T8665A Chronotherm
®
IV
Wireless Thermostat
USER’S GUIDE
1 69-1536–3
69-1536-3
2 69-1536–3
CONTENTS
USING THIS GUIDE .......................................................................................................................................... 5
FEATURES ........................................................................................................................................................ 6
KEYBOARD AND DISPLAY DESCRIPTION .................................................................................................... 7
Keyboard ............................................................................................................................................................ 7
Display ............................................................................................................................................................... 7
ADAPTIVE INTELLIGENT RECOVERY
Optimum Comfort and Energy Savings ............................................................................................................. 11
OPERATING YOUR THERMOSTAT ................................................................................................................. 13
Setting System and Fan Keys ............................................................................................................................ 13
Setting the System Key .................................................................................................................................. 14
Setting the Fan Key ........................................................................................................................................ 14
Setting Temporary Temperatures ....................................................................................................................... 15
Changing Temperature to Temporary Setting Until Next Schedule Period ..................................................... 15
Changing and Holding Temperature Setting Indefinitely ................................................................................ 17
Changing Temperature Setting Until a Designated Day and Period (Vacation Hold) ..................................... 18
Replacing the Batteries ...................................................................................................................................... 21
TM
CONTROL ..................................................................................... 10
3 69-1536–3
Contents (Cont)
Using the (Information) Key ......................................................................................................................... 23
Display Current Setting ................................................................................................................................. 23
Display or Reset Filter Timer Settings .......................................................................................................... 24
SETTING THE CLOCK...................................................................................................................................... 25
Set Current Day and Time ................................................................................................................................. 25
Daylight Saving Time ......................................................................................................................................... 27
PROGRAMMING YOUR THERMOSTAT .......................................................................................................... 28
7-Day Program and Operation ........................................................................................................................... 28
7-Day Preprogrammed Schedule ................................................................................................................. 29
Customizing Your Own 7-Day Schedule ....................................................................................................... 30
Programming the First Day ........................................................................................................................... 31
Copying a Day .............................................................................................................................................. 36
Clearing a Program Period ........................................................................................................................... 39
TROUBLESHOOTING....................................................................................................................................... 41
WARRANTY ...................................................................................................................................................... 43
CUSTOMER ASSISTANCE ............................................................................................................................... 45
4 69-1536–3
USING THIS GUIDE
The T8665A is a multi-functional thermostat. This means it can be used in single or multi-zone applications.
The following symbols will help you identify the features that apply to your system:
ZONING
60
– Triple layer of thermostats with the word, zoning, below. These features are available when more
than one thermostat is used with the W8665E RF Zone
80
70
90
60
90
70
80
–Tip symbol. Look for helpful tips throughout the guide when you see this symbol.
TM
Panel.
5 69-1536–3
FEATURES
• Adaptive Intelligent RecoveryTM Control for comfort
and energy savings.
• Customize the program schedule—program your
own schedule to fit your needs.
• Temporary schedule override—set the thermostat
higher or lower for the current program schedule.
• Permanent schedule override—set the thermostat
higher or lower indefinitely.
• Vacation mode (1 to 255 days) for added comfort
and energy savings. Set the temperature higher or
lower for energy savings while on vacation. At the
same time, set the comfort level you want when
you return.
• Information at the press of a button—use the
(information) key to see the current setpoints.
• Daylight Time key for quick time changes between
Daylight and Standard time.
• Backlit display for improved readability – backlight-
ing on demand (press any key to activate).
• Programmable Fan – your thermostat can activate
the fan in any programming period for improved air
circulation and air cleaning when a Honeywell
wholehouse air cleaner is installed.
6 69-1536–3
KEYBOARD AND DISPLAY DESCRIPTION
Keyboard
The keyboard is located behind the thermostat cover. Three frequently used keys, increase ▲ or decrease ▼
and , are located next to the display. See Fig. 1.
Display
The thermostat displays important information such as day, time, schedule period, temperature, system and fan
operation. See Fig. 2.
