Chronotherm III for Comfort and Convenience OWNER'S GUIDE Congratulations! You made a smart choice when you purchased your new Honeywell Communicating Chronotherm III Thermostat. It's the smart thermostat that: s Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning should go on to have the house at the desired comfort temperature by the time you wake up. s Saves the maximum amount of energy and money by remembering to automatically set back the heat or air conditioning when you leave home. s Provides the ultimate in comfort and convenience by coming to you already programmed. But it's your choice--use the preprogrammed schedule or set your own. s Can be connected to a Honeywell's TotalHome system for external access and control. TotalHome system devices communicate using HBus, a Honeywell communications protocol. Features Monitor thermostat operation; read current time and room temperature at a glance. Set different schedules for weekdays, Saturday, and Sunday. Check status light to see if the thermostat is on, even in the dark. Set the temperature warmer or cooler with the touch of a key. Choose manual or programmed thermostat operation. Bypass the stored program for a single period. Choose system and fan operation with the thermostat switches (on subbase). Program up to four different time periods in each schedule. AUX. HT. and EM. HT. on T8631R. See Glossary, page 40. Simple Four-Step Programming Of course, you can use the schedule preprogrammed into your new thermostat. See Glossary, page 40-42). But it's an easy matter to program the thermostat to fit your lifestyle. 1 Set the current time and day. See page 1. 2 Set the program schedule and heating temperatures. See page 2. 3 Set the cooling temperatures. See page 7. 4 Set the system and fan switches. See page 12. TABLE OF CONTENTS Programming Your Thermostat ........................... 1-13 Setting the current day and time ............................. 1 Setting the program schedule and heating temperatures .................................................................... 2 Setting the cooling temperatures ............................ 7 Setting the system and fan switches on the subbase ............................................................ 12 Operating Your Thermostat ............................... 14-20 Temporarily changing the program ....................... 14 Permanently changing the program ...................... 15 Operating the thermostat manually ....................... 16 Canceling program settings ................................... 17 Checking the program times and temperatures .... 18 Checking the current temperature setting ............. 19 External access and control of thermostat ............ 20 Maintaining Your Thermostat ............................ 21-24 Removing the thermostat ...................................... 21 Replacing the thermostat ...................................... 22 Replacing the batteries .......................................... 23 Power outages ...................................................... 24 Adaptive Intelligent RecoveryTM ........................ 25-28 Selecting Recovery Setting ................................ 29-30 Heat Pumps with Supplemental Heat ................ 31-32 Answering Common Questions About the Chronotherm III Thermostat ............................................ 33-36 Saving Energy Across the U.S. .......................... 37-39 Glossary ............................................................... 40-42 Your Personal Program ...................................... 43-44 Troubleshooting Guide ....................................... 45-46 Quick Reference to the Keys ............................. 47-48 Index ..................................................................... 49-50 Warranty .................................................................... 51 i PROGRAMMING YOUR THERMOSTAT STEP 1 SETTING THE CURRENT DAY AND TIME You can program this thermostat only on the wall with 24 Vac applied to R and C terminals. 