Lux Products PSP721U Thermostat User Manual

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PSP721U  
®
SMART TEMP UNIVERSAL PROGRAMMABLE THERMOSTAT  
FOR BOTH CONVENTIONAL AND HEAT PUMP SYSTEMS  
52033  
INSTALLATION AND OPERATING INSTRUCTIONS  
IMPORTANT!  
• Please read all instructions carefully before beginning installation  
• Label the terminal designations on your existing wiring before  
removing your existing thermostat  
• Ignore the color of the wires since they may not comply with any  
standard.  
Thank you for your confidence in our product. To obtain the  
best results from your investment, please read these  
instructions and acquaint yourself with your purchase. 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 the systems that it controls. These  
instructions may contain information beyond that required for  
your particular installation.  
1. SYSTEM COMPATIBILITY . . . . . . . . 2  
2. FEATURES . . . . . . . . . . . . . . . . . . 3  
3. TOOLS REQUIRED . . . . . . . . . . . . . 3  
4. SELECTING A LOCATION. . . . . . . . . 4  
5. REMOVE OLD THERMOSTAT . . . . . . 5  
6. MOUNT NEW THERMOSTAT . . . . . . 5  
7. WIRING DIAGRAMS . . . . . . . . . . . . 6  
8. HARDWARE SETUP OPTIONS . . . . 16  
9. COMPLETE THE INSTALL . . . . . . . 18  
10. FRONT PANEL ITEMS . . . . . . . . . . 19  
11. OPERATING INSTRUCTIONS . . . . . 20  
12. ADVANCED FEATURES . . . . . . . . . 24  
13. PROGRAMMING . . . . . . . . . . . . . 29  
14. BATTERIES AND MAINTENANCE. . . 30  
15. TECHNICAL ASSISTANCE . . . . . . . 31  
16. WARRANTY. . . . . . . . . . . . . . . . . 31  
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 Gillette Company, Inc.  
© 2008 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED  
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PSP721U  
Up / Down Buttons  
LCD  
Display  
Screen  
T
U
D
AY  
Fan  
F
Mode  
:
72  
5 36PM  
HEAT  
Switch  
RESET  
NEXT  
COOL  
PROGRAM  
HEAT  
FAN  
TEMERATURE  
HEAT  
PROGRAM  
AUTO  
ON  
R U N  
HOLD  
COPY  
OFF  
COOL  
SET  
DAY/TIME  
System  
Mode  
Switch  
/
EMER  
AIR FILTER  
LUUX  
LUX Rotary Speed Dial®  
Quick Reference  
Instructions  
1. SYSTEM COMPATIBILITY  
The electrical rating for this thermostat is 1.5A per terminal,  
with a maximum of 2.0A for all terminals combined.  
COMPATIBLE WITH:  
• Most 24-volt heating and cooling systems  
• 1 or 2 stage Heat / 1 stage Cool: Gas, Oil or Electric systems  
• 1 or 2 stage Heat / 1 stage Cool: Heat Pump systems  
• 3-wire hydronic (hot water) zone valves  
• Gas Millivolt heaters  
NOT COMPATIBLE WITH:  
• 120/240 VAC line voltage systems without a transformer, ask  
your LUXPRO dealer for thermostats to control these systems.  
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2. THERMOSTAT FEATURES  
• Universal Compatibility (Conventional or Heat Pump)  
• 7 Day Programming  
• 4 Periods per Day  
• Quick Copy Programming  
• Exclusive LUX Speed Dial®  
• Luxlight® EL (Electro-Luminescent) Illuminated Display  
• Filter Monitor  
• Programmable Keypad Lock  
• Optional Smart Recovery  
• Temperature Hold  
• Temporary Temperature Override  
• Energy Star Compliant  
• Battery Free Memory Storage  
• F/C Temperature Display  
• 12/24 Hr Clock Display  
• Adjustable Temperature Differential / Cycle Rate  
• User Temperature Calibration  
• System or Battery Powered  
• 5/2 Minute Selectable Minimum Run/Off Time for  
Equipment Protection  
Please read all of these instructions carefully before  
beginning installation, and save this manual for future  
reference.  
