background image

Push in the RESET key. This sets the

built-in heating and cooling programs.
To review the built-in programs,press
NEXT or PREVIOUS repeatedly; when
you are done, press RETURN.

You can use the built-in 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.

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. A larger swing number decreases the 
number of cycles, to save energy in most cases.

• 

The Unit can be

used with most

24 volt gas, oil or

electric heating

and air conditioning

systems, single-stage

heat pumps or gas

millivolt heating systems.

It cannot be used with 120
volt heating systems or
multistage heat pumps. Ask
your dealer for other LUX
thermostats to control
those systems.

• 

The Unit is programmable.

There are four programming
periods per day. Each
period can be programmed
separately.

• 

You can use the built-in

time/temperature

programs, or alter them

to suit your schedule.

The

Unit provides separate
programming for every day
of the week- for both heating and cooling. You can override the programmed temperatures for as
little as one programming period or for an entire vacation.

• 

In cool weather,

when the system switch is set to HEAT, the Unit will maintain cooler “set back”

room temperatures to save energy.  It will then change to warmer “comfort” settings —  all
automatically, at specified times during the day.

• 

In warm weather,

when the system switch is set to COOL, the Unit will maintain warmer “set

back” room temperatures to save energy. It will then change to cooler “comfort” settings - all
automatically, at specified times during the day.

• 

A large liquid crystal display

shows time, day of the week, and room and set temperatures.

It will remind you when the filter should be changed in your blower and track your system’s energy
usage. 

• 

Temperature swing adjustment

lets you fine-tune your system for maximum comfort and

economy. 

• 

5/2 Minute Selectable Minimum Run/Off Time

for Short Cycle/Compressor Protection.

Two Energizer® or DURACELL® “AA” alkaline batteries

(not included) are used to retain your

time and temperature programs.

LUX PRODUCTS CORPORATION • Mt. Laurel, New Jersey 08054  USA         

INSTALLATION

I M P O R T A N T !

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 procedures, 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.

READ

INSTALLATION

INSTRUCTIONS

FIRST

Please read all instructions carefully

before beginning installation.

TOOLS REQUIRED

#1 Phillips screwdriver (small)
Drill with 3/16-in. (4.8mm) bit

THERMOSTAT 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 install it where there are unusual heating conditions, such as: in direct 

sunlight; near a lamp, radio, television, radiator, register, or fireplace; near hot water pipes in a wall;
near a stove on the other side of a wall. 

3. 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. 

4. Do not locate in a damp area. This can lead to corrosion that will shorten thermostat life.
5. Do not locate where air circulation is poor, such as: in a corner or an alcove; or behind an open

door. 

6. Do not install the unit until all construction work and painting has been completed. 
7. This thermostat does not require leveling.

C A U T I O N

To avoid electrical shock and 

to prevent damage to the

furnace, air conditioner, and 

thermostat, disconnect the power

supply before beginning work. This

can be done at the fuse box, at the

circuit breaker, or at the appliance.

OFF

REMOVING THE OLD THERMOSTAT

Switch electricity to the furnace and air conditioner OFF; then
proceed with the following steps. 
1. Remove cover from old thermostat. Most are snap-on types and

simply pull off. Some have locking screws on the side. These
must be loosened.

2. Note the letters printed near the terminals. Attach labels

(enclosed) to each wire for identification. Remove and label wires
one at a time. Make sure the wires do not fall back inside the
wall.

3. Loosen all screws on the old thermostat and remove it from the

wall.

MOUNTING THE UNIT ON THE WALL

1. Strip insulation 3/8 in. (9.5mm) from wire ends and clean off any corrosion.
2. Fill wall opening with non-combustible insulation to prevent

drafts from affecting the thermostat.  

3. Press up on the button on bottom of thermostat and swing the

body away from the base and up to remove the body from the base.

