Honeywell CHRONOTHERM T8600D Product data

T8600D, T8601D and T8602D

Chronotherm

®

IV Deluxe Programmable

Thermostats

PRODUCT DATA

APPLICATION

The T8600, T8601 and T8602 Chronotherm® IV Deluxe

Programmable Thermostats provide electronic control of

24 Vac single-stage heating and cooling systems.

T8600/T8601/T8602

FEATURES AND BENEFITS

• Models available with outdoor temperature sensor capability for homeowner convenience. The sensor is also more accurate than a thermometer.

• Configurable features allows one model to be used to replace many different models (less inventory, no longer need to carry separate models to get these features).

— ° F or ° C temperature display;

— Automatic or manual changeover;

— Electric or conventional heat fan operation

— Adjustable heating cycle rate.

• Minimum off time for cooling compressors and heat pumps protects the equipment and extends the equipment life.

• Easy installation, setup and system test saves installer time and increases productivity.

• Self-test simplifies troubleshooting and saves time by overriding the time delays.

• Adaptive Intelligent Recovery™ control brings the room temperature to temperature setpoint at the programmed time, maximizing comfort and energy savings.

• Setpoints are permanently held in memory (no batteries used) and retained during power outages for increased installer and homeowner convenience.

• Power stealing, hardwired and battery powered models available for virtually all equipment and application needs.

• Universal Versaguard™ Thermostat guards available for added security.

• Full seven-day program capability; different schedules and temperature setpoints may be selected for everyday to match the homeowner’s flexible schedule.

• Copy key makes programming easier and faster for the installer and homeowner.

• Daylight Savings Time (DST) key for quick change in and out of Daylight Savings Time.

• Models available with programmable fan operation for added homeowner comfort.

• Easy temporary temperature setpoint changes for current period, vacation hold (1 to 255 days) or indefinite hold adds to the homeowner comfort and energy savings.

• Frequently used keys are located by the Liquid Crystal

Display (LCD) for quick and easy access to information.

• Attractive styling complements any decor to the homeowner’s delight.

• Back lighting the large display makes the LCD very easy to read.

Contents

Application ............................................................................. 1

T8600/T8601/T8602 Features and Benefits ......................... 1

Specifications ........................................................................ 2

Ordering Information ............................................................. 2

Installation ............................................................................. 4

Wiring .................................................................................... 4

Settings ................................................................................. 6

Installer Setup ....................................................................... 7

Installer Self-Test ................................................................. 10

Thermostat Information ....................................................... 11

Programming ....................................................................... 11

Operation ............................................................................ 16

Troubleshooting Guide ........................................................ 17

Cross Reference ................................................................. 19

Wiring Diagrams (Fig. 15-20) .............................................. 24

® U.S. Registered Trademark

Copyright © 1997 Honeywell Inc. • • All Rights Reserved 68-0164-1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

SPECIFICATIONS

System Current Load Ratings:

6 VA maximum at 30 Vac, 50/60 Hz.

IMPORTANT

The specifications given in this publication do not include normal manufacturing tolerances. Therefore, this unit might not exactly match the listed specifications. This product is tested and calibrated under closely controlled conditions, and some minor differences in performance can be expected if those conditions are changed.

Output Relay Load Rating:

See Table 2.

Temperature:

Ratings:

Operating Ambient: 40 ° F to 110 ° F (4 ° C to 43 ° C).

Shipping: -30 ° F to +150 ° F (-34 ° C to +65 ° C).

Display Accuracy: ± 1 ° F ( ± 0.5

° C).

Thermostat Models

T8600, T8601 and T8602 Thermostats provide features listed in Table 1.

Setpoint:

Range:

Heating: 40 ° F to 90 ° F (4.5

° C to 32 ° C).

Cooling: 45 ° F to 99 ° F (7 ° C to 35 ° C)

Differential: 3 ° F (1.5

° C).

Default Settings: see Table 3.

Electrical Rating (Nominal Range):

24 Vac, 50/60 Hz.

20 to 30 Vac, 50/60 Hz.

Batteries:

Only T8602 models require batteries.

Minimum Stage Operation Time:

Minimum Off (Heat and Cool ): factory setting 5 minutes; option 0 to 5 minutes.

Loss of Power:

The thermostat will maintain programmed times and temperatures for the life of the product. The clock and day information is retained for a minimum of thirty minutes.

Humidity Ratings:

5% to 90% RH, noncondensing.

Clock Accuracy:

+1 minute per month.

Table 1. Thermostat Features.

System Changeover

System

Selection

T8600 (powered by either the heating or cooling system)

Fan

Selection

D Heat-Cool Automatic

T8602 (powered by batteries)

Comments

D Heat-Cool Automatic Heat-Off-Cool-Auto On-Auto System and fan selections are done by keyboard.

T8601 (powered by common wire to supply power)

Heat-Off-Cool-Auto On-Auto System and fan selections are done by keyboard.

D Heat-Cool Automatic Heat-Off-Cool-Auto On-Auto System and fan selections are done by keyboard.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the

TRADELINE® Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone:

1.

Your local Home and Building Control Sales Office (check white pages of your phone directory).

2.

Home and Building Control Customer Logistics

Honeywell Inc., 1885 Douglas Drive North

Minneapolis, Minnesota 55422-4386

In Canada—Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.

International Sales and Service Offices in all principal cities of the world. Manufacturing in Australia, Canada, Finland, France,

Germany, Japan, Mexico, Netherlands, Spain, Taiwan, United Kingdom, U.S.A.

68-0164—1 2


Relay

Fan

Heat

Cool

Table 2. Maximum Amps at 30 Vac.

Running (A)

0.5

1.5

1.5

Inrush (A)

2.5

3.5

7.5

Period

Wake

Leave

Return

Sleep

Table 3. Default Setpoints.

Time

6:00 AM

8:00 AM

6:00 PM

10:00 PM

Heat

Setpoint

70°F

(21°C)

62°F

(16.5°C)

70°F

(21°C)

62°F

(16.5°C)

Cool

Setpoint

78°F

(25.5°C)

85°F

(29.5°C)

78°F

(25.5°C)

82°F

(28°C)

Fan

Setting

Auto

Auto

Auto

Auto

Finish:

Taupe color.

Dimensions:

See Fig. 1.

Mounting Means:

The thermostat mounts on a wallplate. The wallplate mounts horizontally on a wall or outlet box with two no. 6 x 32 screws

(included).

Accessories:

C7089B Outdoor Temperature Sensors (69-1020).

Universal Versaguard™ Thermostat guards.

RECYCLING NOTICE

If this control is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.

3-5/8 (92)

2-3/4 (70)

3/8 (10)

1-13/16

(46)

3-1/2

(89)

6-1/16 (154)

1-9/16

(40)

1/2

(13)

3-3/4

(95)

Fig. 1. Dimensions of thermostat in in. (mm).

M10359

68-0164—1 3


INSTALLATION

When Installing this Product...

1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3. Installer must be a trained, experienced service technician.

4. After completing installation, use these instructions to check out the product operation.

Location

Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See

Fig. 2.

Do not install the thermostat where it can be affected by:

— drafts, or dead spots behind doors and in corners.

— hot or cold air from ducts.

— radiant heat from sun or appliances.

— concealed pipes and chimneys.

— unheated (uncooled) areas such as an outside wall behind the thermostat.

Wallplate Installation

The thermostat can be mounted horizontally on the wall or on a 2 in. x 4 in. wiring box. Position wallplate horizontally on the wall or on a 2 in. x 4 in. wiring box.

1. Position and level the wallplate (for appearance only).

The thermostat will function properly even when not level.

2. Use a pencil to mark the mounting holes. See Fig. 3.

3. Remove the wallplate from the wall and drill two 3/16 inch holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 7/32 inch holes.

