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FEATURES  
Complete, Easy To Read  
INSTALLATION AND  
OPERATING INSTRUCTIONS  
5
PSP300 SERIES  
SMART TEMP® ELECTRONIC THERMOSTAT  
2
43383-05  
LUX PRODUCTS CORPORATION  
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Mt. Laurel, New J ersey 08054, USA  
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I M P O R T A N T !  
Please read all instructions carefully before  
beginning installation.  
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Save them for future reference.  
W A R N I N G :  
FOR USE ONLY WITH AIR CONDITIONERS AND  
SPACE HEATERS THAT AUTOMATICALLY  
RESTART COOLING OR HEATING OPERATION  
AFTER POWER RECONNECTION  
1. ON/OFF SWITCH  
4. HEAT/COOL SWITCH  
2. SOFT TOUCH BUTTONS 5. EXTERNAL TEMPERATURE  
3. LUX SPEED DIAL®  
SENSOR  
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Heating and Cooling  
Electronic  
Programmable  
Separate Programs for  
Heating and Cooling  
Armchair Programming  
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 before installing your  
new thermostat. Then follow the installation pro-  
cedures, one step at a time. This will save you  
time and minimize the chance of damaging the  
thermostat and the systems it controls. These  
instructions may contain information beyond that  
required for your particular installation. Please  
save for future reference.  
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Easy Programming with LUX  
Plugs into normal 110 Volt 15  
Speed Dial® (Patent # 5,673,850)  
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Amp Electrical Outlet  
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Battery Free Nonvolatile  
5/2 Day Programming  
Memory For All Programs And  
Settings  
(Weekdays and Weekends can  
be different)  
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ETL Approved  
User Calibration  
On Screen Low Battery  
Energy Star Compliant  
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Default Energy Star  
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Approved Program  
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Indicator  
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Positive On/Off Switch  
Easy to Install  
4 Periods Per Day  
120VAC Powered with  
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F/C Temperature Display  
Soft Touch Buttons  
2 Minute Short Cycle  
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Protection  
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Batteries  
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Adjustable Temperature differ-  
2 G13A size 1.5V Alkaline  
COMPATIBILITY  
ential/Cycle Rate (#1 thru #9)  
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Button Cell Batteries Included  
(For Clock Only)  
1 Year Warranty  
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Temporary and Constant  
Your PSP300 Programmable Outlet Thermostat  
is compatible with 120Volt, 15 Amp Plug, 60 Hz  
Window Air Conditioning Units and Portable  
Space Heaters only. It cannot be used with typi-  
cal 24 V systems, hydronics systems, or heat  
pumps. Ask your dealer for other LUXPRO®  
thermostats to control those systems.  
Temperature Override  
ELECTRICAL RATINGS  
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120V/60 Hz  
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Maximum load is 15 Amps at 120 Volts  
Power Consumption 2 W (maximum)  
Plug and Receptacle NEMA 5-15R (normal household 15 Amp  
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receptacle)  
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W A R N I N G S :  
INSTALLATION  
TOOLS REQUIRED: Small regular screwdriver  
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Read all instructions before using this ther-  
mostat.  
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To reduce the risk of electric shock, this  
product has a grounding type plug that has a  
third (grounding) pin. This pin will only fit into a  
grounding type power outlet. If the plug does  
not fit into the outlet, contact a qualified electri-  
cian to install the proper outlet. Do not change  
the plug in any way.  
LOCATION:  
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Do not locate where air circulation is poor,  
such as in a corner or an alcove; or behind an  
open door.  
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Do not install it where there are unusual heat-  
ing 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 the wall.  
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Do not use Outdoors.  
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Do not use in a bathroom. Never locate  
where it may fall into a bathtub or other water  
container.  
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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 win-  
dow.  
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Do not insert or allow foreign objects to enter  
any openings as this may cause electric shock,  
fire, or damage to the thermostat.  
