6 9 - 0 7 3 3 - 3
I N S T
P R O
H
M o d e l C T 3 4 0 0 / C T 3 4 5 5
P r o g r a m m a b l e H e a t a n d / o r C o o l
T A
T H
L o w V o l t a g e ( 2 0 t o 3 0 V a c ) T h e O r m o G s t P a R t R a A
W e e k d a y / S a t u r d a y / S u n d a y
TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA
Savings for Once-A-Day
10°F (5°C) decrease
Savings for Twice-A-Day
10°F (5°C) decrease*
Savings for 5°F (3°)
summer increase
30%
28%
26%
24%
22%
20%
18%
16%
14%
12%
10%
8%
6%
4%
2%
Louisville
Portland
Wash., D C
Los Angeles
Minneapolis Edmonton
Calgary
Halifax
Vancouver
Buffalo
Cleveland
Milwaukee
Denver
Des Moines Chicago
Omaha
Salt Lake
City
Boston
Cincinnati
Kansas City Philadelphia
St. Louis
New York
San
Francisco
Dallas
Atlanta
San Diego
St. Paul
Montreal
Ottawa
Regina
Winnipeg
Moncton
North Bay
Quebec
Detroit
Pittsburgh
Indianapolis
Seattle
Columbus
Toronto
St. John's
*Based on 10°F (5°C) decrease—(5°F [3°C] decrease
gives approximately 55 percent of these savings).
M2416A
J.S. Rev. 4-97 ©Honeywell Inc. 1997 Printed in U.S.A. Form Number 69-0733—3
Table Of Contents
STEP 1 Prepare For Installation.................................................................................................... 2
STEP 2 Remove Old Thermostat .................................................................................................. 4
STEP 3 Before You Program ......................................................................................................... 6
Install the Batteries.................................................................................................................... 6
Adaptive Intelligent Recovery™ Selection ............................................................................. 7
STEP 4 Program The Thermostat ................................................................................................. 9
STEP 5 Mount Thermostat Wallplate.......................................................................................... 16
STEP 6 Adjust System On-Time, Clock Display, as Required ................................................ 18
STEP 7 Adjust Fan Operation Switch, as Required.................................................................. 20
STEP 8 Wire Wallplate Terminals ............................................................................................... 21
STEP 9 Mount The Thermostat ................................................................................................... 24
STEP 10 Check Thermostat Operation After Programming and Installing ........................... 25
STEP 11 Set the Fan and System Switches .............................................................................. 28
Troubleshooting Guide ................................................................................................................ 30
Index............................................................................................................................................... 34
Limited One-Year Warranty ......................................................................................................... 36
1
69-0733—3
STEP 1 Prepare For Installation
■ Check Table 1 to make sure this thermostat is compatible with your system. If not, return to retailer.
For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502.
Table 1. Compatibility Chart.
System Type
Compatible with CT3400/3455
Gas—Standing Pilot
Gas—Electronic Ignition
Gas-Fired Boilers
Gas—Millivolt
Oil-Fired Boilers
Oil-Fired Furnace
Electric Furnace
Electric Air Conditioning
Baseboard Electric (120/240 line volt)
Heat Pumps/Multistage Equipment
Yes
Yes
Yes
1
No
1
Yes
Yes
Yes
Yes
No
No
Not compatible with any 120/240 volt circuit.
1
Compatible with 2-wire Honeywell and Taco zone valves. Not compatible with 3-wire zone valves
or 2-wire White Rodgers no. 1361 valves.
Download from Www.Somanuals.com2. All Manuals Search And Download.
69-0733—3
■ Acquire tools and items as needed (below).
CROSS-RECESSED
SCREWDRIVER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED, TO
DRILL HOLES IN WALL
MASKING TAPE, IF
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED, TO STRIP WIRES
NEEDED, TO LABEL WIRES
AS DISCONNECTED FROM
OLD THERMOSTAT
LEVEL, IF NEEDED, TO LEVEL
M878B
THERMOSTAT FOR APPEARANCE
3
69-0733—3
STEP 2 Remove Old Thermostat
■ Test to make certain that your heating and
cooling systems are working properly. If either
does not work, contact your local heating/air
conditioning dealer. To avoid compressor dam-
age, do not operate the cooling system when
outdoor temperature is below 50°F (10°C).
