Carrier 33Cs450 01 Users Manual Rev. 5

33CS450-01 88-506

33cs45001 1047e247-1463-4055-9cb3-271a98bceb57 Carrier Thermostat 33CS450-01 User Guide |

2015-01-24

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OWNER’S
MANUAL

COMMERCIAL

THERMOSTAT

P/N 33CS450-01

DIGITAL
IGITAL
THERMOSTAT

7-DAY
PROGRAMMABLE

HEAT
COOL

I2:00

HEAT
PUMP

74
COOL

AUTO

HEAT

3 Configurable Outputs
Control up to 3 Heat &
2 Cool Stages
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator
Dry Contact Equipped
Outdoor Sensor Ready with
High/Low Readouts for the Day
Set Point Limiting
Economizer Control
Preoccupancy Fan Purge

Accepts EZ Programmer
Remote Averaging
Programmable Output
Light Activation Equipped
Accepts Optional Humidity Module:
Controls Humidification,
Dehumidification and Reheat
Accepts Optional IR Remote Control

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

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

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

c
FC

Tested to Comply
with FCC Standards

4Z95

FOR HOME OR OFFICE USE

Page i

How to Use This Manual

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

Timers and Deadbands

Carrier

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
Run-Time Before the
14
Next Stage...............................14.6
Selecting 2nd Stage Turn
Off Temperature.....................14.7

Section contents

Visible section tab
on the side of the
page

Section and page #
Page 14.1

In addition, this manual also has an Index to help you find any information
regarding this thermostat quickly.

Page ii

Glossary of Terms

Carrier

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.

Page iii

Table of Contents

Carrier

1
2
3
Basic Operation
4
Viewing Temperature
5
and Humidity
Programming the
6
Daily Schedule
Programming the
7
Fan Operation
Thermostat Display
8
Options
Humidification
9
Dehumidification
10
Viewing Equipment
11
Run-Times
Electric Heat and
12
Heat Pump Operation
Timers and Deadbands 13
Using the
Programmable Output 14
Programming Remote
15
Sensor Operation
Dry Contact Operation 16
Light Activated
17
Operation
Energy Save
18
Operation
Programming the Run19
Time Alerts
Programming the
20
Holiday Mode
Configuring the MISC
21
Outputs
Factory Defaults,
22
Calibration, and Sensors
Accessories
23
Advanced
Setup
Table
24
Page iv
Quick Start

Getting to Know Your
Thermostat
Setting Clock and Day

SECTION 1

Quick Start

Carrier

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

Press the MODE and
HUMIDITY buttons
at the same time

Setting the Clock
I2:00

Setup

During Setup & Programming:
Pressing the UP or DOWN
buttons will modify the flashing
selection.

I
To adjust the
Clock or Day use
Press

Setting the Day

MODE

Setup

Press the MODE
and HUMIDITY
buttons at the
same time to
return to normal
operation.

MODE

HUMIDITY

SET CLOCK

Page 1.2

Buttons.

Carrier

Selecting the Heat or Cool Mode
Select Mode by Pressing the MODE Button

Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.

Cooling Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.

Heating or Cooling
AUTO will automatically select
heat or cool based on room
temperature demand.

Time Schedule for
Heating or Cooling
Program On will activate the
stored timer operation for the
heating and cooling
setpoints (occupied or
unoccupied periods).

Off
OFF indicates both heating
and air conditioning
systems are turned off.

I2:00
Su

70 6876
70 76
70 6876
70 68
70

HEAT

I2:00
Su

Press
MODE

COOL

I2:00
Su

Press
MODE

COOL

AUTO

HEAT

I2:00
Su

Program On

Press
MODE

COOL

occupied
1

I2:00
Su
OFF

Page 1.3

HEAT
Press
MODE

Carrier

Selecting Your Desired Temperature

(adjusting the setpoints)
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.

I2:00
Su

Adjust the desired
set temperature with the

70 68

COOL

AUTO

HEAT

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.

I2:00
Su

Adjust the desired
set temperature with the

76
COOL

buttons.

Using the Fan Button
I2:00
Su

Press

70 68

COOL

AUTO

HEAT

FanOn

FAN

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.

Page 1.4

SECTION 2

Getting to Know Your Thermostat

Carrier

Section 2 Contents:
Front Panel Buttons.....................2.2
Display Features...........................2.3

Page 2.1

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Front Panel
Warmer Button
(glows red)

Backlit LCD Display

[

]

sometimes referred
to as the UP button

Carrier

I2:00

74
COOL

AUTO

HEAT

Cooler Button
(glows blue)
Heat or Cool Demand Indicator Override
Button
Red = Heat, Green = Cool

[

Premier
Commercial
Programmable Thermostat

I2:00

COOL
AUTO

HEAT

MODE

HUMIDITY

FAN

PROGRAM HOLIDAY
OUTSIDE

SET CLOCK

OVER
RIDE

QUICK RELEASE FOR
ACCESSORY PORT
(pg. 23.1)

MODE

HUMIDITY

FAN

PROGRAM HOLIDAY
OUTSIDE

SET CLOCK

Page 2.2

]

sometimes referred to as the
DOWN button

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Display Features
2

I8:88

I88 88

Am Program On Setup
Pm StartStop
HI
SuMoTuWeThFrSa DeHumidify
Service Filter
Pan UV Light

AUTO
OFFON

Unoccupied
123
Override
FanOn

COOL
Outside
Remote
AUXHEAT
LO

Mode Indicators - Section 4
Selects the operational mode of the equipment.
HEAT - Indicates the heating mode.
COOL - Indicates the air conditioning mode.
AUTO - Indicates the system will automatically changeover
between heat and cool modes as the temperature varies.
OFF - Indicates heating and cooling is turned off.
PROGRAM ON - Indicates the time period program is enabled to
run.
Clock with Day of the Week - Section 3
Indicates the current time and day. This clock is also used to program
the time period schedules.
Room Temperature Display - Section 5
Indicates the current room temperature and displays the outside
temperature when selected.
Desired Set Temperature - Section 4/5
Indicates desired room temperature(s). Also displays the highest
and lowest outside temperatures for the day.
Outside icon - Section 5
Indicates the temperature displayed is from the optional outside
sensor.
Page 2.3

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Display Features
2

I8:88

I88 88

Am Program On Setup
Pm StartStop
HI
SuMoTuWeThFrSa DeHumidify
Service Filter
Pan UV Light

AUTO
OFFON

COOL
Outside
Remote
AUXHEAT

Unoccupied
123
Override
FanOn

Occupied & Unoccupied icons - Section 6
Indicates the program number: Occupied 1,2,3,or Unoccupied.
Override icon - Section 6
Indicates the program is currently being overridden for up to 4 hours.
Setup icon - Sections 7-20
Indicates the thermostat is in the setup mode.
Fan On icon - Section 7
Indicates constant, continuous fan operation. When Fan On is not
lit - indicates the fan will only operate when necessary to heat or to
cool.
Service Filter icon - Section 19
Appears when the filter should be serviced under normal conditions.
Adjustable from 0 - 1950 hours of blower operation.
icon - Section 8
Indicates keypad has been locked.

StartStop icon - Section 6
Appears when programming occupied time periods.

Page 2.4

Carrier

Display Features
2

I8:88

I88 88

Am Program On Setup
Pm StartStop
HI
SuMoTuWeThFrSa DeHumidify
Service Filter
Pan UV Light

AUTO
OFFON

COOL
Outside
Remote
AUXHEAT

Unoccupied
123
Override
FanOn

UV Light icon - Section 11/19
Appears when the UV bulb should be serviced under normal
conditions. Adjustable from 0 - 1950 days of operation.

Remote icon - Page 22.4
Indicates the remote sensor reading of the thermostat is being
viewed.
AuxHeat icon - Pages 10.5 & 13.4
Indicates 2nd stage electric strip heat is being used when the thermostat is programmed for Heat Pump operation. Only the Aux icon
will appear during Cool to Dehumidify to indicate Reheat operation.
Humidify/DeHumidify icon - Sections 9-10
Indicates the system is currently humidifying/dehumidifying the air.
Lo icon - Section 5
Indicates the lowest recorded outside temperature for the day.
Hi icon - Section 5
Indicates the highest recorded outside temperature for the day.
Service Pan icon - Section 16
Indicates that a sensor (accessory) has detected the condensate
drain pan is full and the compressor (Y1) has been locked out.

Page 2.5

SECTION 3

Setting the Clock and Day

Carrier

Section 3 Contents:
Setting the Clock..........................3.2
Setting the Day.............................3.2

Note: During setup & programming pressing the UP or DOWN
buttons will modify the flashing selection.

Page 3.1

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MODE

HUMIDITY

SET CLOCK

Press the MODE and
HUMIDITY buttons
at the same time

Setting the Clock
I2:00

Setup

During Setup & Programming:
Pressing the UP or DOWN
buttons will modify the flashing
selection.

I
To adjust the
Clock or Day use
Press

Setting the Day

MODE

Setup

Press the MODE
and HUMIDITY
buttons at the
same time to
return to normal
operation.

MODE

HUMIDITY

SET CLOCK

Page 3.2

Buttons.

SECTION 4

Basic Operation

Carrier

Section 4 Contents:
Programming for Auto or
Program Operation....................4.2
Selecting the Proper
Operating Mode.........................4.3
Selecting Your Desired
Temperature...............................4.7

Note: During setup & programming pressing the UP or DOWN
buttons will modify the flashing selection.

Page 4.1

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Programmable or Non-Programmable
Thermostat
4

When the very simplest operation is desired, this thermostat
may be configured to be non-programmable, with or without
Auto-Changeover. Follow the step below.

If ‘NO’ is selected, the thermostat will lockout the Program On screen;
only the Off, Heat, Cool, and Auto screens may be accessed by
pressing the MODE button.
Select ‘YES’ if you would like your thermostat to be programmable,
then the Program mode will be accessible through the use of the
MODE button.

MODE
PROGRAM

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Program On Setup

YES

Select Yes if you would like
the thermostat to be programmable or No for non-programmable.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

i
Press

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 4.2

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Manual or Auto-Changeover
Thermostat
When the very simplest operation is desired, this thermostat may
be configured to be a manual heat and cool thermostat, with or
without time period programmability. Follow the step below.

The thermostat may be programmed to function as a Heat Only or
Cool Only thermostat by selecting ‘NO’ in the setup screen below.
This will lockout the Auto-Changeover screen and only allow the Off,
Heat, Cool, and Program On screens to be accessed.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.
Setup

YES

Select Yes if you would
like the thermostat to
be Auto-Changeover or
No for a Heat Only and
Cool Only Thermostat.

AUTO
Press

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 4.3

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Operating Mode when the Thermostat
is Configured to be:
4

NON-PROGRAMMABLE WITH MANUAL-CHANGEOVER - If the
thermostat is configured to be a non-programmable thermostat with
Manual-Changeover, the following screens will be available by
pressing the MODE button.

Select the Mode by Pressing the MODE Button
Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.

Cooling Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.

Off
OFF indicates both heating
and air conditioning
systems are turned off.

I2:00
Su

70 68
76
70
70

HEAT

I2:00
Su

Press
MODE

COOL

I2:00
Su
OFF

Page 4.4

Press
MODE

Carrier

Operating Mode when the Thermostat
is Configured to be:
NON-PROGRAMMABLE WITH AUTO-CHANGEOVER - If the
thermostat is configured to be a non-programmable thermostat
with Auto-Changeover, the following screens will be available by
pressing the MODE button

Select the Mode by Pressing the MODE Button
Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.

Cooling Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.

Heating or Cooling
AUTO will automatically select
heat or cool based on room
temperature demand.

Off
OFF indicates both heating
and air conditioning
systems are turned off.

I2:00
Su

70 68
76
70
76
70 68
70

HEAT

I2:00
Su

Press
MODE

COOL

I2:00
Su

Press
MODE

COOL

AUTO

HEAT

I2:00
Su
OFF

Page 4.5

Press
MODE

Carrier

Operating Mode when the Thermostat
is Configured to be:
PROGRAMMABLE WITH MANUAL-CHANGEOVER - If the thermostat is
configured to be a programmable thermostat with Manual-Changeover, the
4 following screens will be available by pressing the MODE button.

