Trane XT500C User manual

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OWNER’S GUIDE
XT500C Deluxe Programmable
Heat Pump Thermostat
Pub. No. 22-5128-02
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TABLE OF CONTENTS
CUSTOMIZING YOUR THERMOSTAT ............................................................................................................. 5
Program Options Set-Up by Your Trane Dealer ............................................................................................ 5-6
GETTING AROUND THE KEYBOARD ............................................................................................................. 7-8
Emergency Heat ........................................................................................................................................... 9
Auxiliary Heat ................................................................................................................................................ 9
FEATURES ........................................................................................................................................................ 10
FEATURES YOU’LL WANT TO KNOW MORE ABOUT................................................................................... 11
Comfort-R Comfort Enhancement System .................................................................................................... 11
Adaptive Intelligent Recovery Control ........................................................................................................... 12
The Optimum Comfort and Energy Savings Solution ............................................................................... 13
NEAT STUFF YOU’LL BE USING OFTEN ....................................................................................................... 15
Setting Temporary Temperatures .................................................................................................................. 15
Changing Temperature Setting Until the Next Schedule Period.................................................................... 15
Changing Temperature Setting Indefinitely ................................................................................................... 17
Vacation Mode............................................................................................................................................... 20
Information Key ............................................................................................................................................. 24

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Displaying Outdoor Temperature................................................................................................................... 24
Displaying Current Settings ........................................................................................................................... 25
Filter Indication .............................................................................................................................................. 26
Setting or Resetting Filter Indication Timer ................................................................................................... 26
PROGRAMMING YOUR THERMOSTAT .......................................................................................................... 29
Clock ............................................................................................................................................................. 29
Setting Current Day and Time ....................................................................................................................... 29
Setting System and Fan ................................................................................................................................ 32
Set System .................................................................................................................................................... 32
Set Fan .......................................................................................................................................................... 32
7-Day Program and Operation ...................................................................................................................... 33
7-Day Preprogrammed Schedule .................................................................................................................. 33
Customizing Your Own 7-Day Schedule ....................................................................................................... 35
Programming the First Day ........................................................................................................................... 39
Copying a Day ............................................................................................................................................... 44
Clearing Schedule Period ............................................................................................................................. 47
24-Hour Program and Operation ................................................................................................................... 50
24-Hour Preprogrammed Schedule .............................................................................................................. 50
Customizing Your Own 24-Hour Schedule .................................................................................................... 51
Programming Your 24-Hour Schedule .......................................................................................................... 52
Constant Temperature Setpoint Programming .............................................................................................. 57
Setting Temperature and Fan Operation ....................................................................................................... 57

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TROUBLESHOOTING....................................................................................................................................... 60
DEFINITIONS .................................................................................................................................................... 63
INDEX ................................................................................................................................................................ 66
LIMITED WARRANTY ....................................................................................................................................... 67
CUSTOMER ASSISTANCE ............................................................................................................................... 68

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CUSTOMIZING YOUR THERMOSTAT
Program Options Set-Up by Your Trane Dealer
Your Trane dealer has programmed your thermostat using the options checked below. For example, your
thermostat displays temperatures in degrees Fahrenheit if the checkbox next to Fahrenheit (
° F) is checked.
Contact your Trane dealer to reprogram any of the options listed.
NOTE: If no options are checked, those listed in the first column are the factory settings on your thermostat.
Refer to the Definitions section for a description and comparison of Adaptive Intelligent Recovery™Control (a
Honeywell trademark) to Conventional recovery.

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NOTE: The XT500C thermostat is manufactured for the Trane Company by Honeywell Inc. Specific features
are unique to Trane and are only available on Trane models.
Comfort-R™ Control ❑ Off ❑ On
Adaptive Intelligent
Recovery™ Control
❑ On ❑ Off (Conventional recovery)
Cooling Droop ❑ On ❑ Off
Temperature Display ❑ Fahrenheit (°F) ❑ Centigrade (°C)
Clock Format ❑ 12-Hour Clock Format ❑ 24-Hour Clock Format
System Setting
(Heating and Cooling
Setting)
❑ Auto/Manual (System
automatically selects
Heat or Cool; You can
select Em. Heat, Heat,
Cool or Off.)
❑ Manual Only (You
select Em. Heat, Heat,
Cool or Off.)
❑ Auto only (System
automatically
selects Heating or
Cooling.)
Outdoor Temperature
Display
❑ No outdoor
temperature is
displayed
❑ Outdoor temperature
is displayed (requires
an outdoor sensor).
Programming ❑ 7-Day Programming ❑ 24-Hour Programming ❑ Constant Temp-
erature Setpoint
Programming