■ Turn off power to system at the furnace, or
at the fuse/circuit breaker panel.
■ Disconnect wires from old thermostat or
subbase. As you disconnect each wire, use
masking tape to label it with the old terminal
designation.Ifthereare
WIRES THROUGH
WALL OPENING
only two wires, they do
not need to be labeled.
Wrap wires around
pencil to keep them
from falling back into
the wall, as shown.
■ Carefully unpack your new thermostat and
wallplate; save package of screws, instructions
and receipt.
M5136
■ Remove the cover from the old thermostat. If
it does not snap off when pulled firmly from the
bottom, check for a screw used to lock on the
cover.
■ Loosen screws holding thermostat to sub-
base, wallplate or wall, and lift away.
Replacing a clock thermostat that has C or
C1 clock terminals?
If you are replacing a Honeywell Chronotherm®
Thermostat, you may find one or two wires that
go to the C or C1 clock terminals on the
Chronotherm® Thermostat wiring wallplate. Do
4
69-0733—3
which programmable thermostats will work with
your system, call Honeywell Customer Assis-
tance at 1-800-468-1502.
notallowthemtotouch, oryoucandamageyour
transformer. Disconnect the wires and wrap
them separately using electrical tape; do not
wrap them together. Place the wires where they
will not interfere with the operation of the new
thermostat. Record the colors and terminal des-
ignation labels of the remaining wires.
Three thermostat wires?
If you have three wires for heating only and can
operate the fan using the fan ON switch, this
thermostat will work with your system. However,
some hot water (zoned) heating systems have
three thermostat wires. The thermostat will not
workwithoutinstallinganisolatingrelayonthese
systems. For details, call Honeywell Customer
Assistance at 1-800-468-1502.
Six or more wires?
If there are six or more wires (excluding clock
wires attached to terminals), you most likely
have a variation of a heat pump or multistage
system. The thermostat is not compatible with
such systems so return the product to the place
of purchase. If you would like information about
5
69-0733—3
STEP 3 BeforeYou Program
If you insert new batteries within 20 to 30 sec-
onds of removing the old ones, you will not have
to reprogram the thermostat. However, if the
display is blank, the batteries are dead or
incorrectly installed. In this case, you will
have to reprogram. See pages 13 through 15
to reprogram. If you do not reprogram, the
Install the Batteries
IMPORTANT: Three AA alkaline batteries are
included with the thermostat. Batteries must
be installed for programming and operation of
the thermostat and heating/cooling system.
factory-prepro-
BACK OF THERMOSTAT
■ Install the batteries in back of the thermostat
as shown, making sure positive (+) terminals all
face toward the right.
grammed
settings will be
in effect, as
shown in
chart on
pages 11
and 12.
As the batteries are running low, a REPL BAT
indicator will flash for 1 to 2 months before bat-
teries run out completely. Replace the batteries
as soon as possible after the indicator starts
flashing.
INSTALL 3 AA ALKALINE BATTERIES AS SHOWN,
POSITIVE (+) TERMINALS TOWARD RIGHT.
M2589
6
69-0733—3
IMPORTANT: Although the thermostat has a
low battery indicator, replace the batteries
onceayeartopreventleakageandtoprevent
the thermostat and heating/cooling system
from shutting down due to lack of battery
power.
Adaptive Intelligent Recovery™
Selection
Before you program your thermostat, you must
decide if you want to leave the thermostat at
the factory-set Adaptive Intelligent Recovery™
setting, or adjust it to conventional recovery. If
youchooseconventionalrecovery, adjustscrew
3A (on the back of the thermostat) by turning out
one turn.
As a precaution when leaving home for longer
thanamonth, changebatteriesbeforeyouleave
topreventsystemfromshuttingdownduetolack
of battery power.
