, if the heat temperature is raised to where it gets within 3-dgrees of the
cool setting, the display will show an up arrow next to “cool” to show the thermostat
is raising the cool setting up to maintain a 3-dgreee separation.
The display will also show both “Auto” and either “Heat” or “Cool” for which tempera-
ture setting you are currently adjusting. Press the system button to select between
the heat and cool to view/adjust either mode.
Auto Changeover
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