7 69-1536–3
TIME / TIME
SETS TIME
FORWARD OR BACK
SET CURRENT
DAY/TIME
SETS CURRENT
DAY AND TIME
RUN PROGRAM
RETURNS THERMOSTAT TO
NORMAL OPERATING MODE
DAY
SETS DAY OF THE WEEK
HOLD TEMP
SETS A HOLD TEMPERATURE
SETTING AND ACTIVATES
VACATION HOLD FEATURE
DAYLIGHT TIME
SELECTS STANDARD TIME
OR DAYLIGHT SAVING TIME
COPY
COPIES SETTINGS FROM ONE DAY TO
ANOTHER DAY FOR QUICK PROGRAMMING
WAKE
SET WAKE TIMES
TEMPERATURES
Run
Program
Hold Temp
AND
Set Current
Day/Time
Day
Daylight
Time
LEAVE
SET LEAVE TIMES
TEMPERATURES
Time
Copy
HEAT/COOL SETTINGS
SWITCHES BETWEEN HEAT SETPOINTS AND
COOL SETPOINTS WHILE PROGRAMMING
Wake
Heat/Cool
Settings
AND
Leave
Set Program
DIGITAL
DISPLAY
Return Sleep
System
Fan
Fig. 1. Thermostat keyboard description.
8 69-1536–3
INCREASE
RAISES TEMPERATURE SETTING
DECREASE
LOWERS TEMPERATURE SETTING
INFORMATION
DISPLAYS CURRENT HEAT/COOL
TEMPERATURE SETTING
RETURN
SET RETURN TIMES
TEMPERATURES
SLEEP
SET SLEEP TIMES
TEMPERATURES
PROGRAM SCHEDULING
WAKE LEAVE RETURN SLEEP
ENTERS PROGRAMMING MODE
FAN
SELECTS AUTO/ON
SYSTEM
SELECTS HEAT/OFF/COOL (AUTO)
AND
AND
M20146
o
System
an
Off
o
On
Cool
Heat
SHOWS THERMOSTAT IS
SHOWS
S C
SHOWS CU
SYS
ON
/COOL
PROCESSING INFORMATION
AND WAITING TO CALL FOR
HEAT OR COOL
SHOWS ADAPTIVE
INTELLIGENT RECOVERY
IS CHANGING THE
TEMPERATURE TO MEET
THE CURRENT
PROGRAM
SHOWS VACATION
HOLD DURATION
SHOWS FILTER
TIMER STATUS
SHOWS CURRENT
DAY OR DAYS BEING
PROGRAMMED
SHOWS CURRENT
PROGRAM PERIOD
OR PERIOD BEING
PROGRAMMED
TM
Set Program
Wait
Recovery
Hold for
Filter
Mon
TueWedThuFriSatSun
Wake
Leave Return Sleep
SHOWS SYSTEM ON
DAYLIGHT SAVING TIME
DISPLAYS
EITHER CURRENT
TIME OF DAY OR
PROGRAM TIMES
SHOWS WHEN
THERMOSTAT
IS IN THE
PROGRAMMING
MODE
Set Day/Time
SHOWS
THERMOSTAT
IS IN THE
SET CURRENT
DAY/TIME MODE
Temporary Setting
SHOWS
TEMPERATURE
SETTING CHANGED
FOR THIS
PROGRAM
PERIOD
AM
Days
Room
DST
SHOWS SMART
RESPONSE IS OFF
SHOWS
TEMPERATURE
DISPLAYED IS THE
CURRENT ROOM
TEMPERATURE
Fig. 2. Example of thermostat display.
AND CONVENTIONAL
RECOVERY IS ON
DISPLAYS EITHER ROOM
OR SET TEMPERATURE
9 69-1536–3
Aut
F
Aut
SHOWS THERMOSTAT IS
CALLING FOR THE FAN
SHOWS TEMPERATURE
DISPLAYED IS THE CURRENT
SET TEMPERATURE
THAT THERMOSTAT
ALLING FOR
I
RRENT
TEM KEY POSITI
HEAT/OFF
SHOWS CURRENT FAN
KEY POSITION ON/AUTO
M20886
ADAPTIVE INTELLIGENT
RECOVERYTM CONTROL
Your new thermostat is so smart, it’s almost human.
You perceive temperature from a variety of sources,
not only from the air in the room, but also from your
surrounding walls, windows and furnishings. Humans
feel differences in temperature as slight as two
degrees Fahrenheit. Common household thermometers and standard thermostats sense only air temperature, which may not reflect how hot or cold the
room actually feels to you. Your new thermostat reads
both the temperature of the wall and in the air, and
responds to temperature changes as little as one
degree Fahrenheit, so room temperature is more
likely to feel right to you and your family.
