Honeywell Home CT3600 PROGRAMMABLE THERMOSTAT OWNER’S GUIDE

Honeywell Home CT3600 PROGRAMMABLE THERMOSTAT

Total Comfort Temperature Management with Smart Response Control
Congratulations! You made a smart choice when you purchased your new Honeywell Thermostat.
It’s the smart thermostat that:

• Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning should go on to have the house at the desired comfort temperature by the time you wake up or return home.
• Saves the maximum amount of energy and money by remembering to automatically adjust the temperature when you leave home or go to sleep.
• Provides the ultimate in comfort and convenience. It comes already programmed, so it’s your choice—use the preprogrammed schedule or set your own.
  We invite you to spend a few minutes reading this manual. You’ll find it answers many of the questions that will arise as you become familiar and comfortable with your Honeywell thermostat, the state-of-the-art in-home comfort controls.

RECYCLING THERMOSTAT

If this thermostat is replacing a control that contains mercury in a sealed tube, do not place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of this control, or an old control containing mercury in a sealed tube. If you have questions, call Honeywell Inc. at 1-800-468-1502.

STEP 1. PREPARE FOR INSTALLATION
Check the compatibility chart to make sure this thermostat is compatible with your system. If not, return it to the retailer. For specialty thermostat information, call Honeywell Customer Assistance, toll-free at 1-800-468-1502.

System Type	Compatible with CT3600
Gas—Standing Pilot Gas—Electronic Ignition Gas-Fired Boilers Gas—Millivolt Oil-Fired Boilers Oil-Fired Furnace Electric Furnace	Yes Yes Yes  ▲1 No Yes  ▲1 Yes Yes

System Type	Compatible with CT3600
Electric Air Conditioning Baseboard Electric (120/240 line volt) Single Stage Heat Pump Multistage Heat Pumps/Multistage Equipment	Yes No   Yes No

Compatibility Chart
Not compatible with any 120/240-volt circuit. 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.

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 damage, do not operate the cooling system when the outdoor temperature is below 50°F (10°C).
• Turn off power to the system at the furnace, or at the fuse/circuit breaker panel.
• Carefully unpack your new thermostat and wallplate; save the package of screws, instructions, and receipt.
• 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.
• 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 damage, do not operate the cooling system when the outdoor temperature is below 50°F (10°C).
• Turn off power to the system at the furnace, or at the fuse/circuit breaker panel.
• Carefully unpack your new thermostat and wallplate; save the package of screws, instructions, and receipt.
• 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.

Replacing a clock thermostat that has C or C1 clock terminals?
If you are replacing a Honeywell Chronotherm® Clock Thermostat, you may find one or two wires that go to the C or C1 clock terminals on the Chronotherm® wiring wallplate. Do not allow them to touch, or you can damage your 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.

Six or more wires?
If there are six or more wires (excluding the clock wires attached to terminals), you most likely have a variation of a multistage heat pump or another 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 which programmable thermostats will work with your system, call Honeywell Customer Assistance Center at 1-800-468-1502.

Three thermostat wires?
If you have three wires for a heating-only system 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 work only if you install an isolating relay on these systems. For details,
call Honeywell Customer Assistance Center at 1-800-468-1502.

STEP 3. MOUNT THERMOSTAT WALLPLATE

• 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, and drill 3/16 inch holes in the 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.
• Reposition the wallplate over holes, pulling wires through the wiring opening. Loosely insert two mounting screws into holes.
• Level for appearance only; thermostat functions properly even when not level. Tighten mounting screws.

STEP 4. 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. Refer to the labels you placed on the wires when you removed your old thermostat.

• Match the letter of your old thermostat wire with the terminal of the corresponding letter on your new thermostat. Refer to illustrations on pages 10, 11, and 12. Be sure to remove the factory-installed jumper connecting terminals R and Rc when wires are connected to both the R and Rc terminals.
• Loosen the terminal screws and slip each wire beneath its matching terminal. Either straight or wraparound wiring connections are acceptable (see illustration). Tighten terminals.
• Plug the hole in the wall with insulation to help prevent drafts from adversely affecting thermostat operation.

STEP 5. INSTALL THE BATTERIES

IMPORTANT
Three AA alkaline batteries are included with the thermostat. Batteries must be installed for the programming and operation of the thermostat and heating/cooling
system.

• Install the batteries on the wallplate as shown, making sure positive (+) terminals all face upward.
• As the batteries are running low, a REPL BAT indicator will flash for 1 to 2 months before the batteries run out completely. Replace the batteries as soon as possible after the indicator starts flashing.