Gently tap anchors (provided) into the drilled holes until flush with the wall.

4. Position the wallplate over the holes, pulling wires through the wiring opening.

5. Loosely insert the mounting screws into the holes.

6. Tighten mounting screws.

WIRING

All wiring must comply with local electrical codes and ordinances. Follow equipment manufacturer wiring instructions when available. Refer to Fig. 15 through 20 for typical hookups. A letter code is located near each terminal for identification. Refer to Table 4 for terminal designations.

CAUTION

Disconnect power before wiring to prevent electrical shock or equipment damage.

1. Loosen the terminal screws on the wallplate and connect the system wires. See Fig. 4

NO

YES

NO

5 FEET

[1.5 METERS]

NO

M10106

Fig. 2. Typical location of thermostat.

68-0164—1 4


WALL

WIRES

THROUGH WALL

WALL

ANCHORS

(2)

FOR WRAPAROUND

INSERTION STRIP

7/16 IN. (11 MM).

FOR STRAIGHT

INSERTION STRIP

5/16 IN. (8 MM).

M4826

Fig. 4. Proper wiring technique.

Fig. 3. Mounting the wallplate.

MOUNTING

HOLES

MOUNTING

SCREWS

M15044

Mounting Thermostat Wallplate

The thermostat mounts on the wallplate after they are installed.

1. Engage tabs at the top of thermostat and wallplate. See

Fig. 5.

2. Press lower edge of case to latch.

NOTE: To remove the thermostat from the wall, first pull out at the bottom of the thermostat; then remove the top.

IMPORTANT

Use 18 gauge, color-coded thermostat cable for proper wiring.

2. Securely tighten each terminal screw.

3. Push excess wire back into the hole.

4. Plug the hole with nonflammable insulation to prevent drafts from affecting the thermostat.

Table 4. Terminal Designations and Descriptions.

B

C

Standard

Terminal

Designations

G

O

OT, OT

R

—

B

F

R

—

V a

Alternate

Terminal

Designations

, C, X1, X2

Typical Connection

Heating damper or changeover valve

Common

Fan relay

Cooling damper or changeover valve

Outdoor temperature sensor (C7089B)

24V system or heating transformer

RC

W

—

H1, R3

24V cooling transformer

Heating relay

Y a

C1, M Compressor contactor

Some OEM models label the terminal for transformer common B.

Function

Output

Input

Output

Output

Input

Input

Input

Output

Output

Terminal Type

24V powered contact

24V powered contact

24V powered contact

—

—

—

24V powered contact

24V powered contact

5 68-0164—1


A.

ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.

B.

PRESS LOWER EDGE OF CASE TO LATCH.

M15043

Fig. 5. Mounting thermostat on wallplate.

SETTINGS

Using Thermostat Keys

The thermostat keys are used to:

• set current day and time,

• program times and setpoints for heating and cooling,

• temporarily override program temperatures,

• display present setting,

• configure Installer Setup,

• check System Test,

• display outdoor temperature (select models),

• set the system operation,

• set the fan operation.

See Fig. 6 for the location of the keys.

System and Fan Settings

The system default setting is Heat and the fan default setting is Auto. Use the System and Fan keys to change the settings.

See Fig. 7. The fan settings can be set for each program period individually. The system selection is for all the program periods.

SET WAKE TIMES

AND SETPOINTS

INCREASE TIME SETTING

OR SCROLL FORWARD

THROUGH INSTALLER SETUP

AND SYSTEM TEST

SET LEAVE TIMES

AND SETPOINTS

INCREASE TEMPERATURE

SETTING OR SCROLL

FORWARD THROUGH

INSTALLER SETUP OPTIONS

SET RETURN TIMES

AND SETPOINTS

SET CURRENT

DAY AND TIME

DECREASE TEMPERATURE

SETTING OR SCROLL

BACKWARD THROUGH

INSTALLER SETUP OPTIONS

DISPLAY INFORMATION

SUCH AS PRESENT

SETTINGS AND OUTDOOR

TEMPERATURE

RETURN TO

NORMAL

OPERATIONS

ENTER

INDEFINITE

OR TIMED

HOLD MODE

Run

Program

Set Current

Day/Time

Time

Wake

Set Program

Leave Return Sleep

SET SLEEP

TIMES AND

SETPOINTS

SELECT FAN

OPERATION Hold Temp Day

Heat/Cool

Settings

System Fan

SET CURRENT OR

PROGRAM DAY

CHANGE BETWEEN

DAYLIGHT SAVINGS

AND STANDARD TIME

COPY ONE PROGRAMMED

DAY TO ANOTHER DAY

Daylight

Time

Copy

CHANGE BETWEEN

HEATING AND COOLING

SETPOINTS

SELECT SYSTEM

OPERATION

DECREASE TIME SETTING

OR SCROLL BACKWARD

THROUGH INSTALLER

SETUP AND SYSTEM TEST

Fig. 6. Key locations and descriptions.

M10405A

68-0164—1 6


System settings control the thermostat operation as follows:

Heat: The thermostat controls the heating.

Off: Both the heating and cooling are off.

Cool: The thermostat controls the cooling.

Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature.

Fan settings control the system fan as follows:

On: Fan operates continuously.

Auto: Fan operates with equipment.

Time

Run

Program

Hold Temp

Set Current

Day/Time

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

M15042

System

Fan

Fig. 7. Thermostat System and Fan key locations.

The Installer Setup is used to customize the thermostat to specific systems. Some of the options include temperature display, changeover and outdoor temperature display. Installer

Setup numbers are listed in Table 6. The table includes all the configuration options and the factory-settings for the thermostat.

A combination of key presses are required to use the Installer

Setup feature.

— To enter the Installer Setup, press and hold the

Information i key with the increase ▲ and decrease ▼ keys until the first number is displayed. All display segments appear for approximately three seconds before the number is displayed. See Fig. 8 and 9.

— To advance to the next Installer Setup, press the Time ▲ key.

— To change a setting, use the increase ▲ or decrease ▼ key.

— To scroll the Installer Setup numbers backwards, press the Time ▼ key.

— To exit the Installer Setup, press Run Program.

Set Program

Hold for

Em Ht

Aux Ht

Mon

Start Time Set Day/Time Temporary Setting Enrg

Sav

AM

PM

TueWedThuFriSatSun

Wake LeaveReturnSleep In

Heat

Recovery

Cool

Auto

Room

%Humid

Outdoor

Repl Batt

System

Em Heat Off Cool Auto Wait

DST Fan

On Auto

M10345

Fig. 8. Display of all the segments of the LCD.

NOTE: Always press the keys with your fingertip or similar blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.

Temperature Settings

Refer to Table 5 for the default program. If the daytime energy savings period is not used, press the period key (Leave or

Return) until the time is blank. The fan setting feature is available on select thermostat models. See Programming

Section for complete instructions on changing the program.

Period

Wake

Leave

Return

Sleep

Table 5. Default Program Settings.

Time

6:00 AM

8:00 AM

6:00 PM

10:00 PM

Heat

Setpoint

70°F

(21°C)

62°F

(16.5°C)

70°F

(21°C)

62°F

(16.5°C)

Cool

Setpoint

78°F

(25.5°C)

85°F

(29.5°C)

78°F

(25.5°C)

82°F

(28°C)

Fan

Setting

Auto

Auto

Auto

Auto

INSTALLER SETUP

NOTE: For most applications, the thermostat factorysettings will not need to be changed. Review the factory settings in Table 6 and if no changes are necessary, go to the Installer System Test section.

INSTALLER SETUP

NUMBER DISPLAY

(COLUMN 2

OF TABLE 6)

FACTORY SETTING

OR OTHER CHOICE

DISPLAY (COLUMN 3

OR 5 OF TABLE 6)

M10404

Fig. 9. Display of Installer Setup number and setting.

