Honeywell T8602D User Manual

Page 1

APPLICATION

T8602D Chronotherm® IV

Programmable Thermostats

INSTALLATION INSTRUCTIONS

The T8602 Chronotherm® IV Programmable Thermostat provides electronic control of 24 Vac single-stage heating and cooling systems or 750 mV heating and 750 mV

Table 1. Description of T8602 Thermostats.

T8602 System Changeover

D Heat-Cool Manual or

MERCURY NOTICE

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

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

Automatic

Selectable

System

Selection

Heat-Off-Cool or

Heat-Off-Cool-Auto

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 1.5m (5 ft) above the floor in an area with good air circulation at average temperature. See Fig. 1.

cooling. Refer to Table 1 for a general description of the thermostat. All T8602 Thermostats are powered by batteries.

Fan

Selection Comments

On-Auto System and fan selections are done

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.

by keyboard.

Wallplate Installation

The thermostat can be mounted horizontally on the wall or on a 50.8 mm x 101.6 mm (2 in. x 4 in.) wiring box. Position wallplate horizontally on the wall or on a

50.8 mm x 101.6 mm (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. Remove the wallplate from the wall and drill two

4.76 mm (3/16 in.) holes in the wall (if drywall) as marked. For firmer material such as plaster, drill two 5.56 mm (7/32 in.) 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.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

)

L (

Fig. 1. Typical location of thermostat.

WALL

WALL ANCHORS (2)

WIRES THROUGH WALL

Fig. 2. Mounting the wallplate.

WIRING

All wiring must comply with local electrical codes and ordinances. Refer to Fig. 3 through 6 for typical hookups. A letter code is located near each terminal for identification.

CAUTION

Electrical Hazard. Can cause electrical shock or equipment damage.

Disconnect power before wiring.

MOUNTING HOLES

MOUNTING SCREWS

M15044

YES

1.5 METERS (5 FEET)

1. Loosen the terminal screws on the wallplate and

IMPORTANT

2. Securely tighten each terminal screw.

3. Push excess wire back into the hole.

4. Plug the hole with nonflammable insulation to pre-

HOT)

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

JUMPER RC TERMINAL TO R TERMINAL WHEN INSTALLED ON A

ONE TRANSFORMER SYSTEM.

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

M10856

connect the system wires. See Fig. 7.

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

vent drafts from affecting the thermostat.

THERMOSTAT

COMPRESSOR CONTACTOR

FAN RELAY

COOLING TRANSFORMER

Fig. 3. Typical hookup in heat and cool

system with two transformers.

HEAT RELAY

HEATING TRANSFORMER

OUTDOOR TEMPERATURE SENSOR

OTOT

L1 (HOT

M10855

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

)

M10347A

M G

F I 7

THERMOSTAT

COMPRESSOR CONTACTOR

COOL DAMPER

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. 4. Typical hookup in heat and cool system with

PILOTSTAT CONTROL (IF USED)

ILLIVOLTAGE ENERATOR

HEAT

RELAY

HEAT DAMPER

one transformer.

TH/

MILLIVOLTAGE GAS CONTROL

MILLIVOLT HEATING-ONLY WALLPLATE

OUTDOOR TEMPERATURE SENSOR

TRANSFORMER

LIMIT CONTRO

M2931

OTOT

L1 (HOT

Fig. 5. Typical hookup in millivoltage heating circuit.

MILLIVOLT HEATING-24Vac

PILOTSTAT CONTROL (IF USED)

TH/

ILLIVOLTAGE ENERATOR

L1 (HOT)

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

Fig. 6. Typical hookup in millvoltage heating and

OR WRAPAROUND

NSERTION STRIP

/16 IN. (11 MM).

MILLIVOLTAGE GAS CONTROL

24 Vac cooling circuit.

COOLING WALLPLATE

LIMIT CONTROL

FAN RELAY

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

RC Y O

CHANGEOVER RELAY

COOLING CONTACTOR

M2942

M482

Fig. 7. Correct wiring technique.

Mounting Thermostat

1. Engage tabs at the top of the thermostat and wall-

plate. See Fig. 7.

2. Press lower edge of case to close and latch.

NOTE: To remove the thermostat from the wall, first pull

out at the bottom of the thermostat; remove top last.

ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.

PRESS LOWER EDGE OF CASE TO LATCH.

M1462

Fig. 8. Mounting thermostat on wallplate.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

I O T A

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,

NCREASE TIME SETTING

R SCROLL FORWARD HROUGH INSTALLER SETUP ND 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

SET WAKE TIMES AND SETPOINTS

Set Current

Run

Day/Time

Program

Hold Temp

Day

Daylight

Time

COPY ONE PROGRAMMED DAY TO ANOTHER DAY

Fig. 9. T8602D key locations and descriptions.

SETTINGS

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. 10. 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.

• check Self-Test,

• display outdoor temperature (select models),

• set the system operation,

• set the fan operation.

See Fig. 9 for the location of the keys.

SET LEAVE TIMES AND SETPOINTS

Time Set Program

Wake

Heat/Cool

Settings

Copy

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

SET RETURN TIMES AND SETPOINTS

Leave

Run

Program

Hold Temp

Fig. 10. Thermostat System and Fan key locations.

NOTE: Always press the keys with your fingertip or sim-

INCREASE TEMPERATURE SETTING OR SCROLL FORWARD THROUGH INSTALLER SETUP OPTIONS

DECREASE TEMPERATURE SETTING OR SCROLL BACKWARD THROUGH INSTALLER SETUP OPTION

DISPLAY INFORMATION SUCH AS PRESENT SETTINGS AND OUTDOOR TEMPERATURE

Leave

Wake

SET SLEEP TIMES AND SETPOINTS

SELECT FAN OPERATION

SELECT SYSTEM OPERATION

CHANGE BETWEEN HEATING AND COOLING SETPOINTS

Sleep

Return

System Fan

M14625

M14624

System

Fan

Return Sleep

System Fan

Time Set Program

Set Current Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

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

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

t f

Temperature Settings

Refer to Table 2 for the default program settings. 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 Owner’s Guide, form 69-0940, for complete instructions on changing the program.

Table 2. Default Program Settings.

Period Time

Heat

Setpoint

Wake 6:45 AM 20°C 25°C Auto

Leave 8:45 AM 4.5°C 37°C Auto

Return 5:00 PM 20°C 25°C Auto

Sleep 10:00 PM 4.5°C 37°C Auto

Cool

Setpoint

Fan

Setting

Wait Recovery

Hold for

Filter

Em Ht

Mon

TueWed Thu Fri Sat Sun

Wake Leave Return Sleep

Set Day/TimeSet Program

Aux Ht

Days

AM PM

Temporary Setting

Repl Batt

DST

Fig. 11. Display of all LCD segments.

Heat

OutdoorRoom

Cool

System

Em Hea

Fan

Coo Auto

Auto

M1455

INSTALLER SETUP

NOTE: For most applications, the thermostat factory-

settings do not require changing. Review the factory settings in Table 2 and, if no changes are necessary, go to Installer Self-Test section.

The Installer Setup is used to customize the thermostat to specific systems. Some of the options include temperature display, system changeover and outdoor temperature display. Installer Setup numbers are listed in Table 3. The table includes all the configuration options and the factory-settings for the T8602.

A combination of key presses is 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. 11 and 12.

— 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 backward, press

the Time ∇ key.

— To exit the Installer Setup, press Run Program.

INSTALLER SETUP NUMBER DISPLAY (COLUMN 2 OF TABLE 3)

Fig. 12. Display of Installer Setup number and

FACTORY SETTING OR OTHER CHOICE DISPLAY (COLUMN 3 OR 5 OF TABLE 3)

setting.

CAUTION

Electric Heat Configuration Hazard. Can cause equipment damage.

Configure electric heat system to 1 in Installer Setup number 2 to prevent system running without fan.

IMPORTANT

Only configured 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 3 factory settings and mark any desired changes in the Actual Setting column. When Installer Setup is complete, review the settings to confirm that they match the system.

M14618

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

Table 3. Thermostat Installer Setup Options.

Select

Installer Setup

Number (Press

Time ∆ key to

change)

Factory Setting

Other Choices

(Press  or  key to change)

Not Used. 1 — — — — —

Fan operation.

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

0 Conventional

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.