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Do not locate in a damp area. This can lead  
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to corrosion that will shorten thermostat life.  
Do not use in areas where gasoline, paint,  
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Do not install the unit until all construction  
flammable liquids are used or stored.  
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work and painting has been completed.  
Space Heaters can be dangerous if used  
improperly. Be sure to follow all the Warnings  
and Cautions that came with the instruction  
manual written by the manufacturer of the  
Space Heater.  
PREPARING THE UNIT  
1. The PSP300 comes with (2) G13A size 1.5V  
Alkaline Button Cell Batteries already installed.  
These batteries power the clock only during nor-  
mal operation. They also provide backup power  
to retain the thermostats programs and settings  
while it is not plugged into the wall. In order to  
"activate" them, you must remove the black rib-  
bon from between the two batteries prior to  
using it. Use a small regular screwdriver to pry  
open the battery holder and pull out the black  
ribbon.  
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Avoid the use of an extension cord because  
the extension cord may overheat and cause  
risk of fire. However, if you have to use an  
extension cord, the cord should be a 3-wire,  
grounding type, with No. 14 AWG minimum  
size and rated not less than 1875 Watts.  
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Use this thermostat only as described in this  
manual. Any other use not recommended by  
the manufacturer may cause fire, electric  
shock, or injury to persons.  
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Never clean this thermostat while it is  
plugged in. Turn On/Off switch to Off, pull out  
of the wall, and then clean by using a rag only.  
EXTERNAL  
TEMPERATURE  
SENSOR  
SCREWDRIVER  
C A U T I O N S :  
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Your thermostat is protected against normal  
static electric discharges. To minimize the risk  
of damaging the unit in extremely dry weather,  
touch a grounded metal object before touching  
your thermostat.  
BATTERY PANEL  
RIBBON  
BACK OF UNIT  
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Be careful not to drop the unit or disturb  
electronic parts.  
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2. When you have the black ribbon out, simply push the  
battery compartment back in while lining up the arrows.  
3. On the back of the  
OPERATING BASICS  
EXTERNAL TEMPERATURE  
PSP300, there is an  
SENSOR  
RUN MODE  
External Temperature  
For the thermostat to function, the dial on the face of  
the thermostat must be turned to the RUN position. If  
you forget to do this, it will not work and the door will  
not close all the way.  
Sensor that looks like  
an antenna. Pull this  
ON/OFF SWITCH  
sensor out of its clip  
and bend the wire so  
that it point straight up.  
This is required for  
accurate temperature  
control.  
4. On the upper right  
side of the unit, there is  
an On/Off switch.  
Place this switch in the  
OFF position for right  
now.  
UP/DOWN CHANGE KEYS  
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These are the two upper keys, just right of the unit’s  
display. They are used to adjust set temperatures, and  
make other setting changes.  
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Pressing these keys once will adjust a setting one  
step in the associated direction.  
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If there are many choices for a value, usually that set-  
ting will advance while holding one of these keys. Some  
settings though, must be changed one press at a time.  
SET DAY AND TIME  
MOUNTING  
To set the correct time after the unit has lost power or  
after reset:  
1. Open the door on the front of the thermostat by lifting  
up the bottom of the door.  
2. Rotate the dial to SET DAY AND TIME.  
The abbreviation for the day of week will flash.  
W A R N I N G :  
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If any plugs do not fit into the receptacle that you  
are trying to plug into, Stop, the PSP300 is not  
designed for this application.  
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If the cord you are plugging into the PSP300 only  
has 2 prongs, STOP, not having  
a ground wire is unsafe. Your  
Window Air Conditioner or Spacer  
Heater must have a plug with 3  
prongs on it.  
W
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5. Plug the PSP300 straight into a 110 Volt electrical out-  
let on the wall nearest your Air Conditioning Unit or  
Space Heater.  
6. Plug in the electrical cord from your Window Air  
Conditioner or Space Heater directly into the front of the  
PSP300.  
