TCONT900AC43UACommunicating,
Programmable Comfort Control
OWNER’S GUIDE
Pub No. 22-5211-02
69-1817-04
FEATURES
•
•
•
Large, Clear Display with Backlighting – current temperature, set temperature and time are
easy-to-read and all are displayed on the home screen.
Menu Driven Programming – Guides you through the scheduling process, showing only
necessary information and choices on each screen.
Ability to Select Multiple Days – allows you to easily customize the Comfort Control for your
unique schedule.
•
•
•
•
•
•
Real-Time Clock – keeps time during power failure; automatically updates for daylight savings.
Precise Temperature Control (+/- 1°F) (+/- .5°C) – reliable, consistent comfort.
Multiple HOLD options – allows you to modify schedule indefinitely or for a specific time.
Change Reminders – reminds you to service or replace the air filters and/or humidifier pad.
Programmable Fan – increases air quality when combined with a whole-house air cleaner.
Outdoor Temperature Indication – shows current outdoor temperature on the display to help
you plan outdoor activities.
NOTE: The home screen may differ slightly, depending on the heating and/or cooling system you
have and the Comfort Control settings for your system type.
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HOME SCREEN
Key Description
TUE
FAN
SELECTS ON/AUTO/CIRC
UP ARROW
RAISES TEMPERATURE SETTING
FAN
Inside
Set To
AUTO
SYSTEM
SELECTS EM. HEAT/HEAT/OFF/COOL/AUTO
DOWN ARROW
LOWERS TEMPERATURE SETTING
Following
Schedule
SYSTEM
HEAT
AM
MORE (SELECT MODELS)
SHOWS ADDITIONAL SYSTEM
INFORMATION
SCHED
HOLD
CLOCK SCREEN MORE
SCHED
ENTERS SCHEDULING MODE
SCREEN
LOCKS OUT THE SCREEN TO ALLOW FOR CLEANING
CLOCK
SETS THE TIME FORWARD OR BACK
HOLD
SETS A PERMANENT HOLD AND
ACTIVATES VACATION HOLD
M19952
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HOME SCREEN
Display Description
INSIDE TEMPERATURE
SHOWS THE CURRENT INSIDE TEMPERATURE
TUE
SHOWS CURRENT DAY OF THE WEEK
SET TO TEMPERATURE
SHOWS THE CURRENT
SET TEMPERATURE
TUE
FAN
SHOWS FAN SETTING
FAN
Inside
Set To
AUTO
SYSTEM
SHOWS CURRENT SYSTEM POSITION
Following
Schedule
SYSTEM
FOLLOWING SCHEDULE
HEAT
SHOWS THE THERMOSTAT IS
FOLLOWING THE PROGRAMMED
SCHEDULE
AM
TIME
DISPLAY CURRENT TIME OF DAY,
HOLD TIME REMAINING OR NUMBER
OF VACATION DAYS REMAINING
SCHED
HOLD
CLOCK SCREEN MORE
M19953
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PROGRAMMING YOUR HEATING AND COOLING SCHEDULE
Your Comfort Control can control up to four different schedule periods per day:
Wake – Period when you awaken and want your home at a comfortable temperature.
Leave – Period when you are away from home and want an energy-saving temperature.
Return – Period when you return home and want your home back to a comfortable temperature.
Sleep – Period when you are asleep and want an energy-saving temperature.
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NOTE: Schedule times are in 15-minute intervals.
Preprogrammed Energy Star Settings
additional education and resources on programmable Comfort Controls.
Table 1. Energy Star Default Program Settings.
