Lux Products P722Ub Thermostat User Manual

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P722Ub  
SMART TEMP® UNIVERSAL  
7-DAY PROGRAMMABLE THERMOSTAT  
(FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS)  
INSTALLATION AND OPERATING INSTRUCTIONS  
52141  
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 . . . . . . . . . . . . . . 6  
WIRING DIAGRAMS . . . . . . . . . . . . . . . . 8  
COMPLETE THE INSTALL . . . . . . . . . . . 17  
FRONT PANEL ITEMS . . . . . . . . . . . . . . 17  
SYSTEM CONFIGURATION AND  
SETUP OPTIONS. . . . . . . . . . . . . . . . . . 18  
OPERATING INSTRUCTIONS . . . . . . . . . 21  
TEMPERATURE PROGRAMS . . . . . . . . . 23  
ADVANCED FEATURES . . . . . . . . . . . . . 24  
BATTERY REPLACEMENT . . . . . . . . . . . 32  
TECHNICAL ASSISTANCE . . . . . . . . . . . 33  
LIMITED WARRANTY . . . . . . . . . . . . . . 33  
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  
© 2014 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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P722Ub  
LCD Display Screen  
Fan Mode  
Switch  
Set Slide  
Switch  
FAN  
AUTO  
ON  
SET  
RUN  
DAY/TIME  
TEMP PROG  
SPEC PROG  
FILT  
/ ENRGY  
TEMPERATURE  
HEAT  
SETBACK  
HOLD  
OFF  
COPY/  
EMER  
COOL  
NEXT  
System Mode  
Switch  
UP / DOWN Buttons  
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 or 2 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), or on heat pumps  
that have two compressor stages (Y2). Ask your dealer for other LUXPRO  
thermostats to control those systems.  
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FEATURES:  
• 1 or 2-Heat / 1 or 2-Cool, 7-day programming  
• Universal Compatibility for all system types  
• Each day of the week can be programmed separately  
• Exclusive LUX® Speed SlideTM for easy programming  
• User-selectable periods per day (2 or 4)  
• User-selectable programmable or non-programmable operation  
• LuxLight® EL (Electro-Luminescent) lighted display  
• Energy usage monitor  
• Special program feature  
• 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:  
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).  
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.  
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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 both 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 ............................................................9  
1-STAGE OR 2-STAGE  
2, 3, 4, 5 WIRES  
HEATING ..........................................................10  
3-WIRE ZONE VALVE  
3, 4 WIRES  
COOLING ..........................................................11  
1-STAGE OR 2-STAGE  
3, 4, 5 WIRES  
HEATING AND COOLING .....................................12  
1-STAGE  
4, 5 WIRES  
HEATING AND COOLING .....................................13  
1-STAGE OR 2-STAGE  
4, 5, 6, 7 WIRES  
HEATING AND COOLING .....................................14  
TWO-TRANSFORMERS  
5, 6 WIRES  
HEATING AND COOLING .....................................15  
SINGLE-STAGE ONLY  
4, 5 WIRES  
HEAT PUMP:  
HEATING AND COOLING .....................................16  
WITH AUX / EMERGENCY HEAT  
5, 6 WIRES  
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COMPLETE THE INSTALL:  
INSTALL BATTERIES INTO THERMOSTAT: Install two brand new Energizer® or  
DURACELL® “AA” size alkaline (only) batteries, into the thermostat’s battery  
compartment. Ensure the batteries are installed in the proper direction.  
FRONT PANEL ITEMS:  
These items below are all located behind the door on the front of the thermostat.  
To open the door, pull outwards using the small indentation in the center of the  
top edge 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.  
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).  
MULTI-FUNCTION, SET SLIDE SWITCH: This switch provides an easy way to  
quickly access the most commonly used thermostat settings. This switch has 5  
individual positions, and unless a specific setting is being adjusted, this switch  
should always remain in the RUN position for the thermostat to control the room  
temperature. The other Set Slide switch positions are described in greater detail  
in the ADVANCED FEATURES section. NOTE: this switch is only operable when the  
thermostat is in “Programmable” mode. When the thermostat is used in  
“Manual” control mode, all 5 of the switch positions will act like the RUN  
position, except the “FILT/ENRGY” position.  
SETBACK BUTTON: This button activates and deactivates the SETBACK feature,  
which overrides the set temperature for an adjustable duration. This feature is  
described in greater detail in the ADVANCED FEATURES section.  
