
This manual provides comprehensive guidance for installing your Honeywell Pro Series thermostat. From identifying your specific model to troubleshooting common issues, this resource offers step-by-step instructions and helpful tips. It covers everything from safety precautions like turning off power to wiring configurations and system tests ensuring a smooth installation experience.
Identifying Your Thermostat Model
Before commencing the installation process, accurately identifying your Honeywell Pro Series thermostat model is crucial. This step ensures you consult the correct wiring diagrams and specific instructions relevant to your device. Typically, the model number can be found on the thermostat’s packaging, the device itself (often on the back or side), or within the product documentation.
Examine the thermostat for a label or sticker displaying a series of numbers and letters. This alphanumeric code represents the unique identifier for your specific model. Common locations include behind the thermostat faceplate, accessible after gently detaching it from the base, or on the back of the unit itself.
Once you’ve located the model number, cross-reference it with the product documentation or the Honeywell website to confirm its specifications and features. This verification step is important because the Pro Series encompasses various models with distinct capabilities and wiring requirements. Consulting the correct manual will prevent installation errors and ensure optimal performance.
If you encounter difficulty locating the model number, refer to your purchase records or contact Honeywell customer support for assistance. Providing a detailed description of your thermostat’s appearance and features can aid in identifying the model.
Turning Off Power to the HVAC System
Prior to commencing any work on your thermostat, it’s absolutely critical to disconnect power to your HVAC system. This fundamental safety precaution mitigates the risk of electrical shock during the installation process. Locating your home’s breaker box, typically situated in the garage, basement, or utility room, is the initial step.
Once you’ve identified the breaker box, carefully examine the labels associated with each circuit breaker. Search for the breaker that controls your HVAC system, often labeled as “Furnace,” “Air Conditioner,” or “HVAC.” If unsure, consult your home’s electrical panel directory or test breakers by observing whether the HVAC system ceases operation when a particular breaker is switched off.
After locating the appropriate breaker, firmly switch it to the “OFF” position. This action will effectively cut off the electrical supply to your thermostat and HVAC equipment. To ensure safety, it’s advisable to double-check that the system is indeed powered down. Attempt to turn on your furnace or air conditioner using the existing thermostat; if the system fails to activate, power has been successfully disconnected.
For added security, consider placing a piece of tape over the switched-off breaker with a note indicating that HVAC work is in progress. This visual reminder can prevent accidental reactivation of the circuit during the installation process.
Removing the Old Thermostat
With the power safely disconnected, the next step involves carefully removing your old thermostat from the wall. Begin by gently detaching the thermostat body from its base plate. Some thermostats may have screws securing them, while others may simply snap on and off. Consult your old thermostat’s manual if you’re unsure how to detach it.
Once the thermostat body is removed, you’ll be able to access the wiring connections. Before disconnecting any wires, it’s crucial to take a clear photograph of the existing wiring configuration. This photo will serve as a valuable reference during the installation of your new Honeywell Pro Series thermostat.
Next, carefully disconnect each wire from its terminal on the old thermostat. Most thermostats use screw terminals or push-in connectors. If using screw terminals, loosen the screws and gently pull the wires free. For push-in connectors, you may need to use a small screwdriver to release the wire.
As you disconnect each wire, label it with a small piece of tape indicating its corresponding terminal designation (e.g., R, W, Y, G). This labeling process will greatly simplify the wiring process for your new thermostat.
After all wires have been disconnected, remove the old thermostat’s base plate from the wall. This plate is typically secured with screws. Once the base plate is removed, you’ll have access to the wall where you’ll mount the UWP mounting system for your new Honeywell Pro Series thermostat.
UWP Mounting System Installation
The Honeywell Pro Series thermostats utilize a Universal Wall Plate (UWP) mounting system for easy installation. Before you begin, ensure the power to your HVAC system is turned off at the breaker. Open the thermostat package and locate the UWP. Position the UWP on the wall where the old thermostat was mounted, ensuring it covers any existing holes or marks.