Schedule Period
Time
Setpoints
Fan Setting
Heat
Cool
Wake
Leave
Return
Sleep
6:00 AM
8:00 AM
6:00 PM
10:00 PM
70°F (21°C)
62°F (16.5°C)
70°F (21°C)
62°F (16.5°C)
78°F (25.5°C)
85°F (29.5°C)
78°F (25.5°C)
82°F (27.8°C)
Auto
Auto
Auto
Auto
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FRI
EDITING SCHEDULE
FAN
Inside
Set
1. Press Sched key.
AUTO
Following
Schedule
SYSTEM
HEAT
AM
PM
SCHED
HOLD
CLOCK SCREEN
M22445
2. Press Edit key.
MON
TUE
WED
THU
FRI
SA
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
FAN
Inside
Set
HEAT
AUTO
Following
Schedule
CANCEL
PERIOD
SYSTEM
EM HEAT
HEAT
OFF
COOL
AM
PM
COOL
AUTO
SCHED
EDIT
HOLD
WAKE
CLOCK SCREEN
LEAVE RETURN SLEEP CANCEL
M22553
DONE
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3. It is OK to pick multiple days. Select any combination of days to edit. These days are sched-
uled with the same times and temperatures. Check marks appear next to days selected.
MON
TUE
WED
THU
FRI
SAT
SUN
OK TO PICK MULTIPLE DAYS
FAN
ON
HEAT
AUTO
CIRC
CANCEL
PERIOD
AM
COOL
DONE
WAKE
LEAVE RETURN SLEEP CANCEL
M19955
4. Press Wake key. Once pressed, Wake flashes to show it is selected.
5. Press Up and Down keys to modify time and heat and cool temperatures from this screen.
NOTE: The Fan setting can be programmed for On, Auto, or Circ for each period selected. See
“Fan Schedule” on page 19 for more information.
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6. Press Leave key and repeat step 5.
7. Press Return key and repeat step 5.
8. Press Sleep key and repeat step 5.
9. When complete, press Done key. “Saving Changes” appears on the screen to indicate
changes are being saved to the day(s) modified.
MON
TUE
WED
THU
FRI
SAVING
CHANGES
M19956
NOTE: To set a Program Schedule for the remaining days of the week, repeat steps 1-9.
Example: If Mon - Fri was selected first, go back and repeat steps 1-9 for Sat and Sun.
10. To exit schedule without saving changes, press Cancel key any time.
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CANCELING A SCHEDULE PERIOD
NOTE: You may want to cancel a period to match your lifestyle; for example, if someone is always
home during the day on Tuesday, you can cancel the Leave and Return periods (the Com-
fort Control would then control to the Wake temperature until the Sleep period).
1. Press Sched key.
2. Press Edit key.
3. Select the Day(s) of the week desired.
4. Press schedule period you want to cancel (Wake, Leave, Return or Sleep). Once selected, the
period flashes.
5. Press Cancel Period key.
MON
TUE
WED
THU
FRI
SAT
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
FAN
Inside
Set To
HEAT
AUTO
Following
Schedule
CANCEL
PERIOD
SYSTEM
EM HEAT
HEAT
OFF
AM
PM
COOL
COOL
AUTO
SCHED
HOLD
WAKE
CLOCK SCREEN
LEAVE RETURN SLEEP CANCEL
DONE
M22446
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NOTE: Note that the time, temperature(s) and fan setting disappear. The bar above the selected
period is removed, indicating the scheduled period was cancelled. To reinstate a schedule
period, press arrow keys to set desired time and temperatures.
6. Press Done key.
MON
TUE
WED
THU
FRI
SAT
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
FAN
Inside
Set To
HEAT
AUTO
Following
Schedule
CANCEL
PERIOD
SYSTEM
EM HEAT
HEAT
OFF
AM
PM
COOL
COOL
AUTO
SCHED
HOLD
WAKE
CLOCK SCREEN
LEAVE RETURN SLEEP CANCEL
DONE
M22446
NOTE: When changing from non-programmable to programmable mode, the screen displays “Per-
manent Hold” under the time icon. This goes away when the schedule key is hit or the
schedule menu is entered.
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SETTING TIME
1. Press Clock.
2. Use arrows to set current time.
TUE
AM
PM
SCHED
HOLD
CLOCK SCREEN
DONE
M19958
3. Press Done key.
IMPORTANT
The current day of the week should already be set correctly. If not, see “Advanced Settings”
on page 34 to set the day.
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OPERATING YOUR COMFORT CONTROL
Setting Fan and System Keys
SETTING FAN KEY
The Fan key selections vary based on your heating and/or cooling system type.
On – Fan runs continuously. Use this setting for improved air circulation or for more efficient central
air cleaning. The Trane Proprietary Humidity Control might disable continuous fan function. See
“Trane Proprietary Humidity Control” on page 28 for additional information.