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UP / DOWN BUTTONS: The UP and DOWN buttons are used to adjust any item  
that can be changed by the user. Examples are the set temperatures, clock  
times, and days of the week. In many cases, an item may be flashing if it can  
currently be adjusted.  
HOLD BUTTON: This button activates and deactivates the manual Temperature  
Hold feature, and is also used for activating and deactivating the Special  
Program feature. These features are described in greater detail in the  
OPERATING INSTRUCTIONS and ADVANCED FEATURES sections.  
COPY / EMERG BUTTON: While setting temperature programs, this button allows  
you to quickly copy settings from one day to another. When in Normal Run mode,  
the usage of this button varies depending upon your specific system  
configuration. For heat pump systems, pressing this button enables your  
emergency heat function, which is described in greater detail in the OPERATING  
INSTRUCTIONS section. For conventional systems, there is no such thing as  
emergency heat, so this button will have no effect.  
NEXT BUTTON: This button is mostly used while setting items such as software  
options, and temperature program periods. When there are several items on the  
screen that can be changed, usually one of them is flashing indicating that it can  
be adjusted. Pressing the NEXT button will cycle through which item is flashing.  
SYSTEM CONFIGURATION AND SETUP OPTIONS:  
Setup options for how the thermostat will function, along with choosing your  
particular system type, are performed using a menu on the display screen.  
TO ACCESS THE SETUP MENU: Move the System Mode switch into the OFF  
position, and then hold down the EMER button for approximately 5 seconds until  
the screen changes. The menu will always start with item #1, and is advanced to  
each following item by a single press of the NEXT button. The options for each  
item are changed using the UP or DOWN buttons.  
ITEM #01 (CLOCK FORMAT): [12Hr, default] This displays the clock times using  
standard AM and PM values. [24Hr] This displays the clock times using the  
military-time format (example 22:00 hours, without using AM or PM).  
ITEM #02 (TEMPERATURE SCALE): [F, default] Shows all temperature values in  
Fahrenheit. [C] Shows all temperature values Celsius.  
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ITEM #03 (THERMOSTAT TYPE): [PROGRAMMABLE, default] Use this setting for  
following a daily program routine. [MANUAL] This setting omits the program  
routine and operates as a manual style non-programmable thermostat. This is  
very basic and only shows the room temperature and set temperature on the  
screen, with no clock.  
ITEM #04 (PERIOD QUANTITY): [4P, default] Thermostat uses four periods per  
day (called MORN, DAY, EVE, and NITE). [2P] The thermostat uses two periods per  
day (called DAY and NITE).  
ITEM #05 (EARLY RECOVERY): [OFF, default] Program Set Temperature values  
start to occur at exactly the period start times. [ON] Early Recovery affects how  
the transition occurs when changing from the NITE to the MORN period, and  
when changing from the DAY to the EVE period. The thermostat calculates how  
long it takes for your home to recover from a setback on a daily basis, and turns  
on ahead of time in order to reach the target set point of the next upcoming  
program period by the period’s start time. While in a recovery, the word  
“RECOV.” will be shown on the display screen.  
ITEM #06 (SYSTEM MODE): [FURN, default] This is for the majority of heating  
systems that are not Heat Pumps, such as a gas furnace or hot water boiler. [HP]  
Use this setting if you have a Heat Pump system, which uses the outdoor unit as  
the primary heat source and may also contain an electric heating element as a  
backup heat source. When set to “HP”, ensure that you have also set the  
Gas/Electric circuit board option to “ELEC”, as described in the “COMPLETE THE  
INSTALL” section.  
ITEM #07 (FAN “G” TERMINAL OPERATION): This setting changes how your  
system’s blower fan (if applicable) is controlled while the thermostat is in HEAT  
or EMERG HEAT mode, when the Fan switch in the AUTO position. This setting  
does not affect the fan operation while in COOL mode.  
[GAS, default] The blower fan is controlled solely by the heating system itself.  
Systems that would typically use the “GAS” setting would be: natural gas,  
propane, or oil furnaces, and boilers.  
[ELEC] The blower fan is controlled directly by the thermostat. This setting is  
required for heating systems that do not control their own fan, such as HEAT  
PUMPS, and units that only have an electric-resistive heating element as the heat  
source.  
NOTE: If your blower fan does not operate properly after installation, try changing  
the GAS / ELEC option to the “ELEC” setting.  
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ITEM #08 (DELAY TIME): [5, default] Thermostat waits 5 minutes before turning  
the system back on after it was last run. This internal delay prevents rapid  
cycling and provides equipment protection. The 5 minute setting is fine for most  
applications. [2] Same operation as above but reduced to 2 minutes between  
state changes.  