CAUTION

Heat pump and electric heat systems must be configured to 1 in Installer Setup number 2 to prevent equipment damage caused by the system running without the fan.

IMPORTANT

Only configurable numbers are shown on the device.

Example: If thermostat does not have a system key,

Installer Setup Number 12 will not be displayed.

Review Table 6 factory-settings and mark any desired changes in the Actual Settings column.

When Installer Setup is complete, review the settings to confirm that they match the system.

68-0164—1 7


Table 6. Thermostat Installer Setup Options.

Select

Not used

Fan operation a 2

Installer Setup

Number (Press

Time ▲ key to change)

1 —

Display

Factory-Setting

—

Description

0 Conventional applications where equipment controls fan operation in heat mode

1

(Press

—

Display

—

Other Choices

▲ or ▼ key to change)

Description

Heat pump or electric heat applications where thermostat controls fan operation in heat mode

Not used

Heating cycle rate

3

4

—

6

Not used

System setting adjustment

Adaptive

Intelligent

Recovery™ control

Degree temperature display

Not used

Clock format

Not used

Extended fan operation in heating a

Extended fan operation in cooling

Not used

Outdoor temperature display (select models)

Not used

Deadband

5 thru 11

12

13

14

15

16

17 and 18

19

20

21 thru 23

24

25 thru 29

30

—

1

0

0

—

0

—

0

0

—

0

—

3

—

6—6 cph used for conventional heat

— —

1, 3 or 9 1—1 cph used for radiant floor heat, gravity system

3—3 cph used for hot water systems or high efficiency furnaces

9—9 cph used for electric heat systems

— —

Manual changeover 0 or 2

Adaptive Intelligent

Recovery™ control is activated (system starts early so setpoint is reached by start of program period)

Temperature is displayed in °F

1

1

—

0—Auto changeover

2—Fixed auto changeover

Conventional recovery (system starts recovery at programmed time)

Temperature is displayed in °C

—

12-hour clock format

—

—

Heating and cooling setpoints can be set no closer than 3°F

(1.5°C)

—

1

—

No extended fan operation after the call for heat ends

1

No extended fan operation after the call for cool ends

—

No outdoor temperature is displayed

1

—

—

24-hour clock format

—

Fan operation is extended 90 seconds after the call for heat ends.

Fan operation is extended 90 seconds after the call for cool ends.

—

1 Outdoor temperature is displayed. Needs a

C7089B1000 Outdoor Sensor to operate

— —

4 thru 10 Heating and cooling setpoints can be set no closer than the chosen value:

4—4°F (2°C)

5—5°F (2.5°C)

6—6°F (3°C)

7—7°F (3.5°C)

8—8°F (4°C)

9—9°F (4.5°C)

10—10°F (5°C) a Number 2 must be set to 1 to extend fan operation.

—

—

—

—

—

—

—

—

Actual

Setting

(continued)

68-0164—1 8


Table 6. Thermostat Installer Setup Options (continued).

Select

Not used

Installer Setup

Number (Press

Time ▲ key to change)

31 and 32

Minimum off time for the compressor

33

Display

—

5

Factory-Setting

—

Description

5 minute minimum off time for the compressor

(Press

Other Choices

▲ or ▼ key to change)

Display

— —

Description

0 thru 4 Minimum number of minutes (0 thru 5) the compressor will be off between calls for the compressor

40 to 89 Temperature range (1°F increments) heating setpoint can be set to

Actual

Setting

—

Temperature range stops in heating

34 90 Highest setpoint heating can be set to

Temperature range stops in cooling

Not used

35 45

—

0

Lowest setpoint cooling can be set to

46 to 99 Temperature range (1°F increments) cooling setpoint can be set to

— —

Temperature display adjustment

36

37

—

No difference in displayed temperature and actual room temperature

3 thru -3 1—Display adjusts to 1°F higher than actual room temperature

2—Display adjusts to 2°F higher than actual room temperature

3—Display adjusts to 3°F higher than actual room temperature

-1—Display adjusts to 1°F lower than actual room temperature

-2—Display adjusts to 2°F lower than actual room temperature

-3—Display adjusts to 3°F lower than actual room temperature a Number 2 must be set to 1 to extend fan operation.

—

IMPORTANT

Review the settings to confirm that they match the system. Press Run Program to exit the Installer

Setup. The thermostat has saved the Installer Setup changes and initiated a reset in order to operate with these new settings. Be sure to set the current day and time immediately.

Setting Current Day and Time

1. Press Set Current Day/Time.

NOTE: On initial power up or after an extended power loss, 1:00 pm flashes on the display until a key is pressed.

Set Current

Day/Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Copy

Sleep

Fan

Mon

Set Day/Time

PM

M10312

2. Press Day until the current day is displayed.

NOTE: Sun=Sunday, Mon=Monday, Tue=Tuesday,

Wed=Wednesday, Thu=Thursday, Fri=Friday,

Sat=Saturday.

Set Day/Time

PM

Day

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Tue

M10313

3. Press Time ▲ or Time ▼ until the current time is displayed.

NOTE: Tapping the Set Current Day/Time will change the time in one hour increments.

Time

Set Day/Time

AM

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Tue

M10314

9 68-0164—1


NOTE: If the current time is Daylight Savings Time, press Daylight Time until DST is displayed.

Daylight

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program


System Fan

Copy

Tue

Set Day/Time

AM

DST

M10315

4. Press Run Program.

Run

Program

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Tue

Wake

System

Heat

AM

Room

DST Fan

Auto

M10316

Set Program

Hold for

Em Ht

Aux Ht

Wake

System

Em Heat

Start Time

Off Cool

Set Day/Time Temporary Setting Enrg

Sav

AM

PM

Room

%Humid

Mon TueWedThuFriSatSun

LeaveReturnSleep

Auto

In

Heat

Recovery

DST

Wait

Cool

Auto

Fan

Outdoor

Repl Batt

On Auto

M10345

Fig. 10. Display of all the segments of the LCD.

INSTALLER SYSTEM TEST

Use the Installer System Test to check the thermostat operation.

Refer to Table 7 for a list of the available system tests.

To start the system test:

CAUTION

The minimum off time for compressors is bypassed during the Installer System Test. Equipment damage can occur if the compressor is cycled too quickly.

TEST NUMBER

Fig. 11. Display of test number.

M10257A

Table 7. Tests Available in Installer System Test.

Test

Number

10-19

30-39

40-49

60 0 to

60 19

70-79

System Test Description

Heating equipment can be turned on and off

Cooling equipment can be turned on and off

Fan equipment can be turned on and off

Keyboard keys test

Thermostat information including date code and software versions are displayed

Press and hold the increase ▲ and ▼ decrease keys, at the same time, until 10 appears. All segments of the display are displayed for three seconds before 10 appears. See Fig. 10 and 11.

Refer to Table 8 for the directions and results of the specific tests.

NOTE: Press Time ▲ to advance to the next test and Time

▼ to go to the previous test. Press Run Program to exit the system test.

Table 8. Installer System Test Options.

Key to Press

Test

Number Description

Heating Equipment System Test

Time ▲

▲

10

11

Enter heating equipment system test.

Heat comes on. When Installer Setup number 2 is 1, the system fan is also energized.

▼ 10 Heat and system fan turn off.

Cooling Equipment System Test

Time ▲

▲

30

31

Change from heating to cooling equipment system test.

Cool and system fan come on.

▼ 30 Cool and system fan turn off.

Fan Equipment System Test

Time ▲ 40 Change from cooling to fan equipment system test.

▲

▼

41

40

Fan comes on.

Fan turns off.

