Honeywell T8600D, T8602D, T8601D User Manual

T8600D, T8601D and T8602D

68-0164-1

Chronotherm

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

• 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.

IV Deluxe Programmable

Thermostats

PRODUCT DATA

• 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.

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

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

SPECIFICATIONS

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.

Thermostat Models

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

Electrical Rating (Nominal Range):

24 Vac, 50/60 Hz. 20 to 30 Vac, 50/60 Hz.

Batteries:

Only T8602 models require batteries.

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.

Table 1. Thermostat Features.

System Current Load Ratings:

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

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).

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.

Minimum Stage Operation Time:

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

Humidity Ratings:

5% to 90% RH, noncondensing.

Clock Accuracy:

+1 minute per month.

System

System Changeover

T8600 (powered by either the heating or cooling system)

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)

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

T8602 (powered by batteries)

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

Selection

Fan

Selection Comments

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

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 2. Maximum Amps at 30 Vac.

Relay Running (A) Inrush (A)

Fan 0.5 2.5 Heat 1.5 3.5 Cool 1.5 7.5

Table 3. Default Setpoints.

Period Time

Setpoint

Wake 6:00 AM 70°F

(21°C)

Leave 8:00 AM 62°F

(16.5°C)

Return 6:00 PM 70°F

(21°C)

Sleep 10:00 PM 62°F

(16.5°C)

Heat

Cool

Setpoint

78°F

(25.5°C)

85°F

(29.5°C)

78°F

(25.5°C)

82°F

(28°C)

Fan

Setting

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)

6-1/16 (154)

3-3/4

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

3-1/2

(89)

(95)

1-9/16

(40)

1/2 (13)

M10359

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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

68-0164—1

YES

5 FEET

[1.5 METERS]

Fig. 2. Typical location of thermostat.

M10106

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

WALL

WIRES THROUGH WALL

WALL ANCHORS (2)

FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM).

IMPORTANT

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

Fig. 3. Mounting the wallplate.

MOUNTING HOLES

MOUNTING SCREWS

M15044

FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM).

Fig. 4. Proper wiring technique.

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.

M4826

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.

Standard

Terminal

Designations

Alternate

Terminal

Designations Typical Connection Function Terminal Type

B— Heating damper or changeover valve Output 24V powered contact CB

, C, X1, X2 Common Input GF Fan relay Output 24V powered contact OR Cooling damper or changeover valve Output 24V powered contact OT, OT — Outdoor temperature sensor (C7089B) Input — RV 24V system or heating transformer Input — RC — 24V cooling transformer Input — W H1, R3 Heating relay Output 24V powered contact Y C1, M Compressor contactor Output 24V powered contact

Some OEM models label the terminal for transformer common B.

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

ENGAGE TABS AT TOP OF THERMOSTAT AND 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,

PRESS LOWER EDGE OF CASE TO LATCH.

• 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

M15043

Fig. 5. Mounting thermostat on wallplate.

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 CURRENT DAY AND TIME

RETURN TO NORMAL OPERATIONS

ENTER INDEFINITE OR TIMED HOLD MODE

SET CURRENT OR PROGRAM DAY

CHANGE BETWEEN DAYLIGHT SAVINGS AND STANDARD TIME

COPY ONE PROGRAMMED DAY TO ANOTHER DAY

Run

Program

Hold Temp

Set Current

Day/Time

Day

Daylight

Time

SET LEAVE TIMES AND SETPOINTS

SET RETURN TIMES AND SETPOINTS

Time Set Program

Wake

Heat/Cool

Settings

Copy

Leave

DECREASE TIME SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP AND SYSTEM TEST

Return Sleep

System Fan

CHANGE BETWEEN HEATING AND COOLING SETPOINTS

INCREASE TEMPERATURE SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP OPTIONS

DECREASE TEMPERATURE SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP OPTIONS

DISPLAY INFORMATION SUCH AS PRESENT SETTINGS AND OUTDOOR TEMPERATURE

SET SLEEP TIMES AND SETPOINTS

SELECT FAN OPERATION

SELECT SYSTEM OPERATION

M10405A

68-0164—1

Fig. 6. Key locations and descriptions.

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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.

Run

Program

Hold Temp

Time Set Program

Set Current

Day/Time

Day

Daylight

Copy

Time

Heat/Cool

Settings

Leave

Wake

Return

System Fan

Sleep

M15042

System

Fan

Fig. 7. Thermostat System and Fan key locations.

NOTE: Always press the keys with your fingertip or similar

blunt tool. Sharp instruments like a pen or pencil point can damage the keyboard.

