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TH8000 Series Programmable Thermostats

OWNERS GUIDE

U.S. Registered Trademark Patents Pending 2004 Honeywell International Inc. All Rights Reserved

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CONTENTS

Features..... Home Screen..... Programming Your Heating and Cooling Schedule... Operating Your Thermostat.... Replacing Your Batteries..... Cleaning Your Thermostat Screen... Reading Your Outdoor Temperature (Select Models)... Reading Your Remote Indoor Temperature (Select Models)... Reading Your Inside Humidity Level (Select Models)... Controlling Your Inside Dehumidification Setting (Select Models).. Advanced Settings.... Frequently Asked Questions and Answers... Limited Five-Year Warranty.... Customer Assistance..... 43 44
IMPORTANT The thermostat has a touch screen interface. Touch keys appear, as necessary, to complete tasks. Always press the keys with your fingertips. Sharp instruments like a pen or pencil point can damage the thermostat.
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FEATURES

Large, Clear Display with Backlightingcurrent temperature, set temperature and time are easy-to-read and all are displayed on the home screen. Menu Driven ProgrammingGuides you through the scheduling process, showing only necessary information and choices on each screen. Ability to Select Multiple Daysallows you to easily customize the thermostat for your unique schedule. Real-Time Clockkeeps time during power failure; automatically updates for daylight savings. Armchair Programmingallows you to remove thermostat from wall to set the schedule. Precise Temperature Control (+/- 1F)reliable, consistent comfort. Multiple HOLD optionsallows you to modify schedule indefinitely or for a specific time. Change Remindersreminds you to service or replace the air filter, humidifier pad, ultraviolet lamp or thermostat batteries. Programmable Fanincreases air quality when combined with a whole-house air cleaner. Outdoor Temperature Indication (Select Models)shows current outdoor temperature on the display to help you plan outdoor activities. NOTE: The home screen may differ slightly, depending on the heating and/or cooling system you have and the thermostat settings for your system type.

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Home Screen Key Description

SELECTS ON/AUTO/CIRC

FAN AUTO

UP ARROW

Inside Set To
RAISES TEMPERATURE SETTING

SYSTEM

SELECTS EM. HEAT/HEAT/OFF/COOL/AUTO

Following Schedule

DOWN ARROW
LOWERS TEMPERATURE SETTING

SCREEN

MORE (SELECT MODELS)
SHOWS ADDITIONAL SYSTEM INFORMATION

ENTERS SCHEDULING MODE

LOCKS OUT THE SCREEN TO ALLOW FOR CLEANING
SETS A PERMANENT HOLD AND ACTIVATES VACATION HOLD
SETS THE TIME FORWARD OR BACK

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Home Screen Display Description
SHOWS CURRENT DAY OF THE WEEK

INSIDE TEMPERATURE

SHOWS THE CURRENT INSIDE TEMPERATURE

SET TO TEMPERATURE

SHOWS THE CURRENT SET TEMPERATURE

Set To

SHOWS FAN SETTING

Inside

SHOWS CURRENT SYSTEM POSITION

FOLLOWING SCHEDULE

SHOWS THE THERMOSTAT IS FOLLOWING THE PROGRAMMED SCHEDULE

CLOCK SCREEN MORE

M19953
DISPLAY CURRENT TIME OF DAY, HOLD TIME REMAINING OR NUMBER OF VACATION DAYS REMAINING

SCHED HOLD

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Programming Your Heating and Cooling Schedule
Your thermostat can control up to four different schedule periods per day: WakePeriod when you awaken and want your home at a comfortable temperature. LeavePeriod when you are away from home and want an energy-saving temperature. ReturnPeriod when you return home and want your home back to a comfortable temperature. SleepPeriod when you are asleep and want an energy-saving temperature. NOTE: Schedule times are in 15-minute intervals.

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Setting Time

1. 2. Press Clock. Use arrows to set current time.

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Press Done key.
IMPORTANT The current day of the week should already be set correctly. If not, see advanced settings to set the day.
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Operating Your Thermostat
Setting Fan and System Keys
SETTING FAN KEY The Fan key selections vary based on your heating and/or cooling system type. Onfan runs continuously. Use this setting for improved air circulation or for more efficient central air cleaning. Autofan follows fan program schedule. See Fan Schedule section for more information. Circ fan runs randomly approximately 35% of time. Use this setting for improved air circulation or for more efficient central air cleaning when you do not want the fan running continuously. SETTING SYSTEM KEY The System key selections vary based on your heating and/or cooling system type. Heat thermostat controls your heating system. Off both heating and cooling systems are off. Cool thermostat controls your cooling system. Auto thermostat controls both your heating and cooling system based on temperature. Em. Heat (heat pump systems only) thermostat controls emergency heat and auxiliary heat, if needed. Heat pump is not operational.
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Setting Temperature Overrides
Your thermostat has three temperature override options: Hold Temperature Until, Permanent Hold and Vacation Hold. HOLD TEMPERATURE UNTIL (TEMPORARY HOLD) Holds temperature temporarily until the next scheduled period time or until the time the user sets. 1. Press Up or Down arrow next to the temperature you want to adjust. Hold Temperature Until time appears on the screen. The Hold Temperature Until time defaults to the start time of the next scheduled period.
NOTE: The Time Up and Down arrows are shown for approximately seven seconds. Pressing on the screen time (where the Hold Temperature Until time is shown) allows the arrows to reappear. 2. Press Up or Down arrow next to the Time key to set desired time for the thermostat to resume schedule.

