Welcome to the Honeywell TH5110D1022 manual, a comprehensive guide for installing, operating, and troubleshooting this non-programmable digital thermostat. Designed for 24 Vac systems or 750 mV heating systems, it offers user-friendly control for heating and cooling. This manual provides detailed instructions for mastering the thermostat’s features and ensuring optimal performance. Perfect for both new users and experienced technicians, it covers everything from basic setup to advanced configurations. Get ready to unlock the full potential of your Honeywell TH5110D1022 thermostat with this essential resource.
Overview of the Honeywell TH5110D1022 Thermostat
The Honeywell TH5110D1022 is a non-programmable digital thermostat from the FocusPRO TH5000 series, designed for straightforward control of heating and cooling systems. It supports up to 3 heat stages and 2 cool stages, making it versatile for various HVAC configurations. With a large, easy-to-read display, this thermostat offers precise temperature control and intuitive navigation. Its compatibility with 24 Vac conventional and heat pump systems, as well as 750 mV heating systems, ensures wide-ranging applicability. The thermostat features a sleek, premier white design and includes terminals for R, Rc, C, W (O/B), Y, and G connections. Designed for simplicity and efficiency, the Honeywell TH5110D1022 is an ideal choice for users seeking reliable climate control without advanced programming features.
Purpose and Scope of the Manual

This manual serves as a detailed guide for the Honeywell TH5110D1022, a non-programmable digital thermostat designed for 24 Vac systems or 750 mV heating systems. Its purpose is to provide clear instructions for installation, operation, and troubleshooting, ensuring users can maximize the thermostat’s functionality. The manual covers essential topics such as system settings, temperature adjustment, and error codes, while avoiding advanced configurations beyond its non-programmable design. Intended for both homeowners and technicians, it offers step-by-step guidance to simplify setup and maintenance. By following this manual, users can efficiently manage their heating and cooling systems, ensuring optimal performance and energy efficiency. This comprehensive resource is tailored to meet the needs of anyone working with the Honeywell TH5110D1022 thermostat.

Key Features of the Honeywell TH5110D1022
The Honeywell TH5110D1022 features a large, easy-to-read display, compatibility with 24 Vac systems, and non-programmable functionality for straightforward heating and cooling control. It supports up to 3 Heat/2 Cool systems, offering flexible operation for various HVAC setups. Designed with user-friendly navigation, this thermostat provides precise temperature control and fan settings, ensuring comfort and energy efficiency. Its compact design and Premier White finish blend seamlessly into any home decor. With terminals for R, Rc, C, W (O/B), Y, and G, it offers reliable connections for optimal performance. This thermostat is ideal for homeowners seeking a simple yet effective temperature management solution.
Large Screen Display
The Honeywell TH5110D1022 boasts a large, high-contrast display that ensures easy readability from across the room. This feature is particularly beneficial for users who may have difficulty with smaller screens or those who want quick, at-a-glance temperature monitoring. The display is backlit, providing clear visibility even in low-light conditions, and it presents all essential information, such as current temperature, setpoint, and system mode, in an organized layout. The large screen display is one of the standout features of this thermostat, making it user-friendly and accessible for everyone. Its intuitive design allows for seamless navigation and control, enhancing the overall user experience. This display is a testament to Honeywell’s commitment to creating products that are both functional and visually appealing.
Compatibility with Heating and Cooling Systems
The Honeywell TH5110D1022 is designed to be compatible with a wide range of heating and cooling systems, ensuring versatility for various home setups. It supports 24 Vac conventional and heat pump systems, as well as 750 mV heating systems, making it adaptable to different configurations. The thermostat is equipped with standard terminals, including R, Rc, C, W (O/B), Y, and G, which simplify installation and wiring. This broad compatibility ensures that the Honeywell TH5110D1022 can be integrated seamlessly with most HVAC systems, providing reliable performance and precise temperature control. Whether you have a single-stage heating and cooling system or a heat pump setup, this thermostat is designed to meet your needs effectively. Its flexibility and compatibility make it a practical choice for homeowners seeking efficient climate control.
Non-Programmable Digital Thermostat Functionality
The Honeywell TH5110D1022 operates as a non-programmable digital thermostat, offering straightforward temperature control without scheduling capabilities. This design simplifies operation for users who prefer manual adjustments. The thermostat provides precise digital temperature control, allowing for easy adjustments using the keypad. It does not require complex programming, making it ideal for those who want a hassle-free experience. The digital display ensures clear visibility of the current temperature and system status. While it lacks programmable features, it excels in reliability and ease of use, making it a great option for basic heating and cooling needs. Its functionality focuses on immediate temperature adjustments, ensuring consistent comfort without the need for advanced scheduling.