WithAdaptiveIntelligentRecovery™,yourhome
gradually reaches the comfort temperature you
set at the exact time programmed into the ther-
mostattoachievemaximumenergysavingsand
comfort.
Use fresh alkaline batteries; nonalkaline bat-
teries do not last as long, and may leak, causing
damage to the thermostat or the wall surface.
We recommend Energizer® batteries.
7
69-0733—3
More about Adaptive Intelligent Recovery™…
for the thermostat to adjust to the weather, your
lifestyle, home construction and heating/cooling
system.
This thermostat is actually a small but powerful
computer. Whencalculatingtheexacttimetoturn
onyourfurnaceorairconditioner, itconsiders:(1)
air temperature, (2) the temperature of
the wall and (3) when you want the comfort
temperature established.
Withconventionalrecovery,theprogrammedtime
marks the start of the time your furnace or air
conditionercomesontostartrecovery;therefore,
you should program the start time to be earlier
than the desired comfort time. The best starting
time varies as the seasons change, but 30
minutes is a good head start time to use.
During recovery, the thermostat increases the
controltemperaturegraduallyandturnstheequip-
ment on and off several times before reaching
your comfort time to save energy by avoiding
overshooting the comfort temperature. You can
see the current control temperature anytime dur-
ing recovery by pressing the CURRENT SET-
TING key.
NOTE:Ifyouadjustscrew
SET
PT
PM
TUE
DAYTIME
3Aforconventionalre-
covery, a ■ indicator
appears in the lower
INDICATES
THERMOSTAT IS SET FOR
rightcornerofthether-
mostatdisplayasare-
CONVENTIONAL RECOVERY
This smart control learns from experience. Each
day it checks how closely it hit the target and
adjusts the recovery start time accordingly. It
normally takes four to eight days after installation
M2483
minder that you are no longer using the Adap-
tive Intelligent Recovery™ feature.
8
69-0733—3
STEP 4 Program The Thermostat
After the batteries are installed, the thermostat
can be easily programmed in your hand before
it is installed on the wall.
work or school. (This will be a higher tem-
perature during heating season, or a lower
temperature during cooling season.)
DAYTIME is the time period you can set for an
energy-saving temperature while you are
awayatworkorschool.(Thiswillbealower
temperature during heating season, or a
highertemperatureduringcoolingseason.)
EVENING is the time period you want the
house at a comfortable temperature for
activities before bedtime. (Again, higher
heat or lower cool.)
If you would prefer to program the thermostat
after it is installed on the wall, skip to page 16,
and return later to this programming section.
The following personal programming chart
(pages 11 and 12) may be helpful when plan-
ning your program schedule of time and tem-
perature settings for various times of the day.
NIGHT is the time period you can set for an
energy-saving temperature while you are
sleeping. (Again, lower heat or higher cool.
Although for more comfortable sleeping,
some people choose not to raise the cool
temperature during the night.)
Four time periods are available—MORNING,
DAYTIME, EVENING and NIGHT. Each
period has its own setting key.
MORNING is the time period you want the
houseatacomfortabletemperature when
you get up and while you get ready for
9
69-0733—3
You will set one schedule for weekdays, one for
Saturday, and another for Sunday, because
your requirements will probably be different for
each.
Before programming, remove the clear plastic
overlay covering the display.
When pressing the keys, use the ball of your
finger or a soft pencil eraser. Use of sharp finger-
nails or pencil points can damage the keypad.
Fill in the times and temperatures you desire for
weekdays, Saturday, Sunday. The factory-pre-
programmed time and temperature settings are
shown in parentheses. If you decide not to
program the thermostat, it automatically con-
trolsto thesesettings. Thethermostatrequiresa
time and temperature program for the MORN-
ING period. You can program DAYTIME and
EVENING, or leave them blank. You can also
changeNIGHTorcancelit(seepage15),asyou
please.
If at any time during programming you make an
error, just press the RUN PROGRAM key, and
continue again at the step where you left off.