4 6 6—6 cph used

for conventional heat.

1, 3, or 91—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

13 1 Conventional

changeover

recovery (system starts recovery at programmed time).

0 or 2 0—Auto changeover

2—Auto only

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

Not Used. 14 thru 15 — — — — —

Clock format. 16 0 12-hour clock

format.

1 24-hour clock format.

Not Used. 17 thru 23 — — — — —

Outdoor temperature display (select models).

24 0 No outdoor

temperature is displayed.

1 Outdoor temperature is

displayed. Needs a C7089B1000 Outdoor Temperature Sensor to operate.

Not Used. 25 thru 32 — — — — —

Minimum off time for the compressor.

Temperature range stops in heating.

Temperature range stops in cooling.

33 5 5 minute

34 32.0 Highest setting

35 7.0 Lowest setting

minimum off time for the compressor.

for heating setpoint.

for cooling setpoint.

0 thru 4 Minimum number of

4.5 to

31.5

7.5 to

37.0

minutes (0 thru 5) the compressor will be off between calls for the compressor.

Temperature range (0.5°C increments) of heating setpoint settings.

Temperature range (0.5°C increments) of cooling setpoint settings.

Not Used. 36 — — — — —

Actual

SettingDisplay Description Display Description

—

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Page 7

Select

Temperature display adjustment.

Furnace Air Filter Timer.

Humidifier Pad Monitor.

Ultraviolet (UV) Air Treatment System Lamp Monitor.

T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

Table 3. Thermostat Installer Setup Options. (Continued)

Installer Setup

Number (Press

Time ∆ key to

change)

37 0 No difference in

Factory Setting

displayed temperature and actual room temperature.

(Press  or  key to change)

1.5 thru

-1.5

43 0 Off 1, 2, 3, 41 – 10 days

44 0 Off 1, 2, 3 1 – 90 days

45 0 Off 1 1 – 365 days

Other Choices

.5—Display adjusts to

0.5°C higher than actual room temperature.

1.0—Display adjusts to

1.0°C higher than actual room temperature.

1.5—Display adjusts to

1.5°C higher than actual room temperature.

-.5—Display adjusts to .5°C lower than actual room temperature.

-1.0—Display adjusts to -

1.0°C lower than actual room temperature.

-1.5—Display adjusts to -

1.5°C lower than actual room temperature.

2 – 30 days 3 – 60 days 4 – 120 days (Time counted when heat, cool or fan is running.)

2 – 180 days 3 – 365 days (Time counted by calendar days in heat mode.)

(Times counted by calendar days in any mode.)

Actual

SettingDisplay Description Display Description

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 using the new settings. Be sure to set the current day and time immediately.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

t f

Setting Current Day and Time

1. Press Set Current Day/Time.

NOTE: On initial powerup or after an extended power

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

Set Day/Time

Time Set Program

Set Current

Run

Leave

Wake

Set Current

Day/Time

Program

Hold Temp

Return Sleep

Day/Time

Heat/Cool

Day

Settings

Daylight

Copy

Time

System Fan

Mon

2. Press Day until the current day is displayed.

NOTE: Sun=Sunday, Mon=Monday,

Tue=Tuesday, Wed=Wednesday, Thu=Thursday, Fri=Friday, Sat=Saturday.

Time Set Program

Set Current

Run

Leave

Wake

Return Sleep

Day/Time

Day

3. Press Time ∆ or Time ∇ until the current time is dis-

NOTE: Tapping the Set Current Day/Time changes the

Program

Heat/Cool

Hold Temp

Day

Settings

Daylight

Copy

Time

played.

time in one hour increments.

Time

Time Set Program

Set Current

Run

Leave

Wake

Day/Time

Program

Heat/Cool

Hold Temp

Day

Settings

Daylight

Copy

Time

System Fan

Return Sleep

System Fan

M1461

Set Day/Time

Tue

M1462

Set Day/Time

Tue

M1462

INSTALLER SYSTEM TEST

Use the Installer System Test to check the thermostat operation. Refer to Table 4 for a list of the available system tests.

CAUTION

Equipment Damage Hazard. Minimum compressor off-time is bypassed during Installer System Test.

Avoid cycling compressor quickly.