Installation Process
Install the Honeywell TH5110D1022 by turning off power, removing the old thermostat, and mounting the new device. Follow wiring connections carefully and restore power to test functionality.
Pre-Installation Requirements
Before installing the Honeywell TH5110D1022, ensure the power to your HVAC system is turned off at the circuit breaker. Verify compatibility with your heating and cooling systems, including gas, electric, or heat pump configurations. Gather necessary tools like a screwdriver, voltage tester, and wired connectors. Review the wiring diagram in this manual to match your system’s setup. Ensure the thermostat’s mounting location is accessible and free from obstructions. If upgrading, remove the old thermostat and label the wires for reference. Double-check the voltage requirements (24V AC) to avoid damage. Read the manual thoroughly to understand the installation steps and safety precautions. Proper preparation ensures a smooth and safe installation process.
Step-by-Step Installation Guide
Turn off power to your HVAC system at the circuit breaker.
Remove the old thermostat and label the wires for identification.
Mount the new thermostat base to the wall using screws and anchors.
Connect the wires to the appropriate terminals, referencing the wiring diagram.
Secure the thermostat faceplate to the base.
Restore power and test the system to ensure proper operation.
Program settings as desired, following the manual’s instructions.
Ensure all connections are secure to prevent malfunctions. Always refer to the wiring diagram for specific configurations. If unsure, consult a licensed electrician. Proper installation ensures optimal performance and safety.
Wiring Diagrams and Connections
The Honeywell TH5110D1022 thermostat requires precise wiring connections to function properly; Refer to the wiring diagram provided in the manual to identify the correct terminals for your system. Common wire labels include R (24V power), W (heating), Y (cooling), G (fan), C (common), and O/B (heat pump). Ensure the wires are securely connected to the corresponding terminals on the thermostat. If your system uses a different wiring configuration, consult the diagram to match the wires correctly. Properly connecting the wires prevents malfunctions and ensures safe operation. If unsure, consult a licensed electrician to avoid electrical hazards. Always turn off power to the HVAC system before handling wires. Correct wiring ensures optimal thermostat performance and compatibility with your heating and cooling system.

Mounting the Thermostat
Mounting the Honeywell TH5110D1022 thermostat requires careful attention to ensure proper installation and functionality. Begin by selecting a location on an interior wall, approximately 52 inches from the floor, away from direct sunlight, drafts, and heat sources. Remove the old thermostat and take note of the wiring configuration. Use the provided wall anchors to secure the mounting screws to the wall, ensuring they are level. Gently attach the thermostat base to the wall using the screws, making sure it is firmly secured. If necessary, use the optional wall plate to cover any large holes from the previous installation. Once mounted, align the thermostat with the base and snap it into place. Ensure the device is level and securely fastened to the wall for accurate temperature sensing and reliable operation.

Operating Instructions
Operating the Honeywell TH5110D1022 involves navigating the interface, setting temperatures, and understanding display indicators. Use the buttons to adjust settings and ensure proper system operation.
Basic Operations and Navigation

