Honeywell TH8000 Touchscreen Programmable Thermostat
BE CAREFUL! Never use sharp instruments, such as a pencil or pen, to press the touchscreen keys. To prevent damage to the thermostat, always press the keys with your fingertip This manual covers the following models TH8110U: For 1 Heat/1 Cool systems TH8320U: For up to 3 Heat/2 Cool systems TH8321U: For up to 3 Heat/2 Cool systems with dehumidification (Pull the thermostat from the wallplate and turn it over to find the model number This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply, See www.dtsc.ca.gov/hazardouswaste/perchlorate
Need Help?
For assistance with this product please visit http://yourhome.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502
This thermostat is ready to go! Your new thermostat is pre-programmed and ready to go. See page 3 to check settings.
CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate the cooling system when the outdoor temperature is below 50˚F (10˚C).
About your new thermostat
Congratulations! You’ve just purchased the world’s most advanced, easy-to-use thermostat. It has been designed to give you many years of reliable service and touchscreen climate control.
Features
- 7-day program schedules maximize comfort and economy.
- Armchair programming: Just pull the thermostat from the wall to set schedules.
- Energy-saving settings for maximum cost savings.
- One-touch temp control overrides the program schedule at any time.
- Precise comfort control keeps the temperature within 1°F of the level you set.
- Change/check reminders to let you know when to service or replace filters, batteries, and other critical components.
- Large touchscreen display with backlight is easy to read—even in the dark.
- Select models to display and control summer humidity.
- Select models that accommodate optional outdoor or indoor remote sensors
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and manually adjust the temperature (see pages 12-14)
A quick reference to controls
A quick reference to the status display
A quick reference to the status display
Fan setting
Press FAN to select fan operation, then press DONE.
- On: The fan is always on.
- Auto: The fan runs only when the heating or cooling system is on.
- Circ: The fan runs randomly, about 35% of the time, not counting any run time with the heating or cooling system.
You can press FAN to override the fan settings you’ve programmed for different time periods (see page 11). If you select On or Circ, the setting you select will remain active until you press FAN again to select Auto (see page 27 for more information).
Note: If a fan schedule is programmed, “Auto” will run the fan schedule.
System setting
Press the SYSTEM button to select, then press DONE.
- Heat: The thermostat controls only the heating system.
- Cool: The thermostat controls only the cooling system.
- Off: Heating and cooling systems are off.
- Auto: The thermostat automatically selects heating or cooling depending on the indoor temperature.
- Em Heat (only for heat pumps with auxiliary heat): The thermostat controls Emergency and Auxiliary Heat. A compressor is locked out. Select models only
Save money by setting program schedules
It’s easy to program your system for maximum energy savings. You can program four time periods each day, with different settings for weekdays and weekends.
- Set to the time you awaken and the temperature you want during the morning, until you leave for the day.
- Set to the time you leave home and the temperature you want while you are away (usually an energy-saving level).
- Set to the time you return home and the temperature you want during the evening, until bedtime.
- Set to the time you go to bed and the temperature you want overnight (usually an energy-saving level).
Energy-saving settings for maximum cost savings
This thermostat is pre-set with energy-saving program settings. We recommend these settings, since they can reduce your heating/cooling expenses by as much as 33%. (See next page to adjust times and temperatures of each time period.)
To adjust program schedules
- Press SCHED, then EDIT.
- Press the day buttons (MON-SUN) to select the day(s).
- Press
or 
to set Wake time for the selected day(s). - Press or set the Heat and Cool temperature for this time period.
- Press other time periods (LEAVE, RETURN, SLEEP) to set the time and temperatures for each.
- Press DONE to save & exit (or press CANCEL to exit without saving changes).
Note: You can press CANCEL PERIOD to eliminate any unwanted time period.
Note: Press FAN to customize fan settings for any time period (see page 7).
Program schedule override (temporary)
Press immediately to adjust the temperature. This will temporarily override the temperature setting for the current time period. The new temperature will be maintained only until the time you set. When the timer expires, the program schedule will resume and set the temperature to the level you’ve programmed for the current time period. To cancel the temporary setting at any time, press CANCEL (or SCHED). The program schedule will resume.
Program schedule override (permanent)
Press HOLD to permanently adjust the temperature. This will turn off the program schedule. Whatever temperature you set will be maintained 24 hours a day until you manually change it or press CANCEL (or SCHED) to cancel “Hold” and resume the program schedule.
Vacation hold
This feature can suspend the program schedule for extended periods of time.
Press or to set the temperature you want, then pressor to set the time of day you want the schedule to resume when you return. Press HOLD twice, then press or to select the number of days. Whatever temperature you set will be maintained 24 hours a day for the number of days you select. After this number of days has elapsed, the previously programmed schedule will resume at the time you set.