ITEM #09, #10, #11 (SYSTEM CYCLE DURATION): These three settings will  
control how frequently your heating/cooling system will be allowed to cycle ON  
during room temperature control. The possible setting values for these three  
items are: 60, 30, 20, 15, 12, 10, 8, and 6. Whether all three of these items are  
shown, and their available values, will change depending upon what type of  
heating system you have selected previously in ITEM #06.  
#09 = HEAT MODE, CYCLE DURATION  
#10 = COOL MODE, CYCLE DURATION  
#11 = EMERGENCY HEAT, CYCLE DURATION  
When the heating/cooling system turns on, it will remain running for as long as  
necessary to reach and maintain your target set temperature. EXAMPLE: with an  
ITEM #09 HEAT CYCLE setting of 12, the heating system will turn on  
approximately 5 times per hour (turning ON once every 12 minutes). With an  
ITEM #10 COOL CYCLE setting of 20, the cooling system will turn on  
approximately 3 times per hour (turning ON once every 20 minutes).  
ITEM #12 (STAGE-2 OFFSET): [4, default] This setting is adjusted as a number  
from 0 to 9. This setting varies how low the room temperature must drop before  
the second (auxiliary) heating stage becomes activated, if present. When set to 0  
(ZERO), the second heating stage is completely disabled while in regular Heat  
mode (however Emergency Heat mode will still function for heat pump  
configurations). A lower number will make the second stage turn on sooner,  
while a larger number will permit a larger decrease in room temperature to occur  
before bringing on the second heating stage.  
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OPERATING INSTRUCTIONS:  
SET DAY AND TIME: Place the Set Slide Switch into the DAY/TIME position. 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. Return the Set Slide switch to the RUN position when  
finished.  
HEATING AND COOLING: Basic operation of your heating or cooling system can  
be obtained with the Set Slide Switch in the RUN position and choosing either  
HEAT or COOL on the System Mode switch. The temperature can be adjusted  
using the UP and DOWN buttons. When the thermostat is first powered up, it will  
follow a default temperature routine that is preset from the factory (shown  
below).  
PERIOD  
HEAT  
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 85 °F (29 °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 82 °F (28 °C)  
EMERGENCY HEAT: (Heat Pump Configuration Only). While in normal Heat mode  
with the Set Slide switch in the RUN position, one single press of the COPY/EMER  
button will activate Emergency Heat mode. A single press again will end  
Emergency Heat mode, and return back to normal Heat mode. While in  
Emergency Heat mode, the word “EMER” will also be shown in the middle portion  
of the display screen. If a power loss occurs while in Emergency Heat mode, the  
thermostat will continue to remain in 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  
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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.  
LCD DISPLAY BACKLIGHT: The display screen is lighted to assist viewing at  
nighttime, or in locations with low light levels. A press of any button on the front  
panel will light the display for approximately 10 seconds. Any button 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 Program RUN mode, the set temperature can  
be temporarily changed by pressing UP or DOWN. 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 word “OVERRIDE” will be shown in the display screen.  
An Override may be cancelled moving the mode switch to OFF, then back to HEAT  
or COOL.  
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 thermostat has adequate power. To enter Hold mode:  
press the HOLD button one time and the word “HOLD” will appear in the display.  
To cancel a Hold, press the HOLD button one more time. If a complete 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.  
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.  
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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.  
SET TEMPERATURE PROGRAMS: Move the Set Slide switch to the TEMP PROG  
position. Programming will start with Monday. Use the UP/DOWN buttons to  
adjust the start time for the MORN period, then press the NEXT button to  
advance. Use the UP/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. Return the Set Slide switch to the RUN position when you are  
finished.  
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. With the Set Slide  
switch in the TEMP PROG position, press the COPY/EMER button one time. The  
words “COPY PROG” will briefly appear on the screen and flash once, followed by  
“FRM” and “TO”. Next to FRM, a day of the week will be flashing. Using the  
UP/DOWN buttons, select the day that you want to copy from. Press the NEXT  
button one time. Your “copy from” day should be on steady with the “copy to”  
day 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/EMER button will perform the Copy,  
and the flashing “copy to” day will have advanced to the next following day. You  
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may continue to perform short single presses of the COPY/EMER button to  
proceed with copying to the remaining days, one after the other (specific days  
may be skipped by pressing the UP button to advance past them when they are  
flashing in the “copy to” location). To exit the Copy feature, and return to the  
regular temperature program screen, press and hold the NEXT button for more  
than 2 seconds. Return the Set Slide Switch to the RUN position when you are  
finished.  