Auto – Fan follows fan program schedule. See “Fan Schedule” on page 19 for more information.
Circ – Circulation control will provide a variable circulation determined by the Adaptive Intelligent
Circulation (AIC) algorithm running the fan between 20% and 60% of the time.
SETTING SYSTEM KEY
The System key selections vary based on your heating and/or cooling system type.
Heat – Controls your heating system.
Off – Both heating and cooling systems are off.
Cool – Controls your cooling system.
Auto (when enabled) – Controls both your heating and cooling system based on temperature.
Em. Heat – Compressor is locked out and auxiliary heat cycles to maintain temperature. (Used only
for heat pump systems with backup heat)
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Setting Temperature Overrides
Your Comfort Control has three temperature override options: Hold Temperature Until, Permanent
Hold and Vacation Hold.
HOLD TEMPERATURE UNTIL (TEMPORARY HOLD)
Holds temperature temporarily until the next scheduled period time or until the time the user sets.
1. Press Up or Down arrow next to the temperature you want to adjust. “Hold Temperature Until”
time appears on the screen. The Hold Temperature Until time defaults to the start time of the
next scheduled period.
NOTE: The Time Up and Down arrows are shown for approximately seven seconds. Pressing on
the screen time (where the Hold Temperature Until time is shown) allows the arrows to
reappear.
2. Press Up or Down arrow next to the Time key to set desired time for the Comfort Control to
resume schedule.
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3. Press the Cancel or Sched key to cancel “Hold Tem-
TUE
perature Until” and resume schedule.
FAN
Inside
Set
NOTE: Once “Hold Temperature Until” time is reached, the
comfort control shows “Following Schedule” on the
screen to indicate that “Temporary Hold” has ended.
AUTO
SYSTEM
Hold Temperature
Until
HEAT
PERMANENT HOLD
Permanent Hold changes the temperature setting until
Permanent Hold is cancelled.
PM
SCHED
HOLD
CLOCK SCREEN
CANCEL
M19959
1. Press Hold key. “Permanent Hold” appears on the
screen.
2. Press Up or Down arrow next to the temperature you
want to set during “Hold”.
3. Press Cancel key to cancel “Permanent Hold” and
resume the schedule.
TUE
FAN
Inside
Set To
AUTO
SYSTEM
NOTE: In ISU 0160, when changing from nonprogrammable
to programmable mode, the screen displays “Per-
manent Hold” under the time icon. This goes away
when the schedule key is hit or the schedule menu
is entered.
HEAT
AM
Permanent
Hold
SCHED HOLD
CLOCK SCREEN
CANCEL
M19960
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VACATION HOLD
Changes temperature setting for a selected number of days, from 1 to 365 days.
1. Press the Up and Down arrow keys to set the desired temperature while away on vacation.
Notice that “Hold Temperature Until” time is shown on the screen. (This is the time the
Vacation Hold override expires after the number of days ends.)
2. Press Hold key twice. Screen shows “Hold Temperature Until” one day.
3. Press Up and Down arrow keys to change the number of Days you desire Comfort Control to
override the schedule.
NOTE: Days Up and Down arrows appear for approximately seven seconds. Pressing just below
Hold Temperature Until on the screen allows the Days Up and Down arrows to reappear.
NOTE: When the number of days of Vacation Hold expires, the screen shows “Following
Schedule” to indicate that Vacation Hold has ended.
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4. To cancel the Vacation Hold override early, press the Cancel key.
THU
FAN
Inside
Set To
AUTO
SYSTEM
Hold Temperature
Until
HEAT
DAYS
SCHED
CLOCK SCREEN
CANCEL
M19961
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Fan Schedule
Press Fan key while in the Scheduling Screen to program the System Fan. Choices available from
the Scheduling Screen:
On – Fan runs continuously. Use this setting for improved air circulation or for more efficient central
air cleaning.
Auto – (default position) Fan runs with equipment. Programmable for all schedule periods (Wake,
Leave, Return and Sleep).
Circ – Circulation control will provide a variable circulation determined by the Adaptive Intelligent
Circulation (AIC) algorithm running the fan between 20% and 60% of the time.
