69-0743 - Programmable Multistage Thermostat · so smart, it’s almost human. Your body perceives temperature from a variety of sources, not only from the air in the room, but also

Programmable Multistage ThermostatOWNER’S GUIDE

Your new programmable thermostat is a precision instrument that’s quality-built to give you many years of satisfactoryservice. It’s a “smart” thermostat that lets you save energy while still maintaining the standard of comfort you want in yourhome.

This Owner's Guide will show you how to get the most benefit from your new thermostat.

Programmable Multistage ThermostatOWNER’S GUIDE

Your new programmable thermostat is a precision instrument that’s quality-built to give you many years of satisfactoryservice. It’s a “smart” thermostat that lets you save energy while still maintaining the standard of comfort you want in yourhome.

This Owner's Guide will show you how to get the most benefit from your new thermostat.

Monitor thermostat operation, read currenttime and room temperature at a glance.

Check status light to see if thethermostat is on, even in the dark.

Set differentschedules forweekdays,Saturday, andSunday.

Choose manual orautomatic thermo-stat operation.

Program up to fourdifferent timeperiods in eachschedule.

Set the tempera-ture warmer orcooler at the touchof a key.

Bypass the storedprogram for asingle period.

Choose system andfan operatingmodes with thethermostatswitches (onsubbase).

Simple Four-Step ProgrammingOf course, you can use the schedule preprogrammed into your new thermostat (seeGlossary, page 35). But it’s an easy matter to program the thermostat to fit yourlifestyle.

1 Set the current time and day. See page 6.

2 Set the program schedule and heating temperatures. See page 7.

3 Set the cooling temperatures. See page 14.

4 Set the system and fan switches. See page 20.

Features

Adaptive Intelligent Recovery™ ........................... 1-4

Programming Your Thermostat .......................... 5-22Set the current day and time .................................. 6Set the program schedule and

heating temperatures ......................................... 7Set the cooling temperatures ................................ 14Set the system and fan switches on the subbase 20

Operating Your Thermostat ............................... 23-30Temporarily changing the program ...................... 23Permanently changing the program ..................... 25

Manually operating the thermostat ....................... 26Canceling the program settings ............................ 27Checking the program times and temperatures ... 28

Checking the current temperature setting ............ 29

Maintaining Your Thermostat ............................ 31-34Removing the thermostat ..................................... 31Replacing the thermostat ...................................... 32Replacing the batteries ......................................... 33

Power outages ...................................................... 34

Glossary ..............................................................35-36

Your Personal Program ..................................... 37-38

Troubleshooting Guide ...................................... 39-40

Chronotherm® III Thermostat Questions .........41-42

Quick Reference to the Keys .............................43-44

Index ..................................................................... 45-46

Limited One-Year Warranty .................................... 47

TABLE OF CONTENTS

i

CONDITIONED AIR

CONDITIONED AIR

RETURN AIRREGISTER

SUPPLY AIRREGISTER

STALE AIREXHAUST

FRESH AIR INTAKE

HONEYWELLHOME

VENTILATIONSYSTEM

HONEYWELL ELECTRONIC AIR CLEANER

HONEYWELL WATER FILTER

OPTIMALEFFICIENCYFORCED AIR

FURNACEFRESH AIR TOHOME

HUMIDIFIER

OPTIMALEFFICIENCY AIR

CONDITIONEROR HEAT PUMP

THECHRONOTHERM lll

THERMOSTAT IS ONE PART OF A PERFECT CLIMATE

SYSTEM, AN INDOOR ENVIRONMENT THAT PROVIDES TOTAL INDOOR COMFORT. IT MAKES

YOU FEEL BETTER; ALLOWS YOU TO LIVE AND WORK IN A MORE COMFORTABLE ENVIRONMENT; ACHIEVES MAXIMUM ENERGY SAVINGS AND MAINTAINS PRECISE

CONTROL OVER INDOOR TEMPERATURE AND HUMIDITY.

COLD AIRRETURN STALE

AIR FROMBATHS

®

®

M3755

How it works...

HONEYWELLDEHUMIDISTAT

HOMEVENTILATION

SYSTEMFRESH AIRCONTROL

HONEYWELLELECTRONICAIR CLEANER

PERFORMANCESTATUS

INDICATOR

HONEYWELLRESIDENTIAL

SECURITY SYSTEM

HONEYWELLCHRONOTHERM lllPROGRAMMABLE

THERMOSTAT

®

®

CONSIDER THE COMPLETEPACKAGE FOR A PERFECTCLIMATE® SYSTEM INYOUR HOME

ii

Honeywell manufactures the following components of a Perfect ClimateSystem:1. Honeywell Chronotherm® Programmable Thermostats2. Honeywell F50, the air cleaners of choice

3. Honeywell Dehumidistats4. Honeywell Home Ventilation Systems5. Honeywell F76 Water Filter

6. Honeywell Home Security Systems

iii

ADAPTIVE INTELLIGENTRECOVERY™—BREAKTHROUGHTECHNOLOGY SENSESTEMPERATURE MORE LIKE YOU DO

M168

1

ADAPTIVE INTELLIGENT RECOVERY™

The Chronotherm® III Thermostat isso smart, it’s almost human.

