Ademco T8665E WIRELESS THERMOSTAT User Manual 69 1538 T8665C D E EnergyPro Thermostat
Honeywell International Inc WIRELESS THERMOSTAT 69 1538 T8665C D E EnergyPro Thermostat
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USERS MANUAL
69-1538
OWNER’S GUIDE
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved
T8665C,D,E EnergyPro™ Thermostat
69-1538 2
Contents
Introduction .................................................................................................................................... 3
Using this Guide ............................................................................................................................ 4
Thermostat Features ..................................................................................................................... 7
Operating Your Thermostat ........................................................................................................... 11
Setting the Clock ........................................................................................................................... 12
Programming Your Thermostat ..................................................................................................... 25
Replacing the Batteries (T8665C Only) ......................................................................................... 38
Adaptive Intelligent Recovery™ Control ........................................................................................ 40
Troubleshooting (Table 3) .............................................................................................................. 43
Warranty ........................................................................................................................................ 50
Customer Assistance .................................................................................................................... 51
3 69-1538
INTRODUCTION
Congratulations on purchasing your new
EnergyPro™ Thermostat. This exciting new
product is designed to add a new level of
service, energy savings and convenience to
your home comfort system. As part of a larger
system of products and services from your
Energy Utility, your new thermostat allows you
to take advantage of special programs offered
through your Energy Utility. These programs
allow you to further increase your energy
savings beyond the efficiency of a traditional
programmable thermostat.
Although the EnergyPro™ Thermostat can be
used standalone, it is intended to be part of a
communicating system provided by your
Energy Utility.
Read this document thoroughly to take
advantage of the convenience and energy
saving benefits of using this product.
69-1538 4
USING THIS GUIDE
The T8665C,D,E Communicating Thermostat
uses two-way radio frequency (RF) to send and
receive information. This information can be
used to make changes to your thermostat
settings, or settings from your Energy Utility.
The following symbols will help you identify the
features that apply to your system:
—–Tip symbol. Look for helpful
tips throughout this guide
when you see this symbol.
— – Compressor with the word,
Heat Pump, below.These
features are availble when
used with a heat pump.
Keyboard and Display Description
Keyboard
The keyboard is located behind the thermostat
cover. Three frequently used keys: increase ,
decrease , and i key are located next to the
display. See Fig. 1.
Display
The thermostat displays important information
such as day, time, schedule period,
temperature, filter information, system and fan
operation. See Fig. 2.
WARNING: This product operates under
provisions of Part 15 of the FCC Rules.
Modifications to this product not specifically
authorized by Honeywell may void the user’s
authority to operate this device.
80
90
70
60
90
80
70
60
H
EAT PUMP
5 69-1538
Fig. 1. Thermostat keyboard description.
M20893
A
Time Set Program
Run
Program
Hold Temp
Set Current
Day/Time
Day Heat/Cool
Settings
Wake
Fan
System
Copy
Daylight
Time
Leave Return Sleep
INCREASE
RAISES TEMPERATURE SETTING
DECREASE
LOWERS TEMPERATURE SETTING
INFORMATION
DISPLAYS CURRENT HEAT/COOL
TEMPERATURE SETTING, FILYER
STATUS, AND OUTDOOR
TEMPERATURE (WHEN INSTALLED)
.
PROGRAM SCHEDULING
WAKE LEAVE RETURN SLEEP
ENTERS PROGRAMMING MODE
FAN
SELECTS AUTO/ON
SYSTEM
SELECTS HEAT/OFF/COOL (AUTO)
DIGITAL
DISPLAY
S
ET CURRENT DAY/TIME
S
ETS CURRENT
D
AY AND TIME
R
UN PROGRAM
R
ETURNS THERMOSTAT TO
N
ORMAL OPERATING MODE.
P
RESS AND HOLD TO CANCEL
E
NERGY SAVINGS AND
P
RE-HEAT/PRE-COOL MODES
(
MY CHOICE).
