Auto Changeover; Operating The Thermostat - Robertshaw RS5220C User Manual

Auto Changeover

Auto changeover is the ability of the thermostat to switch automatically
between heating settings and cooling settings. This is useful in Spring
and Fall when the days are warm and the nights are cool. In heat mode
if the room continues to warm beyond a set threshold the thermostat
switches to the cool mode and the associated cooling settings. The
reverse is also true.
As the room temperature changes, the thermostat will call for heating or
cooling as needed. To prevent the heating and cooling systems from
overriding each other, an auto changeover deadband is used.
The deadband is the minimum temperature swing before changing from
heating to cooling or vice versa. The larger the deadband the more the
room temperature will vary.

Operating the Thermostat

Any setting can be changed when it is flashing by pushing or
If a button is not pushed for 10 seconds the thermostat returns
to operation.
The following buttons can be accessed from the front panel.
START/STOP SCHEDULE: Switches between running a schedule and
manual (permanent override). Cancels a temporary override.
EDIT SCHEDULE: Use this button to start editing the schedule. Push
repeatedly to move through the selections.
VACATION: Used to set a temporary setpoint for a number of days.
SET TIME: Sequences through the hour, minute and day.
LIGHT BAR: Turns on the display back light for 10 seconds.
FAN: Turns fan to AUTOMATIC, CIRCULATE or ON.
UP ARROW: Raises the setpoint or increases flashing item.
DOWN ARROW: Lowers the setpoint or decreases flashing item.
HEAT/COOL: Toggles through OFF, HEATING, COOLING, and AUTO.
If configured as HP then emergency heat is also displayed.
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