Lux Products P721UTa Thermostat User Manual

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P721UTa  
SMART TEMP® UNIVERSAL  
7-DAY PROGRAMMABLE TOUCHSCREEN THERMOSTAT  
(FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS)  
INSTALLATION AND OPERATING INSTRUCTIONS  
52139  
IMPORTANT!  
• Please read all of these instructions carefully before beginning  
installation.  
• Label every wire terminal designation on your existing thermostat wiring  
before removing your old thermostat.  
• Ignore the color of the wires since they may not comply with any  
standard. Please connect wires using the terminal letter designations.  
Thank you for your confidence in our product. To obtain the best results from  
your investment, please read and follow the installation procedures carefully, and  
one step at a time. This will save you time and minimize the chance of damaging  
either the thermostat or possibly your heating and cooling system. These  
instructions may contain information beyond that which may be required for your  
particular installation.  
CAUTIONS AND WARNINGS . . . . . . . . . . 2  
SYSTEM COMPATIBILITY . . . . . . . . . . . . 3  
FEATURES . . . . . . . . . . . . . . . . . . . . . . . 4  
TOOLS YOU MAY NEED . . . . . . . . . . . . . . 4  
MOUNTING LOCATION . . . . . . . . . . . . . . 5  
REMOVE OLD THERMOSTAT . . . . . . . . . . 5  
INSTALL THERMOSTAT BASE . . . . . . . . . 6  
WIRING INFORMATION . . . . . . . . . . . . . . 7  
WIRING DIAGRAMS . . . . . . . . . . . . . . . . 9  
HARDWARE SETUP OPTIONS . . . . . . . . 18  
COMPLETE THE INSTALL . . . . . . . . . . . 20  
FRONT PANEL ITEMS . . . . . . . . . . . . . . 20  
OPERATING INSTRUCTIONS . . . . . . . . . 21  
TEMPERATURE PROGRAMS . . . . . . . . . 24  
ADVANCED FEATURES . . . . . . . . . . . . . 25  
BATTERY REPLACEMENT . . . . . . . . . . . 33  
TECHNICAL ASSISTANCE . . . . . . . . . . . 34  
LIMITED WARRANTY . . . . . . . . . . . . . . 34  
MERCURY NOTICE . . . . . . . . . . . . . . . . 34  
WARNING: Use Energizer® or DURACELL® Alkaline Batteries Only.  
Energizer® is a registered trademark of Eveready Battery Company, Inc.  
DURACELL® is a registered trademark of The Procter & Gamble Company  
© 2013 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED  
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CAUTIONS AND WARNINGS:  
• This thermostat requires batteries to operate and failure or sub-standard  
performance of the batteries may impair or prevent the correct operation of  
the thermostat. Use Duracell® or Energizer® alkaline batteries ONLY for all  
LUXPRO thermostats requiring batteries. BE SURE TO CHANGE THE BATTERIES  
AT LEAST ONCE A YEAR, or whenever you see the LO BATT indication on the  
screen. Failure to follow these battery instructions could result in property  
damage and/or personal injury.  
• The electrical rating for this thermostat is 1.5 Amps per terminal, with a  
maximum total load of 3.0A for all terminals combined.  
• The thermostat contains parts that may wear out through use and are  
susceptible to failure if over-loaded or used in a manner other than as  
indicated in the documentation.  
• Check unoccupied residences regularly to ensure that all systems are  
operating properly.  
• Check any heating/air-conditioning system including this product before  
operation and at regular intervals.  
• Electrical interference, static electricity, failure or substandard performance of  
batteries, wiring defects in the installation and/or characteristics of the  
connected HVAC devices may prevent the system from regulating heating and  
cooling as anticipated.  
• The thermostat is a sensitive device and dropping the product can cause  
damage to critical components. If the product is dropped or shaken violently  
during transport or installation then it should be replaced immediately.  
• Persons with physical or mental limitations may not be able to promptly  
respond to a malfunction of the heating/air-conditioning system.  
• All residents should be made aware of the potential in any system for  
malfunctions that could cause continuous heating or cooling and should be  
familiar with the operation and location of the heating/cooling appliance on/off  
switch.  
• Read the instruction manual completely before installing the thermostat. You  
should consult a qualified HVAC technician or an electrician if you do not fully  
understand the installation instructions.  
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P721UTa  
Fan  
Mode  
Switch  
Menu  
Button  
FAN  
AUTO  
ON  
MENU  
˚
F
PM  
˚
F
SET  
HEAT  
OFF  
Clock  
COOL  
System  
Mode  
Switch  
Room Temperature  
Set Temperature  
SYSTEM COMPATIBILITY:  
The electrical rating for this thermostat is 1.5 Amps per terminal, with a  
maximum total combined load of 3.0A for all terminals combined.  
COMPATIBLE WITH:  
• Most 24-volt heating and cooling systems  
• 1 or 2 stage Heat / 1 stage Cool: Gas, Oil or Electric systems  
• 1 or 2 stage Heat / 1 stage Cool: Heat Pump systems  
• 3-wire hydronic (hot water) zone valves  
• Gas Millivolt heaters  
NOT COMPATIBLE WITH:  
• 120/240 VAC line-voltage systems (without a transformer), ask your LUXPRO  
dealer for thermostats to control these systems.  
