t8611 chronotherm iv plus

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Deluxe Programmable Thermostat 69-1400

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Page 1: T8611 Chronotherm IV Plus

1 69-1400

DeluxeProgrammable

Thermostat

69-1400

Page 2: T8611 Chronotherm IV Plus

69-1400 2

FEATURES• Program up to four time periods and temperature setpoints

for each daily schedule.

• Set different schedules for each day of the week.

• Backlit for easy readability of display when a key is pressed.

• Press Information i key for present setting information andoutdoor temperature (select models).

• Select fan operation for each period of each day (selectmodels with fan key).

• Temporarily set the temperature warmer or cooler.

• Daylight Time key for easy switching in and out of DaylightSavings Time.

• Program end of Hold (1 to 255 days) for added comfort andenergy savings.

• Copy key for easier programming.

Page 3: T8611 Chronotherm IV Plus

3 69-1400

PROGRAMMINGThe keyboard is located behind the thermostat cover with threefrequently used keys by the display. The thermostat displayshows day, time, program period, temperature, system and fanoperation selection.

The thermostat can be set for four times and upto eight temperatures for each day of the week(28 independent time and 56 temperature settings).The ▲ and ▼ keys provide quick temporary tempera-ture changes to increase your comfort. The Hold Tempkey provides energy efficient operation for extendedperiods of time.

Before starting the programming procedure, you can use thefollowing charts to organize your program schedule. The factorypreprogrammed time, temperature and fan settings are shownin brackets. If you choose not to program a daytime energysavings period, press the period key (Leave or Return) until thetime is blank. The fan setting feature is available on selectthermostat models.

Page 4: T8611 Chronotherm IV Plus

69-1400 4

Period Start Time Heat Setpoint

Monday

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)]

Tuesday

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)]

Wednesday

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)]

Thursday

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)]

Friday

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)]

Page 5: T8611 Chronotherm IV Plus

5 69-1400

Cool Setpoint Fan Setting

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

Page 6: T8611 Chronotherm IV Plus

69-1400 6

Period Start Time Heat Setpoint

Saturday

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)]

Sunday

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)]

Setting the Current Day and TimeIMPORTANT

Always press the keys with your fingertip or similarblunt tool. Sharp instruments like pens and pencilpoints can damage the keyboard.

� Press Set Current Day/Time.

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

M14619

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/TimeSet Current

Day/TimeWake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Set Day/Time

Mon

PM

Page 7: T8611 Chronotherm IV Plus

7 69-1400

Cool Setpoint Fan Setting

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

[78°F (25.5°C)] [Auto]

[85°F (29.5°C)] [Auto]

[78°F (25.5°C)] [Auto]

[82°F (28°C)] [Auto]

� Press Day until the current day is displayed.

NOTE: Sun = Sunday, Mon = Monday, Tue = Tuesday,Wed = Wednesday, Thu = Thursday, Fri = Friday,Sat = Saturday.

� Press Time ▲ or Time ▼ until the current time isdisplayed.

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

M14620

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

Day

DayHeat/CoolSettings

DaylightTime

Copy

Set Day/Time

PM

Tue

M14621

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

Day

Time

Heat/CoolSettings

DaylightTime

Copy

Set Day/Time

AM

Tue

Page 8: T8611 Chronotherm IV Plus

69-1400 8

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

� Press Run Program.

Programming the First DayStart by programming the Wake time and temperature (and fanoperation on select models) for any one day:

� Press Wake.

� Press Day until the desired day is displayed.

M14622

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

DaylightTime

Copy

Set Day/Time

AM

DSTTue

M14623

Time Set Program

System Fan

RunProgramRun

Program Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

CopyWake

Room

System

Fan

Heat

Auto

AM

DSTTue

M14635

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake

WakeLeave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

Wake

System

Fan

Heat

Auto

AM

HeatTue

Setting

M14636

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

Day

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

MonWake

System

Fan

Heat

Auto

AM

Heat

Setting

Page 9: T8611 Chronotherm IV Plus

9 69-1400

� Press Time ▲ or Time ▼ until the desired Wake time isdisplayed.