10
69-0733—3
PROGRAMMING
Personal Programming Chart
Weekday Program
1
1
START
TIME
HEATING
COOLING
PERIOD
MORNING
DAYTIME
EVENING
NIGHT
TEMPERATURE
_____________________
TEMPERATURE
(6:00 AM)
(70°F [21°C])
(78°F [26°C])
_____________________
______________
______________
______________
______________
_____________
_____________
(10:00 PM)
(60°F [16°C])
(78°F [26°C])
_____________________
_____________________
_____________________
Saturday Program
HEATING
1
1
START
TIME
COOLING
PERIOD
MORNING
DAYTIME
EVENING
NIGHT
TEMPERATURE
_____________________
TEMPERATURE
_____________________
(6:00 AM)
(70°F [21°C])
(78°F [26°C])
_____________________
______________
______________
______________
______________
_____________
_____________
(78°F [26°C])
_____________________
(10:00 PM)
(60°F [16°C])
_____________________
_____________________
11
69-0733—3
Sunday Program
1
1
START
TIME
HEATING
COOLING
PERIOD
MORNING
DAYTIME
EVENING
NIGHT
TEMPERATURE
_____________________
TEMPERATURE
_____________________
(6:00 AM)
(70°F [21°C])
(78°F [26°C])
_____________________
______________
______________
______________
______________
_____________
_____________
(78°F [26°C])
_____________________
(10:00 PM)
(60°F [16°C])
_____________________
_____________________
1
The temperatures cannot be set any higher than 88°F (31°C) or any lower than 45°F (7°C).
NOTE: The factory-preprogrammed time and temperature settings are shown in parentheses.
12
69-0733—3
PROGRAMMING
When programming your new thermostat, use this guide. Batteries are required for programming
and operation.
SET PRESENT DAY
Set
Press and release
then
then
until present day shows.
Present
Day
Day/Time
SET PRESENT TIME
Press and release
a
Set
Time
until present time shows.
Present
Day/Time
HEATING PROGRAM
With system switch at HEAT, press and release
a
a
Morning
Time
Temp
. Use
and
to
program Mon-Fri MORNING time and temperature. Repeat using DAYTIME, EVENING, NIGHT
keys.
a
Day
Time
Morning
For Saturday, press
a
to SAT. Press and release
; use
and
Temp
to program Saturday morning time and temperature. Repeat using DAYTIME, EVENING,
NIGHT keys.
Day
For Sunday, press
to SUN. Repeat steps as you did for SAT.
13
69-0733—3
COOLING PROGRAM
Thetimesyousetforheatingremainthesameforcooling;youonlyneedtoprogramthetemperatures.
a
Morning
Temp
With system switch at COOL, press and release
. Use
toprogramMon-Fri
MORNING temperature. Repeat using DAYTIME, EVENING, NIGHT keys.
a
Morning
Temp
Day
For Saturday, press
program
to SAT. Press and release
; use
to
Saturday morning temperature. Repeat using DAYTIME, EVENING, NIGHT keys.
Day
For Sunday, press
to SUN. Repeat steps as you did for SAT.
After programming, adjust fan and system switches as desired.
Run
Program
Press and release
a Press on
to start the program.
to move number back; press on
to move number ahead.
14
69-0733—3
PROGRAMMING
For operating or making changes, use this guide.
a
Temp
Temporarily Change temperature for current period only—
; TEMPORARY indicator
shows on display, and cancels itself at next scheduled change. To cancel sooner, you may
Run
Program
press
.
a
Hold
Temp
Temp
Hold a temperature indefinitely (such as on vacation)—
,
Hold appears
Run
Program
on display; to cancel, press
.
Current
Setting
Check current temperature setting—
.
Daytime
Evening
Night
Cancel a program—Press and hold
,
or
three seconds to cancel.
Morning cannot be cancelled (only changed).
Permanently Change a program—Repeat steps under Heating Program (page 13) or Cooling
Program (page 14), as applicable.
