Carrier 33CS250 FS Thermostat User Manual

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Debonair®

3CS

Flush-Mounted Flatstat

Commercial Programmable Thermostat

Owner’s Manual

Part Number 33CS250-FS and 33CS220-FS

lower the desired set point, change the mode, program, and

IMPORTANT: Read entire instructions before program-

ming the thermostat.

override the current program. See Fig. 2.

→

SET POINT BUTTONS — The UP ARROW and DOWN

ARROW buttons will raise or lower the current desired tem-

perature 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 ad-

just only the heating set points.

OVERRIDE BUTTON — The Override button is used to

force the thermostat from Unoccupied mode into the Occu-

pied 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 over-

ride 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.

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 peri-

od. Each thermostat stores programs for 7 independent days.

Batteries are not required. During power interruption the inter-

nal 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

While in Override mode, the Override icon and the Occu-

pied 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.

(

changing set points, changing programming sched-

ules), the thermostat security level may be config-

ured to exclude those functions. Call the installer to

reconfigure the security level.

CONFIGURATION

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.

→

Thermostat Display — The thermostat display is locat-

ed in the center of the thermostat. See Fig. 1. The following in-

formation 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 thermo-

Fig. 1 — Thermostat Display

stat has buttons on the front cover which are used to raise or

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

PC 111 Catalog No. 533-353 Printed in U.S.A. Form 33CS-13SO Pg 1 105 11-00 Replaces: New

Book 1

Tab 11a 13a

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.

BACKLIT

LCD DISPLAY

HEAT OR COOL

INDICATOR

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.

(

RED=HEAT,

MODE

BUTTON

GREEN=COOL)

OVERRIDE

BUTTON

UP AND DOWN

BUTTONS

PROGRAMMING MODE — To program the daily sched-

ules, perform the following procedure:

TEMPERATURE

SENSOR

. 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. 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.

•

Fig. 3 — Setting Occupied 1 Set Points

. 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

→

•

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.

(1 to 37 C). Press the Mode button to continue. See Fig. 3.

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.

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.

. 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.

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.

. 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

105

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.

. 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.

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

UP ARROW or DOWN ARROW button to raise or low-

er the time until the desired Start Time is shown. Press the

Mode button to continue. See Fig. 4.

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

UP ARROW or DOWN ARROW button to raise or low-

er the time until the desired Stop Time is shown. Press the

Mode button to continue.

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 mid-

night. 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 an-

other occupied period, the lower numbered schedule has priori-

ty. 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.

. 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.

1. 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 peri-

ods 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.

Fig. 4 — Start Time Display

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.

2. 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.

Fig. 5 — Copy Command Display

NOTE: The thermostat will continue to follow the schedule

until a new one is entered.

Table 1 — Daily Schedule Planner

SCHEDULE

DAY OF

THE WEEK

Occupied 1

Start / Stop / Heat / Cool

Occupied 2

Start / Stop / Heat / Cool

Occupied 3

Start / Stop / Heat / Cool

Unoccupied

Start / Stop / Heat / Cool

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Sunday

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

105

OPERATION

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 Program-

ming mode. Press the Override button to enter Holiday Pro-

gramming 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 Holi-

day mode. The duration can be set from 1 to 99 days. The ther-

mostat 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 remain-

ing 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 config-

ured 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 Program-

ming mode. Press the DOWN ARROW to set the number of

days to zero. Holiday mode will be disabled.

→

The Mode button selects the operating mode of the thermo-

stat. 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 heat-

ing set point). If COOL is selected, the thermostat will only en-

ter Cooling mode (if the room temperature is above the cooling

set point). If AUTO is selected, the thermostat will enter Heat-

ing 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 mini-

mum 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.

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.

Clock Backup — In the event of a power loss, the ther-

mostat 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.

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.

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 com-

pressor). 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.

NOTE: This feature is configured by the installer.

→ Outside Temperature Sensor (33CS250-FS

Only) — An optional outside temperature sensor may be pro-

vided 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.

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 heat-

ing applications. Do not use with gas heat.

105

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

Book 1

PC 111 Catalog No. 533-353 Printed in U.S.A. Form 33CS-13SO Pg 8 105 11-00 Replaces: New

Tab 11a 13a

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