6
Check Thermostat Operation —
To check thermo-
stat operation, perform the following procedure:
1. Press the Mode button repeatedly until the Heat icon
appears on the display. The thermostat is now in Heating
mode.
2. Press the Fan button. The Fan Auto icon will appear on
the display screen. Press the UP ARROW button until the
heating set point is 10 F (6 C) higher than the current
room temperature. Heating and fan should be energized.
3. Press the Mode button repeatedly until the Cool icon
appears on the display. The thermostat is now in Cooling
mode.
4. Press the DOWN ARROW button until the cooling set
point is 10 F lower than the current room temperature.
Cooling and fan should be energized.
5. Press the Mode button repeatedly until the Off icon
appears. Press the Fan button until the display reads Fan
On. The fan should energize.
6. If heating, cooling, or fan operation do not work, check
wiring and consult Table 4.
Final Checklist
1. Put away tools and instruments. Clean up debris and
packaging.
2. Review Owner’s Guide with occupant or owner.
3. Leave the manuals with owner.
OPERATION
The Mode button selects the operating mode of the thermo-
stat. 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 heat-
ing set point). If COOL is selected, the thermostat will only
enter Cooling mode (if the room temperature is above the cool-
ing set point). If AUTO is selected, the thermostat will enter
Heating or Cooling mode based on the room temperature and
the heating and cooling set points. If PROGRAM ON is select-
ed, the stored schedule is enabled and the thermostat 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 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 heating operation.
Two-Stage Operation —
The second stage of heat or
cool is turned on when the first stage has been on for a mini-
mum of 2 minutes and the temperature differential from the set
point is equal to or greater than the set point plus the deadband
plus 2 degrees.
Clock Backup —
In the event of a power loss, the ther-
mostat will keep time for a minimum of 48 hours without
external power or batteries.
Fan Operation —
If Fan On is selected, the fan will run
continuously during occupied schedule (except when Mode is
switched to OFF). The fan will be off during unoccupied
schedule except during heating or cooling operation.
If Fan On is not selected, the fan will only operate during
heating or cooling operation.
Emergency Heat —
Emergency heat is available for
heat pump applications. To turn on emergency heat, press and
hold the Fan button. While holding the Fan button, press the
UP button for 2 seconds. An ‘‘EH’’ will be displayed. During
emergency heat, the fan will operate and the second stage of
heat will be energized (locking out the first stage compressor).
To exit emergency heat, press and hold the Fan button. While
holding the Fan button, press the UP button for 2 seconds. Dur-
ing emergency heat, only OFF and HEAT modes are available.
Holiday Mode —
When the thermostat is in Holiday
mode, the thermostat will operate under Unoccupied set points.
To configure and activate the Holiday mode, press the Holiday
button. The ‘‘HOL’’ icon will be displayed along with the re-
maining days of Holiday mode operation. Press the UP or
DOWN ARROWS to select the number of days that the holi-
day schedule will be in effect. A value of 0 disables Holiday
mode. The duration can be set from 1 to 99 days. The thermo-
stat will enter Holiday mode on midnight of the next day after
the mode has been activated. Holiday mode will remain in ef-
fect until midnight of the last configured day.
If the Holiday mode is in effect, the number of days remain-
ing will blink on and off and the ‘‘Unoccupied’’ icon will be
displayed. The Override button will be active during Holiday
mode.
To turn off the Holiday mode before the remaining config-
ured days have passed, press the Holiday button to enter the
Configuration mode. Press the DOWN ARROW to set the
number of days to zero. Holiday mode will be disabled.
Keypad Lock —
To prevent unauthorized use of the ther-
mostat, the front panel buttons can be disabled. To disable or
lock the keypad, press and hold the Mode button. While hold-
ing down the Mode 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 Mode button. While holding down the
Mode button, press the UP and DOWN ARROW buttons si-
multaneously. The ‘‘Locked’’ icon will be removed from the
display.