C A U T I O N

Read instructions carefully

before removing any

wiring from existing 

thermostat. Wires must be

labeled before they are

removed. When removing

wires from their terminals,

ignore the color of the

wires since these may not

comply with the standard. 

C

A

U

T

I

O

N

Do not allow wires to touch each other or parts on thermostat. Wires must be

trapped between black spacer and brass terminal. Also, be sure to tighten securely

all 7 electrical terminal screws.

N O T E

If you are mounting the base to

a 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

location, and insert the plastic

anchors provided. Then mount

the base as described below.

FILTER USAGE MONITOR

The FILTER Monitor counts the hours since the filter in your blower was last changed. After 250

hours of use, FILTER will appear in the display. After you change the filter, set the thermostat’s FILTER
Monitor back to zero as follows.

C

A

U

T

I

O

N

• Your thermostat is a precision instrument. Please handle it with care. 

• Turn off electricity to the appliance before installing or servicing thermostat or any

part of the system. Do not turn electricity back on until work is completed. 

• Do not short (jumper) across electric terminals at control on furnace or air conditioner

to test the system. This will damage the thermostat and void your warranty. 

• All wiring must conform to local codes and ordinances. 

• This thermostat is designed for use with 24 volt and millivolt systems. The thermostat

should be limited to a maximum of 1.0 amps; higher amperage may cause damage

to the thermostat. If you are in doubt, call your utility company. 

TEMPERATURE CALIBRATION

SWING SETTINGS

PROGRAM LOCK

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 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 http://www.luxprod-
ucts.com. Our web site offers you answers to the most common technical questions, and also permits you to
email your questions to our technical support staff at your convenience. 

WARRANTY

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 acci-
dent, 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 par-
ticipating 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 conse-
quential 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.

THE BUILT IN

E

NERGY 

S

TAR

® 

PROGRAMS

PERIOD

HEAT

COOL

MON-SUN

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°

To change 
current day.

Open the drop down door on the front of the thermostat. Rotate the dial to the 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.

C

A

U

T

I

O

N

The unit is protected against normal static electric discharges.  However, in extremely dry weather you

should touch another metal object before the unit to avoid potential loss of programs.

To change the
current time.

To set current time. The (e.g.
“12:00”) will be flashing.

The Unit alternately displays the current time

and the room temperature. It also displays the
day of the week and the currently active pro-
gram period that is controlling the temperature: MORN, DAY, EVE, or NIght.

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. 

N

O

T

E

The FAN switch works only if your system 

provides a wire for the Unit’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 tem-
perature appears. OVERRIDE indicator will disappear from display.

PROGRAMMING THE UNIT

You can change any preset times and/or temperatures to suit your schedules for the weekday,

Saturday and Sunday programs. Each period (Morning, Day, Evening, and Night) is programmed for
HEAT and for COOL.

Select HEAT to program the 

unit 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.

To change the temp.
setting for NIGHT.

Rotate dial to SET WEEKDAY PROGRAM. To program SATURDAY or
SUNDAY, rotate the dial to SET SATURDAY or SET WEEKEND PRO-
GRAM. With dial on SET WEEKDAY PROGRAM, you will see this display.

TEMPORARY TEMPERATURE OVERRIDE

VACATION TEMPERATURE HOLD

TX9000a SERIES

SMART TEMP

®

ELECTRONIC THERMOSTAT

Complete, Easy To Read  Programming And Installation Instructions Inside

TEMPERATURE OVERRIDE AND TEMPERATURE HOLD

These features let you change the current Set Temperature without changing the programs stored in

your thermostat’s memory.