The thermostat acts like a computer. When calculating the time to turn on your heating or cooling system,
it considers air temperature, wall temperature, and the
time you want to reach the comfort temperature. After
considering these three things, Adaptive Intelligent
Recovery
TM
control gradually changes the temperature from the energy savings setting to the comfort
setting (for example, from a heating temperature of
62° at night to 70° in the morning).
The system runs until the comfort temperature you
choose is reached without overshooting the setting.
This saves energy. How do you know when the
system is in recovery? The thermostat displays
“Recovery” whenever the thermostat activates
Adaptive Intelligent Recovery
TM
control. See Fig. 3.
So, “Recovery” displays during the recovery time from
Sleep to Wake and from Leave to Return.
System
Recovery
Mon
Sleep
AM
Room
Heat
Heat
Fan
Auto
M20148
Fig. 3. Example of “Recovery” indication.
10 69-1536–3
After installation or new schedule programming, your
thermostat learns from experience. Each day it
checks how closely it hit the recovery target (for
example, 70° at 6:00 AM) and adjusts the next day’s
recovery start time accordingly. After four to eight
days, the thermostat has adjusted to local weather,
your lifestyle, the construction of your home, and your
heating and cooling system.
Optimum Comfort and Energy Savings
In Fig. 4, Adaptive Intelligent RecoveryTM control starts
to recover at 5:00 AM and reaches the comfort
temperature of 68° at 6:30 AM. Recovery time varies
with the starting temperature and the comfort temperature you choose.
11 69-1536–3
At 7:00 AM System
TEMPERATURE
At 4:00 AM
Recovery Begins
Recovery
Mon
ENERGY
SAVINGS
PERIOD
Operating in Comfort Mode
At 6:00 AM
Recovery
Continues
Recovery
At 5:00 AM
Recovery
Continues
AM
Recovery
Mon
System
AM
Sleep
Heat
Fan
Room
Auto
Room
Sleep
Mon
Sleep
System
Heat
Fan
Auto
1
System
AM
Heat
Fan
Room
Auto
AM
Mon
Wake
RECOVERY FROM ENERGY SAVINGS
TIME
Room
COMFORT
PERIOD
System
Heat
Fan
Auto
THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON.
1
IF Recovery IS DISPLAYED, PRESS TO SEE THE COMFORT SETPOINT.
M20149
Fig. 4. Explanation of Adaptive Intelligent RecoveryTM control.
12 69-1536–3
OPERATING YOUR THERMOSTAT
Your new thermostat saves energy and keeps you
comfortable at the same time. By now you may be
wondering how to program your thermostat and how
to use some more time and energy-saving features.
First, let’s look at features you’ll be using often, like
setting the System and Fan keys, how to override the
current programming mode or to hold the thermostat
at a specific temperature while you go on vacation.
You can even program the thermostat to return to
your regular programming schedule on your last day
of vacation so you are comfortable when you return
and yet save energy while you are away.
Setting System and Fan Keys
Use the System and Fan keys to change the system
and fan settings. The fan settings can be set for each
schedule period individually. The system selection is
for all the schedule periods.
CAUTION
Equipment Damage Hazard.
Can cause permanent damage to the
compressor or other equipment.
To avoid possible compressor damage, allow
the compressor to remain off for five minutes
before restarting.
To avoid possible equipment damage, do not
operate cooling when the outside temperature
is below 50°F (10°C). See equipment manufacturer instructions.
13 69-1536–3
Setting the System Key
ZONING
Press the System key until the desired
system (Heat, Off, Cool, or Auto) displays.
System
Setting the Fan Key
Press Fan key until the desired mode
(On or Auto) displays:
Fan
Heat: The thermostat controls the heating.
Off: Both the heating and cooling are off.
Cool: The thermostat controls the cooling.
Auto: The thermostat automatically changes
between heating and cooling operation,
depending on the indoor temperature.
Thermostat will satisfy system demand
on a first call basis. For example, if
zone 2 (any zone) is calling for heating
ZONING
and then zone 1 (any zone) asks for
cool – the system will satisfy zone 2
before turning on the cool for zone 1.
On: Fan operates continuously.
Auto: Fan operates only when heating
or cooling.
displays when the thermostat is
calling for the fan in this zone.
NOTE: The thermostat may delay
turning on the fan until another zone
has completed its call for heat or cool
before initiating the fan call for this zone.