HEAT/COOL SETTINGS
SWITCHES BETWEEN HEAT SETPOINTS AND
COOL SETPOINTS WHILE PROGRAMMING
T
IME / TIME
SETS TIME
FORWARD OR BACK
H
OLD TEMP
S
ETS A HOLD TEMPERATURE
S
ETTING AND ACTIVATES
V
ACATION HOLD FEATURE
DAYLIGHT TIME
SELECTS STANDARD TIME
OR DAYLIGHT SAVING TIME
COPY
COPIES SETTINGS FROM ONE DAY TO
ANOTHER DAY FOR QUICKPROGRAMMING
Filter
FILTER
SELECTS FILTER TIMER REMINDER
PERIOD (0, 15, 30, 60, 90, 120 DAYS)
D
AY
S
ETS DAY OF THE WEEK
WAKE
SET WAKE TIMES
AND
TEMPERATURES
LEAVE
SET LEAVE TIMES
AND
TEMPERATURES
RETURN
SET RETURN TIMES
AND
TEMPERATURES
SLEEP
SET SLEEP TIMES
AND
TEMPERATURES
69-1538 6
Fig. 2. Example of thermostat display.
Auto
System
Fan
Off Wait
Wake
Mon
AM
Filter Days
On
DST
TueWedThuFriSat Sun Repl Batt Room
Leave Return Sleep Recovery
Set Program
Set Day/Time
Em Ht Aux Ht
HiMedLo
Critical
Hold for
Temporary
Setting
Em
Heat
M20894
DISPLAYS
EITHER CURRENT
TIME OF DAY OR
PROGRAM TIMES
SHOWS
THERMOSTAT
IS IN THE
SET CURRENT
DAY/TIME MODE
SHOWS
TEMPERATURE
SETTING CHANGED
FOR THIS
PROGRAM
PERIOD
SHOWS TEMPERATURE
DISPLAYED IS THE CURREN
T
SET TEMPERATURE
SHOWS TEMPERATURE
DISPLAYED IS THE CURRENT
ROOM TEMPERATURE
S
HOWS FILTER TIMER
E
XPIRED (TIME TO
R
EPLACE FILTER)
DISPLAYS EITHER ROOM
OR SET TEMPERATURE
SHOWS CURRENT FAN
KEY POSITION ON/AUTO
SHOWS THERMOSTAT IS
CALLING FOR THE FAN
SHOWS SMART
RESPONSE IS OFF
AND CONVENTIONAL
RECOVERY IS ON
SHOWS THAT THERMOSTAT
IS CALLING FOR
SHOWS CURRENT
SYSTEM KEY POSITION
HEAT/OFF/COOL
S
HOWS CURRENT
P
ROGRAM PERIOD
O
R PERIOD BEING
P
ROGRAMMED
S
HOWS CURRENT
D
AY OR DAYS BEING
P
ROGRAMMED
SHOWS WHEN
THERMOSTAT
IS IN THE
PROGRAMMING
MODE
S
HOWS VACATION
H
OLD DURATION
SHOWS SYSTEM ON
DAYLIGHT SAVING TIME
SHOWS ADAPTIVE
INTELLIGENT RECOVERYTM
IS IN EFFECT
SHOWS BATTERIES
NEED REPLACING
SHOWS THERMOSTAT
IS COMMUNICATING
SUCCESSFULLY
SHOWS CRITICAL
PRICE TIER IS ACTIVE
SHOWS ACTIVE
PRICE TIER
(HIGH, MEDIUM OR LOW)
7 69-1538
THERMOSTAT FEATURES
• Adaptive Intelligent Recovery™ 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.
• Set the filter indicator (0, 15, 30, 60, 90, or
120 days) to remind you to change the
filter.
• Information at the press of a button—use
the i (information) key to see the outdoor
temperature (C7089B Outdoor Temper-
ature Sensor optional accessory), the
current setpoints, or the filter status.
• Daylight Time key for quick time changes
between Daylight and Standard time.
• Backlit display for improved readability
(press any key to activate).
• Optional outdoor temperature display—
ask your installer to install an outdoor
temperature sensor to activate this
feature.
• For additional features, see the System
User’s Guide provided by your Energy
Utility or systems provider.
69-1538 8
Special Energy Saving Features
The EnergyPro™ Thermostat supports
Demand Response and Price Response
Programs from your Energy Utility. If you have
any questions concerning the application of this
thermostat or these special programs and
features, please contact your local Energy
Utility.
Demand Response
If your utility offers a Demand Response
Program, this thermostat can be managed by
your utility to reduce your energy consumption
during times of peak demand. When your
thermostat is helping your Energy Utility to
manage energy in your community, the word,
SAVE, is displayed on the thermostat as shown.
If you have any questions about the application
of this thermostat or these special programs
and features, please contact your local Energy
Utility.