ADVANCED FEATURES:  
TEMPERATURE CALIBRATION: 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.  
NOTE: The Temperature Calibration setting need to be performed in a timely  
manner, as the thermostat will timeout and automatically exit the adjustment  
screen after approximately 10 seconds without a button press.  
TO CHANGE THE TEMPERATURE CALIBRATION: Ensure that the System Mode  
switch is in the OFF position and the Set Slide switch is in the RUN position.  
Press and hold both the UP and DOWN buttons together for at least 5 seconds.  
The words “SET” and “CALwill appear in the upper right corner of the screen,  
along with a single flashing temperature digit. Use the UP/DOWN buttons to  
change the number of degrees of adjustment. 0° degrees is the default value,  
and means no correction is being applied. Press the NEXT button to accept the  
setting.  
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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TO START A SETBACK: Ensure that the System Mode switch is in either the Heat  
or Cool position, and that the Set Slider is in the RUN position. Press and hold  
the SETBACK button for at least 2 seconds. The screen will change and show the  
words “HOURS LEFT” and “OVERRIDE”, along with two digits. Use the UP/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  
“HOURS LEFT” to “DAYS LEFT”, with an available duration of 1 to 30 days. Once  
your desired Setback duration is shown on the screen, you can either wait for the  
screen to advance forward on its own, or press the NEXT button (behind the door)  
one time to jump ahead rapidly. Now use the UP/DOWN buttons to select your  
desired set temperature that will be used for the Setback duration. Just like the  
previous step, you can either wait for the screen to advance on its own, or press  
the NEXT button to advance and return to the Normal Run screen.  
TO CANCEL A SETBACK: While in the Normal Run screen, press and hold the  
SETBACK button for at least 2 seconds. The word “OVERRIDE” will disappear  
from the screen and the Setback will be cancelled. Moving the System Mode  
switch or Set Slide switch, will also cancel a Setback.  
SPECIAL PROGRAM FEATURE: The Special Program operates in the same manner  
as the normal heating and cooling programs do, however the Special Program  
activation is temporary, for a selected number of days (1-30). The Special  
Program period times and temperatures can all be set to different values to  
accommodate a wide variety of usage circumstances that may occur, such as:  
being home for a couple days instead of at work, or a vacation cut short. This  
feature eliminates the need to temporarily alter the normal temperature program  
settings that continue to be used most of the time. The heat Special Program is  
set in HEAT mode, and the cool Special Program is set in COOL mode. The  
“number of days remaining” counter decrements by one day, every 12:00 AM  
(Midnight).  
NOTE: Just like the regular temperature programs, The Special Program has 4  
separate periods for both Heat and Cool mode (MORN, DAY, EVE, and NITE). If the  
thermostat is configured to use only 2 periods per day instead of 4 (HARDWARE  
SETUP OPTIONS), the Special Program will only use the DAY and NITE periods.  
The MORN and EVE periods will not be visible on the screen.  
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TO SET THE SPECIAL PROGRAM VALUES: Move the Set Slide switch to the SPEC  
PROG position. The screen will display “S-PROG”. Use the UP/DOWN buttons to  
adjust the start time for the MORN period, then press the NEXT button to  
advance. Use the UP/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. Return the Set Slide switch  
to the RUN position when you are finished.  
NOTE: When activating the Special Program feature, button presses need to be  
performed in a timely manner, as the thermostat will timeout and automatically  
exit the setting screen after approximately 10 seconds without a button press.  
TO ACTIVATE THE SPECIAL PROGRAM: Press and hold the HOLD button for at least  
5 seconds. The words “S-PROG” and “DAYS LEFT” will appear on the screen,  
along with a two digits. Use the UP/DOWN buttons to change the numbers for the  
desired number of days that you would like the Special Program to be used.  
Press the NEXT button to accept the setting and exit. While the Special Program  
is in effect, the clock time will alternate with the words “SPECIAL DAYS” and a  
two-digit value to indicate the amount of days remaining.  
TO CANCEL THE SPECIAL PROGRAM: Press and hold the HOLD button for at least  
5 seconds. The “SPECIAL DAYS” will stop alternating with the clock time, and the  
thermostat will now be in Normal Run 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,
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KEYPAD LOCKOUT: You can lock the front panel buttons to prevent unauthorized  
tampering of your thermostat settings.  
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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.  