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 40, for definitions of unfamiliar words. SET PRESENT DAY/TIME Press and release. The display shows 1:00 PM Mon. Press and hold until the current day appears in the display. Press and hold until the current time appears in the display. Be sure AM or PM appears as desired. You have programmed the current day and time. Go on to Step 2. PM MON PM TUE DAY PM TUE AHEAD BACK 1 STEP 2 SETTING THE PROGRAM SCHEDULE AND HEATING TEMPERATURES Before You Begin... The schedule form on page 43 provides an opportunity to plan your schedule. Now... Start by programming the WAKE time and temperature for weekdays. WAKE Press and release. Note that the display shows WAKE, 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. If using T8631A in Conventional Recovery ( s visible in display). See Glossary section. With Convential Recovery the time should be set 30 or more minutes ahead of desired comfort time to get the house comfortable. AM MON TUE WED THU FRI WAKE ON HEAT SET PT SET HEAT/COOL AM MON TUE WED THU FRI WAKE ON HEAT SET PT DAY AM MON TUE WED THU FRI WAKE ON HEAT SET PT AHEAD AM MON TUE WED THU FRI WAKE ON HEAT The thermostat requires a program for WAKE. You can program LEAVE, RETURN and SLEEP or not, as you please. SET PT BACK 2 PROGRAMMING YOUR THERMOSTAT WARMER COOLER Press and hold until the display shows the desired temperature. If the display starts to blink while you are holding down TEMPERATURE WARMER or COOLER, you have reached the setting limit. Press and release. The display shows LEAVE, but no time or temperature. Press and hold until the display shows the desired starting time. AM MON TUE WED THU FRI WAKE ON HEAT SET PT Program the LEAVE time and temperature, if desired. NOTE: You can cancel the LEAVE, RETURN or SLEEP program by holding down the key until the time and temperature disappear from the display. LEAVE SET PT MON TUE WED THU FRI LEAVE ON HEAT AM MON TUE WED THU FRI LEAVE ON HEAT AHEAD BACK SET PT WARMER COOLER Press and hold until the display shows the desired temperature. AM MON TUE WED THU FRI LEAVE ON HEAT SET PT 3 Program the RETURN time and temperature, if desired. RETURN Press and release. The display shows RETURN, but no time or temperature. Press and hold until the display shows the desired starting time. T8631A using Conventional Recovery ( s visible in display) should be set 30 or more minutes ahead of desired comfort time. Press and hold until the display shows the desired temperature. SET PT MON TUE WED THU FRI RETURN ON HEAT AHEAD BACK PM MON TUE WED THU FRI RETURN ON HEAT SET PT WARMER COOLER PM MON TUE WED THU FRI RETURN ON HEAT SET PT Program the SLEEP time and temperature, if desired. SLEEP Press and release. The display shows SLEEP, the preprogrammed time and temperature. Press and hold until the display shows the desired starting time. PM MON TUE WED THU FRI SLEEP ON HEAT SET PT AHEAD BACK PM MON TUE WED THU FRI SLEEP ON HEAT SET PT 4 PROGRAMMING YOUR THERMOSTAT WARMER COOLER Press and hold until the display shows the desired temperature. PM MON TUE WED THU FRI SLEEP ON HEAT SET PT Set the SATURDAY schedule. Use the same procedure as for weekdays. DAY Press and release until SAT appears on the display. Press WAKE, LEAVE, RETURN or SLEEP to select the time period. PM SAT SLEEP ON HEAT SET PT WAKE LEAVE SLEEP RETURN AHEAD BACK Press the AHEAD/BACK keys to set the time and the WARMER/COOLER keys to set the temperature. WARMER COOLER 5 Set the SUNDAY schedule. Use the same procedure as for weekdays. DAY Press and hold until SUN appears on the display. Press WAKE, LEAVE, RETURN or SLEEP to select the time period. PM SUN SLEEP ON HEAT SET PT WAKE LEAVE SLEEP RETURN AHEAD BACK Press 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 conditioning, go to Step 3, WARMER COOLER RUN PROGRAM If you do not want to program cool temperature, skip Step 3 and press RUN PROGRAM key. 6 PROGRAMMING YOUR THERMOSTAT STEP 3 SETTING THE COOLING TEMPERATURES The program times are the same for both heating and cooling. Only the cooling temperatures need to be programmed if you have already programmed for heating. If you change program times for cooling, you are