Run
Program
Return to normal program or start program—
a Press on
.
to move number back; press on
to move number ahead.
15
69-0733—3
STEP 5 Mount Thermostat Wallplate
■ Position wallplate on wall. Level the wall-
plate for appearance only. Use a pencil to
mark the two mounting holes that best fit the
application.
WALL
WIRES THROUGH
WALL OPENING
WALL
ANCHORS
(2)
MOUNTING
1
HOLES (3)
MOUNTING
SCREWS (2)
WALLPLATE
1
USE THE TWO MOUNTING HOLES THAT BEST FIT APPLICATION.
M5932A
16
69-0733—3
INSTALLATION
■ Remove wallplate from wall, and drill
3/16 inch holes in wall (if drywall) as marked.
For firmer material such as plaster or wood,
drill 7/32 inch holes. Gently tap anchors
(provided) into drilled holes until flush with
the wall.
LEVEL
■ Reposition wallplate over holes, pulling
wires through wiring opening. Loosely insert
two mounting screws into holes.
M611B
■ Level for appearance only; thermostat
functions properly even when not level.
Tighten mounting screws.
17
69-0733—3
STEP 6 Adjust System On-Time, Clock Display,
As Required
■ The thermostat on-time is factory-set for a
warm air, gas or oil heating system. If you are
installing it on another type of system, the on-
time must be adjusted accordingly by setting
screws 1A and 1B on the back of the thermo-
stat, using the heating system table in the
illustration as a guide. The system on-time
should be optimized with the type of system to
minimize room temperature swings. Setting the
screw out one turn means turning the screw
approximately 360° counterclockwise, orabout
one complete turn.
First, turn both screws in completely, then ad-
just for system type:
• Hot Water or High Efficiency—Set at the
GravityAir/Watersetting(1A—outoneturn,
1B—out one turn).
• Gas/Oil Warm Air—Set at the Hot Water or
High Efficiency setting (1A—leave in, 1B—
out one turn).
• Electric Warm Air—Leave at the Gas/
Oil Warm Air setting (1A—leave in, 1B—
leave in).
In the unlikely event that you want longer fur-
nace on-time, readjust screws 1A and/or 1B as
follows:
18
69-0733—3
INSTALLATION
RECOVERY
SELECTION
3A
IMPORTANT: When using a high efficiency
furnace such as a 90% or greater AFUE
(Average Fuel Utilization Efficiency) unit,
leave screw 1A in and screw 1B out one turn.
IN
ADAPTIVE
INTELLIGENTTM
(FACTORY SETTING)
OUT
1 TURN
CONVENTIONAL
BACK OF THERMOSTAT
■ The thermostat is set to display the time as
a 12-hour clock and the temperature in degrees
Fahrenheit. If a 24-hour clock (e.g., military
time) or degrees Celsius readings are desired,
adjust screws 2A and 2B as necessary using
the illustration as a guide.
3A 1A 1B
2A 2B
■ For an explanation of the Recovery Selec-
tion screws (3A), see pages 7 and 8.
1A
1B
2A
2B
SYSTEM
DISPLAY
12 hr./ °F
OUT
OUT
GRAVITY
AIR/WATER
OUT
1 TURN
OUT
1 TURN
(FACTORY SETTING)
HOT
24 hr./ °F
24 hr./ °C
IN
IN
OUT
IN
WATER
OUT
OR HIGH
EFFICIENCY
(90%+AFUE)
IN
IN
1 TURN
IN
GAS/OIL
WARM AIR
12 hr./ °C
OUT
IN
(FACTORY SETTING)
OUT
1 TURN
ELECTRIC
WARM AIR
IN
M 618A
19
69-0733—3
STEP 7 Adjust Fan Operation Switch, As Required
BACK OF THERMOSTAT
■ The thermostat fan operation switch is fac-
tory-set in the left (NON ELEC) position. This is
the correct setting for most systems. If your
system is an electric furnace, set the switch to
the right (ELEC) position. The ELEC position
allows the fan to turn on immediately with the
heating or cooling system if the G terminal is
connected to a fan relay.
