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OWNER’S  
MANUAL  
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P // N33CS 44 50 -- 01  
DIGITAL  
IGITAL  
THERMOSTAT  
7-DAY  
PROGRAMMABLE  
HEAT  
I2:00Pm  
Su  
HEAT  
74  
COOL  
COOL  
AUTO  
&
PUMP  
HEAT  
72  
3
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2
Adjustable2nd&3rdStage  
Timers&Deadbands  
BacklitDisplay&Button  
Legends  
AcceptsEZProgrammer  
RemoteAveraging  
AuxHeatIndicator  
DryContactEquipped  
OutdoorSensorReadywith  
ProgrammableOutput  
LightActivationEquipped  
High/LowReadoutsfortheDay AcceptsOptionalHumidityModule:  
SetPointLimiting  
ControlsHumidification,  
EconomizerControl  
DehumidificationandReheat  
PreoccupancyFanPurge  
AcceptsOptionalIRRemoteControl  
Accepts the OPTIONAL  
HUMIDITY MODULE  
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage  
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.  
Carrier Corporation 04/06  
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Carrier  
CAUTION  
Follow the Installation Instructions before proceeding.  
Set the thermostat mode to “OFF” prior to changing  
settings in setup or restoring Factory Defaults.  
CAUTION  
NEVER PUT MORE THAN ONE  
JUMPER ON THE SAME MISC  
JUMPER BLOCK!  
THIS MAY DAMAGE YOUR  
THERMOSTAT.  
MISC3  
MISC3  
OK  
NOTE: Due to variations in environmental conditions, it is not  
always possible to achieve the desired humidification or  
dehumidification setpoint.  
This device complies with Part 15 of the FCC Rules. Operation is  
subject to the following two conditions: (1) this device may not cause  
harmful interference, and (2) this device must accept any interference  
received, including interference that may cause undesired operation.  
Thermostat  
33CS450-01  
Tested to Comply  
c
with FCC Standards  
FC  
FOR HOME OR OFFICE USE  
4Z95  
Page i  
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Carrier  
The Table of Contents divides the thermostat features into sections  
making it easier to quickly find information.  
The first page of each section contains a more detailed list of the contents  
within that section, such as the example page shown below.  
SECTION 14  
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Header shows section #  
and title of section  
Section 14 Contents:  
Adjusting the Heat/Cool  
Differential..............................14.2  
Adjusting the Cycles  
Per Hour..................................14.3  
Adjusting the Deadband..........14.4  
Adjusting the Minutes of  
Section contents  
Run-Time Before the  
14  
Next Stage...............................14.6  
Selecting 2nd Stage Turn  
Visible section tab  
on the side of the  
page  
Off Temperature.....................14.7  
Section and page #  
Page 14.1  
In addition, this manual also has an Index to help you find any information  
regarding this thermostat quickly.  
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Auto-Changeover: A mode in which the thermostat will turn on  
the heating or cooling based on room temperature demand.  
Configurable Output Jumper: Using jumpers on the thermostat  
you can configure the MISC1, MISC2, and MISC3 terminals to  
control humidification, dehumidification, 2nd stage cooling, 3rd  
stage heating, and a programmable output.  
Cool Setpoint: The warmest temperature that the space should  
rise to before cooling is turned on (without regards to  
deadband).  
Deadband: The number of degrees the thermostat will wait, once  
setpoint has been reached, before energizing heating or cooling.  
Dehumidify: To reduce the amount of moisture in the air.  
Differential: The forced temperature difference between the  
heat setpoint and the cool setpoint.  
Heat Setpoint: The coolest temperature that the space should  
drop to before heating is turned on (without regards to  
deadband).  
Humidify: To increase the amount of moisture in the air.  
Icon: The word or symbol that appears on the thermostat  
display.  
Mode: The current operating condition of the thermostat (i.e. Off,  
Heat, Cool, Auto, Program On).  
Non-Programmable Thermostat: A thermostat that does not  
have the capability of running the Time Period Programming.  
Programmable Thermostat: A thermostat that has the capability  
of running the Time Period Programming.  
Reheat: Running the cooling and 2nd stage strip heaters at the  
same time in order to dehumidify the air without cooling down  
the room temperature.  
Temperature Swing: Same as Deadband.  
Time Period Programming: A program that allows the  
thermostat to automatically adjust the heat setpoint and/or the  
cool setpoint based on the time of day.  
