Honeywell CT3650
PROGRAMMABLE THERMOSTAT
OWNER’S GUIDE
Seven Day
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac) Thermostat and Wallplate
Model CT3650
Para pedir estas instrucciones en español, llame al 1-800-468-1502.
Pour obtenir ce ode demploi en français, composer le 1-800-468-1502.
Table of Contents
Step 1. Prepare for Installation ...................................................................................................................................
Step 2. Remove Old Thermostat ................................................................................................................................
Step 3. Mount thermostat Wallplate ...........................................................................................................................
Step 4. Wire Wallplate Terminals ................................................................................................................................
Step 5. Install the Batteries ........................................................................................................................................
5
6
7
8
9
Step 6. Mount the Thermostat .................................................................................................................................... 10
Step 7. Customize Your Thermostat ........................................................................................................................... 11
Step 8. Set the Clock .................................................................................................................................................. 13
Step 9. Programming ................................................................................................................................................. 13
Step 10. Operating Your Thermostat .......................................................................................................................... 17
Step 11. Set the Fan and System Key ....................................................................................................................... 18
If You Have a Problem ................................................................................................................................................ 19
Smart Response™ Technology .................................................................................................................................. 20
Wiring Diagrams ......................................................................................................................................................... 21
Place Bar Code Here
® U.S. Registered Trademark
Copyright © 2001 Honeywell •
•All Rights Reserved
69- 1285- 2
TIME /TIME
SETS TIME
FORWARD OR BACK
DIGITAL DISPLAY
RAISES
TEMPERATURE SETTING
SET CURRENT
DAY/TIME
SETS CURRENT
TIME AND DAY
LOWERS
TEMPERATURE SETTING
DISPLAYS
CURRENT HEAT/COOL
TEMPERATURE SETTING
RUN PROGRAM
RETURNS
THERMOSTAT
TO NORMAL
OPERATING MODE
Time
Set Program
Leave
PROGRAM PERIODS
WAKE/LEAVE/RETURN/SLEEP:
ENTERS PROGRAMMING MODE
Set Current
Day/Time
Run
Program
Wake
Return
Sleep
HOLD TEMP
SETS A HOLD
TEMPERATURE
SETTING AND
ACTIVATES
Heat/Cool
Settings
Hold Temp
Day
HEAT/COOL SETTING
SWITCHES BETWEEN
HEAT SETPOINTS AND
COOL SETPOINTS
Daylight
Time
Copy
Fan
System
VACATION HOLD
FEATURE
WHILE PROGRAMMING
SYSTEM KEY
SELECTS HEAT/OFF/COOL
DAYLIGHT TIME
SELECTS STANDARD
TIME OR DAYLIGHT
SAVINGS TIME
FAN KEY
SELECTS AUTO/ON
COPY
COPY SETTINGS FROM ONE DAY TO
ANOTHER DAY FOR QUICK PROGRAMMING
DAY
SETS DAY OF THE WEEK
M18596
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69-1285—2
DISPLAYS EITHER CURRENT
TIME OF DAY OR PROGRAM TIMES
SHOWS THERMOSTAT IS IN
THE SET DAY/TIME MODE
SHOWS WHEN
THERMOSTAT IS IN THE
PROGRAMMING MODE
SHOWS TEMPERATURE SETTING
CHANGED FOR THIS PROGRAM PERIOD
SHOWS VACATION
HOLD DURATION
SHOWS THE TEMPERATURE
DISPLAYED IS THE CURRENT
SET TEMPERATURE
Temporary Setting
Set Program
Hold for
Em Ht
Set Day/Time
AM
SHOWS CURRENT
DAY OR DAYS BEING
PROGRAMMED
Room
Humid
SHOWS THE TEMPERATURE
DISPLAYED IS THE CURRENT
ROOM TEMPERATURE
Aux Ht
MonTueWedThuFriSatSun Days
WakeLeaveReturnSleep
System
Outdoor
In Recovery Filter
DST
Fan
Wait On Auto
Repl Batt
SHOWS CURRENT
PROGRAM PERIOD
OR PERIOD BEING
PROGRAMMED
SHOWS THE BATTERIES ARE
LOW AND MUST BE
REPLACED
Heat
Off Cool
Auto
Em
DISPLAYS EITHER ROOM
OR SET TEMPERATURES
SHOWS CURRENT
SYSTEM KEY POSITION
HEAT/OFF/COOL
SHOWS CURRENT FAN
KEY POSITION ON/AUTO
SHOWS THAT THERMOSTAT IS
"CALLING" FOR HEAT OR COOL
SHOWS THERMOSTAT IS
CALLING FOR THE FAN
SHOWS SYSTEM ON DAYLIGHT SAVINGS TIME
SHOWS THERMOSTAT IS PROCESSING
SHOWS SMART RESPONSE IS OFF.