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Hold Temperature Until

SCREEN CANCEL

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Press the Cancel or Sched key to cancel Hold Temperature Until and resume schedule.
NOTE: Once Hold Temperature Until time is reached, the thermostat shows Following Schedule on the screen to indicate that Temporary Hold has ended. PERMANENT HOLD Permanent Hold changes the temperature setting until Permanent Hold is cancelled. 1. 2. Press Hold key. Permanent Hold appears on the screen. Press Up or Down arrow next to the temperature you want to set during Hold.

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Permanent Hold

M19960
Press Cancel key to cancel Permanent Hold and resume the schedule.
VACATION HOLD Changes temperature setting for a designated number of days. 1. Press the Up and Down arrow keys to set the desired temperature while away on vacation. Notice that Hold Temperature Until time is shown on the screen. (This is the time the Vacation Hold override expires after the number of days ends.) 2. Press Hold key twice. Screen shows Hold Temperature Until one day. 3. Press Up and Down arrow keys to change the number of Days you desire thermostat to override the schedule. NOTE: Days Up and Down arrows appear for approximately seven seconds. Pressing just below Hold Temperature Until on the screen allows the Days Up and Down arrows to reappear.

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Hold Temperature Until DAYS

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To cancel the Vacation Hold override early, press the Cancel key.
NOTE: When the number of days of Vacation Hold expires, the screen shows Following Schedule to indicate that Vacation Hold has ended.
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Fan Schedule

Press Fan key while in the Scheduling Screen to program the System Fan. Choices available from the Scheduling Screen: Auto (default position)fan runs with equipment. Programmable for all schedule periods (Wake, Leave, Return and Sleep). Onfan runs continuously (programmable for all schedule periods). Circfan runs randomly for approximately 35% of schedule period (programmable for all schedule periods).
Fan Status Displayed on Home Screen
If the Fan program is scheduled, Auto is shown and any programmable mode that is set; for example, if during Wake period, Fan is set to Auto, only Auto is shown in the Fan area. However, if during the Wake period, fan is scheduled to On, both Auto and On are shown. Auto indicates fan is running its schedule; On indicates Fan schedule is set to On.

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FAN ON AUTO

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Manual Override of Fan Schedule
Autofan is automatically following the Fan schedule (choices are Auto, On or Circulate). Onoverrides Fan schedule. Fan is continuously On. Circoverrides Fan schedule. Fan circulates randomly for approximately 35% of time until the Auto position is selected.
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Replacing Your Batteries

Not all thermostat models require batteries. If your thermostat has batteries, a low battery warning flashes on the home screen for approximately 30 days. NOTE: If the batteries are not replaced when the Low Battery warning is flashing, the LO batt screen will display continuously and the thermostat will not operate until the batteries are replaced.

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NOTE: Although the thermostat has a low battery indicator, replace the batteries once each year to prevent leakage and to prevent the thermostat and heating/cooling system from shutting down due to lack of battery power in the thermostat.

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Remove thermostat from the base by pulling straight out.
REMOVE DURING INSTALLATION

M19919

Install three new AAA alkaline batteries so all positive ends alternate up, down, up.
NOTE: Always use AAA alkaline batteries.
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BATTERIES (3)

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Place the thermostat back on its base by aligning the terminal screw blocks with the pins on the back of the thermostat. Push the thermostat straight onto the base.
NOTE: All Program Schedule, Date and Time information is retained while the batteries are being replaced.
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Cleaning Your Thermostat Screen
The thermostat has a touch screen interaction. Follow these steps to clean the screen without making thermostat changes: 1. Press the Screen key. Thermostat locks out all touch keys for 30 seconds to allow for cleaning.

OK TO CLEAN SCREEN

M19964
Use damp cloth slightly moistened with water or household glass cleaner to clean the screen. Repeat the above steps, as necessary.
IMPORTANT Do not spray any type of liquid directly on the thermostat itself. If using household glass cleaner, spray cleaner on cloth. Then use a cloth to clean the thermostat screen. 4. Press the Done key to return to the Home Screen and normal operation.