Key Operation System Test

Time ▲ 60 2 Change from fan to key operation system test.

68-0164—1 10


NOTE: Press any key and the numbers will change on the display. Press Time ▼ to scroll backwards and Time

▲ to scroll forward. The Run Program, Key will not exit from this test. To exit, go to a different test and press Run Program.

THERMOSTAT INFORMATION

1. Press the Time ▲ key to access the thermostat information.

M4934

2. Press the increase ▲ key to display the production date code. The first two large digits are the month and the third digit is the last digit of the year (Example:

027=February 1997).

M10351

3. Press the increase ▲ key again to display the software identification code. (Example: 02 = software ID code 2)

PROGRAMMING

The keyboard is located behind the thermostat cover with three frequently used keys by the display. The thermostat display shows day, time, program period, temperature, system and fan operation selection.

The thermostat can be set for four times and up to eight temperatures for each day of the week (28 independent time and 56 temperature settings). The ▲ and ▼ keys provide quick temporary temperature changes to increase comfort.

The Hold Temp key provides energy efficient operation for extended periods of time.

Before starting the programming procedure, use Table 9 to organize the program schedule. The factory preprogrammed time, temperature and fan settings are shown in brackets. If a daytime energy savings period is not used, press the period key (Leave or Return) until the time is blank. The fan setting feature is available on select thermostat models.

Setting the Current Day and Time

IMPORTANT

Always press the keys with your fingertip or similar blunt tool. Sharp instruments like pens and pencil points can damage the keyboard.

1. Press Set Current Day/Time.

NOTE: On initial power up or after an extended power loss, 1:00 pm flashes on the display until a key is pressed.

Set Day/Time

PM

Set Current

Day/Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Mon

M10312

M4932A

4. Press the increase ▲ key again to display the software revision number (Example: 001=Revision number 1).

M10229

5. Press the increase ▲ key again to display the EEPROM identification code. (Example: 314 = EEPROM ID 314)

6. Press the Run Program key to exit the system test. The

M4933A system test times out after five minutes without any key presses.

2. Press Day until the current day is displayed.

NOTE: Sun = Sunday, Mon = Monday, Tue = Tuesday,

Wed = Wednesday, Thu = Thursday, Fri =

Friday, Sat = Saturday.

Set Day/Time

PM

Day

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Tue

M10313

3. Press Time ▲ or Time ▼ until the current time is displayed.

NOTE: Tapping the Set Current Day/Time will change the time in one hour increments.

Time

Set Day/Time

AM

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Tue

M10314

11 68-0164—1


NOTE: If the current time is Daylight Savings Time, press Daylight Time until DST is displayed.

Daylight

Time

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Sleep

Fan


Tue

Set Day/Time

AM

DST

M10315

Programming the First Day

Start by programming the Wake time and temperature (and fan operation on select models) for any one day:

1. Press Wake.

Wake

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Set Program Start Time

AM

Tue

Wake

System

Heat

Heat

Setting

Fan

Auto

M10317

Run

Program

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

AM

Room

Tue

Wake

System

Heat

DST Fan

Auto

M10316

Table 9. Default Time, Setpoints and Fan Settings.

Heat Setpoint Cool Setpoint Period

Monday

Start Time

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

Tuesday

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

Wednesday

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

Thursday

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

Friday

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

Saturday

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

[Auto]

Fan Setting

[Auto]

[Auto]

[Auto]

[Auto]

(continued)

68-0164—1 12


Period

Sunday

Start Time

Wake [6:00 AM]

Leave [8:00 AM]

Return [6:00 PM]

Sleep [10:00 PM]

Table 9. Default Time, Setpoints and Fan Settings (continued).

Heat Setpoint Cool Setpoint

[70°F (21°C)]

[62°F (16.5°C)]

[70°F (21°C)]

[62°F (16.5°C)]

[78°F (25.5°C)]

[85°F (29.5°C)]

[78°F (25.5°C)]

[82°F (28°C)]

Fan Setting

[Auto]

[Auto]

[Auto]

[Auto]

2. Press Day until the desired day is displayed.

Day

Time

Run

Program

Hold Temp

Set Current

Day/Time

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Sleep

Fan


AM

Mon

Wake

System

Heat

Setting

Heat

Fan

Auto

M10318

3. Press Time ▲ or Time ▼ until the desired Wake time is displayed.

NOTE: The program times are in fifteen minute intervals. (Example: 8:00, 8:15, 8:30).

Time

Setting

Time

Run

Program

Hold Temp

Set Current

Day/Time

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan


AM

Mon

Wake

System

Heat

Heat

Fan

Auto

M10319

4. Press increase ▲ or decrease ▼ key until the desired

Wake temperature is displayed.

NOTE: The setpoint temperature range is 40 to 90 ° F

(7 to 31 ° C) for heating and 45 to 99 ° F (9 to

37 ° C) for cooling.

6. Press increase ▲ or decrease ▼ key until the desired temperature setpoint is displayed.

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan


AM

Mon

Wake

System

Heat

Setting

Cool

Fan

Auto

M10322

7. Press Leave, Return or Sleep and repeat steps 3, 4, 5 and 5 for programming the rest of the day. The first day is now programmed.

IMPORTANT

Repeat steps 1 through 7 for each day of the week that has a different program than the first day. Refer to Copying a Day section to copy any program day to another.

8. Press Run Program when all days are programmed.

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Sleep

Fan


AM

Mon

Wake

System

Heat

Setting

Heat

Fan

Auto

M10320

NOTE: Press Fan to modify fan operation. Auto means the fan will run only when the heating or cooling equipment is operating. On means the fan will run continuously for the entire period.

5. Press Heat/Cool Settings to switch to other system temperature setpoint.

NOTE: The program times are the same for both heating and cooling.

Run

Program

Time

Run

Program

Hold Temp

Set Current

Day/Time

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Tue

Wake

System

Heat

AM

Room

DST Fan

Auto

M10323

Copying a Day

NOTE: The thermostat must be in the program mode to use the copy feature. Go to step 2 if the thermostat is already in the program mode.

1. Press Wake.

Wake

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Sleep

Fan


AM

Tue

Wake

System

Heat

Setting

Heat

Fan

Auto

M10324

2. Press Day to select the day to be copied if different from the day displayed.

Heat/Cool

Settings

Time

Run

Program

Set Current

Day/Time

Hold Temp

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan


AM

Mon

Wake

System

Heat

Setting

Cool

Fan

Auto

M10321

Day

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan


AM

Mon

Wake

System

Heat

Setting

Heat

Fan

Auto

M10325

13 68-0164—1


3. Press Copy.

Copy

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Mon

M10326

4. Press Day until the day to be copied to is displayed.

Day

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Mon Wed

M10327

5. Press Copy.

NOTE: donE will be displayed for two seconds and then the normal program display will be shown.

Copy

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

M10328

6. Repeat steps 2 through 5 for all the days desired.


Clearing Program Period

NOTE: The thermostat must be in the program mode to use the clear feature. Go to step 2 if the thermostat is already in the program mode.

1. Press Wake, Leave, Return or Sleep.

Leave Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan


AM

Mon

Leave

System

Heat

Setting

Heat

Fan

Auto

M10329

2. Press Day until the desired day is displayed.

Setting

Day

Time

Run

Program

Set Current

Day/Time

Hold Temp

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan


AM

Sat

Leave

System

Heat

Heat

Fan

Auto

M10330

3. Press Leave, Return or Sleep until the start time and temperature setting are cleared (approximately 3 seconds).

NOTE: Wake cannot be cleared.

Leave

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Sleep

Fan


Leave

Sat Heat

Setting

M10331

4. Repeat steps 2 and 3 for all the periods to be cleared.


Setting Temporary Temperatures

Changing Temperature Setting Until the Next

Program Period

Press increase ▲ or decrease ▼ key until the desired temperature setpoint is displayed.