Select the Mode by Pressing the MODE Button

Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.

Cooling Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.

I2:00
Su

HEAT

I2:00
Su

Press
MODE

COOL

Time Schedule for
Heating Only
The HEAT Program On setting
will activate the time period
program for the heating
setpoint ONLY (occupied or
unoccupied periods).

I2:00
Su

Time Schedule for
Cooling Only
The COOL Program On setting
will activate the time period
program for the cooling
setpoint ONLY (occupied or
unoccupied periods).

I2:00
Su

Off
OFF indicates both heating
and air conditioning
systems are turned off.

70 6876
70
70 6876
70
70

occupied
1

Press
MODE

Program On

HEAT

Press
MODE

Program On

COOL

occupied
1

I2:00
Su
OFF

Page 4.6

Press
MODE

Carrier

Operating Mode when the Thermostat
is Configured to be:
PROGRAMMABLE WITH AUTO-CHANGEOVER - If the thermostat is
configured to be a programmable thermostat with Auto-Changeover,
the following screens will be available by pressing the MODE button.

Select the Mode by Pressing the MODE Button
Heating Only
The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.

Cooling Only
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.

Heating or Cooling
AUTO will automatically select
heat or cool based on room
temperature demand.

Time Schedule for
Heating or Cooling
Program On will activate the
time period program for the
heating and cooling
setpoints. (occupied or
unoccupied periods)

Off
OFF indicates both heating
and air conditioning
systems are turned off.

I2:00
Su

70 6876
70 76
70 6876
70 68
70

HEAT

I2:00
Su

Press
MODE

COOL

I2:00
Su

Press
MODE

COOL

AUTO

HEAT

I2:00
Su

Program On

Press
MODE

COOL

occupied
1

I2:00
Su
OFF

HEAT
Press

Page 4.7

MODE

Carrier

Selecting Your Desired Temperature (adjusting setpoints)
4

AUTO OR PROGRAM MODE
Pressing the UP or DOWN buttons in Auto or Program
modes will adjust both the heat and cool set temperatures
simultaneously. For more information on this see page 13.2.

I2:00
Su

70 68

Adjust the desired
set temperature with the

COOL

AUTO

HEAT

buttons.

HEAT OR COOL MODE
Pressing the UP or DOWN buttons in Heat or Cool modes will
adjust only the heat or cool set temperature.

I2:00
Su

Adjust the desired
set temperature with the

COOL

buttons.

Page 4.8

SECTION 5

Viewing the Temperature and Humidity Sensors
Carrier

Section 5 Contents:
Viewing the Outside
Temperature..............................5.2
Viewing the Indoor
Humidity....................................5.3

Page 5.1

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Viewing the Outside Temperature
Requires an outside sensor (optional accessory) to be installed (see
page 15.2 for wiring instructions). To read the temperature from the
outside sensor, press the PROGRAM and HOLIDAY buttons. The
display will then show the current outside temperature along with the
5 highest and lowest temperatures for the day.
PROGRAM HOLIDAY
OUTSIDE

Press the PROGRAM
button. While holding
PROGRAM, press the
HOLIDAY button to view
the Outside temperature.

The highest and lowest
temperatures for the day
will be displayed along
with the current outside
temperature.
This reading is from the
sensor connected to RS2.

Press the PROGRAM
button. While holding
PROGRAM, press the
HOLIDAY button to leave
the Outside temperature
screen.

High temperature
for the day.

Outside

Current outside
temperature.

83 68
HI

Low temperature
for the day.

PROGRAM HOLIDAY
OUTSIDE

Note: If no sensors are connected 2 dashes [- -] will appear.

Page 5.2

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Viewing the Indoor Humidity
Requires the Humidity Module (optional accessory) to be installed.
To display the current humidity at the thermostat, press the
HUMIDITY button. The display will then show the current indoor
humidity along with the humidification setpoint (Section 9).
Note: The humidity reading will not appear unless the Humidity
Module has been installed. If the Humidity Module has not been
installed dashes will appear in place of the humidity reading.

HUMIDITY

To view the indoor humidity
reading, press the
HUMIDITY button

Current Room Humidity

Setup

Humidify

I
Press
HUMIDITY

Press the HUMIDITY button
again to return the display
to normal operation.
NOTE: Due to variations in environmental conditions, it is not always possible
to achieve the desired humidification or dehumidification setpoint.

Page 5.3

SECTION 6

Programming the Daily Schedule

Carrier

Section 6 Contents:
6

Programming a Daily
Schedule...................................6.2
Overriding the Daily
Schedule...................................6.6

Page 6.1

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Programming a Daily Schedule
Press
PROGRAM

Press the PROGRAM button to enter time period programming.
Use the Programming Worksheet on the back cover
to help with this section.

Select the maximum # of
occupied periods to be
used on any one day.
Typically most installations
use only Occupied 1.
(1,2 or 3)

6
occupied
1
Press
MODE

74
Adjust the cooling
setpoint for Occupied 1.
(35 - 99, OF )

COOL
occupied
1
Press
MODE

74
Adjust the heating
setpoint for Occupied 1.
(OF, 35 - 99 )

COOL
occupied
1

HEAT
Press
MODE

85
Adjust the cooling
setpoint for unoccupied
periods.
(35 - 99, OF )

COOL
Unoccupied
Press
MODE

Page 6.2

Continued

Carrier

85
Adjust the heating setpoint for Unoccupied
periods.

COOL

HEAT

Unoccupied

(OF, 35 - 99 )

Press
MODE

6
Mo

Select the day for
Occupied 1.
(Mo - Su)

occupied
1
Press
MODE

7:00

Adjust the start time
for Occupied 1.

Start

occupied
1
Press
MODE

6:00

Adjust the stop time
for Occupied 1.

Stop

occupied
1
Press
MODE

On
Mo

Select Occupied 1 to run
on this day (On), or not to
run on this day (Off).
Off

occupied
1

Press
MODE

Page 6.3

Continued

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The copy command becomes available after the maximum # of
occupied periods are programmed in a day. This example uses
only one occupied period.
Yes

Select Yes to copy the
previous day’s program
to this day.

If No is selected:

If Yes is selected:

Selecting Yes, then pressing mode will copy the
previous day’s program. If yes is selected again,
or each time, this routine will repeat.

Press
MODE

Select the day
for Occupied 1.
(Tu - M)

occupied
1

Press
MODE

7:00

Adjust the start time
for Occupied 1.

Start

occupied
1

Press
MODE

6:00

Adjust the stop time
for Occupied 1.

Stop

occupied
1

Press
MODE

Continued

Page 6.4

Carrier
On
Tu

Select Occupied 1 to run
on this day (On), or not to
run on this day (Off).

occupied
1

Off

Yes

Select Yes to copy
the previous day’s
program to this day.

Press
MODE

If No is selected:

If Yes is selected:

Selecting Yes, then pressing mode will copy the
previous day’s program. If yes is selected each
time, this routine will repeat.

Press
MODE

If No is selected, as in previous steps, flashing prompts will appear to input start
and stop times for Occupied 1. If more than one occupied period was selected in
the first programming step (page 6.2), then the cool and heat setpoints, and start
and stop times for each additional occupied period will be prompted.
Press
PROGRAM

After programming for all seven days is complete, press the PROGRAM button to
leave the Setup screens. If no buttons are pressed, the display will leave the setup
screens after 30 seconds.

PROGRAMMING TIPS
If only the Occupied 1 period is selected in the first programming step (page 6.2), Occupied
2 & 3 programming steps are skipped. Furthermore, if Occupied 2 is selected, Occupied 3
programming steps are skipped.
Heat & Cool setpoints for Occupied 1 are the same for every day of the week. If desired,
Heat & Cool setpoints for Occupied 2 & 3 can be adjusted differently for each day of the week.
If the start time is set later in the day than the stop time, the program will run from the start
time to midnight and from midnight to the stop time on the same day. For example: 9pm start,
8am stop, on Monday. In this example the program will run from 12am Monday to 8am Monday
and again from 9pm Monday to 12am Tuesday.
Unoccupied Operation: The unoccupied settings take effect at all times when: (1) the program is
on and (2) the current time is outside a preset occupied period. For this reason start and stop
times are not necessary for unoccupied time periods.
If the same start and stop times are programmed for an occupied period, then it will run
24 hours.
If one occupied period starts and stops within another occupied period the lower occupied # has
priority. For example: If Occupied 3 is programmed to be on 24 hours, and Occupied 2 is
programmed to run that day, then the Occupied 2 setting will take over for Occupied 3 between
Occupied 2 start and stop times.

Page 6.5

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Overriding the Daily Schedule
The OVERRIDE button may be used to interrupt the normal time
schedule programming of the thermostat. Override may only be used
when the thermostat is running the time schedule, in Program On
mode.
Unoccupied Operation - During programmed, unoccupied
periods, pressing the OVERRIDE button will temporarily
6
force the thermostat into Occupied 1 comfort settings for 30
minutes. The remaining Override time will alternate with the
clock (refer to the second display below). The Override timer
can be set up to a maximum of four (4:00) hours, in increments
of 30 minutes. If the timer has been set for the maximum time,
the next press of the OVERRIDE button will reset the timer,
returning the thermostat to the correct time period program for
the day.
Occupied Operation - During programmed, occupied periods, a
press of the OVERRIDE button will force the thermostat into an
unoccupied period for the remainder of the day. During this
forced unoccupied period the OVERRIDE button will operate as
described above.

7:56

65 55

Program On

COOL

Unoccupied

HEAT

7:56
:30
We

65 72
Program On

COOL

occupied
1
Override

Press
OVERRIDE

HEAT

Page 6.6

SECTION 7

Programming the Fan Operation

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Section 7 Contents:
7

Using the Fan Button.................7.2
Smart Fan Operation..................7.2
Setting the Fan-Off Time
Delay..........................................7.3
Fan Purge Operation..................7.4

Page 7.1

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Using the Fan Button
When the fan is set for automatic operation it will energize any time
there is a call for heating or cooling, otherwise the fan will remain off.
Pressing the FAN button will energize the fan and display the FanOn
icon on the thermostat display. To operate the fan in the automatic
mode, press the FAN button again and the FanOn icon will disappear.
Press
FAN

I2:00
Su

70 68

COOL

AUTO

HEAT

FanOn

Smart Fan Operation
This feature allows the fan to run continuously during Occupied 1, 2
or 3 and automatically de-energize during Unoccupied, except when
necessary to heat or cool. To use this feature, place the thermostat in
the Program On mode. Next, press the FAN button to display the
FanOn icon (see below).

Press
FAN

I2:00
Su

70 68

Program On

COOL

occupied
1
FanOn

Page 7.2

HEAT

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Setting the Fan-Off Time Delay
To increase cooling efficiency of your unit, the thermostat may be
programmed to continue running the fan after a call for cooling has
been satisfied. This delay may be set for 30, 60, or 90 seconds. If
the Fan Off Delay is set for zero seconds, the fan will not energize
after a call for cooling has been satisfied.

7
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

:00

Setup

Set the Fan Off Delay
to 0, 30, 60, or 90
seconds.

FanOn

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 7.3

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Fan Purge Operation
When this feature is activated, the fan will turn on during an
unoccupied period at a preset amount of time prior to Occupied 1.
This preoccupancy fan purge timer may be set from zero to three
hours, in 15 minute increments. Zero means this feature is turned off.

7
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0:00
Adjust the preoccupancy
fan purge timer.
0 - 3 hours.
0:00 = off

Setup

4
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 7.4

SECTION 8

Thermostat Display Options

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Section 8 Contents:
8

Turning On/Off the
Backlight...................................8.2
Programming the Thermostat
to Display Temperature in
Fahrenheit or Celsius..............8.2
Locking/Unlocking the
Keypad......................................8.3
Programming a Security
Level..........................................8.4

Page 8.1

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Turning On/Off the Backlight
Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

MODE
PROGRAM

Press the MODE button repeatedly
until this setup screen appears.