NOTE: Either the switch must be set before the
batteries are installed, or the left battery
4A
must be removed to access the switch.
FAN OPERATION SWITCH
(SHOWN IN NON ELEC POSITION)
M619C
20
69-0733—3
INSTALLATION
STEP 8 Wire Wallplate Terminals
NOTE: All wiring must comply with local codes
and ordinances. If unsure about household
wiring procedures, call your local heating/air
conditioning contractor.
■ Loosen the terminal screws and slip each
wire beneath its matching terminal. Either
straight or wraparound wiring connections are
acceptable (see illustration). Tighten terminals.
Refer to masking tape labels you placed on
wires when you removed your old thermostat.
■ Plug the hole in the wall with insulation to
help prevent drafts from adversely affecting
thermostat operation.
■ Match the letter of your old thermostat wire
with the terminal of the corresponding letter on
your new thermostat. Refer to illustrations on
pages 22 and 23.
FOR WRAPAROUND–
STRIP 7/16 IN. (11MM)
FOR STRAIGHT INSERTION–
STRIP 5/16 IN. (8MM)
In 5-wire installations only, be sure to re-
move the factory-installed jumper connect-
ing terminals R and Rc.
M2486
21
69-0733—3
4-WIRE HEAT/COOL (JUMPER INTACT)
2-WIRE HEAT-ONLY (JUMPER INTACT)
THERMOSTAT
THERMOSTAT
R
R
W G
R
C
Y
W G
R
C
Y
HEATING
RELAY OR
VALVE COIL
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
FAN
RELAY
1
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M614A
M612A
22
69-0733—3
Download from Www.Somanuals.com. All Manuals Search AnIdNDoSwTnlAoadL. LATION
3-WIRE HEAT ONLY (JUMPER INTACT)
5-WIRE HEAT/COOL (JUMPER REMOVED)
THERMOSTAT
THERMOSTAT
R
W G
R
C
Y
R
W G
R
C
Y
HEATING
RELAY OR
VALVE COIL
COOLING
CONTACTOR
COIL
HEATING
RELAY OR
VALVE COIL
FAN
RELAY
FAN
RELAY
1
1
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
M 615A
M613A
23
69-0733—3
STEP 9 Mount TheThermostat
AM
MON
DAYTIME
HEAT ON
A.
ENGAGE TABS BETWEEN
TOP OF THERMOSTAT
AND WALLPLATE
B.
PRESS
LOWER EDGE
OF CASE TO
LATCH
C.
SWING COVER OPEN FOR
CHECKOUT AND PROGRAMMING
AM
MON
DAYTIME
HEAT ON
Set
Current
Setting
Present
Day Time
Day
Hold
Temp
Morning
Daytime
Temp
Time
Run
Program
Night
Evening
Heat On Cool
On Auto
Fan
M5143
24
69-0733—3
INSTALLATION
STEP 10 CheckThermostat Operation After Programming
And Installing
HEAT OFF COOL
HEATING
Move the system switch to HEAT and
the fan switch to AUTO.
Do not check heating system operation
by jumpering thermostat terminals at
the primary control, such as the gas
valve, zone valve, oil burner control.
This will damage the thermostat. In-
stead, you could jumper R and W wires
at the thermostat.
ON
AUTO
FAN
Press up arrow of key until the setting is
about 10°F (6°C) above room tempera-
ture. Heating should start and the fan
should run after a short delay (immedi-
ately if fan operation switch is set in
ELEC position).
Temp
M2472
25
69-0733—3
Press down arrow of key until setting is
about 10°F (6°C ) below room tempera-
ture.Theheatingequipmentshouldshut
off.
Temp
M2472
HEAT OFF COOL
COOLING
Move the system switch to COOL and
the fan switch to AUTO.
To avoid possible compressor damage,
do not operate the cooling system when
outside temperature is below 50°F
(10°C). See compressor manufacturer
instructions for further information.
