INSTALLATION AND OPERATING INSTRUCTIONS

INSTALLATION

Please read all instructions carefully before beginning installation. TOOLS REQUIRED #1 Phillips screwdriver (small) Drill with 3 16-in. (4.8mm) bit

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.

TX500b SERIES

SMART TEMP ELECTRONIC THERMOSTAT
MORN DAY EVE NIGHT PM MO H E A T

MORN DAY EVE NIGHT

H E A T PM

SET WEEKDAY PROGRAM

SET SUNDAY PROGRAM

FAN AUTO ON

HEAT OFF COOL

SET DAY/TIME

Patents Pending

SIMPLIFIED INSTRUCTIONS

TO SET TIME & DAY Rotate Dial to set DAY/TIME. TO SET PROGRAMS Rotate Dial to SET WEEKDAY TEMPORARY TEMPERATURE OVERRIDE P UP/DOWN t TO SET TIME & DAY Rotate Dial to set DAY/TIME.
TO SET PROGRAMS Rotate Dial to SET TEMPORARY TEMPERATURE OVERRIDE

Easy as 123

Installs Easily

Set Day & Time

Choose Heat or Cool
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.
Complete, Easy To Read Programming And Installation Instructions
LUX PRODUCTS CORPORATION Mt. Laurel, New Jersey 08054, USA
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.

I M P O RTA N T !

THE results from your investment, please read this manual and acquaint READ yourself with your purchase before installing your new thermostat. N ALLATIO Then follow the installation procedures, one step at a time. This INST S will save you time and minimize the chance of damaging the TION STRUC IN thermostat and the systems it controls. These instructions may contain information beyond that required for your particular instalFIRST.
lation. Please save for future reference.
LUX Speed Dial The Set Temperature Fan Switch System Switch
Thank you for your confidence in our product. To obtain the best
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.
REMOVING THE OLD THERMOSTAT
Switch electricity to the furnace and air conditioner OFF; then proceed with the following steps.

FEATURES

The TX500 can be used with most 24 volt gas, oil or electric heating and air conditioning systems or gas millivolt heating systems. It cannot be used with 120 volt heating systems or heat pumps. Ask your dealer for other LUX thermostats to control those systems. The TX500 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 TX500 provides separate programming for weekdays and weekends for both heating and cooling. You can override the programmed temperatures for as little as one programming period or for an entire vacation.
Liquid The Active Crystal Program Period Display
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.

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.

CAUTION

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 temperature. 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.
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 THETX500 ON THE WALL
TO SET TIME & DAY Rotate Dial to set DAY/TIME. Press UP to change current day. Press NEXT. Press UP/DOWN to set time.
Rotate the dial to the RUN position to close the door.
1. Strip insulation 38 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.

Thermostat Cover

Thermostat Body/Sub-base
In cool weather, when the system switch is set to HEAT, the TX500 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 TX500 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. 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. WARNING: Use Energizer or DURACELL Alkaline Batteries Only.
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.
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

W RH RC
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.

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.

N O T E

Latch Button Screw Anchors (2)
COPYRIGHT 2006 LUX PRODUCTS CORPORATION. ALL RIGHTS RESERVED

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). Attach the base to the wall with the two screws provided.
TYPICAL COOLING AND HEATING SYSTEM (4-WIRE)

G Y W RH RC

TYPICAL COOLING AND HEATING SYSTEM (5-WIRE)

FAN FAN

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 5 electrical terminal screws.

GAS VALVE

COOL COMP 24 VAC HEAT TRANSFORMER 110

Figure 10

COOL COMP
REMOVE JUMPER BETWEEN RH & RC
24 VAC HEAT TRANSFORMER VAC COOL TRANSFORMER

Figure 11

WIRING DIAGRAMS
INSTALLING BATTERIES/ MAINTENANCE
The TX500 requires two new Energizer or DURACELL "AA" size alkaline batteries to operate your furnace and retain its programming in memory. Replace the batteries when the LO BATT indicator appears in the display or at least once a year.
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.
DAY 1. Remove fresh batteries from their carton. EVE 2. Remove body of thermostat as described NIGHT LO at bottom of first column. 3. Remove the used batteries. 4. Install two new Energizer or DURACELL "AA" size alkaline batteries in the battery compartment. Observe the polarity marking shown in the compartment. Place body back on wall. 5. Place the body back on the wall. Hook the top of the body onto the base, swing the body down and snap the body onto the base.
REPLACE BATTERIES WHEN INDICATOR APPEARS

Heat Selector

ELECT GAS

Battery Compartment

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.