14 69-1536–3
Setting Temporary Temperatures
You can override the current schedule period to temporarily change the temperature setting until the next schedule
period, or you can change and hold the temperature setting indefinitely. You can also change the temperature setting
until a designated day and period (for example, while you are on vacation).
Changing Temperature to Temporary Setting Until Next Schedule Period
Press increase ▲ or decrease ▼ until the desired temperature
setpoint displays.
The temporary temperature setting you select displays for
approximately three seconds. The display reads “Temporary”
until the next period begins or when you cancel the temporary
temperature setting.
While selecting a temporary setting, only the setpoint displays.
15 69-1536–3
Temporary Setting
M14563
Press the Run Program key to cancel the temporary
temperature setting before the designated time.
Program
Run
AM
Temporary
System
Heat
Mon
Heat
Fan
Auto
M14564
After selecting a temporary setting, the display reads
“Temporary” until canceled. Example display shows
temporary heat setting of 70° at 6:00 AM.
80
70
60
60
70
If ▲ or ▼ appears under the temperature display, it means that both the heating and cooling
90
setpoints are being adjusted. Tapping the increase ▲ or decrease ▼ key changes both the heat
90
80
and cool setpoints by one degree. Press key after the desired setpoint is reached to verify
the setpoints.
16 69-1536–3
Changing and Holding Temperature Setting Indefinitely
1. Press Hold Temp key once.
2. Press increase ▲ or decrease ▼ to change the tempera-
ture setpoint, if desired.
NOTE: The display changes from the setpoint to the
room temperature after approximately three
seconds.
Press Run Program key to cancel hold.
Hold Temp
Run
Program
Press Hold Temp key once to display the thermostat in Hold
mode. Example display shows temporary heat setting of 60°.
17 69-1536–3
Heat
Setting
System
Fan
M14565
Heat
Auto
Changing Temperature Setting Until a Designated Day and Period (Vacation Hold)
When setting Vacation Hold in a zone
system, set all thermostats independently to Vacation Hold.
ZONING
1. Press Hold Temp key twice.
Hold Temp
IMPORTANT
To cancel the Vacation Hold before the
designated time, press Run Program key.
2. Press Time or Time until the desired
number of days (1 to 255
days) displays.
TIME
Hold for
Days
Wake
Press Hold Temp key twice to display the thermostat in Vacation
mode. Example display shows temporary heat setting of 60°.
Hold for
Days
Wake
Press the Time or Time key to select the number of vacation
days. Example display shows 18 vacation days.
18 69-1536–3
Setting
Heat
Setting
Heat
System
Heat
Fan
M14833
System
Heat
Fan
Auto
M14834
Auto
Press Wake, Leave, Return or Sleep key to select the
period the Hold ends.
Leave Return
SleepWake
Setting
System
Heat
Hold for
Days
Return
Heat
In this example, the Hold ends after the 18
Fan
Auto
M14571
th
day at the beginning of the Return period.
4. Press increase ▲ or decrease ▼ to adjust the tempera-
ture setting, if desired.
NOTE: Only the heating temperature is used when
the System is set to Heat. Similarly, only the
cooling temperature is used when the System
is set to Cool. The thermostat uses both the
heating and cooling temperatures when the
System is set to Auto.
19 69-1536–3
Hold for
Days
Return
Press increase ▲ or decrease ▼ key to select
a new Hold temperature. Example display
shows temporary heat setting of 55
Heat
Setting
System
Heat
Fan
M14572
Auto
5. Press Heat/Cool Settings key to change between heat and cool settings.
Heat/Cool
Settings
6. Press increase ▲ or decrease ▼ to adjust the temperature setting, if desired (for example, if cool is set at
84°, cooling equipment operates when the room temperature is above 84°F).
To cancel the Vacation Hold before the designated time, press Run Program key at each thermostat.
ZONING
Pressed the wrong key?
Want to start over?
Don’t worry!
You can always press
Run
Program
to return display to normal.
20 69-1536–3
Replacing the Batteries
This thermostat uses three AA alkaline batteries. Batteries must be installed for programming and operation of
the thermostat and heating (cooling system).
The batteries are located in the wallplate. See illustration.
IMPORTANT
Although the thermostat has a low battery
indicator, replace the batteries once a year to
prevent leakage and to prevent the thermostat
and heating/cooling system from shutting down
due to lack of battery power in the thermostat.
1. When the batteries are running low, a REPL BAT
message flashes from one to two months before
the batteries run out completely. Replace the
batteries as soon as possible when the message
flashes.
