DCN 141-01128-04 10/6/08
9
Thermostat Control Screen
Mode Button Operation
Off Mode: System is off. No heating or cooling will come on. If system was on, it will turn off.
Heat Mode: Only heating will occur.
Cool Mode: Only cooling will occur.
Auto Mode: Heating or cooling will come on according to the heating and cooling setpoints. The
system will automatically switch between heating and cooling when the temperature exceeds the
appropriate setpoints.
EHEAT Mode: Emergency Heat mode is only displayed when Heat Pump HVAC System type is
selected. When there is a compressor failure with the heat pump system, setting the mode to EHEAT
will allow the supplemental heat to come on whenever there is a heat call to provide heating. It also
disables the compressor outputs to prevent further damage to the system.
FAN Button
The FAN button controls the HVAC system’s MANUAL fan. The current manual fan mode is displayed
above the button. Normally this button is in the Auto mode (the system fan is automatically controlled by
HVAC system). Pressing the FAN button once will turn the manual fan operation ON. Pressing it again will
turn the manual fan OFF and return to the AUTO mode (under control of the HVAC system).
Fan Button
Auto
On
*Cycle
*If the Fan Cycler feature is enabled the additional fan mode “Cycle” will be available
RUN/HOLD Button
The RUN/HOLD button controls the automatic SCHEDULE operation. In the HOLD mode, the current
temperature is maintained until changed by manual or remote network command. In the Run mode, the
schedule loaded into the thermostat is activated and setpoints will change according to the schedule and
the time and day of week.
Run Button
Run
Hold
RUN
AUTO
FAN
OFF
MODE
MENU
RUN
AUTO
FAN
OFF
MODE
MENU