MODE

Setup

Select backlight operation:
AUTO - Light from 6pm to
6am nightly.
ON - Light continuously.
OFF - Light for 8 seconds
after a button press.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

AUTO

Press
MODE

Programming the Thermostat to Display
Temperature in Fahrenheit or Celsius
Setup

Select thermostat
operation in degrees
Fahrenheit or Celsius.
F

6
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 8.2

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Locking/Unlocking the Keypad
To prevent unauthorized use of the thermostat, the front panel
buttons may be disabled. To disable, or ‘lock’ the keypad, press
and hold the MODE button. While holding the MODE button,
press the UP and DOWN buttons together. The
icon will
appear on the display, then release the buttons.

I2:00
8

Press all three
buttons in the order
outlined above for
keypad lockout

65 55

COOL

AUTO

HEAT

MODE

To unlock the keypad, press and hold the MODE button. While
holding the MODE button, press the UP and DOWN buttons
together. The
icon will disappear from the display, then
release the buttons.

Page 8.3

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Programming a Security Level
When a security level has been programmed, the thermostat will allow
limited adjustment to the setpoints (steps # 8 and 9). In security
levels 2 and 3, the thermostat is forced into the Program On mode.
To disable the security feature, set the value in step #7 to 0; this will
cause steps # 8 and 9 not to appear.
MODE
PROGRAM

MODE

Press the MODE button. While holding Note: Press the MODE
button momentarily
the MODE, press the PROGRAM
to move through the
button to enter Setup screens.
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0
80
65

Setup

Select the security level:
0=No security in effect
1=Setpoint range limited
2=1+ program on all times
3=2 + prohibits setpoint
changes
Step #8 appears only
if step #7 is not 0.

(35 - 99 )
Step #9 appears only
if step #7 is not 0.

Press

(35 - 99 )

8
HEAT
Press
MODE

Setup

Adjust the minimum
allowable cool setpoint
when security is in effect.

7
MODE

Setup

Adjust the maximum
allowable heat setpoint
when security is in effect.

9
COOL

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 8.4

SECTION 9

Humidification

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Section 9 Contents:

Installing the Humidity
Module.......................................9.2
Setting a Thermostat Jumper
for Humidity Operation............9.3
Adjusting the Humidification
Setpoint.....................................9.4
NOTE: The humidification functions described in this section will
only be available if a Humidity Module has been properly installed.

Disclaimer:
The manufacturer of this thermostat cannot be liable for
misinstallation, improper connection or improper programming of
the humidity functions of this thermostat that may result in water
damage or mold growth.
Additionally, the manufacturer of this thermostat is not responsible
for the fitness of the humidifier and/or installation of said humidifier
connected to this thermostat. Furthermore, the maintenance of the
humidifier components, including but not limited to, the filters and
pads are not the responsibility of the thermostat manufacturer.
The Humidifier Service icon is only a suggestive reminder and
should not take the place of the humidifier manufacturer’s
required maintenance requirements and schedule.

Page 9.1

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Installing the Humidity Module
To install the Humidity Module the thermostat must be detached
from the back plate. Plug the Humidity Module into the Humidity
Module connector as shown in Figure 2 below. Follow the detailed
instructions included with the Humidity Module accessory. Once the
Humidity Module has been installed, you must adjust the Humidity
jumper setting to HUM as shown in Figure 1 below. This will allow
you to access the humidification and dehumidification setup steps.
For proper humidity operation, this
jumper must be set for HUM.
Figure 1
Back of 33CS450-01
HUM
GAS

(FAN)

ELEC

PROG

NO HUM

GAS

HUM
DEHUM
ECON
MISC3

MISC2

MISC1

(MISC1
ONLY)

W1
HUM

NO HUM

MISC1
Rs2

MISC2

MISC3

CK1
Z

1 X

RS+5
Rs1
RSGND

Install the Humidity Module

INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
9

R
C

CKGND

(see Humidity Module Instruction
Sheet for more detailed information).

Figure 2
Humidity Module
Thermostat Circuit
Board.

Page 9.2

Humidity Module
Plug located on
the Thermostat
Circuit Board.

Carrier

Setting a Thermostat Jumper for
Humidity Operation
To operate one of the MISC outputs using humidity-based operation,
place the MISC1, MISC2, or MISC3 jumper on the terminal labeled
HUM (see diagram below). This will supply 24VAC to the selected
MISC terminal based on the humidification programming in the
following pages. Only one of the three outputs (MISC1, MISC2, or
MISC3) is required to have this jumper. For more information
regarding the MISC1, MISC2, and MISC3 outputs, please see
section 21.

In the diagram below, the MISC3 jumper
has been set for HUM (humidify) operation.

GAS

(FAN)

ELEC

PROG

GAS

HUM
DEHUM
ECON
MISC3

MISC2

MISC1

(MISC1
ONLY)

HUM

NO HUM

MISC1
RS2

MISC2

MISC3

CK1

ECON

1 X

RS+5

CKGND

Rs1

MISC3

RSGND

MISC2

MISC1

INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD

DEHUM
(MISC1
ONLY)

IMPORTANT CAUTION
NEVER PUT MORE THAN ONE JUMPER
ON THE SAME MISC JUMPER BLOCK!
THIS MAY DAMAGE THE THERMOSTAT
MISC3

MISC3

Page 9.3

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Adjusting the Humidification Setpoint
If your HVAC unit is equipped with a humidification system and the
Humidity Module has been installed, the thermostat will provide power
to the appropriate terminal on the backplate of the thermostat when
the humidity in the building falls below the setpoint you have chosen.
The value for this setpoint ranges from 0% to 60%.
NOTE: Due to variations in environmental conditions, it is not always possible
to achieve the desired humidification or dehumidification setpoint.
HUMIDITY

Press the HUMIDITY
button to enter the
Humidity Setup screen.

Current Room Humidity
Adjust the desired
humidification setpoint
(0%-60%)

NOTE: Each step # is located at
the top right corner of the
display for easy reference.

Setup

Humidify

I
Press
HUMIDITY

Press the HUMIDITY button to leave the
Humidity Control screens (if no buttons are
pressed, the display will leave the Humidity
Control screens after 30 seconds).

Humidification Notes: Press the
button to set the humidity
setpoint to 0% for no humidification operation.

You cannot set the dehumidify setpoint any lower than the humidify setpoint; a
5% differential is forced between the humidify and dehumidify setpoints.

Page 9.4

SECTION 10

Dehumidification

Carrier

Section 10 Contents:

Configuring a Thermostat Output
Jumper for Dehumidification
Operation................................10.2
Adjusting the Dehumidification
Setpoint...................................10.3
Using Your Air Conditioner
to Dehumidify.........................10.4
Using the Reheat
Function..................................10.5
Using the DEHUM
Terminal..................................10.6

NOTE: The dehumidification functions described in this section will
only be available if a Humidity Module has been properly installed.
For instructions on installing the Humidity Module please see page 9.2.

Page 10.1

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Setting a Thermostat Jumper for
Dehumidification Operation
To control a MISC output for dehumidification, install the Humidity
Module and place the Humidity Jumper on HUM (see page 9.2).
Then place the MISC1, MISC2, or MISC3 jumper on the terminal
labeled DEHUM (see diagram below). This will supply 24VAC to the
selected MISC terminal based on the programming in the following
pages. Only one of the three outputs (MISC1, MISC2, or MISC3) is
required to have a jumper. For more information regarding the
MISC1, MISC2, and MISC3 outputs, please see section 21.
In the diagram below, the MISC2 jumper has
been set for DEHUM (dehumidification) operation.

GAS

(FAN)

ELEC

PROG

GAS

HUM
DEHUM
ECON
MISC3

MISC2

MISC1

(MISC1
ONLY)

HUM

NO HUM

MISC1
Rs2

MISC2

MISC3

CK1

ECON

1 X

RS+5

CKGND

Rs1

MISC3

RSGND

MISC2

MISC1

INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD

DEHUM
(MISC1
ONLY)

IMPORTANT CAUTION
NEVER PUT MORE THAN ONE JUMPER
ON THE SAME MISC JUMPER BLOCK!
THIS MAY DAMAGE THE THERMOSTAT
MISC3

MISC3

Page 10.2

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Adjusting the Dehumidification Setpoint
Dehum Terminal: If a MISC terminal is selected for DEHUM operation
(see page 10.2), then the thermostat will provide power to this terminal
when the humidity in the building is above the setpoint you have chosen.
See page 10.6 for detailed programming instructions. To utilize this
feature your HVAC unit must be equipped with a DEHUM terminal.

Cool to Dehumidify: If the thermostat is programmed for Cool to
Dehumidify operation, then the thermostat will energize the cooling
system any time the humidity in the building is above the setpoint you
have chosen. The thermostat may also be programmed for Reheat
operation if available. See pages 10.4 and 10.5 for detailed
programming instructions.
In each case, when the indoor humidity falls below the setpoint you
have selected, Cool to Dehumidify and the MISC terminal will be
de-energized. The value for this setpoint ranges from 25% to 99%.

NOTE: Due to variations in environmental conditions, it is not always
possible to achieve the desired humidification or dehumidification setpoint.
Press the HUMIDITY button
HUMIDITY
NOTE: Each step # is located at
to enter the Humidification
the top right corner of the
Setup screens.
display for easy reference.
MODE
Press the MODE button once
ON / + Current Room Humidity

Adjust the desired
dehumidification setpoint
(25%-99%)
OFF / -

Setup

DeHumidify

2
Press
HUMIDITY

Press the HUMIDITY button to leave the Humidity
Control screens (if no buttons are pressed, the display
will leave the Humidity Control screens after 30 seconds).

Dehumidification Notes: Press the
button to set the
dehumidification setpoint to 99% for no dehumidification operation.
This will lockout Advanced Setup steps 10, 11, and 12 (see pages
10.4 - 10.5).
You cannot set the dehumidify setpoint any lower than the humidify setpoint; a
5% differential is forced between the humidify and dehumidify setpoints.

Page 10.3

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Using Your Air Conditioner to Dehumidify
If Cool to Dehumidify is on and the Humidity Module is installed,
the thermostat has the ability to initiate a cooling cycle for advanced
dehumidification operation. When the thermostat detects the humidity
percentage is above the setpoint for dehumidification, and heating or
cooling is not on, the thermostat will force the compressor to run with
the fan, thus reducing moisture in the air. The green LED will blink
once every eight seconds to indicate this is taking place. This feature
will also allow you to adjust the cooling overshoot of the setpoint, from
0° to 5° (adjustable in step #11). For Example: If the cooling overshoot is
set for 3°F and the cooling setpoint is set for 74°F, then as long as the room
temperature reads between 71°F and 74°F this feature will energize the
compressor and fan to dehumidify the air.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Steps 10 and 11 only appear if the Dehumidification
setpoint is not 99% (see page 10.3).
Setup

DeHumidify

Select Cool to
Dehumidify feature.

OFF

Press

Off

MODE

Step 11 appears only if step 10 is set to “ON”

Setup

Adjust the maximum
overshoot of the set
temperature in Cool to
Dehumidify mode.
(0 - 5 )

DeHumidify

Ii
COOL
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Dehumidification Notes: The thermostat must be in the Cool, Auto, or
Program On mode for the Cool to Dehumidify feature to be available.

Page 10.4

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Using the Reheat Function
This feature allows the thermostat to turn on Electric Heating (W2)
during Cool to Dehumidify to maintain room temperature until the
dehumidification setpoint is reached. The cooling cycle will allow for
the dehumidification of the air to occur while the Electric Heating will
allow for a constant room temperature. If Reheat is enabled the Aux
icon will appear on the display during Cool to Dehumidify operation.

MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Step 12 appears only if step 10 is set to “ON” and if the
Dehumidification setpoint is not 99% (see page 10.3).
On

Setup

If Reheat operation is
desired during the
dehumidification process
select On; otherwise select
Off.

DeHumidify
OFF

I2
HEAT
Press

Off

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Dehumidification Notes: Reheat is only available if Cool to
Dehumidify has been set to ON in step #10 (see page 10.4).

