Thermostat Front Panel | Carrier 33CS220-FS, 33CS250-FS specification

BACKLIT

LCD DISPLAY

HEAT OR COOL

INDICATOR

(RED=HEAT,

MODEGREEN=COOL) BUTTON

OVERRIDE
BUTTON	UP AND DOWN
	BUTTONS

TEMPERATURE

SENSOR

Fig. 2 — Thermostat Front Panel

MODE BUTTON — The Mode button selects the operating mode of the thermostat.

•If OFF is selected, the thermostat will not enter Heating or Cooling mode.

•If HEAT is selected, the thermostat will only enter Heat- ing mode (if the room temperature is below the heating set point). The thermostat will not provide cooling.

•If COOL is selected, the thermostat will only enter Cool- ing mode (if the room temperature is above the cooling set point). The thermostat will not provide heating.

•If AUTO is selected, the thermostat will enter Heating or Cooling mode based on the room temperature and the heating and cooling set points. The thermostat will pro- vide 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 or cooling or cooling to heating operation.

→• If PROGRAM ON is selected, the thermostat will oper- ate as in the AUTO mode (see above). PROGRAM ON enables the thermostat to follow the programmed daily schedule stored in its memory.

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 simultaneously. The “Locked” icon will be removed from the display.

Set Clock — The Set Clock function allows the user to change the time and day displayed on the thermostat. Press and hold the Mode and Override buttons at the same time until the display changes. The display will show the setup annunciator. The current time will blink on and off. Press the UP ARROW or DOWN ARROW button until the correct time is shown. Hold down the buttons to quickly move through the time dis- play. The AM and PM annunciators will automatically change.

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To scroll through by hours instead of minutes, hold down the Override button while pressing UP ARROW or DOWN AR- ROW. To ensure the schedules are properly followed, make sure that AM or PM is correct for the time chosen. When the correct time is shown, press the Mode button to modify the day of the week. The current day will blink on and off. Press the UP ARROW or DOWN ARROW button until the correct day is shown. Press and hold the Mode and Override buttons at the same time again to exit the Set Clock mode.

Program Thermostat Schedules — Before pro- gramming the thermostat, plan the thermostat daily schedule. The schedule is divided into 7 days (Monday through Sunday). Each day has from 2 to 4 time periods (Occupied 1, Occu- pied 2, Occupied 3, Unoccupied) depending on the configura- tion of the thermostat. Each occupied time period has a start time, stop time, heating set point, and cooling set point. The un- occupied time period has a heating set point and a cooling set point. The unoccupied time period is active whenever an occu- pied time period is not active. Fill in Table 1 as an aid to pro- gramming the daily schedules.

PROGRAMMING MODE — To program the daily sched- ules, perform the following procedure:

1.Enter Programming mode by pressing and holding the Mode and UP ARROW buttons. The Occupied 1 annunciator will appear on the thermostat display. Use the UP ARROW or DOWN ARROW button to set the maximum number of Occupied periods for each day. The thermostat can be set to 1, 2, or 3. After the num- ber of Occupied periods has been selected, press the Mode button. See Fig. 3.

Fig. 3 — Setting Occupied 1 Set Points

2.The cooling set point for Occupied 1 will be displayed. Use the UP ARROW or DOWN ARROW button to raise or lower the cooling set point until the desired temperature is shown. The range of acceptable values is 35 to 99 F (1 to 37 C). Press the Mode button to continue. See Fig. 3.

3.The heating set point for Occupied 1 will be displayed. Use the UP ARROW or DOWN ARROW button to raise or lower the heating set point until the desired temperature is shown. The range of acceptable values is 35 to 99 F (1 to 37 C). Press the Mode button to continue. See Fig. 3.

4.The cooling set point for Unoccupied will be displayed. Use the UP ARROW or DOWN ARROW button to raise or lower the cooling set point until the desired tempera- ture is shown. The range of acceptable values is 35 to 99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied cooling). To configure the Unoccupied Cooling set point to OF, press the UP ARROW button until 99 F is displayed. Press the UP ARROW button again to display OF. Press the Mode button to continue.

5.The heating set point for Unoccupied will be displayed. Use the UP ARROW or DOWN ARROW button to raise or lower the heating set point until the desired tempera- ture is shown. The range of acceptable values is 35 to 99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied heating). To

33CS220-FS, 33CS250-FS specifications

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