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Reading Your Outdoor Temperature (Select Models)
If your thermostat has an outdoor sensor, the thermostat displays the outdoor temperature. VIEW OUTSIDE TEMPERATURE (SELECT MODELS) The outside temperature is located in the lower right corner of the Home Screen. If it is not on the Home Screen, view the outside temperature by pressing the More key until the outside temperature shows.

SAT AT

Set To Heat On

Outside

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Reading Your Remote Indoor Temperature (Select Models)
If your thermostat has a remote indoor temperature sensor installed, the thermostat displays the inside temperature on the screen from the remote sensor(s). (Then the thermostat internal temperature sensor is not used.)

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ONE REMOTE INDOOR SENSOR INSTALLED (SELECT MODELS) If one remote indoor temperature sensor is used, the screen showing the Inside temperature reading shows the temperature at the indoor remote sensor location. MULTIPLE REMOTE INDOOR SENSORS INSTALLED (SELECT MODELS) If more than one remote indoor sensor is used, the screen showing the Inside temperature reading shows the average of all the remote indoor sensors.

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Reminder Timers (Select Models)
These reminders notify you when to change your furnace filter, humidifier pad or ultraviolet lamp. When the time you set expires, the thermostat flashes Change and then Filter or Change and Humidifier Pad or Change and UV Lamp until you reset the timer.

Resetting Expired Timers

When a Timer expires, a Reset key appears on the Home Screen. Press Reset key to reset the Timer. Notice that the Change reminder disappears from the thermostat screen. If more than one Timer expires at the same time, press the Reset key to reset all expired Timers.

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View or Reset Timer Settings Before They Expire
1. 2. 3. 4. 5. Press More key until the Timer you want to modify appears on the screen. Press Edit key to change the Timer reload value. Use Up and Down arrow keys to change the number of Run Time Days. See Advanced Settings, steps 8 through 10, for approximate calendar days. Press the Done key to go back to viewing the selected timer. Press Reset key to reset the timer to the timer reload value. (This is the Advanced setting you set or the reload value you selected in step 2.) Press Done or Cancel key to return to the Home Screen.

Screen Locked

You can fully or partially lock out the keys on the touch screen interface. See Advanced Settings for information on turning these features on or off. If the thermostat shows Screen Locked, your thermostat screen is either fully or partially locked.
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SCREEN LOCKED

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Partially Locked Screen

When partially locked, the screen indicates Screen Locked for 5 to 7 seconds whenever the user attempts to press a key that is locked. Pressing a locked key while Screen Locked is shown flashes Screen Locked on the screen. Pressing an unlocked key while Screen Locked is active removes the screen lock. In this mode, all keys are locked except the Temperature Up and Down arrow keys: User can change temperature up or down but cannot change schedule settings. Temporary temperature change lasts until next scheduled period and that time shows on screen. To cancel temperature override and begin following schedule, press Cancel key. To unlock screen, see Advanced Settings section.

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Fully Locked Screen

In this mode, all keys are locked and not functional. To unlock screen, see Advanced Settings section. The screen continuously displays Screen Locked.
Reading Your Inside Humidity Level (Select Models)
Select models can sense the humidity level in the home. If your model has this feature, the humidity level in the home is shown in the lower right corner of the Home Screen. NOTE: If the thermostat has the optional outdoor temperature sensor (select models), the indoor humidity level is displayed by pressing the More key.

Humidity

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Controlling Your Inside Dehumidification Setting (Select Models)
Select models read the inside humidity level and set a desired humidity level to help control dehumidification in the home: 1. Press the More key until the inside humidity percent and dehumidification setpoint are shown.

DEHUMIDIFIER

M19967

2. 3. 4.

Use Up and Down arrow keys, located to the right of the dehumidifier setpoint, to set your desired humidity level (select models) for dehumidification in the summer. Press Done key to save your changes and return to the Home Screen. Press Cancel key to return to Home Screen without saving any changes.

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Dehumidification Control (Select Models)
If your thermostat has dehumidification control and you set a dehumidification setpoint, the thermostat attempts to control to this dehumidification setpoint by turning on the air conditioner. In extremely high humidity conditions, thermostat keeps the air conditioner running for up to 3F below your temperature setpoint. It does this when trying to achieve your desired humidity setpoint and balance that with your temperature setpoint.

