Random Start. Carrier 33CS400-01

This feature causes 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.

Closure of the Dry Contact to force Heat, Cool or Auto Modes:

If step #24 (page 14.3) is programmed for Override, 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 #23, page 14.2). This delay helps to keep

multiple thermostats from energizing their outputs each time the

Dry Contact is used.

14

Page 14.5

SECTION 15

Section 15 Contents:

Setting and Resetting the

Service Filter (Fan Run-Time)

Alert........................................15.2

Setting and Resetting the UV

Light Run-Time Alert.............15.3

Setting and Resetting the

Humidify Run-Time Alert......15.4

15

Page 15.1

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 #28 (below) has been achieved. Setting this counter to zero in step #28 will prevent the

Service Filter icon from ever appearing.

RESET

FILTER

Press

Press the RESET FILTER button to enter this setup screen.

Hours the fan has run since last reset

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

0

Service Filter

Setup

27

Note: Press the MODE button momentarily to move through the setup screens. Press and hold the MODE button to move back- wards through the setup screens.

FAN

Press

MODE

15

0

Adjust the number of hours, in increments of

50, the fan will run before the Service

Filter icon appears on the display. 0 = off.

Service Filter

(0 - 1950 hours)

Setup

28

Press

HUMIDITY

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

Page 15.2

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 #29 (below).

Setting the counter to zero in Step #29 will prevent the Service UV

Light icon from ever appearing.

MODE

HUMIDITY

MODE

Press the MODE button. While holding the MODE, press the HUMIDITY 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 back- wards through the setup screens.

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.

FAN

0

Service

UV Light

Setup

I3

15

MODE

Press the MODE button repeatedly until this setup screen appears.

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

0

Service

UV Light

(0 - 1990 days)

Setup

29

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

Page 15.3

Press

HUMIDITY

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 #30 (below) has elapsed. Setting this counter to zero in step #30 will prevent the Service Humidify icon from ever appearing.

MODE

HUMIDITY

MODE

Press the MODE button. While holding the MODE, press the HUMIDITY 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 back- wards through the setup screens.

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.

Service

0

FAN

15 MODE

Humidify

Setup

Press the MODE button repeatedly until this setup screen appears.

I2

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

0 = Off

(0 - 1990 days)

Service

0

Humidify

Setup

30

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

Press

HUMIDITY

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 15.4

SECTION 16

Section 16 Contents:

Configuring the Jumpers........16.2

Explanation of Jumper

Settings..................................16.3

16

Page 16.1

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 four 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 Y2 (second stage cooling) operation.

16

HUM

DEHUM

ECON

MISC3 MISC2 MISC1

Y2

(MISC1

ONLY)

W1

Y1

G

MISC2

CK1

CKGND

R

C

INSTALL HUMIDITY

MODULE WITH SENSING

ELEMENT OUTWARD

ELEC

GAS

HP

GAS

B

O

W2

MISC1

RS2

MISC3

RS+5

Rs1

RSGND

HUM

DEHUM

ECON

MISC3 MISC2 MISC1

Y2

(MISC1

ONLY)

*The Humidity Module (sold separately)

must be installed to operate a humid-

ification 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 16.2

MISC3

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 8

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 9

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

16

speed when the humidity in the home 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 home is above the dehumidify setpoint you have chosen

and there is a call for 1st stage cooling.

Page 16.3

Explanation of Jumper Settings

(continued)

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 12.4

The 2nd Stage of heat or cool is turned on when:

(A) The 1st Stage has been on for the two minutes.

And

(B) The temperature spread

than: the setpoint from the setpoint is equal to or greater plus the 1st stage deadband (step #19, page

12.5), plus two degrees.

Cooling

Deadband Deadband db 1

(adj. 1-6 ) db 2

(adj. 0-10 )

Cool

Setpoint

1st Stage turn on

TEMPERATURE INCREASE

2nd Stage turn on

16

Page 16.4

SECTION 17

Section 17 Contents:

Resetting the Thermostat to the

Factory Default Settings........17.2

Calibrating the Temperature

and Humidity Sensors...........17.3

17

Page 17.1

Factory Default Settings

(for default values see page 19.1)

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 Advanced Programming to the default settings. Any information entered prior to this reset may be permanently lost.

MODE

Place the thermostat in the

OFF mode.

OFF

72

MODE

FAN

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.

Service Filter

Pan UV Light

AUTO

OFFON

Override

FanOn

DeHumidify

I88 Setup

88

C

OOL

Outside

Remote

A

UX

H

EAT 88

17

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

Page 17.2

72

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.

MODE

Place the thermostat in the

OFF mode.

OFF

I2:00

Pm

Su

72

MODE

FAN

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.

88

Service Filter

Pan UV Light

AUTO

OFFON

Override

FanOn

DeHumidify

I88 Setup

C OOL

Outside

Remote

A UX H EAT 88

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

MODE

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, only dashes will appear.

