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. If heating, cooling, or fan operation do not energize, check
wiring and consult Table 4.
X. 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 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.
I. 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 ther-
mostat will automatically switch to maintain the desired tem-
perature setting. The thermostat does not need to be manu-
ally changed from heating to cooling or cooling to heating
operation.
II. TWO-STAGE OPERATION
The second stage of heat or cool is turned on when the first
stage has been on for a minimum of 2 minutes and the tem-
perature differential from the set point is equal to or greater
than the set point plus the deadband plus 2 degrees.
III. CLOCK BACKUP
In the event of a power loss, the thermostat will keep time
for a minimum of 48 hours without external power or
batteries.
IV. 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.
V. EMERGENCY HEAT
Emergency heat is available for heat pump applications. This
option is only available if Advanced Setup Step 5 (Heat Pump)
is set to ON. To turn on emergency heat, press and hold the
Override button. While holding the Override button, press
the UP button. 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 emer-
gency heat, press and hold the Override button. While hold-
ing the Override button, press the UP button. During emer-
gency heat, only OFF and HEAT modes are available.
VI. ELECTRIC HEAT
When the Electric Heat option in the advanced setup is set
to ON (configured by installer), the thermostat will turn on
the fan immediately any time there is a heat demand. This
feature should only be used on electric heating applications.
Do not use with gas heat.
VII. KEYPAD LOCK
To prevent unauthorized use of the thermostat, the front panel
buttons can be disabled. To disable or lock the keypad, press
and hold the Mode button. While holding down the Mode but-
ton, press the UP and DOWN ARROW buttons simulta-
neously. 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
simultaneously. The ‘‘Locked’’ icon will be removed from the
display.
—6—