TEMP

TU

AM

MORN

HEAT

PROGRAM

FOR:

MO

WE TH FR

START AT:

SET TEMP

To change the FILTER Usage Monitor limit 

To reset the counter

Rotate the dial to FILTER

To disable the FILTER Usage Monitor set the limit to 0 hours

To change the limit from 0-500 hours

Rotate the dial to SET DAY/TIME

Press together

To adjust the thermostat

To prevent tampering with set programs. The sequence of keys to lock and unlock the program:

Hold for two seconds

Rotate the dial to SET ENERGY/USAGE

Press together

ADVANCED FEATURES

DOWN

UP

WIRING DIAGRAMS

To change the temp. swing between 1-9 (4= approx. ±1°F)

WARNING: Making these changes will require you to reset the thermostat. Copy any of your cus-

tomized programs onto the chart . This will be your reference to reenter the programs afterwards.

• 5/2 Minute Selectable Minimum Run/Off Time -J1.
• To change to Celsius - remove jumper -J2.
• To change to a 24HR clock - remove jumper- J3.
• Press the reset key on the front of the thermostat for changes to take effect.
• Reprogram as necessary.

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.

Select COOL to program the

unit 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.

• Press UP/DOWN

to set time.

TO SET TIME & DAY

• Rotate Dial to SET

DAY/TIME.

• Press UP to change

current day.

• Press NEXT.

TO SET PROGRAMS

• Rotate Dial to SET

WEEKDAY,
SATURDAY or
SUNDAY PROGRAM.

• Press UP/DOWN to adjust

start time.

• Press NEXT.
• Press UP/DOWN to adjust

temperature.

• Press NEXT.
• Repeat as needed or rotate

dial to RUN to stop Programming.

TEMPORARY TEMPERATURE OVERRIDE

•Press UP/DOWN to adjust set temperatur

PATENT NO. 5,673,850

e.

•To clear OVERRIDE press UP/DOWN until

original set temperature appears or wait for
the start tf the next period.

TEMPERATURE HOLD

• Press HOLD. Adjust temperature as

desired with UP/DOWN.

•To clear, press HOLD again.

SIMPLIFIED INSTRUCTIONS

The Active Program Period

Liquid Crystal 
Display

Fan
Switch

System
Switch

Easy to 
follow 
Instructions

LUX Speed 
Dial

®

Thermostat
Body

The Set 
Temperature

Thermostat 
Cover

Button to Light Display

HEAT

OFF

COOL

AUTO

ON

FAN

RESET

HOLD

NEXT

RUN

FILTER

SET

SUNDAY
PROGRAM

SET

SATURDAY
PROGRAM

SET

WEEKDAY
PROGRAM

SET

DAY/TIME

DOWN

UP

1500

Patents Pending

MO

DAY

HEAT

PM

SIMPLIFIED INSTRUCTIONS

• Press UP/DOWN to set time.

TO SET PROGRAMS

• Rotate Dial to SET
WEEKDAY

TEMPORARY TEMPERATURE OVERRIDE

•Press UP/DOWN to adjust set temperature.
•To clear OVERRIDE press UP/DOWN until
original set temperature appears or wait for
the start tf the next period

TO SET TIME & DAY

• Rotate Dial to SET
DAY/TIME.
• Press UP to change

td

HEAT

OFF

COOL

AUTO

ON

FAN

RESET

HOLD

NEXT

RUN

FILTER

SET

SUNDAY
PROGRAM

SET

SATURDAY
PROGRAM

SET

WEEKDAY
PROGRAM

SET

DAY/TIME

DOWN

UP

1500

Patents Pending

MO

DAY

HEAT

PM

SIMPLIFIED INSTRUCTIONS

• Press UP/DOWN to set time.

TO SET PROGRAMS

• Rotate Dial to SET

TEMPORARY TEMPERATURE OVERRIDE

•Press UP/DOWN to adjust set temperature.
•To clear OVERRIDE press UP/DOWN until
original set temperature appears or wait for

TO SET TIME & DAY

• Rotate Dial to SET
DAY/TIME.
• Press UP to change

DOWN

UP

MO

DAY

HEAT

PM

Choose Heat or Cool

Set Day & Time

Installs Easily

Easy as

1–2–3

INSTALLATION AND OPERATING INSTRUCTIONS

NEXT

UP

DOWN

NEXT

UP

DOWN

NEXT

UP

DOWN

NEXT

HOLD

NEXT

NEXT

HOLD

NEXT

NEXT

HOLD

NEXT

NEXT

UP

UP

UP

DOWN

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

UP

DOWN

NEXT

UP

DOWN

NEXT

UP

DOWN

NEXT

UP

DOWN

UP

DOWN

NEXT

NEXT

HOLD

C

A

U

T

I

O

N

Be careful not to drop the body or disturb electronic parts. 