Use a level to ensure the UWP is perfectly horizontal. Once leveled, mark the locations for the mounting screws through the designated holes on the UWP. Drill holes at the marked positions using a drill bit appropriate for your wall type. If drilling into drywall, use the provided anchors for added support.
After drilling the pilot holes, align the UWP with the holes and insert the mounting screws. Tighten the screws until the UWP is securely attached to the wall, but avoid over-tightening, which could damage the wall or the UWP. Ensure the UWP remains level during this process.
Once the UWP is securely mounted, you’re ready to proceed with wiring the thermostat. The UWP provides clearly labeled terminals for connecting the wires from your HVAC system. Refer to the wiring diagrams in this manual to ensure correct connections based on your system type.
Wiring Terminal Designations
Understanding the wiring terminal designations on your Honeywell Pro Series thermostat is crucial for proper installation and operation. Each terminal corresponds to a specific function within your HVAC system. Incorrect wiring can lead to system malfunctions or damage, so pay close attention to these designations.
R and Rc: These terminals are for power. ‘R’ is for the 24VAC power from the transformer, while ‘Rc’ is for cooling systems. In many systems, a jumper wire connects R and Rc, but some systems require separate wiring. Ensure the R and Rc terminals are properly configured using the slider tab, depending on whether you have one or two R wires.
Y: This terminal connects to the compressor contactor in your cooling system.
W: This terminal connects to the heating relay in your heating system.
G: This terminal controls the fan relay, which activates the blower fan.
C: This terminal is for the common wire, providing a stable voltage reference. This is often required for smart thermostats.
Other Terminals: Depending on your system, you may also see terminals like AUX (auxiliary heat), E (emergency heat), and L (fault indicator). Consult the wiring diagrams in this manual for specific configurations.
Wiring Conventional Systems (Forced Air and Hydronics)
This section details the wiring procedures for conventional HVAC systems, including both forced air and hydronic setups. Before beginning, ensure the power to your HVAC system is turned off at the breaker box to prevent electrical shock.
Forced Air Systems: Forced air systems typically use a furnace for heating and an air conditioner for cooling. Wiring involves connecting the appropriate wires to the R, W, Y, G, and C terminals on the thermostat. The R terminal connects to the 24VAC power, W to the heating relay, Y to the compressor contactor, G to the fan relay, and C to the common wire.
Hydronic Systems: Hydronic systems use hot water or steam for heating. Wiring usually involves connecting the R and W terminals. The R terminal connects to the 24VAC power, and W connects to the zone valve or circulator pump. Some hydronic systems may also require a C wire for power.
Important Considerations: Verify the wiring configuration of your old thermostat and transfer the wires accordingly. If you are unsure about any connections, consult a qualified HVAC technician. Proper wiring is essential for the correct operation of your heating and cooling system.
Connecting Wires for 1H/1C Systems
This section outlines the wiring process for a 1 Heat/1 Cool (1H/1C) conventional system. A 1H/1C system includes one heating stage and one cooling stage. Before starting, switch off the power to your HVAC system at the breaker box.
Wiring Steps:
- Y Terminal (Compressor Contactor): Connect the wire from your compressor contactor to the Y terminal.
- W Terminal (Heating Relay): Connect the wire from your heating relay to the W terminal.
- G Terminal (Fan Relay): Connect the wire from your fan relay to the G terminal.
- R and Rc Terminals: Ensure the R and Rc terminals are properly configured using the slider tab. If you have one R wire, use a jumper to connect R and Rc. If you have two R wires, connect one to R and the other to Rc.
- C Terminal (Common Wire): If your system has a common wire, connect it to the C terminal.
Thermostat Mounting
After completing the wiring, securely mount the thermostat to the wall using the UWP (Universal Wall Plate). Ensure all wires are neatly tucked back into the wall opening to prevent interference.
Mounting Steps:
- Align the Thermostat: Position the thermostat housing onto the UWP, ensuring it aligns properly with the pins and connectors.