Aut
o
System
Fan
Wake DST
Cool
Sat Room
Set Program
Set Day/Time
Em Ht Aux Ht
M20901
9 69-1538
Pre-Cool and Pre-Heat
Your Energy Utility may decide to use the
Pre-cool /Pre-heat feature to slightly raise or
lower your home temperature setting
immediately prior to a Demand Response
event to minimize the effect on your comfort.
When the Pre-heat or Pre-cool option is in
effect, the thermostat displays PrE.
Price Response
If your utility offers a Price Response Program,
this thermostat works with your Energy Utility to
inform you of the rate in effect at any given time
and automatically adjust your energy use for
each rate. The rate in effect is indicated on the
thermostat display as shown (Critical, Hi, Med,
and Lo). This typically involves controlling your
home at a higher temperature during cooling
season and a lower temperature during heating
season to reduce energy consumption.
Aut
o
System
Fan
Wake DST
Cool
Tue Room
Set Program
Set Day/Time
Em Ht Aux Ht
M20902
69-1538 10
Display shows Critical rate in effect.
Display shows High rate in effect.
Display shows Medium rate in effect.
Display shows Low rate in effect.
Aut
o
System
Fan
Wake
AM
DST
Cool
Tue Room
Set Program
Set Day/Time
Em Ht Aux Ht
Critical
M20906
Aut
o
System
Fan
Wake
AM
DST
Cool
Tue Room
Set Program
Set Day/Time
Em Ht Aux Ht
Hi
M20903
Aut
o
System
Fan
Wake
AM
DST
Cool
Tue Room
Set Program
Set Day/Time
Em Ht Aux Ht
Med
M20904
Aut
o
System
Fan
Wake
AM
DST
Cool
Tue Room
Set Program
Set Day/Time
Em Ht Aux Ht
Lo
M20905
11 69-1538
My Choice
There may be times when you need to cancel
an energy-saving event such as Demand
Response, Pre-heat or Pre-cool. Your Energy
Utility may offer a program that incorporates the
My Choice feature. To use My Choice and
cancel an energy-saving event, press and hold
Run Program key for three seconds until the
thermostat displays Done.
If the utility does not offer the My Choice
feature, pressing and holding the Run Program
key will not cancel the energy-saving event.
Call your Energy Utility provider for
further information.
OPERATING YOUR
THERMOSTAT
Your new thermostat saves energy and keeps
you comfortable at the same time. 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
M1459
6
Run
Program
69-1538 12
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 THE CLOCK
Setting Current Day and Time
IMPORTANT
Always press keys with your fingertip
or similar blunt tool. Sharp instruments
like pens and pencil points can
damage keyboard.
On initial powerup or after an extended power
loss, “1:00 PM” flashes on display until a key is
pressed.
1. Press Set Current Day/Time key.
Press Set Current Day/Time key to show information
displayed.
Setting the clock can be controlled as part of
the system using two-way
RF communication; then
the time is automatically
updated.
2. Press Day key until current
day displays.
M1458
0
Mon
PM
80
90
70
60
90
80
70
60
Day
13 69-1538
Mon = Monday, Tue = Tuesday,
Wed = Wednesday,
Thu = Thursday,
Fri = Friday, Sat = Saturday,
Sun = Sunday.
Press Day key to set current day. Example display
shows Tuesday.
3. Press Time ∆ or
Time ∇key until
current time displays.
Tap Set Current Day/Time key to
advance time in
one-hour
increments.
4. Press Run Program key to
return to normal operation.
Press Time ∆ or Time ∇ key to set current time.
Example display shows 8:15 AM.
M1458
1
PM
M1458
2
AM
80
90
70
60
90
80
70
60
80
90
70
60
90
80
70
60
Run
Program
69-1538 14
Daylight Saving Time
NOTE: If current time is Daylight Saving Time,
press Daylight Time key to display
“DST.”
Press Daylight Time key to set Daylight Saving Time.
Pressing Daylight Tiime key more than once in
a five-minute period scrolls
you through various time
options (example: one-hour
earlier or later with or
without DST). Pressing
Daylight Time six times in a
five-minute period returns
you to your original setting.
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.
System selection is for all schedule periods.
M1458
3
AM
80
90
70
60
90
80
70
60
Daylight
Time
15 69-1538
CAUTION
Equipment Damage Hazard.
Can cause permanent damage to the
compressor or other equipment.
To avoid possible compressor damage,
allow compressor to remain off for five
minutes before restarting.
To avoid possible equipment damage,
do not operate cooling when outside
temperature is below 50°F (10°C). See
equipment manufacturer instructions.