MON
TUE
WED
THU
FRI
SAT
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
FAN
Inside
Set To
HEAT
AUTO
Following
Schedule
CANCEL
PERIOD
SYSTEM
EM HEAT
HEAT
OFF
AM
PM
COOL
COOL
AUTO
SCHED
HOLD
WAKE
CLOCK SCREEN
LEAVE RETURN SLEEP CANCEL
DONE
M22447
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Fan Status Displayed on Home Screen
If the Fan program is scheduled, Auto is shown and any programmable mode that is set; for
example, if during Wake period, Fan is set to Auto, only Auto is shown in the Fan area. However, if
during the Wake period, fan is scheduled to On, both Auto and On are shown. Auto indicates fan is
running its schedule; On indicates Fan schedule is set to On.
THU
FAN
ON
Inside
Set
AUTO
Following
Schedule
SYSTEM
HEAT
AM
SCHED
HOLD
CLOCK SCREEN
M19962
Manual Override of Fan Schedule
On – Fan runs continuously. Use this setting for improved air circulation or for more efficient
central air cleaning. The Trane Proprietary Humidity Control might disable continuous fan function.
See “Trane Proprietary Humidity Control” on page 28 for additional information.
Auto – (default position) Fan follows fan program schedule. See “Fan Schedule” on page 19 for
more information.
Circ – Circulation control will provide a variable circulation determined by the Adaptive
Intelligent Circulation (AIC) algorithm running the fan between 20% and 60% of the time.
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CLEANING YOUR COMFORT CONTROL SCREEN
The Comfort Control has a touch screen interaction. Follow these steps to clean the screen without
making comfort control changes:
1. Press Screen key. Comfort Control locks out touch keys for 30 seconds to allow for cleaning.
2. Use damp cloth slightly moistened with
water and mild dishwasher detergent to
clean thescreen.
3. Repeat the above steps, as necessary.
OK TO
CLEAN
M19964
IMPORTANT
Do NOT spray any type of liquid directly on the Comfort Control itself.
4. Press the Done key to return to the Home Screen and normal operation.
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READING YOUR OUTDOOR TEMPERATURE
If the communicating Comfort Control has discovered an outdoor temperature sensor, the comfort
control displays the outdoor temperature.
VIEW OUTSIDE TEMPERATURE
The outside temperature is located in the lower right corner of the Home Screen.
NOTE: If the communicating Comfort Control is in auto mode, the outdoor temperature can be dis-
played by pressing the More key.
MON
TUE
WED
THU
FRI
SA
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
CHANGE FILTER UV LAMP HUMIDIFIER PAD
FAN
Set
AUTO
Heat On
Following
Schedule
SYSTEM
Outside
HEAT
AM
SCHED
HOLD
CLOCK SCREEN MORE
M19971
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Reminder Timers
These reminders notify you when to change your furnace filters, humidifier pad, or other
accessories. When the time you set expires, the Comfort Control flashes “Change” and then “Filter”
or “Change” and “Humidifier Pad” until you reset the timer.
NOTE: See Steps 11 through 13.
Resetting Expired Timers
When a Timer expires, a Reset key appears on the Home Screen. Press Reset key to reset the
Timer. Notice that the “Change” reminder disappears from the Comfort Control screen. If more than
one Timer expires at the same time, press the Reset key to reset all expired Timers.
MON
TUE
WED
THU
FRI
SA
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
CHANGE FILTER UV LAMP HUMIDIFIER PAD
FAN
Inside
Set To
AUTO
Following
Schedule
SYSTEM
HEAT
PM
SCHED
HOLD
CLOCK SCREEN MORE
M19975
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View or Reset Timer Settings Before They Expire
1. Press More key until the Timer you want to modify appears on the screen.
2. Press Edit key to change the Timer reload value. Use Up and Down arrow keys to change the
number of Run Time Days. See Advanced Settings, steps 11 through 13, for approximate
calendar days.
3. Press the Done key to go back to viewing the selected timer.
4. Press Reset key to reset the timer to the timer reload value. (This is the Advanced setting you
set or the reload value you selected in step 2.)
