Lux Products P722U Thermostat User Manual

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P722U  
SMART TEMP® UNIVERSAL  
7-DAY PROGRAMMABLE THERMOSTAT  
(FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS)  
INSTALLATION AND OPERATING INSTRUCTIONS  
52133  
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.  
SYSTEM COMPATIBILITY . . . . . . . . . 2  
FEATURES . . . . . . . . . . . . . . . . . . . 3  
TOOLS YOU MAY NEED . . . . . . . . . . . 3  
MOUNTING LOCATION . . . . . . . . . . . 4  
REMOVE OLD THERMOSTAT . . . . . . . 4  
INSTALL THERMOSTAT BASE . . . . . . . 5  
WIRING INFORMATION . . . . . . . . . . . 5  
CAUTIONS AND WARNINGS . . . . . . . . 6  
WIRING DIAGRAMS . . . . . . . . . . . . . 8  
HARDWARE SETUP OPTIONS . . . . . . 17  
COMPLETE THE INSTALL . . . . . . . . . 19  
FRONT PANEL ITEMS . . . . . . . . . . . 19  
OPERATING INSTRUCTIONS . . . . . . . 21  
TEMPERATURE PROGRAMS . . . . . . . 23  
ADVANCED FEATURES . . . . . . . . . . 24  
BATTERY REPLACEMENT . . . . . . . . . 33  
TECHNICAL ASSISTANCE . . . . . . . . . 33  
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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P722U  
LCD Display Screen  
Fan Mode  
Switch  
FAN  
Set Slide  
Switch  
AUTO  
ON  
SET  
S
ET  
RUN  
DAY/TIME  
F
˚
F
˚
HEAT  
TEMP PROG  
SPEC PROG  
FILT  
/ ENRGY  
TEMPERATURE  
HEAT  
:
5 36  
P
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 or 2 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 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  
expose the wiring connections.  
FF  
O
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. 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.  
4. 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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CAUTIONS AND WARNINGS:  
The 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 LUX 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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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: HEATING .............................................8  
1-STAGE OR 2-STAGE  
2, 3, 4, 5 WIRES  
CONVENTIONAL: HEATING .............................................9  
3-WIRE ZONE VALVE  
3, 4 WIRES  
CONVENTIONAL: COOLING............................................10  
1-STAGE OR 2-STAGE  
3, 4, 5 WIRES  
CONVENTIONAL: HEATING AND COOLING...........................11  
1-STAGE  
4, 5 WIRES  
CONVENTIONAL: HEATING AND COOLING...........................12  
1-STAGE OR 2-STAGE  
4, 5, 6, 7 WIRES  
CONVENTIONAL: HEATING AND COOLING...........................13  
TWO-TRANSFORMERS  
5, 6 WIRES  
HEAT PUMP:  
HEAT PUMP:  
HEATING AND COOLING...........................14  
SINGLE-STAGE ONLY  
4, 5 WIRES  
HEATING AND COOLING...........................15  
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 #9. 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 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:  
ON  
1
2
3
4
5
6
7
8
9
SWITCH #1 (SYSTEM): [OFF/DOWN = 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/UP = 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/DOWN = PROG, default] The thermostat controls  
the room temperature by following temperature program periods that you set  
up based upon your daily routine. [ON/UP = 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.  
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SWITCH #3 (PERIODS): [OFF/DOWN = 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/UP = 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.  
SWITCH #4 (SCALE): [OFF/DOWN = F, default] All temperature values are  
displayed using the Fahrenheit scale. [ON/UP = C] This setting displays all  
temperature values using the Celsius scale.  
SWITCH #5 (TIME): [OFF/DOWN = 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/UP = 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/DOWN = 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/UP = 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/DOWN = 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/UP =  
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 RECOV” will be shown at the top of the display screen, alternating  
with the current DAY and PERIOD.  
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SWITCH #8 (BATTERY MONITOR): [OFF/DOWN = ON, default] This setting,  
regularly monitors the battery level, and shows “LOW BAT” on the screen if  
the batteries need to be replaced. Use this setting at all times when  
batteries are present in the thermostat. [ON/UP = OFF] This setting only  
applies if you are NOT physically using batteries in the thermostat, and are  
powering the thermostat entirely from the system (“C” wire terminal).  