Setting System Key
Press the System key until the
desired system (Heat, Off, Cool,
or Auto) displays.
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.
Em.Ht: Emergency heat is controlled as stage 1
heat. The Cooling system is
off. The compressor is de-
energized.
H
EAT PUMP
System
69-1538 16
Setting Fan Key
Press Fan key until desired mode
(On or Auto) displays:
On: Fan operates continuously.
Auto: Fan operates only when heating
or cooling.
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 key until the
desired temperature setpoint displays.
While selecting a temporary setting, only the 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.
M1456
3
Temporary Setting
Fan
17 69-1538
Press the Run Program key to
cancel the temporary temperature
setting before the designated time.
After selecting a temporary setting, the display reads
“Temporary” until cancelled. Example display shows
temporary heat setting of 70° at 6:00 AM.
If or appears under temperature display,
both heating and cooling
setpoints are being
adjusted. Tapping or
key changes both heat and
cool setpoints one degree.
(Press i key after setpoint is
reached to verify setpoints.)
Changing and Holding Temperature
Setting Indefinitely
1. Press Hold Temp key once.
2. Press increase or decrease key to
change temperature setpoint, if desired.
M1456
4
Mon
System
Fan
Hea
t
Auto
AM
Heat
Temporary
80
90
70
60
90
80
70
60
Run
Program
Hold Temp
69-1538 18
NOTE: The Display changes from setpoint to
room temperature after approximately
three seconds.
3. Press Run Program key to
cancel hold.
Press Hold Temp key once to display the thermostat
in Hold mode. Example display shows temporary
heat setting of 60°.
Changing Temperature Setting Until a
Designated Day and Period (Vacation
Hold)
1. Press Hold Temp key twice.
Press Hold Temp key twice to display thermostat in
Vacation mode. Example display shows temporary
heat setting of 60°.
M1456
5
System
Fan
Hea
t
Auto
Heat
Setting
M1483
3
Wake
System
Fan
Hea
t
Auto
Hold for
Heat
Days
Setting
Hold Temp Hold Temp
19 69-1538
IMPORTANT
To cancel Vacation Hold before desig-
nated time, press Run Program key.
2. Press Time ∆ or Time ∇
until desired number of
days (1 to 255 days)
displays.
Press Time ∆ or Time ∇ key to select number of
vacation days. Example display shows 18 vacation
days.
3. Press Wake, Leave, Return or Sleep key
to select the period the Hold ends.
In this example, the Hold ends after the 18th day at the
beginning of the Return period.
4. Press increase or decrease to
adjust temperature setting, if desired.
M1483
4
Wake
System
Fan
Heat
Auto
Hold for
Heat
Days
Setting
M1457
1
System
Fan
Heat
Auto
Wake Leave Return Sleep
69-1538 20
NOTE: Only the heating temperature is used
when System is set to Heat. Similarly,
only the cooling temperature is used
when System is set to Cool. The
thermostat uses both heating and
cooling temperatures when System is
set to Auto.
Press increase or decrease key to select a new
Hold temperature. Example display shows temporary
heat setting of 55°.
5. Press Heat/Cool Settings key
to change between heat and
cool settings.
6. Press increase or decrease to
adjust temperature setting, if desired (for
example, if cool is set to 84°, cooling
equipment operates when room
temperature is above 84°F).
7. Press Run Program to start
over or return display to
normal.
M1457
2
System
Fan
Heat
Auto
Heat/Cool
Settings
Run
Program
21 69-1538
Using the i (Information) Key
The i (information) key provides information at
your fingertips in this sequence of key presses:
• Outdoor temperature (if equipped).
• Current setpoint of mode in use (Heat or
Cool).
• Setpoint of mode not currently in use.
• Filter status.
If filter status is expired, refer to Filter Indicator
section. Sequence of i key presses is:
• Filter status.
• Outdoor temperature (if equipped).
• Current setpoint of mode in use (Heat or
Cool).
• Setpoint of mode not currently in use.
Displaying Outdoor Temperature
Press i key once to display outdoor temperature.
Example display shows outdoor temperature at 50°.
Press i key once to display outdoor temperature
(if equipped).
M2089
6
INFORMATION KEY
Wake Room
System
Fan
Em Heat
Auto
AM
DST
Tue
Outdoor
M2089
7
INFORMATION KEY
69-1538 22
If filter status is expired, press i key twice to
display outdoor temper-
ature. See Filter Indicator
section for instructions on
resetting filter indicator.
