Honeywell T8611M7065 User manual

1 69-0819
J.H. • 5-94 • Form Number 69-0819
Microelectronic Programmable
Thermostat Owner’s Manual

2 69-0819
Table of Contents
Programmed Recovery ............................................... 3
Programming Your Thermostat ................................. 6
Programming ............................................................ 6
Program Schedule ............................................... 7
Set the Current Day and Time ............................11
Heating Program .................................................11
Copying One Day’s Program to Another Day .... 12
Cooling Program ................................................ 12
Setting System and Fan Switches.......................... 13
Fan Switch ......................................................... 13
System Switch.................................................... 13
Operating Your Thermostat ...................................... 14
Temporarily Changing the Program ........................ 14
Permanently Changing the Program ...................... 15
Manually Operating the Thermostat ....................... 15
Canceling Program Settings ................................... 15
Checking the Program Times and Temperatures ... 16
Checking the Current Temperature Settings .......... 16
Maintaining Your Thermostat .................................... 17
Removing the Thermostat ....................................... 17
Replacing the Thermostat ....................................... 18
Replacing the Batteries ........................................... 19
Power Outages........................................................ 19
Glossary ...................................................................... 20
Troubleshooting Guide .............................................. 23
Index ............................................................................ 26
Limited One-Year Warranty .............. Inside Back Cover

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Programmed Recovery
PROGRAMMED RECOVERY—
BREAK-THROUGH TECHNOLOGY
SENSES TEMPERATURE MORE LIKE YOU DO
M168
Your new thermostat is so smart, it’s almost human.
■Your body perceives temperature from a variety of
sources, not only from the air in the zone, but also from
your surroundings—walls, windows and furnishings.
■Human beings feel differences in temperature 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 zone actually
feels to a human being.
■Your new thermostat reads the temperature of the wall
as well as the air—and responds to temperature
changes as little as one degree Fahrenheit—so zone
temperature is more likely to feel right to you and
your family.
THE OPTIMUM COMFORT AND ENERGY SAVINGS
SOLUTION
■
This thermostat is actually a small but powerful
computer.
When calculating the exact time to turn on
your furnace or air conditioner, it considers: (1) air
temperature, (2) temperature of the wall and (3) when
you want the comfort temperature established.

4 69-0819
■ During programmed recovery, the thermostat
gradually increases the control temperature and
turns the equipment on and off
several times to save
energy by avoiding
overshooting the comfort
temperature. You can see the current control
temperature anytime during recovery 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
this thermostat to adjust to the weather, your life style,
home construction and heating/cooling system. The
thermostat calculates the LEAVE/RETURN recovery
separately from the SLEEP/WAKE recovery.
IMPORTANT:
With Programmed Recovery, program the
times when 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.

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AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
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
TEMPERATURE
THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY
TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON.
M171

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Programming Your Thermostat
The thermostat can be programmed in your hand
before it is installed or after it is on the wall if you make
sure the batteries are installed. If you need to install or
replace the batteries, refer to the Maintaining Your
Thermostat section.
Your thermostat can be programmed for seven days
(separate programs for each day of the week).
PROGRAMMING
The personal programming chart can be helpful for
plannng your program schedule of time and temperature
settings for various times of the day.
Four time periods are available:
MORNING is the time period when you want the zone
at a comfortable temperature to begin the day. (This
will be a higher temperature during the heating
season, or a lower temperature during the cooling
season.) This is the only period that must contain a
time and temperature for every day.
MIDDAY is the time period you can set for an energy-
saving temperature while the zone is unoccupied.
(This will be a lower temperature during the heating
season, or a higher temperature during the cooling
season.)
EVENING is the time period when you want the zone
at a comfortable temperature for family activities in
the evening.
NIGHT is the time period you can set for an energy-
saving temperature while you are sleeping or the
zone is unoccupied. Set it to start at your family’s
normal bedtime. (For more comfortable sleeping in
the cooling season, some people choose not to
raise the cooling temperature during the night.)
You can set a different schedule for each day of the
week because your requirements will probably be
different for each day.
Fill in the times and temperatures you desire for each
day of the week. If you decide not to program the

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thermostat, it will automatically control heating from
6:00 AM to 10:00 PM at 70°F [21°C]. The temperature
will be 60°F [16°C] from 10:00 PM to 6:00 AM. Cooling is
automatically controlled at 78°F [26°C] 24 hours a day.
Also, you do not need to enter a time and temperature
program for all periods if your schedule does not require
it. For example, a zone that is occupied Monday and
Tuesday only requires programs for MORNING and
NIGHT.
IMPORTANT:
Always press the keys with your finger or
similar blunt tool. Use of sharp instruments like a
pen or pencil point can damage the keyboard.
If you make an error at any time during programming,
just press the RUN PROGRAM key, and continue at the
step where you left off.
PROGRAM SCHEDULE
Sunday Start Time Heating Temp 1Cooling Temp 1
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
1See footnote on page 9.