Page 10.5

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Using the Dehum Terminal
If you configure a MISC output jumper for DEHUM, it may be
programmed to operate in one of two ways:
1) Normally Closed (NC): The thermostat will de-energize the
DEHUM terminal to allow the fan to run in low speed when there
is a call for 1st stage cooling and the room humidity is greater than
the dehumidification setpoint.
2) Normally Open (NO): The thermostat will energize the DEHUM
terminal to allow the fan to run in low speed when there is a call
for 1st stage cooling only and the room humidity is greater than
the dehumidification setpoint.

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

MODE
PROGRAM

Press the MODE button repeatedly
until this setup screen appears.

MODE

Setup

Normally Closed (NC) =
DEHUM deenergized for
low speed fan.

DeHumidify

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Normally Open (NO) =
DEHUM energized for
low speed fan.

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Dehumidification Notes: The DEHUM terminal will “release” and allow
the fan to operate normally if there is call for 2nd stage cooling or if the call
for Cooling and/or Cool to Dehumidify has been satisfied.

Page 10.6

SECTION 11

Viewing Equipment Run-Times

Carrier

Section 11 Contents:

Viewing the Heat
Run-Time.................................11.2
Viewing the Cool
Run-Time.................................11.3
Viewing the Override
Run-Time.................................11.4
Viewing the Humidifier
Run-Time................................ 11.5
Viewing the UV Light
Run-Time.................................11.6

Page 11.1

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Viewing the Heat Run-Time - Energy Watch
This display will track the number of hours that your heating system
has been operating. Press the FAN button to reset the counter.
MODE
PROGRAM

MODE

Press

FAN

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

0
Counts the number of
hours Heat has been
running. Press FAN to
reset the Energy Watch*
Heat counter.
(0 - 1999 hrs.)

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

I4
11

HEAT
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Energy Watch: This feature enables you to closely monitor your
* energy
usage by keeping track of the number of hours your
heating system has been operating.

Page 11.2

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Viewing the Cool Run-Time - Energy Watch
This display will track the number of hours that your cooling system
has been operating. Press the FAN button to reset the counter.
MODE
PROGRAM

MODE

Press

FAN

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0
Counts the number of
hours Cool has been
running. Press FAN to
reset the Energy Watch*
Cool counter.
(0 - 1999 hrs.)

Setup

I5
COOL
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Energy Watch: This feature enables you to closely monitor your
* energy
usage by keeping track of the number of hours your
cooling system has been operating.

Page 11.3

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Viewing the Override Operation Run-Time
This display will track the number of hours that your thermostat has
been operating in the Override mode (see page 6.6). Press the FAN
button to reset the counter.
MODE
PROGRAM

MODE

Press

FAN

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

0
Counts the number of
hours Override has
been active. Press FAN
to reset the Override RunTime counter.

Setup

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

I6
11

Override

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 11.4

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Viewing the Humidification Run-Time
After your humidification system has been operating for the number of
days set in step #17 below, the Service Humidify icon will appear. This
counter keeps track of the number of days since the Service Humidify
icon was reset.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Counts the number of
Press days the humidifier has Service
been running. Press
FAN to reset the
Service Humidify
counter and remove the
FAN
icon from the display.

Setup

Humidify

I7
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 11.5

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Viewing the UV Light Run-Time
After the UV light has been operating for the number of days set in
step #18 below, the Service UV Light icon will appear. This counter
keeps track of the number of days since the UV light icon was last
reset.

MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Counts the number of days
Press since the UV Light was last
reset. Press FAN to reset
the Service UV Light counter
and remove the icon from the
FAN
display.

0
Service
UV Light

Setup

I8
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 11.6

SECTION 12

Electric Heat and Heat Pump Operation
Carrier

Section 12 Contents:

Viewing the Heat Pump and
Reversing Valve Jumper
Setting.....................................12.2
Viewing the Electric Heat
Jumper Setting.......................12.3
Using Emergency Heat............12.4

Page 12.1

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Viewing the Heat Pump and
Reversing Valve Jumper Settings
Steps 19 and 20 are ‘Read Only’ and may only be set with the
jumpers on the circuit board of the thermostat.

MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.
Setup

ON = Heat Pump
operation
OFF = Gas Electric
operation

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

I9
12

OFF

Press
Setup

Indicates that the
thermostat jumper
is set for an O
reversing valve
(energize in cooling)
or a b reversing valve
(energize in heating).

MODE

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 12.2

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Viewing the Electric Heat Jumper Setting
Placing the jumper on ELEC will cause the thermostat to turn on the
fan immediately any time there is a heat demand. Since most gas
furnaces control the fan, this feature should be off unless it is
necessary for the thermostat to energize the fan with first stage heat.
Step 21 is ‘Read Only’ and may only be set with the jumpers on the
circuit board of the thermostat.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

12
Setup

ON indicates that the
thermostat jumper is
set for Electric Heat
operation, or OFF for
Gas/Electric or Heat
Pump operation.

OFF

2i
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 12.3

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Using Emergency Heat
ENTER EMERGENCY HEAT: Only available if you have a Heat Pump
installed. To initiate the Emergency Heat feature, press the FAN
button. While holding the FAN button press the UP button. The
Cool setpoint display will read ‘EH’ (emergency heat).

I2:00
Su
Press for
Emergency Heat
FAN

HEAT

OPERATION: During Emergency Heat operation the
thermostat will turn on the fan and the 2nd stage of heat
when there is a demand for heat. Also during Emergency
Heat the 1st stage of heating or cooling will be unavailable.
EXIT EMERGENCY HEAT: Follow the same steps as entering
Emergency Heat by pressing the FAN and UP buttons. During
Emergency Heat, only OFF and HEAT modes are available by
pressing the MODE button.

Page 12.4

SECTION 13

Timers and Deadbands

Carrier

Section 13 Contents:

Adjusting the Heat/Cool
Differential..............................13.2
Adjusting the Cycles
Per Hour..................................13.3
Adjusting the Deadband..........13.4
Adjusting the Minutes of
Run-Time Before the
Next Stage...............................13.6
Selecting 2nd Stage Turn
Off Temperature.....................13.7

Page 13.1

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Adjusting the Heat/Cool Differential
The Heat and Cool setpoints will not be allowed to come any closer to
each other than the value in this step. This minimum difference is
enforced during Auto-Changeover operation.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

Adjust the minimum
difference between
cooling & heating
setpoints.
(0 - 6 )

22
COOL
HEAT
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons
are pressed, the display will leave the setup screens after 30 seconds.

Note: To increase the spread between the heating and cooling
setpoints, press the MODE button until only the heat setpoint is
displayed. Adjust the desired setpoint. Wait two seconds after
adjusting the set point so the thermostat can accept the change.
Press the MODE button until only the cool setpoint is displayed.
Adjust the desired setpoint. Wait two seconds after adjusting the
set point so the thermostat can accept the change. Press the
MODE button again to enter the Auto-Changeover mode where
both the heat and cool setpoints are displayed.

Page 13.2

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Adjusting the Cycles Per Hour
The Cycles Per Hour setting limits the number of times per hour
your HVAC unit may energize. For example, at a setting of 6 cycles
per hour the HVAC unit will only be allowed to energize once every 10
minutes. The Cycles Per Hour limit may be overridden and reset by
pressing the UP or DOWN buttons on the thermostat.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Setup

Select the cycles per
hour limit.
d=cycles per hour
limit defeated.
d1=d + defeat 5 min.
compressor lockout.
(d1, d, 2 - 6)

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 13.3

Press
PROGRAM

Carrier

Adjusting the Deadband
MULTI-STAGE OPERATION - Controls up to three Heat and two Cool
stages.
The 2nd Stage of heat or cool is turned on when:
(A) The 1st Stage has been on for the time required (step #27,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.
And
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the 1st stage deadband (step #24, next
page), plus the 2nd stage deadband (step #25, next page).
This 2nd stage deadband is adjustable from 0-10 degrees and
the default is two degrees.
The 3rd Stage of Heat is turned on when:
(A) The 2nd stage has been on for the time required (step #28,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.
And
(B) The temperature from the setpoint is equal to or greater 13
than: the setpoint plus the 1st stage deadband (step #24, next
page), plus the 2nd stage deadband (step #25, next page)
plus the 3rd stage deadband (step #26, next page). This 3rd
stage deadband is adjustable from 0-10 degrees and the
default is two degrees.
Cooling

Heating

3rd Stage
turn on

Deadband

db 3
(adj. 0-10 )

db 2
(adj. 0-10 )

db 1
(adj. 1-6 )

db 2
(adj. 0-10 )

2nd Stage
turn on

1st Stage
turn on

DECREASE

Heat
Setpoint

Cool
Setpoint

TEMPERATURE

1st Stage
turn on

2nd Stage
turn on

INCREASE

The above figure assumes the minimum on time for the prior stage has
been met to allow the next stage to turn on, once the deadbands have
been exceeded.

Page 13.4

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Adjusting the Deadband
For more detailed information, please see the explanation on the
previous page.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

2
25
2
26
2
Setup

Adjust the deadband
for the 1st stage.
(1 - 6 )

Press
MODE

Setup

Adjust the deadband
for the 2nd stage.
(0 - 10 )

Press
MODE

Setup

Adjust the deadband
for the 3rd stage.
(0 - 10 )

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 13.5

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Adjusting the Minutes of Run-Time
Before the Next Stage
For more detailed information, please see the explanation on page 13.4.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

0:02
Adjust the amount of
time stage 1 must be
on before stage 2 turns
on.
(0 - 60 min.)

0:02
Adjust the amount of
time stage 2 must be
on before stage 3 turns
on.
(0 - 60 min.)

2
28
3
Setup

Setup

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 13.6

Press
MODE

Press
PROGRAM

Carrier

Selecting 2nd Stage Turn
Off Temperature
If ON is selected, the second stage of cooling or heating will remain
energized until the thermostat reaches the setpoint on the thermostat
display.
If OFF is selected, the second stage of cooling or heating will turn off
after reaching the 1st stage deadband (see page 13.4 for more
information).
Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

MODE
PROGRAM

Press the MODE button repeatedly
until this setup screen appears.

MODE

Off

Setup

Select On or Off:
On - 2nd stage will
remain on until
setpoint is reached.
Off - 2nd stage will
turn off after reaching
1st stage deadband.

OFF

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

29
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 13.7

SECTION 14

Using the Programmable Output

Carrier

Section 14 Contents:
Configuring a Thermostat Output
Jumper for Programmable
Output Operation...................14.2
Time-Based Control of the
Programmable Output...........14.3
Temperature-Based Control of
the Programmable Output.....14.6
14

Page 14.1

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Setting a Thermostat Jumper for
Programmable Output Operation
To control one of the MISC outputs using time, temperature, or
Internet/phone based operation, place the MISC1, or MISC2, or
MISC3 jumper on the terminal labeled PROG (see diagram below).
This extra output will supply 24VAC to the selected MISC terminal
based on the programming described in the following pages. Only
one of the three outputs (MISC1, MISC2, or MISC3) is required to
have this jumper. For more information regarding the MISC1, MISC2,
and MISC3 outputs, please see section 21.
In the diagram below, the MISC1 jumper has
been set for PROG operation.

GAS

(FAN)

ELEC

PROG

HP
GAS

HUM
DEHUM
ECON
MISC3

MISC2

MISC1

(MISC1
ONLY)

W1
NO HUM

HUM

MISC1
Rs2

MISC2

1 X

RS+5

ECON

Rs1
RSGND

MISC3

INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
9

DEHUM

MISC3

CK1
CKGND

HUM
W2

PROG

MISC2

MISC1

IMPORTANT CAUTION
NEVER PUT MORE THAN ONE JUMPER
ON THE SAME MISC JUMPER BLOCK!
THIS MAY DAMAGE THE THERMOSTAT
AND VOID YOUR WARRANTY
MISC3

MISC3

Page 14.2

(MISC1
ONLY)

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Time-Based Control of the
Programmable Output
To operate one of the MISC outputs using time-based operation, set
Advanced Setup step #30 (below) for Time i8:88. This extra output
will supply 24VAC to the selected MISC terminal, which is especially
useful for devices that require a start and stop time. Refer to page
14.4 - 14.5 for more details on programming this output.
Possible TIME scenarios:
1) An exterior lighting system that needs to be energized every
day between the hours of 8pm and 1am.
2) A sprinkler system that needs to be energized every day
between the hours of 2am and 4am.
MODE
PROGRAM

MODE

OFF

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.
Time = I8:88

Temp = 88

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Aux

I8:88
Press the UP button to
set the programmable
output for time based
operation. The digits in the
clock area will appear.

