LUX TX700U Universal Thermostat Instruction Manual

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FRONT PANEL CONTROLS:  

PRODUCT INSTALLATION MANUAL  

HEAT / OFF / COOL, SYSTEM MODE SWITCH: Set this switch to HEAT to control your heating system,  

and COOL to control your cooling system. The OFF position will disable both the heating and cooling  

units.  

53596  

TX700U Universal Thermostat  

(7-Day or 5/2-Day Programmable,  

or Non-Programmable)  

AUTO / ON, FAN MODE SWITCH: When in AUTO, the blower fan (if present in your system) will cycle on  

and off only while heating or cooling. In the ON position, the blower fan will run constantly at all times  

with or without a demand for heating or cooling.  

MULTI-FUNCTION, SET SLIDE SWITCH: This provides easy access to common settings, and should  

always remain in RUN unless a specific item is being adjusted. NOTE: when thermostat is set to  

“Manual” non-programmable mode, all 4 switch positions will act like RUN, except the “AIR FILTER”  

position.  

Lux Products Corporation  

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www.luxproducts.com  

®

®

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 Procter & Gamble Company  

UP / DOWN BUTTONS: The UP and DOWN buttons are used to control the set temperature, or adjust any  

other on-screen items. Typically, an item that is flashing can currently be adjusted.  

IMPORTANT!  

HOLD BUTTON: This button activates and deactivates the manual Temperature Hold feature, which  

maintains a fixed set temperature indefinitely without following a program routine.  

• Label every wire terminal designation on your existing thermostat wiring before removing  

your old thermostat.  

• Ignore the color of the wires since they may not comply with any standard. Please  

connect wires using the terminal letter designations.  

EMER BUTTON: For Heat Pump systems: this button activates Emergency Heat mode and prevents the  

outdoor unit from running. For conventional (non-Heat Pump) systems, this button will have no effect in  

Normal RUN mode.  

SYSTEM COMPATIBILITY:  

NEXT BUTTON: This is used when setting items such as software options, and temperature programs.  

When items on the screen are flashing during adjustments. Pressing the NEXT button will cycle through  

which item is flashing.  

This thermostat can be used with most 24 volt: gas, oil, Millivolt, electric heating and cooling systems,  

including heat pumps with an aux/emerg heat element.  

It cannot be used with: 120/240 volt heating elements (without a transformer), or on heat pumps that  

have two compressor stages (Y2). Ask your dealer for other LUX thermostats to control those systems.  

SYSTEM CONFIGURATION AND SETUP OPTIONS:  

INSTALL BATTERIES INTO THERMOSTAT: Install two brand new Energizer^® or DURACELL^® “AA” size  

alkaline (only) batteries, into the thermostat’s battery compartment. Ensure the batteries are installed  

in the proper direction.  

CAUTIONS AND WARNINGS:  

• The thermostat requires batteries to operate and failure or sub-standard performance of the batteries  

may impair or prevent the correct operation of the thermostat. Use Duracell^® or Energizer^® alkaline  

batteries ONLY for all LUX thermostats requiring batteries. BE SURE TO CHANGE THE BATTERIES AT  

LEAST ONCE A YEAR, or whenever you see the LO BATT indication on the screen. Failure to follow  

these battery instructions could result in property damage and/or personal injury.  

Setup options for how the thermostat will function, along with choosing your particular system type, are  

performed using a menu on the display screen.  

TO ACCESS THE SETUP MENU: Move the System Mode switch into the OFF position, and then hold  

down the EMER button for approximately 5 seconds until the screen changes. The menu will always  

start with item #1, and is advanced to each following item by a single press of the NEXT button. The  

options for each item are changed using the UP or DOWN buttons.  

• The electrical rating for this thermostat is 1.5 Amps per terminal, with a maximum total load of 3.0A  

for all terminals combined.  

• The thermostat contains parts that may wear out through use and are susceptible to failure if over-  

loaded or used in a manner other than as indicated in the documentation.  

ITEM #01 (CLK = CLOCK FORMAT): [12Hr, default] This displays the clock times using standard AM  

and PM values. [24Hr] This displays the clock times using the military-time format (example 22:00  

hours, without using AM or PM).  

• Check unoccupied residences regularly to ensure that all systems are operating properly.  

• Check any heating/air-conditioning system including this product before operation and at regular  

intervals.  

ITEM #02 (TMP = TEMPERATURE SCALE): [F, default] Shows all temperature values in Fahrenheit.  

• Electrical interference, static electricity, failure or substandard performance of batteries, wiring  

defects in the installation and/or characteristics of the connected HVAC devices may prevent the  

system from regulating heating and cooling as anticipated.  

[C] Shows all temperature values Celsius.  

ITEM #03 (PROGRAMMING STYLE): [5/2-Day] This style uses a weekday program routine for Monday,  

Tuesday, Wednesday, Thursday, Friday, and a separate weekend program routine for Saturday and  

Sunday. [7-Day, default] This style uses a separate program routine for each of the 7 days in the week.  

