th6220u2000 installation manual
Th6220U2000 Installation Manual: A Comprehensive Guide
Welcome! This detailed manual provides essential guidance for a successful installation and optimal performance of your Honeywell Th6220U2000 thermostat‚ ensuring years of reliable comfort control.
It unlocks the full potential of your new device‚ detailing features‚ installation‚ operation‚ and maintenance for seamless integration into your home’s heating and cooling system.

The Honeywell Th6220U2000 is a sophisticated‚ programmable thermostat designed to provide precise temperature control and enhance energy efficiency within your home. This model offers a user-friendly interface combined with advanced features‚ allowing for customized comfort settings tailored to your lifestyle.
This thermostat isn’t just about setting temperatures; it’s about creating a comfortable and cost-effective living environment. It seamlessly integrates with various heating and cooling systems‚ offering compatibility and reliable performance. Understanding its capabilities is the first step towards maximizing its benefits.
This installation manual serves as your comprehensive guide‚ walking you through each stage of the process – from initial setup and wiring to programming schedules and utilizing advanced features. We’ll ensure you can unlock the full potential of your new thermostat‚ providing years of reliable and efficient operation.
Package Contents & Verification
Upon opening the package‚ carefully verify that all components are present and undamaged. Your Honeywell Th6220U2000 package should include the thermostat base‚ the thermostat display unit‚ mounting screws and anchors‚ wire labels‚ and this comprehensive installation manual.
A quick visual inspection is crucial. Check for any signs of shipping damage to the thermostat itself or the packaging. Ensure the display screen is intact and free from cracks. Confirm the presence of the wire labels – these are essential for accurate wiring during installation.
If any items are missing or appear damaged‚ do not proceed with the installation. Contact Honeywell support immediately for assistance and replacement parts. Proper verification now prevents potential issues and ensures a smooth‚ trouble-free setup process. Retain the original packaging for potential returns or warranty claims.
Safety Precautions & Warnings
Electrical Safety is Paramount! Before commencing any installation work‚ always disconnect power to your heating and cooling system at the breaker box or fuse panel. Failure to do so could result in severe electrical shock or damage to the equipment.

This installation should only be performed by a qualified technician if you are unfamiliar with electrical wiring. Improper wiring can create a fire hazard or damage the thermostat and your HVAC system. Wear appropriate safety glasses during installation to protect your eyes.
Caution: Do not install the thermostat in a location exposed to direct sunlight‚ extreme temperatures‚ or moisture. These conditions can affect its accuracy and lifespan. Keep the thermostat away from flammable materials. Always follow local electrical codes and regulations.
Tools Required for Installation
Preparation is Key! To ensure a smooth and efficient installation of your Honeywell Th6220U2000 thermostat‚ gather the following tools beforehand. A Phillips head screwdriver is essential for mounting the base and securing wiring connections. A flathead screwdriver may also be useful for certain terminal screws.
You’ll need wire strippers to carefully expose the wire ends for secure connections. A wire connector tool (wire nuts) is crucial for joining wires safely and effectively. A level will guarantee the thermostat base is mounted straight‚ ensuring accurate temperature readings.
A digital multimeter is highly recommended for verifying power is off and testing wire continuity. Pliers can assist with bending and manipulating wires; Finally‚ a pencil for marking screw locations and a drill with appropriate bits (if needed) will complete your toolkit.
System Compatibility Check
Before you begin‚ verify compatibility! The Honeywell Th6220U2000 is designed to work with most 24V heating and cooling systems‚ including furnaces‚ heat pumps‚ and air conditioners. However‚ it’s crucial to confirm your system’s voltage and wiring configuration.
Important: This thermostat is not compatible with line voltage systems (120V or 240V). Check your existing thermostat’s wiring; if it uses thicker wires directly connected to mains power‚ do not proceed. The Th6220U2000 supports single-stage‚ multi-stage‚ and heat pump systems.
Ensure your system doesn’t require a “C-wire” (common wire) for continuous power; if absent‚ a C-wire adapter may be necessary. Review your HVAC system’s documentation or consult a qualified technician if you’re unsure about compatibility. Incorrect installation can damage your system.