Setup

30
Press
MODE

Continued on
the next page

Page 14.3

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Time-Based Control of the
Programmable Output
Setup

NC Programmable Output Polarity:

NC = Normally Closed to turn off
between the start and stop times
in steps 34 and 35.
NO = Normally Open to operate
between the start and stop times
NO in steps 34 and 35.

Press
MODE

Setup

7-Day

Select 7-Day or 1-Day
Programming:
7-Day = Different program
for each day.
1-Day = Same program
1-Day
every day.

Day

32
Press
MODE

If Step 32 is set for 1-Day, then Day of the
Week and Copy functions do not appear or apply.
Setup

Select the day of
the week

Press
MODE

Adjust the programmable output start time
for Monday.

7:00
Mo

Start

Setup

(24 Hours)
Press
MODE

Continued on
the next page

Page 14.4

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Time-Based Control of the
Programmable Output
9:00
Mo

Stop

Setup

Adjust the programmable
output stop time for Monday

If Step 32 is set for 1-Day, then Day of the
Week and Copy functions do not appear or apply.

Press
MODE

Yes

Select Yes to copy the
previous day’s program
to this day.

If No is selected:
No

If Yes is selected:

Press
FAN

Selecting Yes, then pressing FAN will copy the
previous day’s program. If yes is selected each
time, this routine will repeat.

If No is selected, as in previous steps, flashing prompts for input will appear for
the start and stop times for the next day.
Press
MODE

Once configuration of the programmable output has been
completed, press the MODE button to move on to the next
setup step, or press the PROGRAM button to exit Advanced
Setup.

Page 14.5

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Temperature-Based Control of the
Programmable Output
To operate a MISC output using temperature-based operation,
program advanced setup step #30 (below) for temperature 88 .
This extra output will supply 24VAC to the selected MISC terminal
based on the temperature of RS1 and the setpoint in step #36 (below).
Possible TEMPERATURE scenario:
1) An exhaust fan in the attic of a store that needs to be energized when the attic temperature is above 85 degrees.
MODE
PROGRAM
MODE

OFF

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.
Time = I8:88

Temp = 88

Aux

Programmable Output Polarity:
NC = Normally Closed to operate
when the setpoint is less than
the setpoint in step #36.
NO = Normally Open to operate
when the setpoint is equal to or
greater than the setpoint in step
NO
#36.
NC

(35-125 )

Press
MODE

Setup

Press
MODE

Setup

Adjust the programmable
output setpoint.

88 3 i
Setup

Press the UP button twice
to set the programmable
output for temperaturebased operation. The
large temperature digits
will appear.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 14.6

Press
PROGRAM

Carrier

Internet/Phone Control of the
Programmable Output
To operate a MISC output using Internet/phone-based operation,
program advanced setup step #30 for Aux (below). This terminal is
especially useful for devices that can be energized via the Internet.
Telephone control may also be available when the thermostat is
connected to the Internet.

Possible REMOTE scenarios:
1) Arm the alarm system in your building after you have left for
the day.
2) Turn off your sign lights after arriving home.
3) Turn on your interior lights while you’re closed.
MODE
PROGRAM

MODE

OFF

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.
Time = I8:88

Temp = 88

Aux
Setup

Press the UP button three
times to set the
programmable output
for Aux (web-based
operation).

AUX
Press
MODE

NC Programmable Output Polarity:

NC = Normally Closed to operate
when programmed to be OFF
through the phone or internet.
NO = Normally Open to operate
when programmed to be ON
NO through the phone or internet.

Setup

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 14.7

Press
PROGRAM

SECTION 15

Programming Remote Sensor Operation
Carrier

Section 15 Contents:
Installing the Remote
Sensors...................................15.2
Controlling or Reading the
Remote Temperature (RS1)...15.3
Averaging the Remote Sensor
(RS1) with the Thermostat
Sensor.....................................15.4
15

Page 15.1

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Installing the Remote Sensors
Up to eight wired or wireless remote sensors may be installed on the
thermostat (RS1) to control the temperature in other rooms. If more
than one sensor is connected to (RS1) the thermostat will average the
sensors to determine the displayed temperature reading. One wired or
wireless remote sensor may be installed to read the outside temperature (RS2). If a sensor(s) is connected to RS1 and is programmed
to control the thermostat, the degree icon on the thermostat will blink
once per second to indicate that a remote sensor reading is being displayed. The wired sensor can be connected to the thermostat with up
to 150’ of 18 ga., 300’ of 20 ga., or 450’ of 22 ga. unshielded, thermostat wire. If multiple sensors are wired to the thermostat, then the
total wiring distance of the furthest sensor should be used in determining the appropriate wire gauge. The wired sensor can be connected to
the thermostat using a two or three wire installation. If a two wire installation is required, then RS+5 must be connected to RSGND (see below).
This wire MUST be completely separated from the thermostat
or any other control wiring and must NOT be in the same
conduit as high voltage wiring.
RS-GND
RS

RS+5

W2
MISC1
RS2
MISC3
RS+5
RS1
RSGND

RS2

RS-GND

W1/O/B
Y1
G
MISC2
CK1
CKGND
R
C

RS-GND

RS+5

RS1-1

RS1-2

RS1-3

RS1-4

See the Remote Sensor accessory for further details.

Page 15.2

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Controlling or Reading the
Remote Temperature (RS1)

The thermostat may be programmed to only READ the remote sensor,
or to CONTROL to the remote sensor. Refer to advanced setup step
#37, below.
Read Only Sensor (RS1): If step #37 is set to only READ to the
remote sensor, the thermostat will not use this sensor for temperature control. This sensor may be viewed by entering advanced
setup (see below) and pressing and holding the MODE button to
scroll backwards one step to setup step #48 (see page 22.4).
Control Sensor (RS1): If step #37 is set to CONTROL to the remote
sensor, the thermostat will ignore the reading of its internal
temperature sensor and only display the temperature reading from
the remote sensor. The degree icon on the thermostat will blink
once per second to indicate that a remote sensor reading is being
displayed.
MODE

PROGRAM

15
MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.
Setup

YES

Optional Remote Sensor:
YES = Control to Remote
Sensor RS1.
NO = Read Only Remote
Sensor RS1.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

37
Remote
Press

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 15.3

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Averaging the Remote Sensor (RS1) with
the Thermostat Sensor
If step #37 is set to control to the remote sensor, the thermostat will
ignore the reading of its internal temperature sensor and only display
the temperature reading from the remote sensor. The degree icon on
the thermostat will blink once per second to indicate that a remote
sensor reading is being displayed.
If step #38 is set to ON (see below), the thermostat will average its
internal sensor with the wired temperature sensor connected to RS1.
If multiple remote temperature sensors are installed on RS1, they will
automatically average together. The temperature displayed will be the
average of the thermostat’s internal sensor and the remote (RS1)
sensor(s).
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

15
On

Off

Optional Remote Sensor
Operation:
ON = Averages thermostat
sensor with Remote
Sensor 1.
OFF
OFF = Does not average
thermostat sensor
with Remote Sensor 1.

Setup

Remote
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 15.4

SECTION 16

Programming the Dry Contact

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Section 16 Contents:
Dry Contact Operation............ 16.2
Dry Contact Polarity.................16.2
Dry Contact Programming.......16.3
Random Start Operation..........16.4

Page 16.1

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Dry Contact Operation
If the dry contact is going to be used, select YES in step #39. If the
dry contact is not going to be used, select NO in step #39 below.
DRY CONTACT POLARITY - The terminals may be set to be
Normally Open (NO) or Normally Closed (NC) in step #40.
If NO is selected the dry contact will operate when it is forced
closed. If NC is selected, the dry contact will operate until it is
forced open.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.
Setup

YES

Set to YES if the dry
contact will be used.
Set to NO if the dry
contact will not be used.

39
Press

MODE

Step 40 appears only if step 39 is “YES”.
Setup

Dry Contact Polarity:
Normally Closed (NC)
Normally Open (NO)

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 16.2

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Dry Contact Programming
OCCUPIED 1 OR SERVICE THE CONDENSATE DRAIN PAN - If
Occupied 1 is selected in step #41 (below), when the dry contact is
energized the thermostat will be forced into Occupied 1 setpoints
and the Occupied 1 icon will blink (Section 6). The thermostat must
be in Program On mode for this feature to have any effect.
If Service Pan is selected, when the dry contact is energized the
thermostat will lockout Y1 (compressor) and write Service Pan on
the display.
Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

MODE
PROGRAM

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

MODE

Step 41 appears only if step 39 is “YES”.
Service Pan

Setup

Select Service Pan to lockout
Y1 when the dry contact is
energized. Select Occupied 1
to enable Occupied 1 setpoints
when the dry contact is
energized.

4i
Press

occupied
1

PROGRAM

Occupied 1

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.
NOTE: If Service Pan is selected and the dry contact was closed at least once, the
Service Pan icon will remain on the display to alert the user that a problem has
occurred. This icon will be cleared once a button is pressed.

Occupied 1

W2
MISC1
RS2
MISC3
RS+5
RS1
RSGND

W1/O/B
Y1
G
MISC2
CK1
CKGND
R
C

Connect wires to a time
clock or other device to
force the thermostat into
Occupied 1.

Service Pan

OR
Page 16.3

W2
MISC1
RS2
MISC3
RS+5
RS1
RSGND

W1/O/B
Y1
G
MISC2
CK1
CKGND
R
C

Connect wires to a device that
will complete the circuit between CK1 and CKGND when the
Condensate Drain Pan is full.

Carrier

Random Start Operation
This feature allows a 2 to 30 second delay before energizing
the thermostat outputs after any of these events:
Loss of Power to the thermostat: When power to the thermostat
is interrupted and then restored, Random Start will lockout the
outputs of the thermostat for a random amount of time. This
delay helps to keep multiple thermostats from energizing their
outputs at the same time after a power outage.
Changing from an Unoccupied time period to an Occupied
time period: If the thermostat is running in the Program On mode
and the start time for an Occupied period forces the thermostat
from Unoccupied to Occupied 1, Random Start will lockout all
outputs of the thermostat for a random amount of time. This
delay helps to keep multiple thermostats from energizing their
outputs at the same time each day.
Closure of the Dry Contact to force Occupied 1 time period:
If step #41 (previous page) is programmed for Occupied 1, then
Random Start will lockout all outputs of the thermostat for a
random amount of time when a Dry Contact closure occurs
(depending on step #40). This delay helps to keep multiple
thermostats from energizing their outputs each time the Dry 16
Contact is used.
Sensing of a light source by the Light Sensor to force
Occupied 1 time period:
If step #42 (page 17.2) is programmed YES for Light Activated
operation, Random Start will lockout the outputs of the thermostat
for a random amount of time when a light source forces the
thermostat into Occupied 1. This delay helps to keep multiple
thermostats from energizing their outputs each time the lights are
turned on.

Page 16.4

SECTION 17

Light Activated Operation

Carrier

Section 17 Contents:
Setting up the Thermostat
for Light Activated
Operation................................17.2
Adjusting the Light Sensor.....17.3

Page 17.1

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Setting up the Thermostat for
Light Activated Operation
A light sensor is provided on the thermostat for light activation. If the
thermostat is set up to be light activated, the thermostat will enter
Occupied 1 and blink the Occupied 1 icon when a light source is
detected. When the thermostat is set up to be light activated, the time
period programming for each day should be set to OFF (Section 6).
The thermostat must be in Program On mode for light activation to
have any effect. Page 17.3 explains how to adjust the light sensitivity
for this type of operation.
NOTE: Light activation does not work in Holiday mode (Section 21).