If you insert new batteries within 20 to 30 seconds of removing the old ones, you will not have to reset the current time. However, if the display is blank, the batteries are dead or incorrectly installed. See page 22 to reset the current time and day.

IMPORTANT
Although the thermostat has a low battery indicator, replace the batteries once a year to prevent leakage and to prevent the thermostat and heating/cooling
system from shutting down due to lack of battery power. As a precaution when leaving home for longer than a month, change batteries before you leave to prevent the system from shutting down due to a lack of battery power. Use fresh alkaline batteries; non-alkaline batteries do not last as long and may leak,
causing damage to the thermostat or the wall surface. We recommend Energizer® batteries.

STEP 6. SET FAN OPERATION SWITCH

The thermostat fan operation switch, labeled FUEL SWITCH is factory set in the F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to E. The E setting allows the fan to turn on immediately with the heating or cooling in a system where the G terminal is
connected.

STEP 7. MOUNT THE THERMOSTAT

• ENGAGE TABS AT THE TOP OF THE THERMOSTAT AND WALLPLATE
• ENGAGE TABS AT THE TOP OF THE THERMOSTAT AND WALLPLATE

STEP 8. CUSTOMIZING YOUR THERMOSTAT
The thermostat can be customized to match your heating/cooling system and your display preferences. See pages 18 and 19 for available options. The thermostat comes factory set to the most common settings:

• °F temperature display,
• 12-hour clock format,
• Heating system on-time set for gas or oil forced air system,
• Smart Response

You can change any of these settings by pressing and holding the Information key and both keys until the numbers 4 and 6 are displayed. All the display segments will appear for about 3 seconds before the numbers 4 and 6 appear.

Smart Response

The CT3600 Thermostat is a small but powerful computer. The Smart Response feature calculates the time to turn on your heating or cooling system. It considers:

• air temperature
• wall temperature
• the time you want the comfort temperature established.

The thermostat displays In Recovery, changes the setpoint, and turns on the system whenever the thermostat activates the Smart Response feature.

• This thermostat learns from experience. Each day it checks how closely it hit the recovery target and 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 the Smart Response feature in the installer setup section by selecting Conventional Recovery.

Smart Response

THERMOSTAT USES THE SAME SCHEME TO RETURN TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON IF In Recovery IS DISPLAYED, PRESS TO SEE THE COMFORT SETPOINT

The following table shows the numbers that will be displayed and what your choices are.

Select	Number Displayed (Press Time              key to change)	Factory-Setting		Other Choices (Press ▲ or ▼ key to change)		Actual
		Display	Description	Display	Description	Setting
Heating cycle ratea	4	6	Gas or oil forced air heating system	1, 3 or 9	1—radiant floor heat or gravity steam system 3—hot water system or high efficiency furnace 9—electric heat system
Smart Response controlb	13	0	Smart Response control is activated (system starts early so your house is at your programmed temperature at your programmed time)	1	Conventional recovery (system starts at your programmed time)

Select	Number Displayed (Press Time              key to change)	Factory-Setting		Other Choices (Press ▲ or ▼ key to change)		Actual
		Display	Description	Display	Description	Setting
Tempera- ture format	14	0	Temperature is displayed in °F	1	Temperature is displayed in °C
Clock format	16	0	Time is displayed in 12-hour format	1	Time is displayed in 24-hour (military time) format
Factory set function	37	0	Do not change	—	—	—

Be sure to change the heating cycle rate to 3 when using a high-efficiency furnace such as a 90% or greater AFUE (Average Fuel Utilization Efficiency) unit. Refer to the Smart Response control section for more information

IMPORTANT
Press to Run Program to exit the customizing feature. The thermostat has saved your changes, but you must set the current day and time for the thermostat to use the settings. Refer to the Setting Current Day and Time portion of the Programming section for instructions.

STEP 9. PROGRAMMING
The keyboard is located behind the thermostat cover with three frequently used keys by the display. Pressing the Information key will display the present settings and pressing the keys change the temperature. The thermostat display shows the day, time, program period, temperature, and system operation selection. There is an individual key for each of the four time periods

• Morning —the period you want the house at a comfortable temperature when you get up and while you get ready for work or school. (This will be a higher temperature during the heating season and a lower temperature during the cooling season.)
• Daytime is the period you can set an energy-saving temperature while you are away at work or school. (This will be a lower temperature in the heating season and a higher temperature during the cooling season.)
• Evening is the period you want the house at a comfortable temperature for activities before bedtime. (Again, higher heat and lower cool.)
• Night —the period you can set for an energy-saving temperature while you are sleeping. (Again, lower heat and higher cool. Some people choose not to
  raise the cooling temperature for more comfortable sleeping.)