WALLPLATE
B
RRCOWYG
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
21 69-1536–3
M10622
2. Remove the thermostat by placing your thumb
between the thermostat and wallplate and
pulling the thermostat up and away as shown.
M16424
If you insert new batteries within 20 to 30 seconds of
removing the old batteries, the system retains the
current time and day. If the display is blank, the
batteries are dead or installed incorrectly. You must
reset the time and day. Refer to Setting the Clock
section for instructions.
As a precaution when leaving home for
80
70
90
60
60
70
longer than a month, change batteries
90
80
before leaving to prevent the system from
shutting down due to lack of power.
Always use fresh alkaline batteries.
Nonalkaline batteries do not last as long; they also
can leak, causing damage to the thermostat and the
wall surface. Honeywell recommends Energizer®
batteries.
22 69-1536–3
Using the (Information) Key
The (information) key provides information at your
fingertips. The sequence of key presses is:
• Current setpoint of mode in use (Heat or Cool).
• Setpoint of mode not currently in use.
Displaying Current Settings
Wake
AM
Tue
Room
DST
INFORMATION KEY
System
Fan
Heat
Auto
M20150
Press key once to check the current temperature setpoint. Press key twice to check the temperature
setpoint of the mode not currently in use.
Cool
M20152
Press key once to display current setpoint.
Example display shows cooling setpoint of 75°.
23 69-1536–3
Display or Reset Filter Timer Settings
When the thermostat activates a timer, the thermostat
flashes Filter until the timer resets.
1. Reset the timer by pressing the i key until the
expired timer is displayed.
Filter
Days
M20243
2. Press the Timer ▲ key to reset the timer.
Filter
Days
M20244
3. Press the Run Program key.
Note: You can view the number of days remaining at
any time by pressing the i key three or four
times. If more than one timer is active, all active
timers show sequentially when pressing the i
key several times.
If you want to use this feature and it is not currently
activated, check the Installation Instructions at
www.honeywell.com/yourhome or call 1-800-468-
1502.
24 69-1536–3
SETTING THE CLOCK
Setting Current Day and Time
On initial power up or after an extended power loss, “1:00 PM”
flashes on the display until a key is pressed.
1. Press Set Current Day/Time key.
IMPORTANT
Always press the keys with your fingertip or similar blunt tool. Sharp instruments like pens and pencil
points can damage the keyboard.
Set Current
Day/Time
25 69-1536–3
Mon
Set Day/Time
PM
Press Set Current Day/Time key to
show information displayed.
M14580
2. Press Day key until the current day displays.
Day
Set Day/Time
60
60
70
Thu = Thursday, Fri = Friday, Sat = Saturday,
90
80
Sun = Sunday.
Mon = Monday, Tue = Tuesday, Wed = Wednesday,
80
70
90
3. Press Time or Time key until the current time displays.
TIME
Tap the Set Current Day/Time key to advance
80
70
90
60
60
the time in one-hour increments.
90
70
80
Set Current
Day/Time
4. Press Run Program key to return to normal operation.
Run
Program
26 69-1536–3
PM
Tue
Press Day key to set the current day.
Example display shows Tuesday.
Set Day/Time
AM
Tue
Press Time or Time key to set the current time.
Example display shows 8:15 AM.
M14581
M14582
Daylight Saving Time
NOTE: If the current time is Daylight Saving Time, press
Daylight Time key to display “DST.”
60
60
70
within a five minute period scrolls you through
90
80
various time options (example: one hour
Pressing Daylight Time key more than once
80
70
90
earlier or later with or without DST). Pressing
Daylight Time key six times in a five minute
period returns you to your original setting.
Daylight
Time
27 69-1536–3
Set Day/Time
AM
Tue
DST
M14583
Press Daylight Time key to set Daylight Saving Time.
PROGRAMMING YOUR THERMOSTAT
7-Day Program and Operation
Your thermostat is 7-day programmable. 7-day programming means you can set your thermostat for four periods
(Wake, Leave, Return and Sleep) and up to eight temperatures (four Heat and four Cool) for each day of the
week. Each day can be the same or different.