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FEATURES:  
• 1 or 2-Heat / 1-Cool, 7-day programming  
• Universal Compatibility for all system types  
• Each day of the week can be programmed separately  
• Easy to use, touchscreen menu operation  
• User-selectable periods per day (2 or 4)  
• User-selectable programmable or non-programmable operation  
• LuxLight® EL (Electro-Luminescent) lighted display  
• Energy usage monitor  
• Programmable air filter life timer  
• Programmable keypad lockout for unauthorized users  
• Manual temperature hold  
• Adjustable vacation hold (1 to 30 days)  
• Temporary temperature override  
• Adjustable temperature differential / cycle-rate  
• Adjustable 2nd heat stage Offset setting  
• User temperature calibration  
• Adjustable heat/cool set temperature limit stops  
• Smart recovery  
• Dual-powered (battery and/or 24-volt system powered)  
• Battery-free memory storage  
• F/C temperature display  
• 12/24-hour clock display  
• 5/2-minute selectable time delay for equipment protection  
TOOLS YOU MAY NEED:  
• Screwdrivers  
• Wire Stripper  
• Wire Cutter  
• Drill with assorted drill bits (new installations only)  
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MOUNTING LOCATION:  
On replacement installations, mount the new thermostat in place of the old one  
unless the conditions listed below suggest otherwise. On new installations,  
please follow these general guidelines:  
1. Mount the thermostat on an inside wall, about 5 ft. (1.5m) above the floor.  
2. Do not locate the thermostat where air circulation is poor such as in a corner,  
alcove, or behind a door that is normally left open.  
3. Do not locate the thermostat where unusual heating or cooling conditions may  
be present, such as: direct sunlight, above a lamp, television, or radiator, or on  
a wall next to an exterior door or window.  
4. Do not locate in a damp environment, as this can lead to corrosion that may  
shorten thermostat life.  
5. If painting or construction work is still ongoing, cover the thermostat  
completely or wait until this work is complete before installation.  
WARNING:  
All wiring must conform to the local codes and ordinances that are in your  
particular location.  
REMOVE OLD THERMOSTAT:  
1. Turn OFF the electricity to all heating and cooling  
components. Do not turn the electricity back on until  
all work is completed.  
2. Remove the front portion of your old thermostat to  
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expose the wiring connections.  
3. Write down the letters printed near each wire terminal  
that is used, and also the color of each wire that is  
connected to it. Self-adhesive wire labels are also  
enclosed.  
4. Carefully remove the wires one at a time, and bend them in a manner so that  
they do not fall back inside the wall. Do not allow bare wire ends to touch  
each other.  
5. Loosen the mounting screws for the old thermostat and carefully remove it  
from the wall.  
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INSTALL THERMOSTAT BASE:  
Mode  
Switches  
THERMOSTAT TOP VIEW  
1. Strip wire insulation leaving only 3/8 in. (9.5mm) bare wire ends, and clean off  
any corrosion present.  
2. Fill the wall opening with non-combustible insulation to prevent drafts from  
affecting the thermostat’s normal operation.  
3. Separate new thermostat housing using your thumb and index finger. Provide  
pressure in opposite directions to the release tabs on the top of the housing,  
in the directions shown in the diagram shown above.  
4. Route the wires through the opening in the new thermostat base plate, and  
hold the base against the wall. Try to line up the screw holes from the prior  
thermostat, and install the mounting screws.  
5. If the previous holes cannot be used, hold the thermostat base against the  
wall so that it appears straight and level (position the base for best  
appearance) and mark for the new screw holes. Attach the base to the wall  
using the screws provided (use the supplied plastic anchors if needed when  
mounting to a soft material such as drywall).  
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WIRING INFORMATION:  
CONNECTING THE WIRES:  
When attaching the wires to the thermostat, please ensure that the bare wire  
ends are held ALL the way into the terminal block while the screw is being  
tightened.  
WIRING BASE PLATE NOTICE:  
This thermostat model is part of a family of similar models that have the same  
general visual appearance. Even though this base plate may look the same as  
base plates from other models, the wiring connections may have different  
terminal letters for different purposes. Please do not interchange the back plates  
and/or thermostat front halves of other similar looking models. Doing so may  
cause undesired heating and/or cooling operation to occur.  
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WIRING DIAGRAM NOTES:  
(Important, please read all notes before connecting wires)  
• If the information provided in the following wiring diagrams does not clearly  
represent or match your system, please refer to the “TECHNICAL ASSISTANCE”  
section of this manual, and contact us before removing any of your existing  
thermostat wiring.  
• All of the dashed wires shown in the wiring diagrams are either optional, or  
their usage depends upon your specific system type or brand. For example:  
Diagram #1 shows the fan wire as optional. If your system does not have a  
fan, than this terminal will not be used.  
• Terminal letters shown in black represent typical wiring applications.  
Depending upon the brand of your specific system or thermostat, your terminal  
letters may not match exactly. Terminal letters shown in gray represent other  
possible wiring designations that you might see on your existing thermostat  
terminals.  
• The optional “C” terminal is used for powering the thermostat by the 24-volt  
system, using the System Common wire. This can be used alone, or in  
addition to installing batteries as a backup. NOTE: connecting the System  
Common wire to the thermostat is not necessary for heating and cooling to  
function properly.  
• If your old thermostat has both a “Y” and “C” wire present, then “C” is most  
likely a System Common wire.  
• For Heat Pump systems, you will use either the “O” terminal or the “B”  
terminal on this thermostat, but not both. If your old thermostat has both an  
“O” and a “B” wire present, then “B” is likely a System Common wire and may  
be connected to the “C” terminal. Connecting a System Common wire to this  
thermostat’s “B” terminal may damage the thermostat, and also your heating  
and cooling system.  
• Some Heat Pump systems have a wire for AUX electric heat (usually W2), and  
also a separate wire for Emergency electric heat (usually E). This thermostat  
uses the W2 terminal for both AUX and Emergency Heat. Tape off your “E”  
wire, and confirm that all components function without it.  