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GETTING AROUND THE KEYBOARD
The keyboard is located behind the thermostat cover. Three frequently used keys are located next to the display
(Increase temperature setting, Decrease temperature setting, and Information key). The thermostat displays
important information such as day, time, schedule period, temperature, filter indicator, system and fan operation.
WHAT'S THE ROOM TEMPERATURE?
WHAT TIME IS IT?
WHAT DAY IS IT?
CURRENT PROGRAMMING
PERIOD (EXAMPLE
DISPLAY SHOWS "WAKE")
CURRENT SYSTEM
SETTING (EXAMPLE
DISPLAY SHOWS "HEAT")
CURRENT FAN
SETTING (EXAMPLE
DISPLAY SHOWS "AUTO")
DISPLAY IS BACKLIT
FOR EASY READABILITY
WHEN A KEY IS PRESSED. DECREASE TEMPERATURE SETTING.
INCREASE TEMPERATURE SETTING.
INFORMATION AT YOUR FINGERTIPS!
DISPLAY THE OUTDOOR
TEMPERATURE (ON SOME MODELS),
CHECK YOUR CURRENT TEMPERATURE
SETTINGS, OR DISPLAY FILTER USE
IN NUMBER OF DAYS.
DAYLIGHT
SAVINGS TIME
INDICATOR
FILTER
EXPIRATION
INDICATOR

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M13301
Time Set Program
SystemFilter Fan
Run
Program
Hold Temp
Set Current
Day/Time Wake Leave Return Sleep
Day Heat/Cool
Settings
Daylight
Time Copy
NO NEED TO WORRY ABOUT
PRESSING THE WRONG KEY!
RUN PROGRAM, RETURN
TO NORMAL OPERATIONS,
OR UNDO LAST ACTION.
HOLD MODE: OVERRIDE
NORMAL PROGRAMMING
OPERATION, OR GO
INTO VACATION MODE!
SET CURRENT DAY AND TIME (INITIALLY
AND AFTER EXTENDED POWER OUTAGES).
SET CURRENT OR
PROGRAM DAY
EASILY CHANGE
BETWEEN STANDARD AND
DAYLIGHT SAVINGS TIME EASY PROGRAMMING!
COPY ONE
PROGRAMMED DAY
TO ANOTHER DAY
SWITCH BETWEEN
HEATING AND COOLING
TEMPERATURE SETTINGS
PROGRAM SCHEDULING KEYS
PROGRAM UP TO FOUR TIME
PERIODS AND TEMPERATURES
FOR EACH DAY OF THE WEEK.
TIME KEYS
INCREASE OR
DECREASE TIME
SETTING FOR
CURRENT OR
PROGRAMMED
TIMES.
SELECT SYSTEM OPERATION
(EM. HEAT, HEAT, COOL, OFF, AUTO).
NO MORE GUESSING! SELECT
FILTER EXPIRATION TO REMIND
YOU TO CHANGE THE FILTER.
CHOOSE FAN OPERATION (ON OR
AUTO), OR CHOOSE FAN OPERATION
FOR EACH PROGRAM PERIOD OF
THE DAY ON SELECT MODELS.
Time
M17032
Set Program
Wake Leave Return Sleep
SET WAKE TIMES
AND TEMPERATURES
SET LEAVE TIMES
AND TEMPERATURES
SET RETURN TIMES
AND TEMPERATURES
SET SLEEP TIMES
AND TEMPERATURES

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Emergency Heat
The Emergency Heat feature allows you to “turn on”
the electric heat section of the system by moving the
system switch to the Em. Ht. position. The LED lights
and the thermostat displays “Em. Ht.” when the
system calls for emergency heating. The thermostat
may also display “Aux. Ht.” if the system calls for
additional back-up heating (see figure to right).
When the heat pump requires servicing, the LED
lights and the system automatically activates emer-
gency heat. After contacting your service technician,
clear the LED signal by moving the system switch to
Em. Ht. then back to Heat or Auto.
Auxiliary Heat
The auxiliary heaters assist the heat pump under
normal conditions when low outdoor temperature
occurs. The auxiliary heaters may also operate while
in the recovery mode to maintain comfort level. The
thermostat displays “Aux. Ht. ” (see figure above)
when the auxiliary heating equipment operates.
Aux Ht
System
M13302
Em Heat
Em Ht
EM HT DISPLAYS WHEN SYSTEM CALLS FOR
HEAT IN EMERGENCY HEAT MODE.
EM HT DISPLAYS WHEN SYSTEM SWITCH
IS IN EMERGENCY HEAT POSITION.
AUX HT DISPLAYS WHEN SYSTEM CALLS FOR
ADDITIONAL BACK-UP HEATING DURING NORMAL
CONDITIONS
OR IN EMERGENCY HEAT MODE.
FLAME DISPLAYS DURING CALL FOR HEAT.