Displaying Current Settings
Press i key twice to check current temperature
setpoint. Press i key three times to check
temperature setpoint of mode not currently in
use.
Press i key twice to display current setpoint. Example
display shows cooling setpoint of 75°.
Without outdoor temperature sensor, press
i key once to display current setpoint;
press i key twice for opposite setpoint.
If filter status is expired, press i key three times
to check current temper-
ature setpoint, if equipped
with outdoor sensor.
Cool
M20
898
80
90
70
60
90
80
70
60
80
90
70
60
90
80
70
60
23 69-1538
Filter Indicator
Your thermostat monitors the amount of time
the fan is running and lets you know when to
replace the filter, based on the number of fan
run-time days you select. On expiration,
thermostat displays “Filter.”
One fan run-time day equals 24 fan run-time
hours. (If fan is on only one-
third of the time each day, it
takes three days to deduct
one fan run-time day.)
Setting or Resetting Filter Indicator
Your thermostat comes preset to a 30-day
setting. To change this setting or reset after
filter expiration:
1. Press Filter key to enter Filter
mode.
Press Filter key to display filter information. Example
display shows current fan run time set to 30 days with
filter set to expire in five days.
2. Press and hold Filter key for
at least three seconds to
reset fan run time.
FILTER EXPIRATION INDICATOR
Wake Room
Filter
System
Fan
Em Heat
Auto
AM
DST
Tue
M20899
M1457
7
80
90
70
60
90
80
70
60
Filter
Filter
69-1538 24
Hold down Filter key to reset counter.
3. Press Time ∆ or Time ∇ until desired
number of days display (0, 15, 30, 60, 90,
or 120).
4. Press Run Program key to
return to normal operation.
IMPORTANT
To track time fan is running, you must
select a setting other than 0 (0 means
off). If setting is 0 days, display always
shows “0 Days; 0 Setting” when Filter
key is pressed.
LED Indicators (T8665D Only)
Two LED indicators located on upper right of the
thermostat indicate when a Heat Pump Fault Monitor
or Equipment Monitor signal is sent to the thermostat
from the system. When Heat Pump Fault Monitor
LED indicator lights (red), see Troubleshooting
section.
M17762A
Filter Days
Setting
M1946
7
HEAT PUMP FAULT
MONITOR LED EQUIPMENT
MONITOR LED
Run
Program
25 69-1538
Heat Pump Fault Monitor LED lights red when
heat pump failure is
detected. Switch thermostat
to Em. Ht. and contact you
heat pump service com-
pany. Heating with Em. Ht.
is expensive, so act quickly.
Successful Communication Indicator
The thermostat periodically sends and receives
messages. The small triangle right of the
temperature display indicates the thermostat
successfully communicated with the system
controller installed by your Energy Utility.
PROGRAMMING YOUR
THERMOSTAT
7-Day Program and Operation
Your thermostat is 7-day programmable, which
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.
M1776
3
Mon
System
Fan
Hea
t
Auto
AM
Heat
Temporary
HEAT PUMP
69-1538 26
Program Periods:
WAKE—The program period when you want
the house at a comfortable temperature
when you get up and while you get ready for
work or school. (This is a higher temperature
during heating season and a cooler temper-
ature during cooling season.)
LEAVE—The program period you can set for
an energy saving temperature while you are
away at work or school. This is a lower tem-
perature during heating season, and higher
temperature during cooling season and it
follows the WAKE period.
RETURN—The program period when you
want the house at a comfortable tempera-
ture for activities before bedtime. This is a
higher temperature during heating season
and a cooler temperature during cooling
season and it follows the energy-saving
LEAVE period.
SLEEP—The program period you set for an
energy-saving temperature while you are
sleeping. This is a lower temperature during
heating season and a higher temperature
during cooling season and it follows the
RETURN period.
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.
27 69-1538
Instructions:
1. Write the time you want for each program
period.
2. Write the heating and cooling tempera-
tures you want for each period.
3. Draw a circle around the fan operation
you desire for each period.
Table 1. 7-Day Preprogrammed Schedule.
Day WAKE LEAVE RETURN SLEEP
All Days TIME
FAN
H 70
(21)
6:00 AM
AUTO
C 78
(2.5)
TIME
FAN
H 62
(16.5)
8:00 AM
AUTO
C 85
(29.5)
TIME
FAN
H 70
(21)
6:00 PM
AUTO
C 78
(25.5)
TIME
FAN
H 62
(16.5)
10:00 PM
AUTO
C 82
(28)
69-1538 28
Customizing Your Own 7-Day Schedule
Table 2. Your 7-Day Schedule.
