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Honeywell Chronotherm III, Owner'S Manual, Page: 45 / 57

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Honeywell Chronotherm III Owner'S Manual Download Page 45

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 COOL

temperature setting must be at least 3

°

 F above the HEAT temperature

setting.

Display flashes during operation.

■

Programming has been lost because of a power outage. You must
reprogram.

Program is lost due to power outage.

■

Check that backup batteries are installed correctly. Replace when
necessary. Reprogram the thermostat.

Temperature change occurs at the

■

Check the program times for the period in question. Be sure that AM

wrong 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 

before

the WAKE and RETURN start times so the house will be at the desired
temperature when the period starts.

TROUBLESHOOTING GUIDE

39

Summary of Contents for Chronotherm III

Page 1: ...cision instrument that s quality built to give you many years of satisfactory service It s a smart thermostat that lets you save energy while still maintaining the standard of comfort you want in your home This Owner s Guide will show you how to get the most benefit from your new thermostat ...

Page 2: ...cision instrument that s quality built to give you many years of satisfactory service It s a smart thermostat that lets you save energy while still maintaining the standard of comfort you want in your home This Owner s Guide will show you how to get the most benefit from your new thermostat ...

Page 3: ...ler at the touch of a key Bypass the stored program for a single period Choose system and fan operating modes with the thermostat switches on subbase Simple Four Step Programming Of course you can use the schedule preprogrammed into your new thermostat see Glossary page 35 But it s an easy matter to program the thermostat to fit your lifestyle 1 Set the current time and day See page 6 2 Set the pr...

Page 4: ...g the program 25 Manually operating the thermostat 26 Canceling the program settings 27 Checking the program times and temperatures 28 Checking the current temperature setting 29 Maintaining Your Thermostat 31 34 Removing the thermostat 31 Replacing the thermostat 32 Replacing the batteries 33 Power outages 34 Glossary 35 36 Your Personal Program 37 38 Troubleshooting Guide 39 40 Chronotherm III T...

Page 5: ... 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 AIR RETURN STALE AIR FROM BATHS M3755 How it works HONEYWELL DEHUMIDISTAT HOME VENTILATION SYSTEM FRESH AIR CONTROL HONEYWELL ELECTRONIC AIR CLEANER PERFO...

Page 6: ...of a Perfect Climate System 1 Honeywell Chronotherm Programmable Thermostats 2 Honeywell F50 the air cleaners of choice 3 Honeywell Dehumidistats 4 Honeywell Home Ventilation Systems 5 Honeywell F76 Water Filter 6 Honeywell Home Security Systems iii ...

Page 7: ...ADAPTIVE INTELLIGENT RECOVERY BREAKTHROUGH TECHNOLOGY SENSES TEMPERATURE MORE LIKE YOU DO M168 1 ADAPTIVE INTELLIGENT RECOVERY ...

Page 8: ...as slight as two degrees Fahrenheit Common household thermometers and standard thermostats sense only air temperature which may or may not reflect how hot or cold the room actually feels to a human being The Chronotherm III Thermostat reads the temperature of the wall as well as the air and responds to temperature changes as little as one degree Fahrenheit so room temperature is more likely to fee...

Page 9: ...T ON WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED REPL BAT SET PT System Operating in Energy Savings Mode Recovery Begins Recovery Continues System Operating in Comfort Mode ENERGY SAVINGS PERIOD RECOVERY FROM ENERGY SAVINGS COMFORT PERIOD TIME HEATING TEMPERATURE M3780 The Chronotherm III Thermostat is actually a small but powerful computer When calculating the exact time to turn on your furnace...

Page 10: ...y by pressing the PRESENT SETTING key This smart control learns from experience Each day it checks how closely it hit the target and adjusts the recovery start time accordingly It typically takes four to eight days after installation for the Chronotherm III Thermostat to adjust to the weather your life style home construction and heating cooling system The thermostat calculates the LEAVE RETURN re...