The personal programming table on page 21 may be helpful when planning your schedule of time and temperature settings. The thermostat default settings are in the parenthesis ( ).

Personal Programming Table

Period	Default Setting	Sunday (Sun)	Monday (Mon)	Tuesday (Tue)	Wednesday (Wed)	Thursday (Thu)	Friday (Fri)	Saturday (Sat)
Morning	Time (6:00 AM)
	Heata (70°F/21°C)
	Coolb (78°F/25.5°C)
Daytime	Time (8:00 AM)
	Heata (62°F/16.5°C)
	Coolb (85°F/29.5°C)
Evening	Time (6:00 PM)
	Heata (70°F/21°C)
	Coolb (78°F/25.5°C)
Night	Time (10:00 PM)
	Heata (62°F/16.5°C)
	Coolb (82°F/28°C)

• Your heating setpoints cannot be set higher than 90°F (32°C) or lower than 40°F (4.5°C).
• Your cooling setpoints cannot be set higher than 99°F (35°C) or lower than 45°F (7°C).

Setting the Current Day and Time

Press and release Set Current Day/Time then until the current day is displayed. (Sun = Sunday, Mon = Monday, Tue = Tuesday, Wed = Wednesday, Thu = Thursday, Fri = Friday, Sat = Saturday.

NOTE: On initial power up, 1:00 pm flashes on the display until you press a key.

• NOTE: On initial power up, 1:00 pm flashes on the display until you press a key.
  (Tapping the Set Current Day/Time will advance the time in one-hour increments.)

NOTE: If the current time is Daylight Savings Time, press Daylight Time  until DST is displayed
Press  Run Program

IMPORTANT
Always press the keys with your fingertip or a similar blunt tool. Sharp instruments like pens and pencil points can damage the touchpad

Programming the First Day
Start by programming the Morning time and temperature for any one day:

• Press and release Morning then the desired day is displayed. Press the desired day is displayed. keys until the desired Morning time is displayed. (The program times are in fifteen-minute intervals. Example: 8:00, 8:15, 8:30.) Press or key until the desired Morning temperature is displayed.
• (The setpoint temperature range is 40 to 90°F (7 to 31°C) for heating and 45 to 99°F (9 to 37°C) for cooling.) Press Heat/Cool Settings to switch to your other system temperature setpoint.
  NOTE: The program times are the same for both heating and cooling.
  NOTE: The program times are the same for both heating and cooling
• Press until the other desired temperature setpoint is displayed. Press, Daytime, or Evening  Night repeat the above steps for programming for the rest of the day. The first day is now programmed.

IMPORTANT
Repeat all the above steps for each day of the week that has a different program than your first day. Refer to the Copying a Day section to copy any program day to another.

• Press Run Program when all the days are programmed.

Copying a Day
NOTE: Your thermostat must be in program mode to use the copy feature.

• Press Morning then select the day to be copied if different from the day displayed. Press Copy then until the day to be copied is displayed. Press Copy
  NOTE: “donE” will be displayed for two seconds and then the normal program display will be shown. Repeat the above steps for all the desired days then press Run Program

Clearing Program Period
NOTE: Your thermostat must be in program mode to use the clear feature.

• Press, Morning, Daytime, or Evening.Night
• Press until the desired day is displayed. Press Daytime and hold, or Evening until Night the start time and temperature the setting is cleared (approximately 3 seconds).
• NOTE: Morning cannot be cleared. Repeat the above steps for all the periods to be cleared then press Run Program

STEP 10. OPERATING
YOUR THERMOSTAT
Setting Temporary Temperatures
Changing Temperature Setting Until The Next
Program Period
Press or key until the desired temperature setpoint is displayed.
NOTE: Your temporary temperature setting is displayed for approximately 3 seconds. The setting is canceled when the next period starts or when the Run
The programs pressed.

Changing Temperature Setting Indefinitely
Move the System switch to heat or cool. Press the Hold Temp or the key to change your setting, if desired. (The display changes from the setpoint to the room temperature after approximately 3 seconds.) Anytime you want to cancel the Hold, press Run Program

Changing Temperature Setting Until
A Designated Day And Period Move the System switch to heat or cool

• Press Hold Temp twice then keys until the desired number of days is displayed (1 to 255 days). (Example: 18 = Hold will override the daily programs for 18 days.)
• Press, Morning  Daytime Evening Nightor select the period your program will restart.