SWITCH #9 (FAN): [OFF/DOWN = 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. [ON/UP =  
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 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.  
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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).  
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.  
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.  
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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 prevent damage to the heat pump if outside  
temperatures are below the manufacturer’s recommendations. As every heat  
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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.  
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 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 may continue to perform short  
single presses of the COPY/EMER button to proceed with copying to the  
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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 SWING AND OFFSET SETTING: 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.  
NOTE: The Swing and Offset 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 CHANGE THE SWING SETTING: Ensure that the System Mode switch is in  
the OFF position and the Set Slide switch is in the RUN position. Press and  
hold the HOLD button for at least 5 seconds. The words “SET” and “SWING”  
will appear in the upper right corner of the screen, along with a single  
flashing digit. Use the UP/DOWN buttons to change the number value  
between 1 and 9 (0.25F to 2.25F, in 0.25F degree increments). Number 1 is  
the default setting. Press the NEXT button to accept the swing setting and  
proceed to the OFFSET setting.  
TO CHANGE THE OFFSET: After the Swing value has been accepted, the  
words “SET” and “OFFSET” will be shown on the screen, along with a  
flashing digit. 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 to  
9 degrees. When set to 0 degrees, the second heating stage is completely  
disabled while in regular Heat mode (Emergency Heat mode will still function  
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for heat pump configurations). An Offset value from 1 to 9 degrees will  
determine the number of degrees from the set point that will be required for  
the 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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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: 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 “CAL” will 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.  
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  
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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.  
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.  
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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, 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.  
TO SET THE HEAT LIMIT STOP: Place the System Mode switch in the OFF  
position, and the Set Slide switch in the RUN position. Press and hold the  
UP button while sliding the System Mode switch from OFF to HEAT. The  
words “CODE” and “T-STOP” will appear at the top of the screen, along with  
two digits. Use the UP/DOWN buttons to select the proper code to access the  
heat limit setting. Press the NEXT button to accept the setting. If the code  
you tried was not correct, the thermostat will exit and return to the Normal  
Run screen with no changes made. If the entered code is correct, the screen  
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will add the word “SET” and display the current heat set temperature limit.  
Use the UP/DOWN buttons to adjust the maximum heat set temperature  
value. Press the NEXT button to accept the setting and return to the Normal  
Run screen in heat mode.  
TO SET THE COOL LIMIT STOP: Place the System Mode switch in the OFF  
position, and the Set Slide switch in the RUN position. Press and hold the  
DOWN button while sliding the System Mode switch from OFF to COOL. The  
words “CODE” and “T-STOP” will appear at the top of the screen, along with  
two digits. Use the UP/DOWN buttons to select the proper code to access the  
cool limit setting. Press the NEXT button to accept the setting. If the code  
you tried was not correct, the thermostat will exit and return to the Normal  
Run screen with no changes made. If the entered code is correct, the screen  
will add the word “SET” and display the current cool set temperature limit.  
Use the UP/DOWN buttons to adjust the minimum cool set temperature  
value. Press the NEXT button to accept the setting and return to the Normal  
Run screen in cool mode.  
TO CHANGE THE TEMPERATURE STOP LOCK CODE:
IF YOU FORGET YOUR TEMPERATURE STOP CODE:
KEYPAD LOCKOUT: You can lock the front 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.  
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TO LOCK THE KEYPAD:
TO UNLOCK THE KEYPAD:
nd the wod“ENTER CO
IF YOU FORGET YOUR KEYPAD LOCK CODE:
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  
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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 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,  
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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 if 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  
HW RST  
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 left side if the circuit board, just below the  
battery holder. A Software Reset is used to erase all  
SW RST  
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, than 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, 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.  
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 “-- -- LOW BATT -- --” appears at the top 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.  
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  
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you troubleshooting 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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S
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HEAT  
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SETBACK  
HOLD  
Mt. Laurel, New Jersey 08054, USA  
856-234-8803  
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