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

Start Time

Aux Ht

Mon

TueWedThuFriSatSun

Wake

LeaveReturnSleep

Set Day/Time

AM PM

System Fan

Off Auto

Heat

Cool

Temporary Setting Enrg

Heat

Recovery

DST

Wait

Cool

Auto

Sav

Room

%Humid

Outdoor

Repl Batt

Auto

M10345

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

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.

Table 5. Default Program Settings.

Heat

Period Time

Setpoint

Wake 6:00 AM 70°F

(21°C)

Leave 8:00 AM 62°F

(16.5°C)

Return 6:00 PM 70°F

(21°C)

Sleep 10:00 PM 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

INSTALLER SETUP

NOTE: For most applications, the thermostat factory-

settings 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)

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.

M10404

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 6. Thermostat Installer Setup Options.

Installer Setup

Other Choices

Select

Number (Press

Time ▲ key to

change)

Factory-Setting

(Press ▲ or ▼ key to change)

Display Description Display Description

Not used 1 — — — — — Fan operation

20Conventional

applications where equipment controls fan operation in heat mode

1 Heat pump or electric heat

applications where thermostat controls fan operation in heat mode

Not used 3 — — — — — Heating cycle

rate

466—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 Not used 5 thru 11 — — — — — System setting

adjustment Adaptive

Intelligent Recovery™ control

12 1 Manual changeover 0 or 2 0—Auto changeover

2—Fixed auto changeover

13 0 Adaptive Intelligent

Recovery™ control is activated (system

1 Conventional recovery (system

starts recovery at programmed time)

starts early so setpoint

—

is reached by start of program period)

Degree temperature

14 0 Temperature is

displayed in °F

1 Temperature is displayed in °C

display Not used 15 — — — — — Clock format 16 0 12-hour clock format 1 24-hour clock format Not used 17 and 18 — — — — — Extended fan

operation in heating

Extended fan operation in cooling

19 0 No extended fan

operation after the call for heat ends

20 0 No extended fan

operation after the call for cool ends

1 Fan operation is extended 90

seconds after the call for heat ends.

1 Fan operation is extended 90

seconds after the call for cool

ends. Not used 21 thru 23 — — — — — Outdoor

temperature display (select models)

24 0 No outdoor

temperature is displayed

1 Outdoor temperature is

displayed. Needs a

C7089B1000 Outdoor Sensor

to operate Not used 25 thru 29 — — — — — Deadband 30 3 Heating and cooling

setpoints can be set no closer than 3°F (1.5°C)

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)

Number 2 must be set to 1 to extend fan operation.

(continued)

Actual

Setting

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 6. Thermostat Installer Setup Options (continued).

Select

Installer Setup

Number (Press

Time ▲ key to

change)

Factory-Setting

(Press ▲ or ▼ key to change)

Display Description Display Description

Other Choices

Not used 31 and 32 — — — — — Minimum off time

for the compressor

33 5 5 minute minimum off

time for the compressor

0 thru 4 Minimum number of minutes (0

thru 5) the compressor will be off between calls for the compressor

Temperature range stops in heating

Temperature range stops in cooling

34 90 Highest setpoint

heating can be set to

35 45 Lowest setpoint

cooling can be set to

40 to 89 Temperature range (1°F

increments) heating setpoint can be set to

46 to 99 Temperature range (1°F

increments) cooling setpoint

can be set to Not used 36 — — — — — Temperature

display adjustment

37 0 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

Number 2 must be set to 1 to extend fan operation.

Actual

Setting

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

Set Current

Day/Time

loss, 1:00 pm flashes on the display until a key is pressed.

Set Day/Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Leave

Wake

Return Sleep

System Fan

Mon

Heat/Cool

Day

Settings

Daylight

Copy

Time

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

Day

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Leave

Wake

Return Sleep

Heat/Cool

Day

Daylight

Time

System Fan

Settings

Copy

Tue

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

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Daylight

Leave

Wake

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Time

Set Day/Time

Tue

M10313

M10314

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

NOTE: If the current time is Daylight Savings Time,

press Daylight Time until DST is displayed.

Set Day/Time

DST

M10315

Daylight

Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Leave

Wake

Return Sleep

Heat/Cool

Day

Daylight

Time

System Fan

Settings

Copy

Tue

4. Press Run Program.

Run

Program

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Tue

Wake

System Fan

Heat

Room

DST

Auto

M10316

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.

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.

Set Program

Hold for

Em Ht

Start Time

Aux Ht

Mon

TueWedThuFriSatSun

LeaveReturnSleep

Wake

Set Day/Time

System Fan

Off Auto

Heat

Cool

Temporary Setting Enrg

Heat

Recovery

DST

Wait

Cool

Auto

Sav

Room

%Humid

Outdoor

Repl Batt

Auto

M10345

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

TEST NUMBER

M10257A

Fig. 11. Display of test number.

Table 7. Tests Available in Installer System Test.