3. TOOLS REQUIRED  
• #1 Phillips screwdriver  
• Drill with 3/16 in. (4.8mm) bit  
• Wire Stripper / Cutter  
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CAUTION:  
This thermostat is protected against normal static electric  
discharges; however touching a grounded metal object  
before touching your thermostat will minimize the risk of  
damaging the unit in extremely dry weather.  
4. SELECTING A LOCATION  
On replacement installations, mount the new thermostat in  
place of the old one unless the conditions listed below  
suggest otherwise. On new installations, follow the  
guidelines listed below.  
1. Locate the thermostat on an inside wall, about 5 ft. (1.5m)  
above the floor, and in a room that is used often.  
2. Do not locate where air circulation is poor, such as in a  
corner or an alcove, or behind an open door.  
3. Do not install it where there are unusual heating  
conditions, such as: in direct sunlight; near a lamp,  
television, radiator, register, or fireplace; near hot water  
pipes in a wall; near a stove on the other side of a wall.  
4. Do not locate in unusual cooling conditions, such as: on a  
wall separating an unheated room; or in a draft from a  
stairwell, door, or window.  
5. Do not locate in a damp area. This can lead to corrosion  
that may shorten thermostat life.  
6. If painting or construction work has yet to be completed,  
cover the unit completely or do not install it.  
WARNING:  
• Read instructions carefully before removing any wires from  
your existing thermostat.  
• All wiring must conform to the local codes and ordinances  
that are in your particular location.  
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• Your thermostat is a precision electronic instrument; please  
handle it with care to avoid damage.  
5. 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.  
F
OF  
2. Remove the cover and front portion of your old thermostat  
to expose the wiring connections.  
3. Write down the letters printed near each wire terminal that  
is used, and the color of the wire that is connected to it.  
Using the enclosed labels, attach a label to each of your  
wires so that the letter matches the marking on your  
existing thermostat.  
4. When they are all labeled, carefully remove the wires one  
at a time, making sure that they do not fall back inside the  
wall. Do not allow any of the bare wire ends to touch  
each other, or any parts on the thermostat.  
5. Loosen all of the screws on the old thermostat and  
remove it from the wall.  
6. MOUNT THE NEW THERMOSTAT  
1. Strip insulation leaving 3/8 in. (9.5mm) bare wire ends  
and clean off any corrosion.  
2. Fill wall opening with non-combustible insulation to  
prevent drafts from affecting the thermostat.  
CAUTION:  
Be careful not to drop the unit or disturb electronic parts.  
Leave the door closed while the body is being removed from  
the base.  
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3. Remove the body from the thermostat’s base by pressing  
the thumb latch at the bottom center of the unit and  
swinging the body away from the base.  
NOTE:  
If you are mounting the base to soft material like  
plasterboard or if you are using the old mounting holes, the  
screws may not hold. Drill a 3/16 in. (4.8mm) hole at each  
screw, and insert the plastic anchors provided.  
4. Hold the base against the wall. Route the wires through  
the hole below the terminal block. Position the base for  
best appearance (to hide any marks from an old  
thermostat). Attach the base to the wall with the two  
screws provided.  
7. WIRING INFORMATION AND DIAGRAMS  
CONNECTING THE WIRES  
5. Wires must be trapped between the black  
clamps and the brass terminals as shown  
here.  
6. Securely tighten all of the electrical terminal  
screws, including any unused ones.  
WIRING DIAGRAM NOTES:  
(Important, please read all notes before connecting wires)  
• If the information provided does not clearly represent your  
system configuration, please refer to the “TECHNICAL  
ASSISTANCE” section of this manual, and contact our  
support department before removing any of your existing  
thermostat wiring.  
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• All of the dashed wires shown in the following 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.  
• The optional “C” terminal is used for powering the  
thermostat by the 24 Volt system power. This can be used  
alone, or in addition to installing batteries.  
• If “Y” and “C” wires are both present, then “C” is most  
likely a system common wire.  