■ Your body perceives temperature from a variety of sources, not only fromthe air in the room, but also from your surroundings—walls, windows andfurnishings.

■ Human beings feel differences in temperature as slight as two degreesFahrenheit.

■ Common household thermometers and standard thermostats sense onlyair temperature, which may or may not reflect how hot or cold the roomactually feels to a human being.

■ The Chronotherm III Thermostat reads the temperature of the wall as wellas the air—and responds to temperature changes as little as one degreeFahrenheit—so room temperature is more likely to feel right to you andyour family.

2ADAPTIVE INTELLIGENTRECOVERY™

ADAPTIVE INTELLIGENT RECOVERY™

3

AMPM

SUN MON TUE WED THU FRI SAT COOL ON HEAT ONWAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED

REPL

BATSETPT

AMPM


REPL

BATSETPT

AMPM


REPL

BATSETPT

AMPM


REPL

BATSETPT

System Operatingin Energy Savings Mode

Recovery Begins Recovery Continues

System Operatingin Comfort Mode

ENERGYSAVINGSPERIOD

RECOVERY FROM ENERGY SAVINGSCOMFORTPERIOD

TIME

HE

AT

ING

TE

MP

ER

AT

UR

E

M3780

■ The Chronotherm III Thermostat is actually a small but powerfulcomputer. When calculating the exact time to turn on your furnace orair conditioner, it considers: (1) air temperature, (2) the temperature ofthe wall and (3) when you want the comfort temperature established.

THE CHRONOTHERM® IIITHERMOSTAT—THE OPTIMUMCOMFORT AND ENERGYSAVINGS SOLUTION

■ During Adaptive Intelligent Recovery™, the thermostat increases thecontrol temperature gradually and turns the equipment on and off severaltimes to save energy by avoiding overshooting the comfort temperature.You can see the current control temperature anytime during recovery bypressing the PRESENT SETTING key.

■ This “smart” control learns from experience. Each day it checks howclosely it hit the target and adjusts the recovery start time accordingly.

It typically takes four to eight days after installation for the Chronotherm IIIThermostat to adjust to the weather, your life style, home construction andheating/cooling system. The thermostat calculates the LEAVE/RETURNrecovery separately from the SLEEP/WAKE recovery.

PROGRAMMING YOUR THERMO-STAT

4

5

PROGRAMMING YOUR THERMOSTATIMPORTANT With Adaptive Intelligent Recovery™, program the times for when you want

your home comfortable. The thermostat will decide how early to begin thetemperature changes.

NOTE: Some models will show32° F instead of the currenttemperature, indicating thethermostat is operating onbackup batteries until thethermostat is mounted on thewallplate and the system ispowered.

PROGRAMMING YOURTHERMOSTAT

6

Press and release. The displayshows 1:00 PM MON.

Press and hold until the currentday appears in the display.

Press and hold until the currenttime appears in the display. Besure AM or PM appears asdesired.

You have programmed thecurrent day and time. Go on toStep 2.

STEP 1SET THE CURRENT DAYAND TIME

You can program this thermostat eitheron the wall or in your hand. SEE PAGE31 TO FIND OUT HOW TO REMOVETHE THERMOSTAT FROM THEWALL.

Always press the keys with yourfingertip or similar blunt tool. Sharpinstruments like a pen or pencil pointcan damage the keyboard.

NOTE: Check the glossary, page 35, fordefinitions of unfamiliar words.

MON

PM

M5015

SETPRESENTDAY/TIME

DAY

AHEAD

BACK

TUE

M5016

PM

TUE

PM

M5017

7

PROGRAMMING YOUR THERMOSTATSTEP 2SET THE PROGRAM SCHEDULEAND HEATING TEMPERATURES

Before You Begin…The schedule form on page 37 providesan opportunity to plan your schedule.

Now…Start by programming the WAKE timeand temperature for weekdays.

The thermostat requires a program forWAKE. You can program LEAVE,RETURN and SLEEP or not, as youplease.

Press and release. Note that the display

shows WAKE and thepreprogrammed time andtemperature.

If the display reads COOL, pressand release to switch to HEAT.

If display reads SAT or SUN,press and hold until MON TUEWED THU FRI appears.

Press and hold until the displayshows the desired starting time.