Program Periods:
WAKE The program period when you want the house at a comfortable temperature when you get up and
LEAVE The program period you can set for an energy saving temperature while you are away at work or
RETURN The program period when you want the house at a comfortable temperature for activities before
SLEEP The program period you set for an energy-saving temperature while you are sleeping. (This is a lower
while you get ready for work or school. (This is a higher temperature during the heating season and a
cooler temperature during the cooling season.)
school. (This is a lower temperature during heating season, and higher temperature during cooling
season) and it follows the WAKE period.
bedtime. (This is a higher temperature during the heating season and a cooler temperature during the
cooling season) and it follows the energy-saving LEAVE period.
temperature during heating season, and higher temperature during cooling season) and it follows the
RETURN period.
28 69-1536–3
7-Day Preprogrammed Schedule
Your thermostat is preprogrammed with the schedule shown in Table 1 (same schedule for all days of the week).
You may keep this schedule or develop your own. Before starting the programming procedure, use Table 2 to
plan your schedule.
Instructions:
1. Write the time you want for each program period.
2. Write the heating and cooling temperatures you want for each period.
3. Draw a circle around the fan operation you desire for each period.
Table 1. 7-Day Preprogrammed Schedule.
WAKE LEAVE RETURN SLEEP
ALL DAYS TIME 6:00 AM
FAN AUTO
H 70 (21) C 78 (2.5)
TIME 8:00 AM
FAN AUTO
H 62 (16.5) C 85 (29.5)
29 69-1536–3
TIME 6:00 PM
FAN AUTO
H 70 (21) C 78 (25.5)
TIME 10:00 PM
FAN AUTO
H 62 (16.5) C 82 (28)
Customizing Your Own 7-Day Schedule
Table 2. Your 7-Day Schedule.
WAKE LEAVE RETURN SLEEP
SUNDAY TIME
FAN AUTO ON
H C
MONDAY TIME
FAN AUTO ON
H C
TUESDAY TIME
FAN AUTO ON
H C
WEDNESDAY TIME
FAN AUTO ON
H C
THURSDAY TIME
FAN AUTO ON
H C
FRIDAY TIME
FAN AUTO ON
H C
SATURDAY TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
30 69-1536–3
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
TIME
FAN AUTO ON
H C
60
70
Don’t worry! Your thermostat retains the schedule (preprogrammed or your own) for the life of the
90
80
product. The time and day information is retained for a minimum of twenty minutes during a
About Power Outages…
80
70
90
60
power outage. After a longer power outage, you may need to set the current time and day (“1:00
PM” flashes on the display), but the schedule is retained.
Programming the First Day
To modify the preprogrammed schedule, start by programming the Wake time and temperature and fan operation
for any one day.
31 69-1536–3
1. Press the Wake key.
Wake
Set Program
AM
Setting
System
Heat
2. Press Day key until the desired day displays.
Tue
Wake
Heat
Press the Wake key to enter the program mode. Example
display shows 6:00 AM on Tuesday with Heat set to 70°F.
Day
Set Program
AM
Setting
Mon
Wake
Heat
Press Day key to select the day to program. Example
display shows Monday is selected and ready to program.
32 69-1536–3
Fan
M14586
System
Fan
M14588
Auto
Heat
Auto
3. Press Time or Time key until the desired Wake
time displays.
TIME
The program times are in fifteen-minute intervals;
80
70
90
60
60
for example, 8:00, 8:15, 8:30.
90
70
80
Set Program
AM
Mon
Wake
Press the Time or Time key to select the
time the Wake period will begin. Example display
Heat
shows the Wake period will begin at 6:30 AM.
Setting
System
Fan
M14589
Heat
Auto
4. Press increase ▲ or decrease ▼ key until the desired
Wake temperature displays.
80
70
90
60
60
The setpoint temperature range is 40 to 90°F
90
70
80
(4 to 32°C) for heating and 55 to 99°F
(13 to 37°C) for cooling.
33 69-1536–3
Set Program
Setting
AM
Mon
Wake
Heat
Press increase ▲ or decrease ▼ key to select the
temperature for the Wake period. Example display
shows the heating Wake period set for 68°.
System
Fan
M14590
Heat
Auto
5. Press Fan key to modify fan operation. Selecting Auto means the fan runs only when the
heating or cooling equipment is operating. Selecting On means the fan runs continuously
for the entire schedule period.
Fan
6. Press Heat/Cool Settings key to make selections for the opposite system setting (either
Heat or Cool).
Set Program
AM
Mon
Wake
Press Heat/Cool Settings key to select the cooling system
(if you previously set the heating temperature). The
current setting displays. Example display shows
the cooling system previously set for 78°.