Day WAKE LEAVE RETURN SLEEP
SUN TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
MON TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TUES TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
WED TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
29 69-1538
THURS TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
FRI TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
SAT TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
TIME
FAN
H
AUTO
C
ON
Table 2. Your 7-Day Schedule. (Continued)
Day WAKE LEAVE RETURN SLEEP
69-1538 30
Programming the First Day
To modify the preprogrammed schedule, start
by programming the Wake time and temper-
ature and fan operation for any one day.
1. Press the Wake key.
Press Wake key to enter program mode. Example
display shows 6:00 AM Tuesday with Heat set to
70°F.
2. Press Day key until desired
day displays.
Press Day key to select day to program. Example
display shows Monday is selected and ready to
program.
3. Press Time ∆ or Time ∇ key until desired
Wake time displays.
M1458
6
System
Fan
Heat
Auto
AM
M1458
8
Set Program
Mon
Wake
System
Fan
Heat
Auto
AM
Heat
Setting
Wake
Day
31 69-1538
Press the Time ∆ or Time ∇ key to select time Wake
period will begin. Example display shows Wake
period will begin at 6:30 AM.
The program times are in fifteen-minute
intervals; for example, 8:00,
8:15, 8:30.
4. Press increase or decrease until
desired Wake temperature displays.
Press increase or decrease key to select
temperature for Wake period. Example display
hows heating Wake period set for 68°.
Setpoint temperature range is 40° to 90°F
(4° to 32°C) for heating;
55° to 99°F (13° to 37°C)
for cooling.
M1458
9
Set Program
Mon
Wake
System
Fan
Heat
Auto
AM
Heat
Setting
M1459
0
Set Program
Mon
Wake
System
Fan
Heat
Auto
AM
Heat
Setting
80
90
70
60
90
80
70
60
80
90
70
60
90
80
70
60
69-1538 32
5. Press Fan key to modify fan
operation. Selecting Auto
means fan runs only when
heating or cooling equipment is operat-
ing. Selecting On means fan runs contin-
uously for entire schedule period.
6. Press Heat/Cool Settings
key to make selections for
opposite system setting
(either Heat or Cool).
Press Heat/Cool Settings key to select cooling
system (if you previously set heating temperature).
Current setting displays. Example display shows
cooling system previously set for 78°.
M1459
1
Set Program
Mon
Wake
System
Fan
Heat
Auto
AM
Cool
Setting
Fan
Heat/Cool
Settings
33 69-1538
7. Press increase or decrease key until
desired temperature setpoint displays.
Press increase or decrease to select cooling
Wake temperature. Example display shows cooling
Wake period set for 76°.
8. Press Leave, Return or Sleep and repeat
steps 3 through 6 to program entire day.
The day (first day of a 7-day schedule) is
now programmed.
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.
Copying a Day
The thermostat must be in program mode to
use the copy feature. Go to
step 2 if the thermostat is
already in program mode
(set program displays in
upper left corner).
M14592
Set Program
Mon
Wake
System
Fan
Heat
Auto
AM
Cool
Setting
80
90
70
60
90
80
70
60
Leave Return Sleep
Run
Program
69-1538 34
1. Press Wake, Leave, Return or Sleep key
to enter program mode.
2. Press Day key to select the
day to copy from.
Press Day key to select the day schedule to copy.
Example display shows thermostat in program
mode with Monday ready to be copied.
3. Press Copy key.
Press Copy key to copy a day schedule into memory.
Example display shows Monday schedule was coped
into memory.
4. Press Day key until day to be
copied to is displayed.
M1459
0
Set Program
Mon
Wake
System
Fan
Heat
Auto
AM
Heat
Setting
M1459
4
Mon
Wake Return Sleep
Leave
Day
Copy
Day
35 69-1538
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.
Press Copy key again to complete copy command.
Example display shows “donE”. Monday schedule
was successfully copied to Wednesday (Monday and
Wednesday now have the same schedule).
NOTE: “donE” displays for two seconds
before the normal display returns.
6. Repeat steps, as necessary, for all peri-
ods and days desired.
7. Press Run Program key to
return to normal operation.