• For Heat Pump systems, use either the “O” terminal or the  
“B” terminal, but not both. If an “O” and a “B” wire are  
both present, “B” is likely a system common and may be  
connected to the “C” terminal. Connecting system  
common power to this thermostat’s “B” terminal may  
damage the thermostat, and also your system.  
• If replacing a Honeywell TM-11, tape off the “R” wire.  
Connect the “B” wire to the “RH” terminal.  
• 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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8. HARDWARE SETUP OPTIONS  
NOTE:  
All of the settings, options, and components listed in the  
following section are located on the rear of the thermostat,  
on the circuit board.  
GAS/ELEC. FAN OPERATION  
ELECRIC  
This is a plastic jumper cap, which is  
JP2  
labeled as JP2. This jumper must remain  
installed, and can be in one of two  
positions, GAS or ELECTRIC.  
GAS  
This setting changes how the system’s blower fan (if  
applicable) is controlled while in HEAT mode, and with the  
Fan switch in the AUTO position. This setting does not  
affect fan operation while in COOL mode. When set to  
“Gas”, the fan is controlled solely by the heating system  
itself. When set to “Electric”, the fan is controlled directly  
by the thermostat. NOTE: If your blower fan does not  
operate properly after installation, move the Gas / Electric  
option to the “Electric” setting.  
OPTION SWITCHES:  
The following option settings are all located  
within a group of small switches labeled 1  
through 6 as shown, and are located in the  
center of the circuit board. Changes made to  
any of these switches are recognized on  
initial power up, or when the front panel  
Temperature Mode switch position has been  
altered in any direction if the thermostat is  
already being powered by batteries.  
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[1] SYSTEM MODE  
This setting tells the thermostat about the type of heating  
and cooling equipment that it is controlling, so that the  
system is operated properly. This switch needs to be in the  
OFF (NON-HP) position if you have a furnace or conventional  
heating and air conditioning system. If you have a Heat  
Pump system, the switch needs to be in the ON (HP)  
position; this is applicable even if your heat pump system  
has an auxiliary heat stage that is a gas furnace.  
[2] RECOVERY  
The Early Recovery feature affects how the thermostat  
transitions from an energy saving setback temperature, to a  
comfort temperature. Normally the change in temperature  
only starts to occur at an upcoming period's start time.  
With Early Recovery Disabled: If you have programmed your  
thermostat for 70°F at 5:00PM, the thermostat will only  
begin to heat your home back up when the time reaches  
5:00PM. With Early Recovery Enabled: Using the same  
scenario as above, the thermostat will calculate the best time  
to turn on the heater, so that the temperature in your home  
reaches 70°F as close to 5:00PM as possible. During the  
time that the thermostat is performing a recovery, the words  
“IN RECOVERY” will flash in the temperature portion of the  
display screen. Switch position OFF is Recovery Disabled,  
and ON is Recovery Enabled.  
[3] DELAY  
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 Delay prevents rapid  
cycling of your system and provides equipment protection  
for cooling units. Switch position OFF is a 5 minute delay,  
and ON is a 2 minute delay. 5 minutes is the default setting,  
and is good for most applications. If you feel that your  
system is trying to cycle more rapidly than every 5 minutes,  
you may try the 2 minute setting.  
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[4] SCALE  
This setting determines how the thermostat displays all  
temperatures on the screen. Switch position OFF is F°, and  
ON is C°.  
[5] TIME  
This setting determines how the thermostat displays the  
clock and all other time values on the screen. Switch  
position OFF is 12 HR (US Standard), and ON is 24 HR  
(Military Time).  
[6] BATTERY MONITOR  
This determines whether the internal battery voltage monitor  
watches the condition of the batteries that are installed in the  
thermostat. This setting should always remain enabled  
unless the thermostat is being powered by System Power  
alone, without any batteries present. Switch position OFF is  
Battery Monitor On (Enabled), and Switch position ON is  
Battery Monitor Off (Disabled).  
WARNING:  
Undesired operation may result if the battery monitor is set  
to “Disabled” while this thermostat has batteries installed.  