CONVENTIONAL RECOVERY IS ON
INFORMATION AND WAITING TO CALL FOR HEAT OR COOL
SHOWS SMART RESPONSE IS CHANGING
THE TEMPERATURE TO MEET THE
CURRENT PROGRAMS
M18636
69-1285—2
4
STEP 1. PREPARE FOR INSTALLATION
❑ Check Table 1, the compatibility chart, to make sure the thermostat is compatible with your system. If your system
is not compatible, call Honeywell Customer Relations Center, toll-free, 1-800-468-1502.
Table 1. Compatibility Chart.
System Type
Compatibility with CT3650
Yes
Gas — Standing Pilot
Gas — Electronic Ignition
Gas-fired Boilers
Yes
Yesa
Yes
Gas — 750 Millivolt Heat
Yesa
Yes
Yes
Yes
No
Oil-Fired Boilers
Oil-Fired Furnace
Electric Furnace
Electric Air Conditioning
Baseboard Electric (120/240 line volt)b
Single Stage Heat Pump
Yes
No
Multistage Heat Pumps/Multistage Equipment
a
Compatible with 2-wire Honeywell and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White
Rodgers no. 1361 zone valves.
Not compatible with any 120/240 volt system.
b
Package Contents
•
•
•
Thermostat
Screws and anchors
3 Energizer® AA batteries
•
•
•
Wallplate
Wiring labels
Owners manual
Tools Required
•
•
Screwdriver
Drill
5
69-1285—2
STEP 2. REMOVE OLD THERMOSTAT
❑ Test your heating and cooling systems to make sure they work properly. If either system does not work, contact
your local heating/air-conditioning dealer. To avoid compressor damage, do not operate the cooling system when
outdoor temperature is below 50°F (10°C).
❑ Turn off power to the system at the furnace or the fuse/circuit breaker panel.
❑ Carefully unpack your new thermostat and wallplate. Save package of screws, instructions, and receipt.
❑ Remove the cover from the old thermostat. If the cover does not snap off when pulled firmly from the bottom, check
for a screw or screws used to lock on the cover.
❑ Loosen the screw or screws holding the thermostat to the wallplate and lift the thermostat away.
❑ Disconnect the wires from the old thermostat. As you disconnect each wire, attach the enclosed labels with the old
terminal designation. If there are only two wires, they do not need to be labeled. Wrap the wires around a pencil as
shown to keep them from falling back into the wall.
Special Installations
Read this section if you are replacing:
WIRES THROUGH
WALL OPENING
•
•
•
Clock thermostat with separate wires for the clock.
Thermostat with six or more wires connected to it.
Thermostat in a heating only system with three wires.
M5136
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 going to the C or C1 clock
terminals on the Chronotherm wiring wallplate. Do not allow them to touch, or you can damage the 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 designation
labels of the remaining wires.
Replacing a Thermostat that has Six or More Wires
If there are six or more wires (excluding clock wires attached to terminals), you probably have a variation of a
multistage heat pump or other multistage system. This thermostat is not compatible with multistage systems, so return
the product to the place of purchase. For information about which programmable thermostats will work with your
system, call Honeywell Customer Relations Center, at 1-800-468-1502.