Test

Number System Test Description

10-19 Heating equipment can be turned on and off 30-39 Cooling equipment can be turned on and off 40-49 Fan equipment can be turned on and off

60 0 to

Keyboard keys test

60 19

70-79 Thermostat information including date code and

software versions are displayed

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.

Test

Key to Press

Number Description Heating Equipment System Test Time ▲ 10 Enter heating equipment system test.

▲ 11 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 Change from heating to cooling equipment system test.

▲ 31 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 Fan comes on. ▼ 40 Fan turns off.

Key Operation System Test Time ▲ 60 2 Change from fan to key operation system test.

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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).

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.

M10351

3. Press the increase ▲ key again to display the software

identification code. (Example: 02 = software ID code 2)

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

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

Set Current

Day/Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Leave

Wake

Return Sleep

System Fan

Mon

Heat/Cool Settings

Daylight

Copy

Time

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

Day

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Leave

Wake

Return Sleep

Heat/Cool

System Fan

Settings

Daylight

Copy

Time

Tue

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.

M10312

M10313

M4933A

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

Time

Set Day/Time

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Tue

M10314

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

NOTE: If the current time is Daylight Savings Time,

press Daylight Time until DST is displayed.

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.

Run

Program

Wake

Hold Temp

Set Current Day/Time

Day

Daylight

Time

Time Set Program

Leave

Wake

Heat/Cool Settings

Copy

Return Sleep

System Fan

Set Program

Start Time

Tue

Wake

System Fan

Heat

Setting

Auto

M10317

Daylight

Time

Run

Day/Time

Program

Hold Temp

Day

Daylight

Leave

Wake

Heat/Cool Settings

Copy

Time

Time Set Program

Set Current

4. Press Run Program.

Time Set Program

Set Current

Run

Wake

Day/Time

Run

Program

Heat/Cool

Hold Temp

Day

Settings

Daylight

Copy

Time

Set Day/Time

Return Sleep

System Fan

Tue

DST

M10315

Leave

Return Sleep

System Fan

Tue

Wake

System Fan

Heat

Room

DST

Auto

M10316

Table 9. Default Time, Setpoints and Fan Settings.

Period Start Time Heat Setpoint Cool Setpoint Fan Setting Monday

Wake [6:00 AM] [70°F (21°C)] [78°F (25.5°C)] [Auto] Leave [8:00 AM] [62°F (16.5°C)] [85°F (29.5°C)] [Auto] Return [6:00 PM] [70°F (21°C)] [78°F (25.5°C)] [Auto] Sleep [10:00 PM] [62°F (16.5°C)] [82°F (28°C)] [Auto]

Tuesday

Wednesday

Thursday

Friday

Saturday

68-0164—1

(continued)

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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

Period Start Time Heat Setpoint Cool Setpoint Fan Setting Sunday

2. Press Day until the desired day is displayed.

Setting

Heat

Auto

M10318

Day

Set Program

Start Time

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon Wake

System Fan

Heat

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

Set Program

Start Time

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon Wake

System Fan

Heat

Setting

Heat

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.

Set Program

Start Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Leave

Wake

Return Sleep

Mon

System Fan

Wake

System Fan

Heat

Heat/Cool

Day

Settings

Daylight

Copy

Time

Setting

Heat

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.

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

temperature setpoint is displayed.

Set Program

Start Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Leave

Wake

Return Sleep

Mon

System Fan

Wake

System Fan

Heat

Heat/Cool

Settings

Daylight

Copy

Time

Setting

Cool

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

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.

Run

Program

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Tue

Wake

System Fan

Heat

Room

DST

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.

Set Program

Start Time

Wake

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Leave

Wake

Return Sleep

Heat/Cool

System Fan

Settings

Daylight

Copy

Time

Tue

Wake

System Fan

Heat

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

from the day displayed.

Setting

Heat

Auto

M10324

Heat/Cool

Settings

Set Program

Start Time

Set Program

Start Time

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon Wake

System Fan

Heat

Setting

Cool

Auto

Day

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon Wake

System Fan

Heat

M10321

Setting

Heat

Auto

M10325

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

3. Press Copy.

Copy

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon

M10326

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

Day

Run

Day/Time

Program

Hold Temp

Leave

Wake

Return Sleep

Mon

Heat/Cool

Day

Daylight

Time

System Fan

Settings

Copy

Wed

M10327

Time Set Program

Set Current

5. Press Copy.

NOTE: donE will be displayed for two seconds and

then the normal program display will be shown.

Copy

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

Heat/Cool

System Fan

Settings

Copy

M10328

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

7. Press Run Program.

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

5. Press Run Program.

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

NOTE: The temporary temperature setting is displayed for

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.