9. COMPLETING THE INSTALLATION  
Once all hardware option settings are performed, install two  
new Energizer® or DURACELL® "AA" size alkaline batteries  
before continuing further. Ensure that the batteries are  
installed in the proper direction as per the markings shown  
in the battery tray. If batteries were already installed before  
setting changes were performed, simply change the  
Temperature Mode switch on the front panel to any other  
position so that the new settings may be recognized by the  
thermostat.  
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NOTE:  
When you are finished performing your installation and setup  
options, please remove the thin plastic film that is protecting  
the LCD display screen on the front of the thermostat. This  
plastic may or may not be present, and is evident by the  
appearance of fake digits appearing on the display screen.  
10. FRONT PANEL ITEMS  
RESET  
The RESET button is a small recessed push button that is  
located right above the NEXT button behind the front door.  
This button can be pushed with a pencil or the end of a  
paper clip. This reset returns the heating and cooling  
programs to their default Energy Star values, resets the filter  
counter, and all other user changeable software options to  
their default values. It is recommended that you write down  
your current heating and cooling program start times and  
temperatures prior to pressing the software reset button.  
MODE SWITCHES  
There are two mode switches on the front, a TEMPERATURE  
Mode switch and a FAN Mode switch.  
The TEMPERATURE Mode switch has three positions: HEAT,  
OFF, and COOL. In the winter, set the switch to HEAT to  
control your heating system. In the summer, set the switch  
to COOL to control your cooling system. In the spring and  
fall or when the windows are open, you can set the switch to  
OFF to prevent heating or cooling operation.  
The FAN Mode switch has two positions, AUTO and ON.  
Setting the Fan switch to AUTO automatically runs your  
system's blower fan as required, only during heating or  
cooling activation. Setting the Fan switch to ON, runs your  
system’s fan continuously, even if heating or cooling is not  
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needed. With the Fan switch in the ON position, the fan will  
operate even when the Temperature Mode switch is in the  
OFF position to provide air circulation only. When the fan is  
running, the word “FAN” is displayed in the temperature  
portion of the display screen.  
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).  
PUSH BUTTONS  
There are five primary push buttons on the front of the  
thermostat: The UP and DOWN arrow keys, the NEXT button,  
The HOLD button, and the COPY/EMER button.  
ROTARY DIAL  
The LUX Speed Dial® provides an easy way to quickly  
navigate between the different programming areas. This  
rotary dial has five individual positions and should always  
remain in the RUN position, unless a specific action is being  
performed in one of the other positions.  
11. OPERATING INSTRUCTIONS  
SET DAY/TIME  
Rotate the dial to the SET DAY/TIME position. You should  
see the word SET appear in the upper left corner of the  
display, along with the clock and a day of the week that is  
flashing. With the day flashing, press either the UP or  
DOWN buttons to make the current day flashing. Press the  
NEXT button; this should cause the time to start flashing and  
the day to remain on steady. Using either the UP or DOWN  
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buttons, adjust the clock to the current time, and make sure  
that the proper AM or PM indication is observed as  
appropriate. To assist with large adjustments, the clock  
digits will increment rapidly in either direction if the UP or  
DOWN buttons are held pressed for more than a few  
seconds.  
HEATING AND COOLING  
Basic operation of your heating or cooling system can be  
obtained by ensuring that the rotary dial is in the RUN  
position, and simply moving the Temperature Mode switch to  
either the HEAT or COOL position. Manual adjustment of the  
set temperature can be performed at any time by using the  
UP/DOWN buttons. While the words “SET TEMP” are being  
displayed, you are able to adjust the set temperature to any  
desired value within the normal operating range.  
Prior to being set initially with your custom temperature  
programs, the thermostat will follow the default Energy Star®  
approved temperature programs that are preset within the  
thermostat’s memory. A table of the default heating and  
cooling programs is shown below:  
PERIOD  
HEAT MODE  
COOL MODE  
MORN 6:00 AM 70 °F (21 °C) 6:00 AM 78 °F (26 °C)  
DAY  
EVE  
8:00 AM 62 °F (17 °C) 8:00 AM 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)  
WAIT ICON  
On the far right edge of the display screen, the words  
“WAIT” may show up flashing from time to time. This Wait  
indicator appears if there is currently a demand present for  
heating or cooling activation, but the minimum off time delay  
has not yet been satisfied. This provides protection for your  
heating and cooling equipment, but lets you know that the  
system will turn on shortly if it is required.  
