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Operating Manual  
®
VisionPRO TH8000 Series  
Touchscreen Programmable Thermostat  
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BE CAREFUL! Never use sharp instruments, such as a pencil  
or pen, to press touchscreen keys. To prevent damage to the  
thermostat, always press 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 thermostat from wallplate and turn over to find model number)  
M29343  
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  
Read and save these instructions.  
®
U.S. Registered Trademark.  
US Patent No. 6595430, D509151 and other patents pending.  
Copyright © 2009 Honeywell International Inc. All rights reserved.  
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®
VisionPRO TH8000 Series  
Table of contents  
About your new thermostat  
Appendices  
Battery replacement............................ 20  
Advanced functions ............................ 21  
In case of difficulty.............................. 26  
Optional remote sensors .................... 28  
Limited warranty.................................. 29  
Thermostat features.............................. 2  
Programming at a glance ..................... 3  
Quick reference to controls .................. 4  
Quick reference to status display ........ 5  
Programming & Operation  
Clock setting.......................................... 6  
Fan setting............................................. 7  
System setting....................................... 8  
Using program schedules..................... 9  
Program schedule overrides .............. 12  
Vacation hold....................................... 14  
Special features................................... 15  
Screen lock.......................................... 16  
Screen cleaning................................... 17  
Humidity display & control.................. 18  
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 oper-  
ate cooling system when outdoor  
temperature is below 50˚F (10˚C).  
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Operating Manual  
About your new thermostat  
Congratulations! You’ve just purchased the world’s most advanced, easy-to-use ther-  
mostat. It has been designed to give you many years of reliable service and touch-  
screen climate control.  
Features  
7-day program schedules maximize comfort and economy.  
Armchair programming: Just pull thermostat from the wall to set schedules.  
®
EnergyStar compliant to greatly reduce your heating/cooling expenses.  
One-touch temp control overrides program schedule at any time.  
Precise comfort control keeps temperature within 1°F of the level you set.  
Change/check reminders 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 display and control summer humidity.  
Select models accommodate optional outdoor or indoor remote sensors.  
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®
VisionPRO TH8000 Series  
TA hb ios u tt h ye or um ro ns et aw t ti sh er re ma do ys t tao t go!  
Your new thermostat is pre-programmed and ready to go. Just set the time and day.  
Then check the settings below and change if needed:  
1
2
3
4
. Set clock........................................................................................................See page 6  
. Select fan setting: Preset to Auto..............................................................See page 7  
. Select system setting: Preset to Heat ......................................................See page 8  
. Program schedules: Preset to energy-saving levels  
while you’re at work or asleep (assumes you  
wake at 6 am, leave at 8 am, return at 6 pm  
and go to bed at 10 pm).......................................................................See pages 10-13  
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time,  
and manually adjust the temperature (see pages 12-14).  
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Operating Manual  
Quick reference to controls  
Press day(s) to set program schedule (see page 11)  
Press to select fan  
MON  
TUE  
WED  
THU  
FRI  
SAT  
SUN  
Press to adjust  
operation (see page 7)  
OK TO PICK MULTIPLE DAYS  
temperature settings  
(see pages 11-14)  
FAN  
Inside  
Set To  
Press to select system  
type (see page 8)  
AUTO  
70  
70  
Following  
Schedule  
SYSTEM  
Press to set program  
schedule (see page 11)  
Press for more options  
(select models only)  
HEAT  
AM  
6
SCHED  
:01  
HOLD  
CLOCK SCREEN MORE  
M29344  
Press to override  
program schedule  
Press to set clock  
(see page 6)  
Press to lock keypad for 30  
seconds to clean screen  
(see page 17)  
(see pages 12-14)  
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Quick reference to status display  
Current inside temperature  
Current day of week  
Temperature setting  
WED  
FAN  
Inside  
Set To  
Fan setting  
AUTO  
70  
7
0
Program schedule on  
(does not display  
when off)  
Following  
Schedule  
Recovery  
SYSTEM  
System setting  
Current time  
HEAT  
AM  
6
:01  
HOLD  
SCHED  
CLOCK SCREEN MORE  
Adaptive Intelligent  
M29345  
Recovery in effect  
see page 15)  
(
Other display messages:  
Cool On: Cooling system is activated  
Heat On: Heating system is activated  
Aux Heat On: Auxiliary heating system is activated  
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Clock setting  
Press CLOCK  
To set the current time display, press CLOCK,  
then press s or t to adjust the time. Press  
and hold s or t to advance the time more  
quickly.  
AM  
6
:01  
HOLD  
SCHED  
CLOCK SCREEN MORE  
Press DONE to save & exit (or press CANCEL to  
M29346  
exit without changing the time).  
Adjust time, then press DONE  
Note: The real-time clock should never require  
adjustment since it automatically updates for  
daylight savings time, and stores all date/time  
information.  
AM  
6
:02  
Note: To change the current week day display, see  
page 22.  
DONE  
CANCEL  
M29347  
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Fan setting  
Press FAN to select fan operation, then press  
WED  
DONE.  
FAN  
Inside  
Set To  
On: Fan is always on.  
AUTO  
70  
7
0
Auto: Fan runs only when the heating or  
cooling system is on.  
Following  
Schedule  
SYSTEM  
HEAT  
Circ: Fan runs randomly, about 35% of the  
time, not counting any run time with the  
heating or cooling system.  
AM  
6
SCHED  
:01  
HOLD  
CLOCK SCREEN MORE  
You can press FAN to override the fan settings  
you’ve programmed for different time periods  
M29348  
Press FAN  
(
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.  