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

� Press increase ▲ or decrease ▼ key until the desiredWake 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 to37°C) for cooling.

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

� Press Heat/Cool Settings to switch to other systemtemperature setpoint.

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

M14637

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Time

Set Program

MonWake

System

Fan

Heat

Auto

AM

Heat

Setting

M14638

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

MonWake

System

Fan

Heat

Auto

AM

Heat

Setting

M14639

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

Heat/CoolSettings

DaylightTime

Copy

Set Program

MonWake

System

Fan

Heat

Auto

AM

Cool

Setting

Page 10: T8611 Chronotherm IV Plus

69-1400 10

� Press increase ▲ or decrease ▼ key until the desiredtemperature setpoint is displayed.

� Press Leave, Return or Sleep and repeat steps �, �, �and � for programming the rest of the day. The first dayis now programmed.

IMPORTANTRepeat steps � through � for each day of the weekthat has a different program than the first day. Referto Copying a Day section to copy any program dayto another.

Press Run Program when all days are programmed.

Copying a DayNOTE: The thermostat must be in the program mode to use

the copy feature. Go to step � if the thermostat isalready in the program mode.

� Press Wake.

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

M14640

Set Program

MonWake

System

Fan

Heat

Auto

AM

Cool

Setting

M14641

Time Set Program

System Fan

RunProgramRun

Program Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

WakeRoom

System

Fan

Heat

Auto

AM

DSTTue

M14642

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time WakeWake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

MonWake

System

Fan

Em Heat

Auto

AM

HeatTue

Setting

Page 11: T8611 Chronotherm IV Plus

11 69-1400

� Press Day to select the day to be copied if different fromthe day displayed.

� Press Copy.

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

� Press Copy.

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

� Repeat steps � through � for all the days desired.

� Press Run Program.

M14643

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

Day

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

MonWake

System

Fan

Heat

Auto

AM

Heat

Setting

M14644

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

CopyMon

M14645

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

Day

DayHeat/CoolSettings

DaylightTime

Copy

Mon Wed

M14646

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Copy

Page 12: T8611 Chronotherm IV Plus

69-1400 12

Clearing Program PeriodNOTE: The thermostat must be in the program mode to use

the clear feature. Go to step � if the thermostat isalready in the program mode.

� Press Wake, Leave, Return or Sleep.

� Press Day until the desired day is displayed.

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

NOTE: Wake cannot be cleared.

� Repeat steps � and � for all the periods to be cleared.

� Press Run Program.

M14647

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake LeaveLeave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

MonLeave

System

Fan

Heat

On

AM

Heat

Setting

M14648

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

Day

DayHeat/CoolSettings

DaylightTime

Copy

Set Program

Leave

System

Fan

Heat

On

AM

HeatSat

Setting

M14649

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Leave

Set Program

Leave HeatSat

Setting

Page 13: T8611 Chronotherm IV Plus

13 69-1400

Operating the DeluxeProgrammable ThermostatSetting Temporary TemperaturesChanging Temperature Setting Until the Next Program PeriodPress increase ▲ or decrease ▼ key until the desired tem-perature setpoint is displayed.

NOTE: If ▼ or ▲ appear under the temperature display, itmeans that both the heating and cooling setpoints arebeing adjusted. Tapping the key will change both theheat and cool setpoints by one degree. Press i afterthe desired setpoint is reached to check the setpoints.

NOTE: The temporary temperature setting is displayed forapproximately 3 seconds. The setting is cancelledwhen the next period starts or when Run Programis pressed.

Changing Temperature Setting Indefinitely� Press Hold Temp.

� Press increase ▲ or decrease ▼ key to change thesetting, if desired.

M14651

Time Set Program

System Fan

RunProgram

Hold Temp

Hold TempSet CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

System

Fan

Heat

AutoHeat

Setting

M14652

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

System

Fan

Heat

AutoHeat

Setting

M14650

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Heat

Setting

Page 14: T8611 Chronotherm IV Plus

69-1400 14

� Press Heat/Cool Settings to change between heat andcool settings.