• If replacing an old thermostat that has a mechanical clock, there may be two  
wires labeled as “C” for the clock power. Tape off these wires and do not  
connect them to the “C” terminal of this thermostat.  
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WIRING DIAGRAMS:  
DIAGRAM  
SYSTEM TYPE / DESCRIPTION  
PAGE #  
#1  
#2  
#3  
#4  
#5  
#6  
#7  
#8  
CONVENTIONAL:  
CONVENTIONAL:  
CONVENTIONAL:  
CONVENTIONAL:  
CONVENTIONAL:  
CONVENTIONAL:  
HEAT PUMP:  
HEATING ..........................................................10  
1-STAGE OR 2-STAGE  
2, 3, 4, 5 WIRES  
HEATING ..........................................................11  
3-WIRE ZONE VALVE  
3, 4 WIRES  
COOLING ..........................................................12  
1-STAGE  
3, 4 WIRES  
HEATING AND COOLING .....................................13  
1-STAGE HEAT  
4, 5 WIRES  
HEATING AND COOLING .....................................14  
2-STAGE HEAT  
5, 6 WIRES  
HEATING AND COOLING .....................................15  
TWO-TRANSFORMERS  
5, 6 WIRES  
HEATING AND COOLING .....................................16  
SINGLE-STAGE ONLY  
4, 5 WIRES  
HEAT PUMP:  
HEATING AND COOLING .....................................17  
WITH AUX / EMERGENCY HEAT  
5, 6 WIRES  
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HARDWARE SETUP OPTIONS:  
On the thermostat’s circuit board, there is a row of DIP switches, labeled #1  
through #7. The position of these switches will change how the thermostat  
operates, and also how information is conveyed to you on the LCD display  
screen. If you make any changes to these options, the changes are not  
recognized unless you either: change the position  
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of the HEAT/OFF/COOL mode switch, or press the  
“HW RST” (Hardware Reset) button on the circuit  
board. The use of this button is further described  
in the “ADVANCED FEATURES” section of this  
manual.  
These option switches are very small and should  
be moved carefully using objects such as: eyeglass  
screwdriver, fine-point pen, toothpick, or similar.  
The listing below describes the available choices  
for each option switch:  
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SWITCH #1 (SYSTEM): [OFF/RIGHT = FURN, default] This setting is used for the  
majority of all heating systems that are not heat pumps. Examples for this  
setting would be: natural gas furnace, hot water baseboard heat, and oil heat.  
[ON/LEFT = HP] Use this setting if you have a heat pump unit (which looks just  
like an outside air conditioning unit, but is used for both cooing and heating).  
SWITCH #2 (TYPE): [OFF/RIGHT = PROG, default] The thermostat controls the  
room temperature by following temperature program periods that you set up  
based upon your daily routine. [ON/LEFT = MAN] The thermostat operates  
manually just like a mechanical or non-programmable model. This method of  
operation is very basic and only shows the room temperature and set  
temperature; there are no temperature programs, days of the week, or clock  
times.  
SWITCH #3 (PERIODS): [OFF/RIGHT = 4, default] The thermostat uses four  
temperature program periods in both heating and cooling (MORN, DAY, EVE, and  
NITE). Each period has a separate start time and a set temperature. [ON/LEFT =  
2] The thermostat operates in the same manner as above, however there are only  
two temperature program periods for heating and cooling (DAY and NITE). This  
may be more convenient if you are typically home during the day, and only need  
the set temperature to be different while you are sleeping.  
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SWITCH #4 (SCALE): [OFF/RIGHT = F, default] All temperature values are  
displayed using the Fahrenheit scale. [ON/LEFT = C] This setting displays all  
temperature values using the Celsius scale.  
SWITCH #5 (TIME): [OFF/RIGHT = 12 HR, default] This setting displays the clock  
times and temperature program period start time values on the screen using US  
standard AM and PM values. [ON/LEFT = 24 HR] This setting displays the clock  
and temperature program period start time values on the screen using the 24 HR  
military-time format (17:30 hours, 22:00 hours, without using AM/PM).  
SWITCH #6 (DELAY): [OFF/RIGHT = 5 MIN, default] This sets the minimum length  
of time that Heat or Cool must remain either On or Off, before it will  
automatically switch to the alternate On or Off state. This internal delay prevents  
rapid cycling of your system and provides equipment protection particularly for  
cooling units. The 5-minute setting is fine for most applications. [ON/LEFT = 2  
MIN] If you feel that your system may need to cycle more frequently than the  
thermostat is allowing, then you may use the 2-minute setting.  
SWITCH #7 (RECOVERY): [OFF/RIGHT = DISABLE, default] The Early Recovery  
feature affects how the thermostat transitions from an energy saving setback  
(DAY and NITE) program period, to a comfort (MORN and EVE) program period  
temperature, when it is following the daily temperature programs. When this is  
disabled, the thermostat makes a set temperature change at the beginning of an  
upcoming period's start time. [ON/LEFT = ENABLE] The Early Recovery feature  
will calculate the capability of your system and turn on the heating or cooling  
early so that the temperature in your home reaches the desired set point as close  
as possible to the start of the period. During the time that the thermostat is  
performing a recovery, the words “IN RECOVERY” will be shown, alternating at  
the top of the display with the current system mode.  
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GAS / ELEC SLIDE SWITCH (FAN OPERATION):  
This switch is a physical component by itself on the  
circuit board, and is much larger than the DIP  
switches listed above.  
BATTERY  
[UP = GAS, default] This setting lets the heating  
system control the blower fan automatically by  
itself. Systems that would typically use the “GAS”  
setting would be: natural gas, propane, or oil  
furnaces. This setting has no effect upon Cool  
mode operation.  
