1. Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of your LUX LTX500U Programmable Thermostat. The LTX500U is designed to offer precise temperature control and energy savings through its 5-2 day programming capabilities and selectable Smart Recovery feature. It is compatible with most 24V heating and cooling systems, excluding electric baseboard heat.

Imatge 1.1: Davant view of the LUX LTX500U Thermostat. The digital display shows the current room temperature (72°F), set temperature (74°F), time (5:36 PM), day (Tuesday), and system status (HEAT, FAN).
2. Informació de seguretat
- Desconnecteu sempre l'alimentació del sistema de calefacció/refrigeració al fusible principal o al quadre elèctric abans d'instal·lar o fer el manteniment del termòstat.
- This thermostat operates on 24 Volts AC. Do not use it with line voltage systems (120V or 240V).
- Assegureu-vos que totes les connexions de cablejat siguin segures i que compleixin els codis elèctrics locals.
- Si teniu dubtes sobre alguna part del procés d'instal·lació, consulteu un tècnic qualificat de climatització.
- Mantingueu les piles fora de l'abast dels nens. Desfeu-vos de les piles usades de manera responsable.
3. Contingut del paquet
Verifiqueu que tots els elements que s'enumeren a continuació siguin presents al paquet del producte:
- LUX TX500U Thermostat
- Instruction Manual (English, Spanish)
- Etiqueta de cablejat
- 2 cargols
- 2 ancoratges de paret
- Filferro de pont

Imatge 3.1: Illustration of the items included in the LUX TX500U product package, ensuring all components are present for installation.
4. Instal·lació
4.1 Treure el termòstat antic
- Apagueu l'alimentació: Locate the main power switch for your heating and cooling system (usually at the furnace or circuit breaker panel) and turn it off.
- Traieu la coberta: Carefully remove the cover of your old thermostat. Some covers snap on, while others may have screws.
- Cablejat de fotografia: Before disconnecting any wires, take a clear photograph of the current wiring connections. This will serve as a reference.
- Etiqueta els cables: Use the provided wiring labels to mark each wire with the corresponding terminal letter from your old thermostat. If your old thermostat has a jumper wire between terminals (e.g., R and Rc), note this.
- Desconnectar els cables: Desconnecteu els cables dels terminals del termòstat antic.
- Eliminar la base antiga: Unscrew and remove the old thermostat base from the wall.
4.2 Muntatge del nou termòstat
- Position New Base: Hold the new LUX LTX500U thermostat base against the wall where you want to mount it. Ensure the wires can pass through the opening.
- Marqueu els forats de perforació: Use a pencil to mark the locations for the mounting screws.
- Forats: Drill pilot holes at the marked locations (if necessary) and insert the wall anchors.
- Base segura: Feed the wires through the opening in the new thermostat base and secure the base to the wall using the provided screws.
4.3 Wiring the Thermostat
Refer to your photograph and the wiring label from your old thermostat. Connect the wires to the corresponding terminals on the LUX LTX500U. The LTX500U is compatible with a wide range of systems. Consult the "System Compatibility" image below for detailed information.

Imatge 4.1: This chart outlines the system compatibility for the LUX LTX500U thermostat. It lists various 24V heating systems (Gas/Oil/Electric Furnace, Heat Pump with/without Auxiliary Heat, Hydronic, Millivolt, Gas Fireplaces) and cooling systems (Cooling only, Single stage cooling) as compatible. It explicitly states non-compatibility with Heat Pump Multistage, Radiant Ceiling Heat, Electric Baseboards, Portable space heaters, Plug-in air conditioners, and Cool Multistagsistemes electrònics.
Notes importants sobre el cablejat:
- If your old thermostat had separate R and Rc terminals with a jumper, remove the jumper and connect the R wire to the R terminal and the Rc wire to the Rc terminal on the LTX500U. If you only have one R wire, connect it to the R terminal and place the provided jumper wire between R and Rc.
- Ensure wires are stripped to the correct length and securely inserted into the terminals.
- After wiring, gently push any excess wire back into the wall opening.
4.4 Installing Batteries and Attaching Thermostat
- Insereix les piles: Open the battery compartment on the back of the thermostat faceplate. Insert two (2) fresh AA alkaline batteries, observing the correct polarity (+/-).
- Fixeu la placa frontal: Carefully align the thermostat faceplate with the mounted base and gently push until it snaps securely into place.
- Restaura l'alimentació: Return to your main fuse or circuit breaker panel and turn the power back on to your heating and cooling system.
5. Instruccions de funcionament
The LUX LTX500U thermostat features an intuitive control panel for easy operation. Familiarize yourself with the controls shown below.