� Press increase ▲ or decrease ▼ key to adjust tempera-ture settings.

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

� Press Run Program to cancel the Hold and to return tothe program.

Changing Temperature Setting Until a Designated Day and Period� Press Hold Temp twice.

� Press Time ▲ or Time ▼ until the desired number ofdays is displayed (1 to 255 days). (Example: 18 = Holdwill override the daily programs for 18 days)

M14653

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

Heat/CoolSettings

DaylightTime

Copy

Cool

Setting

M14654

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Cool

Setting

M14655

Time Set Program

System Fan

RunProgram

Hold Temp

Hold TempSet CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Wake

System

Fan

Heat

Auto

Hold for

Heat

Days

Setting

M14656

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Time

Wake

System

Fan

Heat

Auto

Hold for

Heat

Days

Setting

Page 15: T8611 Chronotherm IV Plus

15 69-1400

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

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

NOTE: When the System is set for Auto, both heat andcool settings are needed. If the System is setfor Heat, only the Heat setpoint is needed or ifCool is selected, only the Cool setpointis needed.

� Press Heat/Cool Settings to change between heat andcool settings.

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

NOTE: In this example, the thermostat uses the Holdsetting for eighteen days and returns to the dailyprograms at the Return period start time. Thetemperature settings are heating 54°F andcooling 84°F. Only the heating temperature isused because the System is set for Heat. Thethermostat will use both the heating andcooling temperature settings when the Systemis set to Auto.

M14657

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return

ReturnSleep

DayHeat/CoolSettings

DaylightTime

Copy

System

Fan

Heat

Auto

Hold for

Heat

Days

Setting

Return

M14658

System

Fan

Heat

Auto

Hold for

Heat

Days

Setting

Return

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Page 16: T8611 Chronotherm IV Plus

69-1400 16

IMPORTANTIf the Hold needs to be cancelled before the designatedtime, press Run Program to return to the program.

Setting System and FanThe system default setting is Heat and the fan default setting isAuto. Use the System and Fan keys to change the settings. Thefan 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 indoortemperature.

Fan settings control the system fan as follows:On: Fan operates continuously.Auto: Fan operates with equipment.

Setting Temporary Fan OperationIf your thermostat has a Fan key and this feature, press Fanuntil the desired fan operation is selected. This fan setting willbe in effect until the next regularly scheduled period starts.

M14625

Hold Temp

RunProgram

CopyDaylightTime

Set CurrentDay/Time

System Fan

Time Set Program

DaySystem

Fan

Wake Leave Return Sleep

Heat/CoolSettings

Page 17: T8611 Chronotherm IV Plus

17 69-1400

Using Daylight Savings Time FeatureThis feature allows you to change in and out of DaylightSavings Time with a key press. When pressed in the fall, thetime will go back one hour. In the spring, the time will go aheadone hour and the display will show DST. See Setting theCurrent Day and Time section for initial setting instructions.

NOTE: Pressing Daylight Time more than once within a fiveminute period will scroll you through various timeoptions (Example: one hour earlier or later with orwithout DST). Pressing Daylight Time six times in a fiveminute period will return you to your original setting.

Displaying the Outdoor TemperatureIf your thermostat is equipped with an outdoor sensor, you cancheck the temperature at the sensor by pressing i once.

M14659

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

DaylightTime

WakeRoom

System

Fan

Em Heat

Auto

AM

DSTTue

M14660

Time Set Program

System Fan

RunProgram

Hold Temp

Set CurrentDay/Time Wake Leave Return Sleep

DayHeat/CoolSettings

DaylightTime

Copy

Outdoor

Page 18: T8611 Chronotherm IV Plus

69-1400 18

Adaptive Intelligent Recovery™ ControlBreakthrough Technology Senses Temperature MoreLike You DoYour Deluxe Programmable Thermostat is so smart, it’salmost human.• Your body perceives temperature from a variety of sources,

not only from the air in the room, but also from yoursurroundings—walls, windows and furnishings.