GAS  
ELEC  
[DOWN = ELEC/HP] This setting runs the system’s blower fan when heat is called  
for, and is required for heating systems that do not control their own fan while  
the thermostat is in HEAT mode. Heat pump systems, and units with an electric  
heating element typically require this setting.  
COMPLETE THE INSTALL:  
Once the hardware options are set, install two new Energizer® or DURACELL®  
"AA" size alkaline batteries. Ensure that the batteries are installed in the proper  
direction as per the markings shown in the battery tray. If the batteries were  
already installed before changing the hardware setup options, change the  
position of the HEAT/OFF/COOL System Mode switch to accept the new hardware  
option switch settings.  
FRONT PANEL ITEMS:  
These two items below are both located on the right side of the thermostat  
housing.  
HEAT / OFF / COOL, SYSTEM MODE SWITCH: Set this switch to HEAT to control  
your heating system, and COOL to control your cooling system. The OFF position  
will disable both the heating and cooling units.  
AUTO / ON, FAN MODE SWITCH: When this switch is in AUTO, the blower fan (if  
present in your system) will automatically cycle on and off by itself while heating  
or cooling is running. When in the ON position, the blower fan will run constantly  
with or without a demand for heating or cooling, even when the System Mode  
switch is in the OFF position.  
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NOTE: The Fan Mode switch only works if your system provides a wire for the  
thermostat’s “G” wire terminal, to control a blower fan. The Fan Mode switch  
has no effect in systems that do not have a blower fan (such as a hot water  
radiator system).  
OPERATING INSTRUCTIONS:  
TOUCHSCREEN MENU CONTENTS:  
• SET DAY/TIME  
• SET/REVIEW “HEAT/COOL” PROGRAMS (not present in OFF mode)  
• SET/REVIEW FILTER USAGE  
• REVIEW “HEAT/COOL” ENERGY USAGE (not present in OFF mode)  
• SET/REVIEW SWING VALUE  
• SET KEYBOARD LOCK CODE (not present in OFF mode)  
• SET “HEAT/COOL” TEMPERATURE STOP (not present in OFF mode)  
• TEMPERATURE SETBACK (not present in OFF mode)  
SET DAY AND TIME: Press the MENU button. The first menu item shown is “SET  
DAY/TIME”, press the OK button. With the day flashing, press UP or DOWN to set  
the day of the week. Press NEXT and the clock time will start flashing. Use UP  
or DOWN to set the time, making sure the AM/PM indication is correct. Holding  
the UP or DOWN buttons will make the clock digits scroll rapidly. Press the EXIT  
button to return to the Normal Run screen.  
HEATING AND COOLING: Basic operation of your heating or cooling system can  
be obtained by choosing either HEAT or COOL on the System Mode switch. Touch  
the Set Temperature digits on the screen and they will begin to flash. While they  
are flashing, the UP and DOWN buttons will be shown also, which you can use to  
adjust the current Set Temperature. When the thermostat is first powered up, it  
will follow a default temperature routine that is preset from the factory (shown  
below), until the clock has been set.  
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PERIOD  
HEAT MODE  
COOL MODE  
MORN 6:00 AM 70 °F (21 °C) 6:00 AM 78 °F (26 °C)  
DAY  
EVE  
8:00 AM 62 °F (17 °C) 8:00 AM 82 °F (28 °C)  
6:00 PM 70 °F (21 °C) 6:00 PM 78 °F (26 °C)  
NITE 10:00 PM 62 °F (17 °C) 10:00 PM 75 °F (24 °C)  
There are on-screen indicators to show you when the thermostat is calling for  
heating or cooling to occur. In the Heat mode switch position, a flame will be  
present on the screen. A steady flame means that the thermostat is not calling  
for your heating system to run, while a flashing flame means that your heating  
system should be currently running. In the Cool mode switch position, a  
snowflake will be present on the screen. A steady snowflake means that the  
thermostat is not calling for your cooling system to run, while a flashing  
snowflake means that your cooling system should be currently running.  
EMERGENCY HEAT: (Heat Pump Configuration Only).  
While in normal Heat mode, one single press of the  
EMER button will activate Emergency Heat mode.  
While in Emergency Heat, the top of the screen will  
change from “Heat Mode” to show “Emer Heat”, and  
EMER. = ON  
an additional bold frame will appear around the EMER  
button. A single press of the EMER button again will  
end Emergency Heat, and return back to normal Heat  
mode. If a power loss occurs while in Emergency Heat  
mode, the thermostat will continue to remain in  
EMER. = OFF  
Emergency Heat mode even after the power comes  
back on.  
Emergency Heat mode will prevent the first stage of your heat pump system from  
turning on, and use only the “W2” heat terminal (Auxiliary Heat) as the primary  
heating source. This will not only prevent the heat pump from wasting energy if  
outdoor temperatures are too low to support efficient operation, but it could also  
prevent damage to the heat pump if outside temperatures are below the  
manufacturer’s recommendations. As every heat pump has different operating  
characteristics, you should refer to your heat pump literature to determine when  
to disable the heat pump and run in Emergency Heat mode.  
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LCD DISPLAY BACKLIGHT: The display screen is lighted to assist viewing at  
nighttime, or in locations with low light levels. A press of any area on the touch  
panel will light the display for approximately 10 seconds. Any screen presses  
that occur while the light is on will reset the 10-second timer, causing the screen  
to remain illuminated for an additional 10 seconds.  