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Monday Start Time Heating Temp 1Cooling Temp 1
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
Tuesday
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
Wednesday
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
1See footnote on page 9.

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Thursday Start Time Heating Temp 1Cooling Temp 1
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
Friday
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
Saturday
MORNING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
MIDDAY ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
EVENING ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
NIGHT ––––––––––––––––––––– –––––––––––––––––––––– ––––––––––––––––––––––
1Heating and cooling temperatures must be at least 3°F apart for proper control in the AUTO mode.

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M8368
SYSTEM
RUN
PROGRAM
PERIOD
TIME
TEMPERATURE
PRESENT
SETTING
SKIP
NEXT
PERIOD
CHANGE
TO LAST
PERIOD
SET
PRESENT
DAY/TIME
HOLD
TEMP
DAY
SET
HEAT/COOL CANCEL
PERIOD
COPY
FROM AHEAD WARMER
BACK COOLER
WED
MIDDAY
AM
HEAT ON
HEAT AUTO COOL ON AUTO
FAN
ROOM
COPY
TO
OFF
EM. HT EM. HT AUX. HT CHECK
MANUALLY
OPERATE THE
THERMOSTAT
CANCEL A
PROGRAM PERIOD
SELECT A DAY
TO COPY A PROGRAM TO
SET THE
TIME LATER
SET A COOLER
TEMPERATURE
CHANGE THE PROGRAM
BACK TO THE LAST SETTTING
SKIP THE NEXT
PROGRAM PERIOD
SET A WARMER
TEMPERATURE
SEE THE
CURRENT SETTING
SET THE TIME EARLIER
SELECT ONE DAY'S PROGRAM
TO COPY TO ANOTHER DAY
SELECT AND SET A
PROGRAM PERIOD
RETURN TO
THE PROGRAM
SET CURRENT
DAY AND TIME

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SET CURRENT DAY AND TIME
1. To set the day, press and release SET PRESENT
DAY/TIME key.
2. Press and hold DAY key until the current day
appears in the display.
3. To set the time, press and release SET PRESENT
DAY/TIME key.
4. Press and hold AHEAD or BACK key until the
current time appears in the display. Make sure AM or PM
appears as desired.
5. Press RUN PROGRAM key.
HEATING PROGRAM
Choose a day to program first. Monday is used in the
following example, but you can start with any day. Start
by programming the MORNING time and temperatures.
The thermostat requires a MORNING program every
day. Set additional programs as desired.
1. With system switch at HEAT, press and release
PERIOD key. MORNING and the preprogrammed time
and temperature appear on the display. If the display
reads COOL, press and release SET HEAT/COOL key to
switch to heat.
2. Press and hold DAY key until MONDAY (or the
desired day) appears in the display.
3. Press and hold AHEAD or BACK key until the
display shows the time you want the temperature at the
comfort setting.
4. Press and hold WARMER or COOLER key until
the display shows the desired heating temperature.
NOTE: If the display flashes while you are holding down
the WARMER or COOLER key, you have reached the
setting limit. The heating temperature must be at least
three degrees below the cooling temperature. For
example, if the cooling setting is 75°F, the maximum
heating setting is 72°F. To set a higher heating
temperature, you must first raise the cooling setting.
5. Repeat steps 1 through 4 for programming the
remaining periods—MIDDAY, EVENING, NIGHT—as
desired. You can cancel any period showing on the

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display except MORNING by pushing the CANCEL
PERIOD key. To move to the next period while program-
ming, simply press the PERIOD key again.
COPYING ONE DAY’S PROGRAM TO ANOTHER DAY
You can copy one day’s program to any other day or
combination of days. The new program will replace any
program already set in the day selected.
1. If necessary, press and release PERIOD key to
enter the programming mode.
2. Press and hold DAY key until the day containing
the program to be copied shows in the display.
3. Press and release COPY FROM key. The day to
be copied will show, and the next day will flash, in the
display.
4. Press and release COPY TO key if you wish to
copy the program into the day that is flashing in the
display. Note that the
next day starts to flash.
5. Press and release DAY key if you do not wish to
copy into the day that is flashing. Note that the
next day
now starts to flash.
6. Press and release COPY TO key again to select
the day that is flashing, or the DAY key to bypass it.
7. Continue until all desired days are showing in the
display and are
not flashing.
8. Press and release RUN PROGRAM key to copy
the program into all the days you have selected.
9. Follow the procedure described above to program
any remaining days.
NOTE: The display will show 32°F, indicating the
thermostat is operating on backup batteries until the
thermostat is mounted on the subbase and the system
is powered.
COOLING PROGRAM
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.
To set times as you program the cooling temperatures,
use AHEAD and BACK keys. But if you change the times
for cooling, you are also changing them for heating.