Temperature Recovery

Your thermostat comes with a feature called Adaptive Intelligent Recovery, which eliminates all guesswork when setting your schedule. How long does it take the furnace to warm your house in the morning before you get out of bed or how long does it take the air conditioner to cool your house in the afternoon before you return from work? No problem.The thermostat determines that for you. Simply set your program schedule to the time you want the house to be at your comfort temperature. The thermostat then turns on the heating or cooling at just the right time to have your home reach your scheduled temperature at your scheduled time. For exampleyou get out of bed at 6:00 AM and want the temperature to be 70F. Set the Wake period for 6:00 AM and 70F. The thermostat then turns on the heat before 6:00 AM to raise the temperature to 70F by 6:00 AM. The thermostat alerts you that the heating or cooling system is coming on before a scheduled time by showing Recovery on the screen.
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Recovery

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IMPORTANT It takes about a week for the thermostat to adjust to local weather, your schedule, the construction of your home and your heating and/or cooling system. Your thermostat learns from experience. Each day it checks how closely it reached the recovery time and adjusts the next days recovery start time accordingly.
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Advanced Heat Pump Features (Select Models)
If you have a heat pump heating system, your thermostat can use some special features when used with an Outdoor Temperature Sensor, such as compressor and/or backup heat lockout based on outside temperature. For example, if your backup heat does not turn on above a designated outside temperature, your system uses an advanced heat pump feature.

Setting Calendar

This thermostat is designed to automatically keep current time and day in memory for up to ten years, under normal use, once the calendar is set. There are two ways to set the calendar for this thermostat: SETTING CALENDAR AFTER THERMOSTAT IS ALREADY FUNCTIONING See steps 1 through 4, in the Advanced Settings section, to set year, month and day. SETTING CALENDAR WHEN THERMOSTAT IS FIRST POWERED When this thermostat is first powered, the display is ready to set the calendar.
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SET CURRENT DAY SET MONTH

FRI RI

USE ARROWS TO SET YEAR AND TIME
OK TO PICK MULTIPLE DAYS SCREEN LOCKED U CHANGE FILTER UV LAMP HUMIDIFIER PAD R

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Advanced Settings

Your thermostat has many advanced settings to match your heating and cooling system. But you can change these settings to match your lifestyle: 1. From the Home Screen, press the System key. Five blank touch keys show on the bottom of the screen between the Done and Cancel keys. 2. Press and hold the center blank key for approximately five seconds.

SYSTEM EM HEAT

OFF COOL

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The User Setup Number is displayed in the lower-left screen. It is a four-digit code beginning with zero. Current setting is displayed in lower-right screen.
ADVANCE TO NEXT USER SETUP CURRENT SETTING

USER SETUP NUMBER

SAT SAT
OK TO PICK MULTIPLE DAYS SCREEN LOCKED CHANGE FILTER UV LAMP HUMIDIFIER PAD

PRESS TO EXIT USER SETUP

CHANGE THE CURRENT SETTING

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Step 1. User Setup Number 0120: First Two Digits of Current Calendar Year.
To change current setting, press the Up or Down arrow key to the right of the two-digit number in the lower right corner of the screen. Options: 20 equals years 20xx. 21 equals years 21xx. To Change to the next Setup Number, press the Up arrow key to the right of 0120. To go back to the previous Setup Number, press the Down arrow key.

Step 2. User Setup Number 0130: Last Two Digits of Current Calendar Year.
To change Options, press the Up or Down arrow key to the right of the two-digit number in the lower right corner of the screen. Options: 01 through 99 equals years 2001 through 2099. To Change to the next Setup Number, press the Up arrow key to the right of 0130.To go back to the previous Setup Number, press the Down arrow key.
Step 3. User Setup Number 0140: Current Calendar Month.
To change Options, press the Up or Down arrow key to the right of number in lower right corner of the screen. Options: 1 through 12 equals January through December. To Change to the next Setup Number, press the Up arrow key to the right of 0140. To go back to the previous Setup Number, press the Down arrow key.

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Step 4. User Setup Number 0150: Current Calendar Date.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options:1 through 31 equals 1st of a month to 31st of a month. To Change to the next Setup Number, press the Up arrow key to the right of 0150. To go back to the previous Setup Number, press the Down arrow key.
Step 5. User Setup Number 0160: Schedule Options.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: 0 nonprogrammable. Thermostat is nonprogrammable. 4 programmable. Thermostat is fully programmable, allowing all 7 days to be programmed. To Change to the next Setup Number, press the Up arrow key to the right of 0160.To go back to the previous Setup Number, press the Down arrow key.
Step 6. User Setup Number 0320: Display Temperature Shown in F or C.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: 0 Fahrenheit. 1 Celsius. To Change to the next Setup Number, press the Up arrow key to the right of 0320. To go back to the previous Setup Number, press the Down arrow key.

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Step 7. User Setup Number 0330: Daylight Savings On or Off.