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Quick Start  
1
2
Getting to Know Your  
Thermostat  
Setting Clock and Day  
Basic Operation  
3
4
Viewing Temperature  
and Humidity  
5
Programming the  
Daily Schedule  
Programming the  
Fan Operation  
6
7
Thermostat Display  
Options  
8
Humidification  
9
Dehumidification  
10  
Viewing Equipment  
Run-Times  
1
1
Electric Heat and  
Heat Pump Operation 12  
Timers and Deadbands 13  
Using the  
Programmable Output 14  
Programming Remote  
Sensor Operation  
15  
Dry Contact Operation  
1
6
Light Activated  
Operation  
17  
18  
Energy Save  
Operation  
Programming the Run-  
Time Alerts  
1
9
Programming the  
Holiday Mode  
2
0
Configuring the MISC  
Outputs  
21  
Factory Defaults,  
2
2
Calibration, and Sensors  
Accessories  
23  
Advanced Setup Table  
Page iv  
24  
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SECTION 1  
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Section 1 Contents:  
Setting the Clock and Day...........1.2  
Selecting the Heat or Cool  
Mode............................................1.3  
Selecting Your Desired  
Temperature................................1.4  
Using the Fan Button...................1.4  
Note: Following the instructions in this section will allow you to  
operate your thermostat using the factory default settings. These  
settings are depicted in the illustrations throughout this manual.  
Page 1.1  
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MODE HUMIDITY  
SET CLOCK  
1
Press the MODE and  
HUMIDITY buttons  
at the same time  
During Setup & Programming:  
Pressing the UP or DOWN  
buttons will modify the flashing  
selection.  
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Am  
Setup  
I2:00  
I
To adjust the  
Clock or Day use  
Press  
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MODE  
Setup  
Mo  
2
Buttons.  
Press the MODE  
and HUMIDITY  
buttons at the  
same time to  
return to normal  
operation.  
MODE HUMIDITY  
SET CLOCK  
Page 1.2  
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1
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Select Mode by Pressing the MODE Button  
I2:00Pm  
Heating Only  
Su  
The HEAT setting indicates the  
temperature the room has to  
reach before the furnace will  
turn on to heat the room.  
HEAT  
Press  
70  
68  
MODE  
I2:00Pm  
Cooling Only  
Su  
76  
COOL  
The COOL setting indicates the  
temperature the room has to  
reach before the air conditioner  
will turn on to cool the room.  
Press  
70  
MODE  
I2:00Pm  
Su  
Heating or Cooling  
AUTO will automatically select  
heat or cool based on room  
temperature demand.  
76  
COOL  
AUTO  
HEAT  
70  
68  
Press  
Time Schedule for  
Heating or Cooling  
MODE  
Program On  
I2:00Pm  
Su  
Program On will activate the  
stored timer operation for the  
heating and cooling  
76  
COOL  
occupied  
1
HEAT  
setpoints (occupied or  
unoccupied periods).  
70  
68  
Press  
MODE  
I2:00Pm  
Su  
Off  
OFF indicates both heating  
and air conditioning  
systems are turned off.  
OFF  
70  
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AUTO OR PROGRAM MODE  
Pressing the UP or DOWN buttons in Auto or Program mode  
will adjust both the heat and cool set temperatures  
simultaneously.  
Adjust the desired  
set temperature with the  
I2:00Pm  
Su  
76  
COOL  
AUTO  
HEAT  
70  
68  
buttons.  
HEAT OR COOL MODE  
Pressing the UP or DOWN buttons in Heat or Cool mode will  
adjust only the heat or cool set temperature.  
Adjust the desired  
set temperature with the  
I2:00Pm  
Su  
76  
COOL  
70  
buttons.  
Press  
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FAN  
I2:00Pm  
Fan On indicates constant fan operation.  
If Fan On is selected the fan will run  
continuously at all times, except in Off,  
and will only run if there is a heating or  
cooling demand in Unoccupied periods.  
Pressing the FAN button toggles this  
feature on or off.  
Su  
76  
COOL  
AUTO  
HEAT  
FanOn 70 68  
Page 1.4  
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SECTION 2  
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2
Section 2 Contents:  
Front Panel Buttons.....................2.2  
Display Features...........................2.3  
Page 2.1  
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2
Warmer Button  
Backlit LCD Display  
(glows red)  
sometimes referred  
to as the UP button  
[
]
Carrier  
I2:00Pm  
Su  
74  
COOL  
AUTO  
HEAT  
72  
Cooler Button sometimes refer-  
(glows blue)  
red to as the  
[
]
DOWN button  
Override  
Button  
Heat or Cool Demand Indicator  
Red = Heat, Green = Cool  
Premier  
Commercial  
Programmable Thermostat  
I2:00Pm  
Su  
74  
COOL  
AUTO  
HEAT  
72  
MODE HUMIDITY  
SET CLOCK  
FAN  
PROGRAM HOLIDAY  
OUTSIDE  
OVER  
RIDE  
QUICK RELEASE FOR  
ACCESSORY PORT  
pg. 23.1)  
(
MODE HUMIDITY