Replacing a Thermostat that has Three Wires
If you have three wires for a heating only system and can operate the fan using the fan ON switch this thermostat works
with your system. However, some hot water (zoned) heating systems also have three wires. Your thermostat will work
only if you install an isolating relay on these systems. For details, call your local heating and/or cooling contractor.
69-1285—2
6
STEP 3. MOUNT THERMOSTAT WALLPLATE
❑ Separate the wallplate from the thermostat by placing your thumb or fingers
between the bottom of the wallplate and the thermostat, and pulling the
wallplate up and away from the thermostat. See illustration at right.
❑ Position the wallplate on the wall. Level the wallplate for appearance if desired.
Use a pencil to mark the two mounting holes that best fit the application.
❑ Remove the wallplate from the wall. Drill two 3/16 in. holes in wall (if drywall) as
shown. For materials such as plaster or wood, drill 7/32 in. holes where marked.
Gently, tap the (provided) anchors into the drilled holes until they are flush with
the wall.
❑ Reposition the wallplate over the holes. Pull the wires through the wiring
opening. Loosely insert mounting screws into each of the holes.
❑ Level the wallplate if desired. Thermostat functions properly when not level.
❑ Tighten mounting screws.
M16427
WALL
WIRES
THROUGH WALL
WALL
ANCHORS (2)
MOUNTING
HOLES
MOUNTING
SCREWS
M15044
7
69-1285—2
STEP 4. WIRE WALLPLATE TERMINALS
IMPORTANT
All wiring must comply with local codes and ordinances. If
unsure about household wiring procedures, call your local heat-
ing/air-conditioning contractor.
Refer to the labels you placed on the wires when you removed the old
thermostat (see illustration).
❑ Match the letter of your old thermostat wire with the corresponding
terminal letter on your new thermostat. Refer to Table 2.
❑ Remove the factory-installed jumper connecting terminals R and RC if
wires are connected to both of those terminals.
❑ For wiring diagrams, if needed, see pp 21-22.
❑ Loosen the terminal screws. Slip each wire beneath its matching
terminal. Wraparound and straight connections are both acceptable,
(see illustration). Tighten the terminals.
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
M16425
M4826
❑ Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation.
69-1285—2
8
Table 2. Terminal Designations on Old and New Thermostats.
Terminal on Old Thermostat Connect To Description
R, RHa, 4, V
R
Power
Rc, Ra
W, W1, H
Y, Y1, M
G, F
Rc
Power for cooling
W
Y
Heat
Cooling
G
O
Fan
O
Changeover in cool. (Single stage heat pump only).
Changeover in heat. (Single stage heat pump only).
Bb
Bb
Cc, Xc, Bb
W2, H2
Y2
Do not connect.
Transformer common
Do not continue installation. Second stage heat.
Call 1-800-468-1502.
Second stage cool.
a
If both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc.
Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B.
Tape off end of the wire with electrical tape and push the taped wire back into the wiring hole in the wall.
b
c
WALLPLATE
STEP 5. INSTALL THE BATTERIES
B
R
IMPORTANT
Three AA alkaline batteries are included with the thermo-
stat. Batteries must be installed for programming and opera-
tion of the thermostat and the heating/cooling system.
RC
O
W
Y
G
❑ Install the batteries in the wallplate so the positive terminals all
point up (see illustration).
❑ 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.
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
M10622
9
69-1285—2
When the batteries are running low, a REPL BAT message flashes for one to
two months before the batteries run out completely. Replace the batteries as
soon as possible once the message flashes.
IMPORTANT
Although the thermostat has a low battery indicator, replace the
batteries once per year to prevent leakage and to prevent the ther-
mostat and heating/cooling system from shutting down due to lack
of battery power in the thermostat.
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 Set the Clock for instructions.
M16424
As a precaution when leaving home for longer than a month, change batteries 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.
STEP 6. MOUNT THE THERMOSTAT
A. ENGAGE TABS AT TOP
OF THERMOSTAT
AND WALLPLATE.
B. PRESS LOWER
EDGE OF CASE
TO LATCH.