Wiring Diagram Overview
Understanding the Connections: The Th6220U2000 utilizes a standard color-coded wiring scheme for easy integration with your existing HVAC system. Common terminals include Rh (heating power)‚ Rc (cooling power)‚ W (heat)‚ Y (cool)‚ G (fan)‚ and C (common – optional‚ but recommended).
Refer to the detailed wiring diagram included in this manual and on the thermostat’s backplate. Carefully identify each wire connected to your old thermostat and label them accordingly before disconnecting. Incorrect wiring can lead to system malfunction or damage.
The diagram illustrates typical configurations for various system types. If your system differs‚ consult a qualified HVAC technician. Pay close attention to jumper settings if applicable. Double-check all connections before powering on the system.

Step-by-Step Installation Process
Preparation is Key: Begin by completely shutting off power to your HVAC system at the breaker box. This is a crucial safety precaution. Remove your old thermostat from the wall‚ carefully noting the wire connections. Label each wire with the provided stickers‚ matching the terminal designations.
Mounting & Wiring: Secure the Th6220U2000 baseplate to the wall using the provided screws. Ensure it’s level. Connect the wires to the corresponding terminals on the baseplate‚ referencing the wiring diagram. Gently push each wire fully into its terminal.
Final Steps: Attach the thermostat display unit to the baseplate until it clicks securely. Restore power to your HVAC system at the breaker. The thermostat will power on and guide you through the initial configuration process.
Mounting the Thermostat Base
Location‚ Location‚ Location: Choose a location for your Th6220U2000 that’s away from direct sunlight‚ drafts‚ and heat-generating appliances. This ensures accurate temperature readings. Use a level to mark the screw holes for the baseplate. Carefully drill pilot holes if necessary‚ avoiding existing wiring or plumbing.
Secure Attachment: Align the thermostat baseplate with the marked holes. Use the provided screws and wall anchors (if needed) to securely attach the baseplate to the wall. Ensure the baseplate is flush against the wall and doesn’t wobble. A firm‚ stable mounting is essential for proper operation.
Double-Check: Before proceeding‚ verify the baseplate is level and securely fastened. This prevents issues during wiring and ensures long-term stability.
Connecting the Wiring – Detailed Guide
Safety First! Always turn off power to your HVAC system at the breaker before handling any wiring. Identify your existing wiring – typically labeled with letters like R‚ C‚ W‚ Y‚ and G. Carefully remove the existing thermostat’s wiring‚ labeling each wire as you disconnect it.
Terminal Connections: Refer to the wiring diagram specific to your system. Connect each labeled wire to the corresponding terminal on the Th6220U2000 baseplate. Ensure wires are securely inserted into the terminals – a loose connection can cause malfunctions.
Common Wire (C): A ‘C’ wire is often required for proper operation. If you don’t have one‚ consult a qualified HVAC technician. Double-check all connections before proceeding to the next step.
Attaching the Thermostat Display Unit
Gentle Alignment: Once the wiring is securely connected and verified‚ carefully align the thermostat display unit with the mounted baseplate. Ensure the unit is oriented correctly – it should slide on smoothly without force. Do not force the display unit onto the base; misaligned pins can cause damage.
Secure Connection: Gently press the display unit onto the baseplate until it clicks into place. This indicates a secure connection. Verify the unit is firmly attached and doesn’t wobble. A proper connection is crucial for the thermostat to function correctly.
Initial Check: After attachment‚ briefly restore power to the HVAC system to confirm the display unit powers on. If it doesn’t‚ re-check the wiring and the connection between the display and base.
Initial Power-Up & Configuration
Power Restoration: After securely attaching the display unit‚ restore power to your HVAC system at the breaker. The thermostat should power on automatically‚ initiating the configuration process. Allow a few moments for the system to boot up and perform self-checks.
Date & Time Setup: The thermostat will likely prompt you to set the current date and time. Accurate date and time settings are essential for scheduling and proper operation. Follow the on-screen instructions to input this information correctly.
System Type Selection: You’ll be guided through selecting your heating and cooling system type (e.g.‚ forced air‚ heat pump). Choosing the correct system type ensures optimal performance and efficiency. Refer to your HVAC system documentation if unsure.
Wi-Fi Setup (Optional):
Understanding the Thermostat Display
Main Screen Overview: The primary display showcases the current room temperature prominently. Below this‚ you’ll find the setpoint temperature – the desired temperature your system is working to achieve. Operational modes (Heat‚ Cool‚ Auto‚ Off) are clearly indicated using easily recognizable icons.
Mode Indicators: Pay attention to the mode icons. “Heat” signifies the system is actively warming your home. “Cool” indicates cooling is in progress. “Auto” allows the thermostat to switch between heating and cooling as needed. “Off” disables the HVAC system.
Status Icons: Various status icons provide valuable information. A flame icon indicates active heating‚ a snowflake signifies cooling‚ and a fan icon shows fan operation. Other icons may indicate Wi-Fi connectivity or system alerts.