WAKE

SETHEAT/COOL

DAY

AHEAD

BACK

MON TUE WED THU FRI ON HEAT

WAKE

AM SETPT

M5018


WAKE

AM SETPT

M5018


WAKE

AM SETPT

M5018


WAKE

AM SETPT

M5019

8

Press and hold until thedisplay shows the desiredtemperature.

If the display starts to blinkwhile you are holding downTEMPERATURE WARMERor COOLER, you havereached the setting limit. Ifyour thermostat can switchautomatically betweenheating and cooling, theheating temperature must beat least three degrees belowthe air conditioning tempera-ture. For example, if thecooling setting is75° F, the maximum heatingsetting is 72° F.

WARMER

COOLER


WAKE

AM SETPT

M5020

9

PROGRAMMING YOUR THERMOSTATProgram the LEAVE time and tempera-ture, if desired.

NOTE: You can cancel the LEAVE,RETURN or SLEEP program byholding down the period key until thetime and temperature disappearfrom the display.

Press and release. The displayshows LEAVE, but no time ortemperature.


Press and hold until the displayshows the desired temperature.

LEAVEMON TUE WED THU FRI ON HEAT

LEAVE

SETPT

M5021

AHEAD

BACK


LEAVE

AM SETPT

M5022


LEAVE

AM SETPT

M5023

WARMER

COOLER

10

Program the RETURN time andtemperature, if desired.

Press and release. The displayshows RETURN, but no time ortemperature.



RETURN

AHEAD

BACK

WARMER

COOLER


RETURN

SETPT

M5024


RETURN

PMSETPT

M5025


RETURN

PMSETPT

M5026

PROGRAMMING YOUR THERMOSTATProgram the SLEEP time and tempera-ture, if desired.

Press and release. The displayshows SLEEP and thepreprogrammed time and tempera-ture.



SLEEPMON TUE WED THU FRI ON HEAT

SLEEP

PMSETPT

M5027

AHEAD

BACK

WARMER

COOLER


SLEEP

PMSETPT

M5060


SLEEP

PMSETPT

M5028

11

Set the SATURDAY schedule. Usethe same procedure as for weekdays.

Press and release until SATappears on the display.

Press WAKE, LEAVE, RETURNor SLEEP to select the timeperiod.

Use the AHEAD/BACK keys toset the time and the WARMER/COOLER keys to set thetemperature.

DAYSAT ON HEAT

SLEEP

PMSETPT

M5029

SLEEP

WAKE LEAVE

RETURN

WARMER

COOLER

AHEAD

BACK

12

PROGRAMMING YOUR THERMOSTATSet the SUNDAY schedule. Use thesame procedure as for weekdays.

Press and hold until SUN appearson the display.


Use the AHEAD/BACK keys toset the time and the WARMER/COOLER keys to set thetemperature.

You have completed setting theprogram schedule and heatingtemperatures. To set air condi-tioning, go to Step 3.

DAYSUN ON HEAT

SLEEP

PMSETPT

M5030

LEAVE

RETURNSLEEP

WAKE

AHEAD

BACK

WARMER

COOLER

If you do not want to program cooling temperatures,skip Step 3 and press the RUN PROGRAM key. 13

STEP 3SET THE COOLINGTEMPERATURES

The program times are the same forboth heating and cooling. Only thecooling temperatures need to beprogrammed if you have alreadyprogrammed for heating. To set timesas you program the cooling tempera-tures, use the TIME AHEAD and BACKkeys as described in Step 2. But if youchange times for cooling, you are alsochanging them for heating!

First program the WAKE temperaturefor weekdays.

Press and release. The displayshows WAKE and the time andtemperature you programmed forheating.

Press and release so COOLshows on the display, along withthe preprogrammed coolingtemperature.

If display reads SAT or SUN,press and hold until MON TUEWED THU FRI appears.

WAKESUN ON HEAT

WAKE

AM SETPT

M5031

SETHEAT/COOL

SUN COOL

WAKE

AM SETPT

M5032

MON TUE WED THU FRI COOL

WAKE

AM SETPT

M5033

DAY

14

PROGRAMMING YOUR THERMOSTATPress and hold until the displayshows the desired temperature.

If the display blinks while you holddown TEMPERATUREWARMER or COOLER, you havereached the setting limit. If yourthermostat can switch automati-cally between heating andcooling, the cooling temperaturemust be at least three degreeshigher than the correspondingheating temperature. Forexample, if the heating setting is70° F, the minimum coolingsetting is 73° F. If you desire alower cooling temperature, theheating temperature first must belowered accordingly.

WARMER

COOLER


WAKE

AM SETPT

M5034

15

Program the LEAVE temperature, ifdesired. LEAVE

Press and release. The displayshows LEAVE, the time pro-grammed for heating, and 78° F.