NOTE: If ▼ or ▲ appear under the temperature display, it means that both the heating and cooling setpoints are being adjusted. Tapping the key will change both the heat and cool setpoints by one degree. Press i after the desired setpoint is reached to check the setpoints.

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Wake

Temporary Setting

Heat

M10332

NOTE: The temporary temperature setting is displayed for approximately 3 seconds. The setting is canceled when the next period starts or when Run Program is pressed.

Changing Temperature Setting Indefinitely

1. Press Hold Temp.

Setting

Hold Temp

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave

Return

System

Sleep

Fan

Heat

M10333

2. Press increase ▲ or decrease ▼ key to change the setting, if desired.

Setting

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Heat

M10334

3. Press Heat/Cool Settings to change between heat and cool settings.

Setting

Heat/Cool

Settings

Run

Program

Set Current

Day/Time

Hold Temp

Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Cool

4. Press increase ▲ or decrease ▼ key to adjust temperature settings.

M10335

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Cool

Setting

M10336

68-0164—1 14


NOTE: The display changes from the setpoint to the room temperature after approximately 3 seconds.

5. Press Run Program to cancel the Hold and to return to the program.

Changing Temperature Setting Until a

Designated Day and Period

1. Press Hold Temp twice.

Setting

Hold for

Hold Temp

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program


System Fan

Copy

Wake

Heat

M10337

2. Press Time ▲ or Time ▼ until the desired number of days is displayed (1 to 255 days). (Example: 18 = Hold will override the daily programs for 18 days)

Time

Setting

Hold for

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program


System Fan

Copy

Wake

Heat

M10338

3. Press Wake, Leave, Return or Sleep to select the period the program will start. (Example: Return = thermostat will stop the Hold at the Return period start time)

Setting

Hold for

Return

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

Return

Heat

M10339

4. Press increase ▲ or decrease ▼ key to adjust the temperature setting, if desired. (Example: Heat 54 ° = heating equipment will operate when the room temperature is below 54 ° F)

Setting

Hold for

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Return

Heat

M10340

NOTE: When the System is set for Auto (select models), both heat and cool settings are needed. If the System is set for Heat, only the

Heat setpoint is needed or if Cool is selected, only the Cool setpoint is needed.

5. Press Heat/Cool Settings to change between heat and cool settings.

6. Press increase ▲ or decrease ▼ key to adjust the temperature setting, if desired. (Example: Cool 84 ° = cooling equipment will operate when the room temperature is above 84 ° F)

NOTE: In this example, the thermostat uses the Hold setting for eighteen days and returns to the daily programs at the Return period start time. The temperature settings are heating 54 ° F and cooling 84 ° F. Only the heating temperature is used because the System is set for Heat. The thermostat will use both the heating and cooling temperature settings when the System is set to Auto (select models).

IMPORTANT

If the Hold needs to be canceled before the designated time, press Run Program to return to the program.

Setting System and Fan

The system default setting is Heat and the fan default setting is Auto. Use the System and Fan keys to change the settings.

See Fig. 12. The fan settings can be set for each program period individually. The system selection is for all the program periods.

System settings control the thermostat operation as follows:

Heat: The thermostat controls the heating.

Off: Both the heating and cooling are off.

Cool: The thermostat controls the cooling.

Auto: The thermostat automatically changes between heating and cooling operation, depending on the indoor temperature.

Fan settings control the system fan as follows:

On: Fan operates continuously.

Auto: Fan operates with equipment.

Time

Run

Program

Hold Temp

Set Current

Day/Time

Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

System

Fan

M15042

Fig. 12. Thermostat System and Fan key locations.

Setting Temporary Fan Operation

If your thermostat has a Fan key and this feature, press Fan until the desired fan operation is selected. This fan setting will be in effect until the next regularly scheduled period starts.

15 68-0164—1


Using Daylight Savings Time Feature

This feature allows you to change in and out of Daylight

Savings Time with a key press. When the Daylight Time Key is pressed in the fall, the time will go back one hour. In the spring, the time will go ahead one hour and the display will show DST. See Setting the Current Day and Time section for initial setting instructions.

NOTE: Pressing the Daylight Time Key more than once within a five minute period will scroll you through various time options (Example: one hour earlier or later with or without DST). Pressing the Daylight

Time Key six times in a five minute period will return you to your original settings.

THERMOSTAT

COOL SETPOINT

PROPORTIONAL COOL

CONTROL POINT

P+I CONTROL

POINT

P+I CONTROL POINT

PROPORTIONAL HEAT

CONTROL POINT

THERMOSTAT

HEAT SETPOINT

HEATING COOLING

Daylight

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Time

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Copy

Sleep

Fan

Tue

Wake

System

Heat

AM

Room

Fan

Auto

M10341

Displaying the Outdoor Temperature

If your thermostat is equipped with an outdoor sensor, you can check the temperature at the sensor by pressing i once.

Outdoor

Time

Run

Program

Set Current

Day/Time

Hold Temp Day

Daylight

Time

Copy

Wake

Heat/Cool

Settings

Set Program

Leave Return

System

Sleep

Fan

M10342

OPERATION

P+I Control

The thermostat microprocessor based control requires that the user understands temperature control and thermostat performance. A conventional electromechanical or electronic thermostat does not control temperature precisely at setpoint.

Typically, there is an offset (droop) in the control point as the system load changes. This is a phenomenon that most people in the industry know and accept. Many factors contribute to offset including switch differential, thermal lag, overshoot, cycle rates and system load.

The thermostat microprocessor simultaneously gathers, compares and computes data. Using this data, it controls a wide variety of functions. The special proprietary algorithm

(program) in the thermostat eliminates the factors causing offset. This makes temperature control more accurate than the conventional electromechanical or electronic thermostats.

The temperature control algorithm is called proportional plus integral (P+I) control.

The thermostat sensor, located on the thermostat or remote, senses the current space temperature. The proportional error is calculated by comparing the sensed temperature to the programmed setpoint. The deviation from the setpoint is the proportional error.

The thermostat also determines integral error, which is a deviation based on the length of error time. The sum of the two errors is the (P+I) error. The cycle rate used to reach and maintain the setpoint temperature is computed using the P+I.

The addition of the integral error is what differentiates the thermostat from many other electronic and electromechanical thermostats. See Fig. 13.

68-0164—1 16

100 50 0

PERCENT LOAD

50 100

M4414

Fig 13. Proportional temperature control versus P+I temperature control.

Operation Sequence

The thermostat energizes specific terminals depending what the Fan and System are set to. The LCD will display the time, room temperature, system and fan selection. Symbols will be displayed when the heating, cooling or fan is energized. See

Table 10 for specific information.

NOTE: Not all the thermostat models have all the terminals listed in the Energize column.

Table 10. Conventional System Sequence of Operation.

Fan

Selection

System

Auto Off

On Off

Call Energize

None None

None G

Display

None

Auto Cool None O

Auto Cool or Auto Cooling O, G and Y

None

Auto Heat None B

Auto Heat or Auto Heating B and W a

and

None

Auto Auto None O or B b None a b

When electric heat fan is selected, G is energized and fan symbol is displayed.

Based on last piece of equipment called (cooling = O or heating = B) and Installer Setup selection.

Equipment Protection

As part of the operational sequence, the thermostat microprocessor also incorporates minimum off time for all cooling stages. Using the minimum off time assures that rapid cycling of equipment does not occur, which extends equipment life. Minimum off times are set in the Installer

Setup.


Thermostat Operation

Startup

When power to the thermostat is turned on, a startup and initialization program begins. The startup occurs only on initial powerup. After total loss of power for an extended period, the current time and day may need to be set, but the user program is held. See Table 11 for the default values.