Menu Navigation:
Programming Basic Heating & Cooling Schedules
Schedule Creation: The Th6220U2000 allows you to create customized heating and cooling schedules to optimize comfort and energy savings. Access the scheduling menu through the thermostat’s interface. You’ll typically define different periods throughout the day – Wake‚ Leave‚ Return‚ and Sleep – each with a specific setpoint temperature.
Period Settings: For each period‚ set the desired temperature and the time it begins. For example‚ you might set a lower temperature for the “Sleep” period to save energy while you’re asleep. The thermostat will automatically adjust the temperature based on your programmed schedule.
Weekday/Weekend Options: You can create separate schedules for weekdays and weekends to accommodate different routines. Ensure the correct day settings are selected when programming each period. Review your schedule regularly to ensure it aligns with your lifestyle.
Advanced Features & Settings
Customization Options: The Th6220U2000 offers several advanced settings to fine-tune your comfort and energy efficiency. Explore options like differential temperature control‚ which minimizes short-cycling of your heating and cooling system. Adjust swing settings to prevent frequent temperature fluctuations.
System Configuration: Access the system settings to configure parameters specific to your HVAC system‚ such as heat pump or conventional furnace type. Proper configuration ensures optimal performance and prevents compatibility issues. Carefully review these settings to match your system’s requirements.
Calibration & Adjustments: The thermostat allows for temperature calibration‚ ensuring accurate readings. Utilize this feature if you notice discrepancies between the thermostat’s display and a trusted thermometer. These advanced features empower you to personalize your comfort experience.
Fan Control Options
Auto Mode: In Auto mode‚ the fan operates only during heating or cooling cycles‚ providing efficient air circulation when needed. This setting conserves energy by avoiding continuous fan operation.
On Mode: Selecting On mode keeps the fan running continuously‚ even when heating or cooling isn’t active. This ensures consistent air mixing and can improve air quality by circulating filtered air throughout your home. However‚ it consumes more energy.
Circulate Mode: The Circulate mode runs the fan intermittently‚ even when heating or cooling isn’t required‚ to maintain consistent temperature distribution and improve air circulation. Customize the circulation frequency to suit your preferences.

Fan Scheduling: Some models allow you to schedule fan operation‚ setting specific times for the fan to run‚ independent of heating or cooling. This provides granular control over air circulation.
Filter Change Reminders
Importance of Filter Changes: Regularly replacing your air filter is crucial for maintaining optimal HVAC system performance and indoor air quality. A dirty filter restricts airflow‚ reducing efficiency and potentially damaging your equipment.
Setting Reminders: The Th6220U2000 allows you to set customized filter change reminders. Access the settings menu and specify the desired interval – typically every 1-3 months‚ depending on usage and filter type.