Press and hold until the displayshows the desired temperature.WARMER

COOLER

Press and release. The displayshows RETURN, the timeprogrammed for heating, and78° F.


RETURNProgram the RETURN temperature, ifdesired.

WARMER

COOLER


LEAVE

AM SETPT

M5035


LEAVE

AM SETPT

M5036


RETURN

PMSETPT

M5037


RETURN

PMSETPT

M5038

16

PROGRAMMING YOUR THERMOSTATProgram the SLEEP tempera-ture, if desired.

Press and release.


SLEEPMON TUE WED THU FRI COOL

SLEEP

PMSETPT

M5039


SLEEP

PMSETPT

M5040

WARMER

COOLER

SAT COOL

SLEEP

PMSETPT

M5041

Set the cooling temperatures for theSATURDAY schedule. Use the sameprocedure as for weekdays.

Press and hold until SAT appearson the display.


DAY

LEAVE

RETURNSLEEP

WAKE

17

Use the WARMER/COOLER keys toset the temperature.

Set the cooling temperatures for theSUNDAY schedule. Use the sameprocedure as for weekdays.

Press and hold until SUN appearson the display.


WARMER

COOLER

DAY

SLEEP

WAKE

SUN COOL

SLEEP

PMSETPT

M5042

LEAVE

RETURN

18

PROGRAMMING YOUR THERMOSTATUse the WARMER/COOLERkeys to set the temperature.

You have completed program-ming the cooling temperatures.

Press and release to start theprogram.

Go to Step 4.

WARMER

COOLER

RUNPROGRAM

TUE

LEAVE

PMSETPT

M5043

19

STEP 4SET THE SYSTEM AND FANSWITCHES ON THE SUBBASE.

Depending on thermostat model, someof the switch positions shown may notbe available to you. Note the positionsprovided on your subbase, then set theswitch(es) as desired.

First set the fan switch.

FAN ON: The fan runs continu-ously. Use for improved aircirculation during special occa-sions or for more efficientelectronic air cleaning.

FAN AUTO: Normal setting formost homes. The fan goes onand off with the air conditioner insummer. In winter, the fan onmost systems starts a fewminutes after the furnace comeson. It stops a few minutes afterthe furnace goes off. The fanstarts and stops with the furnacein some electric heat systems andwith the compressor in heat pumpsystems.

ON

AUTOON

M3763

AUTO

FAN

FAN

20

PROGRAMMING YOUR THERMOSTATHEAT: The thermostat controlsyour heating system.

AUTO (select models only): Thethermostat controls either yourheating or cooling system,depending on room temperature.

COOL: The thermostat controlsyour cooling system.

OFF: Both the heating andcooling systems are off.

AUTOHEAT OFFCOOL

HEAT OFFCOOLAUTO

HEAT OFFCOOLAUTO

M3762

HEAT OFFCOOLAUTONow, while you enjoy precision tem-perature control, read on to learn aboutthe operating flexibility that makes thisthermostat THE SMART CHOICE.

You have finished programmingyour thermostat.

If you removed it from the wall to program,replace it following the procedure on page 32. 21

Then set the system switch.

22

OPERATING YOUR THERMOSTAT

TEMPORARILY CHANGING THEPROGRAM

These features let you customize theprogram for those times when someonecomes home early, or you’re staying uplate, or you plan to be out for theevening.

To keep the current temperaturethrough the next program period:

Press and release. The name ofthe period to be skipped will flashin the display until the nextregularly scheduled period starts.

To go back to the temperature of theprevious program period:

Press and release. The displaywill show the name of theprevious period and flashTEMPORARY until the nextregularly scheduled period starts.

SKIPNEXT

PERIOD

CHANGETO LASTPERIOD

TUE

LEAVE RETURN

PM

M5044

TUE

WAKE TEMPORARY

PM

M5045

23

To temporarily raise or lower thetemperature for the current period only:

Press and hold until the desiredtemperature is reached. Thedisplay will flash TEMPORARYuntil the next programmed timeperiod starts.

If you change your mind: Press and release to cancel anyof the temporary settings.

WARMER

COOLER

RUNPROGRAM

24OPERATING YOURTHERMOSTAT

TEMPORARY

M5046

ON HEAT

TUE

LEAVE

PM

M5047

OPERATING YOUR THERMOSTATPERMANENTLY CHANGING THEPROGRAM

If your schedule changes or you want adifferent temperature, you can updateany setting without affecting otherprogram settings.

Press and release the desiredperiod key.

Press and hold until the desiredday schedule shows on thedisplay.

Press and hold the Time orTemperature keys until thedisplay shows the desired newprogram.

Press and release to return tonormal operation.