Page 11: ... you want your home comfortable The thermostat will decide how early to begin the temperature changes NOTE Some models will show 32 F instead of the current temperature indicating the thermostat is operating on backup batteries until the thermostat is mounted on the wallplate and the system is powered ...

Page 12: ... and time Go on to Step 2 STEP 1 SET THE CURRENT DAY AND TIME You can program this thermostat either on the wall or in your hand SEE PAGE 31 TO FIND OUT HOW TO REMOVE THE THERMOSTAT FROM THE WALL Always press the keys with your fingertip or similar blunt tool Sharp instruments like a pen or pencil point can damage the keyboard NOTE Check the glossary page 35 for definitions of unfamiliar words MON...

Page 13: ... you please Press and release Note that the display shows WAKE and the preprogrammed time and temperature If the display reads COOL press and release to switch to HEAT If display reads SAT or SUN press and hold until MON TUE WED THU FRI appears Press and hold until the display shows the desired starting time WAKE SET HEAT COOL DAY AHEAD BACK MON TUE WED THU FRI ON HEAT WAKE AM SET PT M5018 MON TUE...

Page 14: ...OLER you have reached the setting limit If your thermostat can switch automatically between heating and cooling the heating temperature must be at least three degrees below the air conditioning tempera ture For example if the cooling setting is 75 F the maximum heating setting is 72 F WARMER COOLER MON TUE WED THU FRI ON HEAT WAKE AM SET PT M5020 ...

Page 15: ...isappear from the display Press and release The display shows LEAVE but no time or temperature Press and hold until the display shows the desired starting time Press and hold until the display shows the desired temperature LEAVE MON TUE WED THU FRI ON HEAT LEAVE SET PT M5021 AHEAD BACK MON TUE WED THU FRI ON HEAT LEAVE AM SET PT M5022 MON TUE WED THU FRI ON HEAT LEAVE AM SET PT M5023 WARMER COOLER...

Page 16: ...erature Press and hold until the display shows the desired starting time Press and hold until the display shows the desired temperature RETURN AHEAD BACK WARMER COOLER MON TUE WED THU FRI ON HEAT RETURN SET PT M5024 MON TUE WED THU FRI ON HEAT RETURN PM SET PT M5025 MON TUE WED THU FRI ON HEAT RETURN PM SET PT M5026 ...

Page 17: ...ammed time and tempera ture Press and hold until the display shows the desired starting time Press and hold until the display shows the desired temperature SLEEP MON TUE WED THU FRI ON HEAT SLEEP PM SET PT M5027 AHEAD BACK WARMER COOLER MON TUE WED THU FRI ON HEAT SLEEP PM SET PT M5060 MON TUE WED THU FRI ON HEAT SLEEP PM SET PT M5028 11 ...

Page 18: ...elease until SAT appears on the display Press WAKE LEAVE RETURN or SLEEP to select the time period Use the AHEAD BACK keys to set the time and the WARMER COOLER keys to set the temperature DAY SAT ON HEAT SLEEP PM SET PT M5029 SLEEP WAKE LEAVE RETURN WARMER COOLER AHEAD BACK 12 ...

Page 19: ... period Use the AHEAD BACK keys to set the time and the WARMER COOLER keys to set the temperature You have completed setting the program schedule and heating temperatures To set air condi tioning go to Step 3 DAY SUN ON HEAT SLEEP PM SET PT M5030 LEAVE RETURN SLEEP WAKE AHEAD BACK WARMER COOLER If you do not want to program cooling temperatures skip Step 3 and press the RUN PROGRAM key 13 ...

Page 20: ...hange times for cooling you are also changing them for heating First program the WAKE temperature for weekdays Press and release The display shows WAKE and the time and temperature you programmed for heating Press and release so COOL shows on the display along with the preprogrammed cooling temperature If display reads SAT or SUN press and hold until MON TUE WED THU FRI appears WAKE SUN ON HEAT WA...

