Article Plan: Honeywell S8610U Manual
This comprehensive guide details the Honeywell S8610U, covering installation, troubleshooting, wiring, safety, and compatibility with various heating systems and gas types.
The Honeywell S8610U Universal Intermittent Pilot Module is a versatile ignition control designed for gas-fired furnaces, boilers, and heating appliances. It offers electronic control for nearly any intermittent pilot ignition system, representing an upgrade for existing standing pilot systems. This module supports both single-rod and dual-rod applications, accommodating both natural gas and LP gas configurations.
The S8610U provides a complete solution for converting conventional systems, including all necessary accessories for adapting existing spark cables. Its core functions encompass ignition sequencing, reliable flame monitoring, and crucial safety shutoff mechanisms. Referencing form 69-1955 provides further detailed information regarding its operation and capabilities, ensuring safe and efficient heating system performance.
Key Features and Applications
The Honeywell S8610U boasts universal compatibility, functioning effectively with vent dampers and a wide range of intermittent pilot ignition systems. Its adaptability extends to both single-rod and dual-rod setups, alongside support for natural gas and LP gas fuels. This module is ideally suited for gas-fired furnaces, boilers, and various heating appliances requiring reliable ignition control.
A key feature is its ability to convert standing pilot systems to intermittent pilot systems using the complete Y8610U kit. However, it’s crucial to note that the S8610U is not intended for use with direct vent, induced draft, or power burner equipment, ensuring proper application and safety.
2.1 Compatibility with Heating Systems
The Honeywell S8610U demonstrates broad compatibility across numerous gas-fired heating systems. It’s designed for use with intermittent pilot ignition systems found in furnaces and boilers, offering electronic control for enhanced efficiency and safety. The module effectively manages ignition sequences, flame monitoring, and safety shutoff functions within these systems.
Specifically, it’s applicable to atmospheric furnaces and residential boilers utilizing gas as a fuel source. However, users must be aware of its limitations; the S8610U is not suitable for direct vent, induced draft, or power burner equipment, highlighting the importance of verifying system type before installation.
2.2 Single-Rod vs. Dual-Rod Applications
The Honeywell S8610U exhibits versatility in its application, functioning effectively in both single-rod and dual-rod ignition systems. This adaptability simplifies upgrades and replacements across a wider range of heating appliances. In single-rod setups, the module utilizes a single flame sensing rod to detect flame presence, while dual-rod systems employ two for enhanced reliability and safety.
For installations utilizing separate spark and sensor rods – a dual-rod configuration – a crucial step involves clipping a specific jumper wire on the control module. This ensures proper functionality and accurate flame sensing, discarding the wire after clipping it close to the circuit board.
2.3 Natural Gas and LP Gas Support
The Honeywell S8610U is designed for broad compatibility, seamlessly supporting both natural gas and Liquefied Petroleum (LP) gas heating systems. This eliminates the need for separate ignition modules based on fuel type, streamlining inventory and simplifying installations for technicians.
Regardless of whether the appliance operates on natural gas or LP gas, the S8610U provides reliable ignition sequence, flame monitoring, and safety shutoff. The module automatically adjusts its operation to suit the specific gas being used, ensuring optimal performance and safety. This universal design contributes to its widespread applicability in residential and commercial heating environments.
Understanding the S8610U Components
The Honeywell S8610U module is a self-contained unit responsible for the entire intermittent pilot ignition process. Key components include the control module itself, which houses the electronic circuitry, and the spark terminal designed for adaptable cable connections.
The control module manages the ignition sequence, flame monitoring, and safety shutoff functions; Its robust design ensures reliable operation in demanding heating environments. The spark terminal accommodates various spark cable types – Rajah, stud, nail, or others – simplifying retrofits. Understanding these core components is crucial for successful installation and troubleshooting.

3.1 Control Module Overview
The S8610U’s control module serves as the central processing unit for the intermittent pilot ignition system. It orchestrates the entire ignition sequence, continuously retrying until a stable flame is established. This module diligently monitors the flame signal, ensuring safe and efficient operation of gas-fired furnaces and boilers.
Internally, sophisticated circuitry manages spark timing, flame rectification, and safety shut-off protocols. The module’s design prioritizes reliability and longevity. It’s a complete system for converting standing pilot systems, offering electronic control for nearly any intermittent pilot application. Proper understanding of its function is vital for effective service.