TEMPERATURE OVERRIDE: While in the Normal Run screen, the set temperature  
can be temporarily changed by pressing the Set Temperature digits, then  
pressing the UP or DOWN buttons. The set temperature will return to the  
programmed value stored in memory when the start time of the next upcoming  
program period is reached (Morn, Day, Eve, Nite). While a Temporary Override is  
in effect, the words “HEAT OVRRIDE” or “COOL OVRRIDE” will be shown in the  
display screen. An Override may be cancelled by either pressing the HOLD  
button two times, or by moving the mode switch to OFF, pausing briefly, then  
switching back to the HEAT or COOL position. When in the Normal Run mode, the  
display should say either “HEAT MODE” or “COOL MODE”.  
MINIMUM RUN TIME: The thermostat has a default internal time delay of 5  
minutes between load-on and load-off activations to prevent heating or cooling  
system damage, which can occur from very frequent cycling. If heating or  
cooling does not turn on right away with a manual change in set temperature,  
please wait at least 5 minutes and the system should resume normal operation.  
TEMPERATURE HOLD: A Temperature Hold is used for  
maintaining a fixed set temperature. Once a Hold is  
initiated, the thermostat will maintain the set  
temperature indefinitely. A Hold may be used for  
days, weeks, or even months at a time, as long as the  
HOLD = ON  
thermostat has adequate power. To enter Hold mode:  
press the HOLD button one time and the words “HEAT  
HOLD” or “COOL HOLD” will appear in the display, and  
an additional bold frame will appear around the HOLD  
button. To cancel a Hold, press the HOLD button one  
HOLD = OFF  
more time. If a mains power failure occurs during a  
Temperature Hold, the thermostat will continue to  
remain in Hold mode even after the power comes back on.  
NOTE: If you plan to leave the thermostat in Hold mode for an extended duration  
(unattended), it is advisable to install new Energizer® or DURACELL® "AA" size  
alkaline batteries prior to leaving to ensure reliable operation of your heating and  
cooling system.  
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STATIC NOTICE: This thermostat is protected against normal static electric  
discharges, however to minimize the risk of damaging the unit in extremely dry  
weather, please touch a grounded metal object before touching your thermostat.  
TEMPERATURE PROGRAMS:  
By default, this thermostat has 4 separate program periods for both Heat and  
Cool mode, they are: MORN, DAY, EVE, and NITE. Each period ends at the start  
time of the following period. The heat programs are set in HEAT mode, and the  
cool programs are set in COOL mode.  
NOTE: If the thermostat is configured to use only 2 periods per day instead of 4  
(HARDWARE SETUP OPTIONS), the thermostat will only use the DAY and NITE  
periods. The MORN and EVE periods will not be visible on the screen.  
The following examples are shown using Heat mode. Programming in Cool mode  
is done in the same exact manner with the System Mode switch in the Cool  
position.  
SET TEMPERATURE PROGRAMS: Press the MENU button, then press the SCROLL  
button until “SET/REVIEW HEAT PROGMS” is shown, then press the OK button to  
enter the programming screen. Use the UP and DOWN buttons to adjust the start  
time for the MORN period, then press the NEXT button to advance. Use the UP  
and DOWN buttons to adjust the set temperature for the MORN period, then press  
the NEXT button to advance. Now adjust the start time and set temperature for  
the DAY period, pressing the NEXT button after each to advance. Continue with  
these same steps to adjust the start times and set temperatures for the EVE and  
NITE program periods.  
When the NITE period is finished the thermostat will advance to Tuesday, with the  
MORN period start time flashing. Perform the same steps that you used for  
setting the Monday periods, pressing the NEXT button to advance through each  
flashing value.  
PROGRAM COPY FEATURE: The Copy feature allows you to copy all of the  
program information from any one single day, to any other day of the week. To  
copy heat programs, the thermostat must be in Heat mode, and to copy cool  
programs, the thermostat must be in Cool mode. Emergency Heat (heat pump  
configurations only) uses the Heat temperature program. While in a temperature  
programming screen, press the “COPY” button one time. The words “COPY  
PROGRAM” will flash briefly at the top of the screen, followed by “FROM” and  
“TO”. Under the word “FROM” will be a flashing day of the week. Using the UP  
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and DOWN buttons, select the day that you want to copy from. Press the NEXT  
button one time. Your copy from day should now be on steady with the day under  
the word “TO” flashing. Use the UP and DOWN buttons to select the day that you  
would like to copy to. A single short press of the COPY button will perform the  
copy, and the day flashing under the word “TO” will have advanced to the next  
following day. You may continue to perform short single presses of the COPY  
button to keep copying from the original source day to the remaining days, one  
after the other. Specific days may be skipped by pressing the UP button, to  
advance past them while they are flashing under the word “TO”. Press the EXIT  
button to return to the Normal Run screen.  
ADVANCED FEATURES:  
TEMPERATURE SWING SETTING, OFFSET SETTING, AND TEMPERATURE  
CALIBRATION:  
NOTE: The Swing setting, Offset setting, and Calibration settings need to be  
performed in a timely manner, as the thermostat will timeout and automatically  
exit these adjustment screens after approximately 10 seconds without a button  
press.  
SWING DESCRIPTION: A thermostat works by turning your heating or cooling  
system on and off whenever the room temperature varies from the desired set-  
point temperature. The amount of this variation is called the Swing. Generally  
your system should cycle on about 3 to 6 times per hour. A smaller swing  
number makes the system cycle more frequently, so the room temperature is  
more precise and constant. A larger swing number will make the system remain  
on for a longer duration each time and decreases the number of cycles per hour.  
There is only one Swing setting, and this determines the cut-in and cut-out  
points for both the first and second stages (if present), in both Heat mode and  
Cool mode. The swing setting range is between #1 and #9 (0.25°F to 2.25°F, in  
0.25°F degree increments (or 0.14°C to 1.25°C, in 0.14°C degree increments for  
Celsius)). Swing number 1 is the default setting.  