Leave the cover closed while the body is being removed from the base.

TERMINALS

SCREW
ANCHORS

BASE

W3

L

R

Y

O

G

YW

RH

B

ORC

Attaching Wires

4. Hold the base against the wall, with the wires coming through wherever it

is convenient for wiring. Route the wires to below the terminal block.
Position the base for best appearance (to hide any marks from an old
thermostat). An optional wall plate is included for covering old mounting
holes. Attach the base to the wall with the two screws provided.

FEATURES

These diagrams below are provided for new installations or unreferenced wires. 

1. Remove fresh batteries from their carton. 
2. Remove body of thermostat as described at bottom of

first column.

3.  Remove the battery clip and batteries.
4.  Install two new Energizer

®

or DURACELL

®

"AA"

size alkaline batteries in the battery compartment.
Observe the polarity marking shown in the clip. 

5. Place body back on the wall. Hook the 

bottom of the body onto the base, swing the body up,
and snap the body onto the base.

Installation is now complete. Be sure to turn the power
back on to your heating and /or air conditioning system. If this is the first time you are installing batteries,
the thermostat will display “SUN 12:00 AM”. Within 90 seconds the thermostat will begin to display the
room temperature alternately with the time. To correct the display, see “Setting the TIME and DAY,” after
you set the programs. 

REPLACE BATTERIES WHEN

INDICATOR APPEARS

C A U T I O N

The Unit is protected against normal static

electric discharges.  However, in extremely

dry weather you should touch another

metal object before the Unit to avoid

potential loss of programs.

J4 J3 J2 J1

2 MIN

C

24 HR

S/R ON

5 MIN

F

12 HR

S/R OFF

J1
J2
J3
J4

N O T E

When replacing batteries, you have 

approximately 1 minute before programs are lost.

N O T E

If you have an electric system and the blower does not operate after installation, find the

electric/gas heat selector on the back of the body. Move the selector to the ELEC position.

OR

SETTING THE TIME OF DAY

N

O

T

E

You must press “RESET” after enabling the features below. This will require you to

reprogram your thermostat. Please copy your programs into the blank chart provided

to assist reprogramming. Please reference the figure under “INSTALLING BATTERIES”

which shows the JUMPER LOCATIONS

SMART RECOVERY

Your thermostat has the capability to turn the HEAT and AIR CONDITIONING 

ON

in your home so that it

reaches your desired comfort temperature at the time you have programmed. For instance, if you have pro-
grammed your thermostat for 70° at 5:00pm, normally the thermostat will begin to heat your home at 5:00pm.
With SMART RECOVERY on, the thermostat will calculate the best time to turn the heat on so that the temper-
ature in your home reaches 70° by 5:00pm. It calculates the amount of time through experience and will get
more accurate as time goes by. To enable SMART RECOVERY, remove J4 on the back of the thermostat. Press
the small reset button on the front of the thermostat. IN RECOVERY will appear in the display when this feature
is bringing your home to temperature.

The COPY button can be used to duplicate the

programs from any previous day.

Rotate dial to RUN position to start the programs or SET WEEKEND PROGRAM to continue
programming.

ENERGY USAGE MONITOR

A timer in the unit records your systems’s ON time for the current day, the previous day, and

cumulatively to let you see the effects of your temperature settings and weather conditions. 

• Select HEAT to monitor heating energy usage or COOL to monitor cooling usage. 
• Rotate the dial to SET ENERGY/USAGE

The current day’s ENERGY usage is displayed.