Imatge 5.1: Detailed diagram of the LUX TX500U control panel. Key components include the LCD Display Screen, Fan Mode Switch (FAN ON/AUTO), System Mode Switch (TEMPERATURE HEAT/OFF/COOL), Set Slide Switch (RUN/DAYTIME/TEMP PROG/AIR FILTER), and the UP, DOWN, and HOLD buttons located below the display.
5.1 Configuració de l'hora i el dia actuals
- Feu lliscar el Estableix l'interruptor lliscant to the "DAYTIME" position.
- Utilitza el UP or ABAIX botons per ajustar l'hora actual.
- Premeu el botó SEGÜENT button to advance to setting the day of the week.
- Utilitza el UP or ABAIX buttons to select the correct day.
- Feu lliscar el Estableix l'interruptor lliscant back to "RUN" when finished.
5.2 Selecció del mode del sistema
Utilitza el Interruptor de mode del sistema (located on the left side of the thermostat) to select your desired operating mode:
- CALOR: The thermostat will control your heating system.
- DESACTIVAT: Els sistemes de calefacció i refrigeració estan apagats.
- GUAI: The thermostat will control your cooling system.
5.3 Selecció del mode de ventilador
Utilitza el Fan Mode Switch (located on the left side, above the System Mode Switch) to select your desired fan operation:
- AUTOMÀTIC: El ventilador només funciona quan el sistema de calefacció o refrigeració està en funcionament. Aquesta és la configuració més comuna i eficient energèticament.
- ACTIVITAT: El ventilador funciona contínuament, independentment de si el sistema de calefacció o de refrigeració està actiu.
5.4 Programming the Schedule (5-2 Day)
The LTX500U allows for 5-2 day programming, meaning you can set one schedule for weekdays (Monday-Friday) and a separate schedule for weekends (Saturday-Sunday). You can choose between 2 or 4 periods per day.
- Feu lliscar el Estableix l'interruptor lliscant to the "TEMP PROG" position.
- The display will show the first programming period (e.g., "M-F WAKE").
- Utilitza el UP or ABAIX botons per ajustar la temperatura desitjada per a aquest període.
- Premeu el botó SEGÜENT button to set the start time for this period. Use UP or ABAIX per ajustar-se.
- Continueu prement SEGÜENT and adjusting temperature/time for all desired periods (WAKE, LEAVE, RETURN, SLEEP) for weekdays.
- After programming weekdays, the thermostat will automatically advance to weekend programming (e.g., "S-S WAKE"). Repeat steps 3-5 for Saturday and Sunday.
- To copy a day's program to another day, use the CÒPIA function (refer to the full manual for specific steps).
- Feu lliscar el Estableix l'interruptor lliscant back to "RUN" when programming is complete.
5.5 Smart Recovery Feature
The selectable Smart Recovery feature allows the thermostat to learn how long it takes your HVAC system to reach the programmed temperature. It will then activate the system ahead of schedule to ensure the desired temperature is met precisely at the start of your programmed period. This feature can be enabled or disabled in the advanced settings (refer to the full manual for details).
5.6 Temporary Override and Manual Hold
- Anul·lació temporal: While in "RUN" mode, pressing the UP or ABAIX buttons will temporarily adjust the temperature. The thermostat will maintain this new temperature until the next programmed period begins.
- Retenció manual: Premeu el botó MANTENIM button to maintain the current temperature indefinitely. The "HOLD" indicator will appear on the display. To cancel the hold and resume the program, press the MANTENIM botó de nou.
5.7 Air Filter Monitor
The LTX500U includes a graphical air filter monitor. When it's time to change your air filter, an indicator will appear on the display. To reset the monitor after changing the filter, slide the Estableix l'interruptor lliscant to "AIR FILTER" and follow the on-screen instructions.