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1. Move the system switch to the COOL position, then
follow the same instructions as for the heating program.
2. After programming, adjust fan and system switches
as desired.
3. Press and release RUN PROGRAM key to start the
program.
SETTING THE SYSTEM AND FAN SWITCHES
Fan Switch
Fan switching positions control the fan operation as
follows:
FAN ON: The fan runs continuously. Use for improved
air circulation during special occasions or for more
efficient electronic air cleaning.
FAN AUTO: Normal setting for most zones. The fan
goes on and off with the compressor in heat pump
systems.
System Switch
System switching positions control thermostat
operation as follows:
EM.HT.: The thermostat controls the backup heat only.
The heat pump is off.
HEAT: The thermostat controls your heating system.
AUTO: The thermostat controls either your heating or
cooling system, depending on zone temperature.
COOL: The thermostat controls your cooling system.
OFF: Both the heating and cooling systems are off.
You have finished programming your thermostat. If
you have removed it from the wall to program, replace it
following the procedure on page 18. Read on to learn
about the operating flexibility of your thermostat.

14 69-0819
Operating Your Thermostat
TEMPORARILY CHANGING THE PROGRAM
These features let you customize the program for
those times when someone comes home early, or you
are staying up late, or you plan to be out for the evening.
Changes made with these keys are active for one
program period and then are canceled.
Keep Current Temperature Through the Next Period
Press and release SKIP NEXT PERIOD key. The
name of the period to be skipped will flash in the display
until the start time of the skipped period. During the
skipped period, the display will flash TEMPORARY to
show that the programmed temperature for this period is
not being used.
To Go Back to the Temperature of the Previous
Program Period
Press and release CHANGE TO LAST PERIOD key.
The display will show the name of the previous period
and flash TEMPORARY until the next regularly scheduled
period starts.
To Temporarily Raise or Lower the Temperature for
the Current Period Only.
Press and hold the WARMER or COOLER key until
the desired temperature is reached. The display will flash
TEMPORARY until the next programmed time period
starts.
With the system switch in the AUTO poition, you can
alternate between heating and cooling by pressing and
holding down the PRESENT SETTING key. Use the
WARMER or COOLER key to adjust the temperature
setting for each mode.
If you change your mind.
Press and release RUN PROGRAM key to cancel any
of the temporary settings.

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PERMANENTLY CHANGING THE PROGRAM
If your scdedule changes or you want a different
temperature, you can update any setting without affecting
the rest of the program.
1. Press and hold PERIOD key until the desired time
period shows on the display.
2. Press and hold DAY key until the desired schedule
day shows on the display.
3. Press and hold the time key (AHEAD or BACK),
then the temperature key (WARMER or COOLER) until
the display shows the desired new program.
4. Press and release RUN PROGRAM key to return
to normal operation.
You can copy the new program into other days if you
wish. When you copy a program, all the times and
temperatures for that day are copied.
MANUALLY OPERATING THE THERMOSTAT
This feature is particularly useful when you go on
vacation or other extended absences. It does not cancel
your program.
With the system switch in the AUTO position, you can
alternate between heating and cooling by pressing and
holding down PRESENT SETTING key. Then proceed as
follows:
1. Press and release HOLD TEMP key.
2. Press and hold temperature key (WARMER or
COOLER) to change the temperature setting. After a few
seconds the display will show the current temperature.
3. Press and release the PRESENT SETTING key to
check the temperature setting.
4. Press and release the RUN PROGRAM key to
cancel manual control.
NOTE: Moving the system switch also cancels hold.
CANCELING PROGRAM SETTINGS
The thermostat requires time and temperature settings
in the MORNING time period for each day, but any of the
others can be canceled. Each time period for each day
must be canceled separately.