M12703
69-1285—2
10
STEP 7. CUSTOMIZE YOUR THERMOSTAT
Your Honeywell CT3650 thermostat comes preset to the most commonly used settings. The settings are:
Gas or oil forced air furnace.
Smart Response technology on.
Temperature °F.
12-hour clock format.
You can change any or all of these settings.
IMPORTANT
Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil
points can damage the keyboard.
❑ Press and hold down
,
, and
, simultaneously until the screen shows.
You now can change any of these settings.
Fan Operation (Feature Number 2)
Fan operation options are:
OPTION
M13347
FEATURE
NUMBER
0 = Gas or oil furnace. Furnace controls fan operation during heating (preset).
1 = Electric furnace or single stage heat pump. Thermostat controls fan operation during heating.
To change fan operation:
❑ Press
once.
Run
Program
❑ Press Time
to move to next feature or
to return to main display.
System Type (Feature Number 4)
System type options are:
1 = Gravity or steam system.
3 = Hot water, high efficiency furnace (90% or better), or single stage heat pump.
6 = Gas or oil forced air furnace (preset).
M13348
9 = Electric furnace.
To change your system type:
❑ Press
until display shows your furnace or boiler type.
11
69-1285—2
Run
Program
❑ Press Time
to move to next feature or
to return to main display.
Smart Response™ Technology (Feature Number 13)
Smart Response technology options are:
0 = Smart Response technology on (preset).
1 = Smart Response technology off.
M13343
To turn Smart Response technology on or off:
❑ Press
once.
Run
Program
❑ Press Time
to move to next feature or
to return to main display.
NOTE: See Smart Response technology (page 20) for information about this feature.
Temperature Format (Feature Number 14)
Temperature format options are:
0 = °F (preset).
1 = °C.
M13344
To change temperature format:
❑ Press
once.
Run
Program
❑ Press Time
to move to next feature or
to return to main display.
Time Format (Feature Number 16)
Time format options are:
0 = 12-hour clock (preset).
1 = 24-hour clock.
M13345
To change time format:
❑ Press
❑ Press
once.
Run
Program
to return to main display.
69-1285—2
12
Factory Set Function (Feature Number 37)
Do not change this setting.
M13346
STEP 8. SET THE CLOCK
Set Current Day and Time
NOTE: On initial power-up, the screen flashes 1:00 pm until you press a key.
Set Current
Day/Time
❑ Press
❑ Press
.
Day
until screen shows current day.
or until screen shows current time. (Tapping the
Set Current
Day/Time
❑ Press Time
will advance the time in one
hour increments).
Daylight
Time
❑ Press
❑ Press
until “DST” displays if daylight savings time is in effect.
Run
Program
.
STEP 9. PROGRAMMING
The keyboard is located behind the thermostat cover. The three most frequently used keys are near the display.
Pressing displays the current temperature settings. Pressing the and keys change the temperature. The
thermostat displays day, time, program period, temperature, system and fan settings.
There is an individual key for each of the four 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 the heating season and a lower
temperature during the 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 temperature during the heating season and a higher temperature during the cooling
season).
13
69-1285—2
Return
Sleep
—The program period when you want the house at a comfortable temperature for activities before bedtime.
(This is a higher temperature during the heating season and a lower temperature during the cooling
season).
—The program period you can set for an energy-saving temperature while you sleeping. (This is a lower
temperature during the heating season and a higher temperature during the cooling season).
Table 3 can be helpful when planning your schedule of time and temperature settings. The thermostat default settings
are shown in parentheses ( ).
Table 3. Personal Programming Table.
Monday
(Mon)
Tuesday Wednesday Thursday Friday
(Tue) (Wed) (Thu) (Fri)
Saturday Sunday
(Sat) (Sun)
Period
Default Setting
Wake
Time (6:00AM)
Heata (70°F/21°C)
Coolb (78°F/25.5°C)
Leave
Return
Sleep
Time (8:00AM)
Heata (62°F/16.5°C)
Coolb (85°F/29.5°C)
Time (6:00PM)
Heata (70°F/21°C)
Coolb (78°F/25.5°C)
Time (10:00PM)
Heata (62°F/16.5°C)
Coolb (82°F/28°C)
a
b
Your heating setpoints cannot be higher than 90°F (32°C) or lower than 40°F (4.5°C).