Temporary Setting

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

System Fan

Wake

Heat/Cool Settings

Copy

Heat

M10332

approximately 3 seconds. The setting is canceled when the next period starts or when Run Program is pressed.

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.

Setting

Heat

Auto

M10329

Leave

Set Program

Start Time

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon

Leave

System Fan

Heat

2. Press Day until the desired day is displayed.

Setting

Heat

Auto

M10330

Day

Set Program

Start Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Leave

Wake

Return Sleep

Heat/Cool

Day

Daylight

Time

System Fan

Settings

Copy

Leave

System Fan

Heat

Sat

3. Press Leave, Return or Sleep until the start time and

temperature setting are cleared (approximately 3 seconds).

NOTE: Wake cannot be cleared.

Setting

Heat

M10331

Leave

Set Program

Start Time

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Leave

Sat

Changing Temperature Setting Indefinitely

1. Press Hold Temp.

Setting

Time Set Program

Set Current

Run

Hold Temp

Program

Hold Temp

2. Press increase ▲ or decrease ▼ key to change the

setting, if desired.

Set Current

Run

Day/Time

Program

Hold Temp

Day

Daylight

Time

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

cool settings.

Run

Heat/Cool

Settings

Program

Hold Temp

4. Press increase ▲ or decrease ▼ key to adjust

temperature settings.

Set Current

Run

Day/Time

Program

Hold Temp

Day

Daylight

Time

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

Time Set Program

Wake

Heat/Cool Settings

Copy

Time Set Program

Set Current Day/Time

Day

Daylight

Copy

Time

Time Set Program

Leave

Wake

Heat/Cool Settings

Copy

Leave

Wake

Return Sleep

System Fan

Heat

M10333

Setting

Leave

Return Sleep

System Fan

Heat

M10334

Setting

Leave

Wake

Return Sleep

Heat/Cool

System Fan

Settings

Cool

M10335

Setting

Return Sleep

System Fan

Cool

M10336

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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

Heat

M10337

Setting

Heat

M10338

Hold Temp

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

Return Sleep

System Fan

Hold for

Wake

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

Return Sleep

System Fan

Hold for

Wake

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Leave

Wake

Heat/Cool

Settings

Daylight

Copy

Time

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)

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.

Setting

Heat

M10339

Return

System Fan

Hold for

Sleep

Return

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

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

Heat

M10340

Return Sleep

System Fan

Hold for

Return

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

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)

Program

Hold Temp

Run

Time Set Program

Set Current Day/Time

Day

Daylight

Copy

Time

Heat/Cool

Settings

Leave

Wake

Return

System Fan

Sleep

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.

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

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.

Daylight

Time

Time Set Program

Set Current

Run

Day/Time

Program

Hold Temp

Day

Daylight

Leave

Wake

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Time

Tue

Wake

System Fan

Heat

Room

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.

Time Set Program

Set Current

Run

Program

Hold Temp

Leave

Wake

Day/Time

Day

Daylight

Time

Return Sleep

Heat/Cool

System Fan

Settings

Copy

Outdoor

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.

THERMOSTAT COOL SETPOINT

PROPORTIONAL COOL CONTROL POINT

P+I CONTROL POINT

TEMPERATURE

100 50 0 50 100

PROPORTIONAL HEAT CONTROL POINT

THERMOSTAT HEAT SETPOINT

HEATING

PERCENT LOAD

COOLING

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 Ta ble 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.

Selection

Fan System Call Energize Display

Auto Off None None None On Off None G

Auto Cool None O None

Auto Cool or Auto Cooling O, G and Y

and

Auto Heat None B None

Auto Heat or Auto Heating B and W

Auto Auto None O or B

When electric heat fan is selected, G is energized and fan

None

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.

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

70°F

60°F

SLEEP

HEATING MODE

WAKE

SETPOINT TEMPERATURE

ACTUAL TEMPERATURE

M6185A

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 Time

Setpoint

Wake 6:00 AM 70°F

(21°C)

Leave 8:00 AM 62°F

(16.5°C)

Return 6:00 PM 70°F

(21°C)

Sleep 10:00 PM 62°F

(16.5°C)

Adaptive Intelligent Recovery

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.

Heat

Cool

Setpoint

78°F

(25.5°C)

85°F

(29.5°C)

78°F

(25.5°C)

82°F

(28°C)

Feature

Fan

Setting

Auto

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.

Fig. 14. Temperature change in recovery.

TROUBLESHOOTING GUIDE

Refer to Table 12 for troubleshooting information.

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 12. Troubleshooting Information.

Symptom Possible Cause Action

Display will not come on.

Temperature display is incorrect.

Temperature settings will not change. (Example: Cannot set the

heating higher or the cooling lower.)

Heating will not come on.

Cooling will not come on.

Thermostat is not being powered.

Room temperature display has been reconfigured.