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1. Press and hold PERIOD key until the desired time
period shows on the display.
2. Press and hold DAY key until the desired day
shows on the display.
3. Press and release the CANCEL PERIOD key to
cancel the time and temperature settings for that time
period. Both the heating and cooling temperatures will be
canceled.
You can use the copy function to cancel the program
from other days, but remember:
all the programs will be
copied, not just the cancellation.
4. Press and release RUN PROGRAM key to return
to normal operation.
CHECKING THE PROGRAM TIMES AND
TEMPERATURES
You can check all the stored settings without affecting
the permanent program.
1. Press PERIOD key until the desired period shows
on the display. The start time and temperature setting will
appear on the display.
2. Press and release DAY key to display the next
daily time and temperature for that period.
3. Press and release RUN PROGRAM key to return
to normal operation.
CHECKING THE CURRENT TEMPERATURE SETTING
Press a single key to compare actual zone tempera-
ture to the setting at any time. Press and release the
PRESENT SETTING key. The display will show the
current temperature setting for several seconds, then
revert to the zone temperature.
With system switch in the AUTO position, press and
hold PRESENT SETTING key to alternate between
heating and cooling settings.
During recovery from energy savings, the setting
displayed will not match the programmed setting. This is
because the thermostat gradually changes the tempera-
ture setting during recovery to provide maximum comfort
combined with the most efficient use of the heating or
cooling equipment.

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Maintaining Your Thermostat
REMOVING THE THERMOSTAT
1. Loosen the two captive screws at
the bottom corners of the case.
2. Pull out the thermostat from the
bottom. 3. Lift the thermostat up and off the base.
PM
MIDDAY
WEDHEATON
ROOM
SYSTEM
RUN
PROGRAM
TIME
TEMPERATURE
PRESENT
SETTING
SKIP
NEXT
PERIOD
CHANGE
TOLAST
PERIOD
SET
PRESENT
DAY/TIME
HOLD
TEMP
DAY
SET
HEAT/COOLCANCEL
PERIOD
COPY
FROMAHEADWARMER
COPY
TOBACKCOOLER
PERIOD
M8366
HEATCOOLOFF
ONAUTO
FAN
M3760
AUTO
HEAT
EM.HTAUTOCOOL
OFF
ONAUTO
FAN
M8370

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REPLACING THE THERMOSTAT
1. Hang the thermostat on the tabs
at the top of the base. 2. Swing down and press on lower edge until thermostat snaps in
place.
3. Tighten the captive screws.
M3757
PM
RETURN
MON HEAT ON
SYSTEM
AUTO
HEAT
EM.HTAUTOCOOL
OFF
ONAUTO
FAN
M8365
PM
MIDDAY
WEDHEATON
ROOM
SYSTEM
RUN
PROGRAM
TIME
TEMPERATURE
PRESENT
SETTING
SKIP
NEXT
PERIOD
CHANGE
TOLAST
PERIOD
SET
PRESENT
DAY/TIME
HOLD
TEMP
DAY
SET
HEAT/COOLCANCEL
PERIOD
COPY
FROMAHEADWARMER
COPY
TOBACKCOOLER
PERIOD
M8367

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REPLACING THE BATTERIES
Your thermostat uses three AAA alkaline batteries. We
recommend Energizer®batteries. The display will flash
“REPL BAT”when the batteries get low. Unless the
display is blank (indicating the batteries are dead) when
you start, you won’t have to reprogram the thermostat if
you can insert the new batteries within 20 to 30 seconds of
taking out the old ones.
To replace:
■Set the system switch to OFF.
■Remove the thermostat from the wall. See page 17.
■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. See page 18.
■Reprogram, if necessary.
POWER OUTAGES
Backup batteries will hold the programming and keep
the display on during 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 p.m. to
remind you to reprogram.
BATTERY PLACEMENT
(NOTE CORRECT PLUS
AND MINUS DIRECTION) M372A

20 69-0819
Glossary
AUX HT light
This light glows whenever the thermostat is calling for
operation of the backup heater. Backup (auxiliary) heat is
more expensive to operate than the heat pump and
typically is used only when the heat pump is unable to
handle the load.
Comfort temperature
The temperature you want when you’re active and
occupying the zone.
EM. HT. light
This light glows whenever the thermostat system
switch is in the EM.HT. position.
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.
Preprogrammed schedule
This is the schedule programmed into your thermostat
at the factory. It sets a night program that provides
energy savings if you don’t set your own program, or if
your personal schedule is lost for any reason.
This program, which is the same for all days of the
week, is: Start Temperature
Period Time Heating Cooling
MORNING 6:00 AM 70°F78°F
MIDDAY ———–——No program——–———
EVENING ————–—No program———–——
NIGHT 10:00 PM 60°F78°F
Program
The times and temperatures you set to define the
comfort and energy saving periods for each day’s
schedule.