1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your LuxPRO PSP511LC Programmable Thermostat. Designed for ease of use and energy efficiency, this thermostat allows you to precisely control your home's heating and cooling for optimal comfort.

The LuxPRO PSP511LC thermostat seamlessly integrates into various home environments.
2. Key Features
- Program your weekdays and weekends separately for tailored comfort and energy savings.
- Enjoy the exclusive Lux Speed Dial for quick and easy programming.
- Program up to 4 periods per day with separate programs for heating and cooling, maximizing comfort and efficiency.
- Features keyboard lockout and temperature control from 45°F to 90°F (7°C to 32°C) for precise comfort management.
- Small, elegant design with a large, back-lit digital display.
- Includes an Air Filter Monitor to remind you when to change your filter.
- Battery-free memory storage ensures your settings are retained during power outages.
- Offers Temporary Temperature Override and Temperature Hold functions.
- Adjustable Temperature Differential / Cycle Rate for fine-tuning system performance.
- Can be powered by system or batteries.
- 5-minute minimum run/off time for short cycle and compressor protection.

The thermostat features a back-lit display and can be powered by either batteries or the HVAC system.
3. What's in the Box
Upon opening your LuxPRO PSP511LC thermostat package, you should find the following items:
- PSP511LC Programmable 5-2 Day Thermostat Unit
- 2 AA LR6 Batteries (included)
- 2 ST Screws
- 2 Wall Anchors
- Wire Label Sheet
- Instruction Manual (this document)
4. Installation & Setup
For detailed installation instructions, including wiring diagrams and mounting procedures, please refer to the official Installation Manual (PDF). It is highly recommended to consult a qualified HVAC technician for installation if you are unsure about any steps.
System Compatibility
The PSP511LC thermostat is designed for specific HVAC systems. Please review the compatibility information below before installation:
| Compatible With (24V) | NOT Compatible With |
|---|---|
| Gas/Oil/Electric Furnace - Heating only | Multi-stage heat pumps |
| Gas/Oil/Electric Furnace - Single Stage | Multi-stage cool systems |
| Heat Pump w/o Auxiliary Heat | Radiant Ceiling Heat |
| 2-wire Hydronic (Hot Water) | Electric Baseboards |
| 750 Millivolt systems | Portable space heaters |
| Gas Fireplaces (24V) | Plug-in air conditioners |
| Cooling only systems | Gas/Oil/Electric Furnace - Multi-stage |
| Single stage cooling systems | Heat Pump w/ Auxiliary Heat |
| 3-wire Hydronic (Hot Water) |

Ensure your HVAC system is compatible with the PSP511LC thermostat before installation.
5. Operating Instructions
The LuxPRO PSP511LC thermostat features a user-friendly interface with a clear LCD and dedicated buttons for easy control.

Detailed view of the thermostat's simple and intuitive control panel.
5.1. Setting Time & Day
- Rotate the SET DAY/TIME dial to the 'SET DAY/TIME' position.
- Use the ∧ (Up) or ∨ (Down) buttons to adjust the time.
- Press the NEXT button to advance to setting the day of the week.
- Use the ∧ (Up) or ∨ (Down) buttons to select the current day.
- Rotate the dial back to 'RUN' to save settings.
5.2. Adjusting Temperature
In 'RUN' mode, simply use the ∧ (Up) or ∨ (Down) buttons to set your desired temperature. The new set point will remain until the next programmed period begins or until manually changed.
5.3. Programming Schedules (5-2 Day)
The thermostat allows for separate programming for weekdays (Monday-Friday) and weekends (Saturday-Sunday), with up to 4 periods per day.
- Rotate the dial to WEEKDAY PROGRAM or WEEKEND PROGRAM.
- Use the NEXT button to cycle through the 4 programming periods (e.g., Wake, Day, Evening, Sleep).
- For each period, use the ∧ (Up) or ∨ (Down) buttons to set the desired time and temperature for both heating and cooling.
- Rotate the dial back to 'RUN' to activate the program.
5.4. Fan Operation
Use the FAN switch to select the desired fan mode:
- AUTO: The fan runs only when the heating or cooling system is actively operating. This is the most energy-efficient setting.
- ON: The fan runs continuously, regardless of whether the heating or cooling system is active.
5.5. Temperature Mode
Use the TEMPERATURE switch to select the desired system mode:
- HEAT: The thermostat will control your heating system.
- OFF: Both heating and cooling systems are turned off.
- COOL: The thermostat will control your cooling system.
5.6. Temporary Temperature Override & Hold
- Temporary Override: While in 'RUN' mode, pressing the ∧ (Up) or ∨ (Down) buttons will temporarily override the current program setting. The new set point will remain until the next programmed period.
- HOLD: Press the HOLD button to maintain the current temperature indefinitely, overriding all programmed settings. Press HOLD again to cancel and resume the program.
6. Maintenance
6.1. Air Filter Monitor
The PSP511LC thermostat includes an Air Filter Monitor feature. This feature tracks the operational time of your HVAC system and will display a reminder when it's time to check or replace your air filter. Regularly changing your air filter is crucial for maintaining system efficiency and indoor air quality.
- When the 'AIR FILTER' indicator appears on the display, it's time to inspect your filter.
- After replacing or cleaning your filter, rotate the dial to 'AIR FILTER' and press the RESET button to clear the indicator and restart the timer.
6.2. Battery Replacement
The thermostat uses 2 AA batteries. When the battery indicator appears on the display, replace the batteries promptly to ensure continuous operation and prevent loss of settings. The thermostat has battery-free memory storage, so your programmed settings will be retained during battery replacement.
7. Troubleshooting
If you encounter issues with your LuxPRO PSP511LC thermostat, please review the following common troubleshooting tips. For more complex problems, consult the full installation manual or contact customer support.
- No Display / Blank Screen: Check battery installation and ensure they are fresh. If wired, verify power supply to the thermostat.
- System Not Responding (Heating/Cooling): Ensure the system switch is set to HEAT or COOL, not OFF. Check that the fan switch is set to AUTO or ON. Verify wiring connections are secure.
- Incorrect Temperature Readings: Ensure the thermostat is not exposed to direct sunlight, drafts, or heat sources that could affect its sensor.
- Programming Issues: Double-check your programmed times and temperatures. Ensure the dial is set to 'RUN' for the program to execute.
- Thermostat Reset: If the thermostat is behaving erratically, a soft reset can sometimes resolve the issue. Locate the small reset button (often recessed) and press it gently with a paperclip.
8. Product Specifications
| Specification | Detail |
|---|---|
| Brand | LUX |
| Model Name | PSP511LC-010 |
| Product Dimensions | 5"D x 3.25"W x 1.5"H |
| Controller Type | Mechanical knob, Button Control |
| Special Feature | Low Voltage |
| Color | White |
| Specific Uses For Product | Air Conditioner, Heating Systems |
| Temperature Control Type | Heating and Cooling |
| Power Source | Battery Powered (2 AA batteries included) |
| Voltage | 24 Volts |
| Material | Plastic |
| Display Type | Digital with Backlight |
| Mounting Type | Wall Mount |
| Item Weight | 9.1 ounces |
9. Warranty & Support
The LuxPRO PSP511LC thermostat comes with a 5-Year Limited Warranty, ensuring reliability and peace of mind. For warranty claims, technical support, or additional product information, please visit the official LUX website or contact their customer service department.
For further assistance, you may also refer to the LUX Store on Amazon.