Thermostat is configured for °F or °C display.

Bad thermostat location. The upper or lower temperature

limits were reached.

The setpoint temperature range stops were configured.

No power to the thermostat.

Thermostat minimum off time is activated.

System selection is not set to Heat.

Heating setpoint is below room temperature.

No power to the thermostat.

Thermostat minimum off time is activated.

System selection is not set to Cool.

Cool setpoint is above room temperature.

• 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.

Enter Installer Setup number 14 and reconfigure the display.

Relocate the thermostat. 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.

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

• Setpoint is above room temperature.

• 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.

Wait up to five minutes for the system to respond.

Set system selection to Heat.

Check heating setpoint. Set heating setpoint to desired temperature.

• 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). — 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.

• 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.

Check cooling setpoint. Set cooling setpoint to desired temperature.

68-0164—1

(continued)

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 12. Troubleshooting Information (continued).

Symptom Possible Cause Action

Heating or cooling come on momentarily and shut off

System on indicator (flame=heat, snowflake=cool) is displayed, but no

warm or cool air is coming from the registers.

Outdoor temperature not displayed

Outdoor temperature display is incorrect

Available on select models.

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

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.

Heating or cooling equipment is not operating.

Option not activated. Enter Installer Setup number 24 and set to 1. Thermostat must have OT

Outdoor sensor is connected incorrectly.

Wrong sensor. Replace sensor with C7089B1000 sensor.

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.

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

terminals and a C7089B1000 installed.

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

CROSS REFERENCE

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

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

Feature/Function Chronotherm® III Family Chronotherm® IV Family

Programming 5-1-1 day programming 7-day programming Changeover Automatic or manual changeover models

available

Installer configuration Field settings made via screws on the back of

the thermostat System switching Mechanical switch Keyboard entry Fan switching Mechanical switch Keyboard entry Device color Beige or Premier White® color Taupe or Premier White® color

Refer to Table 14 for thermostat cross referencing information.

Automatic/manual changeover selectable

Field settings made through the keyboard

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 14. Thermostat Cross Reference Information.

Model Number Description

Replacement Remarks

T8600A One-stage heat conventional thermostat; system powered; system switch—none;

fan switch—none.

T8600A1000 Honeywell logo. T8600D2028 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; duel fuel.

TRADELINE®

T8600A1018 Canadian TRADELINE® thermostat;

Honeywell logo; degree C.

T8600D2028 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; configure for °C in Installer Setup 14; duel fuel.

T8600A1034 Canadian TRADELINE® thermostat;

Honeywell logo; Premier White® color; degree C.

T8600D2028 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; configure for °C in Installer Setup 14; duel fuel.

T8600B One-stage heat and one-stage cool conventional thermostat; system powered

T8600B1008 TRADELINE® thermostat; Honeywell logo;

system switch—HEAT-OFF; fan switch—none.

T8600D2028 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; fan selection On-Auto; duel fuel; no positive off.

T8600B1016 TRADELINE® thermostat; Honeywell logo;

system switch—none; fan switch—ON-AUTO.

T8600D2028 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; duel fuel.

T8600C One-stage heat and one-stage cool thermostat; system powered; system switch—HEAT-OFF-

COOL; fan switch—ON-AUTO

T8600C1014 TRADELINE® thermostat; Honeywell logo;

T8600D2028 Separate O & B terminals; duel fuel.

conventional.

T8600C1030 Canadian TRADELINE® thermostat;

Honeywell logo; conventional; degree C;

T8600D2028 Configure for °C in Installer Setup 14;

duel fuel; jumper R to Rc.

O and B terminals.

T8600C1048 York logo; conventional; part no.

T8600D2028 Separate O & B terminals; duel fuel.

2ET07700124A.

T8600C1055 Canadian TRADELINE® thermostat;

Honeywell logo; conventional; degree C.

T8600C1063 Trane logo; conventional; part no.

T8600D2028 Configure for °C in Installer Setup 14;

duel fuel; jumper R to Rc.

T8600D2028 Separate O & B terminals; duel fuel.

THT0594.

T8600C1071 Trane logo; electric heat; O and B

terminals; part no. THT0595.

T8600D2028 Configure for electric heat in Installer

Setup 2; jumper R to Rc. T8600C1089 Texfan logo; conventional. T8600D2028 Separate O & B terminals; duel fuel. T8600C1097 Glowcore logo; conventional; part no.

T8600D2028 Separate O & B terminals; duel fuel.

THC-3.

T8600C1105 York logo; conventional; part no. 025-27653

T8600D2028 Separate O & B terminals.

and 2ET0770224A.

T8600C1113 Canadian York thermostat; conventional;

degree C.

T8600C1121 Arcoaire logo; conventional: part no.