OFFSET DESCRIPTION: This setting is shown as a number of degrees, and is  
similar in nature to the Swing however this only effects the operation of the  
second (auxiliary) heating stage, if present. The setting range for Offset is from  
0°F to 9°F degrees (0°C to 5°C degrees). When set to 0 degrees, the second  
heating stage is completely disabled while in regular Heat mode (Emergency Heat  
mode will still function for heat pump configurations). The Offset value will  
determine the number of degrees from the set point that will be required for the  
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second heating stage to turn on. This setting can be used to conserve energy in  
situations where the second heating stage is more costly to operate when  
compared to the first stage.  
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70  
69  
68  
67  
66  
Cut-In / Cut-Out  
(1st Stage)  
70˚F Set  
Temperature  
Swing  
Setting=  
#2 (+/- 0.5˚F)  
Offset **  
Setting=  
4˚F degrees  
(2nd Stage) **  
Cut-In / Cut-Out  
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DEGREES (F)  
** = Only applies if a second  
heat stage is present  
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TEMPERATURE CALIBRATION DESCRIPTION: The internal temperature sensor in  
this thermostat is accurately calibrated at the factory, and in most cases,  
alterations to this setting should not be needed. The Temperature Calibration  
feature allows you to manually offset the 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 or synchronize this thermostat to another one or more, if multiple  
thermostats are used in the same home.  
TO CHANGE THE SWING, OFFSET, AND CALIBRATION: Press the MENU button, then  
press the SCROLL button until “SET/REVIEW SWING VALUE” is shown on the  
screen, then press the OK button. The words “ADJUST VALUE SWING” will appear  
at the top of the screen, along with a single flashing digit. Use the UP and DOWN  
buttons to change the number value from #1 to #9. Press the NEXT button to  
accept the Swing setting and proceed to the Offset setting.  
After the Swing value has been accepted, the words “ADJUST VALUE OFFSET” will  
appear at the top of the screen, along with a single flashing temperature digit.  
Use the UP and DOWN buttons to change the number value between 0°F and 9°F  
degrees (0°C to 5°C). The 0° (zero) degree setting will disable the 2nd heating  
stage while in regular Heat mode. Press the NEXT button to accept the Offset  
setting and proceed to the Calibration setting.  
After the Offset value has been accepted, the words “ADJUST VALUE CALwill  
appear at the top of the screen, along with a single flashing temperature digit.  
Use the UP and DOWN buttons to change the number value between –5°F and  
+5°F (–3°C and +3°C). The 0° (zero) degree setting is the default value, and will  
not alter the displayed room temperature from the measured reading. Press the  
NEXT button to accept the Calibration setting and return back to the Swing  
setting. You can keep pressing the NEXT button to review your three setting  
values, or press the EXIT button to return to the Normal Run screen.  
SETBACK FEATURE: The setback feature is similar to both a Temperature  
Override and a Temperature Hold, in that both are used to maintain a fixed set  
temperature instead of following a programmed daily routine. A Setback can be  
considered the same as a Temperature Override, which can last for a longer  
duration that you can adjust from 1-12 hours, or 1-30 days. By default, when a  
Setback is activated in Heat mode, the set temperature used will be 5F (3C)  
degrees lower than the current set temp. For Cool mode, the set temperature  
used will be 5F (3C) degrees higher than the current set temp.  
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NOTE: The Setback settings need to be performed in a timely manner, as the  
thermostat will timeout and automatically exit these adjustment screens after  
approximately 10 seconds without a button press.  
TO START A SETBACK: Press the MENU button, then press the SCROLL button  
until “TEMPERATURE SETBACK” is shown, then press the OK button. The words  
“OVERRIDE LEFT” will appear at the top of the screen, along with two digits and  
the word “HRS”. Use the UP and DOWN buttons to set the duration for how long  
you would like to maintain a fixed set temperature (from 1 to 12 hours). If you  
would like to set the duration for longer than 12 hours, keep pressing the UP  
button. The display will change from “HRS” left to “DAYS” left, with an available  
duration of 1 to 30 days. Once you have selected your desired Setback duration,  
press the NEXT button to advance. The display will change from “OVERRIDE  
LEFT” left to “OVERRIDE TEMPERATURE”. Use the UP and DOWN buttons to select  
your desired Set Temperature that will be used during the Setback duration.  
Once complete, press the NEXT button to accept the setting and return to the  
Normal Run screen.  
TO CANCEL A SETBACK: A Setback can be cancelled by either pressing the HOLD  
button two times, or by moving the mode switch to OFF, pausing briefly, then  
switching back to the HEAT or COOL position. When in the Normal Run mode, the  
display should say either “HEAT MODE” or “COOL MODE”.  
TEMPERATURE LIMIT STOPS: There are two independent set temperature limit  
stops: a maximum heat set temperature, and a minimum cool set temperature.  
These stops do not prevent a user from performing normal actions like  
Temperature Override or Hold. The Heat Limit Stop prevents the set temperature  
from being adjusted higher than the heat limit setting. The Cool Limit Stop  
prevents the set temperature from being adjusted lower than the cool limit  
setting. Each of these temperature stops is user adjustable in one-degree  
increments, and these settings are protected by a selectable 2-digit code to  
prevent unauthorized tampering. By default, this 2-digit code is “00”, and the  
temperature stops can be used as-is with this code.  
NOTE: The Temperature Limit Stop settings need to be performed in a timely  
manner, as the thermostat will timeout and automatically exit the setting screens  
after approximately 10 seconds without a button press.  