NOTE: Immediately following initialization, the user can enter new setpoints to be used in place of the default values.

Table 11. Default Time, Setpoint and Fan Settings.

Period

Wake

Leave

Return

Sleep

Time

6:00 AM

8:00 AM

6:00 PM

10:00 PM

Heat

Setpoint

70°F

(21°C)

62°F

(16.5°C)

70°F

(21°C)

62°F

(16.5°C)

Cool

Setpoint

78°F

(25.5°C)

85°F

(29.5°C)

78°F

(25.5°C)

82°F

(28°C)

Fan

Setting

Auto

Auto

Auto

Auto

Adaptive Intelligent Recovery

®

Feature

Adaptive Intelligent Recovery® ensures that the comfort setting is achieved at the programmed time regardless of weather conditions. Conventional recovery, however, starts recovery at the beginning of the programmed time period and uses the equipment to achieve the comfort settings as soon as possible.

Adaptive Intelligent Recovery® calculates the recovery ramp based on the number of degrees away from the desired setpoint, previous equipment performance, and weather history to initiate recovery at the optimal time to achieve the comfort setting at the desired time.

Once the recovery ramp is intersected, the setpoint changes from the setback setpoint to the comfort setpoint. This change snaps on the equipment and runs the equipment until the setpoint is reached. If the setpoint is reached too early or too late, the ramp is adjusted for the next days' recovery.

70 ° F

60 ° F

SETPOINT

TEMPERATURE

ACTUAL

TEMPERATURE

M6185A SLEEP WAKE

HEATING MODE

Fig. 14. Temperature change in recovery.

TROUBLESHOOTING GUIDE

Refer to Table 12 for troubleshooting information.

17 68-0164—1


Table 12. Troubleshooting Information.

Symptom

Display will not come on.

Possible Cause

Thermostat is not being powered.

Action

• Check for 24 Vac between R and C or W terminals.

— If missing 24 Vac:

— check if the circuit breaker is tripped—reset the circuit breaker.

— check if the system fuse is blown—replace the fuse.

— check if the power switch on the HVAC equipment is in the

Off position—set to the On position.

— check wiring between thermostat and HVAC equipment— replace any broken wires and tighten any loose connections.

— If 24 Vac is present, proceed with troubleshooting.

Enter Installer Setup number 37 and reconfigure the display.

Temperature display is incorrect.

Room temperature display has been reconfigured.

Temperature settings will not change. (Example:

Cannot set the heating higher or the cooling lower.)

Heating will not come on.

Heating will not come on.

Thermostat is configured for °F or °C display.

Enter Installer Setup number 14 and reconfigure the display.

Bad thermostat location.

Relocate the thermostat.

The upper or lower temperature limits were reached.

Check the temperature setpoints:

• Heating limits are 40 to 90°F (4.5 to 32°C)

• Cooling limits are 45 to 99°F (7 to 35°C) except D model cooling limits are 48 to 99°F.

The setpoint temperature range stops were configured.

Check Installer Setup numbers 34 and 35 and reconfigure the setpoint stops.

No power to the thermostat.

• Setpoint is above room temperature.

• Check for 24 Vac between R and C or W terminals.








Thermostat minimum off time is activated.

Wait up to five minutes for the system to respond.

Cooling will not come on.

System selection is not set to

Heat.

Heating setpoint is below room temperature.

Set system selection to Heat.

Check heating setpoint. Set heating setpoint to desired temperature.

No power to the thermostat.

• Setpoint is below room temperature.

• Check for 24 Vac between R or RC and C or Y terminals (D models requires power to R at all times).








Thermostat minimum off time is activated.

• Wait up to five minutes for the system to respond.

• Enter Installer Setup number 33. Reconfigure minimum off time (if required).

Set system selection to Cool.

System selection is not set to

Cool.

Cool setpoint is above room temperature.

Check cooling setpoint. Set cooling setpoint to desired temperature.

(continued)

68-0164—1 18


Table 12. Troubleshooting Information (continued).

Symptom

Heating or cooling come on momentarily and shut off

Possible Cause

Heat or cool circuit is opening up or becoming high impedance.

System on indicator

(flame=heat, snowflake=cool) is displayed, but no warm or cool air is coming from the registers.

Fan operation set for 0

(conventional heat) when it should be set for 1 (electric heat).

Conventional heating equipment turns on the fan when the furnace has warmed up to a setpoint.

Action

Add resistor in parallel with load or install interface relay.

Enter Installer Setup number 2 and reconfigure the fan operation.

Wait a minute after seeing the on indicator and then check the registers.

Outdoor temperature not displayed a

Heating or cooling equipment is not operating.

Verify operation of heating or cooling equipment in self-test.

Option not activated.

Outdoor temperature display is incorrect a

Outdoor sensor is connected incorrectly.

Wrong sensor.

a Available on select models.

Enter Installer Setup number 24 and set to 1. Thermostat must have OT terminals and a C7089B1000 installed.

Refer to C7089B1000 installation instructions and check wiring between the thermostat and sensor.

Replace sensor with C7089B1000 sensor.

CROSS REFERENCE

All SUPER TRADELINE® Chronotherm® IV thermostats are different from the existing Chronotherm® III devices as summarized in Table 13.

Refer to Table 14 for thermostat cross referencing information.

Table 13. Differences Between Chronotherm® III Thermostats and Chronotherm® IV Thermostats.

Feature/Function

Programming

Changeover

Chronotherm® III Family

5-1-1 day programming

Automatic or manual changeover models available

Installer configuration Field settings made via screws on the back of the thermostat

System switching Mechanical switch

Fan switching

Device color

Mechanical switch

Beige or Premier White® color

Chronotherm® IV Family

7-day programming

Automatic/manual changeover selectable

Field settings made through the keyboard

Keyboard entry

Keyboard entry

Taupe or Premier White® color

19 68-0164—1


Model Number

T8600A

T8600A1000

T8600A1018

T8600A1034

T8600B

T8600B1008

T8600B1016

T8600C

T8600C1014

T8600C1030

T8600C1048

T8600C1055

T8600C1063

T8600C1071

T8600C1089

T8600C1097

T8600C1105

T8600C1113

T8600C1121

T8600C1147

T8600C1154

T8600C1162

Table 14. Thermostat Cross Reference Information.

Description

Canadian TRADELINE® thermostat;

Honeywell logo; degree C .

TRADELINE®

Replacement Remarks

One-stage heat conventional thermostat; system powered; system switch—none; fan switch—none.

Honeywell logo.

T8600D2028 Heat/cool model can be used for heat only; system selection Heat-Off-Cool-

Auto; duel fuel.

T8600D2028


Honeywell logo; Premier White® color; degree C .

T8600D2028

Heat/cool model can be used for heat only; system selection Heat-Off-Cool-

Auto; configure for °C in Installer Setup

14; duel fuel.

Heat/cool model can be used for heat only; system selection Heat-Off-Cool-


14; duel fuel.

One-stage heat and one-stage cool conventional thermostat; system powered

TRADELINE® thermostat; Honeywell logo; system switch—HEAT-OFF; fan switch—none.


Auto; fan selection On-Auto; duel fuel; no positive off.

TRADELINE® thermostat; Honeywell logo; system switch—none; fan switch—ON-AUTO.


Auto; duel fuel.

One-stage heat and one-stage cool thermostat; system powered; system switch—HEAT-OFF-

COOL; fan switch—ON-AUTO

T8600D2028 Separate O & B terminals; duel fuel.

TRADELINE® thermostat; Honeywell logo; conventional.


Honeywell logo; conventional; degree C;

O and B terminals.

T8600D2028 Configure for °C in Installer Setup 14; duel fuel; jumper R to Rc.