T8600D2028 Separate O & B terminals; configure for

°C in Installer Setup 14; duel fuel.

T8600D2028 Separate O & B terminals; duel fuel.

1506-745.

T8600C1147 Trane logo; conventional; part no.

TAYSTAT300.

T8600C1154 American Standard logo; conventional;

part no. ASYSTAT600.

T8600C1162 SUPER TRADELINE® thermostat;

T8600D2028 Separate O & B terminals; duel fuel;

jumper R to Rc.

T8600D2028 Separate O & B terminals; duel fuel;

jumper R to Rc.

T8600D2028 Jumper R to Rc. Honeywell logo; duel fuel fan control; O and B terminals.

(continued)

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 14. Thermostat Cross Reference Information. (continued)

Model Number Description

T8600C1170 Carrier thermostat; conventional; part no.

HH07AX006.

T8600C1188 Carrier thermostat; conventional; part no.

HH641-101.

T8600C1196 Canadian TRADELINE® thermostat;

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

T8600C1204 Canadian Lennox thermostat; conventional;

degree C.

Replacement Remarks

T8600D2028 Separate O & B terminals; duel fuel;

jumper R to Rc.

T8600D2028 Separate O & B terminals; duel fuel;

jumper R to Rc.

T8600D2028 Separate O & B terminals; configure for

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

T8600D2028 Separate O & B terminals; configure for

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

TRADELINE®

T8600C1212 SUPER TRADELINE® thermostat;

T8600D2028 Jumper R to Rc; taupe color. Honeywell logo; duel fuel fan control; O and B terminals.

T8600C1220 Servel logo; Premier White® color;

conventional; Robur part no. 15471-82.

T8600C1238 ICP logo; Premier White® color; duel fuel

T8600D2028 Separate O & B terminals; duel fuel;

taupe color.

T8600D2028 Jumper R to Rc; taupe color. fan control; O and B terminals; part no. HQ1149371HW.

T8600C1246 ICP logo; Premier White® color; duel fuel

T8600D2028 Jumper R to Rc; taupe color. fan control; O and B terminals; part no. HQ1149372HW.

T8600C1253 Consolidated Industries logo; Premier

White® color; conventional; part no.

T8600D2028 Separate O & B terminals; duel fuel;

taupe color.

412360.

T8600C1279 Canadian TRADELINE® (French)

thermostat; conventional.

T8600D2028 English only keyboard; separate O & B

terminals; duel fuel.

T8600D One-stage heat and one-stage cool conventional thermostat; system powered; automatic

changeover; system switch— HEAT-OFF-COOL-AUTO; fan switch— ON-AUTO

T8600D1004 TRADELINE® thermostat; Honeywell logo. T8600D2028 Separate O & B terminals; duel fuel. T8600D1012 Canadian TRADELINE® thermostat;

Honeywell logo; degree C.

T8600D2028 Separate O & B terminals; configure for

°C in Installer Setup 14; duel fuel. T8600D1020 Energy Sensor. T8600D2028 Separate O & B terminals; duel fuel. T8600D1038 Canadian Carrier thermostat; degree C;

part no. HH07AT101.

T8600D2028 Separate O & B terminals; configure for

°C in Installer Setup 14; duel fuel; T8600D1046 Trane. T8600D2028 Separate O & B terminals; duel fuel. T8600D1053 Heil Quaker thermostat; Honeywell logo;

T8600D2028 Separate O & B terminals; duel fuel.

part no. HQ1000776HW. T8600D1061 Carrier. T8600D2028 Separate O & B terminals; duel fuel. T8600D1079 Lennox logo; part no. 27H3101. T8600D2028 Separate O & B terminals; duel fuel. T8600D1103 Carrier. T8600D2028 Separate O & B terminals; duel fuel. T8600D1111 TRADELINE® thermostat; Honeywell logo;

Premier White® color. T8600D1129 Canadian TRADELINE® thermostat;

Honeywell logo; Premier White® color;

T8600D2028 Separate O & B terminals; duel fuel;

taupe color.

T8600D2028 Separate O & B terminals; configure for

°C in Installer Setup 14; duel fuel.

degree C. T8600D1137 Solitaire logo; Premier White® color;

Nordyne part no. 9132400. T8600D1145 Canadian Carrier thermostat; Premier

White® color; degree C; part no.

T8600D2028 Separate O & B terminals; duel fuel;

taupe color.

T8600D2028 Separate O & B terminals; configure for

°C in Installer Setup 14; duel fuel.

HH07AT101-W.

(continued)

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 14. Thermostat Cross Reference Information. (continued)

Model Number Description

Replacement Remarks

T8601A One-stage conventional heat thermostat; powered direct from 24 Vac transformer

TRADELINE®

T8601A1017 Canadian TRADELINE® thermostat;

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

T8601D2019 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; configure for °C in Installer Setup 14; Premier White® color.

