Pentax THX9421, THX9321, YTHX9321, YTHX9421 Operating Manual
Prestige® THX9321/9421
69-2493EFS-05
Touch-screen Thermostat
Operating
Manual
About your new thermostat
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
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)
Read and save these instructions.
® U.S. Registered Trademark.
Copyright © 2013 Honeywell International Inc.
All rights reserved.
Table of contents
Prestige® THX 9321/TH X9421 The rm ostat
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
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.
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
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Quick reference: residential use
Display
home screen
Change date or
time (see page 4)
Outdoor
temperature
and humidity
Current system
status
Outdoor temperature and humidity are displayed
only if an optional outdoor air sensor is installed.
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Control fan operation
(see page 5)
Current program status
Select system
type (see page 6)
Display menu
options (see
pages 11-26)
Adjust
temperature
settings (see
pages 9-10)
Indoor temperature and
humidity
Quick reference: commercial use
Prestige® THX 9321/TH X9421 The rm ostat
Display
home screen
Change date or
time (see page 4)
Outdoor
temperature
and humidity
Current system
status
Press to override program
temporarily
Outdoor temperature and humidity are displayed
only if an optional outdoor air sensor is installed.
Control fan operation
(see page 5)
Select system
type (see page 6)
Thermostat location and
current program status
3
Display menu
options (see
pages 11-26)
Adjust
temperature
settings (see
pages 9-10)
Indoor
temperature
and humidity
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Date/time settings
Press date/time display
Press to select date or time
Press arrow buttons to change
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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.
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Fan settings
Press
FAN
FAN
Press any displayed option
Automatic
fan idle
In commercial use, the CIRCULATE option is
not available.
Prestige® THX 9321/TH X9421 The rm ostat
• 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).
In commercial use, press AUTOMATIC or ON
to temporarily override the programmed fan
schedule.
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System settings
Press SYSTEM
SYSTEM
Press any displayed option
Automatic
Press HELP for more information about
these options.
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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.
Prestige® THX 9321/TH X9421 The rm ostat
Energy Saver settings for maximum cost savings
These default Energy Saver settings can reduce expenses. (See next page to customize each time period.)
Heat
(Mon-Fri)Period
(Mon-Fri)Start time
Cool
Heat
(Sat-Sun)
Cool
(Sat-Sun)
Wake
Leave
Return
Sleep
Residential Use
Occupied 1
Unoccupied 1
Occupied 2*
Unoccupied 2*
Commercial Use
* Period 2 is cancelled by default. If you activate it, the values shown above are default settings.
6:00 am
8:00 am
6:00 pm
10:00 pm
8:00 am
10:00 pm
12:00 am
12:00 am
70° 78° 70° 78°
62° 85° 62° 85°
70° 78° 70° 78°
62° 82° 62° 82°
Cool Start time Heat Period Fan
70° 75° On
55° 85° Auto
70° 75° On
55° 85° Auto
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To adjust program schedules
Press MENU
MENU
Press CREATE/EDIT SCHEDULE
Create/Edit Schedule
Press any displayed option
Guide me through
scheduling
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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.
To reduce costs, you should use the pre-set
Energy Saver settings (see page 7).
HELP at any menu screen for more
Press
information about schedule options.
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Program schedule override: residential use
Press to change temperature
Cancel
Hold
Press to set
“hold” time
Press to
cancel
“hold”
Done
Press to
begin “hold”
Press s or t to change the temperature. 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.
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Program schedule override: commercial use
Press to activate “occupied” mode
OVERRIDE
Press to change
temperature
Cancel
Press to set
“hold” time
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Press to
cancel
“hold”
Hold
Done
Press to
begin “hold”
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 maintained
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.
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System status information
Prestige® THX 9321/TH X9421 The rm ostat
Press MENU
Scroll to select EQUIPMENT STATUS
Equipment Status
MENU
Press MENU, then select EQUIPMENT
STATUS.
Depending on how your thermostat was
installed, the Equipment Status screen
can report data about the following systems:
• Heating and cooling
• Fan
• Humidification
• Dehumidification
• Ventilation
• Maintenance reminders
• Thermostat information
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Menu: Vacation scheduling (residential use)
Press MENU
MENU
Scroll to select VACATION
Vacation Mode
Follow screen prompts, then press DONE
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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.
Prestige® THX 9321/TH X9421 The rm ostat
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Menu: Holiday/event scheduling (commercial use)
Press MENU
Scroll to select HOLIDAY / EVENT SCHEDULER
Holiday / Event Scheduler
Choose an option below
MENU
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.
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Menu: Holiday override (commercial use)
Scroll to select HOLIDAY MODE
Holiday Mode
Follow screen prompts, then press DONE
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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.
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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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 to start
occupancy
Press to maintain comfortable
temperature while 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.
This feature is available only if it is
programmed by the installer.
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Remote setback (commercial use)
During occupied periods, an occupancy sensor tells the thermostat to go to
STANDBY (setback settings) when no one is in the room. If someone is in the room,
then it follows the settings of the occupied period. The occupancy sensor is ignored
during unoccupied periods.
If the thermostat is setup for non-programmable, the sensor tells the thermostat to go
to STANDBY settings when no one is in the room. If someone is in the room, then it
follows the settings set by the user.
Depending on how your thermostat was installed, there may be a time delay of up
to 30 minutes before it switches from occupied settings to the standby settings. This
allows the room to stay comfortable if the room is unoccupied for a short period of
time.
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Menu: Humidification
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Prestige® THX 9321/TH X9421 The rm ostat
Press MENU
MENU
Scroll to select HUMIDIFICATION
Humidification
Set humidity to desired level
Window Protection limits the amount of humidity
to prevent frost or condensation on windows
Move the slider bar to the humidity level
you prefer, then press DONE.