Page 21: ...ermostat can switch automati cally between heating and cooling the cooling temperature must be at least three degrees higher than the corresponding heating temperature For example if the heating setting is 70 F the minimum cooling setting is 73 F If you desire a lower cooling temperature the heating temperature first must be lowered accordingly WARMER COOLER MON TUE WED THU FRI COOL WAKE AM SET PT...

Page 22: ...LER Press and release The display shows RETURN the time programmed for heating and 78 F Press and hold until the display shows the desired temperature RETURN Program the RETURN temperature if desired WARMER COOLER MON TUE WED THU FRI COOL LEAVE AM SET PT M5035 MON TUE WED THU FRI COOL LEAVE AM SET PT M5036 MON TUE WED THU FRI COOL RETURN PM SET PT M5037 MON TUE WED THU FRI COOL RETURN PM SET PT M5...

Page 23: ...E WED THU FRI COOL SLEEP PM SET PT M5039 MON TUE WED THU FRI COOL SLEEP PM SET PT M5040 WARMER COOLER SAT COOL SLEEP PM SET PT M5041 Set the cooling temperatures for the SATURDAY schedule Use the same procedure as for weekdays Press and hold until SAT appears on the display Press WAKE LEAVE RETURN or SLEEP to select the time period DAY LEAVE RETURN SLEEP WAKE 17 ...

Page 24: ...ling temperatures for the SUNDAY schedule Use the same procedure as for weekdays Press and hold until SUN appears on the display Press WAKE LEAVE RETURN or SLEEP to select the time period WARMER COOLER DAY SLEEP WAKE SUN COOL SLEEP PM SET PT M5042 LEAVE RETURN 18 ...

Page 25: ...RMOSTAT Use the WARMER COOLER keys to set the temperature You have completed program ming the cooling temperatures Press and release to start the program Go to Step 4 WARMER COOLER RUN PROGRAM TUE LEAVE PM SET PT M5043 19 ...

Page 26: ... Use for improved air circulation during special occa sions or for more efficient electronic air cleaning FAN AUTO Normal setting for most homes The fan goes on and off with the air conditioner in summer In winter the fan on most systems starts a few minutes after the furnace comes on It stops a few minutes after the furnace goes off The fan starts and stops with the furnace in some electric heat ...

Page 27: ...m OFF Both the heating and cooling systems are off AUTO HEAT OFF COOL HEAT OFF COOL AUTO HEAT OFF COOL AUTO M3762 HEAT OFF COOL AUTO Now while you enjoy precision tem perature control read on to learn about the operating flexibility that makes this thermostat THE SMART CHOICE You have finished programming your thermostat If you removed it from the wall to program replace it following the procedure...

Page 28: ...22 ...

Page 29: ...h the next program period Press and release The name of the period to be skipped will flash in the display until the next regularly scheduled period starts To go back to the temperature of the previous program period Press and release The display will show the name of the previous period and flash TEMPORARY until the next regularly scheduled period starts SKIP NEXT PERIOD CHANGE TO LAST PERIOD TUE...

Page 30: ...l the desired temperature is reached The display will flash TEMPORARY until the next programmed time period starts If you change your mind Press and release to cancel any of the temporary settings WARMER COOLER RUN PROGRAM 24 OPERATING YOUR THERMOSTAT TEMPORARY M5046 ON HEAT TUE LEAVE PM M5047 ...

Page 31: ...out affecting other program settings Press and release the desired period key Press and hold until the desired day schedule shows on the display Press and hold the Time or Temperature keys until the display shows the desired new program Press and release to return to normal operation SLEEP WAKE DAY AHEAD BACK RUN PROGRAM LEAVE RETURN WARMER COOLER 25 ...

Page 32: ... and hold to change the temperature setting After a few seconds the display will show the current temperature Press and release to check the temperature setting Press and release to cancel hold NOTE Moving the system switch also cancels hold HOLD TEMP WARMER COOLER PRESENT SETTING RUN PROGRAM ON HEAT SET PT M5048 ON HEAT SET PT M5049 ON HEAT SET PT M5050 TUE LEAVE PM M5051 26 ...