T8601B One-stage conventional heat with fan thermostat; powered direct from 24 Vac transformer

T8601B1007 TRADELINE® thermostat; Honeywell logo;

system switch—none; fan switch—ON-AUTO .

T8601D2019 Heat/cool model can be used for heat

only; system selection Heat-Off-CoolAuto; jumper R to Rc for fan control; Premier White® color.

T8601C 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

T8601C1003 TRADELINE® thermostat; Honeywell logo. T8601D2019 Jumper R to Rc; Premier White® color. T8601C1013 Canadian TRADELINE® thermostat;

Honeywell logo; degree C.

T8601D2019 Configure for °C in Installer Setup 14;

jumper R to Rc; Premier White® color. T8601C1021 New Construction thermostat. T8601D2019 Jumper R to Rc; Premier White® color. T8601C1039 Carrier logo; part no. HH641-104. T8601D2019 Jumper R to Rc; Premier White® color. T8601C1047 New Construction thermostat; Premier

T8601D2019 Jumper R to Rc.

White® color.

T8601C1054 Trol-A-Temp® thermostat; Premier White®

color.

T8601D2027

Configure manual changeover in

Installer Setup12; replacement has Oc

terminals. T8601C1062 Trol-A-Temp® by Honeywell logo. T8601D2027

Configure manual changeover in

Installer Setup12; replacement has Oc

terminals; Premier White® color.

T8601D 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—ONAUTO

T8601D1011 Canadian TRADELINE® thermostat;

Honeywell logo; degree C.

T8601D2019 Separate O & B terminals; configure for

°C in Installer Setup 14 and

changeover in 12; jumper R to Rc;

Premier White® color. T8601D1029 New Construction thermostat. T8601D2019 Separate O & B terminals; configure

changeover in Installer Setup 12;

jumper R to Rc; Premier White® color. T8601D1045 Trol-A-Temp® by Honeywell thermostat;

Premier White® color.

T8601D1052 New Construction thermostat; Premier

White® color.

T8601D2027

T8601D2019 Separate O & B terminals; configure

Separate O & B terminals; replacement

has Oc terminals.

changeover in Installer Setup 12;

jumper R to Rc. T8601D1060 California Economizer logo; Premier

White® color.

T8601D2019 Separate O & B terminals; configure

changeover in Installer Setup 12;

jumper R to Rc. T8601D1078 Amana logo; Premier White® color;

part no. P1213701F.

T8601D2019 Separate O & B terminals; configure

changeover in Installer Setup 12;

jumper R to Rc.

68-0164—1

(continued)

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 14. Thermostat Cross Reference Information. (continued)

Model Number Description

Replacement Remarks

T8602A One-stage heat conventional thermostat; battery powered; system switch—none; fan switch—

none

T8602A1008 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.

T8602B One-stage heat conventional with fan thermostat; battery powered; system switch—none; fan

switch—ON-AUTO

T8602B1006 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.

TRADELINE®

T8602B1014 TRADELINE® thermostat; Honeywell logo;

Premier White® color.

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.

T8602C One-stage heat and one-stage cool thermostat; battery powered; system switch—HEAT-OFF-

COOL; fan switch—ON-AUTO

T8602C1004 TRADELINE® thermostat; Honeywell logo. T8602D2000 Separate O & B terminals; jumper R to

Rc.

T8602C1012 Amana logo; conventional; part no.: none. T8602D2000 Separate O & B terminals; jumper R to

Rc.

T8602C1020 Rheem logo; conventional; part no.: none. T8602D2000 Separate O & B terminals; jumper R to

Rc.

T8602C1046 SUPER TRADELINE® thermostat;

T8602D2000 Honeywell logo; duel fuel fan control; O and B terminals.

T8602C1061 Trol-A-Temp® by Honeywell thermostat;

T8602C2051

Premier White® color; conventional; O and B terminals.

T8602C1079 Trol-A-Temp® by Honeywell thermostat;

T8602C2051

Premier White® color.

conventional; O and B terminals.

T8602C1095 SUPER TRADELINE® thermostat;

T8602D2000 Taupe color. Honeywell logo; Premier White® color; duel fuel fan control; O and B terminals.

T8602C1103 Canadian TRADELINE® thermostat;

T8602D2000 Configure for °C in Installer Setup 14 . Honeywell logo; duel fuel fan control; degree C; O and B terminals.

T8602C1129 Universal Parts logo; Rheem part no.

T8602D2000 41-21615-05; conventional.

T8602C1137 ICP logo; duel fuel fan control; O and B

T8602D2000 terminals; part no. HQ1149373HW.

T8602C1145 ICP logo; Premier White® color; duel fuel

T8602D2000 Taupe color. fan control; O and B terminals; part no. HQ1149374HW.