SLEEP

WAKE

DAY

AHEAD

BACK

RUNPROGRAM

LEAVE

RETURN

WARMER

COOLER

25

MANUALLY OPERATING THETHERMOSTAT

This feature is particularly useful whenyou go on vacation or other extendedabsences. It does not cancel yourprogram.

Press and release.

Press and hold to change thetemperature setting. After a fewseconds, the display will show thecurrent temperature.

Press and release to check thetemperature setting.

Press and release to cancel hold.

NOTE: Moving the system switchalso cancels hold.

HOLDTEMP

WARMER

COOLER

PRESENTSETTING

RUNPROGRAM

ON HEAT

SETPT

M5048

ON HEAT

SETPT

M5049

ON HEAT

SETPT

M5050

TUE

LEAVE

PM

M5051

26

OPERATING YOUR THERMOSTATCANCELING THE PROGRAMSETTINGS

The thermostat requires time andtemperature settings in the WAKEperiod, but any of the others can becanceled. Weekday, Saturday andSunday settings are canceled sepa-rately.

Press and hold the desired periodkey until the time and tempera-ture clear from the display (aboutthree seconds).


SLEEP

LEAVE

RETURN

RUNPROGRAM


LEAVE

M5052

MON

RETURN

PM

M5053

27

CHECKING THE PROGRAM TIMESAND TEMPERATURES

You can check all the stored settingswithout affecting the permanentprogram.

Press and release the desiredperiod key. The start time andtemperature setting will appear onthe display.

Press and release to display thenext daily time and temperaturefor that period.


SLEEP

WAKE

LEAVE

RETURN

DAY

RUNPROGRAM


SLEEP

PMSETPT

M5054

SAT ON HEAT

SLEEP

PMSETPT

M5055

MON

M5056

RETURN

PM

28

OPERATING YOUR THERMOSTATCHECKING THE CURRENTTEMPERATURE SETTING

Press a single key to compare currentroom temperature to the currenttemperature setting at any time.

Press and release. The displaywill show the current temperaturesetting for several seconds, thenrevert to the room temperature.

During recovery from energysavings, the setting displayed willnot match the programmedsetting. This is because thethermostat gradually changes thetemperature setting duringrecovery to provide most efficientuse of the heating or coolingequipment.

PRESENTSETTING

ON HEAT

SETPT

M5057

29

30

MAINTAINING YOUR THERMOSTATREMOVING THE THERMOSTAT

1 Loosen the two captive screws atthe bottom corners of the case.

2 Pull out the thermostat from thebottom.

3 Lift the thermostat up and off thesubbase.

HEATCOOL OFF

ON AUTO

FAN

M3760

AUTO

HEATOFF

COOL

ON AUTO

FAN

M3761

AUTO

31

PM

MORNIMGMON

HEAT ONROOM

SYSTEM

M3758

RUNPROGRAM

TIME

TEMPERATURE

PRESENTSETTING

SKIPNEXT

PERIOD

CHANGETO LASTPERIOD

SETPRESENTDAY/TIME

HOLDTEMP

WAKE

SLEEP RETURN

AHEAD WARMER

BACK COOLER

LEAVE

PERIOD

DAY

SETHEAT/COOL

REPLACING THE THERMOSTAT

1 Hang the thermostat on the tabsat the top of the subbase.

2 Swing down and press on thelower edge until the thermostatsnaps into place.

3 Tighten the captive screws.

32MAINTAINING YOURTHERMOSTAT

HEAT AUTO COOL OFF

ON AUTO

FAN

M3759

M3757

PMRETURN

MONHEAT ON

SYSTEM

AUTO

PM

MORNIMGMON

HEAT ONROOM

SYSTEM

M3756

RUNPROGRAM

TIME

TEMPERATURE

PRESENTSETTING

SKIPNEXT

PERIOD

CHANGETO LASTPERIOD

SETPRESENTDAY/TIME

HOLDTEMP

AHEAD WARMER

BACK COOLER

PERIOD

WAKE

SLEEP RETURN

LEAVEDAY

SETHEAT/COOL

MAINTAINING YOUR THERMOSTATREPLACING THE BATTERIES

Your thermostat uses three AAAalkaline batteries. We recommendEnergizer® batteries. The display willflash REPL BAT when the batteriesget low. Unless the display is blank(indicating the batteries are dead)when you start, you will not have toreprogram the thermostat if youinsert the new batteries within 20-30seconds of taking out the old ones.

To replace:■ Set the system switch to OFF.■ Remove the thermostat from the

wall. See page 31.■ Lift the batteries out of the holder.■ Insert the new batteries, making

sure the positive (+) terminals allface toward the right.

■ Replace the thermostat on thewall. See page 32.

■ Reprogram, if necessary.