T8600D2028 Separate O & B terminals; duel fuel.

York logo; conventional; part no.

2ET07700124A.


Honeywell logo; conventional; degree C .

Trane logo; conventional; part no.

THT0594.

Trane logo; electric heat; O and B terminals; part no. THT0595.

Texfan logo; conventional.

Glowcore logo; conventional; part no.

THC-3.

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

Configure for °C in Installer Setup 14; duel fuel; jumper R to Rc.

Separate O & B terminals; duel fuel.

Configure for electric heat in Installer

Setup 2; jumper R to Rc.



York logo; conventional; part no. 025-27653 and 2ET0770224A.

Canadian York thermostat; conventional; degree C .

Arcoaire logo; conventional: part no.

1506-745.

Trane logo; conventional; part no.

TAYSTAT300.

American Standard logo; conventional; part no. ASYSTAT600.

SUPER TRADELINE® thermostat;

Honeywell logo; duel fuel fan control; O and

B terminals.

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

Separate O & B terminals.

Separate O & B terminals; configure for

°C in Installer Setup 14; duel fuel.


Separate O & B terminals; duel fuel; jumper R to Rc.


Jumper R to Rc.

(continued)

68-0164—1 20


Model Number

T8600C1170

T8600C1188

T8600C1196

T8600C1204

T8600C1212

T8600C1220

T8600C1238

T8600C1246

T8600C1253

T8600C1279

T8600D

T8600D1004

T8600D1012

T8600D1020

T8600D1038

T8600D1046

T8600D1053

T8600D1061

T8600D1079

T8600D1103

T8600D1111

T8600D1129

T8600D1137

T8600D1145

Table 14. Thermostat Cross Reference Information. (continued)

Description

Carrier thermostat; conventional; part no.

HH07AX006.

Carrier thermostat; conventional; part no.

HH641-101.


Honeywell logo; Premier White® color; conventional; degree C .

Canadian Lennox thermostat; conventional; degree C .

TRADELINE®

Replacement

T8600D2028

T8600D2028

T8600D2028

T8600D2028

Remarks




°C in Installer Setup 14; duel fuel; jumper R to Rc.


°C in Installer Setup 14; duel fuel; jumper R to Rc.

Jumper R to Rc; taupe color.



B terminals.

Servel logo; Premier White® color; conventional; Robur part no. 15471-82.

ICP logo; Premier White® color; duel fuel fan control; O and B terminals; part no.

HQ1149371HW.

T8600D2028

T8600D2028

T8600D2028

Separate O & B terminals; duel fuel; taupe color.


ICP logo; Premier White® color; duel fuel fan control; O and B terminals; part no.

HQ1149372HW.

Consolidated Industries logo; Premier

White® color; conventional; part no.

412360.

Trane.

Heil Quaker thermostat; Honeywell logo; part no. HQ1000776HW.

Carrier.

Lennox logo; part no. 27H3101.

Carrier.

TRADELINE® thermostat; Honeywell logo;

Premier White® color.


Honeywell logo; Premier White® color; degree C.

Solitaire logo; Premier White® color;

Nordyne part no. 9132400.

Canadian Carrier thermostat; Premier

White® color; degree C ; part no.

HH07AT101-W.

T8600D2028

T8600D2028



Canadian TRADELINE® (French) thermostat; conventional.

T8600D2028 English only keyboard; separate O & B terminals; duel fuel.

One-stage heat and one-stage cool conventional thermostat; system powered; automatic changeover; system switch— HEAT-OFF-COOL-AUTO; fan switch— ON-AUTO

TRADELINE®

Energy Sensor.

thermostat; Honeywell logo.



Canadian Carrier thermostat; degree C ; part no. HH07AT101.

T8600D2028

T8600D2028

T8600D2028

T8600D2028






°C in Installer Setup 14; duel fuel;

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028

T8600D2028












(continued)

21 68-0164—1


Model Number

T8601A

T8601A1017

T8601B

T8601B1007

T8601C

T8601C1003

T8601C1013

T8601C1021

T8601C1039

T8601C1047

T8601C1054

T8601C1062

T8601D

T8601D1011

T8601D1029

T8601D1045

T8601D1052

T8601D1060

T8601D1078


Description

Amana logo; Premier White® color; part no. P1213701F.

TRADELINE®


One-stage conventional heat thermostat; powered direct from 24 Vac transformer


Honeywell logo; system switch—none; fan switch—none; degree C .



14; Premier White® color.

One-stage conventional heat with fan thermostat; powered direct from 24 Vac transformer

TRADELINE® thermostat; Honeywell logo; system switch—none; fan switch—ON-AUTO .


Auto; jumper R to Rc for fan control;


One-stage heat and one-stage cool conventional thermostat; powered direct from 24 Vac transformer; system switch—HEAT-OFF-COOL; fan switch—ON-AUTO; O and B terminals

TRADELINE® thermostat; Honeywell logo.



New Construction thermostat.

Carrier logo; part no. HH641-104.

T8601D2019

T8601D2019

T8601D2019

T8601D2019

Jumper R to Rc; Premier White® color.

Configure for °C in Installer Setup 14; jumper R to Rc; Premier White® color.



New Construction thermostat; Premier

White® color.

Trol-A-Temp® thermostat; Premier White® color.

T8601D2019

T8601D2027 a

Jumper R to Rc.

Configure manual changeover in

Installer Setup12; replacement has Oc terminals.

Trol-A-Temp® by Honeywell logo.

T8601D2027 a

Configure manual changeover in

Installer Setup12; replacement has Oc terminals; Premier White® color.

One-stage heat and one-stage cool conventional thermostat; powered direct from 24 Vac transformer; automatic changeover; system switch—HEAT-OFF-COOL-AUTO; fan switch—ON-

AUTO



New Construction thermostat.

Trol-A-Temp® by Honeywell thermostat;


New Construction thermostat; Premier

White® color.

T8601D2019

T8601D2019

T8601D2027

T8601D2019 a


°C in Installer Setup 14 and changeover in 12; jumper R to Rc;


Separate O & B terminals; configure changeover in Installer Setup 12; jumper R to Rc; Premier White® color.

Separate O & B terminals; replacement has Oc terminals.

California Economizer logo; Premier

White® color.

T8601D2019

Separate O & B terminals; configure changeover in Installer Setup 12; jumper R to Rc.

Separate O & B terminals; configure changeover in Installer Setup 12; jumper R to Rc.

T8601D2019 Separate O & B terminals; configure changeover in Installer Setup 12; jumper R to Rc.

(continued)

68-0164—1 22


Model Number

T8602A

T8602A1008

T8602B

T8602B1006

T8602B1014

T8602C

T8602C1004

T8602C1012

T8602C1020

T8602C1046

T8602C1061

T8602C1079

T8602C1095

T8602C1103

T8602C1129

T8602C1137

T8602C1145


Description

TRADELINE®


One-stage heat conventional thermostat; battery powered; system switch—none; fan switch— none


T8602D2000 Heat/cool model can be used for heat only; separate O & B terminals; system selection Heat-Off-Cool-Auto; fan selection Auto-On.

One-stage heat conventional with fan thermostat; battery powered; system switch—none; fan switch—ON-AUTO


T8602D2000 Heat/cool model can be used for heat only; separate O & B terminals; system selection Heat-Off-Cool-Auto; fan selection Auto-On; jumper R to Rc for fan operation.

TRADELINE® thermostat; Honeywell logo;


T8602D2000 Heat/cool model can be used for heat only; separate O & B terminals; system selection Heat-Off-Cool-Auto; fan selection Auto-On; jumper R to Rc for fan operation; taupe color.