When replacing batteries, you have approximately 1 minute before programs are lost.

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 http://www.luxproducts.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.
These diagrams are provided for new installations or unreferenced wires.
TYPICAL HOOKUP FOR 2-WIRE 24V HEATING SYSTEM AND MILLIVOLT SYSTEM
TYPICAL HOOKUP FOR 3-WIRE HEAT SYSTEM IF THIRD WIRE IS FAN WIRE

WARRANTY

Limited Warranty: If this unit fails because of defects in materials or workmanship within three years of date of original purchase, LUX Products Corporation 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.
GAS VALVE 24 VAC TRANSFORMER OR THERMOPILE 110

Figure 8

24 VAC TRANSFORMER 110

Figure 9

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. The TX500 alternately displays the current time and the room temperature. It also displays the day of the week and the currently active control program 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 systems fan during heating and cooling. Setting the FAN switch to ON runs your systems fan continuously even without heating or cooling.
TEMPERATURE OVERRIDE AND TEMPERATURE HOLD
These features let you change the current Set Temperature without changing the programs stored in your thermostats memory.
TEMPORARY TEMPERATURE OVERRIDE
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.

H E A T

PM OVERRIDE
The FAN switch works only if your system provides a wire for the TX500s G terminal.
VACATION TEMPERATURE HOLD
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.
THE BUILT-IN ENERGY STAR PROGRAMS
Push in the RESET key. This sets the built-in heating and cooling programs. To review the built-in programs, rotate the dial to SET WEEKDAY PROGRAM or SET WEEKEND PROGRAM. 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. PERIOD WEEKDAYS preprograms MORN DAY EVE NIGHT MORN DAY EVE NIGHT HEAT 6:00 AM 70 8:00 AM 62 6:00 PM 70 10:00 PM 62 6:00 AM 70 8:00 AM 62 6:00 PM 70 10:00 PM 62 COOL 6:00 AM 78 8:00 AM 85 6:00 PM 78 10:00 PM 82 6:00 AM 78 8:00 AM 85 6:00 PM 78 10:00 PM 82

DAY EVE NIGHT

ADVANCED FEATURES

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.
SAT & SUN preprograms
The dial must be in the RUN position to close the door.

PROGRAMMING THE TX500

SWING SETTINGS
Press together Dial must be in the run position To change swing Press to set.
You can change any of the preset times and/or temperatures to suit your schedules for the weekday and weekend programs. Each day is divided into four periods: Morning, Day, Evening, and Night. Each period is programmed for HEAT and for COOL. A blank programming chart is provided below for you to record your temperature settings in that chart. Select HEAT to program the TX500 for controlling your heater. OR Select COOL to program the TX500 for controlling your air conditioner.

MO TU WE TH FR

H E A T AM
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, place the jumper labeled JP3 over both pins. You must press the small reset button on the face of the thermostat for the changes to take effect.
Rotate dial to SET WEEKDAY PROGRAM. To program the WEEKEND, rotate the dial to SET WEEKEND PROGRAM. With dial on SET WEEKDAY PROGRAM, you will see this display. To change the start time for MORN. To program temperature. To change the temp. setting for MORN. To move to DAY. To change start time for DAY. To program temperature. To change the temp. setting for DAY. To move to EVE. To change the start time for EVE. To program temperature. To change the temp. setting for EVE. To move to NIGHT. To change the start time for NIGHT. To program temperature. To change the temp. setting for NIGHT. Rotate dial to RUN position to start the programs.
CHANGING FROM F TO C AND A 12HR CLOCK TO A 24HR CLOCK
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 at the top center of the thermostat are two jumpers - C/F and 12/24. To change to Celsius - remove jumper - C/F. To change to a 24HR clock - remove jumper- 24/12H. Press the reset key on the front of the thermostat for changes to take effect. Reprogram as necessary.

RC RH W Y G

JP3 JP2 JP1
CLOSE OPEN 5MIN 2MIN C F 12HR 24HR

P R O G R A M M I N G

MON. THRU FRI.

C H A R T

SETTING THE TIME AND DAY

SU DAY

PERIOD
TIME MORN DAY EVE NIGHT MORN DAY EVE NIGHT

TEMP. TIME

C A U T I O N The TX500 is protected against normal static electric discharges. However, in extremely dry weather you should touch another metal object before the TX500 to avoid potential loss of programs.
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 flag pointing to 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. To change current day. To set current time. The time (e.g."12:00 AM") will be flashing. To change the current time.

SAT. and SUN.

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Lux TX500 Series Thermostat TX500 Series Lux Thermostat Manuals
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