[Manual Non-Programmable] In this setting, there are no program routines for the thermostat to follow  

and the temperature control will be set only by the UP and DOWN buttons on the front panel.  

• The thermostat is a sensitive device and dropping the product can cause damage to critical  

components. If the product is dropped or shaken violently during transport or installation then it  

should be replaced immediately.  

• Persons with physical or mental limitations may not be able to promptly respond to a malfunction of  

the heating/air-conditioning system.  

ITEM #04 (PERD = PERIOD QUANTITY): [4P, default] Thermostat uses four periods per day (called  

MORN, DAY, EVE, and NITE). [2P] The thermostat uses two periods per day (called DAY and NITE).  

• All residents should be made aware of the potential in any system for malfunctions that could cause  

continuous heating or cooling and should be familiar with the operation and location of the  

heating/cooling appliance on/off switch.  

ITEM #05 (RCV = EARLY RECOVERY): [OFF, default] Program Set Temperature values start to occur at  

exactly the period start times. [ON] Early Recovery affects how the transition occurs when changing  

from the NITE to the MORN period, and when changing from the DAY to the EVE period. The thermostat  

calculates how long it takes for your home to recover from a setback on a daily basis, and turns on  

ahead of time in order to reach the target set point of the next upcoming program period by the period’s  

start time. While in a recovery, the word “RECOV.” will be shown on the display screen.  

• Read the instruction manual completely before installing the thermostat. A more detailed product  

manual is available on our www.luxproducts.com website. You should consult a qualified HVAC  

technician or an electrician if you do not fully understand the installation instructions.  

ITEM #06 (SYSTEM MODE): [FURN, default] This is for the majority of heating systems that are not Heat  

Pumps, such as a gas furnace or hot water boiler. [HP] Use this setting if you have a Heat Pump  

system, which uses the outdoor unit as the primary heat source and may also contain an electric  

heating element as a backup heat source. When set to “HP”, ensure that you have also set the  

Gas/Electric circuit board option to “ELEC”, as described in the “COMPLETE THE INSTALL” section.  

REMOVAL OF OLD THERMOSTAT:  

1. Turn OFF the electricity to all heating and cooling components. Do not turn the electricity back on  

until all work is completed.  

2. Write down the letters printed near each wire terminal that is used, and also the color of each wire  

that is connected to it. Self-adhesive wire labels are also enclosed.  

3. Carefully remove the wires one at a time, and bend them in a manner so that they do not fall back  

inside the wall. Do not allow bare wire ends to touch each other.  

ITEM #07 (DLAY = DELAY TIME): [5, default] Thermostat waits 5 minutes before turning the system  

back on after it was last run. This internal delay prevents rapid cycling and provides equipment  

protection. The 5 minute setting is fine for most applications. [2] Same operation as above but  

reduced to 2 minutes between state changes.  

ITEM #08 (TEMPERATURE SWING): A thermostat works by turning your heating or cooling system on  

and off whenever the room temperature varies from the desired set-point temperature. The amount of  

this variation is called the swing.  

INSTALLATION OF NEW THERMOSTAT:  

Use the wiring diagrams shown on the back of this installation sheet to find the closest match to your  

particular heating and/or cooling system. Please read ALL of the Wiring Diagram Notes that are shown  

above the connection diagrams, to avoid causing damage to your system or the new thermostat.  

Use the UP/DOWN buttons to change the number value between 1 and 9. Generally your system should  

cycle on about 3 to 6 times per hour. A smaller swing number makes the system cycle more frequently,  

so the room temperature is more precise and constant. A larger swing number will make the system  

remain on for a longer duration each time and decreases the number of cycles per hour.  

1. Strip wire insulation leaving only 3/8 in. (9.5mm) bare wire ends, and clean off any corrosion  

present.  

2. Fill the wall opening with non-combustible insulation to prevent drafts from affecting the  

thermostat’s normal operation.  

3. Route the wires through the opening in the new thermostat base plate, and install the mounting  

screws.  

4. If the previous holes cannot be used, hold the thermostat base against the wall so that it appears  

straight and level (position the base for best appearance) and mark for the new screw holes. Attach  

the base to the wall using the screws provided (use the supplied plastic anchors if needed when  

mounting to a soft material such as drywall).  

5. When attaching the wires to the thermostat, please ensure that the bare wire ends are held ALL the  

way into the terminal block while the screw is being tightened, and be careful not to over tighten  

them, as they only need to be snug.  

ITEM #09 (STAGE-2 OFFSET): [2, default] This setting is adjusted as a number from 0 to 9. When set  

to 0 (ZERO), the second heating stage is completely disabled while in regular Heat mode (however  

Emergency Heat mode will still function for heat pump configurations). An Offset value from 1 to 9  

degrees will determine the number of degrees from the set point that will be required for the second  

heating stage to turn on. This setting can be used to conserve energy in situations where the second  

heating stage is more costly to operate when compared to the first stage.  