34 69-1536–3
Setting
Cool
Heat/Cool
Settings
System
Fan
M14591
Heat
Auto
7. Press increase ▲ or decrease ▼ key until the desired
temperature setpoint displays.
Set Program
AM
Setting
System
Heat
Mon
Wake
Press increase ▲ or decrease ▼ to select the
cooling Wake temperature. Example display
Cool
shows the cooling Wake period set for 76°.
8. Press Leave, Return or Sleep and repeat steps 3 through 6 to program the entire day. The day (first day of
a 7-day schedule) is now programmed.
Leave Return
Sleep
IMPORTANT
Repeat steps 1 through 7 for each day of the week that has a different schedule from the first day. Or
refer to Copying a Day section to copy any programmed day to another day.
9. Press Run Program key to return to normal operation.
35 69-1536–3
Run
Program
Fan
Auto
M14592
Copying a Day
80
70
The thermostat must be in the program mode to use the copy feature. Go to step 2 if the thermostat is
90
60
60
90
already in the program mode (set program displays in the upper left corner).
70
80
1. Press Wake, Leave, Return or Sleep key to enter program mode.
2. Press Day key to select the day to copy from.
Day
Mon
Wake
36 69-1536–3
Leave
Set Program
Return
SleepWake
Setting
AM
Heat
Press Day key to select the day schedule to copy.
Example display shows the thermostat in program
mode with Monday ready to be copied.
System
Fan
M14590
Heat
Auto
3. Press Copy key.
Copy
4. Press Day key until the day to be copied to is displayed.
Day
37 69-1536–3
Mon
M14594
Press Copy key to copy a day schedule into memory. Example
display shows Monday schedule was copied into memory.
Mon Wed
M14595
Press Day key again to select the day to copy to.
Example display shows Monday and Wednesday.
Because Monday was already selected, Monday
schedule will be copied to Wednesday.
5. Press Copy key.
Copy
NOTE: “donE” displays for two seconds before the
normal display returns.
Press the Copy key again to complete the copy command.
Example display shows “donE”. Monday schedule was
successfully copied to Wednesday (Monday and Wednesday
6. Repeat steps, as necessary, for all the periods and days desired.
M14596
now have the same schedule).
7. Press Run Program key to return to normal operation.
38 69-1536–3
Run
Program
Clearing a Program Period
The thermostat must be in the program mode
80
70
90
60
60
1. Press Leave, Return or Sleep key to enter program
to use the clear feature. Go to step 2 if the thermo-
90
70
80
stat is already in the program mode
(Set Program displays in upper left corner).
mode.
Leave
Return
Sleep
Set Program
Setting
AM
Mon
Leave
Press Leave, Return, or Sleep to enter the
program mode. Example display shows 8:00 AM on
Monday in the Leave period with Heat set for 62° .
Heat
System
Fan
M14597
Heat
On
2. Press Day key until the desired day displays.
Day
Set Program
Setting
AM
Sat
Leave
Press Day key to select the day to begin clearing
the periods. Example display shows Saturday is selected
Heat
39 69-1536–3
System
Fan
M14598
Heat
On
3. Press and hold Leave, Return or Sleep key until the start
time and temperature setting are cleared (approximately
three seconds).
Leave
Return Sleep
Set Program
Setting
NOTE: Wake cannot be cleared.
You do not have to program a replacement time for the remaining periods; for example, Wake and
80
70
90
60
60
Sleep. If you clear only the Leave and Return periods for Saturday (or any day), the thermostat
90
70
80
remains in the Wake period for all of Saturday until the Sleep period.
4. Repeat steps, as necessary, for all the periods to be cleared.
5. Press Run Program key to return to normal operation.
40 69-1536–3
Run
Program
Sat
Leave
Heat
Press and hold Leave, Return or Sleep key to
clear the period for that day. Example display
shows Saturday Leave period cleared.
M14599
TROUBLESHOOTING
Symptom Possible Cause Action
Display does not
come on.
Temperature setting
does not change
(Example: cannot set
the heating higher or
the cooling lower).
Heating does not
come on.
"Filter" flashes in
display.
Thermostat is not being
powered.
The upper or lower
temperature limits were
reached.
System selection is not set to
Heat. Heating setpoint is
below room temperature.
Indicates a Filter Timer has
expired.
• Check if the batteries are correctly installed.