(Example: Evening = thermostat will stop the Hold at the Evening period start time.) Press or key to adjust the temperature setting, if desired. (Example: Heat 54° = heating equipment will operate when the room temperature is below 54°F.)
NOTE: In this example, your thermostat uses the Hold setting for eighteen days and returns to the daily programs at the Evening period start time. Your heating temperature setting is 54°F. Only the heating temperature is used because the system is set for Heat.

IMPORTANT
If the Hold needs to be canceled before the designated time, press Run Program to return to your program.

Using Daylight Savings Time Feature
This feature allows you to change in and out of Daylight Savings Time with a key press. When is Daylight Time pressed in the fall, the time will go back one hour. In the spring, the time will go ahead one hour and the display will show DST. See Setting the Current Day and Time section for initial setting instructions

NOTE: Pressing Daylight Time more than once within five minutes will scroll you through various time options (For example one hour earlier or later with or without DST). Pressing Daylight Time six times in five minutes will return you to your original settings.

Using Usage Feature
Press Usage once to display the minutes that the heating or cooling system has been operating for the current day. Press Usage a second time, within 10 seconds, to display the system operating time for the previous day (midnight to midnight). Press Usage a third time, within 10 seconds, to display the system operating time since the last time the usage function was cleared.
NOTE: Press Usage for 3 seconds to clear the usage function

STEP 11. SETTING THE FAN AND SYSTEM SWITCHES

First set the fan switch. Fan On: The fan runs continuously. Use for improved air circulation or for 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 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 low with the furnace.

Then set the system switch. The display will show which Heat: The thermostat controls your heating system. system is on: flame = heat and snowflake = cool. Off: Both the heating and air conditioning systems are off. Cool: The thermostat controls your air conditioning system.

TROUBLESHOOTING GUIDE

I F …	THEN…
Display will not come on.	•           Check that the batteries are installed correctly and fresh. •           Check if the thermostat is mounted and latched on the wallplate—mount and latch the thermostat on the wallplate.
Temperature settings will not change (Example: cannot set the heating higher or the cooling lower).	•           Check that the temperature setpoints are: — heating: 40 to 90°F (4.5 to 32°C) — cooling: 45 to 99°F (7 to 35°C).
Heating will not come on.	•           Check that heat setpoint is above room temperature. •           Check if the circuit breaker is tripped—reset the circuit breaker. •           Check if the system switch at the equipment is in the Off position—set to On position. •           Wait five minutes for the system to respond. •           Set system switch to Heat.

I F …	THEN…
Cooling will not come on.	•           Check that cool setpoint is below room temperature. •           Check if the circuit breaker is tripped—reset the circuit breaker. •           Check if the system switch at the equipment is in the Off position—set to On position. •           Wait five minutes for the system to respond. •           Set system switch to Cool.
System on indicator (flame=heat, snowflake= cool) is lit, but no warm or cool air is coming from the registers.	Wait five minutes after seeing the flame or snowflake and then check the registers. If no heat or cool air is present, see “Heating will not come on” or “Cooling will not come on” steps.

 

I F …	THEN…
Display flashes during programming.	•           You have reached the temperature setting limit. 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 35°C).
Temperature change occurs at the wrong times.	•           Check the program times for the period in question. Be sure that AM and PM indications are correct. Make sure the current day and time are correct. Reprogram if necessary. •           If the thermostat is set for Smart Response control, the start times will occur before your programmed comfort periods.

Toll-free Customer Assistance
For all questions concerning this thermostat, please read and follow the instructions. If additional assistance is needed, call
Honeywell Customer Assistance is 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 information available—thermostat model number and date code, type of heating/cooling system (e.g., hot water, warm air, oil, gas, etc.), and the number of wires connected to the thermostat.
NOTICE: This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference Regulations, CRC c.1374.

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
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.
If the product is defective,

1.  return it, with a bill of sale or other dated proof of purchase, to the retailer from which you purchased it, or
2. 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 Limited
Return Goods Department Product Services ON30
1050 Berkshire Lane 155 Gordon Baker Road
Plymouth, MN 55441-4437 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 that 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 Limited, 155 Gordon Baker Road, North York, Ontario M2H 3N7

Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis, MN 55408-0524
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7 69-0939—1 Rev. 11-97 J.H.
Copyright © 1997 Honeywell Inc. All Rights Reserved ® U.S. Registered Trademark

Reference

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Honeywell Home CT3600 PROGRAMMABLE THERMOSTAT OWNER’S GUIDE

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Honeywell Home CT3600 PROGRAMMABLE THERMOSTAT INSTALLATION INSTRUCTIONS

Honeywell Home CT3600 PROGRAMMABLE THERMOSTAT OWNER’S GUIDE