Your cooling setpoints cannot be higher than 99°F (37°C) or lower than 45°F (7°C).
69-1285—2
14
Program the First Day
Start by programming the wake time and temperature for one day.
Wake
❑ Press and release
.
Day
❑ Press
until the desired day displays. (Mon, Tue, Wed, Thu, Fri, Sat, Sun)
or until the desired time shows in the display.
❑ Press time
NOTE: Program times are in 15 minute intervals. For example, 8:00, 8:15, 8:30.
❑ Press or until the desired wake temperature displays.
The setpoint temperature range is 40°F to 90°F (4.5°C to 32°C) for heating and 45°F to 99°F (7°C to 37°C) for cooling.
Heat/Cool
Settings
❑ Press
to switch between setpoints.
NOTE: Program times are the same for heating and cooling.
❑ Press or until the display shows the desired temperature setpoint.
NOTE: You can program the fan to On or Auto for each program period. Setting Fan to On runs the system fan
continuously in the program periods.
Fan
❑ Press
❑ Press
until the fan is at the desired setting (On or Auto).
or and repeat these steps for each program period. The first day is now programmed.
Leave
Sleep
Return
,
❑ Repeat each step in Program the First Day for the rest of the week.
NOTE: After the first day is programmed, you can copy that day to any other day using procedure in Copy a Day.
Run
Program
❑ Press
when the entire week is programmed.
15
69-1285—2
Copy a Day
Your thermostat can copy program settings from one day to another.
Wake
Leave
Return
Sleep
❑ Press
❑ Press
❑ Press
,
,
or
to enter programming mode.
Day
until the display shows the day you want to copy.
Copy
. The display shows.
Mon
M13327
M13328
M13329
Day
❑ Press
❑ Press
until the display shows the day you want to copy to.
to accept the change.
Mon
Wed
Copy
❑ Repeat these steps for each day you want to copy.
NOTE: donE appears for two seconds and then the normal program display appears.
Clear a Program Period
NOTE: Wake cannot be cleared.
Leave
Sleep
Return
❑ Press
❑ Press
,
, or
for the program period you want to clear.
Day
until the desired day displays.
Leave
Sleep
Return
❑ Press and hold the
,
, or
for approximately 3 seconds until the time and temperature clear.
❑ Repeat the above steps for each period to be cleared.
Run
Program
❑ Press
.
69-1285—2
16
STEP 10. OPERATING YOUR THERMOSTAT
Change Temperature Setting Until the Next Program Period (Temporary Change)
❑ Press
or
until the screen shows the desired temperature setting.
NOTE: The temporary temperature setting is displayed for about 3 seconds and then the room temperature is dis-
played. Temporary appears in the display. The setting cancels when the next program period starts or when
Run
Program
you press
.
Change Temperature Setting Indefinitely (Hold)
System
❑ Press
until “Heat” or “Cool” is displayed.
Hold Temp
❑ Press
then or to change your setting if desired. (The display changes from showing the setpoint
temperature to room temperature after approximately three seconds).
Run
Program
❑ To cancel “Hold” press
.
Change the Temperature Setting Until a Designated Day and Period (Vacation Hold)
Hold Temp
❑ Press
❑ Press
twice.
until the display shows the desired temperature setpoint.
until the desired number of days that you will be away (1 through 255) is displayed.
or
❑ Press Time
Leave
Sleep
Return
Wake
❑ Press
,
,
or
to select the program period when you want the program to restart.
Run
Program
NOTE: If the Vacation Hold needs to be cancelled before the designated time, press
program.
to return to the
Daylight Savings Time Key
This feature allows you to switch between standard time and daylight savings time.
Daylight
Time
❑ Press
during fall to set the time back one hour.
17
69-1285—2
Daylight
Time
❑ Press
during the spring to set time forward one hour. DST is displayed when operating on daylight savings
time.