MODE
PROGRAM

MODE

YES

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

Setup

Select YES if the
thermostat should be
Light Activated.
Select NO to allow only
Time Period Programming
(Section 6).

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

42
17
Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

The Light Sensor is located on
the top of the thermostat.

33CS450-01
Light Sensor

Page 17.2

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Adjusting the Light Sensor
The light sensor can be adjusted for variable degrees of sensitivity.
The sensitivity adjustment screw is located on the side of the
thermostat, as illustrated below. Turning the screw clockwise
increases the sensitivity of the sensor to light.
To check for correct sensitivity, place the thermostat in the Program On
mode. When the lights are on the thermostat should enter Occupied 1
and blink the Occupied 1 icon. If the thermostat does not enter
Occupied 1 while the lights are on, use the supplied screw driver to
turn the light sensor screw clockwise until the Occupied 1 icon appears
on the display. The thermostat should enter an unoccupied period
when the lights are off. If the sensor does not enter an unoccupied
period when the lights are turned off, use the supplied screw driver to
turn the light sensor screw counterclockwise until the Unoccupied icon
appears on the display, with the lights off.
The Light Sensor Adjustment Screw
is located on the side of the thermostat.

Light Sensor
Adjustment Screw
Turn the screw clockwise
to INCREASE light sensor
sensitivity

17
Turn the screw counterclockwise to DECREASE
light sensor sensitivity

Due to varying lighting conditions, light activation may
not be suitable for all installations.

Page 17.3

SECTION 18

Energy Save Operation

Carrier

How to Use the Energy Save Feature
If the thermostat is configured to be programmable (Section 4), and
Energy Save has been selected in step #43 (below), the room will
attempt to reach the selected comfort temperature at the exact time
programmed into the thermostat. Energy Save, or more commonly
known as Smart Recovery, only works when the thermostat enters
Occupied 1 from Unoccupied. For example, if the Unoccupied
program is set for 6pm at 55°F heating and 85°F cooling, and the
Occupied 1 program is set for 8am at 72°F heating and 75°F cooling,
the thermostat will turn the system on before 8am in an effort to bring
the temperature to its correct setting at exactly 8am.
The P374-2900 learns from experience, so please allow 4-8 days
after a program change or after initial installation to give Energy Save
time to adjust to local weather, the construction of your business, and
your heating and cooling system.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.
Setup

Select Energy Save
on or off.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

OFF

Press
Off

PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 18.1

SECTION 19

Programming Run-Time Alerts

Carrier

Section 19 Contents:
Setting and Resetting the
Service Filter (Fan Run-Time)
Alerts........................................19.2
Setting and Resetting the UV
Light Run-Time Alerts.............19.3
Setting and Resetting the
Humidify Run-Time Alerts......19.4

Page 19.1

Carrier

How to Set and Reset the Service Filter
(Fan Run-Time) Alert
This counter keeps track of the number of hours of fan run-time
whether the fan is energized in the Heating or Cooling modes, or in
stand alone fan operation. The Service Filter icon will appear after the
preset number of hours of fan run-time in step #45 (below) has been
achieved. Setting this counter to zero in step #45 will prevent the
Service Filter icon from ever appearing.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.
Hours the fan has
run since last reset

Press

Reset the counter to 0 to
remove the Service Filter
icon from the display.

Setup

Service Filter

FAN

Press

Adjust the number of
hours, in increments of
50, the fan will run
before the Service
Filter icon appears on
the display. 0 = off.

0
Service Filter

Setup

MODE

Press
PROGRAM

(0 - 1950 hours)

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 19.2

Carrier

How to Set and Reset the UV Light
Run-Time Alert
This counter keeps track of the number of days since the UV Light
counter has been reset. The UV Light icon will appear after the
number of days has been achieved, as shown in step #46 (below).
Setting the counter to zero in Step #46 will prevent the Service UV
Light icon from ever appearing.

MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.
Press the MODE button repeatedly
until this setup screen appears.

Days since the UV Light
icon has been reset

Press

Reset the counter to 0 to
remove the Service UV
Light icon from the display.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Setup

Service
UV Light

FAN

MODE

Press the MODE button repeatedly
until this setup screen appears.

19
Adjust the number of days
in increments of 10 before
the UV Light icon appears
on the display. 0 = off.

Service
UV Light

(0 - 1990 days)

Press
PROGRAM

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

Page 19.3

Carrier

How to Set and Reset the Humidifier
Run-Time Alert
This counter keeps track of the number of days since the Service
Humidify icon was last reset; this icon will appear after the number of
days set in step #47 (below) has elapsed. Setting this counter to zero
in step #47 will prevent the Service Humidify icon from ever appearing.
MODE
PROGRAM

MODE

Press the MODE button. While holding
the MODE, press the PROGRAM
button to enter Setup screens.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until this setup screen appears.

Days since the last reset
of the Service Humidify
counter.

Press Reset the counter to 0 to
remove the Service Humidify
icon from the display.

0
Service

Setup

Humidify

FAN

MODE

Press the MODE button repeatedly
until this setup screen appears.

0
Adjust the number of days
in increments of 10 before
the Service Humidify icon
appears.
0 = Off

Service

Setup

Humidify

47
Press
PROGRAM

(0 - 1990 days)

Press the PROGRAM button to leave the Setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

The humidifier run-time alert does not take the place of
any humidifier manufacturer’s recommended maintenance
plan; it only serves as a helpful reminder.

Page 19.4

SECTION 20

Programming Holiday Mode

Carrier

When the thermostat is programmed for a Holiday mode, it will take
effect at 12:00 am of the next day. In order for the Holiday mode to
take effect the thermostat must be in the Program On mode.
The thermostat will control to the Unoccupied cooling and heating
setpoints set in Section 6, pages 6.2 and 6.3.
Holiday setpoints will be enforced for the number of days specified in
step #1 (0 - 99 days).
Press
HOLIDAY

Press the HOLIDAY button to enter
the Holiday programming setup
steps.

Setup

Select the number of days
that the Holiday schedule
will be in effect. A value
of 0 disables Holiday
mode.
(0 - 99 days)

I
y

Press
HOLIDAY

Press the HOLIDAY button to exit the setup screens. If no buttons are
pressed, the display will leave the setup screens after 30 seconds.

You cannot set the Heat setpoint any higher than the Cool setpoint minus
the deadband setting in Advanced Setup step #22 on page 13.2.

Page 20.1

Carrier

Programming Holiday Mode (continued)
HOLIDAY DISPLAY - When the thermostat is placed into the
Holiday mode, the thermostat will display the screen shown below.

To return the thermostat to normal operation from Holiday mode, press
the HOLIDAY button and adjust the number of days in step #1 to zero
(see previous page).
Press the HOLIDAY button to return to normal operation.

Overriding the Holiday Mode
Pressing the OVERRIDE
button during Holiday Mode
will temporarily force the
thermostat into Occupied 1
comfort settings for 30 min.
The remaining Override time
will alternate with the clock
7:56 Pm
display.
The Override timer can be
Program On
:30
set up to a maximum of four
We
(4:00) hours, in increments
of 30 minutes. If the timer
occupied
1
has been set for the maxOverride
imum time, the next press of
the OVERRIDE button will
reset the timer, returning the
thermostat to the correct time
period program for the day.

y
Press
OVERRIDE

65 72

Page 20.2

COOL
HEAT

SECTION 21

Configuring the MISC Outputs

Carrier

Section 21 Contents:
Configuring the Jumpers........21.2
Explanation of Jumper
Settings..................................21.3

Page 21.1

Carrier

Configuring the Jumpers
For additional flexibility, your thermostat has three configurable
outputs. These outputs are designed to have different functions
depending on how the jumpers are set (below).
Each output, labeled MISC1, MISC2, and MISC3 may be set for one
of the five choices available.
In the diagram below, the MISC3 jumper has been set for HUM*
(humidification) operation, the MISC2 jumper has been set for
DEHUM* (dehumidification) operation, and the MISC1 jumper has
been set for PROG (programmable) operation.

GAS

(FAN)

ELEC

PROG

GAS

HUM
DEHUM
ECON
MISC3

MISC2

MISC1

(MISC1
ONLY)

W1
NO HUM

HUM

MISC1
RS2

MISC2

1 X

Rs1

MISC3

RSGND

MISC2

ECON

RS+5
INSTALL HUMIDITY
MODULE WITH SENSING
ELEMENT OUTWARD
5

DEHUM

MISC3

CK1
CKGND

HUM
W2

MISC1

(MISC1
ONLY)

*The Humidity Module (sold separately) must
be installed to operate a humidification
and/or dehumidification system.

CAUTION
NEVER PUT MORE THAN
ONE JUMPER ON THE SAME
MISC JUMPER BLOCK!

DOING SO MAY DAMAGE
YOUR THERMOSTAT.
MISC3

Page 21.2

MISC3

Carrier

Explanation of Jumper Settings
W3 JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to W3, the corresponding MISC screw terminal
on the backplate will control a third stage of heat.

W3 MULTI-STAGE OPERATION EXPLAINED - PAGE 13.4
The 3rd Stage of Heat is turned on when:
(A) The 1st and 2nd stages have been on for the time required (steps 27
and 28, page 13.6). It is adjustable from 0-60 minutes and the default
And
is two minutes.
(B) The temperature from the setpoint is equal to or greater than: the setpoint plus the 1st stage deadband (step #24, 13.5), plus the 2nd stage
deadband (step #25, 13.5) plus the 3rd stage deadband (step #26,
13.5). This 3rd stage deadband is adjustable from 0-10 degrees and
the default is two degrees.
Cooling

Heating

3rd Stage
turn on

Deadband

db 3
(adj. 0-10 )

db 2
(adj. 0-10 )

db 1
(adj. 1-6 )

db 2
(adj. 0-10 )

2nd Stage
turn on

1st Stage
turn on

DECREASE

Heat
Setpoint

Cool
Setpoint

TEMPERATURE

1st Stage
turn on

2nd Stage
turn on

INCREASE

PROG JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to PROG, the corresponding MISC screw
terminal on the backplate will control a pilot relay or other accessory.

PROGRAMMABLE OUTPUT - SECTION 14
This jumper setting allows the MISC outputs to control a pilot relay by time,
temperature, or a signal from the Internet/Phone. The following are three
possible scenarios:
By Time: A device that requires a start and stop time. For example,
21 an exterior lighting system that needed to be energized every day
between the hours of 8pm and 1am.
By Temperature: An exhaust fan that needs to energize whenever
the temperature from RS1 rises above 90 degrees F.
By Remote: Remotely arming a security system through the web or phone.

Page 21.3

Carrier

Explanation of Jumper Settings (continued)
HUM JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to HUM, the corresponding MISC screw
terminal on the backplate will control a humidification system.

HUMIDIFICATION OPERATION - SECTION 9
If your HVAC unit is equipped with a humidification system and the Humidity
Module (sold separately) has been installed, the thermostat will provide power
to the MISC1, MISC2, or MISC3 terminal of the thermostat when the humidity in
the home falls below the humidity setpoint you have chosen. The value for this
setpoint ranges from 0% to 60%. If no humidity is desired or if a humidification
system has not been installed, set the value to 0%.

DEHUM JUMPER SETTING
If the jumper for MISC1, MISC2, or MISC3 is set to DEHUM, the corresponding MISC screw
terminal on the backplate will be connected to the dehumidification terminal of a furnace board.
NOTE: Not all furnaces have a dehumidification terminal.

DEHUMIDIFICATION OPERATION - SECTION 10
If your HVAC unit is equipped with a dehumidification system the thermostat will
operate in one of two ways.
1) Normally Closed (NC): The thermostat will de-energize the MISC1, MISC2,
or MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the building is above the dehumidify setpoint you have
chosen and there is a call for 1st stage cooling.
2) Normally Open (NO): The thermostat will energize the MISC1, MISC2, or
MISC3 terminal of the thermostat (this MISC terminal is connected to the
DEHUM terminal on your furnace) to allow the fan to run in low speed when
the humidity in the building is above the dehumidify setpoint you have
chosen and there is a call for 1st stage cooling.