To reset the display to zero.

To display yesterday’s energy use.

NEXT

UP

To undo the previous reset to zero.

UP

To display total ENERGY usage since
the Monitor was last set to zero.

NEXT

Rotate the dial back to the RUN position.

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.

WARNING:

Use Energizer

®

or DURACELL

® 

Alkaline Batteries Only.

INSTALLING BATTERIES

The Unit requires batteries to operate your furnace and retain its
programming in memory. Replace the batteries when the
REPLACE indicator appears in the display or at least once a year.

HEATING ONLY SYSTEMS

C

OOLING ONLY SYSTEMS

4 -WIRES WITH ONE TRANSFORMER

5 -WIRES WITH TWO TRANSFORMERS

HEATING / 

C

OOLING SYSTEMS

HEATING / 

C

OOLING SYSTEMS

YO

G

W

B

RH RC

OPTIONAL F

AN WIRE

RC-RH JUMPER

PROVIDED

RH

R

C

R

V

5

G

F

W

H

4

YO

G

W

B

RH RC

RC-RH JUMPER

PROVIDED

RH

R

C

G

F

R

V

5

Y

C

*

6

YO

G

W

B

RH RC

RC-RH JUMPER

PROVIDED

RH

R

C

R

V

5

V

5

W

H

4

Y

C

*

6

G

F

YO

G

W

B

RH RC

RC-RH JUMPER

PROVIDED

*CUSTOMER

SUPPLIED

JUMPER

RH

R

C

R

Y

C

*

G

F

YO

G

W

B

RH RC

RC-RH JUMPER

REMOVED

RH

V

5

TYPI

C

AL SINGLE STAGE

HEAT PUMP WIRING

W

H

4

Y

C

*

6

G

F

R

C

R

O

B

USE B or O 

NOT BOTH

TYPICAL HOOKUP FOR 2 OR 3 WIRE

24 VAC HEATING SYSTEMS (AND MILLIVOLT)

Y

O

G

W

B

RH R

C

Gas

Valve

or

Heater

FAN

System

XFMR

RH-RC JUMPER

PROVIDED

OPTIONAL
FAN LEAD

COMMON

TYPICAL COOL HOOKUP

24 VAC SYSTEMS

Y

O

G

W

B

RH R

C

FAN

A/C

Comp.

System

XFMR

RH-RC JUMPER

PROVIDED

SYSTEM

COMMON

TYPICAL 24 VAC 4-WIRE HOOKUP

SINGLE STAGE HEAT AND COOL

Y

O

G

W

B

RH R

C

Gas

Valve

or

Heater

FAN

A/C

Comp.

System

XFMR

RH-RC JUMPER

PROVIDED

COMMON

TYPICAL 2-TRANSFORMER 24-VAC 5-WIRE HOOKUP

SINGLE STAGE HEAT AND COOL

Y

O

G

W

B

RH R

C

Gas

Valve

or

Heater

FAN

A/C

Comp.

Heat

XFMR

Cool

XFMR

RH-RC JUMPER

REMOVED

COMMON 2

COMMON 1

TYPICAL SINGLE-STAGE HEAT PUMP HOOKUP

Y

O

G

W

B

RH R

C

FAN

Heat Pump

Compressor

System

XFMR

Reversing

Valve

RH-RC JUMPER

PROVIDED

USE

B or O

NOT BOTH

SYSTEM

COMMON

WIRING DIAGRAM NOTES

(APPLIES TO ALL DRAWINGS)

• The DASHED lines are optional depending upon

your system type.

• Verify whether “C”, “X” or “B” wires are connected

to system common.

• If “B” and “O” are both present, it is likely that “B”

is a system common.

• If a “B” wire in your system is a common, then

connecting it to the “B” terminal may cause damage to
your system.

• If “Y” and “C” are both present, it is likely that “C”

is a system common.

52002

© COPYRIGHT 2006 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED

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