Page 33: ...the others can be canceled Weekday Saturday and Sunday settings are canceled sepa rately Press and hold the desired period key until the time and tempera ture clear from the display about three seconds Press and release to return to normal operation SLEEP LEAVE RETURN RUN PROGRAM MON TUE WED THU FRI ON HEAT LEAVE M5052 MON RETURN PM M5053 27 ...

Page 34: ... period key The start time and temperature setting will appear on the display Press and release to display the next daily time and temperature for that period Press and release to return to normal operation SLEEP WAKE LEAVE RETURN DAY RUN PROGRAM MON TUE WED THU FRI ON HEAT SLEEP PM SET PT M5054 SAT ON HEAT SLEEP PM SET PT M5055 MON M5056 RETURN PM 28 ...

Page 35: ...splay will show the current temperature setting for several seconds then revert to the room temperature During recovery from energy savings the setting displayed will not match the programmed setting This is because the thermostat gradually changes the temperature setting during recovery to provide most efficient use of the heating or cooling equipment PRESENT SETTING ON HEAT SET PT M5057 29 ...

Page 36: ...30 ...

Page 37: ...ttom 3 Lift the thermostat up and off the subbase HEAT COOL OFF ON AUTO FAN M3760 AUTO HEAT OFF COOL ON AUTO FAN M3761 AUTO 31 PM MORNIMG MON HEAT ON ROOM SYSTEM M3758 RUN PROGRAM TIME TEMPERATURE PRESENT SETTING SKIP NEXT PERIOD CHANGE TO LAST PERIOD SET PRESENT DAY TIME HOLD TEMP WAKE SLEEP RETURN AHEAD WARMER BACK COOLER LEAVE PERIOD DAY SET HEAT COOL ...

Page 38: ...3 Tighten the captive screws 32 MAINTAINING YOUR THERMOSTAT HEAT AUTO COOL OFF ON AUTO FAN M3759 M3757 PM RETURN MON HEAT ON SYSTEM AUTO PM MORNIMG MON HEAT ON ROOM SYSTEM M3756 RUN PROGRAM TIME TEMPERATURE PRESENT SETTING SKIP NEXT PERIOD CHANGE TO LAST PERIOD SET PRESENT DAY TIME HOLD TEMP AHEAD WARMER BACK COOLER PERIOD WAKE SLEEP RETURN LEAVE DAY SET HEAT COOL ...

Page 39: ...ries are dead when you start you will not have to reprogram the thermostat if you insert the new batteries within 20 30 seconds 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 all face toward the right Replace the thermostat on the wall...

Page 40: ...ing most power outages Once the power is restored the system will resume normal operation If the display goes off when power is lost either the backup batteries need to be replaced or are not installed When power is restored the display will flash 1 00 PM to remind you to reprogram 34 ...

Page 41: ...when you re home Energy saving temperature The lower heating or higher cooling temperature that lets you save on heating and cooling costs when you re asleep or away Also called the setback heating or setup cooling temperature Period key One of the four keys WAKE LEAVE RETURN or SLEEP that you press to check or program the start time and temperature for a time period operates the heating or coolin...

Page 42: ...n the previous period ends WAKE The time period when you want the house at a comfort able temperature while the family gets up and gets ready to leave for work or school This is the only period that must contain a time and temperature LEAVE The time period when you can set back winter or set up summer the temperature for energy savings because the family is usually away from home RETURN The time p...

Page 43: ...program a daytime energy savings period leave the LEAVE and RETURN periods blank Weekday Program START HEATING COOLING PERIOD TIME TEMPERATURE TEMPERATURE WAKE LEAVE RETURN SLEEP Saturday Program START HEATING COOLING PERIOD TIME TEMPERATURE TEMPERATURE WAKE LEAVE RETURN SLEEP YOUR PERSONAL PROGRAM 37 ...

