AIR FILTER MONITOR
The Air Filter Monitor counts the number of days, and the amount of usage since
your filter has been replaced. In Run mode, the CHANGE FILTER indicator will
Install two new Energizer
appear when the remaining filter days have reached zero and the filter should be
size alkaline batteries before continuing further.
changed. To set and use the Air Filter Monitor, turn the rotary dial to AIR FILTER.
TX500E Programmable Thermostat
Ensure that the batteries are installed in the
Press NEXT and the Filter Days Left value will start flashing. Use the UP or DOWN
proper direction as per the markings shown in
buttons to select the number of days of filter life that your filter is rated for. Setting
the battery tray.
this value to OFF will disable the filter monitor. Return the dial to the RUN position
WARNING: Use Energizer
Alkaline Batteries Only.
once you are finished setting the filter life. To monitor the Filter Days Left or Filter
is a registered trademark of Eveready Battery Company, Inc.
Percent Left, turn the dial to the AIR FILTER position. The amount of filter life
is a registered trademark of The Gillette Company, Inc.
remaining will be shown in the clock portion of the display screen. Return the dial
All of the settings, options, and components listed in this section are located on the
to the RUN position once you are finished viewing the filter life remaining.
Mt. Laurel, New Jersey 08054, USA
rear of the thermostat, on the circuit board.
RESET FILTER COUNTER
Once you have replaced your filter, the filter life counter is reset back to its full
Thank you for your confidence in our product. To obtain the best results from your
The hardware reset is a push button that is located on the right edge of the circuit
amount remaining value by turning the dial to AIR FILTER and pressing the UP and
investment, please read these instructions and acquaint yourself with your
board, just above the battery location. This reset button is used by the thermostat
DOWN buttons together at the same time. NOTE: The counter is also reset by
to reset the unit's clock, and read the position of all of the option switches. When
changing the filter setting value, as described above, to a different number of days.
any of the following items are changed, the hardware reset button must be pushed
for the change to be recognized. User temperature programs are not erased when a
hardware reset is performed.
This thermostat can be used with most single stage 24 volt: gas, oil or electric
J P 1
heating and/or cooling systems, single stage heat pumps, or gas Millivolt heating
systems. It cannot be used with 3-wire zone valves, 120 volt heating systems, or
A thermostat works by turning your heating or cooling system on and off whenever
multi-stage heat pumps. Ask your dealer for other LUX thermostats to control those
This is a plastic jumper cap which
the room temperature varies from the set-point temperature. The amount of this
can be in one of two positions,
variation is called the "swing." Your system should cycle on about 3 to 6 times per
GAS or ELECTRIC.
hour. A smaller swing number increases the number of cycles per hour, so the
G A S
room temperature is more precise and constant. A larger swing number decreases
the number of cycles per hour, but saves energy in most cases. To change the
The Furnace Mode setting determines how the thermostat controls the fan
LCD - Liquid Crystal Display
Set Temperature Buttons
Swing setting, turn the dial to RUN mode. Hold down the NEXT button and push the
operation. This setting has no effect in Cool Mode. While in Heat Mode, with the
HOLD button once, then let go of both. The words SWING and SET will appear on
jumper in the Gas position, the fan is controlled by your furnace. With the jumper
the screen with a number. Use the UP/DOWN buttons to change the number value
in the Electric position, the fan is controlled by the thermostat and is turned on
between 1 and 9. Number 1 is the default setting. Press the NEXT button to accept
when the heating terminal becomes energized.
the setting and return to normal Run mode.
The following option settings are all located within a group of small switches
TE M ER ATU R E
labeled 1 through 3 as shown below, and are located in the center of the circuit
R E S E T
The internal temperature sensor in this thermostat is accurately calibrated at the
H E AT
A U T O
O F F
factory. The Temperature Calibration feature allows you to manually offset the
C O O L
R U N
measured temperature by as much as plus or minus 5°F (3°C) degrees from its
original value. This feature can be useful to match this thermostat to another one
or more, if multiple thermostats are used in the same home. To change the
Temperature Calibration, turn the dial to RUN mode, and place the Temperature
mode switch in the OFF position. Hold down the UP button and push the DOWN
button once, then let go of both. The words CAL and SET will appear on the screen
• Small elegant design
• 12/24 Hr Clock Display
with a number. Use the UP/DOWN buttons to change the number value between -
• Exclusive LUX Speed Dial
• Adjustable Temperature Differential /
5°F (-3°C) and +5°F (+3°C) degrees. 0 degrees of correction is the default setting.
