Honeywell THX9421 Thermostat User Manual

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Operating

Manual

Prestige THX9321/9421

Touch-screen Thermostat

9-2493EFS-01

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.

Prestige THX9321/THX9421 Thermostat

Table of contents

Programming & Operation

Preferences menu.............................21

Temporary schedule changes..........22

Screen cleaning................................23

Security settings...............................24

Installer contact information............25

Advanced features ...........................26

Quick reference ..................................2

Date/time settings ..............................4

Fan settings ........................................5

System settings..................................6

Energy Saver settings ........................7

Using program schedules..................8

Schedule overrides.............................9

Appendices

Installer options................................27

Battery replacement.........................28

Humidity display...............................30

Optional accessories........................31

In case of difficulty...........................34

Limited warranty...............................35

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.

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Operating Manual

Quick reference: residential use

Display

home screen

Control fan operation

(see page 5)

Select system

type (see page 6)

Display menu

options (see

pages 11-26)

Change date or

time (see page 4)

Outdoor temperature

and humidity

Adjust

temperature

settings (see

pages 9-10)

Current system

status

Current program status

Indoor temperature and humidity

Outdoor temperature and humidity are displayed

only if an optional outdoor air sensor is installed.

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Prestige THX9321/THX9421 Thermostat

Quick reference: commercial use

Display

home screen

Control fan operation

(see page 5)

Select system

type (see page 6)

Display menu

options (see

pages 11-26)

Change date or

time (see page 4)

Outdoor temperature

and humidity

Adjust

temperature

settings (see

pages 9-10)

Current system

status

Indoor

temperature

and humidity

Press to override program temporarily

Thermostat location and

current program status

Outdoor temperature and humidity are displayed

only if an optional outdoor air sensor is installed.

9-2493EFS—01

Operating Manual

Date/time settings

Press date/time display

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).

Press to select date or time

The thermostat will switch to and from Daylight

Saving Time automatically.

Press arrow buttons to change

MCR32960

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Prestige THX9321/THX9421 Thermostat

Fan settings

Press FAN

•ꢀ On: Fan is always on.

FAN

•ꢀ Automatic: Fan runs only when

MCR32961

heating or cooling system is on.

•

ꢀ Circulate: Fan runs randomly,

about 35% of the time (residential

models only).

Press any displayed option

ꢀ Follow Schedule: Fan controlled

by program (see pages 7-8).

Automatic

fan idle

In commercial use, press AUTOMATIC or ON

to temporarily override the programmed fan

schedule.

MCR32962

In commercial use, the CIRCULATE option is

not available.

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Operating Manual

System settings

Press SYSTEM

Press SYSTEM, then select any option

press s or t to scroll menu):

(

SYSTEM

•

ꢀ Heat: Thermostat controls only the

heating system.

MCR32963

Press any displayed option

ꢀ 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.

Automatic

MCR32964

•ꢀ 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.

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Prestige THX9321/THX9421 Thermostat

Energy Saver settings for maximum cost savings

These default Energy Saver settings can reduce expenses by as much as 33%.

(

See next page to customize each time period.)

Heat

Cool

Heat

(Sat-Sun)

Cool

(Sat-Sun)

Period

Start time

(Mon-Fri) (Mon-Fri)

Wake

6:00 am

8:00 am

6:00 pm

10:00 pm

70°

62°

70°

62°

78°

85°

78°

82°

70°

62°

70°

62°

78°

85°

78°

82°

Leave

Return

Sleep

Period

Start time

Heat

Cool

Fan

Occupied 1

8:00 am

70°

55°

70°

55°

75°

85°

75°

85°

Auto

Unoccupied 1

Occupied 2*

Unoccupied 2*

10:00 pm

12:00 am

Auto

Period 2 is cancelled by default. If you activate it, the values shown above are default settings.

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Operating Manual

To adjust program schedules

Press MENU

Press MENU, then CREATE/EDIT

SCHEDULE to display options:

MCR32965

•ꢀ Guide me: This option creates a

schedule for you, by asking simple

questions.

Press CREATE/EDIT SCHEDULE

Create/Edit Schedule

•

ꢀ I’ll do it myself: This is a faster

way to create a schedule manually.

MCR32966

Press any displayed option

•

ꢀ View/Edit: This displays the full

schedule, so you can make quick

adjustments.

Guide me through

scheduling

To reduce costs, you should use the pre-set

Energy Saver settings (see page 7).

Press HELP at any menu screen for more

information about schedule options.

MCR32967

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Prestige THX9321/THX9421 Thermostat

Program schedule override: residential use

Press to change temperature

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.

Cancel

Done

Hold

MCR32968

Press to set

hold” time

Press to

cancel

Press to

begin “hold”

“

“hold”

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Operating Manual

Program schedule override: commercial use

Press to activate “occupied” mode

Press s or t to change the

temperature. It will be maintained until

the “hold” time you set.

OVERRIDE

Press OVERRIDE to use a pre-set

MCR32969

“

occupied” temperature if a person is

Press to change temperature

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.

Cancel

Done

Hold

MCR32970

Press to set

hold” time

Press to

cancel

Press to

begin “hold”

“

“hold”

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Prestige THX9321/THX9421 Thermostat

System status information

Press MENU

Press MENU, then select EQUIPMENT

STATUS.

MCR32965

Depending on how your thermostat

was installed, the Equipment Status

screen can report data about the fol-

lowing systems:

Scroll to select EQUIPMENT STATUS

Equipment Status

•

ꢀ Heating and cooling

ꢀ Fan

MCR32971

ꢀ Humidification

ꢀ Dehumidification

ꢀ Ventilation

ꢀ Maintenance reminders

ꢀ Thermostat information

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Operating Manual

Menu: Vacation scheduling (residential use)

Press MENU

This feature lets you conserve energy

while away, and restores a comfortable

temperature just before you return to

your home.

MCR32965

Scroll to select VACATION

Press s or t at each screen to enter

temperatures, dates and times as

prompted, then press DONE.

Vacation Mode

MCR32972

The temperature you set will be

maintained until you return, then the

program schedule will resume.

Follow screen prompts, then press DONE

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Prestige THX9321/THX9421 Thermostat

Menu: Holiday/event scheduling (commercial use)

Press MENU

This feature lets you conserve energy

when the workplace is unoccupied for

special events or on holidays.

MCR32965

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.

Scroll to select HOLIDAY / EVENT SCHEDULER

Holiday / Event Scheduler

MCR32973

Choose an option below

The CUSTOM EVENTS button gives

you more options to customize

temperatures for specific dates and

times in the future.

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Operating Manual

Menu: Holiday override (commercial use)

Scroll to select HOLIDAY MODE

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.

Holiday Mode

MCR32974

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.

Follow screen prompts, then press DONE

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Prestige THX9321/THX9421 Thermostat

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.

Press to start

occupancy

MCR32975

Press to maintain comfortable

temperature while room is occupied

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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Operating Manual

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.

9-2493EFS—01

Prestige THX9321/THX9421 Thermostat

Menu: Humidification

Press MENU

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.

MCR32965

Scroll to select HUMIDIFICATION

Humidification

MCR32976

Set humidity to desired level

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.

Window protection: Thermostat adjusts humidity as

needed to prevent frost or condensation

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Operating Manual

Menu: Dehumidification (residential use)

Press MENU

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.

MCR32965

Scroll to select DEHUMIDIFICATION

Press MORE SETTINGS to review or

change settings for the dehumidifier

filter timer.