Honeywell PRESTIGE THX9321 User manual

Operating
Manual
Prestige®THX9321/9421
Touch-screen Thermostat
69-2493EFS-05

Read and save these instructions.
® U.S. Registered Trademark.
Copyright © 2013 Honeywell International Inc.
All rights reserved.
Your new thermostat is pre-programmed and ready to go. Just check the settings
below and change if needed:
1. Set date and time ....................................................................................See page 4
2. Select fan setting ....................................................................................See page 5
3. Select system setting .............................................................................See page 6
4. Program schedules: Preset for maximum cost savings............... See pages 7-10
5. Set humidification & dehumidification controls ....................... See pages 17-19
About your new thermostat
ONE-TOUCH TEMP CONTROL: You can override the program schedule at any time, and manually
adjust the temperature (see pages 9-10).
Need Help?
For assistance please visit http://yourhome.honeywell.com, or call toll-free:
1-800-468-1502 (if product is used in a home)
1-888-245-1051 (if product is used in a workplace)

Prestige®THX9321/THX9421 Thermostat
169-2493EFS—05
Programming & Operation
Quick reference ..................................2
Date/time settings ..............................4
Fan settings ........................................5
System settings ..................................6
Energy Saver settings ........................7
Using program schedules..................8
Schedule overrides.............................9
Menu options
System status ...................................11
Vacation/event scheduler.................12
Humidity controls .............................17
Ventilation controls...........................20
Preferences menu.............................21
Temporary schedule changes..........22
Screen cleaning ................................23
Security settings...............................24
Installer contact information............25
Advanced features ...........................26
Appendices
Installer options ................................27
Battery replacement.........................28
Humidity display ...............................30
Optional accessories........................31
In case of difficulty ...........................34
Limited warranty...............................35
Table of contents
CAUTION: EQUIPMENT DAMAGE HAZARD.To prevent possible compressor damage, do
not operate cooling system when outdoor temperature is below 50˚F (10˚C).
This thermostat contains a Lithium battery which may contain Perchlorate
material. Special handling may be required. See www.dtsc.ca.gov/
hazardouswaste/perchlorate.

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Control fan operation
(see page 5)
Display
home screen
Change date or
time (see page 4)
Outdoor
temperature
and humidity
Current system
status
Display menu
options (see
pages 11-26)
Adjust
temperature
settings (see
pages 9-10)
Current program status Indoor temperature and
humidity
Quick reference: residential use
Select system
type (see page 6)
Outdoor temperature and humidity are displayed
only if an optional outdoor air sensor is installed.

Prestige®THX9321/THX9421 Thermostat
369-2493EFS—05
Control fan operation
(see page 5)
Display
home screen
Change date or
time (see page 4)
Outdoor
temperature
and humidity
Current system
status
Display menu
options (see
pages 11-26)
Adjust
temperature
settings (see
pages 9-10)
Indoor
temperature
and humidity
Press to override program
temporarily Thermostat location and
current program status
Quick reference: commercial use
Select system
type (see page 6)
Outdoor temperature and humidity are displayed
only if an optional outdoor air sensor is installed.

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69-2493EFS—05
Date/time settings
Press arrow buttons to change
Press date/time display
Press to select date or time
To set the date or time, press the date/
time display, then select SET TIME or SET
DATE.
Press the s or t buttons until the
proper time/date is displayed, then
press DONE to save and exit (or press
CANCEL to exit without changing the
time).
The thermostat will switch to and from
Daylight Saving Time automatically.
MCR32960

Prestige®THX9321/THX9421 Thermostat
569-2493EFS—05
fan idle
Automatic
MCR32962
FAN
MCR32961
• On: Fan is always on.
• Automatic: Fan runs only when
heating or cooling system is on.
• Circulate: Fan runs randomly, about
35% of the time (residential models
only).
• Follow Schedule: Fan controlled by
program (see pages 7-8).
Fan settings
In commercial use, the CIRCULATE option is
not available.
Press FAN
Press any displayed option
In commercial use, press AUTOMATIC or ON
to temporarily override the programmed fan
schedule.

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Automatic
MCR32964
SYSTEM
MCR32963
System settings
Press any displayed option
Press SYSTEM, then select any option
(press s or t to scroll menu):
• Heat: Thermostat controls only the
heating system.
• Cool: Thermostat controls only the
cooling system.
• Automatic: Thermostat selects
heating or cooling as needed.
• Off: Heating and cooling system is
off. Fan will still operate if fan is set to
On or Circulate.
• Emergency Heat (only for heat
pumps with auxiliary heat):
Thermostat controls Auxiliary Heat.
Compressor is not used.
Press HELP for more information about
these options.
Press SYSTEM

Prestige®THX9321/THX9421 Thermostat
769-2493EFS—05
These default Energy Saver settings can reduce expenses. (See next page to cus-
tomize each time period.)
Energy Saver settings for maximum cost savings
Wake 6:00 am 70° 78° 70° 78°
Leave 8:00 am 62° 85° 62° 85°
Return 6:00 pm 70° 78° 70° 78°
Sleep 10:00 pm 62° 82° 62° 82°
Cool
(Mon-Fri)Start time Heat (Mon-Fri)Period Heat (Sat-Sun)
Cool
(Sat-Sun)
Residential Use
Occupied 1 8:00 am 70° 75° On
Unoccupied 1 10:00 pm 55° 85° Auto
Occupied 2* 12:00 am 70° 75° On
Unoccupied 2* 12:00 am 55° 85° Auto
CoolStart time HeatPeriod Fan
Commercial Use
* Period 2 is cancelled by default. If you activate it, the values shown above are default settings.

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MENU
MCR32965
MCR32966
Create/Edit Schedule
Guide me through
scheduling
MCR32967
To adjust program schedules
Press MENU, then CREATE/EDIT
SCHEDULE to display options:
• Guide me: This option creates a
schedule for you, by asking simple
questions.
• I’ll do it myself: This is a faster way
to create a schedule manually.
• View/Edit: This displays the full
schedule, so you can make quick
adjustments.
Press CREATE/EDIT SCHEDULE
Press any displayed option
Press HELP at any menu screen for more
information about schedule options.
To reduce costs, you should use the pre-set
Energy Saver settings (see page 7).
Press MENU