Reminder Notifications: When the reminder interval is reached‚ the thermostat display will show a notification prompting you to replace the filter. Ignoring these reminders can lead to decreased efficiency and increased energy costs.
Resetting the Reminder: After replacing the filter‚ remember to reset the reminder within the thermostat’s settings to ensure accurate tracking of future filter changes. Consistent filter maintenance extends the life of your HVAC system.
Vacation Mode Setup
Energy Savings While Away: The Th6220U2000’s Vacation Mode is designed to conserve energy while you’re away from home for extended periods. This feature allows you to set a lower heating temperature and a higher cooling temperature‚ minimizing energy consumption.
Activating Vacation Mode: Access the thermostat’s menu and select “Vacation Mode.” You’ll be prompted to enter the start date and duration of your trip. Then‚ set your desired setback temperatures for both heating and cooling.
Automatic Temperature Adjustment: Once activated‚ the thermostat will automatically maintain the set setback temperatures until your specified return date. Upon your return‚ the thermostat will seamlessly revert to your regular programmed schedule.

Customization Options: Some models allow customization of the return time‚ ensuring your home is comfortably heated or cooled upon your arrival. Utilizing Vacation Mode significantly reduces energy waste during absences.
Wi-Fi Connectivity & Mobile App Integration
Remote Control & Monitoring: The Honeywell Th6220U2000 offers seamless Wi-Fi connectivity‚ enabling remote control and monitoring of your home’s temperature via the Honeywell Home mobile app. This feature provides unparalleled convenience and energy savings.
App Download & Account Setup: Download the Honeywell Home app from your device’s app store (iOS or Android). Create an account or log in if you already have one. Follow the in-app instructions to connect your thermostat to your home’s Wi-Fi network.
Remote Access Features: Through the app‚ you can adjust temperature settings‚ view current conditions‚ create and modify schedules‚ and receive alerts – all from anywhere with an internet connection.
Smart Home Integration: The Th6220U2000 is compatible with popular smart home platforms‚ allowing for voice control and integration with other smart devices for a truly connected home experience.
Troubleshooting Common Installation Issues
Power Issues: If the thermostat doesn’t power on‚ verify the C-wire connection is secure. A missing or improperly connected C-wire is a frequent cause. Check the circuit breaker to ensure power is supplied to the HVAC system.
Connectivity Problems: If Wi-Fi connection fails‚ confirm your network password is correct and the thermostat is within range of your router. Restarting both the thermostat and router can often resolve connectivity issues.
Incorrect Temperature Readings: Ensure the thermostat isn’t exposed to direct sunlight or drafts‚ which can affect accuracy. Recalibrate the temperature sensor within the thermostat’s settings menu if needed.
Wiring Errors: Double-check all wiring connections against the wiring diagram. Incorrect wiring can cause system malfunctions. If unsure‚ consult a qualified HVAC technician for assistance.
Error Codes & Their Meanings
E1: Indicates a loss of communication with the heating or cooling system. Verify wiring connections and system power. E2: Signals a sensor malfunction – typically the room temperature sensor. Contact support for replacement. E3: Points to a faulty relay within the thermostat; professional service is required.
E4: Suggests a low battery level (if applicable). Replace batteries immediately. E5: Denotes a Wi-Fi connectivity issue. Check network settings and router functionality. E6: Highlights an issue with the outdoor sensor (if installed); inspect wiring and sensor placement.
E7: Indicates a short circuit in the wiring. Immediately disconnect power and inspect wiring for damage. E8: Signals a call for heat when cooling is selected‚ or vice versa – a wiring error is likely. Consult the wiring diagram.
Regular Maintenance & Cleaning
Maintaining your Th6220U2000 ensures optimal performance and longevity. Dust accumulation can affect sensor accuracy‚ so gently wipe the thermostat’s exterior with a soft‚ dry cloth every month. Avoid using liquids or abrasive cleaners‚ as these can damage the display and internal components.