COMPLETING YOUR INSTALLATION  
7. Configure your thermostat at this time. Refer to  
OPERATING INSTRUCTIONS.  
8. Turn the ON/OFF switch on the upper right side to the  
ON position.  
9. Turn on your Air Conditioner or Space Heater and turn  
the thermostat all the way up. (This will allow the  
PSP300 to control the room temperature and maintain a  
specific temperature)  
3. Use the UP key to advance to the current day.  
4. Press NEXT to adjust the time. Time will flash.  
5. Use the UP/DOWN keys to set the time.  
6. Pressing NEXT again will toggle from Set Time to Set  
Day, or vice versa.  
7. Return the dial to its RUN position.  
TEMPERATURE CONTROL MODES  
When a unit has first been powered up with the dial in  
the RUN position, your thermostat will begin to control  
your heating and/or air conditioning system according to  
it's default ENERGY STAR® approved program. There is  
a 2-position slide switch to change temperature control  
modes. Slide the switch to the mode you would like to  
use.  
10. Verify that the Window Air Conditioner or Space  
Heater and its fan are operating properly. When set to a  
high temperature, the heating system should provide  
warm air after a short time. Likewise, a cooling system  
should provide cool air after a short time. Usually sound  
can be heard while they are running. The rush of mov-  
ing air should be heard within a short time after either  
has been started.  
11. Your installation is now complete.  
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HEAT  
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Use HEAT mode to warm your home with a Space  
PROGRAMMING  
Heater.  
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In HEAT mode, HEAT is displayed right of the set  
temperature.  
EDITING HEAT OR COOL PROGRAMS  
COOL  
The PSP300 provides two separate programs, one for heat-  
ing and the other for cooling. Each program has separate  
settings for weekdays and weekends. Every day a program  
cycles through four independent periods. You can use the  
default programs or alter them to suit your schedule.  
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Use COOL mode to control your Window Air  
Conditioner, cooling your home.  
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In COOL mode, COOL is displayed right of the set  
temperature.  
ON/OFF SWITCH  
DEFAULT TEMPERATURE PROGRAM  
As supplied from the factory, the following ENERGY STAR®  
approved program will be used for temperature control in  
RUN MODE. This program and all other software settings  
may be restored to their default values via a SOFTWARE  
RESET.  
Slide the SLIDE switch to OFF when no heating or  
cooling is desired. Heating and cooling will be disabled,  
even though the set temperature, room temperature,  
and time will still be in the display.  
DEFAULT PROGRAM  
As supplied from the factory, your thermostat will use  
its default ENERGY STAR® approved program for tem-  
perature control. This program and all other settings  
may be restored to their default values via a SOFTWARE  
RESET. Please refer to DEFAULT TEMPERATURE PRO-  
GRAM for program times and temperatures.  
PERIOD  
Morning 6:00 AM 70°F (21°C) 6:00 AM 78°F (26°C)  
Day 8:00 AM 62°F (17°C) 8:00 AM 85°F (30°C)  
Evening 6:00 PM 70°F (21°C) 6:00 PM 78°F (26°C)  
Night 10:00 PM 62°F (17°C) 10:00 PM 82°F (28°C)  
HEAT MODE  
COOL MODE  
HOLD  
Hold is the simplest method to maintain fixed set tem-  
peratures.  
WEEKDAY PROGRAMMING  
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Press HOLD once to enter the temperature HOLD  
To change the HEAT or COOL program:  
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while in RUN or OVERRIDE. HOLD will be displayed on  
Set to HEAT if you are using a Space heater.  
Set to COOL if you are using a Window Air  
the bottom of the display.  
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Pressing this button again will toggle HOLD off and  
Conditioner  
return the unit to RUN and the programmed set temper-  
ature.  
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Rotate dial to SET WEEKDAY PROGRAMS.  