M1459
5
Mon Wed
M1459
6
Copy
Run
Program
69-1538 36
Clearing a Program Period
Thermostat must be in program mode to use
clear feature. Go to step 2 if
thermostat is already in
program mode (Set
Program displays in upper
left corner.
1. Press Leave, Return or Sleep key to
enter program mode.
Press Leave, Return, or Sleep to enter the
program mode. Example display shows 8:00 AM on
Monday in Leave period with Heat set for 62°.
2. Press Day key until desired
day displays.
Press Day key to select the day to begin clearing the
periods. Example display shows Saturday is selected.
M1459
7
Set Program
Mon Leave
System
Fan
Heat
On
AM
Heat
Setting
M1459
8
Set Program
Leave
System
Fan
Heat
On
AM
Heat
Sat
Setting
80
90
70
60
90
80
70
60
Leave
Return
Sleep
Day
37 69-1538
3. Press and hold Leave, Return or Sleep
key until start time and temperature set-
ting clear (approximately three seconds).
Press and hold Leave, Return or Sleep key to clear
the period for that day. Example display shows
Saturday Leave period cleared.
NOTE: Wake cannot be cleared.
You do not have to program a replacement time
for the remaining periods;
for example, Wake and
Sleep. If you clear only
Leave and Return periods
for Saturday (or any day),
thermostat remains in Wake
period for all of Saturday
until Sleep period.
4. Repeat steps, as necessary, for all
periods to be cleared.
5. Press Run Program key to
return to normal operation.
M1459
9
Set Program
Leave Heat
Sat
Setting
80
90
70
60
90
80
70
60
Run
Program
Leave Return Sleep
69-1538 38
REPLACING THE BATTERIES
(T8665C ONLY)
IMPORTANT
Three AA alkaline batteries are
included with the thermostat. Batteries
must be installed for programming and
operation of the thermostat and the
heating/cooling system.
1. Install batteries in wallplate so positive
terminals all point up (as shown).
2. If the thermostat is already mounted on
the wall, remove the thermostat by
placing your thumb between the
thermostat and wallplate and pulling the
thermostat up and away as shown on the
next page.
M1062
2
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
WALLPLATE
B
RRCOWYG
Day
39 69-1538
3. When batteries are running low, a REPL
BAT message flashes for one to two
months before batteries run out com-
pletely. Replace batteries as soon as pos-
sible after message flashes.
MPORTANT
Although thermostat has a low battery
indicator, replace batteries yearly to
prevent leakage and thermostat and
heating/cooling system from shutting
down due to lack of thermostat battery
power.
4. If you insert new batteries within 20 to 30
seconds of removing old batteries, the
system retains current time and day. If the
display is blank, batteries are dead or
installed incorrectly. You must reset time
and day. See Setting the Clock section.
As a precaution, when leaving home for longer
than a month, change
batteries before leaving to
prevent system shutting
down due to lack of power.
M16424
80
90
70
60
90
80
70
60
69-1538 40
Always use fresh alkaline batteries. Non-
alkaline batteries do not last as long and can
leak, causing damage to the thermostat and
wall surface.
ADAPTIVE INTELLIGENT
RECOVERY™ 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 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™ 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 continuously until the comfort
temperature you choose is reached without
overshooting the setting. This saves energy.
41 69-1538
How do you know when the system is in
recovery? The thermostat displays “Recovery”
whenever the thermostat activates Adaptive
Intelligent Recovery™ control. (See display.)
“Recovery” displays during recovery time from
Sleep to Wake and from Leave to Return.
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. 3, Adaptive Intelligent Recovery™
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.
Aut
o
System
Fan
Wake
Mon
AM
Room
Recovery
Set Program
Set Day/Time
Em Ht Aux Ht
Heat
M20895
69-1538 42
Fig. 3. Explanation of Adaptive Intelligent Recovery™ control.
At 4:00 AM
Recovery Begins
At 5:00 AM
Recovery
Continues
At 6:00 AM
Recovery
Continues
At 7:00 AM System
Operating in Comfort Mode
ENERGY
SAVINGS
PERIOD
RECOVERY FROM ENERGY SAVINGS COMFORT
PERIOD
TIME
TEMPERATURE
T
HE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON
.
M19473
Mon Sleep Room
System
Fan
Heat
Auto
AM
Recovery
Mon Sleep Room
System
Fan
Heat
Auto
AM
Recovery
Mon Sleep Room
System
Fan
Heat
Auto
AM
Recovery
Mon
Wake Room
System
Fan
Heat
Auto
AM
IF In Recovery IS DISPLAYED, PRESS TO SEE THE COMFORT SETPOINT.