M1915

33

POWER OUTAGES

Backup batteries will hold theprogramming and keep the displayon during most power outages. Oncethe power is restored, the system willresume normal operation.

If the display goes off when power islost, either the backup batteries needto be replaced or are not installed.When power is restored, the displaywill flash 1:00 PM to remind you toreprogram.

34

GLOSSARYPreprogrammed scheduleThis is the schedule programmedinto your thermostat at the factory. Itsets a night program that providesenergy savings if you don’t set yourown program, or if your personalprogram is lost for any reason. Theprogram, which is the same for alldays of the week, is:

Start TemperaturePeriod Time Heating CoolingWAKE 6:00 AM 70° F 78° FLEAVE --------- No program -------------------------RETURN --------- No program -------------------------SLEEP 10:00 PM 60° F 78° F

ProgramThe times and temperatures you setto define the comfort and energysavings periods for each schedule(weekdays, Saturday, Sunday).

RecoveryThe time when the thermostat

Adaptive Intelligent Recovery™See pages 1-4.

Comfort temperatureThe temperature you want in themorning and evening when you’rehome.

Energy-saving temperatureThe lower (heating) or higher(cooling) temperature that lets yousave on heating and cooling costswhen you’re asleep or away. Alsocalled the setback (heating) or setup(cooling) temperature.

Period keyOne of the four keys—WAKE,LEAVE, RETURN or SLEEP—thatyou press to check or program thestart time and temperature for a timeperiod.

operates the heating or coolingequipment to return the house fromthe energy savings temperature tothe comfort temperature. Thethermostat starts the recovery periodearly so the house will be at thecomfort setting by the time you’vechosen.

Saturday program scheduleThe schedule of WAKE, LEAVE,RETURN and SLEEP period starttimes and temperatures that youprogram to run on Saturdays.

SetbackReducing the temperature in thehouse for a set period every day inwinter for energy savings. The lowertemperature is the energy savingstemperature.

35

SetupRaising the temperature in the housefor a set period every day in summerfor energy savings. The highertemperature is the energy savingstemperature.

Set pointThe temperature you set on thethermostat. The thermostat turns theheating or cooling equipment on andoff to maintain this temperature atthe thermostat location until anothertemperature setting goes into effect.

Sunday program scheduleThe schedule of WAKE, LEAVE,RETURN and SLEEP period starttimes and temperatures that youprogram to run on Sundays.

SYSTEM light (yellow)This light (located on thermostat)glows whenever the thermostat iscalling for heating or cooling.

Time periodOne of four program periods:WAKE, LEAVE, RETURN andSLEEP available with the thermo-stat. One period begins when theprevious period ends.

WAKE—The time period whenyou want the house at a comfort-able temperature while the familygets up and gets ready to leavefor work or school. This is theonly period that must contain atime and temperature.LEAVE—The time period whenyou can set back (winter) or setup (summer) the temperature forenergy savings because thefamily is usually away from home.

RETURN—The time period whenyou want the house at a comfort-able temperature for familyactivities in the evening beforebedtime.SLEEP—The time period whenyou can set back (winter) or setup (summer) the temperature forenergy savings because thefamily is sleeping. Set it to start atyour family’s normal bedtime.Often the SLEEP program is setonly for the heating season sofamily members can sleep cool insummer.

Weekday program scheduleThe schedule of WAKE, LEAVE,RETURN and SLEEP period starttimes and temperatures that youprogram to run Monday throughFriday.

36GLOSSARY

You can use the tables below to plan your schedule before you begin programming. If you choose not to program adaytime energy savings period, leave the LEAVE and RETURN periods blank.

Weekday ProgramSTART HEATING COOLING

PERIOD TIME TEMPERATURE TEMPERATUREWAKELEAVERETURN

SLEEP

Saturday ProgramSTART HEATING COOLING

PERIOD TIME TEMPERATURE TEMPERATUREWAKE

LEAVERETURNSLEEP

YOUR PERSONAL PROGRAM

37

Sunday ProgramSTART HEATING COOLING

PERIOD TIME TEMPERATURE TEMPERATUREWAKELEAVERETURN

SLEEP

38YOUR PERSONALPROGRAM

IF… THEN…Display will not come on. ■ Check that heat or cool system power is on. If you use batteries, replace

with fresh ones.

■ Make sure thermostat is correctly mounted on the subbase.Display flashes during programming. ■ You have reached the temperature setting limit. The setting range is 45°

F to 88° F. In models with automatic heat-cool changeover, the COOLtemperature setting must be at least 3° F above the HEAT temperaturesetting.

Display flashes during operation. ■ Programming has been lost because of a power outage. You mustreprogram.

Program is lost due to power outage. ■ Check that backup batteries are installed correctly. Replace whennecessary. Reprogram the thermostat.