To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: 0 Off. Thermostat time is not automatically adjused for Daylight Savings in Fall and Spring. 1 On. Thermostat time is automatically adjusted for Daylight Savings in Fall and Spring. To Change to the next Setup Number, press the Up arrow key to the right of 0330.To go back to the previous Setup Number, press the Down arrow key.
Step 8. User Setup Number 0500: Furnace Air Filter Timer.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: 0 Off. Thermostat furnace filter timer is off. fan run time days (about one month). fan run time days (about three months). fan run time days (about six months). fan run time days (about nine months). fan run time days (about one year). fan run time days (about three years). To Change to the next Setup Number, press the Up arrow key to the right of 0500.To go back to the previous Setup Number, press the Down arrow key.
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Step 9. User Setup Number 0510: Humidifier Pad Timer.
To change Options, press the Up or Down arrow key to the right of the number in lower right corner of the screen. Options: 0 Off. Thermostat humidifier pad timer is off. months. months. months. To Change to the next Setup Number, press the Up arrow key to the right of 0510. To go back to the previous Setup Number, press the Down arrow key.
Step 10. User Setup Number 0520: UV Lamp Timer.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: 0 Off. Thermostat Ultraviolet Lamp timer is off. year. To Change to the next Setup Number, press the Up arrow key to the right of 0520. To go back to the previous Setup Number, press the Down arrow key.
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Step 11. User Setup Number 0540: Number of Schedule Periods Available to Program.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of screen. Options: 2 two program periods available (Wake and Sleep). 4 four program periods available (Wake, Leave, Return and Sleep). To Change to the next Setup Number, press the Up arrow key to the right of 0540. To go back to the previous Setup Number, press the Down arrow key.
Step 12. User Setup Number 0640: Time Format.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: hour clock. hour clock. To Change to the next Setup Number, press the Up arrow key to the right of 0640. To go back to the previous Setup Number, press the Down arrow key.

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Step 13. User Setup Number 0670: Screen Lockout Function.
To change Options, press the Up or Down arrow key to the right of the number in the lower right corner of the screen. Options: 0 All keys are available. Screen is unlocked. 1 Screen is partially locked. All key functions are locked except the Temperature Up and Down keys and the Cancel key. Enter Advanced Setup to unlock the screen. 2 Screen is fully locked. Enter Advanced Settings to unlock the screen.

Step 14. Exit User Setup

Press the Done key to exit Advanced Settings and return to the Home Screen.
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Frequently Asked Questions and Answers
Q: Some or all keys on the display do not work; why? A: Thermostat screen is locked. See Advanced Setting section to unlock keys on the screen. Q: Backlighting seems dim; is it designed to be dim? A: In models that use batteries for power, install fresh AAA alkaline batteries. Q: Thermostat is asking for heating or cooling to come on (screen shows Heat On or Cool On in display) but there is no heating or cooling running. A: Call your local heating and/or cooling contractor to check your heating and/or cooling system. Q: Under the Fan on the screen, Auto and On or Auto and Circ are shown. What does this mean? A: The Fan is programmed for either On or Circulate. See the Fan Schedule section for more information. Q: Why doesnt the thermostat respond when I touch the keys? A: Check to determine if the screen is in the Locked or Clean mode. See Screen Locked or Cleaning Thermostat Screen sections.

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Limited Five-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 five (5) years 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 Return Goods Dock 4 MN10-Douglas Dr N Golden Valley, MN 55422 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 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, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limite, 35 Dynamic Drive, Scarborough, Ontario M1V4Z9. 43 69-1701

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CUSTOMER ASSISTANCE

If you have any questions about the operation of your thermostat, please go to www.honeywell.com/yourhome, or call Honeywell Customer Care toll-free at 1-800-468-1502.
Automation and Control Solutions
Honeywell International Inc. 1985 Douglas Drive North Golden Valley, MN 55422 Honeywell Limited-Honeywell Limite 35 Dynamic Drive Scarborough, Ontario M1V 4Z9
Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers.

G.H. 03-04

www.honeywell.com/yourhome

Installation Guide

Touch-screen Programmable Thermostat
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 thermostat from wallplate and turn over to find model number)

System Types

Gas, oil, or electric heat with air conditioning Warm air, hot water, highefficiency furnaces, heat pumps, steam, gravity
This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Materialspecial handling may apply, See www.dtsc.ca.gov/hazardouswaste/perchlorate
For assistance with this product please visit http://yourhome.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502
U.S. Registered Trademark. US Patent No. 6595430, D509151 and other patents pending. Copyright 2007 Honeywell International Inc. All rights reserved.

Cool only

Need Help?
Heat only two-wire systems, power to open and close zone valves (Series 20), and normallyopen zone valves Heat only with fan 750 mV heating systems

69-1896EF-1

VisionPRO TH8000 Series

Wallplate installation

1. Separate wallplate from thermostat. 2. Mount wallplate as shown below. Grasp top and bottom of wallplate and pull to remove from thermostat.