6. Manteniment
6.1 Substitució de la bateria
The thermostat requires two (2) AA alkaline batteries for operation. When the battery indicator appears on the display, replace the batteries promptly to ensure continuous operation. Low batteries can affect thermostat performance.
- Gently pull the thermostat faceplate away from the wall base.
- Remove the old AA batteries from the compartment.
- Introduïu dues piles alcalines AA noves, assegurant-vos de la polaritat correcta.
- Snap the faceplate back onto the wall base.
Nota: Rechargeable batteries are not recommended as they may not provide consistent voltage, leading to premature low battery warnings.
6.2 Neteja del termòstat
Per netejar el termòstat, netegeu suaument l'exterior amb un drap suau i sec.amp cloth. Do not use abrasive cleaners, solvents, or spray cleaners directly onto the thermostat. Avoid getting moisture inside the unit.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| La pantalla està en blanc o tènue. | Piles gastades o baixes. | Substituïu-les per piles alcalines AA noves. |
| Heating/Cooling system does not turn on. | Power to HVAC system is off. Incorrect wiring. System mode switch is OFF. | Check circuit breaker. Verify wiring connections. Set System Mode Switch to HEAT or COOL. |
| La lectura de temperatura sembla inexacta. | Thermostat location near heat source/draft. Calibration needed. | Ensure thermostat is not exposed to direct sunlight, drafts, or heat sources. Refer to the full manual for temperature calibration instructions. |
| Programmed schedule is not running. | Thermostat is in HOLD mode. Set Slide Switch is not in RUN. | Press the HOLD button to cancel hold. Slide the Set Slide Switch to RUN. |
For more detailed troubleshooting, please refer to the complete instruction manual available online or contact customer support.
8. Especificacions
- Nom del model: LTX500U-A04
- Dimensions del producte: 1.38 "P x 1.38" W x 10.9" H
- Tipus de controlador: Toca
- Característica especial: Programmable (5-2 Day)
- Color: Blanc
- Usos específics: Air Conditioner, Boiler, Furnace
- Tipus de control de temperatura: Digital
- Tecnologia de connectivitat: Wi-Fi (Note: Product description mentions Wi-Fi, but feature bullets and reviews suggest it might be a basic programmable thermostat. User should verify Wi-Fi functionality if desired.)
- Components inclosos: Termòstat
- Font d'alimentació: Funciona amb piles (necessiten 2 piles AA)
- Voltage: 24 volts (CA)
- Tipus de visualització: Digital
- Tipus de muntatge: Muntatge de paret
- Il·luminació de fons: Sí
- Pes de l'article: 8.1 unces
- UPC: 021079115006
9. Garantia i Suport
9.1 Garantia limitada
The LUX LTX500U Thermostat typically comes with a Garantia limitada de 3 anys from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. Specific terms and conditions may apply; refer to the warranty card included with your product or the manufacturer's weblloc per obtenir més informació.

Imatge 9.1: This image illustrates the "Easy to Operate and Program" aspects of the LUX TX500U, featuring icons for speed-slide programming, battery or system power, and compatibility with up to 2 heat/1 cool systems. A prominent "LIMITED 3 YEAR WARRANTY" badge is visible in the bottom right corner.
9.2 Atenció al client
For technical assistance, troubleshooting, or warranty inquiries, please contact LUX customer support. Contact information can typically be found on the manufacturer's weblloc web o a l'embalatge del producte.
Recursos en línia: Visit the official LUX weblloc web per a preguntes freqüents, manuals addicionals i recursos de suport.