• Humans feel differences in temperature as slight as twodegrees Fahrenheit.

• Common household thermometers and standard thermostatssense only air temperature, which might or might not reflecthow hot or cold the room actually feels to a human being.

• Your new thermostat reads both the temperature of the walland the air—and responds to temperature changes as littleas one degree Fahrenheit—so room temperature is morelikely to feel right to you and your family.

The Optimum Comfort and Energy Savings Solution

70°F

60°FSLEEP

HEATING MODE

WAKE

SETPOINTTEMPERATURE

ACTUALTEMPERATURE

THERMOSTAT USES THE SAME SCHEME TO RETURN TO LOWER COMFORTTEMPERAURE DURING THE COOLING SEASON.

M15084

Page 19: T8611 Chronotherm IV Plus

19 69-1400

The Deluxe Programmable Thermostat is actually a small butpowerful computer. When calculating the time to turn on yourheating or cooling system, it considers (1) air temperature, (2)wall temperature, and (3) the time you want the comforttemperature established.• During the Adaptive Intelligent Recovery™ time, the

thermostat immediately increases the temperature setpointfrom the energy savings to the comfort temperature, andleaves the equipment running continuously. This savesenergy by avoiding cycling the equipment and overshootingthe comfort temperature. The thermostat displays Recoverywhenever the thermostat activates the Adaptive IntelligentRecovery™ feature.

• This thermostat learns from experience. Each day it checkshow closely it hit the recovery target and adjusts the nextday recovery start time accordingly.

• It typically takes four to eight days after installation for thethermostat to adjust to the local weather, your lifestyle, theconstruction of your home and your heating/cooling system.The thermostat calculates the Leave/Return recoveryseparately from the Sleep/Wake recovery.

• With the thermostat, you can choose whether you want touse the Adaptive Intelligent Recovery™ setting or theconventional recovery. The thermostat comes preset to theAdaptive Intelligent Recovery™ setting. When conventionalrecovery is desired, call your service technician for assis-tance. Use the Adaptive Intelligent Recovery™ setting whenyou want to choose the exact time that the room reachesyour comfort temperature. Use conventional recovery whenyou prefer to choose the exact time your heating or coolingsystem comes on to start recovery.

M14561

MonSleep

Room

System

Fan

Em Heat

Auto

AM

Heat

Recovery

Page 20: T8611 Chronotherm IV Plus

69-1400 20

Saving Energy Across theUnited States and Canada• Save up to 30% in energy costs. The Deluxe Programmable

Thermostat offers you complete comfort and a low costeasy way to save on your energy bills.

• The energy saving percentages listed on the following mapsare based on setting the program down in winter or up insummer for eight hours.

• If the time period you choose for setback is longer, youcould see even greater energy savings. The energy savingperiod must be at least two hours long to save any energy.

Find the city closest to your home. The energy savings listedwill be similar to the savings you can expect.

30%

28%

26%

24%

22%

20%

18%

16%

14%

12%

8%

6%

2%

10%

4%

MinneapolisSt. PaulMontrealOttawaToronto

BuffaloClevelandMilwaukee

EdmontonReginaWinnipeg

CalgaryMonctonNorth BayQuebecSt. John's

Halifax Vancouver DenverDes Moines OmahaSalt Lake City

BostonChicagoDetroitPittsburghIndianapolis

CincinnatiKansas CitySt. LouisColumbus

New YorkPhiladelphiaSeattle

LouisvillePortlandWash., D C

San Francisco

DallasAtlanta

Los Angeles

App

roxi

mat

e pe

rcen

tage

of e

nerg

y co

st s

avin

gs

Savings for Once-A-Day10°F (5°C) decrease

Savings for Twice-A-Day10°F (5°C) decrease*

Savings for 5°F (3°)summer increase

TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA

*Based on 10°F (5°C) decrease—(5°F [3°C] decrease gives approximately 55 percent of these savings). M2416A

San Diego

Page 21: T8611 Chronotherm IV Plus

21 69-1400

(Continued)

NOTICE: This equipment is a Class B digital apparatus,which complies with Canadian Radio InterferenceRegulations, CRC c. 1374.