The Honeywell TH5110D1022 operates intuitively, with a user-friendly interface. To begin, ensure the thermostat is properly powered. Use the up and down arrows to adjust the desired temperature. The display screen shows the current temperature and setpoint. Navigate through settings using the “Menu” button, which accesses options like system mode and fan settings. The “Hold” button allows temporary overrides, while the “Run” button returns to the programmed schedule. The backlit display ensures visibility in low-light conditions. Familiarize yourself with the buttons and their functions to optimize control over your heating and cooling system. Regularly check the battery level indicator to avoid interruptions in operation. This thermostat is designed for simplicity, making it easy to manage your home’s climate effectively. Always refer to the manual for detailed guidance on specific functions and features.
System Settings and Mode Selection
The Honeywell TH5110D1022 allows users to customize system settings and select operating modes to suit their preferences. The thermostat supports modes such as Heat, Cool, and Off, which can be selected using the menu navigation. System settings include options like temperature range limits, ensuring the thermostat operates within a desired range. Additionally, users can configure the fan operation to run continuously or only during heating/cooling cycles. The mode selection is straightforward, with clear indicators on the display. Access these settings through the “Menu” button and navigate using the arrows. Properly configuring system settings ensures optimal performance and energy efficiency. Always refer to the manual for detailed instructions on adjusting these parameters to meet your specific needs. This feature-rich interface makes it easy to tailor the thermostat’s behavior to your lifestyle.
Temperature Adjustment and Fan Control
The Honeywell TH5110D1022 allows precise temperature adjustment using the up and down arrows. Users can set their desired temperature, and the display will show both the setpoint and the current room temperature. The thermostat also features fan control, enabling users to choose between Auto and On modes. In Auto mode, the fan operates only during heating or cooling cycles, while On mode runs the fan continuously for improved air circulation. Adjusting these settings is straightforward via the menu navigation. The thermostat ensures accurate temperature maintenance and energy efficiency. Proper use of temperature and fan settings can enhance comfort and reduce energy consumption. Always refer to the manual for detailed guidance on optimizing these features for your specific HVAC system; This thermostat’s intuitive design makes it easy to manage your indoor climate effectively.
Understanding the Display and LEDs
The Honeywell TH5110D1022 features a large, backlit display that provides clear visibility of temperature settings, current room temperature, and system status. The display is easy to read in both bright and low-light conditions. LEDs on the thermostat indicate the active mode, such as heating (HE) or cooling (COOL), and alert users to system issues. The display also shows icons for fan operation and swing mode. Users can adjust the brightness of the display to suit their preferences. Understanding the display and LEDs helps in monitoring the thermostat’s operation and ensures proper functionality. Refer to the manual for a detailed explanation of all symbols and LED behaviors. This section focuses solely on interpreting the display and LEDs, providing essential insights for effective thermostat management. Proper interpretation enhances user experience and troubleshooting efficiency.

Advanced Configuration Options
The Honeywell TH5110D1022 offers advanced settings for optimizing system performance, including easily configurable fan operation and swing mode adjustments to customize airflow and temperature distribution.
Configuring the Fan Settings
Configuring the fan settings on the Honeywell TH5110D1022 allows for precise control over airflow in your home. The thermostat offers multiple fan modes, including Auto and On, which can be selected based on your comfort needs. In Auto mode, the fan operates only when the heating or cooling system is active, while On mode keeps the fan running continuously for improved air circulation. To adjust these settings, navigate to the fan menu using the touchscreen interface, select your preferred mode, and confirm your choice. You can also adjust the fan speed in some configurations for optimal performance. Proper fan configuration ensures efficient energy use and maintains consistent temperatures throughout your space. This feature is particularly useful for balancing airflow in larger homes or for maintaining air quality year-round. Regularly reviewing and updating fan settings can enhance overall system efficiency and comfort.
Adjusting the Swing Mode
The Honeywell TH5110D1022 thermostat allows you to adjust the swing mode, which determines the temperature range within which the system cycles on and off. The swing mode setting specifies how much the temperature can deviate from the setpoint before the heating or cooling system activates. A smaller swing setting provides tighter temperature control but may increase system runtime, while a larger swing setting can reduce runtime but may result in slightly less consistent temperatures. To adjust the swing mode, navigate to the advanced settings menu on the thermostat’s touchscreen interface, select the desired swing value, and save your changes. This feature is useful for balancing comfort and energy efficiency based on your preferences. Proper adjustment ensures optimal system performance and comfort levels in your home. Regularly reviewing this setting can help maintain energy savings and consistent indoor conditions. Always refer to the manual for specific adjustment instructions.