• Air Filter Monitor
This determines how the thermostat displays the clock and all other times on the
Press the NEXT button to accept the setting and return to Run mode.
• 5-2 Day Programming
• User Temperature Offset /
screen. Switch position OFF is 12 HR, and ON is 24 HR.
• Energy Star Compliant
• 4 Periods Per Day
• 5 Minute Minimum Run/Off Time For
To prevent tampering with any of your settings or temperatures, most of the front
• Battery Free Memory Storage
Short Cycle and Compressor
This determines how the thermostat displays all temperatures on the screen.
panel buttons can be locked out by pressing the following four-button sequence:
• Temporary Temperature Override
Switch position OFF is F°, and ON is C°.
NEXT, NEXT, NEXT, HOLD. This sequence of keys will lock and also unlock these
• Temperature Hold
items: UP, DOWN, NEXT, HOLD, the Rotary Dial, and the Software Reset button.
• Keyboard Lockout
Neither of the Mode slide switches are locked out. When the Keylock is activated, a
• F/C Temperature Display
This determines how the remaining filter life will be displayed when the rotary dial
padlock icon will be visible in the area above the clock as shown below.
is turned to the AIR FILTER position. In the Percent (%) mode, the display will
count down the percentage of air filter life remaining before a filter change is
recommended. In the Days mode, the display will count down the number of
calendar days remaining before a filter change is recommended. Switch position
Please read ALL of these instructions carefully before beginning installation.
OFF is Percent mode, and ON is Days mode.
Save them for future reference.
FRONT PANEL ITEMS
• #1 Phillips screwdriver
The Keylock will be disabled if the Hardware Reset button is pressed.
• Drill with 3/16 in. (4.8mm) bit
• Wire Stripper / Cutter
The software reset is a small recessed push button that is located right above the
NEXT button. This button can be pushed with a pencil or the end of a paper clip.
CAUTION: This thermostat is protected against normal minor static electric
This reset clears all of the heating and cooling programs, filter settings, and other
discharges, however to minimize the risk of damaging the unit in extremely dry
For all of the programming areas that are described below, this thermostat provides
user changeable preferences to their default values. You should write down your
weather, touch a grounded metal object before touching your thermostat.
four independent periods per day for Heat mode and Cool mode, they are: MORN,
heating and cooling program times and temperatures prior to using the software
DAY, EVE, and NITE. Each period ends at the start time of the following period. The
programs for each Temperature mode are programmed separately. When you
On replacement installations, mount the new thermostat in place of the old one
perform a Software Reset, an Energy Star
approved program is inserted into all of
unless the conditions listed below suggest otherwise. On new installations, follow
the program periods. You can use these default programs or alter any portion of
There are two mode switches on the front, a Temperature mode switch and a Fan
the guidelines listed below.
them to suit your own preferences. When setting the program items, the value that
mode switch. The Temperature mode switch has three positions: HEAT, OFF, and
1. Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the floor, and
is flashing is the item that you can change at that time.
COOL. In the winter, set the system switch to HEAT to control your heating system.
in a room that is used often.
In the summer, set the switch to COOL to control your air conditioner. In the spring
2. Do not locate where air circulation is poor, such as in a corner or an alcove, or
SET WEEKDAY PROGRAM
and fall or when the windows are open, you can set the switch OFF. The Fan mode
behind an open door.
Select either HEAT or COOL with the Temperature mode switch. Rotate the dial to
switch has two positions, AUTO and ON. Setting the Fan mode switch to AUTO,
3. Do not install it where there are unusual heating conditions, such as: in direct
WEEKDAY PROGRAM. You will be programming all five weekdays at the same time.
automatically runs your system's blower fan as required only during heating and
sunlight; near a lamp, television, radiator, register, or fireplace; near hot water
The first period is MORN. Using the UP and DOWN buttons, set the start time for
cooling activation. Setting the Fan mode switch to ON, runs your system's fan
pipes in a wall; near a stove on the other side of a wall.
this period, and then push the NEXT button to proceed. Now set the desired set
continuously, even if heating or cooling is not needed, including when the
4. Do not locate in unusual cooling conditions, such as: on a wall separating an
temperature for the MORN period using the UP and DOWN buttons, and push NEXT
Temperature mode switch is in the OFF position to provide air circulation only.
unheated room; or in a draft from a stairwell, door, or window.
to proceed. Now set the start time and set temperature for the DAY period,
5. Do not locate in a damp area. This can lead to corrosion that may shorten
pushing NEXT after each to advance. Continue with these same steps to set the
start time and set temperature for the EVE, and NITE program periods. When you
The Fan mode switch only works if your system provides a wire for the
6. If painting or construction work has yet to be completed, cover the unit
are finished setting all four periods, you may continue pushing the NEXT button
thermostat's "G" wire terminal.
completely or do not install it.
through all four periods to review your entries, or turn the dial to RUN if you are
finished. These same programming steps for all four periods must be performed in
both Heat and Cool Temperature modes independently.