SET DAY AND TIME:  

Place the Set Slide Switch into the DAY/TIME position. With the day flashing, press UP or DOWN to set  

the day of the week. Press NEXT and the clock time will start flashing. Use UP or DOWN to set the  

time, making sure the AM/PM indication is correct. Holding the UP or DOWN buttons will make the  

clock digits scroll rapidly. Return the Set Slide switch to the RUN position when finished.  

COMPLETE THE INSTALL:  

GAS / ELEC CIRCUIT BOARD OPTION (“G” TERMINAL FAN OPERATION): This setting is a plastic  

shorting cap called a jumper. This jumper must remain installed, and set to either GAS or ELECTRIC for  

your system to work properly. This setting changes how your system’s blower fan (if applicable) is  

controlled while the thermostat is in HEAT or EMERG HEAT mode, when the Fan switch in the AUTO  

position. This setting does not affect the fan operation while in COOL mode.  

BASIC HEATING AND COOLING OPERATION:  

Basic operation of your heating or cooling system can be obtained with the Set Slide Switch in the RUN  

position and choosing either HEAT or COOL on the System Mode switch. The temperature can be  

adjusted using the UP and DOWN buttons. When the thermostat is first powered up, it will follow a  

default temperature routine that is preset from the factory. Alternatively, you can use the HOLD button  

to maintain a fixed Set Temperature.  

When set to “GAS”, the blower fan is controlled solely by the  

heating system itself. Systems that would typically use the “GAS”  

setting would be: natural gas, propane, or oil furnaces, and boilers.  

NOTE: If your blower fan does not operate properly after  

installation, move the Gas / Electric option to the “Electric” setting.  

BATTERY  

DOWNLOAD FULL INSTRUCTION MANUAL FROM OUR WEBSITE:  

This sheet contains basic installation steps and setup instructions. There are additional topics covered  

in greater detail, such as adjustable set temperature limits, keypad lockout, and the air filter monitor, in  

the full version of the instruction manual for this thermostat product. The full PDF version of this  

manual can be downloaded at http://www.luxproducts.com. Click on SUPPORT, then INSTRUCTION  

MANUALS.  

When set to “ELEC”, the blower fan is controlled directly by the  

thermostat. This setting is required for heating systems that do not  

control their own fan, such as HEAT PUMPS, and units that only  

have an electric-resistive heating element as the heat source.  

ELEC  

GAS  

©

2 0 1 5 L U X P R O D U C T S C O R P O R A T I O N . A L L R I G H T S R E S E R V E D  

https://manual-hub.com/  

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General	Details
Name	LUX TX700U Universal Thermostat Instruction Manual
Make	LUX
Language	English
Filetype	PDF (Download)
File size	0.84 MB

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LUX TX700U Universal Thermostat Instruction Manual Overview

Summary of Contents

• Page 1: FRONT PANEL CONTROLS HEAT / OFF / COOL, SYSTEM MODE SWITCH: Set this switch to HEAT to control your heating system, and COOL to control your cooling system. AUTO / ON, FAN MODE SWITCH: When in AUTO, the blower fan will cycle on and off only while heating or cooling. MULTI-FUNCTION, SET SLIDE SWITCH: This provides easy access to common settings, and should always remain in RUN unless a specific item is being adjusted. UP / DOWN BUTTONS: The UP and DOWN buttons are used to control the set temperature, or adjust any other on-screen items. HOLD BUTTON: This button activates and deactivates the manual Temperature Hold feature, which maintains a fixed set temperature indefinitely. EMER BUTTON: This button activates Emergency Heat mode and prevents the outdoor unit from running. SYSTEM COMPATIBILITY: This thermostat can be used with most 24 volt heating and cooling systems, including heat pumps with an aux/emerg heat element. INSTALL BATTERIES INTO THERMOSTAT: Install two brand new alkaline batteries into the thermostat’s battery compartment. CAUTIONS AND WARNINGS: The thermostat requires batteries to operate and failure or sub-standard performance of the batteries may impair or prevent correct operation. SETUP MENU: Move the System Mode switch into the OFF position, and then hold down the EMER button for approximately 5 seconds until the screen changes.
• Page 2: TEMPERATURE PROGRAMMING By default, this thermostat has 4 separate program periods for both Heat and Cool modes: MORN, DAY, EVE, and NITE. The Heat temperature programs are set while the mode switch is in the HEAT position, and the Cool temperature programs are set while the mode switch is in the COOL. If the thermostat is configured to use only 2 periods per day, it will only use the DAY and NITE period designations. To set a temperature program, choose either HEAT or COOL mode and move the Set Slide switch to the TEMP PROG position. Emergency Heat mode is only present if the thermostat is setup for a Heat Pump configuration. A single press of the EMER button will activate Emergency Heat mode. If a mains power loss occurs while in Emergency Heat mode, the thermostat will continue to remain in Emergency Heat mode after power is restored. Emergency Heat mode will prevent the first stage of your heat pump system from turning on. If you have any problems installing or using this thermostat, please carefully review the instruction manual.