Wall anchors

Must be installed by a trained, experienced technician
Read these instructions carefully. Failure to follow these instructions can damage the product or cause a hazardous condition.
CAUTION: ELECTRICAL HAZARD Can cause electrical shock or equipment damage. Disconnect power before beginning installation. MERCURY NOTICE If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.

Wire hole

Drill 3/16 holes for drywall. Drill 7/32 holes for plaster.

Mounting screws

Power options
For 24VAC primary power, connect common side of transformer to C terminal.

Wiring

Remove factory-installed jumper only for two-transformer systems.
Terminal Designations Shaded areas below apply only to TH8320/TH8321.
Conventional Terminal Letters: R Heating power. Connect to secondary side of heating system transformer. Rc Cooling power. Connect to secondary side of cooling system transformer. C Common wire from secondary side of cooling transformer (if 2 transformers). W 1st stage heat relay. W2 2nd stage heat relay. Y 1st stage compressor contactor. Y2 2nd stage compressor contactor. G Fan relay. S1 Optional outdoor or remote sensor. S2 Optional outdoor or remote sensor. Heat Pump Terminal Letters: R Heating power. Connect to secondary side of heating system transformer. Rc Cooling power. Connect to secondary side of cooling system transformer. C Common wire from secondary side of cooling system transformer. Y 1st stage compressor contactor. Y2 2nd stage compressor contactor. Aux Auxiliary heat relay. G Fan relay. E Emergency heat relay. L Heat pump reset (powered continuously when System is set to Em Heat; system monitor when set to Heat, Cool or Off). O/B Changeover valve for heat pumps. S1 Optional outdoor or remote sensor. S2 Optional outdoor or remote sensor.
Push excess wire back into the wall opening. Plug wall opening with non-flammable insulation.
Insert supplied batteries for primary or backup power.
Wiring guideconventional systems
Shaded areas below apply only to TH8320/TH8321.
1H/1C System (1 transformer)
Rc R W Y G C S1 S2 Power [1] [R+Rc joined by jumper] Heat relay Compressor contactor Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor
1H/1C System (2 transformers)
Rc R W Y G C S1 S2 Power (cooling transformer) [1, 2] Power (heating transformer) [1, 2] Heat relay Compressor contactor Fan relay 24VAC common [3, 4] Optional outdoor/remote sensor Optional outdoor/remote sensor

Heat Only System

Rc R W C S1 S2 Power [1] [R+Rc joined by jumper] Heat relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor
Heat Only System With Fan

Rc R W G C S1 S2

Heat Only System (Series 20)

Rc R W Y C S1 S2

2H/2C System (1 transformer)

Y2 W2 Rc R W Y G C S1 S2

[R+Rc joined by jumper] Series 20 valve terminal R [1] Series 20 valve terminal B Series 20 valve terminal W 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor

[1] [2] [3] [4]

Cool relay 2 Heat relay 2 Power [1] [R+Rc joined by jumper] Heat relay 1 Cool relay 1 Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor

See [notes] below

Power supply. Provide disconnect means and overload protection as required. Remove jumper for 2-transformer systems. Optional 24VAC common connection. Common connection must come from cooling transformer.

Cool Only System

Rc R Y G C S1 S2 Y2 W2 Rc R W Y G C S1 S2
2H/2C System (2 transformers)
Cool relay 2 Heat relay 2 Power (cooling transformer) [1, 2] Power (heating transformer) [1, 2] Heat relay 1 Cool relay 1 Fan relay 24VAC common [3, 4] Optional outdoor/remote sensor Optional outdoor/remote sensor
Power [1] [R+Rc joined by jumper] Heat relay Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor
Power [1] [R+Rc joined by jumper] Compressor contactor Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor
Wiring guideheat pump systems
1H/1C Heat Pump (no auxiliary heat)
Rc R O/B Y G C S1 S2 Power [1] [R+Rc joined by jumper] Changeover valve [5] Compressor relay Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor
2H/2C Heat Pump (no auxiliary heat)
Y2 Rc R O/B Y G C S1 S2 Compressor 2 relay Power [1] [R+Rc joined by jumper] Changeover valve [5] Compressor 1 relay Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor
2H/1C Heat Pump (with auxiliary heat)
L E Aux Rc R O/B Y G C S1 S2 Equipment monitor [6, 7] Emergency heat relay [8] Auxiliary heat relay (Heat 2) [8] Power [1] [R+Rc joined by jumper] Changeover valve [5] Compressor relay Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor

3H/2C Heat Pump (with auxiliary heat)
Y2 L E Aux Rc R O/B Y G C S1 S2 Compressor 2 relay Equipment monitor [6, 7] Emergency heat relay [8] Auxiliary heat relay (Heat 2) [8] Power [1] [R+Rc joined by jumper] Changeover valve [5] Compressor 1 relay Fan relay 24VAC common [3] Optional outdoor/remote sensor Optional outdoor/remote sensor

[1] [3] [5] [6] [7]

Power supply. Provide disconnect means and overload protection as required. Optional 24VAC common connection. O/B set to control as either O or B in installer setup. If L terminal is used, 24VAC common (terminal C) must be connected. Heat pump reset (powered continuously when thermostat is set to Em. Heat; system monitor when set to Heat, Cool, or Off). [8] Install field jumper between Aux and E terminals if there is no emergency heat relay.
Remove tab and mount thermostat

Remove tab.