also changing them for heating! To set times as you program the cooling temperatures, use the TIME AHEAD and BACK keys as described in Step 2. First program the WAKE temperature for weekdays. WAKE Press and release. The display shows WAKE, the time and temperature you programmed for heating. Press and release so COOL shows on the display, along with the programmed cooling temperature. If display reads SAT or SUN, press and hold until MON TUE WED THU FRI appears. AM SUN WAKE ON HEAT SET PT SET HEAT/COOL AM SUN WAKE COOL SET PT DAY AM MON TUE WED THU FRI WAKE COOL SET PT 7 WARMER COOLER Press and hold until the display shows the desired temperature. If the display blinks while you hold down TEMPERATURE WARMER or COOLER, you have reached the setting limit. Press and release. The display shows LEAVE, the time programmed for heating and 78° F. Press and hold until the display shows the desired temperature. AM MON TUE WED THU FRI WAKE COOL SET PT Program the LEAVE temperature, if desired. LEAVE AM MON TUE WED THU FRI LEAVE COOL SET PT AM MON TUE WED THU FRI LEAVE COOL WARMER COOLER SET PT Program the RETURN temperature, if desired. RETURN Press and release. The display shows RETURN, the time programmed for heating and 78° F. PM MON TUE WED THU FRI RETURN COOL SET PT 8 PROGRAMMING YOUR THERMOSTAT WARMER COOLER Press and hold until the display shows the desired temperature. PM MON TUE WED THU FRI RETURN COOL SET PT Program the SLEEP temperature if desired. SLEEP Press and release. The display shows SLEEP, the time programmed for heating and 78° F. Press and hold until the display shows the desired temperature. PM MON TUE WED THU FRI SLEEP COOL SET PT WARMER COOLER PM MON TUE WED THU FRI SLEEP COOL SET PT Set the cooling temperatures for the SATURDAY schedule. Use the same procedure as for weekdays. DAY Press and hold until SAT appears on the display. PM SAT COOL SLEEP SET PT 9 WAKE Press WAKE, LEAVE, RETURN or SLEEP to select the time period. LEAVE SLEEP RETURN WARMER COOLER Press the WARMER/COOLER keys to set the temperature. Set the cooling temperatures for the SUNDAY schedule. Use the same procedure as for weekdays. DAY Press and hold until SUN appears on the display. Press WAKE, LEAVE, RETURN or SLEEP to select the time period. PM SUN SLEEP COOL SET PT WAKE LEAVE SLEEP RETURN 10 PROGRAMMING YOUR THERMOSTAT WARMER COOLER Press the WARMER/COOLER keys to set the temperature. You have completed programming the cooling temperatures. Press and release to start the program. TUE LEAVE RUN PROGRAM PM SET PT Go to Step 4. 11 STEP 4 SETTING THE SYSTEM AND FAN SWITCHES ON THE SUBBASE The T8631A does not have the EM. HT. switch position. Note the positions provided on your subbase, then set the switch(s) as desired. First set the fan switch. FAN ON: Use for improved air circulation during special occasions or for more efficient electronic air cleaning. The fan runs continuously. FAN AUTO: Normal setting for most homes and businesses. T8631A: the fan starts and stops with the air conditioner and with the heating equipment when the fan switch (4A) is set for electric heat. When 4A is set for conventional heat, the fan is controlled by the heating equipment. T8631R: the fan starts and stops with the compressor in heat pump systems when the system switch is set to HEAT or COOL. When system switch is set to EM. HT., the fan operates with the auxiliary heat (on some models). EM. HT. (T8631R only): The thermostat controls only the backup heat. The heat pump is off. FAN ON AUTO FAN ON AUTO Then set the system switch. EM. HT. HEAT OFF COOL 12 PROGRAMMING YOUR THERMOSTAT HEAT: The thermostat controls your heating system. EM. HT. HEAT OFF COOL OFF: Both your heating and cooling systems are off. EM. HT. HEAT OFF COOL COOL: The thermostat controls your cooling system. You have finished programming your thermostat. Now, while you enjoy precision temperature control, read on to learn about the operating flexibility that makes this thermostat THE SMART CHOICE. 13 EM. HT. HEAT OFF COOL OPERATING YOUR THERMOSTAT TEMPORARILY CHANGING THE PROGRAM These features let you tailor t ...