• Check if the thermostat is mounted and latched on the
wallplate—mount and latch the thermostat on the
wallplate.
Check that the temperature setpoints are:
Heating: 40 to 90°F (4 to 32°C)
Cooling: 55 to 99°F (13 to 37°C).
Check that setpoint is above room temperature.
Check if the circuit breaker is tripped—reset the circuit
breaker.
Check if the fuse at your fuse box is blown—replace the
fuse.
Check if the System switch at the equipment is in the
Off position—set to the On position.
Wait five minutes for the system to respond (thermostat
displays “ Wait”).
Set System selection to Heat.
See Display or Reset Filter Timer Settings section to
reset timer.
continued
41 69-1536–3
Troubleshooting (Cont)
Symptom Possible Cause Action
Cooling does not
come on.
System on indicator—
for heat, for
cool— is lit, but no
warm or cool air is
coming from the
registers.
Heat or cool turns on
before programmed
time.
System selection is not set to
Cool. Cooling setpoint is
above room temperature.
Heating/cooling equipment
turns on the fan when the
equipment has reached the
preset time or temperature.
Adaptive Intelligent
Recovery™ control is on.
Check that setpoint is below room temperature.
Check if the circuit breaker is tripped—reset the circuit
breaker.
Check if the fuse at the fuse box is blown—replace the
fuse.
Check if the System switch at the equipment is in the
Off position—set to the On position.
Wait five minutes for the system to respond (thermostat
displays “ Wait”).
Set System selection to Cool.
Wait a minute after seeing the or and then
check the registers. If there is no hot or cool air coming
from registers, refer to Heating does not come on or
Cooling does not come on.
Adaptive Intelligent Recovery™ control brings the heat
or cool on early to meet the temperature set for the
programmed period. See Adaptive Intelligent
Recovery™ control section. To disable Adaptive
Intelligent Recovery™ control, contact your local
Heating and Air Conditioning contractor.
42 69-1536–3
WARRANTY
Honeywell 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) year from 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 (at Honeywell’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 retailer from which you purchased it, or
(ii) package it carefully, along with proof of purchase (including date of purchase) and a short description of the malfunction, and mail it, postage
prepaid, to the following address:
Honeywell Return Goods
Dock 4 MN10-3860
1885 Douglas Drive North
Golden Valley, MN 55422
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 by damage 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 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 limitation of incidental or consequential damages, so this limitation may not apply to you.
43 69-1536–3
Warranty (Cont)
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED
WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED
TO THE ONE YEAR DURATION OF THIS WARRANTY. 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 Honeywell Customer Relations, 1985 Douglas Drive North, Golden Valley, MN
55422 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON15-02H, Honeywell Limited/
Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
44 69-1536–3
CUSTOMER ASSISTANCE
After reading this guide, if you have any questions about the operation of your thermostat, please contact the
Honeywell Customer Relations at www.honeywell.com/yourhome or 1-800-468-1502. For service, contact your
local heating and cooling contractor.
45 69-1536–3
FCCID: CFS8DL5800STAT
CANADA: 1748A 12111
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.
FEDERAL COMMUNICATIONS COMMISSION (FCC) STATEMENT
This equipment has been tested to FCC requirements and has been found acceptable for use. The FCC requires the following statement for
your information:
This equipment generates and uses radio frequency energy and, if not installed and used properly; that is, in strict accordance wih the
manufacturer’s instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits
for a Class B computing device in accordance with the specifications in Part 15 of FCC Rules, which are designed to provide reasonable
protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
• If using an indoor antenna, have a quality outdoor antenna installed.
• Reorient the receiving antenna until interference is reduced or eliminated.
• Move the radio or television receiver away from the receiver/control.
• Move the antenna leads away from any wire runs to the receiver/control.
• Plug the receiver/control into a different outlet so that it and the radio or television receiver are on different branch circuits.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user or installer may
find the following booklet prepared by the Federal Communications Commission helpful: "Interference Handbook"
This booklet is available under Stock No. 004-000-00450-7 from the US Government Printing Office, Washington, DC 20402.
The user shall not make any changes or modifications to the equipment unless authorized by the Installation Instructions or User’s Manual.
Unauthorized changes or modifications could void the user’s authority to operate the equipment.
46 69-1536–3
Automation and Control Solutions
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
69-1536–3 G.H. Rev. 11-02 Printed in U.S.A.
www.honeywell.com/yourhome
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