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3© COPYRIGHT 2004 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED
SETTING THE TIME AND DAY
To change
current day.
Move the Speed Slide to SET DAY/TIME position. You should see the display pictured
above with a day of the week flashing. When you are finished setting the day and time,
rotate the dial to RUN to return to normal operation or to another position to continue
programming.
CAUTION
The TX250 is protected against normal static electric discharges.
However, in extremely dry weather you should touch another metal
object before the TX250 to avoid potential loss of programs.
To change the
current time.
To set current time. The (e.g.
“12:00”) will be flashing.
The TX250 alternately displays the
current time and the room
temperature. It also displays the day of
the week and the currently active
program period that is controlling the temperature: MORN, DAY, EVE, or NITE.
The set point temperature will appear in the right side of the display. In the winter, set the
system switch to HEAT to control your heating system. In the summer, set the switch to
COOL to control your air conditioner. In spring and fall or when windows are open, you can
set the system switch OFF.
Setting the FAN switch to AUTO
automatically runs your system’s fan
during heating and cooling. Setting
the FAN switch to ON runs your
system’s fan continuously even without heating or cooling.
NOTE
The FAN switch works only if your system
provides a wire for the TX250’s “G” terminal.
•
Press UP/DOWN to change the current temperature
setting. The OVERRIDE indicator appears on display.
•
The OVERRIDE feature will be automatically canceled
at the start of the next program period.
•
To cancel OVERRIDE prior to next program period press
UP/DOWN until original set temperature
appears. OVERRIDE indicator will disappear from display.
PROGRAMMING THE TX250
You can change any preset times and/or temperatures to suit your schedules for the
weekday and weekend programs. Each period (Morning, Day,
Evening, and Night) is programmed for HEAT and for COOL.
HEAT
OFF
COOL
Select HEAT to program the
TX250 for controlling your heater.
To program temperature.
To change the start
time for MORN.
To move to DAY.
To change the temp.
setting for MORN.
To program temperature.
To change start time
for DAY.
To move to EVE.
To change the temp.
setting for DAY.
To program temperature.
To change the start
time for EVE.
To move to NIGHT.
To change the temp.
setting for EVE.
To program temperature.
To change the start
time for NIGHT.
Move Speed Slide to RUN position to
start the programs.
To change the temp.
setting for NIGHT.
Slide the Speed Slide to SET WEEKDAY PROGRAM. To program the weekends SET
WEEKEND. With Slide on SET WEEKDAY PROGRAM, you will see the display above.
TEMPORARY
TEMPERATURE OVERRIDE
TEMPERATURE OVERRIDE AND
TEMPERATURE HOLD
MO
PM
MO
DAY
OVERRIDE
PM
H
E
A
T
MO TU WE TH FR
MORN
AM
H
E
A
T
DOWN
UP
These features let you change the current
Set Temperature without changing the programs
stored in your thermostat’s memory.
OR Select COOL to program the
TX250 for controlling your air conditioner.
OPERATION
This thermostat is “armchair programmable”
You can make any program or setting
changes with the thermostat body off or on
the wall thermostat base.
NEXT
UP
DOWN
NEXT
UP
DOWN
NEXT
UP
DOWN
NEXT
NEXT
UP
UP
UP
DOWN
DOWN
NEXT
UP
DOWN
NEXT
UP
DOWN
NEXT
UP
DOWN
UP
DOWN
Push in the RESET key. This
sets the default heating and
cooling programs. To review the
default programs, move the Speed
Slide to SET WEEKDAY or
SET WEEKEND.
You can use the default
programs as shown, or change
them as you wish. Each day is
divided into four periods. Each
period has its own starting time
and temperature.
THE BUILT-IN ENERGY STAR
®
PROGRAMS
PERIOD HEAT COOL
WEEKDAYS
MORN 6:00 AM 70° 6:00 AM 78°
preprograms DAY 8:00 AM 62° 8:00 AM 85°
EVE 6:00 PM 70° 6:00 PM 78°
NIGHT 10:00 PM 62° 10:00 PM 82°
MORN 6:00 AM 70° 6:00 AM 78°
WEEKEND DAY 8:00 AM 62° 8:00 AM 85°
preprograms EVE 6:00 PM 70° 6:00 PM 78°
NIGHT 10:00 PM 62° 10:00 PM 82°
TEMPERATURE SWING
A thermostat works by turning your heating or cooling system on and off whenever the
room temperature 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. Setting “1” is
approximately 1/4°F. Each increase of 1 value increases the swing by approximately 1/4°F.
A larger swing number decreases the number of cycles, and may save energy in some
cases.
SWING SETTINGS
CHANGING FROM °F TO °C AND A 12HR CLOCK TO A 24HR CLOCK
TECHNICAL SERVICE
If you have any problems installing or using this thermostat, please reread the instructions carefully.
Technical Service is available through our Technical Service Number. If you require assistance, please
call our offices between 8:00 a.m. and 4:30 p.m. Eastern Standard Time, Monday through Friday.
The number is (856) 234-8803 or visit our online technical support at www.luxproducts.com.
WARRANTY
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 failure 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 participating retailer from which purchase was made, along with proof of
purchase. Please refer to Technical Service Section 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. only.
TEMPERATURE HOLD
MO
DAY
HOLD
PM
H
E
A
T
66
Speed Slide must
be in the run
position
Press together
ADVANCED FEATURES
SET TEMP SWING
To change
swing
• WARNING: Making these changes will
require you to reset the thermostat. Copy
any of your customized programs onto
the chart below. This will be your
reference to reenter the programs
afterwards.
• Located to the left of the circuit board
are three black jumpers C/F and 24/12H.
• To change to Celsius - remove jumper
- JP2.
• To change to a 24HR clock - remove
jumper- JP1.
• Press the reset key on the front of the
thermostat for changes to take effect.
• Reprogram as necessary.
JP3
GAS
ELEC
JP2
JP1
JP3
JP2
JP1
2MIN
C
24HR
5MIN
F
12HR
OPENCLOSE
Press to set.
• Press HOLD. Adjust temperature as
desired with UP/DOWN.
• Temperature setting will not change even
after next program period begins.
• To clear, press HOLD again.
HOLD
NEXT
NEXT
HOLD
UP
DOWN
5 MIN/2 MIN MINIMUM ON/OFF TIME
Your thermostat has an internal timer built in to protect your compressor. The timer forces
a minimum on/off time of 5 minutes. You may change this minimum on/off time to 2 minutes.
To accomplish this, remove the jumper labeled JP3. You must press the small reset
button on the face of the thermostat for the changes to take effect.
WARNING
Making these changes will require you to reset the thermostat. Copy any of your customized
programs onto the blank chart. This will be your reference to re-enter the programs afterwards.