NOTE: Pressing the Daylight Time key more than once in a five minute period scrolls you through various time
option. For 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.
STEP 11. SET THE FAN AND SYSTEM KEY
Set the Fan Key
❑ Fan On: The fan runs continuously. Use for improved air circulation or more efficient central air cleaning. (In a heat
only system, the fan runs continuously only if the fan relay is connected to the G thermostat terminal).
Fan
❑ Press
until display shows On.
❑ Fan Auto: Normal setting for most homes. The equipment controls the fan operation.
Fan
❑ Press
until display shows Auto.
NOTE: If you set the fan to On during normal operation, the fan reverts to the programmed fan setting when the
next program period begins.
Set the System Key
❑ Heat: The thermostat controls your heating system.
System
❑ Press
until display shows Heat.
❑ Off: Both the heating and air conditioning systems are off.
System
❑ Press
until the display shows Off.
❑ Cool: The thermostat controls your air conditioning system.
System
❑ Press
until the display shows Cool.
69-1285—2
18
IF YOU HAVE A PROBLEM
Table 4. Solution Guide.
If...
Then…
Display does not appear.
•
•
Make sure the batteries are installed correctly.
Make sure the thermostat is mounted and latched on the wall plate.
Mount and latch the thermostat on the wallplate if it is not.
Temperature settings will not change
(example; cannot set the heating higher
or the cooling lower).
•
Make sure the temperature setpoints are:
40 to 90°F (4.5 to 32°C) for heating.
45 to 99°F (7 to 37°C) for cooling.
Heating does not come on.
•
•
•
Make sure the heating setpoint is above the room temperature.
Make sure the circuit breaker is not tripped, and reset it if necessary.
Make sure the power switch at the equipment is in the On position, and
set it to On if it is in the Off position.
•
•
Wait five minutes for the system to respond.
Set the system key to Heat.
Cooling does not come on.
•
•
•
Make sure the cooling setpoint is below the room temperature.
Make sure the circuit breaker is not tripped, and reset it if necessary.
Make sure the system switch at the air conditioner is in the On position,
and set it to On if it is in the Off position.
•
•
Wait five minutes for the system to respond.
Set the system key to Cool.
Wait five minutes after seeing the flame or snowflake and check the
registers again. If no there is no hot or cool air coming from the registers,
refer to Heating does not come on or Cooling does not come on. If all of this
has been checked, contact your local heating and cooling contractor.
System on indicator( = heat,
cool) is lit, but no warm or cool air is
coming from the registers.
=
Display flashes during programming.
The temperature setting limit has been reached. The heating setting range
is 40°F to 90°F (4.5°C to 32°C). The cooling setting range is 45°F to 99°F
(7°C to 37°C).
Temperature change occurs at the
wrong times.
1. Check the program times for the period in question.
2. Make sure the AM and PM settings are correct.
3. Make sure the current time and day settings are correct.
4. Reprogram any incorrect settings.
NOTE: If your thermostat is set for Smart Response control, the start
times occur before your programmed comfort periods.
19
69-1285—2
Toll-Free Customer Assistance
Please read and follow the provided instructions for this thermostat. For additional information, go to
hours are Monday through Friday, 7:00AM to 5:30PM Central Time.
Before calling, please have the following information available:
•
•
•
•
Thermostat model number. (Located on back of thermostat).
Thermostat date code. (Located below model number).
Type of heating/cooling system (for example, hot water, warm air, oil, or gas).
Location and number of wires connected to the thermostat.
SMART RESPONSE™ TECHNOLOGY
Your CT3650 is actually a small computer. The Smart Response technology calculates the correct time of day to turn
on your heating or cooling system. Smart Response technology considers the following information.
•
•
•
Air temperature.
Wall temperature.
The time of day when you want the comfort temperature established.
System Operating
in Comfort Mode
When the thermostat activates Smart
Response technology, the thermostat
displays In Recovery, changes the
setpoint, and turns on the system.