5. Press Done or Cancel key to return to the Home Screen.
Screen Locked
You can fully or partially lock out the keys on the touch screen interface. See “Advanced Settings” on
page 34 for information on turning these features on or off. If the Comfort Control shows “Screen
Locked,” your Comfort Control screen is either fully or partially locked.
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Partially Locked Screen
When partially locked, the screen indicates Screen Locked for 5 to 7 seconds whenever the user
attempts to press a key that is locked. Pressing a locked key while Screen Locked is shown flashes
Screen Locked on the screen. Pressing an unlocked key while Screen Locked is active removes the
screen lock.
In this mode, all keys are locked except the Temperature Up and Down arrow keys:
— User can change temperature up or down but cannot change schedule settings.
— Temporary temperature change lasts until next scheduled period and that time shows onscreen.
— To cancel temperature override and begin following schedule, press Cancel key.
— To unlock screen, see “Advanced Settings” on page 34.
TU
SCREEN LOCKED
FAN
Inside
Set
AUTO
Following
Schedule
SYSTEM
HEAT
SCHED HOLD CLOCK SCREE MORE
M19965
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Fully Locked Screen
In this mode, all keys are locked and not functional. To unlock screen, see “Advanced Settings” on
page 34. The screen continuously displays “Screen Locked”.
READING YOUR INSIDE HUMIDITY LEVEL
The communicating Comfort Control can sense the humidity level in the home. The humidity level in
the home is shown in the lower right corner of the Home Screen.
NOTE: If the communicating Comfort Control is in auto mode, the indoor humidity level can be
displayed by pressing the More key.
NOTE: CONTINUOUS fan mode during COOLING
TUE
operation may not be appropriate in humid cli-
mates. The Trane Proprietary Humidity Control
might disable continuous fan function. See
“Trane Proprietary Humidity Control” on
page 28 for additional information. If the indoor
air exceeds 60% relative humidity or simply
feels uncomfortably humid, it is recommended
that the fan only be used in the AUTO mode.
FAN
Inside
Set
AUTO
Following
Schedule
SYSTEM
HEAT
PM
Humidity
SCHED
HOLD
CLOCK SCREEN MORE
M19966
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CONTROLLING YOUR INSIDE DEHUMIDIFICATION SETTING
If the dehumidification control has been enabled, the communicating Comfort Control will read the
inside humidity level and set a desired humidity level to help dehumidify the house.
1. Press the More key until the inside humidity percent and dehumidification setpoint are shown.
2. Use Up and Down arrow keys, located to the right of the dehumidifier setpoint, to set your
desired humidity level for dehumidification in the summer.
Inside
Inside
Humidity
DEHUMIDIFIER
%
DONE
CANCEL
M19967
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NOTE: The dehumidification setpoint can range from 40% to 80% in 5% increments. The default
dehumidification setpoint is 50%.
3. Press Done key to save your changes and return to the Home Screen.
4. Press Cancel key to return to Home Screen without saving any changes.
Dehumidification Control
If the dehumidification control has been enabled, the communicating Comfort Control attempts to
control to this dehumidification setpoint by turning on the air conditioner. In extremely high humidity
conditions, Comfort Control keeps the air conditioner running for up to 3°F below your temperature
setpoint. It does this when trying to achieve your desired humidity setpoint and balance that with
your temperature setpoint.
NOTE: If auto changeover is selected, the deadband can be no closer than 5 degrees with
dehumidification enabled.
Trane Proprietary Humidity Control
When enabled, this feature will disable any blower off delays and disable continuous fan mode when
the indoor humidity is above the dehumidification setpoint. This will help prevent coil condensation
from being evaporated back into the air stream.
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CONTROLLING YOUR INSIDE HUMIDIFICATION SETTING
If the humidification control has been enabled, the communicating Comfort Control will read the
inside humidity level and set a desired humidity level to help humidify the house.
1. Press the More key until the inside humidity percent and humidification setpoint are shown.
2. Use Up and Down arrow keys, located to the right of the humidification setpoint, to set your
desired humidity level for humidification in the winter.
Inside
Inside
Humidity
HUMIDIFIER
%
DONE
CANCEL
M19967
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NOTE: The Humidification setpoint can range from 10% to 60% in 5% increments. The default
humidification setpoint is 50%.
