OVERRIDE BUTTON — The Override button is used to
force the thermostat from Unoccupied mode into the Occu-
pied 1 mode comfort settings. The Override period will be set
at 30 minutes. To increase the amount of time in Override
mode, press the Override button again. Thirty minutes of over-
ride time will be added for each time the Override button is
pressed up to a maximum of 4 hours. After the 4-hour limit has
been reached, press the Override button again to cancel over-
While in Override mode, the Override icon and the Occu-
pied 1 icon will be displayed on the thermostat. The time of
day and the minutes remaining in Override mode will alternate
on the thermostat display.
The set points are adjustable with the UP ARROW and
DOWN ARROW keys during Override mode.
NOTE: If the thermostat is in Occupied mode and the Override
button is pressed, the thermostat will go into Unoccupied mode
immediately. The thermostat will remain in Unoccupied mode
until the next Occupied start time.
The thermostat is unlocked by performing the same proce-
dure. Press and hold the Mode button. While holding down the
Mode button, press the Up and Down Arrow buttons simulta-
neously. The ‘‘Locked’’ icon will be removed from the display.
FAN BUTTON OPERATION — The Fan button selects fan
operation. When the fan is set to FAN ON, the fan will run con-
tinuously for improved air circulation.
NOTE: When the thermostat is in Unoccupied mode, the fan
will run only during heating or cooling operation, even if the
fan is set to FAN ON; this is the energy-saving smart fan
When the fan is not set to FAN ON (no icon displayed on
thermostat screen), the fan will run during heating and cooling
MODE BUTTON OPERATION — The Mode button se-
lects the operating mode of the thermostat. If OFF is selected,
the thermostat will not enter Heating or Cooling mode. If
HEAT is selected, the thermostat will only enter Heating mode
(if the room temperature is below the heating set point).
If COOL is selected, the thermostat will only enter Cooling
mode (if the room temperature is above the cooling set point).
If AUTO is selected, the thermostat will enter Heating or Cool-
ing mode based on the room temperature and the heating and
cooling set points. If PROGRAM ON is selected, the stored
schedule is enabled and the thermostat will follow the Occu-
pied and Unoccupied schedules stored in its memory.
Thermostat Programming Buttons — The thermo-
stat has programming buttons which are used to change the set
points of the thermostat, set the modes, and program schedules.
The programming buttons are accessible from underneath the
thermostat cover. To access the programming buttons, pull on
the hinged thermostat cover. See Fig. 3. The programming
buttons are: Mode, Fan, Holiday, Program, and Set Clock.
Auto-Changeover — When the thermostat mode is set to
AUTO, the thermostat will provide automatic changeover from
Heating to Cooling mode and Cooling to Heating mode when
required. The thermostat will automatically switch to maintain
the desired temperature setting. The thermostat does not need
to be manually changed from heating to cooling or cooling to
HOLIDAY MODE — The Holiday button places the thermo-
stat into Holiday mode. During Holiday mode, the unoccupied
set points are enforced. The number of days the thermostat will
be in Holiday mode can be set.
The UP ARROW and DOWN ARROW buttons are used to
scroll through programming set points. The buttons are also
used to answer yes or no.
KEYPAD LOCK — The thermostat has a keypad lockout
feature which will not acknowledge front panel buttons until
the lockout sequence is entered. To disable or lock the keypad,
press and hold the Mode button. While holding down the Mode
button, press the UP and DOWN ARROW buttons simulta-
neously. The ‘‘Locked’’ icon will appear on the display.
Set Clock — The Set Clock button allows the user to
change the time and day displayed on the thermostat. Press the
Set Clock button to enter Set Time mode. See Fig. 4. The cur-
rent time will blink on and off. Press the UP ARROW and
DOWN ARROW buttons until the correct time is shown. Hold
down the buttons to quickly move through the time display.
The AM and PM annunciators will automatically change. To
scroll through by hours only, press and hold down the Fan
button while pressing the UP or DOWN ARROW buttons. To
ensure the schedules are properly followed, make sure that
AM or PM is correct for the time chosen. When the correct
time is shown, press the Mode/Next button to modify the day
of the week. The current day will blink on and off. Press the UP
ARROW and DOWN ARROW buttons until the correct day is
shown. Press the Set Clock button again to exit the Set Time
Fig. 2 — Thermostat Front Panel Buttons
Fig. 3 — Thermostat Programming Buttons
Fig. 4 — Setting the Clock