• Read instructions carefully before removing any wires from your existing
There are four primary push buttons on the front of the thermostat: The UP and
DOWN arrow keys, the NEXT button, and the HOLD button.
SET WEEKEND PROGRAM
• Do not short (jumper) across the electric terminals on the furnace or air
Turn the dial to WEEKEND PROGRAM. You will be programming both Saturday and
conditioner to test the system. This may damage the thermostat and void your
Sunday at the same time. You will begin with the start time of the MORN period,
The LUX Speed Dial
provides an easy way to quickly navigate between the different
and use the same procedures that were performed while setting the Weekday
• This thermostat should be limited to 1.5 amps per terminal, and a maximum
programming areas. This rotary dial has five individual positions.
Program periods, using the NEXT button to advance through the values. Return the
of 2 amps total; higher current than this may cause damage to the thermostat.
dial to the RUN position when you are finished.
• All wiring must conform to the local codes and ordinances that are in your
BATTERIES AND MAINTENANCE
• Your thermostat is a precision instrument, please handle it with care to avoid
Rotate the dial to the SET DAY/TIME position. You should see the word SET appear
on the display, along with the clock and a day of the week that is flashing. With the
This thermostat can be powered either by "AA" alkaline batteries, by 24VAC system
REMOVAL OF OLD UNIT
day flashing, press the UP button to advance the day to the desired day. Press the
common power, or a combination of both. If you are using batteries alone, the
1. Turn OFF the electricity to all heating and cooling components.
NEXT button, this should cause the time to start flashing and the day to remain on
batteries should be replaced AT LEAST once per year, or sooner if the LOW BAT
Do not turn the electricity back on until all work is completed.
steady. Using either the UP or DOWN buttons, adjust the clock to the desired time.
battery symbol appears in the lower left
2. Remove the cover and front portion of your old thermostat to
The clock digits will increment rapidly if either the UP or DOWN buttons are held in
portion of the display screen as shown
expose the wiring connections.
the pressed position.
3. Write down the letters printed near each wire terminal that is
used, and the color of the wire that is connected to it. Using the
HEATING AND COOLING
enclosed labels, attach a label to each of your wires so that the
Basic operation of your heating or cooling system can be obtained by ensuring that
To replace the batteries in the thermostat,
letter matches the marking on your existing thermostat.
the rotary dial is in the RUN position, and simply moving the Temperature mode
remove the thermostat's body from the
4. When they are all labeled, carefully remove the wires one at a time, making sure
switch to either the HEAT or COOL position. Prior to being set initially with your
base plate attached to the wall by pressing the thumb latch at the bottom center of
that they do not fall back inside the wall. Do not allow any of the bare wire ends to
custom temperature program, and also after a Software Reset, the thermostat will
the unit and swinging the body towards you, up and away from the base. Remove
touch each other, or any parts on the thermostat.
follow the default Energy Star
approved temperature routines that are preset within
the used batteries from the battery tray and discard appropriately.
5. Loosen all of the screws on the old thermostat and remove it from the wall.
the thermostat's memory, as shown below.
Install two new Energizer
, "AA" size alkaline batteries into the
battery tray. Observe the polarity markings shown in the battery compartment to
1. Strip insulation leaving 3/8 in. (9.5mm) bare wire ends and clean off any
ensure proper installation. When finished, hang the top of the unit by the tabs at
6:00 AM 70 °F (21 °C)
6:00 AM 78 °F (26 °C)
the top corners of the base, then snap the bottom of the unit into place. Do not use
2. Fill wall opening with non-combustible insulation to prevent drafts from
unnecessary force. If the body does not snap into place easily, remove the body, re-
8:00 AM 62 °F (17 °C)
8:00 AM 85 °F (29 °C)
affecting the thermostat.
hang it from the tabs and try again.