Temperature change occurs at the ■ Check the program times for the period in question. Be sure that AMwrong times. and PM indications are correct. Make sure the current day and time are

correct. Reprogram when necessary.

■ Remember that the heating system or cooling system comes on beforethe WAKE and RETURN start times so the house will be at the desiredtemperature when the period starts.

TROUBLESHOOTING GUIDE

39

Heating will not come on. ■ Check the fuse or circuit breaker and replace or reset when necessary.

■ Check that the switch on the thermostat is set to HEAT or AUTO.Heating will not come on. (con't) ■ If temperature setting is higher than current temperature, and display

says HEAT ON or SYSTEM light is on, contact your heating and airconditioning contractor.

Cooling will not come on. ■ Check the fuse or circuit breaker and replace or reset when necessary.■ Check that switch on thermostat is set to COOL or AUTO.

■ The thermostat has a built-in time delay, which may add to time delays inthe cooling equipment. Allow up to ten minutes after changing the settingbefore the compressor starts.

■ If temperature setting is lower than current temperature, and displaysays COOL ON or SYSTEM light is on, contact your heating and airconditioning contractor.

The house is too warm or too cool. ■ Press PRESENT SETTING to check the current temperature setting.■ If desired, change the time or temperature setting. See page 25.

Display says HEAT ON or SYSTEM ■ Allow time for the heating equipment to heat up before checking forlight is on, but no heat is coming heat at the register.from the registers.Display flashes REPL BAT or goes ■ Install fresh AAA alkaline batteries. We recommend Energizer®blank when power is turned off. batteries. (See page 33.)

40TROUBLESHOOTINGGUIDE

1. The temperature displayed onthe Chronotherm III Thermo-stat doesn’t always match theroom temperature on anotherthermostat located right nextto it. Why?

CHRONOTHERM III THERMOSTAT QUESTIONSFirst, the Chronotherm III Thermostat is a very accurate instrument designed tosense both air temperature and wall temperature, like your body does. It givesan average reading over a period of time. Second, it is self-adjusting, and willtake a few days after installation to adapt to your home.

2. Can I control when thefurnace comes on in themorning?

With Adaptive Intelligent Recovery™, the thermostat will turn on the furnace asearly as necessary to reach your desired comfort temperature at the pro-grammed time. The earliest it will be is 24 minutes per degree setback ahead ofyour WAKE time, but it will vary depending on your system, the weather andhow much the temperature dropped in your house during the night.

If it is so cold outside that your house drops to your sleep temperature, thefurnace will turn on and off at night to control the temperature at that setting.

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It bypasses all program settings and holds the temperature at the presentsetting. To increase or decrease the temperature while on HOLD, use theWARMER-COOLER keys. Touching RUN PROGRAM will return thedevice to programmed operations.

3. What does the HOLD key do?

5. How can this thermostat saveenergy when it comes on andoff so many times early in themorning hours?

Two ways. First, it saves energy (and money) by setting back the temperaturefor blocks of time during the day or night. Second, it conserves energy byrecovering gradually to the desired temperature. This prevents overshootingyour comfort set point (and wasting energy) or undershooting the comfort setpoint (and forcing you to change the thermostat setting, also wasting energy).

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4. How long does the HOLD keyhold?

Forever! The HOLD key will hold the temperature indefinitely. The only way torelease it is to push the RUN PROGRAM key or change the system switchpositions if applicable.

6. Why don’t all thermostatmodels have AUTO (auto-matic) changeover fromheating to cooling?

Most parts of the country don’t have wide temperature swings during a 24-hourperiod, so it is not necessary. Desert climates, such as Phoenix, are theexception because of wide variations in temperature that may require both theair conditioner and furnace to run during different times within a given 24-hourperiod.

7. Sometimes my ChronothermIII Thermostat doesn’t allowthe house temperature todrop to my SLEEP settingbefore it starts bringing thefurnace on. Why?

When you start your SLEEP period, the thermostat will turn off your furnace andyour house temperature will start to fall. After that, the thermostat does nothinguntil the house temperature falls all the way to your SLEEP temperature settingor until recovery starts.

In mild weather or with good insulation, your house temperature may not fall allthe way to your SLEEP temperature setting and the thermostat won’t turn onyour furnace until the time to recover back up to your comfort setting.

CHRONOTHERM IIITHERMOSTAT QUESTIONS

QUICK REFERENCE TO THE KEYSPress these keys to: Begin the current day or time

programming.

Set the day of the week andselect the program day duringprogramming.

Select the time period toprogram or review.

Switch between heat and coolmodes during programming orwhen reviewing the program.

Set the time ahead and back.Hold either key down to changethe setting faster.