(continued)

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Table 14. Thermostat Cross Reference Information. (continued)

Model Number Description

Replacement Remarks

T8602D One-stage heat and one-stage cool conventional thermostat; battery powered; automatic

changeover

TRADELINE®

T8602D1010 Trol-A-Temp® by Honeywell thermostat;

T8602D2026

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

T8602D1028 Trol-A-Temp® by Honeywell thermostat;

T8602D2026

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

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

CT8602C1001 Retail Honeywell logo; off-white color; duel

T8602D2000 TRADELINE® packaging. fuel fan control; system switch HEAT-OFFCOOL; fan switch ON-AUTO; separate O and B terminals; clamshell packaging.

Trol-A-Temp® by Honeywell thermostat model.

COOL DAMPER

THERMOSTAT

HEAT DAMPER

HEAT RELAY

TRANSFORMER

WIRING DIAGRAMS (Fig. 15-20)

THERMOSTAT

FAN RELAY

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

NOT AVAILABLE ON T8600A MODELS.

Fig. 15. Typical hookup of T8600 or T8602

HEAT RELAY

TRANSFORMER

in heat only application.

L1 (HOT)

M10346

COMPRESSOR CONTACTOR

FAN RELAY

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT

PUMP SYSTEMS.

AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE.

Fig. 16. Typical hookup of T8600 or T8602 in heat and cool

system with one transformer.

OTOT

OUTDOOR TEMPERATURE SENSOR

M10347

L1 (HOT)

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

L1 (HOT)

M10353

FAN RELAY

THERMOSTAT

HEAT RELAY

COMPRESSOR CONTACTOR

TRANSFORMER

HEAT DAMPER

COOL DAMPER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS.

AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE.

OTOT

OUTDOOR TEMPERATURE SENSOR

L1 (HOT)

M10354

FAN RELAY

THERMOSTAT

HEAT RELAY

L1 (HOT)

COMPRESSOR CONTACTOR

HEATING TRANSFORMER

COOLING TRANSFORMER

HEAT DAMPER

COOL DAMPER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A ONE TRANSFORMER SYSTEM.

CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS.

AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE.

T8601D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES.

OTOT

OUTDOOR TEMPERATURE SENSOR

THERMOSTAT

OTOT

HEAT RELAY

OUTDOOR TEMPERATURE SENSOR

L1 (HOT)

HEATING TRANSFORMER

M10348

COMPRESSOR CONTACTOR

L1 (HOT)

COOLING TRANSFORMER

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A

ONE TRANSFORMER SYSTEM.

CAN BE USED FOR CHANGEOVER VALVE ON SINGLE-STAGE HEAT PUMP SYSTEMS.

AVAILABLE ON SELECT MODELS. OT WIRES MUST HAVE A SEPARATE CABLE FROM THE THERMOSTAT CABLE.

T8600D MODELS REQUIRE POWER TO R TERMINAL AT ALL TIMES.

FAN RELAY

COOL DAMPER

HEAT DAMPER

Fig. 17. Typical hookup of T8600 or T8602 in heat and

cool system with two transformers.

THERMOSTAT

Fig. 19. Typical hookup of T8601 in heat

and cool system with one transformer.

HEAT RELAY

FAN RELAY

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

POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

OVERLOAD PROTECTION AS REQUIRED.

NOT AVAILABLE ON "A" MODELS.

TRANSFORMER

L1 (HOT)

M10357

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

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

68-0164—1

T8600D, T8601D AND T8602D CHRONOTHERM ® IV DELUXE PROGRAMMABLE THERMOSTATS

Home and Building Control

Honeywell Inc. Honeywell Plaza P.O. Box 524 Minneapolis MN 55408-0524

Home and Building Control

Honeywell Limited-Honeywell Limitée 155 Gordon Baker Road North York, Ontario M2H 3N7

Honeywell Asia Pacific Inc.

Room 3213-3225 Sun Hung Kai Centre No. 30 Harbour Road Wanchai Hong Kong

Honeywell Latin American Region

480 Sawgrass Corporate Parkway Suite 200

Honeywell Europe S.A.

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Sunrise FL 33325

Helping You Control Your World

68-0164—1 J.H. Rev. 7-97 Printed in U.S.A. www.honeywell.com/yourhome

68-0164—1

Printed on recycled paper containing at least 10% post-consumer paper fibers.

Honeywell T8600D, T8602D, T8601D User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

APPLICATION

T8600/T8601/T8602 FEATURES AND BENEFITS

SPECIFICATIONS

ORDERING INFORMATION

WIRING

SETTINGS

THERMOSTAT INFORMATION

PROGRAMMING

WIRING DIAGRAMS (Fig. 15-20)