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FEATURES
• Worry-free programming.
• Comfort-R Comfort Enhancement Process—a
unique Trane feature.
• Adaptive Intelligent Recovery Control for
comfort and energy savings.
• Wake, Leave, Return and Sleep at the comfort
level you select.
• Customize the program schedule—program
your own schedule to fit your needs.
• Continuous comfort and energy savings—
adjust the schedule as often as you like.
• Temporary schedule override—set the
thermostat higher or lower for the current
program schedule.
• Vacation mode (1 to 255 days) for added
comfort and energy savings. Set the
temperature higher or lower for energy savings
while on vacation. At the same time, set the
comfort level you want when you return.
• Permanent schedule override—set the
thermostat higher or lower indefinitely.
• Set the filter indicator (0, 7, 14, 21, 30, 45, 60,
90, 120, 180, 270, or 360 days) to remind you to
change the filter.
• Information at the press of a button—use the
Information Key to find out the outdoor
temperature (optional accessory), the current
setpoints, or the filter status.
• No batteries needed—your thermostat retains
the schedule for the life of the product. You
never have to reprogram the schedule even
after a power outage. (The day and time may
need to be reset after an extended power
outage.)
• Set or reset the day and time as needed—you
can even set Daylight Savings Time.

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FEATURES YOU’LL WANT TO
KNOW MORE ABOUT
Comfort-R Comfort Enhancement System
Comfort can best be described as the proper balance
of temperature and relative humidity, also known as
“your comfort index.” The greatest level of comfort is
achieved when the temperature and relative humidity
are in balance with your body. When the relative
humidity is low, you feel comfortable at a higher
temperature. Likewise, when the relative humidity is
high, you feel comfortable only at a lower tempera-
ture. However, if the relative humidity becomes too
high, then true comfort cannot be achieved at any
temperature.
The Comfort-R™ system is specifically designed to
enhance the moisture removal process of your air
conditioning system and to make the air drier. This
system is so unique, it received a patent from the U.S.
Patent Office. During times of high relative humidity,
as well as during mild weather, the Comfort-R system
increases the moisture removal ability of your air-
conditioning system. This results in a lower relative
humidity inside your home, which in turn, allows you
to feel more comfortable. The resulting lower relative
humidity also allows you to maintain the temperature
setting on your thermostat at a higher temperature.

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Adaptive Intelligent Recovery Control
Your Thermostat Senses Temperature
More Like You Do
Your new thermostat is so smart, it’s almost human. You
perceive temperature from a variety of sources, not only
from the air in the room, but also from your surrounding
walls, windows and furnishings. Humans feel differences
in temperature as slight as two degrees Fahrenheit.
Common household thermometers and standard
thermostats sense only air temperature, which may not
reflect how hot or cold the room actually feels to you.
Your new thermostat reads both the temperature of the
wall and the air, and responds to temperature changes
as little as one degree Fahrenheit, so room temperature
is more likely to feel right to you and your family.
The Deluxe Programmable Heat Pump Thermostat acts
like a computer. When calculating the time to turn on
your heating or cooling system, it considers (1) air
temperature, (2) wall temperature, and (3) the time you
want to reach the comfort temperature. After considering
these three things, Adaptive Intelligent Recovery™
control gradually changes the temperature from the
energy savings setting to the comfort setting (for
example, from a heating temperature of 62°at night to
70°in the morning).
The system runs continuously until the comfort tempera-
ture you choose is reached without overshooting the
setting. This saves energy. How do you know when the
system is in recovery? The thermostat displays In
Recovery whenever the thermostat activates Adaptive
Intelligent Recovery Control. So, In Recovery displays
during the recovery time from Sleep to Wake and from
Leave to Return.
M10344
Auto
System Fan
Mon In
Room
AM
Recovery
Sleep
Heat
In Recovery indication shown in example above.

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After installation or new schedule programming, your
thermostat learns from experience. How? Each day it
checks how closely it hit the recovery target (for
example, 70°at 6:00 AM) and adjusts the next day’s
recovery start time accordingly. After four to eight
days, the thermostat has adjusted to local weather,
your lifestyle, the construction of your home, and your
heating and cooling system.
The Optimum Comfort and
Energy Savings Solution
In this example, Adaptive Intelligent Recovery Control
starts to recover at 4:00 AM and reaches the comfort
temperature of 68°at 7:00 AM. Recovery time varies
with the starting temperature and the comfort tem-
perature you choose.
Your new thermostat saves energy and keeps you
comfortable at the same time. By now you may be
wondering how to program your thermostat and how
to use some more time and energy-saving features.
First, let’s look at features you’ll be using often, like
how to override the current programming mode or
hold the thermostat at a specific temperature while
you go on vacation. You can even program the
thermostat to return to normal scheduled program-
ming on your last day of vacation so you don’t have to
worry about energy saving while you are gone or not
being comfortable when you return.