If you return earlier than expected, press CANCEL (or SCHED) to cancel “Hold” and resume the program schedule.
Special features
Auto Changeover: When set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature.Adaptive Intelligent Recovery: This feature allows the thermostat to “learn” how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached at the time you set. For example: Set the Wake time to 6 am and the temperature to 70°. The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6. The message “Recovery” is displayed when the system is activated before a scheduled time period. Compressor Protection: This feature forces the compressor to wait a few minutes before restarting, to prevent equipment damage. During the wait time, the message “Wait” is displayed on the screen.
Screen lock
To prevent tampering, the screen can be partially or fully locked. When partially locked, the screen displays SCREEN LOCKED for several seconds if a locked key is pressed. To unlock the screen, press any unlocked key while SCREEN LOCKED appears on the screen. When the screen is fully locked, no keys function. To lock or unlock the screen, see advanced function 0670 on page 25.
Screen cleaning
Press SCREEN to lock the screen for cleaning. The screen will remain locked for 30 seconds so you can clean the screen without changing any settings. After 30 seconds, press DONE to resume normal operation, or press SCREEN again if you require more time for cleaning.
Note: Do not spray any liquid directly on the thermostat. Spray liquids onto a cloth, then use the damp cloth to clean the screen. Use water or household glass cleaner. Avoid abrasive cleansers
Humidity level display (select models)
Select models can display the current indoor humidity level. (If an optional outdoor sensor is installed, the outdoor temperature is shown instead of the humidity level. Press MORE to display the humidity level.)
Dehumidification control (select models)
Select models allow you to decrease summer humidity. The thermostat monitors humidity. When humidity increases, the thermostat runs the air conditioner longer to reduce humidity (up to 3°F below your cooling temperature setting). Press MORE until the humidity screen is displayed, then press or to set the desired humidity level. Press DONE to save and exit, or press CANCEL to exit without saving changes.
About your new thermostat
Batteries are optional (to provide backup power) if your thermostat was wired to run on AC power when installed. Install fresh batteries immediately when the LO BATT warning begins flashing. The warning flashes about 30 days before batteries are depleted. Even if the warning does not appear, you should replace batteries once a year, or before leaving home for more than a month.
About your new ther
Press SYSTEM
Press and hold
Advanced functions
In case of difficulty
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.
| Display is blank | • Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If thermostat is battery powered, make sure fresh AAA alkaline batteries are correctly installed (see page 20). |
| No response to key presses (or temperature will not change) | • Check to make sure the thermostat is not locked (see page 25). Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C) • Cool: 50° to 99°F (10° to 37°C) |
|
Backlight is dim |
• If thermostat is battery powered, make sure fresh AAA alkaline batteries are correctly installed (see page 20). • If thermostat is AC powered, a dim display is normal. The backlight remains on at a low level, and brightens when a key is pressed. |
| Heating or cooling system does not respond | • Press SYSTEM to set system to Heat. Make sure the temperature is set higher than the Inside temperature.
• Press SYSTEM to set system to Cool. Make sure the temperature is set lower than the Inside temperature. • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If “Wait” is displayed, the compressor protection timer is on. Wait 5 minutes for the system to restart safely, without damaging the compressor (see page 15). |
|
Display shows Fan Auto and On or Auto and Circ at the same time |
• This is normal operation. Auto indicates the thermostat is following the programmed fan setting. If Auto and On is shown, the fan is scheduled for “On” during this period (see page 7). |
Optional remote sensors (select models)
If an outdoor sensor is installed, the current outdoor temperature is displayed. If an indoor remote sensor is installed, the display shows the indoor temperature at the location of the sensor. (The internal sensor in the thermostat is disabled.) If more than one indoor sensor is installed, the display shows an average of temperature readings from all sensors.
5-year limited 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 five (5) years from the date of purchase by the consumer. If at any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option).
If the product is defective,
- return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
- call Honeywell Customer Care at 1-800-468-1502. Customer Care will make the determination whether the product should be returned to the following address: Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN 55422, or whether a replacement product can be sent to you. 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 FIVE-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 Honeywell Customer Relations, 1985 Douglas Dr, Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Toronto, Ontario M1V4Z9.
Automation and Control Solutions
- Honeywell International Inc.
- 1985 Douglas Drive North
- Golden Valley, MN 55422
- http://yourhome.honeywell.com
- Honeywell Limited-Honeywell Limitée
- 35 Dynamic Drive
- Toronto, Ontario M1V 4Z9
-
U.S. Registered Trademark.© 2011 Honeywell International Inc.
-
US Patent No. 6595430, D509151; other patents pending
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69-1894EFS—03 M.S. Rev. 03-11 Printed in the U.S.A.
Honeywell TH8000 TouchScreen Programmable Thermostat System Setup Guide
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