HUMIDITY SENSOR

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

UP or DOWN buttons.

Remote

CALIBRATE 17

CALIBRATE

After calibration is complete, press the MODE button once to return to normal operation.

Page 17.3

SECTION 18

ACCESSORY PORT - The RJ11 Jack is used to connect the

P374-2700 to the IR Receiver P/N P374-0431 for wireless

communication or the EZ Programmer P/N P374-0432 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 P/N P374-0431.

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 P374-2700 thermostats. For more information see the

instruction sheet for the EZ Programmer P/N P374-0432.

18

Page 18.1

1

2

3

7

8

9

4

5

6

SECTION 19

Advanced Setup Table

Step# Pg# Description

10

11

12

13

14

15

16

Auto-Changeover

Thermostat

Fan Off Delay

Thermoglow

Backlight

F or C

Security Level

Max Heat Setpoint

Min Cool Setpoint

Cool to Dehumidify

Maximum Dehum

Overshoot

DEHUM Terminal

Polarity

Override Run-Time

Reset Service

Humidify Icon

Reset UV Light Icon

Heatpump Jumper

Setting

Reversing Valve

Jumper Setting

Electric Heat

3.2

6.3

7.2

7.2

7.4

7.4

7.4

9.4

9.4

9.5

10.2

10.3

10.5

11.2

11.2

11.3

Yes/No

0, 30, 60,

90

Auto/On/

Off

F/C

0 - 3

35 - 99

35 - 99

On/Off

0 - 5

NO/NC read only read only read only read only read only read only

Yes

0

Auto

F

0

80

55

Off

3

NC

- -

- -

- -

- -

- -

- -

17

18

19

20

21

22

23

24

25

26

27

28

29

30

Pg#

Minimum Heat/Cool

Differential

Cycles Per Hour

Deadband/Temp.

Swing 1st Stage

2nd Stage turn off at

setpoint

Thermostat control

to RS1?