To start the system test: Press and hold the increase  and decrease  keys at the same time until 10 appears. All segments of the display will be displayed before the 10 appears. See Fig. 13 and 14.

Table 4. Tests Available In Installer System Test.

Tes t

Number System Test Description

10-19 Heating equipment can be turned on and

30-39 Cooling equipment can be turned on and

40-49 Fan equipment can be turned on and off.

60 0 to 60 19

70-79 Thermostat information, including date

off.

Keyboard keys test.

code and software versions, is displayed.

NOTE: If the current time is Daylight Savings Time,

press Daylight Time until DST is displayed.

Set Day/Time

Daylight

Time

Time Set Program

Set Current

Run

Leave

Wake

Return Sleep

Day/Time

Program

Heat/Cool

Hold Temp

System Fan

Day

Settings

Daylight

Copy

Time

Tue

DST

M1462

4. Press Run Program.

System

Run

Program

Time Set Program

Set Current

Run

Leave

Wake

Return Sleep

Day/Time

Program

Heat/Cool

Hold Temp

System Fan

Day

Settings

Daylight

Copy

Time

Wake

Tue

DST

69-1510-4 8

Heat

Fan

Room

Auto

M1462

Wait Recovery

Hold for

Filter

Mon

TueWed Thu Fri Sat Sun

Wake Leave Return Sleep

Em Ht

Set Day/TimeSet Program

Aux Ht

Days

AM PM

Temporary Setting

Repl Batt

DST

Heat

OutdoorRoom

Cool

System

Em Hea

Fan

M1455

Coo Auto

Auto

Fig. 13. Display of all LCD segments.

M1461

Fig. 14. Display of test number.

Refer to Table 5 for the directions and results of the specific tests.

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

Time ∇ to go back to the previous test. Press Run Program to exit the System Test

Page 9

T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

Table 5. Installer System Test Options.

Keys to

Press

Tes t

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.

NOTE: Press any key and the displayed numbers will change. Press Time ∇ to go to the previous test and Time ∆ to

go to the next test. The Run Program key does not exit this test. Press Time ∆ or Time ∇ and then the Run Program key to exit.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

THERMOSTAT INFORMATION

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

M1461

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).

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

M1461

4. Press the increase  key again to display the soft- ware revision number. (Example: 001 = Revision number 1).

M1461

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

M1461

CHECKOUT

Outdoor Temperature Sensor (Select Models)

Allow the outdoor temperature sensor to absorb the outdoor air for a minimum of five minutes before taking a reading.

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T8602D CHRONOTHERM® IV PROGRAMMABLE THERMOSTATS

TROUBLESHOOTING GUIDE

Table 6. Troubleshooting Guide.

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.

Heating or cooling come on momentarily and shut off.

Thermostat is not being powered.

Room temperature display has been reconfigured.

Thermostat is configured for °F or °C display.

Bad thermostat location. Relocate the thermostat.

The upper or lower temperature limits were reached.

The setpoint temperature range stops were configured.

No power to the thermostat. • Check for 24 Vac between R and W terminals (check for

Thermostat minimum off time is activated.

System selection is not set to Heat.

Heating setpoint is below room temperature.

No power to the thermostat. • Check for 24 Vac between R or RC and Y terminals

Thermostat minimum off time is activated.

System selection is not set to Cool.

Cool setpoint is above room temperature.

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

• Check if batteries are present and installed correctly. — If batteries are present and installed correctly, replace

thermostat.

Enter Installer Setup number 37 and reconfigure the display.

Enter Installer Setup number 14 and reconfigure the display.

Check the temperature setpoint:

• Heating limits are 4.5 to 32°C

• Cooling limits are 7 to 37°C

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

750 mV on PowerPile

— 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.

— 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.

Add resistor in parallel with load or install interface relay.

Systems).

11 69-1510-4

Page 12

Table 6. Troubleshooting Guide. (Continued)

Symptom Possible Cause Action

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

Select models.

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

Outdoor sensor is connected incorrectly.

Wrong sensor. Replace sensor with C7089B1000 Sensor.

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.

have OT terminals and a C7089B1000 Sensor installed.

Refer to C7089B1000 Installation Instructions and check wiring between the thermostat and sensor.

Automation and Control Solutions

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