Troubleshooting Common Issues
The Honeywell TH5110D1022 thermostat may encounter issues like blank displays, incorrect temperatures, or unresponsive controls. Check power sources, wiring connections, and system compatibility. Restarting the device often resolves these problems. Ensure proper installation and settings configuration. Refer to the manual for detailed diagnostic steps and solutions. Addressing issues promptly ensures optimal performance. Regular maintenance helps prevent malfunctions. Always verify electrical connections and battery levels if applicable. Consulting the troubleshooting guide in the manual provides targeted fixes for specific errors. This ensures efficient resolution and minimizes downtime. Proper care extends the thermostat’s lifespan;
Identifying and Resolving Common Problems
Common issues with the Honeywell TH5110D1022 include a blank or unresponsive display, incorrect temperature readings, or the system not turning on. Start by verifying power sources and ensuring batteries are installed correctly if applicable. Check wiring connections for looseness or damage. If the display is blank, try resetting the thermostat by turning it off and on. For temperature inaccuracies, ensure the sensor is clean and properly calibrated. Use the manual’s troubleshooting guide to identify specific error symptoms. Adjust system settings or restore factory defaults if necessary. Regularly cleaning the thermostat and checking for software updates can prevent recurring issues. Always refer to the manual for step-by-step solutions tailored to your problem.
Understanding Error Codes and Alarms
The Honeywell TH5110D1022 displays error codes to indicate specific issues, such as sensor malfunctions or system errors. Codes like “E1” or “E2” typically relate to temperature sensing or communication problems. Refer to the manual for a full list of codes and their meanings. Alarms may sound if the system detects abnormal operating conditions, such as extreme temperature deviations. To address these, check wiring connections, ensure proper sensor installation, and verify system settings. Resetting the thermostat or replacing faulty components may resolve the issue; Regular maintenance, like cleaning sensors and updating software, can help prevent errors. Always consult the manual for code-specific solutions to ensure proper system functionality and safety.
Resetting the Thermostat to Factory Settings
To reset the Honeywell TH5110D1022 to factory settings, first access the menu by pressing and holding the “Menu” button. Navigate to the “Factory Reset” option using the up or down arrows and select it with the “OK” or “Select” button. Confirm the action when prompted to erase all custom settings. After confirmation, the thermostat will revert to default settings, and you may need to power cycle it by turning it off and on again. This process is useful for resolving persistent issues or preparing the device for a new user. Always reconfigure settings afterward, as all custom configurations will be lost. Consult the manual or online resources for exact steps to ensure a successful reset without complications.
The Honeywell TH5110D1022 offers reliable performance and ease of use, ensuring efficient temperature control. By following this manual, users can optimize settings for enhanced comfort and energy savings.
Final Thoughts on Using the Honeywell TH5110D1022
The Honeywell TH5110D1022 is a user-friendly and efficient thermostat designed to enhance home comfort. Its straightforward interface and reliable performance make it a great choice for managing heating and cooling systems. By following the manual, users can easily navigate through settings, adjust temperatures, and optimize energy usage. The large display ensures clear visibility, while the non-programmable design simplifies daily operations. Whether adjusting modes or configuring fan settings, the thermostat delivers consistent results. For any issues, the troubleshooting guide and customer support options provide peace of mind. Overall, the Honeywell TH5110D1022 is a practical solution for achieving a comfortable living environment with minimal effort.

Additional Resources
For further assistance, visit the Honeywell website to access the full manual, additional guides, and support options. These resources ensure optimal use of your thermostat.
Accessing the Full Manual Online
To access the full Honeywell TH5110D1022 manual online, visit the official Honeywell website. Navigate to the “Support” or “Resources” section, where you can search for your thermostat model. Enter “TH5110D1022” in the search bar to find the downloadable PDF manual. This comprehensive guide includes detailed instructions, diagrams, and troubleshooting tips. Ensure your device has a PDF reader to view the manual. Additionally, Honeywell’s website offers FAQs, user guides, and videos to assist with installation, programming, and maintenance. For convenience, save the manual to your device for easy reference. This online resource is updated regularly, providing the most accurate and helpful information for optimal thermostat performance.
Customer Support and Assistance
Honeywell offers comprehensive customer support for the TH5110D1022 thermostat. Visit their official website to access the “Support” section, where you can find contact information, phone numbers, and email options for assistance. Live chat is also available for quick inquiries. For immediate help, call Honeywell’s customer service hotline, available during business hours. Additionally, Honeywell provides extended support hours for urgent issues. Their team is trained to address installation, programming, and operational questions. Online resources include troubleshooting guides, FAQs, and video tutorials. Community forums and Honeywell’s social media channels are also great places to connect with experts and other users. This extensive support network ensures you can resolve any issue efficiently, making your experience with the Honeywell TH5110D1022 hassle-free.