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TEMPERATURE OVERRIDE  
A Temperature Override occurs in Run mode, in either Heat  
or Cool, anytime the user adjusts the set temperature to a  
value that differs from the stored program temperature for  
that day and time. When the thermostat is in an Override,  
the word “OVERRIDE” will appear in the temperature area of  
the display. The thermostat will temporarily maintain  
thermal control using this new set temperature, until the  
start time of the next program period is reached. At the start  
of the next program period, the set temperature will return to  
its programmed value for that period. To enter an Override  
in either Heat or Cool mode, push either the UP or DOWN  
buttons once and the set temperature will begin to flash.  
Push either the UP or DOWN buttons again to the new  
desired set temperature value. An Override may be cancelled  
at any time by rotating the dial, changing the Temperature  
Mode switch, or by initiating a Temperature Hold.  
TEMPERATURE HOLD  
A Temperature Hold is similar to an Override, but is used for  
maintaining a constant set temperature for a longer duration.  
Once a Hold is initiated, the thermostat will maintain the  
Hold set temperature indefinitely. A Temperature Hold may  
be used for days, weeks, or even months at a time. Press  
the HOLD button once to enter a Hold, and the word “HOLD”  
will appear in the temperature portion of the screen, along  
with the set temperature flashing. While the set temperature  
is flashing, press either the UP or DOWN buttons to adjust  
the desired set temperature value. To cancel a Hold, press  
the HOLD button once again, turn the rotary dial, or change  
the Temperature Mode switch position. If a power loss  
occurs while in a state of manual Temperature Hold, the  
thermostat will return to Temperature Hold and maintain its  
Hold set temperature after the power comes back on.  
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EMERGENCY HEAT (Heat Pump Configuration Only)  
While in normal Heat mode with the rotary dial 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 be shown in the temperature 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”  
second stage heat terminal (Auxiliary Heat) as the primary  
heating source. It may become too cold in some climates  
for a heat pump alone to provide adequate heating without a  
secondary heating device. As every heat pump has different  
operating characteristics, you should refer to your heat  
pump manufacturer's recommendations for when to disable  
the heat pump and run in Emergency Heat mode.  
NOTE:  
This special Emergency Heat mode of operation only exists if  
your System Mode hardware option is set to the HP (Heat  
Pump) setting.  
DISPLAY BACKLIGHT  
Any button press will illuminate the display screen for about  
12 seconds, even if the Keypad Lock is activated. Any  
button press, mode switch change, or dial change while the  
backlight is already illuminated, will reset the initial 12  
second timeout.  
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AIR FILTER MONITOR  
In systems that have a blower fan and air ducts, this feature  
is to assist you with proper maintenance and periodic  
replacement of the filter located in your heating or cooling  
system. The Air Filter Monitor counts the duration of filter  
usage that has occurred, since the last time the Filter  
Monitor has been reset. The Air Filter Monitor is for  
information only, and does not affect the operation of your  
heating or cooling equipment. When the filter usage  
duration has expired, the words “CHANGE FILTER” will  
appear at the bottom of the display as a reminder while in  
Run mode.  
To set and use the Air Filter Monitor, turn the dial to AIR  
FILTER. The display will show the amount of filter usage  
remaining. To reset the usage counter, or change the filter  
usage duration, press the NEXT button. “SET: FILTER DAYS”  
will be displayed on the screen, along with a number of  
days. The available settings are: OFF, 30, 60, 90, 120, 180,  
or 365 days. If your system does not have a filter, setting  
the value to OFF will prevent the “CHANGE FILTER” from  
showing up on the screen. Return the rotary dial to the RUN  
position when you are finished adjusting the Air Filter  
Monitor settings.  
