IV. Thermostat Programming Buttons, Holiday Mode

will then return to Unoccupied mode. To increase the amount of time in Override mode, press the Override button again. Thirty minutes of override 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 override mode.

While in Override mode, the Override icon and the Occupied 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 Over- ride button is pressed, the thermostat will go into Un- occupied mode immediately. The thermostat will remain in Unoccupied mode until the next Occupied start time.

IV. THERMOSTAT PROGRAMMING BUTTONS

The thermostat has programming buttons which are used to change the set points of the thermostat, set the modes, and program schedules. The programming buttons are acces- sible from underneath the thermostat cover. To access the pro- gramming buttons, pull on the hinged thermostat cover. See Fig. 3. The programming buttons are: Mode, Fan, Holiday, Program, and Set Clock.

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.

Fig. 2 Ð Thermostat Front Panel Buttons

Fig. 3 Ð Thermostat Programming Buttons

A. 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 Override button. While holding down the Override button,

press the UP and DOWN ARROW buttons simultaneously. The ``Locked'' icon will appear on the display.

The thermostat is unlocked by performing the same proce- dure. Press and hold the Override button. While holding down the Override button, press the Up and Down Arrow buttons simultaneously. The ``Locked'' icon will be removed from the display.

B. Fan Button Operation

The Fan button selects fan operation. When the fan is set to FAN ON, the fan will run continuously 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 feature.

When the fan is not set to FAN ON (no icon displayed on ther- mostat screen), the fan will run during heating and cooling operation only.

C. Mode Button Operation

The Mode button selects the operating mode of the thermo- stat. If OFF is selected, the thermostat will not enter Heat- ing 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 Cooling mode based on the room tempera- ture and the heating and cooling set points. If PROGRAM ON is selected, the stored schedule is enabled and the ther- mostat will follow the Occupied and Unoccupied schedules stored in its memory.

Auto-Changeover

When the thermostat mode is set to AUTO, the thermostat will provide automatic changeover from Heating to Cool- ing 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 manu- ally changed from heating to cooling or cooling to heating operation.

D. Holiday Mode

The Holiday button places the thermostat into Holiday mode. During Holiday mode, the unoccupied set points are enforced. The number of days the thermostat will be in Holi- day mode can be set.

V. 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 current time will blink on and off. Press the UP ARROW and DOWN ARROW but- tons until the correct time is shown. Hold down the buttons

Fig. 4 Ð Setting the Clock

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