Honeywell PRESTIGE THX9321 User manual

Operating
Manual
69-2493EFS-01
Prestige®THX9321/9421
Touch-screen Thermostat

Read and save these instructions.
® U.S. Registered Trademark.
Copyright © 2011 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)

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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
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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)
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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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—01
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—01
These default Energy Saver settings can reduce expenses by as much as 33%.
(See next page to customize 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

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Cancel
Hold Done
MCR32968
Program schedule override: residential use
Press s or t to change the tempera-
ture. It will be maintained until the
“hold” time you set.
Press the PERMANENT HOLD button to
keep the same temperature until you
manually change it or resume the
program schedule.
To cancel these settings at any time,
press CANCEL HOLD.
Press to change temperature
Press to set
“hold” time
Press to
cancel
“hold”
Press to
begin “hold”

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Cancel
Hold Done
MCR32970
MCR32969
OVERRIDE
Program schedule override: commercial use
Press s or t to change the
temperature. It will be maintained until
the “hold” time you set.
Press OVERRIDE to use a pre-set
“occupied” temperature if a person is
present during an unoccupied period.
The new temperature will be main-
tained for at least 1 hour, and can be
adjusted up to the maximum time set
by the installer. To change the time,
press the HOLD UNTIL arrow buttons.
The programmed schedule will resume
when the override timer expires. To
cancel the override at any time, press
CANCEL HOLD.
Press to change temperature
Press to set
“hold” time
Press to
cancel
“hold”
Press to
begin “hold”
Press to activate “occupied” mode

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Equipment Status
MCR32971
MENU
MCR32965
System status information
Press MENU, then select EQUIPMENT
STATUS.
Depending on how your thermostat
was installed, the Equipment Status
screen can report data about the fol-
lowing systems:
• Heating and cooling
• Fan
• Humidification
• Dehumidification
• Ventilation
• Maintenance reminders
• Thermostat information
Scroll to select EQUIPMENT STATUS
Press MENU

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MCR32972
Vacation Mode
MENU
MCR32965
Menu: Vacation scheduling (residential use)
This feature lets you conserve energy
while away, and restores a comfortable
temperature just before you return to
your home.
Press s or t at each screen to enter
temperatures, dates and times as
prompted, then press DONE.
The temperature you set will be
maintained until you return, then the
program schedule will resume.
Scroll to select VACATION
Follow screen prompts, then press DONE
Press MENU

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MCR32973
Holiday / Event Scheduler
MENU
MCR32965
Menu: Holiday/event scheduling (commercial use)
This feature lets you conserve energy
when the workplace is unoccupied for
special events or on holidays.
The US (United States) and CANADIAN
options allow you to select from a list
of holidays commonly observed in
each country. You can set the system
to “unoccupied” or “occupied” mode
for the days you select.
The CUSTOM EVENTS button gives
you more options to customize
temperatures for specific dates and
times in the future.
Scroll to select HOLIDAY / EVENT SCHEDULER
Choose an option below
Press MENU

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Holiday Mode
MCR32974
Menu: Holiday override (commercial use)
Press HOLIDAY MODE to set
temperatures that will be maintained
from now until the date you expect to
return.
The thermostat will resume the normal
schedule on the date you set. You can
press CANCEL at any time to resume
the normal schedule.
Follow screen prompts, then press DONE
Scroll to select HOLIDAY MODE
The cool temperature setting can only be set
higher than the unoccupied program setting and
the heat temperature setting can only be set
lower than the unoccupied program setting.

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Press to start
occupancy
MCR32975
Initiate Occupancy mode (commercial use)
This feature keeps temperature at an
energy-saving level until the PRESS TO
START OCCUPANCY button is pressed.
When you arrive, press the button to
maintain a comfortable temperature
while the room is occupied.
Press the s or t buttons to set the
temperature or “Hold Until” time. The
temperature is maintained until the
time you set. Temperature returns to
an energy-saving level after the timer
expires, or the “Occupied” period ends.
The thermostat keeps temperature at
an energy saving level until OVERRIDE
or PRESS TO START OCCUPANCY button is
pressed.
Press to maintain comfortable
temperature while room is occupied
This feature is available only if it is programmed
by the installer.

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Remote setback (commercial use)
Programmable
During “occupied” periods: If a remote setback switch or sensor is installed,
temperature will be maintained at the level set for the Standby mode when the
switch or sensor is off. When it is on, temperature will be maintained at the level
set for the occupied period.
During “unoccupied” periods: The remote setback switch or sensor is ignored
during unoccupied periods. Temperature will be maintained at the level set for the
unoccupied period.
Non-programmable
If a remote setback switch or sensor is installed, temperature will be maintained
at the level set for the Standby mode when the switch or sensor is off. When it is
on, temperature will be maintained at the level you set manually.
Time delay
Depending on how your thermostat was installed, there may be a time delay of
up to 30 minutes before the system switches from occupied to standby mode.

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MCR32976
Humidification
Menu: Humidification
Move the slider bar to the humidity
level you prefer, then press DONE.
Press MORE SETTINGS if frost or con-
densation appears on windows. A
lower number adjusts humidity to help
prevent these problems. Use a higher
number if indoor air is too dry.
Scroll to select HUMIDIFICATION
Set humidity to desired level
Window protection: Thermostat adjusts humidity as
needed to prevent frost or condensation
The Window Protection option is only available
if an optional outdoor sensor is installed.
The thermostat controls humidification and
dehumidification systems as needed to
maintain the desired humidity level. A 15%
separation between settings is maintained to
prevent excessive energy use.
MENU
MCR32965
Press MENU

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More
Settings
MCR32978
MCR32977
Dehumidification
Menu: Dehumidification (residential use)
This feature can control a dehumidifier
or use your air conditioner to reduce
humidity. Move the slider bar to the
humidity level you prefer, then press
DONE.
Press MORE SETTINGS to review or
change settings for the dehumidifier
filter timer.
Scroll to select DEHUMIDIFICATION
Set humidity to desired level
Press to review filter timer
If your air conditioner is used to control humidity,
temperature may drop as much as 3° F below
the level you set until humidity reaches the
desired level.
The thermostat controls humidification and
dehumidification systems as needed to maintain
the desired humidity level. A 15% separation
between settings is maintained to prevent
excessive energy use.
MENU
MCR32965
Press MENU