C A U T I O N
Your thermostat is carefully calibrated at the factory, and will measure
temperature to within ±1°. However, you can adjust the reading of
Do not allow wires to touch each other or parts on thermostat.
Terminated wires must be trapped between black spacer and
brass terminal. Securely tighten all 8 electrical terminal screws.
Slide the MODE switch to OFF.
There are five options which are
set by jumpers on the rear of the
units circuit board. Four are set by
Press and hold the Up and Down buttons until the display shows a
single digit between +5F°(+3C°) and -5F°(-3C°).
J4 J3 J2 J1
A GROUP OF numbered jumpers.
Then the Up or Down buttons may be used to adjust the reading.
The display will return to normal operation after 4 seconds without
(FOR REFERENCE ONLY
J 1: The minimum run time
NOT SHOWN TO SCALE)
jumper J1 sets the minimum length
of time that the thermostat must
remain with Heat or Cool either on
or off before it will automatically
switch to the alternate On or Off state. This feature prevents short cycling,
and provides compressor protection for cooling units. Choices are 2 or 5
1. Remove fresh batteries from their carton.
2. Remove body of thermostat as described during installation.
3. Remove the used batteries if present.
4. Install two new Energizer® or DURACELL® "AA" size alkaline batteries in
the battery compartment. Observe the polarity marking shown in the
J 2: The temperature format: jumper selects whether your thermostat
displays temperatures in Celsius or Fahrenheit.
J 3: This Jumper determines whether the display will be horizontally or
J 4: This Jumper controls the “swing” or temperature variation in the
home. Using the smaller number results in more stable temperature, while
the wider setting is provided as a more energy efficient alternative. Users
of forced hot water systems may find the 0.25 setting more comfortable.
WARNING: Use Energizer® or DURACELL® Alkaline Batteries Only.
5. Place the body back on the wall.
6. Using a small Phillips screwdriver
press the RESET button which is
between the Up/Down arrow
button. Within 90 seconds the
thermostat will begin to display the
The table above is printed on the circuit board. To change the jumper
position, pull it straight off the pins it covers. Replace the jumper over one
or both pins as determined by your desired setting. To prevent its loss, a
jumper may be placed over one pin only for the open positions. After
settings have been changed, press the small unmarked RESET button on
the front of the thermostat for the changes to take effect.
N O T E
REPLACE BATTERIES WHEN “LOBAT” APPEARS IN THE DISPLAY
OR AT LEAST ONCE A YEAR.
Gas/Electric J umper: The fifth jumper enables or disables the
thermostats ability to control the system fan when in heat mode. It has
three pins. When used with a furnace, it should be positioned over the left
two pins. The furnace must then control the system fan. When used with
an electric heating system, it should be positioned over the right two pins
and the thermostat will provide power at its G terminal to activate the
If you have any problems installing or using this thermostat, please
reread the instructions carefully. Technical Service is available through our
Technical Assistance Dept. 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
For detailed instruction, see BATTERIES/MAINTENANCE to install
batteries at this time.
Limited Warranty: If this unit fails because of defects in materials or
workmanship within three years 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 three years 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 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. only.
Turn the power back on to your heating and/or air conditioning system.
Verify that the system and it’s 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 from the furnace and air conditioning units can be
heard while they are running. The rush of moving air should be heard
within a short time after either has been started.
N O T E
If you have an electric system and the blower does not operate after
installation, find the electric/gas heat jumper on the back of the body as
indicated in the following diagram. Move the jumper from the center and
right pins, to the center and left pins.
The Installation is now complete.