Page 21.4

Carrier

Explanation of Jumper Settings (continued)
ECON JUMPER SETTING
If the jumper for MISC2 or MISC3 is set to ECON, the corresponding MISC screw
terminal on the backplate will be connected to an economizer.

ECONOMIZER OPERATION - If your HVAC unit is equipped with an
economizer system, the thermostat will provide power to the MISC2 or
MISC3 terminal of the thermostat when the thermostat is in an occupied
time period. The MISC2 or MISC3 terminal will be de-energized when the
thermostat is in an unoccupied time period.

Y2 JUMPER SETTING
If the jumper for MISC1 is set to Y2 the MISC1 screw terminal on the backplate will control a
second stage of cooling.

Y2 OPERATION - SECTION 13
Control up to two Cool stages.
The 2nd Stage of cool is turned on when:
(A) The 1st Stage has been on for the time required (step #27,
page 13.6). It is adjustable from 0-60 minutes and the default
is two minutes.
And
(B) The temperature spread from the setpoint is equal to or greater
than: the setpoint plus the deadband (step #24, page 13.5), plus
the 2nd deadband (step #25, page 13.5). This 2nd deadband is
adjustable from 0-10 degrees and the default is two degrees.
Cooling

Deadband

db 1
(adj. 1-6 )

db 2
(adj. 0-10 )
1st Stage
turn on

Cool
Setpoint

TEMPERATURE

INCREASE

Page 21.5

2nd Stage
turn on

SECTION 22

Factory Defaults, Calibration, and Sensors
Carrier

Section 22 Contents:
Resetting the Thermostat to the
Factory Default Settings........22.2
Calibrating the Temperature
and Humidity Sensors...........22.3
Viewing the Remote
Temperature Sensors............22.4

22
Page 22.1

Carrier

Resetting the Thermostat to the
Factory Default Settings (for default values see page 24.1)
If, for any reason, you desire to return all the stored settings back to
the factory default settings, follow the instructions below.
WARNING: This will reset all Time Period and Advanced
Programming to the default settings. Any information entered
prior to this reset may be permanently lost.

I2:00
Su
MODE

MODE

FAN

Place the thermostat in the
OFF mode.

Press and hold the MODE
button. While holding the
MODE button, press and hold
the FAN button for 5 seconds.
All icons will appear on the
display.

FAN

After all of the icons appear,
release the MODE and FAN
buttons. Then press and hold
the FAN button for 5 seconds.

MODE

After the letters Fd appear on
the display (Factory Default),
release the FAN button. Press
the MODE button once to
return to normal operation.

OFF

72
88
I88 88
Pm

I8:88

Am Program On Setup
Pm StartStop
HI
SuMoTuWeThFrSa DeHumidify
Service Filter
Pan UV Light

AUTO
OFFON

COOL
Outside
Remote

AUXHEAT

Unoccupied
123
Override
FanOn

I2:00
Su
OFF

Page 22.2

Carrier

Calibrating the Temperature and Humidity Sensors
Under normal circumstances it will not be necessary to adjust the
calibration of the temperature and humidity sensors. If calibration is
required, please contact a trained HVAC technician to correctly
perform the following procedure.

I2:00
Su
MODE

MODE

FAN

Place the thermostat in the
OFF mode.

Press and hold the MODE
button. While holding the
MODE button, press and hold
the FAN button for 5 seconds.
All icons will appear on the
display.

OFF

72
88
I88 88
Pm

I8:88

Am Program On Setup
Pm StartStop
HI
SuMoTuWeThFrSa DeHumidify
Service Filter
Pan UV Light

AUTO
OFFON

COOL
Outside
Remote

AUXHEAT

Unoccupied
123
Override
FanOn

PRESS

THERMOSTAT SENSOR
Press the UP and DOWN buttons
at the same time twice. The
thermostat temperature will be
displayed and may be calibrated
using the UP or DOWN buttons.

CALIBRATE

TWICE

REMOTE SENSOR

MODE

Press the MODE button once. The
remote sensor temperature will be
displayed and may be calibrated using the
UP or DOWN buttons. If a remote sensor
is not installed, a temperature reading
-127 degrees will appear.

Remote

CALIBRATE

HUMIDITY SENSOR
MODE

Press the MODE button once. The
relative humidity at the thermostat will be
displayed and may be calibrated using the
UP or DOWN buttons.

CALIBRATE

22
After calibration is complete, press the MODE button once to save your
changes and return to normal operation.

Page 22.3

Carrier

Viewing the Remote Temperature Sensors
Each sensor is programmed with a “hard-coded” address that the
thermostat “scans” in order from lowest to highest. Therefore, in
order to determine which sensor corresponds to the number on the
setup screen you will need to disconnect each sensor from the group
in order to determine which sensor number reads dashes.
Press the MODE button. While holding the MODE,
press the PROGRAM button to enter Setup screens.

MODE
PROGRAM

MODE

Remote
Sensor #1.

Note: Press the MODE
button momentarily
to move through the
setup screens. Press
and hold the MODE
button to move backwards through the
setup screens.

Press the MODE button repeatedly
until setup step #48 appears.

72
48
68
48
76
48
80
48
65
Setup

Remote

Remote
Sensor #2

Remote

Setup

Remote

Remote
Sensor #3

Setup

Remote
Sensor #7

Remote

Setup

Remote

Remote
Sensor #4

72
48
70
48
73
Setup

Remote
Sensor #6

Setup

Remote
Sensor #8

Remote

Setup

Remote

Remote
Sensor #5

Setup

Remote

Page 22.4

PROGRAM

Press the MODE button to
return to normal operation.

SECTION 23

Accessories

Carrier

ACCESSORY PORT - The RJ11 Jack is used to connect the
33CS450-01 to the IR Receiver P/N 33CSIRRCVR-01 for wireless
communication or the EZ Programmer P/N 33CSPGMR-01
for easy downloading or uploading of thermostat information.
The Accessory Port is located on
the bottom of the thermostat.

RJ11 Type Jack

IR RECEIVER / REMOTE CONTROL (optional accessory) - When the
IR Receiver is connected, the thermostat can be controlled using
an IR Remote Control. The thermostat may also interface with
other wireless systems in your home. For more information see the
instruction sheet for the IR Receiver (33CSIRRCVR-01).
EZ PROGRAMMER (optional accessory) - When the EZ Programmer
is connected, the thermostat Time Period Programming and
Advanced Setup Programming can be stored into the EZ
Programmer’s memory. This information can then be uploaded to
other 33CS250-01 thermostats. For more information see the
instruction sheet for the P/N 33CSPGMR-01.

23
Page 23.1

SECTION 24

Advanced Setup Table
Step#

Description

1 Programmable
Thermostat
2 Auto-Changeover
Thermostat
3 Fan Off Delay
4 Fan Purge
5 Thermoglow
Backlight
6 F or C
7 Security Level
8 Max Heat Setpoint
9 Min Cool Setpoint
10 Cool to Dehumidify
11 Maximum Dehum
Overshoot
12 Reheat Operation
13 DEHUM Terminal
Polarity
14 Energy Watch Heat Timer
15 Energy Watch Cool Timer
16 Override Run-Time
17 Reset Service
Humidify Icon
18 Reset UV Light Icon
19 Heatpump Jumper
Setting
20 Reversing Valve
Jumper Setting
21 Electric Heat
22 Minimum Heat/Cool
Differential
23 Cycles Per Hour
24 Deadband/Temp.
Swing 1st Stage
25 Deadband/Temp.
Swing 2nd Stage
26 Deadband/Temp.
Swing 3rd Stage

Pg# Range Df* Step#
4.2 Yes/No
4.3 Yes/No
7.3 0, 30, 60,
90
7.4 0 - 3 hrs.
8.2 Auto/On/
Off
8.2 F/C
8.4 0 - 3
8.4 35 - 99
8.4 35 - 99
10.4 On/Off
10.4 0 - 5
10.5 On/Off
10.6 NO/NC
11.2 read only
11.3 read only
11.4 read only
11.5 read only
11.6 read only
12.2 read only
12.2 read only
12.3 read only
13.2 0 - 6
13.3 d1, d, 2-6
13.5 1 - 6
13.5 0 - 10
13.5 0 - 10

Description

Pg# Range Df*

Yes 27 Minutes Between
13.6 0-60min
Stage 1 & 2
Yes 28 Minutes Between
13.6 0-60min
Stage 2 & 3
29 2nd Stage turn off at 13.7 On/Off
0
setpoint
30 Programmable
14.3 Off/Time/
0
Output
Temp/Aux
Au14.4 NO/NC
to 31 Programmable
Output Polarity
F
32 7 Day/1 Day
14.4 7Day/
0
1Day
Programmable Output
80
65 33 Programmable Output 14.4 Mo - Su
Output Day of the Week
Off
34 Programmable Output 14.4 24 Hour
3
Start Time
Off 35 Programmable Output 14.5 24 Hour
Stop
Time
NC
36 Programmable Output 14.6 35 -125
Temp. Setpoint
-37 Thermostat control 15.3 Yes/No
to RS1?
-38 Thermostat Sensor 15.4 On/Off
Averaging
-16.2 Yes/No
- - 39 Dry Contact
Operation
NO/NC
Dry
Contact
Polarity
40
16.2
-16.3 Occ. 1/
- - 41 Dry Contact
Service
Programming
Pan
-42 Light Activated
17.2 Yes/No
18.1 Off/On
- - 43 Energy Save
44 Reset Service Filter 19.2 read only
2
Icon
45 Service Filter Run
19.2 0 - 1950
6
Time Set
2
46 UV Light Run-Time 19.3 0 - 1990
Set
2
47 Service Humidify
19.4 0 - 1990
Run-Time
Set
2
48 Viewing the Remote 22.4 - Sensor
Temperature(s)

*Df = Factory Default Setting

Carrier

Page 24.1

2
2
Off
Off
NO
7
Mo
7am
9pm
80
No
Off
Yes
NO
Occ.
1
No
Off
-0
0
0
--

Carrier

SECTION 25

A
Accessory Port, 23.1
Alerts
see Run-Time
Auto
adjust temperature,
1.4, 4.8
changeover, 2.3, 4.5,
4.7, 24.1
differential, see
Differential
fan, 7.2
icon, 2.3
lockout, 4.3
mode, 1.3
AuxHeat icon, 2.5
Average
remote sensors, 15.4
thermostat sensor,
15.4
automatically, 15.4

B
b reversing valve, 12.2
Buttons
down, 1.2, 2.2, 8.3,
12.4
fan, 1.4, 2.2, 7.2,
12.4, 22.2

Index

front panel, 2.2
humidity, 2.2, 5.3,
9.4, 10.4
Holiday, 2.2, 5.2,
15.3, 20.1
mode, 1.3, 2.2, 4.2,
8.3, 22.2
outside, 2.2, 5.2
Override, 2.2, 6.6
up, 1.2, 2.2, 8.3,
12.4

C
C, 8.2, 24.1
Calibration, 22.3
Celsius, 8.2
Clock
display, 2.3
setting, 1.2, 3.2
Compressor Lockout,
13.3
Cool
1st stage
deadband, see
Deadband
dehum, 10.6
minutes of runtime, 13.4,
13.6, 24.1
2nd stage
deadband, see
Deadband

Page 25.1

dehum, 10.6
minutes of runtime, 13.4, 13.6
21.5, 24.1
turn off
temperature,
13.7, 24.1
Y2 operation, 21.5
deadband, see
Deadband
droop, see Deadband
electric/heat pump,
12.2
icon, 2.3
indicator, 2.2
mode, 1.3
overshoot, see
Overshoot
program, see Program
run-time, see Run-Time
setpoint, 1.3-1.4,
6.2-6.5
to dehumidify, see
Dehumidify
Condensate Drain Pan,
2.5, 16.3
Copy Function
see Program
Cycles Per Hour, 13.3,
24.1