Align pins on back of thermostat with slots in wallplate, then push gently until thermostat snaps into place.

Set date and time

Press st to set date Press st to set month Press st to set year

Press st to set time

1:00 PM
Press DONE to save changes.
Press DONE to save and exit.

Installer setup

Press SYSTEM.
Press and hold these two buttons until the display changes.

SYSTEM

6:00aM

Inside

CANCEL
Change settings as required (see pages 7-9).

Function

Setting
Press st to select function
Press st to change setting
Press DONE to exit & save settings.
Shaded areas below apply only to TH8320/TH8321. Year (first two digits) Year (second two digits) Month Date Schedule format System type
20 (2000-2078) 21 (2101-2178)
0180 Fan control (heating) Changeover valve (O/B terminal) Auxiliary heat External fossil fuel kit 1st stage compressor cycle rate 2nd stage compressor cycle rate
6 [Other options: 1-12] 15 [Other options: 1-31] 4 7-day programming 0 Non-programmable Electric backup heat 1 Fossil fuel backup heat
06 (2006) [Other options: 00-99]
1 heat/1 cool conventional 1 heat/1 cool heat pump (no aux. heat) Heat only (2-wire systems) Heat only with fan Hot water Series 20 system (power to open & close zone valves/normally open zone valves) 6 Cool only heat/1 cool heat pump (with aux. heat) heat/2 cool multistage conventional heat/1 cool multistage conventional heat/2 cool multistage conventional heat/2 cool heat pump (no aux. heat) heat/2 cool heat pump (with aux. heat) 0 Gas/Oil heat (equipment controls heating fan) 1 Electric furnace (thermostat controls heating fan) 0 O/B terminal controls valve in cooling 1 O/B terminal controls valve in heating

1 External fossil fuel kit controls backup heat 0 Thermostat controls backup heat (outdoor sensor required) 3 Recommended for most compressors [Other options: 1, 2, 4, 5 or 6 CPH] 3 Recommended for most compressors [Other options: 1, 2, 4, 5 or 6 CPH] Continued on next page

Setup functions

Settings & Options
(factory default in bold)
Setup functions Settings & Options
Shaded areas below apply only to TH8320/TH8321. 0240 First stage heat cycle rate (CPH= cycles per hour) Gas or oil furnaces of less than 90% efficiency Steam or gravity systems Hot water systems & furnaces of 90%+ efficiency Electric furnaces [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH] Gas or oil furnaces of less than 90% efficiency Steam or gravity systems Hot water systems & furnaces of 90%+ efficiency Electric furnaces [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH] Electric auxiliary heat or electric furnaces Steam or gravity systems Hot water systems & furnaces of 90%+ efficiency Gas or oil furnaces of less than 90% efficiency [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH] Electric emergency heat Steam or gravity systems Hot water systems & furnaces of 90%+ efficiency Gas or oil furnaces of less than 90% efficiency [Other options: 2, 4, 6, 7, 8, 10, 11, 12 CPH]
Second stage heat cycle rate (CPH)
Third stage heat cycle rate (CPH)

Backlight

Manual/Auto changeover
Auto changeover deadband Temperature display
0330 Daylight savings 0340 Remote sensor 0380 Heat pump compressor lockout Heat pump auxiliary lockout Dehumidification control

0 Fahrenheit 1 Celsius

Emergency heat cycle rate (CPH)
0 Backlight on for approx. 8 seconds after keypress 1 Backlight always on low intensity, full bright after keypress (requires 24VAC connection) 0 Manual changeover (Heat/Cool/Off) 1 Automatic changeover (Heat/Cool/Auto/Off) 3 Heat/cool temperature 3F apart (1.5C) * See page 11 * [Other options: 2-9 (2F to 9F/1C to 5C)]
2 Auto-change to daylight savings time (2007 and beyond, for areas that use the new 2007 DST calendar) 1 Auto-change to daylight savings time (through 2006, and for areas that do not use the new 2007 DST calendar) 0 Daylight savings time is turned off No remote sensor Outdoor sensor (display only) Outdoor control sensor (select heat pumps) ** See page 11 Indoor sensor