ON
AUTO
FAN
NOTE:Whencoolingsettingischanged,
thermostat may delay up to five min-
utes before turning on the air condi-
tioner. This delay protects the com-
pressor.
Press down arrow of key until setting is
about 10°F (6°C) below room tempera-
ture. The cooling equipment and fan
should start.
Temp
Press up arrow of key until the setting is
about 10°F (6°C) above room tempera-
ture. The cooling equipment and fan
should stop.
Temp
26
69-0733-3
HEAT OFF COOL
Move the system switch to OFF and the
fan switch to ON. The fan should run
continuously. When the fan switch is in
the AUTO position, fan cycles with the
heating or cooling system.
ON
AUTO
FAN
27
69-0733—3
STEP 11 SetThe Fan And System Switches
ON
AUTO
First set the fan switch.
FAN ON: The fan runs continuously. Use for
improved air circulation during special occa-
sions or for more efficient electronic air clean-
ing. (In a heat-only system, fan runs continu-
ously only if fan relay is connected to the
thermostat.)
FAN
ON
AUTO
FAN AUTO: Normal setting for most homes.
A single-speed fan turns on automatically
with the air conditioner or furnace. A two-
speed fan usually runs on high with the air
conditioner and on low with the furnace.
Exception: If fan operation switch on back of
thermostat is set to the ELEC (right) position
(see page 20), fan operates with furnace
only.
FAN
28
69-0733—3
HEAT OFF COOL
HEAT OFF COOL
Then set the system switch.
HEAT: The thermostat controls your heating
system.
OFF: Both the heating and air conditioning
systems are off.
HEAT OFF COOL
COOL: The thermostat controls your air con-
ditioning system.
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Troubleshooting Guide
IF…
THEN…
Display does not come on.
■ Set the system switch to OFF. Remove batteries. Insert back-
ward for at least five seconds to reset thermostat. Replace
batteries correctly. Display should come on.
■ Make sure batteries are fresh and installed correctly.
■ Gently clean battery contacts using a soft pencil eraser. Do not
use anything abrasive on the clips.
Display flashes during
programming.
■ You have reached the temperature setting limit. The setting
range is 45°F to 88°F (7°C to 31°C).
Temperature change occurs ■ Check the program times for the period in question. Be sure
at the wrong times.
that AM and PM indications are correct. Make sure the current
day and time are correct. Reprogram if necessary.
■ If you left the thermostat set for Adaptive Intelligent Recovery™,
the start times will occur before your programmed comfort
periods.
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Heating does not come on.
■ Check that switch on thermostat is set to HEAT.
■ Check the system fuse or circuit breaker and replace or reset if
necessary. If display is blank or displays REPL BAT, install
fresh batteries.
■ Check for correct wiring and good connections.
■ Jumper wires R and W. If heat does not come on, contact your
heating dealer.
■ If temperature setting is higher than current temperature, and
HEAT ON is displayed, contact Honeywell Customer Assis-
tance at 1-800-468-1502.
Cooling does not come on.
■ Check that switch on thermostat is set to COOL.
■ Check the system fuse or circuit breaker and replace or reset if
necessary. If display is blank or displays REPL BAT, install
fresh batteries.
■ Check for correct wiring and good connections.
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■ Jumper wires Rc and Y. If cooling does not come on, contact
your cooling dealer.
■ The thermostat has a built-in time delay on cooling. Allow up to
ten minutes after changing the setting before the air conditioner
starts.
■ Make sure outdoor disconnect is energized (on).
■ If temperature setting is lower than current temperature, and
COOL is displayed, move system switch from COOL to OFF for
ten minutes. After ten minutes, return the switch to the COOL
position. If your air conditioner comes on, this indicates your
compressor may have reached its high limit temperature
protection and shut down. If your air conditioner does not
come on after ten minutes and COOL is displayed, contact
Honeywell Customer Assistance at 1-800-468-1502.
■ If 2- or 4-wire installation, verify that R-Rc jumper is installed.