TROUBLESHOOTING GUIDESymptom Action

Display will notcome on.

• Check if the thermostat is mounted andlatched on the wallplate—mount andlatch the thermostat on the wallplate.

• Check if the circuit breaker is tripped—reset the circuit breaker.

• Check if the fuse is blown—replace the fuse.

• Check if the system switch at theequipment is in the Off position—set tothe On position.

• Check wiring between thermostat and HVAC equipment—replace anybroken wires.

• If 24 Vac is present, proceed withtroubleshooting.

Temperaturesettings will not change(Example:cannot set theheating higheror the coolinglower).

• Check that the temperature setpoints are:- heating: 40 to 90°F (4.5 to 32°C)- cooling: 45 to 99°F (7 to 37°C).

Page 22: T8611 Chronotherm IV Plus

69-1400 22

Symptom Action

Heating will notcome on.

• Check that setpoint is above roomtemperature.

• Check if the circuit breaker is tripped—reset the circuit breaker.

• Check if the fuse is blown—replace the fuse.

• Check if the system switch at theequipment is in the Off position—set toOn position.

• If 24 Vac is present, proceed withtroubleshooting.

• Wait five minutes for the system to respond.

• Set system selection to Heat.

Cooling will notcome on.

• Check that setpoint is below roomtemperature.

• Check if the circuit breaker is tripped—reset the circuit breaker.

• Check if the fuse is blown—replace thefuse.

• Check if the system switch at theequipment is in the Off position—set toOn position.

• If 24 Vac is present, proceed withtroubleshooting.

• Wait five minutes for the system to respond.

• Set system selection to Cool.

System onindicator(flame=heat,snowflake=cool)is lit, but nowarm or cool airis coming fromthe registers.

Wait a minute after seeing the flame orsnowflake and then check the registers.

Troubleshooting Guide (continued).

Page 23: T8611 Chronotherm IV Plus

23 69-1400

WARRANTYHoneywell warrants this product, excluding battery, to be free from defectsin the workmanship or materials, under normal use and service, for a periodof one (1) year from the date of purchase by the consumer. If, at any timeduring the warranty period, the product is defective or malfunctions,Honeywell shall repair or replace it (at Honeywell’s option) within areasonable period of time.

If the product is defective,(i) return it, with a bill of sale or other dated proof of purchase, to the

retailer from which you purchased it, or(ii) package it carefully, along with proof of purchase (including date of

purchase) and a short description of the malfunction, and mail it,postage prepaid, to the following address:

Honeywell Return GoodsDock 4 MN10-38601885 Douglas DriveGolden Valley, MN 55422

This warranty does not cover removal or reinstallation costs. This warrantyshall not apply if it is shown by Honeywell that the defect or malfunction wascaused by damage which occurred while the product was in the possessionof a consumer.

Honeywell’s sole responsibility shall be to repair or replace the productwithin the terms stated above. HONEYWELL SHALL NOT BE LIABLE FORANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTALOR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY ORINDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS ORIMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states donot allow the exclusion or limitation of incidental or consequential damages,so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELLMAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIEDWARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITYAND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TOTHE ONE YEAR DURATION OF THIS WARRANTY. Some states do notallow limitations on how long an implied warranty lasts, so the abovelimitation may not apply to you.

This warranty gives you specific legal rights, and you may have other rightswhich vary from state to state.

If you have any questions concerning this warranty, please write ourCustomer Assistance Center, Honeywell Inc., P.O. Box 524, Minneapolis,MN 55440-0524 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to5:30 p.m., Central time. In Canada, write Retail Products ON15-02H,Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York,Ontario M2H 3N7.

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