3. Press Done key to save your changes and return to the Home screen.
4. Press Cancel key to return to Home screen without saving any changes.
Humidification Control
If the humidification control has been enabled, the Comfort Control attempts to control to this
humidification setpoint by turning on the humidifier.
Frost Control
TM
If your ComfortLink II communicating system is equipped with an outdoor temperature sensor and
a humidifier, you can use the frost control feature to control window condensation during the heating
season. Frost control works by reducing humidification when conditions indicate that condensation
or frost can occur.
The degree of frost control is determined by the setting you choose between 0 and 10. Press More
key until you come to the frost setting screen. The display shows FROST and a number from 0 to 10.
When the factory setting (5) results in too much condensation or frost on the windows, lower the
setting. When the air seems too dry, raise the setting.
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Temperature Recovery
Your Comfort Control comes with a feature called Adaptive Intelligent Recovery (AIR), which
eliminates all guesswork when setting your schedule. How long does it take the furnace to warm
your house in the morning before you get out of bed or how long does it take the air conditioner to
cool your house in the afternoon before you return from work? No problem. The Comfort Control
determines that for you.
Simply set your program schedule to the time you want the house to be at your comfort temperature.
The Comfort Control then turns on the heating or cooling at just the right time to have your home
reach your scheduled temperature at your scheduled time.
For example: you get out of bed at 6:00 AM and want the temperature to be 70°F (21.1°C). Set the
0
Wake period for 6:00 AM and 70 F (21.1°C). The Comfort Control then turns on the heat before
0
6:00 AM to raise the temperature to 70 F (21.1°C) by 6:00 AM.
The Comfort Control alerts you that the heating or cooling system is coming on before a scheduled
time by showing “Recovery” on the screen.
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TUE
FAN
Inside
Set
AUTO
Following
Schedule
Recovery
SYSTEM
HEAT
PM
Humidity
SCHED
HOLD
CLOCK SCREEN MORE
M19968
IMPORTANT
It takes about a week for the Comfort Control to adjust to local weather, your schedule, the
construction of your home and your heating and/or cooling system. Your Comfort Control
learns from experience. Each day it checks how closely it reached the recovery time and
adjusts the next day’s recovery start time accordingly.
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Advanced Heat Pump Features
SET CURRENT DAY
SET MONTH
If you have a heat pump heating system, your Comfort Control
can use some special features when used with an Outdoor
Temperature Sensor, such as compressor and/or backup heat
lockout based on outside temperature. For example, if your
backup heat does not turn on above a designated outside
temperature, your system uses an advanced heat pump
feature.
MON
TUE
WED
THU
FRI
SAT
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
CHANGE FILTER UV LAMP HUMIDIFIER PAD
DONE
Setting the Calendar
This Comfort Control is designed to automatically keep current
time and day in memory for up to ten years, under normal use,
once the calendar is set. There are two ways to set the
calendar for this Comfort Control:
USE ARROWS TO SET YEAR AND TIME
MON
WED
THU
FRI
SAT
SUN
OK TO PICK MULTIPLE DAYS SCREEN LOCKED
CHANGE FILTER UV LAMP HUMIDIFIER PAD
SETTING CALENDAR AFTER COMFORT CONTROL IS ALREADY
FUNCTIONING
See steps 1 through 4, in “Advanced Settings” on page 34, to
set year, month and day.
PM
DONE
SETTING CALENDAR WHEN COMFORT CONTROL IS FIRST POWERED
When this Comfort Control is first powered, the display is ready
to set the calendar.
M22645
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ADVANCED SETTINGS
Your Comfort Control has many advanced settings to match your heating and cooling system. But
you can change these settings to match your lifestyle:
1. From the Home Screen, press the System key. Five blank touch keys show on the bottom of
the screen between the Done and Cancel keys.
2. Press and hold the center blank key for approximately five seconds, until the screen changes.
TUE
CHANGE FILTER UV LAMP HUMIDIFIER PAD
Inside
Set To
Following
Schedule
SYSTEM
EM HEAT
OFF
PM
COOL
DONE
CANCEL
M22653
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