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The following examples are shown for setting the maximum set temperature for  
Heat mode. Setting the Temperature Limit Stop for Cool mode is done in the  
same exact manner with the System Mode switch in the Cool position, and  
instead you will be setting the minimum set temperature for cooling. Once a  
Temp Stop Lock Code has been selected, this same code is used for both Heat  
and Cool temp stops.  
TO SET THE TEMPERATURE LIMIT STOP: Press the MENU button, then press the  
SCROLL button until “SET HEAT TEMP STOP” is shown, then press the OK button.  
The words “ENTER CODE” and “TEMP STOP” will appear at the top of the screen,  
along with two digits at the left. Use the UP and DOWN buttons to enter the  
current Temp Stop Lock Code (“00” by default). Press the NEXT button to  
advance. If the code entered does not match the current Temp Stop Lock Code,  
the words “WRONG CODE” will flash briefly, and you may try to enter the correct  
code again. If the current code has been entered correctly, you will have the  
ability to change the desired Temp Stop Lock Code to something else. The words  
“SET CODE” and “TEMP STOP” will appear at the top of the screen, along with  
two digits at the left. Use the UP and DOWN buttons to enter the desired Temp  
Stop Lock Code to be used, and press the NEXT button to advance.  
The words “SET HEAT RANGE STOP” will appear at the top of the screen, along  
with two large temperature digits in the middle. Use the UP and DOWN buttons  
to adjust the desired maximum heat set temperature value (or minimum set  
temperature value for Cool mode). Once complete, press the NEXT button to  
accept the setting and return to the Normal Run screen.  
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KEYPAD LOCKOUT: You can lock the touch-panel buttons to prevent unauthorized  
tampering of your thermostat settings.  
NOTE: These keypad lock instructions need to be performed in a timely manner,  
as the thermostat will timeout and automatically exit the keypad lock screens  
and return to the Normal Run screen after approximately 10 seconds without a  
button press.  
TO LOCK THE KEYPAD: The System Mode switch must be in either the Heat or  
Cool position. Press the MENU button, then press the SCROLL button until “SET  
KEYBOARD LOCK CODE” is shown, then press the OK button. The words “ENTER  
CODE” will appear at the top of the screen, along with four digits at the left.  
Select a 4-digit code that you would like to use for locking the thermostat. Press  
the UP and DOWN buttons to change each digit individually, using the NEXT  
button to cycle through which digit is selected. Pressing the OK button will lock  
the thermostat touch panel using the 4-digit code that is shown on the screen,  
and return to the Normal Run screen with a padlock shown to confirm that the  
thermostat is now locked.  
TO UNLOCK THE KEYPAD: Press the padlock icon, and the words “UNLOCK  
KEYBOARD?” will appear at the top of the screen. Press OK to proceed with  
entering the unlock code (or press the EXIT button to cancel). The words “ENTER  
CODE” will appear at the top of the screen, along with four digits at the left. You  
will need to enter the proper unlock code that was used for initially locking the  
thermostat. Press the UP and DOWN buttons to change each digit individually,  
using the NEXT button to cycle through which digit is selected. With the correct  
lock code entered on the screen, pressing the OK button will unlock the  
thermostat. If the code entered does not match the current keypad lock code,  
the words “WRONG CODE” will flash briefly, and you may try to enter the correct  
code again.  
AIR FILTER MONITOR: In most systems that use a blower fan and air ducts, there  
is an air filter that is either replaceable or requires cleaning. The filter is usually  
located in the air handler, where the blower fan is. This thermostat feature  
assists you with keeping track of proper maintenance and/or periodic  
replacement intervals for your system’s filter.  
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The Air Filter Monitor counts the duration of filter usage that has occurred, since  
the last time the Filter Monitor has been reset. This feature is for information  
purposes only, and does not affect the operation of your heating or cooling  
equipment, or the thermostat. When the filter usage duration has expired, the  
words “CHANGE FILTER” will appear at the top of the display screen, alternating  
with the current DAY and PERIOD.  
TO ACCESS FILTER INFORMATION: Press the MENU button, then press the SCROLL  
button until “SET/REVIEW FILTER USAGE” is shown, then press the OK button.  
The words “FILTER USAGE COUNT” will appear at the top of the screen, along  
with the total number of hours that have elapsed since the last time the filter  
counter was reset. Press the NEXT button to advance.  
The words “FILTER USAGE RESET?” will appear at the top of the screen. To reset  
the filter counter to the start of the current limit setting press the OK button.  
Press the NEXT button to advance.  
The words “ADJUST VALUE FILTER LIMIT” will appear at the top of the screen.  
This shows the current setting value for how many filter run time hours can  
elapse before showing “CHANGE FILTER” in the Normal Run screen. The  
adjustment range for this setting is from 0 hours to 2000 hours, with 720 hours  
as the default. A filter limit setting of 0 (zero) hours will disable the filter  
monitor feature. Once complete, press the EXIT button to save all settings and  
return to the Normal Run screen.  
NOTE: Air filters are sold based upon how many days they are rated for. One day  
of filter run time is actually considered only 8 hours (not a full 24, since your  
heating and/or cooling system only runs for approximatly one third of the time).  
For a “90-day” filter, use a limit setting of 720 hours should be used, and for a  
“30-day” filter, a limit setting of 240 should be used.  
ENERGY USAGE MONITOR: Your thermostat contains a timer, which records the  
amount of “on-time” for your heating and cooling systems. There are three  
records that can be displayed for both Heat and Cool modes:  
1) The amount of system run time so far for today.  
2) The amount of system run time for yesterday.  
3) The total cumulative system run time since the timer was reset.  