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 SET THE AIR FILTER DURATION: Move the Set Slide switch to the “FILT/ENRGY”  
position. The words “FILTER LEFT” will be shown at the top of the display  
screen. Press either of the UP/DOWN buttons to select the desired filter duration  
(in days) from the following choices: OFF, 30, 60, 90, 120, 180, or 365. If the  
filter duration value is set to “OFF”, then the Air Filter Monitor will be completely  
disabled.  
TO RESET THE FILTER USAGE COUNTER: Move the Set Slide switch to the  
“FILT/ENRGY” position. The words “FILTER LEFT” will be shown at the top of the  
screen. Press both the UP and DOWN buttons together, and the usage counter  
will return to the beginning of the value that it originally started counting from.  
Refer to the previous paragraph, should you wish to change the starting value for  
the filter monitor. Return the Set Slide switch to the RUN position when you are  
finished.  
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.  
TO VIEW THE HEAT USAGE TIMERS: Place the System Mode switch in the OFF  
position, and the Set Slide switch in the FILT/ENRGY position. Press and hold the  
NEXT button while sliding the System Mode switch from OFF to HEAT. The words  
“TODAY USAGE” will appear at the top of the screen, along with the word “HEAT”  
and the amount of heating system runtime (displayed as “HH:MM”, for hours and  
minutes). Use the UP/DOWN buttons to cycle between Today’s Usage, Yesterday’s  
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Usage, and the Total Cumulative Usage. 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.  
Return the Set Slide switch to the RUN position when you are finished.  
TO RESET THE HEAT ENERGY USAGE: While viewing the Total Usage value, press  
and hold the HOLD button for at least 4 seconds. The usage should now be  
displayed as “00:00”. Return the Set Slide switch to the RUN position when you  
are finished.  
TO VIEW THE COOL USAGE TIMERS: Place the System Mode switch in the OFF  
position, and the Set Slide switch in the FILT/ENRGY position. Press and hold the  
NEXT button while sliding the System Mode switch from OFF to COOL. The words  
“TODAY USAGE” will appear at the top of the screen, along with the word “COOL”  
and the amount of cooling system runtime (displayed as “HH:MM”, for hours and  
minutes). Use the UP/DOWN buttons to cycle between Today’s Usage, Yesterday’s  
Usage, and the Total Cumulative Usage. 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.  
Return the Set Slide switch to the RUN position when you are finished.  
TO RESET THE COOL ENERGY USAGE: While viewing the Total Usage value, press  
and hold the HOLD button for at least 4 seconds. The usage should now be  
displayed as “00:00”. Return the Set Slide switch to the RUN position when you  
are finished.  
HARDWARE RESET: The Hardware Reset button (labeled “HW  
RST”) is a small round push button that is located towards the  
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  
HW RST  
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.  
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SOFTWARE RESET: A Software Reset is used to erase ALL heating and cooling  
temperature programs, and to return all user-adjustable software settings back  
to their original factory default values. To perform a Software Reset, first ensure  
that the thermostat’s Keypad Lockout is not enabled and then move the System  
Mode switch to the OFF position. Press and hold the UP, DOWN, and NEXT  
buttons all together for at least 5 seconds. The LCD display screen will become  
fully populated (let go of buttons at this point), and than return to normal. The  
clock will have to be changed to match the current day and time.  
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, press and hold both the NEXT and HOLD  
buttons, while also perform a single press of the Hardware Reset button (the LCD  
display screen will become fully populated). Continue to hold the NEXT and  
HOLD buttons until the LCD display screen returns to normal. 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.  
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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  
phrase “LO BATT” appears in the display screen). The batteries are located on  
the back of the thermostat’s circuit board. The front portion of the thermostat  
can be removed from the back half by using the tabs on the top edge of the  
thermostat housing.  
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.  
BATTERY GRAPHIC: Anytime that batteries are  
physically present in the thermostat, there will be  
a visual indication of the remaining battery life  
available on the thermostat’s display screen.  
When brand new batteries are installed in the  
battery compartment, this graphic should indicate  
full battery life remaining with all bars present.  
Over time, as the battery life decreases to the  
point of having only 1 bar left, the Temperature  
and Clock digits will start to alternate between  
showing their normal content, and the words “LO  
BATT”. At this point the batteries will need to be replaced as soon as practical to  
avoid uninterrupted operation of your heating and/or cooling system. In most  
cases, the thermostat will be capable of providing you approximately two months  
of normal operation once the point of 1 bar left has been reached, and the screen  
shows the words “LO BATT”.  
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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.  
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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.  
SETBACK  
HOLD  
Mt. Laurel, New Jersey 08054, USA  
856-234-8803  
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