0 No heat pump compressor lockout [Other options: 15, 20, 25, 30, 35, 40F (-9.5C to 7C)] 0 No heat pump auxiliary lockout [Other options: 40, 45, 50, 55, 60F (4.5C to 15.5C)] 0 No dehumidification control 1 Thermostat controls dehumidification with air conditioner ** See page 11 Continued on next page
Furnace filter change reminder
Off 10-day run time (about 1 month) 30-day run time (about 3 months) 60-day run time (about 6 months) 90-day run time (about 9 months) 120-day run time (about 1 year) 365-day run time (about 3 years) Off 90 calendar days 180 calendar days 365 calendar days

0660 0670

UV lamp change reminder Adaptive Intelligent Recovery Program periods Compressor protection Heat temperature range stop Cool temperature range stop Clock format
0 Off calendar days 1 On 0 Off

** See page 11

Extended fan timer (cool) Keypad lock 0680 Heat temperature control Cool temperature control Temperature display offset RESET
Extended fan timer (heat)
program periods (Wake, Leave, Return, Sleep) program periods (Wake, Sleep) minute compressor off time ** See page 11 [Other options: 0, 1, 2, 3 or 4-minute off time] 90 Max. heat temperature setting is 90F (32C) [Other options: 40-89F (4C to 32C)] 50 Min. cool temperature setting is 50F (10C) [Other options: 51-99F (11C to 37C)] 12 12-hour time (i.e., 3:30 pm) 24 24-hour time (i.e., 15:30) 0 Off 90 Fan runs for 90 seconds after call for heat ends 0 Off 90 Fan runs for 90 seconds after call for cooling ends 0 Keypad unlocked (fully functional) 1 Partially locked (access to temperature settings only) 2 Fully locked 2 Standard temperature control (recommended) 1 Choose if room is warmer than set temperature 3 Choose if room does not reach set temperature 2 Standard temperature control (recommended) 1 Choose if room is cooler than set temperature 3 Choose if room does not reach set temperature Thermostat displays actual room temperature [Other options: -3, -2, -1, 1, 2, 3F offset (-1.5C to 1.5C)
0 No reset 1 Reset installer options & program schedule to factory default (only date and time settings are retained)
Humidifier pad change reminder

Installer system test

During installer setup, press t repeatedly until Test appears.

Test number

System status
Press st to change status
Press DONE to terminate testing.
Shaded areas below apply only to TH8320/TH8321. System test 1 Cooling system System status 1 2
Fan system Heating system
4 Emergency heating system
CAUTION: EQUIPMENT DAMAGE HAZARD. Compressor protection is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
Compressor and fan turn off Compressor and fan turn on Second stage compressor turns on Fan turns off Fan turns on

Heat and fan turn off Heat turns on (fan on if Function 0170 is set for heat pump, or if Function 0180 is set to 1) ** See page 6 Second stage heat turns on Third stage heat turns on Heat and fan turn off Heat and fan turn on Second stage heat turns on (Auxiliary heat)]

Press st to select test

Special functions
Shaded areas below apply only to TH8320/TH8321. Auto Changeover (Setup Function 0300): When set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 2 degrees apart. If function 0380 is set to On, the heat and cool settings must be at least 5 degrees apart. Remote Sensor (Setup Function 0340): If an optional outdoor sensor is installed, the thermostat can display the outside temperature. If an optional remote indoor sensor is installed, the thermostat will display the temperature at the sensor location (the internal sensor in the thermostat is not used). Adaptive Intelligent Recovery (Setup Function 0530): 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 scheduled time.
Dehumidification control (Setup Function 0380): TH8321 models monitor the indoor humidity level and automatically activate the cooling system to reduce humidity by lowering the temperature by up to 3 degrees below the current cool setting. Heat Pump Temperature Lockout (with fossil-fuel backup): If the thermostat is installed with an optional outdoor sensor, you can select a compressor lockout temperature (Function 0350). When the outdoor temperature is below the lockout temperature, only the auxiliary heat operates. When the outdoor temperature is above the lockout temperature, only the compressor operates. Heat Pump Temperature Lockouts (with electric heat backup): If the thermostat is installed with an optional outdoor sensor, you can select a compressor lockout temperature (Function 0350) and/or an auxiliary heat lockout temperature (Function 0360). When the outdoor temperature is below the compressor lockout temperature, only the auxiliary heat operates. When the outdoor temperature is above the auxiliary lockout temperature, only the compressor operates. If the outdoor temperature is between the compressor and auxiliary lockout temperatures, both the compressor and auxiliary heat can operate.
Accessories & replacement parts
Please contact your distributor to order replacement parts.
Outdoor temperature sensor. Part Number C7089U1006 Remote indoor temperature sensor. Part Number C7189U1005 Cover plate*... Part Number 32003796-001 *(Use to cover marks left by old thermostats.)