The Heat Energy Usage information is shown while the System Mode switch is in  
the Heat position, and the Cool Energy Usage information is shown while the  
System Mode switch is in the Cool position. The following examples are shown  
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for viewing the Energy Usage while in Heat mode. Viewing the Cool mode  
information is done in the same exact manner in Cool mode.  
TO VIEW THE ENERGY USAGE TIMERS: Press the MENU button, then press the  
SCROLL button until “REVIEW HEAT ENERGY USAGE” is shown, then press the OK  
button. The words “TODAYS ENERGY USAGE” will appear at the top of the screen,  
along with the amount of heating system runtime (displayed as “HH:MM”, for  
hours and minutes). Use the NEXT button to cycle between Today’s Usage,  
Yesterday’s Usage, and the Total Cumulative Usage for heat mode. NOTE: For the  
Total Cumulative Usage, the timer will record up to a maximum of 99 hours and  
59 minutes, then the display will change to “HHHH” for hours only, without the  
colon in the center.  
Pressing NEXT after the Total Cumulative Usage will show the words “TOTAL  
USAGE RESET?” at the top of the screen. Pressing OK at this screen will clear  
the Heat Energy Usage timer, and start back at 0 (zero). Press the EXIT button to  
return to the Normal Run screen.  
HARDWARE RESET: The Hardware Reset button (labeled “HW  
RST”) is a small round push button that is located towards the  
HW  
RST  
right side of the circuit board, just below the battery holder.  
Pressing this button will cause the LCD display screen to  
become fully populated, the heating and cooling load relays to  
cycle off, read the position of the Hardware Setup Option  
switches, and will perform an internal system check of the thermostat  
components. If your thermostat appears to be acting in an erratic manner,  
pressing the Hardware Reset button may remedy this behavior. The temperature  
programs are not erased when a hardware reset is performed, however the clock  
will have to be changed to match the current day and time.  
SOFTWARE RESET: The Software Reset button (labeled “SW  
RST”) is a small round push button that is located towards the  
SW  
RST  
right side of the circuit board, just below the battery holder. A  
Software Reset is used to erase all heating and cooling  
temperature programs, and any user-adjustable software  
values such as: Swing, Offset, and Calibration, to their original  
factory default values. To perform a Software Reset, press and hold the Software  
Reset button for at least 5 seconds. The LCD display screen will become fully  
populated, then return to normal. The thermostat will still retain the current day  
and time even after a Software Reset has been performed.  
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COMPRESSOR PROTECTION BYPASS: This optional feature permits the installer  
or service technician to temporarily disable the built in compressor protection  
delays. This is most useful for diagnosing and testing the heating and cooling  
systems after installation is complete, and should not be used during normal  
operation. To activate this feature, start with the System Mode switch in either  
the Heat or Cool positions, then change to the OFF position. Press and hold the  
OK button for at least 5 second. The thermostat will give a single beep sound to  
confirm that this feature has been activated. All compressor protection delays  
(in all modes of operation) will be disabled for 5 minutes. After the 5-minute  
duration has expired, the thermostat will return to normal operation  
automatically.  
BATTERY REPLACEMENT:  
This thermostat is powered by two “AA” Alkaline batteries. The batteries should  
be replaced AT LEAST once per year to ensure reliable operation (or sooner, if the  
“LO-BATTERY” icon appears at the bottom of the display screen). The batteries  
are located on the back of the thermostat, at the top of the circuit board. The  
front portion of the thermostat can be removed from the back half by pulling  
straight outwards on the top and bottom of the thermostat housing, at the large  
indentations that are present in the center of the top and bottom edges.  
When installing new batteries, we recommend using only brand new Energizer®  
or DURACELL®, “AA” size alkaline batteries. Please observe the polarity  
markings shown in the battery compartment to ensure proper installation. When  
finished, line up the front of the thermostat to the base, and firmly press together  
to securely latch the front and back halves together properly.  
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TECHNICAL ASSISTANCE:  
If you have any problems installing or using this thermostat, please carefully and  
thoroughly review the instruction manual. If you require assistance, please  
contact our Technical Assistance department at 856-234-8803 during regular  
business hours between 8:00AM and 4:30PM Eastern Standard Time, Monday  
through Friday. You can also receive technical assistance online anytime day or  
guides, answers to the most common technical questions, and also permits you  
to email your questions to our technical support staff at your convenience.  
LIMITED WARRANTY:  
If this unit fails because of defects in materials or workmanship within three  
years of the date of original purchase, LUX will, at its option, repair or replace it.  
This warranty does not cover damage by accident, misuse, or failure to follow  
installation instructions. Implied warranties are limited in duration to three years  
from the date of original purchase. Some states do not allow limitations on how  
long an implied warranty lasts, so the above limitation may not apply to you.  
Please return malfunctioning or defective units to the location from which the  
purchase was made, along with proof of purchase. Please refer to “TECHNICAL  
ASSISTANCE” before returning thermostat. Purchaser assumes all risks and  
liability for incidental and consequential damage resulting from installation and  
use of this unit. Some states do not allow the exclusion of incidental or  
consequential damages, so the above exclusion may not apply to you. This  
warranty gives you specific legal rights and you may also have other rights,  
which vary from state to state. Applicable in the U.S.A. and Canada only.  
MERCURY WARNING AND RECYCLING NOTICE:  
Mercury is considered to be a hazardous material. If this product is replacing a  
thermostat that contains mercury in a sealed tube, contact your local waste  
management authority for instructions regarding recycling and proper disposal.  
It may be unlawful in your state to place it in the trash.  
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FAN  
AUTO  
ON  
MENU  
˚
F
PM  
˚
F
SET  
HEAT  
OFF  
COOL  
Mt. Laurel, New Jersey 08054, USA  
856-234-8803  
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