12. ADVANCED FEATURES  
SWING AND OFFSET SETTINGS  
SWING: A thermostat works by turning your heating or  
cooling system on and off whenever the room temperature  
varies from the set-point temperature. The amount of this  
variation is called the swing. Your system should cycle on  
about 3 to 6 times per hour. A smaller swing number  
increases the number of cycles per hour, so the room  
temperature is more precise and constant. A larger swing  
number decreases the number of cycles per hour, but can  
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save energy in some cases. 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), and affects both  
heating and cooling. To change the Swing setting, ensure  
that the System Mode switch is in the OFF position and the  
rotary dial is in RUN. Press the HOLD button for at least 2  
seconds. The words “SET:” and “SWING” will appear on the  
screen with a single digit shown. 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.  
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70  
69  
68  
67  
66  
Cut-In / Cut-Out  
(1st Stage)  
70˚F Set  
Temperature  
Swing  
Setting=  
#2 (+/- 0.5˚F)  
Offset **  
Setting=  
4˚F degrees  
(2nd Stage) **  
Cut-In / Cut-Out  
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DEGREES (F)  
** = Only applies if a second  
heat stage is present  
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OFFSET: After the swing value has been accepted, the words  
“SET:” and “OFFSET” will be shown on the screen. This  
setting is shown as a number of degrees, and is similar in  
nature to the swing however it 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 disabled. A 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 cases where the second heating stage is costly to  
operate when compared to the first stage.  
USER TEMPERATURE CALIBRATION  
The internal temperature sensor in this thermostat is  
accurately calibrated at the factory and should not need to be  
adjusted. 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 this thermostat to  
another one or more, if multiple thermostats are used in the  
same home. To change the Temperature Calibration: ensure  
that the System Mode switch is in the OFF position, and the  
rotary dial is in RUN. Press the COPY/EMER button for at  
least 2 seconds. The words “SET:” and “CAL” will appear on  
the screen with a single temperature digit shown. Use the  
UP/DOWN buttons to change the number of degrees of  
adjustment. 0° degrees is the default value. Press the NEXT  
button to accept the setting.  
PROGRAMMABLE KEYPAD LOCK  
NOTE: The following examples use the default lock code of  
“0000”. If you have altered the lock code to use your own  
code, use that in place of “0000” in the following  
instructions.  
To prevent tampering with any of your settings, the front  
panel buttons and rotary dial can be locked out, requiring a  
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four-digit code to unlock them. You may use either the  
default lock code of “0000”, or your own code number (see  
“TO CHANGE THE LOCK CODE:”).  
TO LOCK THE THERMOSTAT: Ensure the rotary dial is in the  
RUN position. Press the NEXT button for at least 2 seconds.  
The words “ENTER CODE” will appear on the screen, above  
“0000”. Enter the correct code by using the UP/DOWN  
buttons to change the flashing digit, and the NEXT button to  
advance to the next digit. Press the NEXT button again for  
at least 2 seconds. A padlock should appear on the screen  
to confirm that the thermostat is now locked.  
TU  
DAY  
F
:
72  
5 36PM  
HEAT  
TO UNLOCK THE THERMOSTAT: Ensure the rotary dial is in  
the RUN position. A single press of any button will cause  
the words “ENTER CODE” to appear on the screen, above  
“0000”. Enter the correct code by using the UP/DOWN  
buttons to change the flashing digit, and the NEXT button to  
advance to the next digit. Press the NEXT button again for  
at least 2 seconds. The padlock should disappear, and the  
thermostat should now be unlocked.  
If you try to unlock the thermostat by entering a code that is  
not correct, a padlock and the digits “88:88” will flash on the  
screen and you will have to try again to enter the correct  
code. If a different lock code was used other than the  
default of “0000”, this will need to be entered by using the  
UP/DOWN buttons, and the NEXT button to advance to the  
next digit. Once the correct code is entered, press the NEXT  
button for at least 2 seconds. The padlock should disappear,  
and the thermostat should now be unlocked.  
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TO CHANGE THE LOCK CODE: First ensure that the  
thermostat is unlocked and the rotary dial is in the RUN  
position. Press the NEXT button for at least 2 seconds. The  
words “ENTER CODE” will appear on the screen, above  
“0000”. Now press the HOLD button for at least 2 seconds.  