MORN, Mo, Tu, We, Th, Fr will be displayed, with the  
Start Time flashing.  
Programming is performed in the following order.  
1. Weekday Morn Start Time  
2. Weekday Morn Set Temperature  
3. Weekday Day Start Time  
4. Weekday Day Set Temperature  
5. Weekday Eve Start Time  
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Changing system mode or rotating the SPEED DIAL  
will also cancel a HOLD.  
TEMPERATURE OVERRIDE  
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OVERRIDE allows you to change the current SET  
TEMPERATURE in HEAT of COOL until the next pro-  
gram period without changing your temperature control  
programs.  
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Press an arrow key once.  
While the Set Temperature is flashing; press an UP or  
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6. Weekday Eve Set Temperature  
7. Weekday Nite Start Time  
DOWN key to adjust the set temperature by one degree  
in the associated direction. Holding the key will auto-  
matically advance the setting in the associated direction.  
8. Weekday Nite Set Temperature  
9. . . . and so on until Fri Nite is fully programmed at  
which point pressing NEXT again will begin the list at  
Mo - Fri Morn Start Time.  
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The OVERRIDE will be canceled at the start of the  
next program period, and the temperature setting will  
return to its programmed value.  
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Use the UP/DOWN keys to change the start time for  
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An OVERRIDE may be terminated by rotating the dial,  
this period. Press UP/DOWN buttons to change the  
time in 15-minute increments. Hold UP/DOWN button  
to change the time at a faster rate.  
switching the mode to OFF, or initiating a Hold.  
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Adjusting the set temperature to its program value will  
also cancel an OVERRIDE.  
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One period ends at the start time of the next period.  
SOFTWARE RESET  
The end of one period may not be any closer to the  
beginning of the next period than one 15-minute incre-  
ment. Moving a start time too close to the next start  
time results in the latter time being pushed ahead too.  
Press NEXT to accept the displayed start time and  
advance to the SET TEMPERATURE, it will flash to show  
that it may be edited.  
Use this feature to make all settings and programs  
return to their default values. Press and release [RESET]  
button using a pen or pencil. It will perform a system  
check and then returns all settings to their original  
default values before initiating normal operation.  
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The SET TEMPERATURE will be displayed on the  
right side of the display with the HEAT or COOL indica-  
tor visible (depending on which mode you have it in)  
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Edit the SET TEMPERATURE, then press NEXT to  
accept and advance to the next period.  
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When all the periods for the weekdays have been set,  
the start time for the next weekday Morning period will  
be displayed to begin editing the settings for that day.  
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Complete programming for all weekdays and rotate  
the dial back to RUN to accept all current values and  
end the programming session.  
WEEKEND PROGRAMMING  
Weekend programming is identical to weekday pro-  
gramming except that you must rotate the dial to SET  
WEEKEND PROGRAMS and the days that you will  
program are Sa and Su together. This two day program  
will repeat.  
NOTE: Pressing this button will overwrite your  
program and install the default values of all  
temperature programs and setup values into the  
unit's nonvolatile memory. To ease reprogram-  
ming later, record your thermostat's programs  
and settings in the table provided at the page  
bottom before using this button.  
ADVANCED FEATURES  
CALIBRATION OFFSET  
TEMPERATURE VARIATION / SWING  
Your thermostat works by turning your heating or  
cooling system on and off whenever the room temper-  
ature varies a certain number of degrees from the set-  
point temperature. This variation is the "swing". Your  
system should cycle on about 3 to 6 times per hour. A  
smaller swing number increases the number of cycles,  
so room temperature is more constant. A larger swing  
number decreases the number of cycles, saving ener-  
gy in most cases.  
Your thermostat is accurately calibrated at the factory  
to within + 1°F. An offset value up to +5°F may be  
added to the temperature value that the thermostat  
measures. This may allow you to match this thermostat  
to another.  