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AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN NIGHT TEMPORARY UNOCCUIPIED
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN NIGHT TEMPORARY UNOCCUIPIED
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
WAKE LEAVE RETURN NIGHT TEMPORARY UNOCCUIPIED
SET
PT
AM
PM
SUN MON TUE WED THU FRI SAT COOL ON HEAT ON
MORNING LEAVE RETURN SLEEP TEMPORARY UNOCCUIPIED
SET
PT
At 4:00 AM
Recovery Begins
At 5:00 AM
Recovery
Continues
At 6:00 AM
Recovery
Continues
At 7:00 AM System
Operating in Comfort Mode
ENERGY
SAVINGS
PERIOD RECOVERY FROM ENERGY SAVINGS COMFORT
PERIOD
TIME
TEMPERATURE
THE THERMOSTAT USES THE SAME SCHEME TO RETURN GRADUALLY
TO LOWER COMFORT TEMPERATURE DURING THE COOLING SEASON.
M17033

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NEAT STUFF YOU’LL BE USING OFTEN
Setting Temporary Temperatures
If your thermostat is set for 7-Day or 24-Hour Operation, you can override the current schedule period and
change the temperature setting until the next schedule period, or change the temperature setting while you are
on vacation. You can also change the temperature setting indefinitely.
Changing Temperature Setting Until the Next Schedule Period
NOTE: This feature does not apply to Constant Temperature Setpoint Programming.
M17035
Temporary Setting
Press Increase ▲or Decrease ▼until the desired
temperature setpoint displays.
While selecting a temporary setting, only the setpoint displays.

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The temporary temperature setting you select displays for approximately 3 seconds. The display reads
Temporary until the next period begins, or you cancel the Hold.
IMPORTANT
To cancel the Hold before the designated
time, press Run Program.
After selecting a temporary setting, display reads Temporary until canceled.
Example displays shows temporary heat setting of 70°at 6:00 AM.
Run
Program
M12984
Auto
Fan
Mon
AM
Temporary
Heat
System
Heat
NOTE: If “▲” or “▼” appears under the temperature display, it means that both the heating and cooling
setpoints are being adjusted. Tapping the key changes both the heat and cool setpoints by one degree.
Press after the desired setpoint is reached to verify the setpoints.
NOTE: While in temporary operation, the thermostat uses conventional recovery for that period only. The
thermostat assumes you desire to maintain the temporary setting until the end of the period.

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Changing Temperature Setting Indefinitely
NOTE: This feature does not apply to Constant Temperature Setpoint Programming.
NOTE: The current time does not display while in this mode.
Hold Temp
1. Press Hold Temp once.
Pressing Hold Temp once displays the thermostat in Hold mode.
Example display shows temporary heat setting of 60°.
M17040
Auto
Fan
Heat
Setting
System
Heat

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2. Press Increase ▲or Decrease ▼to
change the temperature setpoint, if desired.
M17041
Auto
Fan
Heat
Setting
System
Heat
By pressing the Temperature keys, you can select a temporary temperature.
This temperature setting remains until the hold is canceled.
Example displays shows heat set to 61°.
3. Press Heat/Cool Settings to change
between heat and cool settings.
Heat/Cool
Settings
M17042
Auto
Fan
Cool
Setting
System
Heat
Pressing Heat/Cool Settings displays the other temperature setpoint.
Example displays shows temporary cooling setting of 78°.

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4. Press Increase ▲or Decrease ▼to adjust
temperature settings.
M17043
Auto
Fan
Cool
Setting
System
Heat
Pressing the Temperature keys changes the temporary temperature.
Example displays shows temporary cooling setting of 80°.
NOTE: The display changes from the setpoint to the room temperature after approximately 3 seconds.
IMPORTANT
To cancel the Hold, press Run Program.
Run
Program

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Vacation Mode
NOTE: This feature does not apply to Constant Temperature Setpoint Programming.
1. Press Hold Temp twice.
Pressing Hold Temp twice displays the thermostat in Vacation mode.
Example displays shows temporary heat setting of 60°.
M17036
Auto
Fan
HeatDaysMon
Wake
Hold for
Setting
System
Heat
Hold Temp