The words “SET CODE” will appear on the screen, along with  
“0000”. Enter your desired code by using the UP/DOWN  
buttons to change the flashing digit, and the NEXT button to  
advance to the next digit. Press the NEXT button again for  
at least 2 seconds. Enter your new code to lock the  
thermostat, or you may wait for 12 seconds to exit  
automatically without locking the thermostat.  
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13. PROGRAMMING  
SET HEAT PROGRAM  
Rotate the dial to HEAT PROGRAM. You will be  
programming the heat periods for all seven days, one after  
the other starting with Monday. The first period is MORN.  
Using the UP and DOWN buttons, set the start time for this  
period, and then push the NEXT button to proceed. Now set  
the desired set temperature for the MORN period using the  
UP and DOWN buttons, and push NEXT to proceed. Now set  
the start time and set temperature for the DAY period,  
pushing NEXT after each to advance. Continue with these  
same steps to set the start time and set temperature for the  
EVE, and NITE program periods.  
When you are finished setting all four periods, you may  
continue pushing the NEXT button through all four periods of  
Tuesday, Wednesday, and so on. Once you have reached the  
Sunday NITE period, you have completed all of the heat  
programs. To review your entries, keep pressing the NEXT  
button through the four periods of every day, or turn the dial  
to RUN if you are finished.  
SET COOL PROGRAM  
Rotate the dial to COOL PROGRAM. You will be  
programming the cool periods for all seven days, one after  
the other starting with Monday. You will begin with the start  
time of the MORN period, and use the same procedures that  
were performed while setting the HEAT PROGRAM periods  
described above, using the NEXT button to advance through  
the values. Return the dial to the RUN position when you  
are finished.  
QUICK COPY FEATURE  
The Copy feature allows you to copy all of the program  
information from any one single day, to any other day. With  
the rotary dial in either HEAT PROGRAM or COOL  
PROGRAM, press the COPY button once. The words “COPY”  
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will appear on the screen, with one of the days flashing  
above. Using the UP/DOWN buttons, select the day that you  
want to copy from. Press the NEXT button once. Your  
“copy from” day should be on steady with the following day  
flashing. Use the UP/DOWN buttons to select the day that  
you would like to copy to. A single short press of the COPY  
button will perform the copy, and the flashing day will  
advance to the next following day. You may continue to  
perform short single presses of the COPY button to also  
copy to the remaining days, one after the other (certain days  
may be skipped by pressing the UP button to advance past  
them). To exit the Copy feature, and return to the  
programming screen, press and hold the NEXT button for  
more than 1 second.  
14. BATTERIES AND MAINTENANCE  
This thermostat can be powered by either two “AA” alkaline  
batteries, a 24VAC common wire from your heating or  
cooling system, or a combination of both. If you are using  
either batteries alone, or a combination of 24VAC system  
power with batteries as a backup, the batteries should be  
replaced AT LEAST once per year, or sooner if the “LOW  
BAT” battery symbol appears in the lower left portion of the  
display screen as shown below.  
TU  
DAY  
F
:
72  
5 36PM  
LOW BAT  
HEAT  
To replace the batteries in the thermostat, remove the  
thermostat’s body from the base plate attached to the wall by  
pressing the thumb latch at the bottom center of the unit and  
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swinging the body towards you, up and away from the base.  
Remove the used batteries from the battery tray and discard  
appropriately.  
Install two new Energizer® or DURACELL® “AA” size alkaline  
batteries into the battery tray. Observe the polarity markings  
shown in the battery compartment to ensure proper  
installation. When finished, hang the top of the unit by the  
tabs at the top corners of the base, and then snap the  
bottom of the unit into place. Do not use unnecessary force.  
If the body does not snap into place easily, remove the body,  
re-hang it from the tabs and try again.  
15. 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 night at  
answers to the most common technical questions, and also  
permits you to email your questions to our technical support  
staff at your convenience.  
16. WARRANTY  
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  
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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.  
TU  
DAY  
F
:
72  
5 36PM  
HEAT  
Mt. Laurel, New Jersey 08054, USA  

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