Press MORE SETTINGS if frost or condensation appears on windows. A lower
number adjusts humidity to help prevent
these problems. Use a higher number if
indoor air is too dry.
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.
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Menu: Dehumidification (residential use)
Press MENU
MENU
Scroll to select DEHUMIDIFICATION
Dehumidification
Set humidity to desired level
Press to review filter timer
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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.
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.
Prestige® THX 9321/TH X9421 The rm ostat
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Menu: Dehumidification (commercial use)
Press MENU
Scroll to select DEHUMIDIFICATION
Dehumidification
Set humidity to desired level
Press to review filter timer
MENU
Move the slider bar to the humidity level
you prefer, then press DONE. If your air
conditioner is used to control humidity, the thermostat may use the following methods to maintain your desired
humidity:
• Cool from 1° to 5° F lower than your
temperature setting.
• Run cooling for the minimum “on”
time to reduce humidity.
• Run cooling and heating at the same
time to reduce humidity without
lowering the temperature.
Press MORE SETTINGS to review or
change settings for the dehumidifier
filter timer.
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Menu: Ventilation
Press MENU
MENU
Scroll to select VENTILATION
Ventilation
Set operating mode Set temporary run time
More
Settings
Press to set outdoor lockouts
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Press SETTING to set operating mode:
Auto: Ventilation runs as programmed
by the installer.
Off: Ventilation remains off unless
turned on using the timer.
On: Ventilation is always on.
Press s or t to run ventilation
temporarily. To turn it off, set to zero.
Press MORE SETTINGS to change maintenance reminders, or set outdoor lockouts (if set to Yes, ventilation will not run
when outdoor conditions exceed values
set by the installer).
If set up for humidification in heat mode,
the ventilator will turn on to remove excess
humidity if 10% or more above your humidity
setting.
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Menu: Preferences
Prestige® THX 9321/TH X9421 The rm ostat
Press MENU
Scroll to select PREFERENCES
Preferences
Scroll to select desired option
Press HELP for more information about
these options.
MENU
At this screen you can view or change
the following options:
• Reminders to change filters
• Display heat/cool diagnostic alerts
• Utility Schedule options
• Fahrenheit/Celsius display
• 12/24-hour clock display
• Screen color and brightness
• Language choice
• Scheduling options
• Adaptive Intelligent Recovery
• Restore default schedule
• Daylight Saving Time options
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Menu: Temporary schedule changes
Press MENU
MENU
Scroll to select TEMPORARY SCHEDULE CHANGES
Te mporary Schedule Changes
Select option, then follow screen prompts
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This feature is useful if your daily schedule sometimes changes.
Select an option, then follow screen
prompts to conserve energy while
you’re away and maintain a comfortable
climate after you return.
After the times you set, the normal program schedule will resume.
Press
HELP for more information about
these options.
See also Program Schedule
Overrides (pages 9-10).
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Menu: Clean screen
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Prestige® THX 9321/TH X9421 The rm ostat
Press MENU
Scroll to select CLEAN SCREEN
Clean Screen
Press YES to lock screen for cleaning
MENU
Use this feature to lock the screen so
you can clean it without changing any
settings. A countdown timer will show
elapsed time until the screen is
reactivated.
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.
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Menu: Security settings
Press MENU
MENU
Scroll to select SECURITY SETTINGS
Security Settings
Select option, then follow screen prompts
Press HELP for more information about
these options.
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Security options can be used to prevent
unauthorized changes to system
settings.
Lock options:
• Unlocked: Full access allowed.
• Partially locked: Only temperature
can be changed.
• Fully locked: No access allowed.
If you choose to use a password for
additional security, write it here for reference:
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Menu: Dealer Information
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Prestige® THX 9321/TH X9421 The rm ostat
Press MENU
Scroll to select DEALER INFORMATION
Dealer Information
MENU
Check this screen if you need to
contact the person who installed your
system, for maintenance, repairs or
upgrades.
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Advanced features
Adaptive Intelligent Recovery (residential use only)
Over time, the Prestige® thermostat “learns” how long it takes your system to provide
the temperature you want. It turns on the heating or cooling system earlier to make
sure you’re comfortable at the time you expect.
Dehumidification Away Mode
Your system can be set to control indoor climate while your home is vacant
during the humid season. Before you leave, press MENU, then select
DEHUMIDIFICATION AWAY MODE. Temperature and humidity will be kept at levels adequate to protect your home and possessions while you are away. When you return,
press CANCEL to resume normal operation.
Compressor Protection
This feature protects your air-conditioning system by forcing the compressor to pause
before restarting, to prevent damage. During this brief pause, the message “Waiting
for Equipment” is displayed on screen.
Pre-occupancy Purge (commercial use only)
This feature turns on the fan 1 to 3 hours before each “occupied” time period, to pro-
vide a comfortable work environment when you arrive.
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Menu: Installer options
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Installer Options
MENU
Prestige® THX 9321/TH X9421 The rm ostat
These options should be changed
only by professionally qualified technicians. To avoid disabling or damaging
your equipment, do not change these
options yourself.
The USB port on the bottom of the thermostat is for use by professional installers only. Do not attempt to use this port
yourself.
Press HELP at any screen for more
information about these options.
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Battery replacement: Wireless outdoor sensor
Replace batteries
in your
outdoor sensor
Remove sensor from bracket, detach cover and install 2 fresh AA lithium batteries
Replace batteries in your outdoor sensor when a warning appears on the
thermostat screen, about two months before batteries are depleted.
After new batteries are installed, the outdoor sensor will restore communication with
the wireless network within a few seconds.
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