Dry Contact

Operation

Dry Contact Polarity

Dry Contact

Programming

Unoccupied Cool

Unoccupied Heat

Reset Service Filter

Icon

Service Filter Run

Time Set

UV Light Run-Time

Set

Service Humidify

Run-Time Set

12.2

12.3

12.5

12.6

13.3

14.2

14.2

14.3

14.4

14.4

15.2

15.2

15.3

15.4

0 - 6 d1, d 2-6

1 - 6

On/Off

Yes/No

Yes/No

NO/NC

Override/

Service

Pan

35 - 99

35 - 99 read only

0 - 1950

0 - 1990

0 - 1990

6

2

Df*

2

On

Yes

No

NO

Ove rride

85

55

- -

0

0

0

*Df = Factory Default Setting

19

Page 19.1

SECTION 20

A

Accessory Port, 18.1

Alerts

see Run-Time

Auto

adjust temperature,

1.4, 3.5

changeover, 3.4,

19.1

differential, see

Differential

fan, 6.2

icon, 2.3

lockout, 3.2

mode, 1.2

AuxHeat icon, 2.4

B b reversing valve, 12.2

Buttons

down, 2.2, 7.3,

11.4

fan, 1.3, 2.2, 6.2,

11.4, 17.2

front panel, 2.2

humidity, 2.2, 4.3,

7.3, 8.3

mode, 1.2, 2.2, 7.3,

17.2

outside, 2.2, 4.2

Override, 2.2, 5.1

Reset Filter, 2.2, 15.2

up, 1.2, 2.2, 7.3,

11.4

C

indicator, 2.2

mode, 1.2

run-time, see Run-Time

setpoint, 1.2-1.3

to dehumidify, see

Dehumidify

Condensate Drain Pan,

2.4, 14.3

Cycles Per Hour, 12.3,

19.1

C, 7.2, 19.1

Calibration, 17.3

Celsius, 7.2

Compressor Lockout,

12.3

Cool

1st stage

deadband, see

Deadband

dehum, 9.5

2nd stage

deadband, see

Deadband

dehum, 9.5

turn off

temperature,

12.6, 19.1

Y2 operation,

16.5

deadband, see

Deadband

droop, see Deadband

electric/heat pump,

11.2

icon, 2.3

Page 20.1

D

Deadband

1st stage, 12.4-12.5,

12.6, 16.4, 19.1

2nd stage, 12.4, 12.6

Dehumidify

cool to, 9.3, 19.1

DEHUM jumper,

9.2

icon, 2.4

setpoint, 9.2

Delay

fan-off, see Fan

Differential

heat and cool, 12.2,

19.1

humidify and

dehumidify, 8.3,

9.2

Disabled Keypad

see Keypad Lockout

SECTION 20

Drain Pan Overflow

Alarm, see Dry Contact

Dry Contact

override, 14.3, 19.1

operation, 14.2,

19.1

polarity, 14.2, 19.1

random start, 14.5

service pan, 14.3

E

EH, 11.4

Electric Heating

AuxHeat icon, 2.4

jumper setting, 11.3

19.1

Emergency Heat,

11.4

EZ Programmer, 18.1

F

F, 7.2, 19.1

Factory Defaults

caution, ii

settings, 17.2

resetting, 17.2

Fahrenheit, 7.2

Fan,

button function, see

Buttons

off time delay, 6.3,

19.1

on during heat, see

Electric Heat

deadband, see

Deadband

emergency heat,

11.4

electric strip heat,

on icon, 1.3, 2.4, 6.2

2.4

run-time, 15.2

AuxHeat icon, 2.4

2nd stage heat, see

Emergency Heat

speed, see

Dehumidify

unoccupied, 6.2

Fd, 17.2

Flashing Selection,1.2

G

deadband, see

Deadband

droop, see Deadband

electric/heat pump,

11.2

icon, 2.3

indicator, 2.2

Mode, 1.2

run-time, see Run-

Time

Gas Furnace

control the fan, 11.3

jumper, 11.2

Green Indicator, 2.2

Heat

1st stage

H

setpoint, 1.2-1.3

Heat Pump

AuxHeat, 2.4

emergency heat,

11.4

jumper setting, 11.2

Humidify

icon, 2.4

service, 10.5, 15.4,

19.1

setpoint, 8.3

Humidity Module

connector, 8.2

Deadband

emergency heat,

11.4

2nd stage

Page 20.2

jumper setting, 8.2

required for, 4.3,

8.1, 8.3, 9.1-9.3,

16.4, 17.3

SECTION 20

I

IR Receiver, 18.1

IR Remote Control,

18.1

J

Jumpers

DEHUM, 16.3

ECON, 16.3

electric heat, 11.3

gas electric, 11.2

heat pump, 11.2, 19.1

HUM, 8.2, 16.2-16.3

reversing valve, 11.2,

19.1

Y2, 16.2-16.3

K

Keypad Lockout, 2.4,

7.3

L

LCD

see Display

Locked Indication

see Keypad Lockout

M

Manual

changeover, 3.3

cool, 3.2

heat, 3.2

MISC

jumper, see Jumpers

output, 16.2-16.3

Multi-stage

Operation, 12.4

N

Non-Programmable

Thermostat, 3.3-3.4

Normally

Open/Closed,

dry contact, 14.2

dehum terminal,

9.5

O

O Reversing Valve,

Page 20.3

12.2

Off Mode, 1.2, 2.3

Outdoor,

see Outside

Outside

button, see Buttons

icon, 2.3

sensor, 2.3, 4.2, 12.1-

12.2, 13.2, 17.3

viewing temperature,

2.3, 4.2, 13.2, 17.3

Override

button, see Buttons

icon, 2.3

timer, 5.1

viewing run-time,

10.2, 19.1

P

Pan, Service

see Dry Contact

Polarity, see Dry Contact

R

Random Start, 14.5

Red Indicator, 2.2

Remote Sensor

calibrate, 17.3

control to, 13.3-

SECTION 20

13.4, 17.1

degree icon blink,

13.2-13.3

icon, 2.4

outside temperature,

see Outside

read to, 13.3

wiring, 13.2

RS1, see Remote

Sensor

RS2, see Outside

Sensor

Run-Time

resetting, 15.2-15.4

setting,

humidifier, 15.4,

19.1

service filter, 15.2,

19.1

UV light, 15.3, 19.1

viewing,

Override, 10.2

UV light, 10.4

S

2nd stage turn off

temperature,

12.6, 19.1

Security

level, 7.4, 19.1

setpoints, 7.4, 19.1

Sensor

outside, see Outside

remote, see Remote

thermostat, see

Thermostat

Service

filter icon, 15.2

humidify icon, 15.4

pan icon, see Dry

Contact

UV light, 15.3

Setpoint

cool, see Cool

dehumidification,

8.4,

9.3, 9.5

heat, see Heat

humidification, 4.3,

8.4, 9.3

security, 7.4

unoccupied, 5.1

Setup Icon, 2.4

Simplest Operation,

3.2

Smart Fan, 6.2

Smart Recovery, see

Energy Save

T

Terminal, MISC, see

MISC

Thermostat Sensor

Page 20.4

calibrate, 17.3

Time Delay,

compressor lockout,

12.3

cycles per hour,

12.3, 19.1

U

Unoccupied

icon, 2.3

operation, 5.1

override, see

Override

setpoints, 14.4

UV Light

icon, 2.4

resetting, 15.3

run-time, 15.3

setting, 15.3

W

Warranty, 26.1

W3, see Jumpers

Y

Y2, see Jumpers

Section 21

Five-Year Warranty - This Product is warranted to be free from defects in material and workmanship. If it appears within five year 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 21.1

P/N 88-502 Rev. 5