SETPRESENTDAY/TIME

DAY

LEAVE

RETURNSLEEP

WAKE

SETHEAT/COOL

AHEAD

BACK

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Set the temperature while programming andtemporarily change the temperature duringoperation. Hold down either key to change thesetting faster.

Hold any temperature you desire for an ex-tended period.

Change the temperature to the set point of theprevious period.

Maintain the current temperature through thenext program period.

Start your programmed schedule; canceltemporary program changes.

See the current temperature setting. Settingmay not match programmed setting duringrecovery from energy savings.

WARMER

COOLER

44QUICK REFERENCE TOTHE KEYS

PRESENTSETTING

RUNPROGRAM

SKIPNEXT

PERIOD

CHANGETO LASTPERIOD

HOLDTEMP

INDEXBatteries, replacement ............... 33Blinking display ........................... 39

Canceling programs ................... 27Change temperature ................... 23Checking present setting ............ 29Checking programs .................... 28Clock display ............................... *5Cooling temperatures ................. 14

Day ................................................ 6Display ........................................ *6

Energy-saving temperature ........ 35

Fan switch ................................... 20Features ........................................ *Flashing display .......................... 39

Glossary ...................................... 35

Heating temperatures ................... 7Hold temperature ..................26, 41

Keys ............................................ 43

LEAVE ........................................ 36Light .......................................... *36

Maintenance ............................... 31Manual operation ........................ 26

Operation .................................... 23

Period keys ................................. 43Personal program ....................... 37Power outage .............................. 34Preprogrammed schedule .......... 35Present setting ............................ 26Program schedule ...................... 27Programming overview ................. *Programming steps ...................... 6

Quick reference to the keys ........ 43

RETURN ...............................36, 43Removing thermostat ................. 31Replacing batteries ..................... 33Replacing thermostat .................. 32

SLEEP ...................................30,35Saturday program .......... 12, 35, 37Set cooling temperatures ........... 14Set current day ............................. 6Set current time ............................ 6Set fan switch ............................. 20Set heating temperatures ............. 7Set program schedule .................. 7Set system switch ....................... 21Setback ....................................... 35Setting limits ............................ 8,10Setup ........................................... 36Skip ............................................. 23

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Sunday program ...... 13, 18, 36, 38Switch, fan .................................. 20Switch, system ............................ 21System light ................................ 35System switch ............................. 21

Table of Contents .......................... iTemporary program changes ..... 23Time .............................................. 6Time period ................................. 36Troubleshooting .......................... 39

WAKE ...................................36, 43Weekday program ..... 7, 14, 36, 37

*See the product features inside the front cover.

46INDEX

LIMITED ONE-YEAR WARRANTYHoneywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) yearfrom the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (atHoneywell’s option) within a reasonable period of time.

If the product is defective,(i) return it with a bill of sale or other dated proof of purchase, to the dealer or contractor 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 Inc.Return Goods Department1050 Berkshire LanePlymouth, MN 55441-4401

This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused bydamage which occurred while the product was in the possession of a consumer.

Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS ORDAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH OF ANYWARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation of incidental or consequentialdamages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDINGTHE WARRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURATION OF THISWARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

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

If you have any questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc., P.O. Box 524, MN27-2164, Minneapolis, MN 55440-0524 or call toll-free at 1-800-468-1502, Monday-Friday, 7:00 a.m. - 5:30 p.m. Central time.

47LIMITED ONE-YEARWARRANTY

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Monitor thermostat operation, read currenttime and room temperature at a glance.

Check status light to see if thethermostat is on, even in the dark.

Set differentschedules forweekdays,Saturday, andSunday.

Choose manual orautomatic thermo-stat operation.

Program up to fourdifferent timeperiods in eachschedule.

Set the tempera-ture warmer orcooler at the touchof a key.

Bypass the storedprogram for asingle period.

Choose system andfan operatingmodes with thethermostatswitches (onsubbase).

Simple Four-Step ProgrammingOf course, you can use the schedule preprogrammed into your new thermostat (seeGlossary, page 35). But it’s an easy matter to program the thermostat to fit yourlifestyle.

1 Set the current time and day. See page 6.

2 Set the program schedule and heating temperatures. See page 7.

3 Set the cooling temperatures. See page 14.

4 Set the system and fan switches. See page 20.

Features

Home and Building Control Home and Building Control Helping You Control Your WorldHoneywell Inc. Honeywell Limited—Honeywell Limitée1985 Douglas Drive North 740 Ellesmere RoadGolden Valley, MN 55422 Scarborough, Ontario

M1P 2V9

C.H. • Printed in Taiwan R.O.C. • Form Number 69-0743 • 7/93

QUALITY ISKEY

69-0743 - Programmable Multistage Thermostat · so smart, it’s almost human. Your body perceives temperature from a variety of sources, not only from the air in the room, but also

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