Debonair®

33CS

Flush-Mounted Flatstat

Commercial Programmable Thermostat

Owner’s Manual

Part Number 33CS250-FS and 33CS220-FS

IMPORTANT: Read entire instructions before programming the thermostat.

GENERAL

Carrier’s 7-day, commercial, programmable thermostats are flat, wall-mounted, low-voltage thermostats which maintain room temperature by controlling the operation of an HVAC

(Heating, Ventilation and Air Conditioning) system. Separate heating and cooling set points and auto-changeover capability allow occupied and unoccupied programming schedules for energy savings.

All thermostats allow up to 3 occupied and one unoccupied time/temperature settings to be programmed per 24-hour period. Each thermostat stores programs for 7 independent days.

Batteries are not required. During power interruption the internal NEVERLOST™ memory stores programmed schedules for an unlimited amount of time.

IMPORTANT: The thermostat has a configurable security level. If certain functions are not available

(changing set points, changing programming schedules), the thermostat security level may be configured to exclude those functions. Call the installer to reconfigure the security level.

CONFIGURATION

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Thermostat Display —

The thermostat display is located in the center of the thermostat. See Fig. 1. The following information can be displayed on the screen:

• mode (OFF, HEAT, COOL, AUTO, or PROGRAM ON)

• fan setting (FAN ON or blank for Fan Auto operation)

• override indication

• room temperature

• desired temperature

• service filter indicator

• time of day

• day of the week

• schedule period (Occupied 1, 2, or 3; or Unoccupied)

• setup indicator (Programming mode)

• lock indicator

• start/stop indicator (schedule period program mode)

Heat or Cool Indicator —

A Heat or Cool indicator is located in the middle of the thermostat. See Fig. 2. The light will be red if the thermostat is in Heating mode. The light will be green if the thermostat is in Cooling mode.

Thermostat Front Panel Buttons —

The thermostat has buttons on the front cover which are used to raise or lower the desired set point, change the mode, program, and override the current program. See Fig. 2.

→ SET POINT BUTTONS — The UP ARROW and DOWN

ARROW buttons will raise or lower the current desired temperature set point. If the thermostat is in the AUTO or Program mode, pressing the UP ARROW or DOWN ARROW button will adjust both the heating and cooling set points. Pressing the

UP ARROW or DOWN ARROW button in Cooling mode will adjust only the cooling set points. Pressing the UP AR-

ROW or DOWN ARROW buttons in Heating mode will adjust only the heating set points.

→ OVERRIDE BUTTON — The Override button is used to force the thermostat from Unoccupied mode into the Occupied 1 mode comfort settings. The Override period will be set at 30 minutes. The thermostat will then return to the program for that time period. 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 Override 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 Occupied 1 icon will be displayed on the thermostat. The time of day and the minutes remaining in Override mode will alternate on the thermostat display.

The set points are adjustable with the UP ARROW and

DOWN ARROW keys during Override mode.

NOTE: If the thermostat is in Occupied mode and the Override button is pressed, the thermostat will go into Unoccupied mode immediately. The thermostat will remain in Unoccupied mode until the next Occupied start time.

Fig. 1 — Thermostat Display

Book 1

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

4 PC 111 Catalog No. 533-353 Printed in U.S.A.

Form 33CS-13SO Pg 1 105 11-00 Replaces: New

Tab 11a 13a

MODE

BUTTON

OVERRIDE

BUTTON

BACKLIT

LCD DISPLAY

HEAT OR COOL

INDICATOR

(RED=HEAT,

GREEN=COOL)

UP AND DOWN

BUTTONS

TEMPERATURE

SENSOR

Fig. 2 — Thermostat Front Panel

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

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• 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 heating set point). The thermostat will not provide cooling.

• If COOL is selected, the thermostat will only enter Cooling 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 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 or cooling or cooling to heating operation.

• If PROGRAM ON is selected, the thermostat will operate 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 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 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 procedure. 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 display. 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 programming 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, Occupied 2, Occupied 3, Unoccupied) depending on the configuration of the thermostat. Each occupied time period has a start time, stop time, heating set point, and cooling set point. The unoccupied time period has a heating set point and a cooling set point. The unoccupied time period is active whenever an occupied time period is not active. Fill in Table 1 as an aid to programming the daily schedules.

PROGRAMMING MODE — To program the daily schedules, 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 number 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 temperature 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 temperature is shown. The range of acceptable values is 35 to

99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied heating). To

configure the Unoccupied Heating set point to OF, press the DOWN ARROW button until 35 F is displayed. Press the DOWN ARROW button again to display OF. Press the Mode button to continue.