Page 44: ...Sunday Program START HEATING COOLING PERIOD TIME TEMPERATURE TEMPERATURE WAKE LEAVE RETURN SLEEP 38 YOUR PERSONAL PROGRAM ...

Page 45: ...shes during operation Programming has been lost because of a power outage You must reprogram Program is lost due to power outage Check that backup batteries are installed correctly Replace when necessary Reprogram the thermostat Temperature change occurs at the Check the program times for the period in question Be sure that AM wrong times and PM indications are correct Make sure the current day an...

Page 46: ...s in the cooling equipment Allow up to ten minutes after changing the setting before the compressor starts If temperature setting is lower than current temperature and display says COOL ON or SYSTEM light is on contact your heating and air conditioning contractor The house is too warm or too cool Press PRESENT SETTING to check the current temperature setting If desired change the time or temperatu...

Page 47: ...ent Recovery the thermostat will turn on the furnace as early 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 of your WAKE time but it will vary depending on your system the weather and how much the temperature dropped in your house during the night If it is so cold outside that your house drops to your s...

Page 48: ...s of the country don t have wide temperature swings during a 24 hour period so it is not necessary Desert climates such as Phoenix are the exception because of wide variations in temperature that may require both the air conditioner and furnace to run during different times within a given 24 hour period 7 Sometimes my Chronotherm III Thermostat doesn t allow the house temperature to drop to my SLE...

Page 49: ...lect the program day during programming Select the time period to program or review Switch between heat and cool modes during programming or when reviewing the program Set the time ahead and back Hold either key down to change the setting faster SET PRESENT DAY TIME DAY LEAVE RETURN SLEEP WAKE SET HEAT COOL AHEAD BACK 43 ...

Page 50: ...emperature to the set point of the previous period Maintain the current temperature through the next program period Start your programmed schedule cancel temporary program changes See the current temperature setting Setting may not match programmed setting during recovery from energy savings WARMER COOLER 44 QUICK REFERENCE TO THE KEYS PRESENT SETTING RUN PROGRAM SKIP NEXT PERIOD CHANGE TO LAST PE...

Page 51: ...intenance 31 Manual operation 26 Operation 23 Period keys 43 Personal program 37 Power outage 34 Preprogrammed schedule 35 Present setting 26 Program schedule 27 Programming overview Programming steps 6 Quick reference to the keys 43 RETURN 36 43 Removing thermostat 31 Replacing batteries 33 Replacing thermostat 32 SLEEP 30 35 Saturday program 12 35 37 Set cooling temperatures 14 Set current day 6...

Page 52: ... 20 Switch system 21 System light 35 System switch 21 Table of Contents i Temporary program changes 23 Time 6 Time period 36 Troubleshooting 39 WAKE 36 43 Weekday program 7 14 36 37 See the product features inside the front cover 46 INDEX ...

Page 53: ...sion 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 OR DAMAGE OF ANY KIND INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING DIRECTLY OR INDIRECTLY FROM ANY BREACH OF ANY WARRANTY EXPRESS OR IMPLIED OR ANY OTHER FAILURE OF THIS PRODUCT Some states do not allow the exclusion or...

Page 54: ...48 ...

Page 55: ...49 ...

Page 56: ...ler at the touch of a key Bypass the stored program for a single period Choose system and fan operating modes with the thermostat switches on subbase Simple Four Step Programming Of course you can use the schedule preprogrammed into your new thermostat see Glossary page 35 But it s an easy matter to program the thermostat to fit your lifestyle 1 Set the current time and day See page 6 2 Set the pr...

Page 57: ...trol Helping You Control Your World Honeywell Inc Honeywell Limited Honeywell Limitée 1985 Douglas Drive North 740 Ellesmere Road Golden Valley MN 55422 Scarborough Ontario M1P 2V9 C H Printed in Taiwan R O C Form Number 69 0743 7 93 QUALITY IS KEY ...

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