- Secure the Thermostat: Gently push the thermostat onto the UWP until it clicks into place. Some models may have screws to further secure the thermostat to the UWP.
- Level Check: Use a level to verify the thermostat is straight. Make minor adjustments if needed.
- Final Check: Ensure the thermostat is firmly attached to the wall and that there are no loose connections.
- Power On: Turn the power back on at the breaker box. The thermostat should power up.
Important: If the thermostat does not power on, double-check the wiring and power supply. Consult the troubleshooting section for further assistance. Once the thermostat is mounted and powered on, proceed to the Installer System Test to verify the installation.
Installer System Test
After completing the thermostat installation, it’s crucial to perform a system test to ensure that all components are functioning correctly. This test verifies the proper operation of heating, cooling, and fan functionalities.
Initiating the System Test:
- Enter the Advanced Menu: Press and hold the CENTER button and another designated button (refer to your specific model’s manual) for approximately 3 seconds to access the advanced menu.
- Navigate to TEST: Use the up/down buttons to locate the “TEST” option.
- Select System Test: Press the “Select” button to enter the System Test mode.
Performing the Test:
- Cycle Through Functions: Use the up/down buttons to cycle through the available test options: Heat, Cool, Fan, Emergency Heat (if applicable), and Ver (thermostat version information).
- Observe System Response: For each function, observe whether the corresponding HVAC component activates as expected. The heating system should produce warm air, the cooling system should produce cool air, and the fan should circulate air.
- Verify Proper Operation: Ensure that the system responds promptly and efficiently to each test command.
If any issues arise during the system test, refer to the troubleshooting section for guidance.
Troubleshooting
Even with careful installation, issues can sometimes arise. Here’s a guide to troubleshooting common problems encountered with Honeywell Pro Series thermostats:
Symptom: Thermostat is not turning on.
- Verify Power: Ensure the breaker for the HVAC system is on.
- Check Batteries: If applicable, replace the batteries in the thermostat.
- Inspect Wiring: Confirm that the wiring is correctly connected to the terminals.
Symptom: Heating or cooling not working.
- Confirm System Settings: Verify that the thermostat is set to the correct mode (Heat or Cool) and that the setpoint temperature is appropriate.
- Check Wiring: Ensure that the wires for the heating and cooling components are securely connected to the correct terminals.
- Inspect HVAC System: Rule out any issues with the HVAC system itself (e.g., furnace malfunction, refrigerant leak).
Symptom: Fan not working.
- Verify Fan Setting: Ensure that the fan is set to “Auto” or “On” as desired.
- Check Wiring: Confirm that the fan wire is properly connected to the G terminal.
Symptom: Display issues.
- Adjust Brightness: If the display is dim, adjust the brightness settings.
- Replace Thermostat: If the display is malfunctioning, the thermostat may need to be replaced.
If these troubleshooting steps don’t resolve the issue, consult the user guide or contact Honeywell customer support for further assistance.
Finding User Guides and Support
Need further assistance with your Honeywell Pro Series thermostat? Accessing user guides and support resources is straightforward.
Online Resources:
- Honeywell Home Website: Visit the official Honeywell Home website. Navigate to the “Support” section and search for your specific thermostat model to find user manuals, FAQs, and troubleshooting guides.
- Online Search: Use search engines like Google or Bing to search for “Honeywell Pro Series thermostat user manual” or specific troubleshooting queries.
Honeywell Home App:
- App Support: The Honeywell Home app often provides access to user manuals and troubleshooting tips. Check the “Support” or “Help” section within the app.
Contacting Customer Support:
- Phone Support: Call Honeywell customer support at 1-800-468-1502 (or the number provided in your region). Be prepared to provide your thermostat model number and a description of the issue.
Additional Tips:
- Model Number: Have your thermostat model number readily available when seeking support. This ensures you receive accurate and relevant information.
- Detailed Description: Clearly describe the issue you’re experiencing when contacting support. The more information you provide, the better they can assist you.
By utilizing these resources, you can quickly find the information and support needed to resolve any issues with your Honeywell Pro Series thermostat.