One-stage heat and one-stage cool thermostat; battery powered; system switch—HEAT-OFF-

COOL; fan switch—ON-AUTO


T8602D2000

Amana logo; conventional; part no.: none.

Rheem logo; conventional; part no.: none.

T8602D2000

T8602D2000

Separate O & B terminals; jumper R to

Rc.


Rc.


Rc.



B terminals.


Premier White® color; conventional; O and

B terminals.

Trol-A-Temp® by Honeywell thermostat; conventional; O and B terminals.

T8602D2000

T8602C2051

T8602C2051 a a


T8602D2000 Taupe color.


Honeywell logo; Premier White® color; duel fuel fan control; O and B terminals.


Honeywell logo; duel fuel fan control; degree C ; O and B terminals.

Universal Parts logo; Rheem part no.

41-21615-05; conventional.

ICP logo; duel fuel fan control; O and B terminals; part no. HQ1149373HW.

ICP logo; Premier White® color; duel fuel fan control; O and B terminals; part no. HQ1149374HW.

T8602D2000

T8602D2000

T8602D2000

T8602D2000

Configure for °C in Installer Setup 14 .

Taupe color.

23

(continued)

68-0164—1



Model Number

T8602D

T8602D1010

T8602D1028

Description

TRADELINE®


One-stage heat and one-stage cool conventional thermostat; battery powered; automatic changeover

T8602D2026 a


Premier White® color; system switch—none; fan switch—none; field terminals: W/4, R/5, Y/6.

Trol-A-Temp® by Honeywell thermostat; system switch—none; fan switch—none; field terminals: W/4, R/5, Y/6.

T8602D2026 a


One-stage heat and one-stage cool retail thermostat battery powered CT8602C

CT8602C1001 a

Retail Honeywell logo; off-white color; duel fuel fan control; system switch HEAT-OFF-

COOL; fan switch ON-AUTO; separate O and B terminals; clamshell packaging.

Trol-A-Temp® by Honeywell thermostat model.

T8602D2000 TRADELINE® packaging.

WIRING DIAGRAMS (Fig. 15-20)

THERMOSTAT

2

G W R

HEAT

RELAY

FAN

RELAY

1

L1

(HOT)

L2

TRANSFORMER

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

2 NOT AVAILABLE ON T8600A MODELS.

M10346

Fig. 15. Typical hookup of T8600 or T8602 in heat only application.

Y

COMPRESSOR

CONTACTOR

G

COOL

O

THERMOSTAT

B W

3

DAMPER

2

HEAT

RELAY

R OT

3

OT

OUTDOOR

TEMPERATURE

SENSOR

FAN

RELAY

HEAT

DAMPER

2

1

L1

(HOT)

L2

TRANSFORMER

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD

PROTECTION AS REQUIRED.

2 CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT

PUMP SYSTEMS.

3

AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A

SEPARATE CABLE FROM THE THERMOSTAT CABLE.

M10347

Fig. 16. Typical hookup of T8600 or T8602 in heat and cool system with one transformer.

68-0164—1 24


RC

2

Y G

THERMOSTAT

O B

4

W R

5

OT

4

OT

COMPRESSOR

CONTACTOR

COOL

DAMPER

3

HEAT

RELAY

OUTDOOR

TEMPERATURE

SENSOR

FAN

RELAY HEAT

DAMPER

3

L1

(HOT)

L2

1

1

L1

(HOT)

L2

HEATING

TRANSFORMER

COOLING

TRANSFORMER



2 JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A

ONE TRANSFORMER SYSTEM.


PUMP SYSTEMS.

4 AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A


5 T8600D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES.

M10348

Fig. 17. Typical hookup of T8600 or T8602 in heat and cool system with two transformers.

C

2

THERMOSTAT

G W R

HEAT

RELAY

FAN

RELAY

1

L1

(HOT)

L2

TRANSFORMER

1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

2 NOT AVAILABLE ON "A" MODELS.

M10357

Fig. 18. Typical hookup of T8601 in heat only application.

C Y

COMPRESSOR

CONTACTOR

G

COOL

O

THERMOSTAT

B W

3

DAMPER

2

HEAT

RELAY

R OT

3

OT

OUTDOOR

TEMPERATURE

SENSOR

FAN

RELAY

HEAT

DAMPER

2

1

L1

(HOT)

L2

TRANSFORMER




PUMP SYSTEMS.



Fig. 19. Typical hookup of T8601 in heat and cool system with one transformer.

M10353

THERMOSTAT

O 4 C B RC

2

Y G W R 5 OT

4

OT

COMPRESSOR

CONTACTOR

COOL

DAMPER

3

FAN

RELAY

HEAT

RELAY

OUTDOOR

TEMPERATURE

SENSOR

HEAT

DAMPER

3

L1

(HOT)

L2

1

1

L1

(HOT)

L2

HEATING

TRANSFORMER

COOLING

TRANSFORMER



2 JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A

ONE TRANSFORMER SYSTEM.


PUMP SYSTEMS.



5 T8601D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES.

M10354

Fig. 20. Typical hookup of T8601 in heat and cool system with two transformers.

25 68-0164—1


68-0164—1 26


27 68-0164—1


Home and Building Control

Honeywell Inc.

Honeywell Plaza

P.O. Box 524

Minneapolis MN 55408-0524

Honeywell Latin American Region

480 Sawgrass Corporate Parkway

Suite 200

Sunrise FL 33325

Home and Building Control

Honeywell Limited-Honeywell Limitée

155 Gordon Baker Road

North York, Ontario

M2H 3N7

Honeywell Europe S.A.

3 Avenue du Bourget

B-1140 Brussels Belgium

Honeywell Asia Pacific Inc.

Room 3213-3225

Sun Hung Kai Centre

No. 30 Harbour Road

Wanchai

Hong Kong

Printed on recycled paper containing at

28

Helping You Control Your World ® www.honeywell.com/yourhome

Honeywell CHRONOTHERM T8600D Product data

T8600D, T8601D and T8602D

Chronotherm

®

IV Deluxe Programmable

Thermostats

PRODUCT DATA

APPLICATION

T8600/T8601/T8602

FEATURES AND BENEFITS

Contents

SPECIFICATIONS

Thermostat Models

ORDERING INFORMATION

RECYCLING NOTICE

INSTALLATION

When Installing this Product...

Location

Wallplate Installation

WIRING

CAUTION

Mounting Thermostat Wallplate

SETTINGS

Using Thermostat Keys

System and Fan Settings

Temperature Settings

INSTALLER SETUP

CAUTION

Setting Current Day and Time

INSTALLER SYSTEM TEST

CAUTION

THERMOSTAT INFORMATION

PROGRAMMING

Setting the Current Day and Time

Programming the First Day

Copying a Day

Clearing Program Period

Setting Temporary Temperatures

Changing Temperature Setting Until the Next

Program Period

Changing Temperature Setting Indefinitely

Changing Temperature Setting Until a

Designated Day and Period

Setting System and Fan

Setting Temporary Fan Operation

Using Daylight Savings Time Feature

Displaying the Outdoor Temperature

OPERATION

P+I Control

Operation Sequence

Equipment Protection

Thermostat Operation

Startup

Adaptive Intelligent Recovery

Feature

TROUBLESHOOTING GUIDE

CROSS REFERENCE

WIRING DIAGRAMS (Fig. 15-20)

Key Features

Related manuals

MAAX

136270-900-305-000

Honeywell

Deluxe

Braemar

Controller Honeywell Deluxe

Honeywell

T8600D

Honeywell

T8602D

Honeywell

CHRONOTHERM T8602C

ClimateMaster

ATA21H01

Frequently Answers and Questions

What is the temperature range of the thermostat?

What is the minimum off time for cooling compressors and heat pumps?

Does the thermostat require batteries?

Table of contents