1
1
43 69-1538
TROUBLESHOOTING (TABLE 3)
Table 3. Troubleshooting.
Symptom Possible Cause Action
Display does not
come on.
Thermostat is not being
powered.
Check if the thermostat is mounted and
latched on the wallplate—mount and latch
the thermostat on the wallplate.
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 System switch at equipment is in
the Off position—set to On position.
Check if batteries are correctly installed—
be sure they are fresh and installed
correctly. Replace them, if necessary.
69-1538 44
Temperature
setting does not
change (Example:
cannot set the
heating higher or
the cooling lower).
The upper or lower
temperature limits were
reached.
Check that the temperature setpoints are
Heating: 40 to 90° (4.5 to 32 °C).
Cooling: 45 to 99° (7 to 37 °C).
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
45 69-1538
Heating does not
come on.
The thermostat is part of a
Demand Response event.
No power to thermostat.
System selection is not set
to Heat.
Heating setpoint is below
room temperature.
If thermostat indicates SAVE, wait until
energy saving event is complete. To
cancel energy saving event, if available,
press and hold Run Program.
Check that setpoint is above room
temperature.
Check if circuit breaker is tripped—reset
circuit breaker.
Check if fuse at fuse box is blown—
replace fuse.
Check if System switch at equipment is in
Off position—set to On position.
Wait five minutes for System to respond
(thermostat displays “Wait”).
Set System selection to Heat.
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
69-1538 46
Cooling does not
come on
The thermostat is part of a
Demand Response event.
No power to thermostat.
System selection is not set
to Cool.
Cooling setpoint is above
room temperature.
If thermostat indicates SAVE, wait until
energy saving event is complete. To
cancel energy saving event, if available,
press and hold Run Program.
Check that setpoint is below room
temperature.
Check if circuit breaker is tripped—reset
circuit breaker.
Check if fuse at fuse box is blown—
replace fuse.
Check if System switch at equipment is in
Off position—set to On position.
Wait five minutes for System to respond—
(thermostat displays “Wait”).
Set System selection to Cool.
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
47 69-1538
System on
indicator—
for heat;
for cool—
is lit, but no warm
or cool air is
coming from the
registers.
Heating/cooling equipment
turns on the fan when the
equipment has reached the
preset time or temperature.
Wait a minute after seeing the
or and then check the registers.
Heat Pump Fault
Monitor LED is
lighted.
The heat pump signaled the
thermostat to indicate a
problem.
Move the System switch to Em. Ht setting
(heat pump only). See Heat pump
Operating Instructions or call your local
heat pump dealer or Energy Utility for
assistance.
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
69-1538 48
Room temperature
is cooler than
current setting and
air conditioner is
still running.
Thermostat is operating in
Pre-cool mode. If the
thermostat displays PrE,
wait until the Pre-cool event
is complete.
To cancel, press and hold
Run Program for three
seconds until DONE is
displayed.
If PrE does not display, contact your local
heating contractor or Energy Utility.
Outdoor
temperature is not
displayed or is
incorrect.
Installer did not activate this
option.
Outdoor sensor is connected
incorrectly.
Filter expired.
Contact installer or service technician.
Press i key twice for outdoor temperature
when filter expiration shows on display.
Refer to the Filter Indicator section.
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
49 69-1538
1COM is displayed. The thermostat is unable to
communicate with Energy
Utility management system
controller.
Contact your energy utility for assistance.
Heat or cool turns
on before
programmed time.
Adaptive Intelligent
Recovery™ control is 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 you local Heating and Air
Conditioning contractor.
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action
69-1538 50
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 where 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.
51 69-1538
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. In Canada, write Retail
Products ON15-02H, Honeywell Limited/Honeywell Limitée,
35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
CUSTOMER ASSISTANCE
After reading this guide, if you have any
questions about the operation of your
thermostat, please visit the Honeywell website
at www.honeywell.com/yourhome. For service,
contact your Installer or Energy Utility company
or service provider.
69-1538 G.H. 04-03 Printed in Taiwan R.O.C. www.honeywell.com/yourhome
Automation and Control Solutions
Honeywell International Inc. Honeywell Limited-Honeywell Limitée
1985 Douglas Drive North 35 Dynamic Drive
Golden Valley, MN 55422 Scarborough, Ontario
M1V 4Z9