6:00 PM 70 °F (21 °C)
6:00 PM 78 °F (26 °C)
10:00 PM 62 °F (17 °C)
10:00 PM 82 °F (28 °C)
Be careful not to drop the unit or disturb electronic parts. Leave the door closed
while the body is being removed from the base.
MINIMUM RUN TIME DELAY
If you have any problems installing or using this thermostat, please carefully and
3. Remove the body from the thermostat's base by pressing the thumb latch at the
This is determined by the thermostat, and controls the minimum length of time that
thoroughly review the instruction manual. If you require assistance, please contact
bottom center of the unit and swinging the body away.
the thermostat must remain with Heat or Cool either On or Off, before it will
our Technical Assistance department at 856-234-8803 during regular business
automatically switch to the alternate On or Off state. This feature prevents rapid or
hours between 8:00AM and 4:30PM Eastern Standard Time, Monday through
short cycling, and provides compressor protection for cooling equipment. The time
Friday. You can also receive technical assistance online anytime day or night at
If you are mounting the base to soft material like plasterboard or if you are using
amount for this delay is fixed at 5 minutes between on or off load changes.
http://www.luxproducts.com. Our web site offers you answers to the most common
the old mounting holes, the screws may not hold. Drill a 3/16 in. (4.8mm) hole at
technical questions, and also permits you to email your questions to our technical
each screw, and insert the plastic anchors provided.
support staff at your convenience.
A Temperature Override occurs in Run mode, in either Heat or Cool, anytime the
4. Hold the base against the wall. Route the wires through the hole below the
user adjusts the set temperature to a value that differs from the stored program
terminal block. Position the base for best appearance (to hide any marks from an
temperature for that day and time. When the thermostat is in an Override, the word
old thermostat). Attach the base to the wall with the two screws provided.
Override will appear in the temperature area of the display. The thermostat will
maintain thermal control using this new set temperature, until the start of the next
Limited Warranty: If this unit fails because of defects in materials or workmanship
CONNECTING THE WIRES
program period time is reached. At the start of the next program period, the set
within three years of the date of original purchase, LUX Products Corporation will,
5. Wires must be trapped between the black clamps and the brass
temperature will return to its programmed value. To enter an Override in either Heat
at its option, repair or replace it. This warranty does not cover damage by accident,
terminals as shown here.
or Cool mode, push either the UP or DOWN button once and the set temperature
misuse, or failure to follow installation instructions. Implied warranties are limited
will begin to flash. Push either the UP or DOWN button to the new desired set
6. Being careful not to overighten them, securely tighten all of the
in duration to three years from date of original purchase. Some states do not allow
temperature value. An Override may be cancelled by rotating the dial, changing the
electrical terminal screws, including any unused ones.
limitations on how long an implied warranty lasts, so the above limitation may not
Temperature mode switch, or by initiating a Temperature Hold.
apply to you. Please return malfunctioning or defective units to the participating
retailer from which purchase was made, along with proof of purchase. Please refer
When you are finished performing your installation and setup options, please
to the "TECHNICAL ASSISTANCE" section before returning thermostat. Purchaser
A Temperature Hold is similar to an override, but is used for maintaining a constant
remove the thin plastic film that is protecting the LCD display screen on the front of
assumes all risks and liability for incidental and consequential damage resulting
set temperature for a longer time duration. Once a Hold is initiated, the thermostat
the thermostat. This plastic may or may not be present, and is evident by the
from installation and use of this unit. Some states do not allow the exclusion of
will maintain the Hold set temperature indefinitely. A temperature hold may be used
appearance of fake digits appearing on the display screen.
incidental or consequential damages, so the above exclusion may not apply to you.
for days, weeks, or even months at a time. To enter a Hold, push the HOLD button
This warranty gives you specific legal rights and you may also have other rights
once, and the word Hold will appear in the temperature portion of the screen, along
which vary from state to state. Applicable in the U.S.A. only.
with the set temperature flashing. While the set temperature is flashing, push either
the UP or DOWN button to the new desired set temperature value. To cancel a Hold,
press and release the HOLD button once again, rotate the dial, or change the
** Complete heating and/or cooling system wiring can be found in the WIRE
Temperature mode switch.
IDENTIFICATION AND WIRING SCHMATICS section of this instruction sheet. The
schmatics shown provide component information for brand new installations or
for unreferenced wires.
© 2 0 0 6 L U X P R O D U C T S C O R P O R A T I O N . A L L R I G H T S R E S E R V E D