Override Button; Thermostat Inner Panel Buttons; Mode Button Operation; Emergency Heat Button - Carrier 33CS071-01 Owner's Manual

OVERRIDE BUTTON — The Override button is used to
force the thermostat from Unoccupied mode into the Occu-
pied mode comfort settings when used with dry contacts and
an external device. The Override period will be set at 30 min-
utes. The thermostat 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 Overrided 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 Oc-
cupied icon will be displayed on the thermostat. The time of
day and the minutes remaining in Override mode will al-
ternate on the thermostat display.
The set points are adjustable with the UP ARROW and
DOWN ARROW keys during Override mode.
Thermostat Inner Panel Buttons —
stat has inner panel buttons which are used to change the
configuration of the thermostat, set the mode, and reset the
filter. The buttons are accessible from underneath the ther-
mostat cover. To access the inner panel buttons, pull on the
hinged thermostat cover. See Fig. 3. The programming but-
tons are: Mode, Fan, Emergency Heat, Backlight, and Reset
Filter.
The UP ARROW and DOWN ARROW buttons are used
to choose configuration settings. The buttons are also used
to answer yes or no.
MODE BUTTON OPERATION — The Mode button se-
lects the operating mode of the thermostat. If OFF is se-
lected, 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
Cooling mode based on the room temperature and the heat-
ing and cooling set points.
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.
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 (with
Dry Contact Switch), the fan will run only during heating or
cooling operation, even if the fan is set to FAN ON.
When the fan is not set to FAN ON (no icon displayed on
thermostat screen), the fan will run during heating and cool-
ing operation only.
EMERGENCY HEAT BUTTON — Emergency heat is avail-
able for heat pump applications. To turn on emergency heat,
press the Emerg. Heat 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 emergency heat, press the Emerg. Heat
button. During emergency heat, only OFF and HEAT modes
are available.
Fig. 2 — Thermostat Front Panel Buttons
The thermo-
BACKLIGHT BUTTON — The Backlight button is used to
change the setting of the Backlight display. If the configu-
ration is set to Yes, the backlight will be lit continuously. If
the configuration is set to No, the display will be lit only
after a button is pushed. The display will stay lit until action
has ceased.
RESET FILTER BUTTON — The Reset Filter button is used
by the service person to reset the Service Filter icon display.
If the Reset Filter button is pressed during normal ther-
mostat operation, the number of hours of fan operation is
displayed.
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 key-
pad, press and hold the Mode button. While holding 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 pro-
cedure. 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.
2
Fig. 3 — Thermostat Inner Panel Buttons