6. The day of the week will be shown. Use the UP ARROW or DOWN ARROW button to change the day of the week until the desired starting day is shown. Possible choices are Mo (Monday) through Su (Sunday). Press the

Mode button when the desired day is shown.

7. The Start Time for Occupied 1 will be displayed. Use the

UP ARROW or DOWN ARROW button to raise or lower the time until the desired Start Time is shown. Press the

Mode button to continue. See Fig. 4.

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8. The Stop Time for Occupied 1 will be displayed. Use the

UP ARROW or DOWN ARROW button to raise or lower the time until the desired Stop Time is shown. Press the

Mode button to continue.

9. The On/Off icon will be displayed. Use the UP ARROW to turn the Occupied 1 period ON for this day. Use the

DOWN ARROW to turn the Occupied 1 period OFF for this day.

10. If more than one occupied period has been selected in

Step 1, repeat Steps 2 through 9 to program the remaining schedule for Occupied periods 2 and 3.

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. 5.

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

Sunday 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 buttons 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 schedule can be overridden by pressing the UP or DOWN ARROW button to change the desired temperature. The thermostat will use the new set point until the next scheduled time period starts.

Fig. 4 — Start Time Display

Fig. 5 — Copy Command Display

Table 1 — Daily Schedule Planner

DAY OF

THE WEEK

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

SCHEDULE

Occupied 1 Occupied 2 Occupied 3 Unoccupied

Start / Stop / Heat / Cool Start / Stop / Heat / Cool Start / Stop / Heat / Cool Start / Stop / Heat / Cool

/ / / / / / / / / / / /

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

Sunday / / / / / / /

NOTE: The cooling temperature set point must be higher than the heating temperature set point.

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/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

/

3 105

OPERATION

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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 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 heating and cooling set points. If PROGRAM ON is selected, the thermostat will operate as in the AUTO mode and the stored schedule is enabled. 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 minimum 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 thermostat 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 schedules (except when Mode is switched to OFF). The fan will be off during the 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 Override button. While holding the Override button, press the UP ARROW 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 and hold the Override button. While holding the Override button, press the UP

ARROW button. During emergency heat, only OFF and HEAT modes are available.

Electric Heat —

When the Electric Heat option in the advanced set up 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.

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 Mode and UP ARROW buttons simultaneously to enter Programming mode. Press the Override button to enter Holiday Programming mode. The ‘‘HOL’’ icon will be displayed along with the remaining days of Holiday mode operation. Press the

UP or DOWN ARROWS to select the number of days that the holiday schedule will be in effect. A value of 0 disables Holiday mode. The duration can be set from 1 to 99 days. The thermostat will enter Holiday mode on midnight of the next day after the mode has been activated. Holiday mode will remain in effect until midnight of the last configured day.

If the Holiday mode is in effect, the number of days remaining will blink on and off and the ‘‘Unoccupied’’ icon will be displayed. The Override button will be active during Holiday mode. The Dry Contact Switch is ignored.

To turn off the Holiday mode before the remaining configured days have passed, press the Mode and UP ARROW buttons simultaneously for 2 seconds to enter Programming

Mode. Press the Override button to enter Holiday Programming mode. Press the DOWN ARROW to set the number of days to zero. Holiday mode will be disabled.

Dry Contact Switch (33CS250-FS Only) —

A dry contact switch is provided to allow an external device to force the thermostat into Occupied 1 mode. When the thermostat is forced into Occupied 1 mode via the dry contact closure, the

Occupied 1 icon will blink each second.

SOFT START — When multiple thermostats are controlled by the same external device, a Soft Start option can be used to stagger the turn on times of the HVAC equipment. This feature may cause a delay in operation after entering Occupied 1 mode.

Remote Temperature Sensor (33CS250-FS

Only) —

A remote temperature sensor is available to read the temperature from a space. If a remote temperature sensor is connected and the thermostat is configured to use a remote temperature sensor, then the thermostat will ignore the reading of its internal sensor and control to the reading of the remote temperature sensor. When the thermostat is using a reading from a remote sensor, the degree symbol above the temperature reading will blink.

NOTE: This feature is configured by the installer.

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Outside Temperature Sensor (33CS250-FS

Only) —

An optional outside temperature sensor may be provided to sense outdoor-air temperature. Press and hold the

Mode button for 5 seconds to display outdoor-air temperature.

The “outside” temperature annunciator will be displayed. Press the Mode button again to exit the Outside Temperature display.

105 4

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6

Copyright 2000 Carrier Corporation

Book 1

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

4 PC 111 Catalog No. 533-353 Printed in U.S.A.

Form 33CS-13SO Pg 8 105 11-00 Replaces: New

Tab 11a 13a