The house is too warm or
too cool.
■ Press CURRENT SETTING to check the current temperature
setting.
■ If desired, change the temperature setting. See page 15.
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HEAT ON is displayed, but
no heat is coming from
the registers.
■ Allow time for the furnace to heat up and the fan to come on
before checking for heat at the register. Note that on most gas
and oil systems, the fan is not controlled by the thermostat, but
by another control, which may account for the delay.
The system cycle length
is too short or too long.
■ Readjust according to instructions on pages 18 and 19.
The thermostat's current
setting does not match the
display temperature to
within ± 1°.
■ Check that the wiring hole in the wall behind the wallplate has
been plugged with insulation to prevent drafts that might
adversely affect thermostat operation.
■ Be aware that it is normal for the current setting and display
temperature to differ occasionally.
Incorrect room temperature ■ Make sure the hole behind the thermostat is plugged with
showing on thermostat
display.
insulation to help prevent drafts from adversely affecting the
thermostat operation.
■ The thermosat is factory-calibrated and cannot be adjusted.
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Index
Adaptive Intelligent
Set fan switch ....................... 28
Set cooling temperatures ..... 14
Set heating temperatures ..... 13
Setting limits .................... 11,12
Sunday
program ......... 10,11,12,13,14
System switch....................... 29
Switch,fan ............................. 28
Switch, system...................... 29
Table of Contents ................... 1
Temporary program
Fan switch............................. 29
Flashing display ...................... 6
Heating
temperatures ........ 9,11,12,13
Hold temperature .................. 15
MORNING ....................... 13,14
NIGHT ......................... 13,14,15
Operation .............................. 15
Period keys ............................. 9
Personal programming
chart .............................. 11,12
Preprogrammed
schedule ............... 9,10,11,12
Programming steps ......... 13,14
Replacing batteries.............. 6,7
Saturday
Recovery™ ....................... 7,8
Batteries, installation .............. 6
Batteries, replacement ........ 6,7
Blinking display ....................... 6
Canceling programs ............. 15
Change temperature............. 15
Checking current setting....... 15
Clock display ........................ 19
Conventional Recovery ....... 7,8
Cooling
temperatures ........ 9,11,12,14
Current setting ...................... 15
Customer Assistance............ 35
Day........................................ 13
DAYTIME .................... 13,14,15
Energy-saving
changes ........................... 15
Time ...................................... 13
Time period .............. 9,10,11,12
Troubleshooting ..... 30,31,32,33
Warranty ............................... 36
Weekday
program ......... 10,11,12,13,14
Set cooling temperatures ..... 14
Set present day .................... 13
Set present time ................... 13
temperature ......................... 9
EVENING.................... 13,14,15
Fan operation switch ............ 20
program ........... 9,10,11,13,14
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Toll-free Customer Assistance
NOTICE: This equipment is a Class B digital
apparatus, which complies with Canadian
RadioInterferenceRegulations,CRCc.1374.
For all questions concerning this thermostat,
please read and follow the instructions. If addi-
tionalassistanceisneeded, callHoneywellCus-
tomer Assistance toll-free at 1-800-468-1502,
Monday-Friday, 7:00 a.m. - 5:30 p.m., Central
time.
Before you call, please have the following in-
formation available—thermostat model num-
ber and date code, type of heating/cooling sys-
tem (e.g., hot water, warm air, oil, gas, etc.), and
number of wires connected to the thermostat.
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69-0733—3
Limited One-Year 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 Inc.
in Canada: Honeywell Limited/Honeywell Limitee
Product Services ON30
Return Goods Department
1050 Berkshire Lane
Plymouth, MN 55441-4437
155 Gordon Baker Road
North York, Ontario M2H 3N7
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.
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 Customer Assistance Department, Honeywell Inc., 1885 Douglas Dr. N.,
Golden Valley, MN 55422-3992, or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products
ON30 Honeywell Limited/Honeywell Limitee,155 Gordon Baker Road, North York, Ontario M2H 3N7.
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69-0733—3
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