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System setting  
Press the SYSTEM button to select, then press  
DONE.  
WED  
FAN  
Inside  
Set To  
Heat: Thermostat controls only the  
AUTO  
70  
7
0
heating system.  
Following  
Schedule  
SYSTEM  
Cool: Thermostat controls only the  
HEAT  
cooling system.  
AM  
6
SCHED  
:01  
HOLD  
Off: Heating and cooling systems are off.  
CLOCK SCREEN MORE  
Auto: Thermostat automatically selects  
heating or cooling depending on the  
indoor temperature.**  
M29349  
Em Heat (only for heat pumps with  
auxiliary heat): Thermostat controls  
Emergency and Auxiliary Heat.  
Compressor is locked out.**  
*
* Select models only  
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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.  
WAKE  
Set to the time you awaken and the temperature you want  
during the morning, until you leave for the day.  
6:00 am  
°
7
0
LEAVE  
Set to the time you leave home and the temperature you  
want while you are away (usually an energy-saving level).  
8:00 am  
°
6
6
2
RETURN Set to the time you return home and the temperature you  
:00 pm  
want during the evening, until bedtime.  
°
7
1
0
SLEEP  
0:00 pm  
Set to the time you go to bed and the temperature you want  
overnight (usually an energy-saving level).  
6
2 °  
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EnergyStar settings for maximum cost savings  
®
Thisthermostatispre-settouseEnergyStar programsettings.Werecommendthesesettings,since  
theycanreduceyourheating/coolingexpensesbyasmuchas33%.(Seenextpagetoadjusttimes  
and temperatures of each time period.)  
Heat (Mon-Fri) Cool (Mon-Fri) Heat (Sat-Sun) Cool (Sat-Sun)  
Wake  
70 °  
62 °  
70 °  
62 °  
78 °  
85 °  
78 °  
82 °  
70 °  
78 °  
(
6:00 am)  
Leave  
8:00 am)  
°
°
6
2
85  
°
78  
(
[
Or cancel period]  
[Or cancel period]  
Return  
6:00 pm)  
°
7
0
(
[
Or cancel period]  
[Or cancel period]  
Sleep  
10:00 pm)  
62 °  
82 °  
(
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To adjust program schedules  
Press SCHED  
1. Press SCHED, then EDIT.  
SCHED  
HOLD  
CLOCK SCREEN MORE  
2. Press day buttons (MON-SUN) to select  
day(s).  
M29350  
3
4
5
. Press s or t to set Wake time for selected  
Press EDIT  
day(s).  
. Press s or t to set Heat and Cool  
temperature for this time period.  
. Press other time periods (LEAVE, RETURN,  
SLEEP) to set time and temperatures for  
each.  
DONE  
EDIT  
WAKE  
LEAVE RETURN SLEEP CANCEL  
M29351  
Select day(s)  
Set heat/cool levels  
MON  
TUE  
WED  
THU  
FRI  
SAT  
SUN  
OK TO PICK MULTIPLE DAYS  
FAN  
AUTO  
6
. Press DONE to save & exit (or press CANCEL  
to exit without saving changes).  
HEAT  
70  
CANCEL  
PERIOD  
Note: You can press CANCEL PERIOD to eliminate any  
unwanted time period.  
AM  
COOL  
6
:00  
78  
Note: Press FAN to customize fan settings for any  
time period (see page 7).  
DONE  
WAKE  
LEAVE RETURN SLEEP CANCEL  
M29352  
Set time for program  
period to start  
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Program schedule override (temporary)  
Adjust temperature  
Press s or t to immediately adjust the tem-  
perature. This will temporarily override the  
temperature setting for the current time period.  
WED  
FAN  
Inside  
Set To  
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.  
AUTO  
73  
7
0
Heat On  
SYSTEM  
Hold Temperature  
HEAT  
Until  
AM  
8
SCHED  
:00  
HOLD CLOCK SCREEN MORE  
CANCEL  
To cancel the temporary setting at any time,  
press CANCEL (or SCHED). The program schedule  
will resume.  
M29353  
Press to set timer  
Press CANCEL (or SCHED) to  
resume program schedule  
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Program schedule override (permanent)  
Press HOLD  
Adjust temperature  
Press HOLD to permanently adjust the  
temperature. This will turn off the program  
schedule.  
WED  
FAN  
Inside  
Set To  
Whatever temperature you set will be  
maintained 24 hours a day until you manually  
change it or press CANCEL (or SCHED) to cancel  
AUTO  
73  
7
0
Heat On  
SYSTEM  
Hold” and resume the program schedule.  
HEAT  
AM  
8
SCHED  
:00  
HOLD CLOCK SCREEN MORE  
Permanent  
Hold  
CANCEL  
M29354  
Press CANCEL (or SCHED) to  
resume program schedule  
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Vacation hold  
1
. Set temperature  
This feature can suspend the program sched-  
FAN  
ule for extended periods of time.  
Inside  
Set To  
AUTO  
55  
7
0
Press s or t to set the temperature you want,  
then press s or t to set the time of day you  
want the schedule to resume when you return.  
Press HOLD twice, then press s or t to select  
the number of days.  
SYSTEM  
Hold Temperature  
HEAT  
Until  
AM  
6
:00  
HOLD CLOCK SCREEN MORE  
SCHED  
Whatever temperature you set will be main-  
tained 24 hours a day for the number of days  
you select. After this number of days have  
elapsed, the previously programmed schedule  
will resume at the time you set.  
CANCEL  
M29355