Periodically inspect the wiring connections to ensure they remain secure and free from corrosion. Do not attempt to disassemble the thermostat beyond removing the display unit for battery replacement (if applicable). Check the air filter regularly (as per filter manufacturer’s recommendations) as a dirty filter impacts system efficiency.
Annual professional HVAC system check-ups are also recommended to maintain overall system health. Proper maintenance extends the life of your thermostat and heating/cooling system.
Resetting the Thermostat to Factory Defaults
Resetting your Th6220U2000 to factory defaults clears all personalized settings‚ schedules‚ and Wi-Fi configurations‚ returning it to its original out-of-the-box state. This is useful for troubleshooting or preparing the thermostat for a new user. Please note that this action is irreversible‚ and you will need to reconfigure all settings afterward.
To initiate a factory reset‚ navigate to the settings menu on the thermostat display. Locate the “Reset” or “Factory Defaults” option – the exact wording may vary slightly. Confirm your selection when prompted. The thermostat will then restart‚ erasing all custom data.
Be sure to document your current settings before resetting‚ if you intend to restore them later. Following a reset‚ you’ll need to repeat the initial configuration process‚ including Wi-Fi setup and schedule programming.
Replacing Batteries (If Applicable)
The Honeywell Th6220U2000 may operate primarily on household power‚ but often includes battery backup for maintaining settings during power outages. Low battery indicators will appear on the display‚ signaling the need for replacement. Typically‚ the thermostat uses two AA alkaline batteries‚ readily available at most retailers.
To access the battery compartment‚ gently remove the thermostat display unit from its baseplate. Locate the battery cover‚ usually on the back of the unit‚ and open it. Replace the old batteries with fresh ones‚ ensuring correct polarity (+ and -). Securely close the battery cover and reattach the display to the baseplate.
Regular battery checks are recommended‚ especially during periods of frequent power fluctuations. Proper battery maintenance ensures uninterrupted operation and preserves your programmed settings.
Warranty Information & Support
Honeywell stands behind the quality of the Th6220U2000 thermostat with a comprehensive warranty. This typically covers defects in materials and workmanship for a period of one year from the date of purchase. Proof of purchase is required for all warranty claims. The warranty does not cover damage resulting from improper installation‚ misuse‚ or accidental damage.
For warranty service or technical support‚ please visit the official Honeywell Home website or contact their dedicated customer support team. Online resources include FAQs‚ troubleshooting guides‚ and downloadable manuals. You can also reach support via phone or email‚ with contact details readily available on their website.
Registering your product online extends access to exclusive updates and support resources. Honeywell is committed to providing excellent customer service and ensuring your satisfaction.
Frequently Asked Questions (FAQ)
Q: Is professional installation required? A: While not mandatory‚ professional installation is recommended to ensure proper wiring and system compatibility‚ maximizing performance and safety.
Q: Can I use this thermostat with my existing wiring? A: Generally‚ yes‚ but a system compatibility check (see section 5) is crucial. Some systems may require a C-wire adapter.
Q: How do I reset the thermostat? A: Refer to section 14 for detailed instructions on resetting to factory defaults. This resolves many common issues.
Q: What if my thermostat isn’t connecting to Wi-Fi? A: Ensure your Wi-Fi network is 2.4GHz‚ and double-check your password. See section 13 for further troubleshooting.
Q: Where can I find additional support? A: Visit the Honeywell Home website for FAQs‚ manuals‚ and contact information.

Technical Specifications
Model Number: Th6220U2000
Power Source: 24 VAC‚ Common (C) wire recommended‚ battery backup optional.
Temperature Range: 32°F to 90°F (0°C to 32°C) – adjustable.
Display Type: Backlit LCD with adjustable brightness.
Connectivity: Wi-Fi (802.11 b/g/n)‚ 2.4 GHz.
Relay Capacity: 20A at 24 VAC (heating and cooling).
Dimensions: 4.7 x 3.1 x 1.2 inches (119 x 79 x 30 mm).
Operating Humidity: 5% to 95% non-condensing.
Compatibility: Compatible with most 24 VAC heating and cooling systems.
Certifications: UL Listed‚ FCC Part 15 compliant.
Programming: 7-day programmable with up to 4 periods per day.
App Support: Honeywell Home mobile app (iOS and Android).