D
Day,

Carrier

SECTION 25

display, 2.4
setting, 1.2, 3.2
Deadband
1st stage, 13.4-13.5,
24.1
2nd stage, 13.4-13.5,
21.3, 21.5, 24.1
3rd stage, 13.4-13.5,
21.3, 24.1
Dehumidify
cool to, 10.4, 24.1
Aux icon, 2.5, 10.5
DEHUM jumper,
10.6
icon, 2.5
setpoint, 10.3
Delay
fan-off, see Fan
time between stages,
see Time Delay
Differential
heat and cool, 13.2,
24.1
humidify and
dehumidify, 9.2,
10.2
Disabled Keypad
see Keypad Lockout
Drain Pan Overflow
Alarm, see Dry Contact
Dry Contact
occupied 1, 16.3, 24.1
operation, 16.2,
24.1
polarity, 16.2, 24.1

Index

service pan, 16.3
Random start, 16.4

E
Economizer
ECON, 21.5
operation, 21.5
EH, 12.4
Electric Heating
AuxHeat icon, 2.5
jumper setting, 12.3
24.1
reheat, 10.5
W2, 10.5
Emergency Heat,
12.4
Energy Save, 18.1
Energy Watch
cool, 11.3, 24.1
heat, 11.2, 24.1
EZ Programmer, 23.1

F
F, 8.2, 24.1
Factory Defaults
caution, ii
settings, 22.2
resetting, 22.2
Fahrenheit, 8.2

Page 25.2

Fan,
button function, see
Buttons
off time delay, 7.3,
24.1
on during heat, see
Electric Heat
on icon, 1.4, 2.4, 7.2
purge, 7.4, 24.1
run-time, 19.2
2nd stage heat, see
Emergency Heat
speed, see Dehumidify
unoccupied, 7.2
Fd, 22.2
Flashing Selection, 1.2

G
Gas Furnace
control the fan, 12.3
jumper, 12.2
Green Indicator, 2.2

H
Heat
1st stage
deadband, see
Deadband
emergency heat,

Carrier

SECTION 25

12.4
minutes of runtime, 13.4, 13.6,
24.1
2nd stage
deadband, see
Deadband
emergency heat,
12.4
minutes of runtime, 13.4, 13.6,
24.1
3rd stage
deadband, see
Deadband
W3, 21.3
AuxHeat icon, 2.5
deadband, see
Deadband
droop, see Deadband
electric/heat pump,
12.2-12.3
icon, 2.3
indicator, 2.2
mode, 1.3
program, see Program
run-time, see RunTime
setpoint, 1.3-1.4,
6.2-6.3
Heat Pump
AuxHeat, 2.5
emergency heat,
12.4
jumper setting, 12.2

Index

Hi
icon, 2.5, 5.2
security setpoint, 8.4
temperature, 5.2
Holiday
button, see Buttons
light activation, 17.2
mode, 20.1-20.2
programming, 20.120.2
setpoints, 21.1
Humidify
icon, 2.5
service, 11.5, 19.4,
24.1
setpoint, 9.3
Humidity Module
connector, 9.2
installation, 9.2
jumper setting, 9.2
required for, 5.3,
9.1, 9.3, 10.1-10.3,
21.4, 22.3

I
Internet-based
Operation,
see Programmable
Output
IR Receiver, 23.1
IR Remote Control,
23.1

Page 25.3

J
Jumpers
DEHUM, 21.4
ECON, 21.5
ELEC, 12.3
electric heat, 12.3,
24.1
gas electric, 12.2, 24.1
heat pump, 12.2, 24.1
HUM, 9.2, 21.4
programmable output,
14.2
reversing valve, 12.2,
24.1
W3, 21.3
Y2, 21.5

K
Keypad Lockout, 2.4,
8.3

L
LCD, 2.2
Light
activated, 17.2-17.3,
24.1

TOTALINE
Carrier

SECTION 25

random start, 16.4
sensor, 17.2
adjustment, 17.3
Locked Indication
see Keypad Lockout
Lo
icon, 2.5, 5.2
security setpoint, 8.4
temperature, 5.2

M
Manual
changeover, 4.4, 4.6
cool, 4.3
heat, 4.3
Maximum Outdoor
Temperature, see Hi
Minimum Outdoor
Temperature,
see Lo
MISC
jumper, see Jumpers
output, 21.2-21.5
Mode, 1.3, 2.3
Multi-stage
Operation, 13.4

N
Non-Programmable

Index

Thermostat, 4.2,
4.4-4.5
Normally
Open/Closed,
dry contact, 16.2
programmable
output, 14.4,
14.6-14.7
dehum terminal,
10.6

O
O Reversing Valve,
12.2
Occupied 1
daily schedule, see
Program
Dry contact, 16.3
economizer
operation, 21.5
energy save, 18.1
icon, 1.3, 2.4
light activated, 17.217.3
mode, 1.3, 4.6-4.7
override, 6.6
programming, 6.26.5
programming
worksheet, back
page
random start, 16.4

Page 25.4

Off Mode, 1.3, 2.3
Outdoor,
see Outside
Outside
button, see Buttons
icon, 2.3
sensor, 2.3, 5.2, 13.113.2, 15.2, 22.4
viewing temperature,
2.3, 5.2, 22.4
Override
button, see Buttons
daily schedule, 6.6
icon, 2.3
timer, 6.6
viewing run-time,
11.4, 24.1
Overshoot, 10.4, 24.1

P
Pan, Service
see Dry Contact
Phone-based operation
see Programmable
Output
Polarity, see Dry Contact
Preoccupancy Fan
Purge Timer, see Fan
Program,
copy, 6.4-6.5

Carrier

SECTION 25

daily schedule, 6.2-6.4
mode, 1.3, 4.4-4.8
on at all times, 8.4
On icon, 2.3
override, see Override
setpoint limits, 8.4
tips, 6.5
worksheet, back page
Programmable Output
Internet/phone
control, 14.7
jumper setting, 14.2,
21.3
temperature-based
control, 14.6
time-based control,
14.3
Programmable
Thermostat, 4.2

R
Random Start, 16.4
Red Indicator, 2.2
Reheat
during cool to
dehumidify, 10.5
electric heating, 10.5
function, 10.5
W2, 10.5
Remote Sensor

Index

averaging, 15.4
calibrate, 22.3
Control to, 15.315.4, 22.1
degree icon blink,
15.2-15.4
icon, 2.5
outside temperature,
see Outside
read to, 15.3
viewing, 22.4, 24.1
wiring, 15.2
Reset
thermostat settings,
see Factory Defaults
run-time
fan/filter, 19.2,
24.1
humidify, 19.4,
UV light, 19.3,
24.1
RS1, see Remote
Sensor
RS2, see Outside
Sensor
Run-Time
resetting, see Reset
setting,
humidifier, 19.4,
24.1
service filter, 19.2
24.1
UV light, 19.3,
24.1
viewing,

Page 25.5

cool, 11.3, 24.1
heat, 11.2, 24.1
Humidification,
11.5, 24.1
override, 11.4,
UV light, 11.6

S
Schedule, Daily,
see Program
2nd stage turn off
temperature,
13.7, 24.1
Security
level, 8.4, 24.1
setpoints, 8.4, 24.1
Sensor
outside, see Outside
remote, see Remote
thermostat, see
Thermostat
Service
filter icon, see Reset
humidify icon, see
Reset
pan icon, see Dry
Contact
UV light, see Reset
Set Clock, see Clock
Setpoint
cool, see Cool
dehumidification, 10.3

Carrier

SECTION 25

10.5-10.6
heat, see Heat
holiday, 20.1
humidification, 9.4
occupied, 6.2
programmable output,
14.6
security, 8.4
unoccupied, 6.2-6.3
Setup Icon, 2.4
Simplest Operation,
4.2-4.3
Smart Fan, 7.2
Smart Recovery, see
Energy Save

T
Terminal, MISC, see
MISC
Thermostat Sensor
averaging, 15.4, 24.1
calibrate, 22.3
Time, see Clock
Time Delay,
compressor lockout,
13.3
cycles per hour,
13.3, 24.1
1st to 2nd stage,
13.6, 24.1
2nd to 3rd stage,
13.6, 24.1

Index

Time Schedule, see
Program

U
Unoccupied
icon, 2.3
operation, 6.5
override, see
Override
setpoint, 6.2-6.3
UV Light
icon, 2.5
resetting, see Reset
run-time, see RunTime
setting, see Run-Time

W
W3, see Jumpers
Warranty, 26.1
Web, 14.7

Y
Y2, see Jumpers

Page 25.6

Section 26

Warranty

Carrier

Five-Year Warranty - This Product is warranted to be free from defects in material and
workmanship. If it appears within five years from the date of original installation, whether or
not actual use begins on that date, that the product does not meet this warranty, a new or
remanufactured part, at the manufacturer’s sole option to replace any defective part, will be
provided without charge for the part itself provided the defective part is returned to the
distributor through a qualified servicing dealer.
THIS WARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred for diagnosing,
repairing, removing, installing, shipping, servicing or handling of either defective parts or
replacement parts. Such costs may be covered by a separate warranty provided by the installer.
THIS WARRANTY APPLIES ONLY TO PRODUCTS IN THEIR ORIGINAL INSTALLATION
LOCATION AND BECOMES VOID UPON REINSTALLATION.
LIMITATIONS OF WARRANTIES – ALL IMPLIED WARRANTIES (INCLUDING IMPLIED
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY) ARE
HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIMITED WARRANTY
IS GIVEN. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED
WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESSED
WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED,
ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON
WHATSOEVER.
ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING
NORMAL WORKING HOURS. ALL REPLACEMENT PARTS, WHETHER NEW OR
REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING
TIME PERIOD OF THIS WARRANTY.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the installation and servicing instructions or owner’s
manual, including filter cleaning and/or replacement and lubrication.
2. Damage or repairs required as a consequence of faulty installation, misapplication, abuse,
improper servicing, unauthorized alteration or improper operation.
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other
damages due to the inadequacy or interruption of electrical service.
4. Damage as a result of floods, winds, fires, lightning, accidents, corrosive environments or
other conditions beyond the control of the Manufacturer.
5. Parts not supplied or designated by the Manufacturer, or damages resulting from their use.
6. Manufacturer products installed outside the continental U.S.A., Alaska, Hawaii, and
Canada.
7. Electricity or fuel costs or increases in electricity or fuel costs for any reason whatsoever
including additional or unusual use of supplemental electric heat.
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL
DAMAGE OF ANY NATURE WHATSOEVER. Some states do not allow the exclusion of
incidental or consequential damages, so the above may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which may vary
from state to state.

Page 26.1

Programming Worksheet

see Section 6

DAY PERIOD
START TIME COOL HEAT
Unoccupied
M
O
N
D
A
Y
T
U
E
S
D
A
Y

W
E
D
N
E
S
D
A
Y
T
H
U
R
S
D
A
Y
F
R
I
D
A
Y
S
A
T
U
R
D
A
Y

S
U
N
D
A
Y

Occupied 1
Occupied 2
Occupied 3
Unoccupied

Copy Mon

Tue

Occupied 1

Occupied 2

Yes

Occupied 3
Unoccupied

Copy Tue

Wed

Occupied 1

Occupied 2

Yes

Occupied 3
Unoccupied

Copy Wed

Thu

Occupied 1

Occupied 2

Yes

Occupied 3
Unoccupied

Copy Thu

Fri

Occupied 1

Occupied 2

Yes

Occupied 3
Unoccupied

Copy Fri

Sat

Occupied 1

Occupied 2

Yes

Occupied 3
Unoccupied

Copy Sat

Sun

Occupied 1

Occupied 2

Yes

Occupied 3

Printed on recycled paper.
P/N 88-506 Rev. 5

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Page Count                      : 113
Create Date                     : 2006:06:27 14:17:54
Modify Date                     : 2006:06:27 14:17:54
Producer                        : Corel PDF Engine Version 11.633
Author                          : John B. Peil
Creator                         : CorelDRAW Version 11.0
Title                           : Manual Carrier 33CS450-01 Rev. 5

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Carrier 33Cs450 01 Users Manual Rev. 5

33CS450-01 88-506

33cs45001 1047e247-1463-4055-9cb3-271a98bceb57 Carrier Thermostat 33CS450-01 User Guide |

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