To change this offset from its default value of 0:  
1. Open the door on the front of the thermostat.  
2. Rotate the dial to SET DAY/TIME.  
3. Simultaneously press NEXT and HOLD. The  
Temperature Offset value will flash.  
SWING ADJ USTMENT  
This setting controls when the heating or cooling  
turns on and off.  
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The Swing setting sets the temperature variation the  
system allows above or below the set temperature  
before turning on the heating or Cooling. To change  
this value:  
1. Rotate the SPEED DIAL® to RUN.  
2. Press NEXT and HOLD simultaneously. The  
Temperature section of the display shows a single digit  
number between 1 and 9.  
4. The default value is 0 and in most cases should  
remain untouched.  
5. Use the UP/DOWN keys to adjust the offset value.  
6. Return the dial to its RUN position to accept the new  
value.  
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TECHNICAL ASSISTANCE  
If you have any problems installing or using this thermostat,  
please reread the instructions carefully. Answers to many  
questions can be found in our online technical support at  
www.luxproproducts.com If you feel you require assis-  
tance, please call our offices between 8:00 a.m. and 4:30  
p.m. Eastern Standard Time, Monday through Friday.  
Our number is (856) 234-8803 or you can email us directly  
at: techsupport@luxproproducts.com  
3. Select one of the 9 values the UP/DOWN buttons.  
4. [1] is the maximum comfort setting (narrow control).  
[9] is the maximum energy savings setting (wide control).  
5. Press NEXT  
TEMPERATURE DISPLAY FORMAT  
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This feature allows you to display temperature in either  
degrees C or degrees F.  
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WARRANTY  
To toggle the display mode from Fahrenheit to Celsius or  
vice versa press and release [NEXT] and [HOLD] simultane-  
ously in <SET WEEKDAY PROGRAMS> position.  
Limited Warranty: If this unit fails because of defects in  
materials or workmanship within one year of date of original  
purchase, LUX will, at its option, repair or replace it. This  
warranty does not cover damage by accident, misuse, or fail-  
ure to follow installation instructions. Implied warranties are  
limited in duration to one year from 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 dealer  
from which purchase was made, along with proof of pur-  
chase. Please refer to Technical Assistance before return-  
ing thermostat. Purchaser assumes all risks and liability for  
incidental and consequential damage resulting from installa-  
tion and use of this unit. Some states do not allow the exclu-  
sion 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. only.  
BATTERIES/ MAINTENANCE  
The PSP300 comes with (2) G13A size 1.5V Alkaline Button  
Cell Batteries. During normal use, these batteries are used  
for the clock only. However, they also serve as backup  
power to retain your programs and settings if you unplug it  
from the wall. These (2) batteries will need to be changed  
once every year. The thermostat will alert you when the bat-  
teries are low by displaying "LO BATT" in the display.  
BATTERY INSTALLATION  
1. Remove fresh batteries from their carton.  
2. Remove the thermostat from the electrical outlet.  
3. Use a small regular screwdriver to remove the battery car-  
tridge from the back of the thermostat. Use the small regular  
screwdriver to remove the 2 batteries from the holder.  
PROGRAMMING CHART  
The chart below is provided for you to write down your exist-  
ing Weekday and Weekend program times and temperatures  
in case you have to enter them again at a later time.  
DAY  
PERIOD  
HEAT  
COOL  
TIME  
TEMP.  
TIME  
TEMP.  
MON.  
THRU  
FRI.  
MORN  
DAY  
EVE  
NIGHT  
MORN  
DAY  
4. Remove the used batteries if present and replace them  
within 90 seconds to avoid having to reset the day and time.  
5. Install two new G13A size 1.5V Alkaline Button Cell  
Batteries batteries. Observe the polarity marking (pictures)  
shown on the battery cartridge.  
SAT.  
and  
EVE  
SUN.  
NIGHT  
6. Push the battery compartment back into the PSP300 while  
lining up the arrows.  
7. Plug the thermostat back into the wall.