TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA
TOTAL COMFORT TEMPERATURE MANAGEMENT WITH ADAPTIVE INTELLIGENT RECOVERY™
Congratulations! You made a smart choice when you purchased your new Honeywell Thermostat. It’s the smart thermostat that:
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.
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 of an old control containing mercury in a sealed tube.
If you have questions, call Honeywell Inc. at 1-800-468-1502.
Check Table 1 to make sure this thermostat is compatible with your system. If not, return to the 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 | Yes |
Gas—Electronic Ignition | Yes |
Gas-Fired Boilers | Yes 1 |
Gas—Millivolt | No |
Oil-Fired Boilers | Yes 1 |
Oil-Fired Furnace | Yes |
Electric Furnace | Yes |
Electric Air Conditioning | Yes |
Baseboard Electric (120/240 line volt) | No |
Heat Pumps/Multistage Equipment | No |
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 valves.
Acquire tools and items as needed (below).
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 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 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 which programmable thermostats will work with your system, call Honeywell Customer Assistance at 1-800-468-1502.
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 work without installing an isolating relay on these systems. For details, call Honeywell Customer Assistance at 1-800-468-1502.
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.
As a precaution when leaving home for longer than a month, change batteries before you leave to prevent system from shutting down due to lack of battery power. Use fresh alkaline batteries; nonalkaline batteries do not last as long, and may leak, causing damage to the thermostat or the wall surface. We recommend Energizer® batteries.
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 you choose conventional recovery, adjust screw 3A (on the back of the thermostat) by turning out one turn.
With Adaptive Intelligent Recovery™, your home gradually reaches the comfort temperature you set at the exact time programmed into the thermostat to achieve maximum energy savings and comfort.
More about Adaptive Intelligent Recovery™…
This thermostat is actually a small but powerful computer. When calculating the exact time to turn on your furnace or air conditioner, it considers: (1) air temperature, (2) the temperature of the wall and (3) when you want the comfort temperature established.
During recovery, the thermostat increases the control temperature gradually and turns the equipment 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 during recovery by pressing the CURRENT SET-TING key.
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 for the thermostat to adjust to the weather, your lifestyle, home construction and heating/cooling system.
With conventional recovery, the programmed time marks the start of the time your furnace or air conditioner comes on to start recovery; 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.
NOTE: If you adjust screw 3A for conventional recovery, a indicator appears in the lower right corner of the thermostat display as a reminder that you are no longer using the Adaptive Intelligent Recovery™ feature.
After the batteries are installed, the thermostat can be easily programmed in your hand before it is installed on the wall. 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 planning your program schedule of time and temperature settings for various times of the day.
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 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 heating season, or a lower temperature during cooling season.)
You will set one schedule for weekdays, one for Saturday, and another for Sunday, because your requirements will probably be different for each.
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 controls to these settings. The thermostat requires a time and temperature program for the MORN-ING period. You can program DAYTIME and EVENING, or leave them blank. You can also change NIGHT or cancel it (see page 15), as you please. 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 fingernails or pencil points can damage the keypad. 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.
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.
When programming your new thermostat, use this guide. Batteries are required for programming and operation.
SET PRESENT DAY
Press and release
SET PRESENT TIME
Press and release
HEATING PROGRAM
With system switch at HEAT, press and release
For Saturday, press
For Sunday, press
COOLING PROGRAM
The times you set for heating remain the same for cooling; you only need to program the temperatures.
With system switch at COOL, press and release
For Saturday, press
Saturday morning temperature. Repeat using DAYTIME, EVENING, NIGHT keys.
For Sunday, press
Press and release
For operating or making changes, use this guide.
Temporarily Change temperature for current period only
Hold a temperature indefinitely (such as on vacation)—
Check current temperature setting—
Cancel a program
Press and hold
Permanently Change a program
Repeat steps under Heating Program (page 13) or Cooling Program (page 14), as applicable.
Return to normal program or start program—
a Press on
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.
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 thermostat, 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, or about one complete turn.
In the unlikely event that you want longer furnace on-time, readjust screws 1A and/or 1B as follows:
First, turn both screws in completely, then ad-just for system type:
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.
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 must be removed to access the switch.
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 masking tape labels you placed on 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 22 and 23.
In 5-wire installations only, be sure to remove the factory-installed jumper connecting terminals R and Rc.
HEATING
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. Instead, you could jumper R and W wires at the thermostat.
Move the system switch to HEAT and the fan switch to AUTO.
Press up arrow of key until the setting is about 10°F (6°C) above room temperature. Heating should start and the fan should run after a short delay (immediately if fan operation switch is set in ELEC position).
COOLING
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.
NOTE: When cooling setting is changed, thermostat may delay up to five min-utes before turning on the air conditioner. This delay protects the compressor.
First set the fan switch.
Then set the system switch.
IF… THEN…
Display does not come on.
Display flashes during programming.
Temperature change occurs at the wrong times.
Heating does not come on.
Cooling does not come on.
The house is too warm or too cool.
HEAT ON is displayed, but no heat is coming from the registers.
The system cycle length is too short or too long.
The thermostat’s current setting does not match the display temperature to within ± 1°.
Incorrect room temperature showing on thermostat display.
For all questions concerning this thermostat, please read and follow the instructions. If additional assistance is needed, call Honeywell Customer 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 information available—thermostat model number and date code, type of heating/cooling system (e.g., hot water, warm air, oil, gas, etc.), and 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.
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,
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.
Download manual: Honeywell Home CT3400 PROGRAMMABLE THERMOSTAT INSTALLATION INSTRUCTIONS
Honeywell Home CT3400 PROGRAMMABLE THERMOSTAT INSTALLATION INSTRUCTIONS
Johnson Controls T7000e LCD Digital Thermostat Johnson Controls T7000e LCD Digital Thermostat Installation Guide
Honeywell T8635L Microelectronic Communicating Programmable Thermostat Honeywell T8635L Microelectronic Communicating Programmable Thermostat USER’s GUIDE
Hetta HS01RF WIRELESS THERMOSTAT Kit PAIRING INSTRUCTIONS Insert batteries into the Thermostat. Ensure that the…
HEAT-MAT NGT-567-0010 Underfloor Heating Thermostat Menu Introduction The NGT thermostat can switch your underfloor heating…
Honeywell RLV450 PROGRAMMABLE THERMOSTAT READ BEFORE INSTALLING DESCRIPTION * LP appears only for the first…
Honeywell RLV431 Programmable Thermostat Description The RLV431 thermostat can be used to control an electric…