Factory Defaults; Calibrate Sensor; Check Thermostat Operation - Carrier 33CS Installation And Operating Instructions Manual

11. The Copy command can be used to copy the previous
day's schedule if the schedules are the same. The copy
command becomes available after all the occupied
periods are programmed in a day. Use the UP ARROW
to change the copy command to YES. Use the DOWN
ARROW to change the copy command to NO. Press the
Mode button when the choice has been made. See Fig. 10.
If NO was selected, the schedule will automatically
change to the next day and the user must enter the
occupied and unoccupied schedules for that day.
NOTE: Occupied 1 schedule heating and cooling set
points are the same for each day. Occupied 2 and 3 set
points may be set to different values for each day of the
week.
If YES was selected, the schedule will be copied to the
next day. The schedule copy may be repeated until Sun-
day is reached. The Sunday schedule cannot be copied to
Monday.
12. After all the times and set points for each day have been
entered, press and hold the Mode and UP ARROW but-
tons to exit Programming mode.
NOTE: The thermostat will continue to follow the schedule
until a new one is entered.
If only one occupied schedule is selected, the Occupied 2
and 3 schedules are skipped. If the start time is set later in the
day than the stop time, the program will run from midnight of
that day to the stop time and then from the start time to
midnight. If the same start and stop times are programmed for
an occupancy schedule, the thermostat will be in Occupied
mode for 24 hours. If one occupied period starts or stops within
another occupied period, the lower numbered schedule has
priority. For example, if schedule Occupied 3 is running for
24 hours and Occupied 2 schedule comes on from 1 to 3 PM,
the set points from Occupied 2 are in effect from 1 to 3 PM.
OVERRIDING THE SCHEDULE — The normal time sched-
ule can be overridden by pressing and holding the FAN button
for 5 seconds during programmed, unoccupied periods. The
override feature may only be used when the thermostat is run-
ning the time schedule in Program On mode. Pressing and hold-
ing the FAN button for 5 seconds will temporarily force the
thermostat into Occupied 1 comfort settings for 1 to 6 hours.
The Override icon will be illuminated during this time. Pressing
and holding the FAN button, while the thermostat is currently
overriding the daily schedule, will reset the timer. The thermo-
stat will then return to the correct time period for the day.
Factory Defaults —
If the thermostat needs to be reset to
factory default settings, perform the following procedure:
1. Set thermostat mode to OFF.
2. Hold down the Mode button and press the DOWN
ARROW button simultaneously for 5 seconds. All of the
icons on the display screen will appear.
3. Press and hold the Fan button until Fd (factory defaults)
appears on the screen.
4. Press the Mode button twice to return to normal display.
NOTE: The occupied and unoccupied schedules will be reset.
The schedule will need to be re-entered.
Calibrate Sensor —
Every thermostat is
calibrated. Under normal circumstances there will never be a
need to re-calibrate the thermostat. If re-calibration must be
done, perform the following procedure:
1. Set thermostat mode to OFF.
2. Hold down the Mode and DOWN ARROW buttons for
5 seconds. All of the icons on the display screen will
appear. Release the buttons.
Fig. 8 — Setting Occupied 1 Set Points
Fig. 10 — Copy Command Display
3. Press the Mode button. The current temperature will be
displayed.
4. Use an accurate thermometer to measure room tempera-
ture. Press the UP or DOWN ARROW buttons until the
number equals room temperature.
5. Press the Mode button to return to normal operation.

Check Thermostat Operation

FOUR-PIPE OPERATION — To check thermostat opera-
factory-
tion with a 4-pipe system, perform the following procedure:
1. Turn on power to the fan coil unit.
2. Press the Mode button repeatedly until the Heat icon
appears on the display. The thermostat is now in Heating
mode.
3. Press the UP ARROW button until the heating set point is
10 F (6 C) higher than the current room temperature.
The hot water valve will open and the fan should be
energized.
8
Fig. 9 — Start Time Display