AM
Room
68°F
66°F
Mon
Wake
System
Heat
Recovery
Continues
AM
Room
•
•
•
Your CT3650 thermostat learns from
experience. Each day it checks how
closely it hit the recovery target and then
adjusts the next day’s recovery start
time accordingly.
It takes a few days after installation for
the thermostat to adjust to the local
weather, your lifestyle, the construction
of your home, and your heating/cooling
system.
You can turn off Smart Response
technology by selecting Conventional
Recovery. See Step 7. Customize Your
Thermostat.
Mon
Heat
Sleep In Recovery
System
Heat
Recovery
Begins
1
AM
Room
64°F
62°F
Mon
Heat
Sleep In Recovery
System
Heat
System Operating in
Energy Savings Mode
AM
Room
Mon
Sleep
System
Heat
5:00
5:30
6:00
6:30
ENERGY
SAVINGS
PERIOD
COMFORT
PERIOD
RECOVERY FROM ENERGY SAVINGS
TIME
THERMOSTAT USES THE SAME SCHEME TO RETURN TO LOWER COMFORT TEMPERATURE DURING
THE COOLING SEASON.
M18591
1
IF In Recovery IS DISPLAYED, PRESS
TO SEE THE COMFORT SETPOINT.
69-1285—2
20
WIRING DIAGRAMS
4-WIRE HEAT/COOL
(JUMPER INTACT)
2-WIRE HEAT-ONLY
(JUMPER INTACT)
THERMOSTAT
THERMOSTAT
B
B
RC
O
W
Y
RC
O
W
Y
R
G
R
G
HEATING
COOLING
CONTACTOR
COIL
FAN
RELAY
HEATING
RELAY OR
VALVE COIL
RELAY OR
1
VALVE COIL
1
1
POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
1
POWER SUPPLY.
PROVIDE DISCONNECT MEANS
M10617
AND OVERLOAD PROTECTION AS REQUIRED.
M10616
4-WIRE SINGLE-STAGE HEAT PUMP
(JUMPER INTACT)
3-WIRE HEAT ONLY WITH FAN
(JUMPER INTACT)
THERMOSTAT
B
THERMOSTAT
B
RC
O
W
Y
RC
O
W
Y
R
G
R
G
3
2
HEAT
CHANGEOVER
VALVE
COMPRESSOR
CONTACTOR
HEATING
FAN
RELAY
2
RELAY OR
1
VALVE COIL
COOL
CHANGEOVER
VALVE
1
FAN
RELAY
1
POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
M10618
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
1
2
3
USE EITHER O OR B FOR HEAT PUMP CHANGEOVER.
USING A JUMPER WIRE (NOT SUPPLIED) CONNECT W TO Y.
M12739
21
69-1285—2
5-WIRE HEAT/COOL
(JUMPER REMOVED)
5-WIRE HEAT/COOL WITH DAMPER
(JUMPER INTACT)
THERMOSTAT
B
THERMOSTAT
B
RC
O
W
Y
RC
O
W
Y
R
G
R
G
HEAT
DAMPER
HEATING
RELAY OR
VALVE COIL
FAN
RELAY
HEAT
RELAY
COMPRESSOR
CONTACTOR
COOLING
CONTACTOR
COIL
1
1
COOL
DAMPER
FAN
RELAY
1
1
POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND OVERLOAD
M10619
1
POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND
OVERLOAD PROTECTION
AS REQUIRED.
PROTECTION AS REQUIRED.
M18738
Notice:
This thermostat is a Class B digital apparatus that complies with Canadian Radio Interference Regulations,
CRC c. 1374.
69-1285—2
22
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 Honeywells
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. USA
Honeywell Canada:
Dock 4 — MN10-3860
Honeywell Limited/Honeywell Limitée
35 Dynamic Drive
1885 Douglas Drive North
Golden Valley, MN 55422-3992
Scarborough, Ontario M1V 4Z9
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.
Honeywells 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 Relations Center, 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 Limitée, 155 Gordon Baker Road,
North York, Ontario M2H 3N7.
23
69-1285—2
Home and Building Control Home and Building Control
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
69-1285—2 J.H. Rev. 04-01
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