3.2 Spark Terminal and Cable Adaptability

The S8610U module features a versatile spark terminal designed for broad compatibility with existing spark ignition cables. This universal design accommodates Rajah, stud, nail, or other common spark cable types, simplifying retrofits and installations. The included accessory kit provides the necessary components to adapt the existing cable to the module’s terminal.
This adaptability minimizes the need for complete system replacements, reducing costs and installation time. Ensuring a secure connection between the spark cable and terminal is crucial for reliable ignition. The module supports both single-rod and dual-rod applications, further enhancing its flexibility.
Typical Wiring Connections
The Honeywell S8610U offers flexible wiring options for various heating system configurations. Figure 1 illustrates typical connections, referencing Table 1 for detailed guidance. A key feature is the optional remote 24V sense MV/PV connection, enhancing system monitoring capabilities. Furthermore, dedicated connections are provided for ammeter probes, enabling precise flame current measurement in Amp DC.
Proper wiring is essential for safe and reliable operation. The module supports both standard and remote flame sensing setups. For remote sensing configurations, a specific jumper wire clipping procedure is required to ensure correct functionality, as detailed in section 11.1.
4.1 Remote 24V Sense MV/PV
The Remote 24V Sense MV/PV feature of the Honeywell S8610U allows for enhanced monitoring of the main valve (MV) and pilot valve (PV) status. This connection utilizes a 24V signal to remotely verify the proper operation of these critical components, improving system diagnostics and safety.

Implementing this feature requires careful wiring according to the provided diagrams. It’s particularly useful in systems where direct access to the valves is difficult. Correct implementation ensures the control module accurately detects valve activity, contributing to reliable flame monitoring and preventing potentially hazardous conditions. Refer to Form 69-1955 for detailed instructions.
4.2 Connection for Ammeter Probes
The Honeywell S8610U features dedicated connection points for ammeter probes, enabling precise measurement of flame current in Amp DC. This diagnostic capability is crucial for assessing flame quality and identifying potential issues within the ignition system.
By connecting an ammeter, technicians can accurately determine if the flame current falls within the manufacturer’s specified range. Low or erratic readings often indicate a problem with the flame sensor, gas supply, or burner. This feature aids in efficient troubleshooting and ensures optimal combustion efficiency. Proper probe connection is vital for accurate readings; consult Form 69-1955 for guidance.
Installation Guide
The Honeywell S8610U simplifies converting existing standing pilot systems to more efficient intermittent pilot ignition. The Y8610U kit provides all necessary components and instructions for this upgrade, suitable for atmospheric furnaces, boilers, and heating appliances.
However, it’s crucial to note a significant limitation: the S8610U is not designed for use with direct vent, induced draft, or power burner equipment. Successful installation requires careful adherence to the provided instructions and Form 69-1955. Ensure compatibility before proceeding, and always prioritize safety during the conversion process, following all local codes and regulations.

5.1 Converting Standing Pilot Systems
The S8610U kit, specifically the Y8610U version, is a complete solution for upgrading conventional standing pilot systems to intermittent pilot ignition; This conversion enhances efficiency and safety in gas-fired furnaces and boilers.
The kit includes everything needed to adapt existing spark cables – Rajah, stud, nail, or similar – to the S8610U’s spark terminal. Detailed, easy-to-follow instructions are provided to guide technicians through the process. Remember to consult Form 69-1955 for comprehensive guidance. Proper adaptation ensures reliable ignition and flame monitoring, maximizing the benefits of the upgraded system.
5.2 Limitations: Not for Direct Vent Systems
It is crucial to understand that the Honeywell S8610U module is not designed for use with direct vent, induced draft, or power burner equipment. Attempting to install it in these systems could compromise safety and performance.
The S8610U is specifically intended for gas-fired atmospheric furnaces, boilers, and heating appliances utilizing conventional venting methods. Direct vent systems require different ignition and control strategies. Adhering to this limitation ensures the module operates within its intended parameters, providing reliable ignition and flame monitoring for compatible applications. Always verify system type before installation.
Safety Precautions

Prior to installing or servicing the Honeywell S8610U, always disconnect electrical power to the heating appliance to prevent electrical shock and potential damage to the module. Gas appliances involve inherent risks; proper ventilation is essential during operation and maintenance.
Ensure all gas connections are leak-free after installation, using appropriate leak detection methods. Never operate the appliance if gas odors are present. Qualified personnel should perform all installations and repairs, adhering to local codes and manufacturer’s instructions. Incorrect installation can lead to hazardous conditions, including fire or explosion.
Ignition Sequence and Flame Monitoring
The Honeywell S8610U initiates an ignition sequence by energizing the spark electrode, attempting to ignite the gas flow to the burner. This module provides a continuous retry ignition sequence, enhancing reliability. Once flame is established, the module monitors flame current, ensuring a stable and safe combustion process.
Flame monitoring is crucial for safety; if flame loss is detected, the S8610U immediately shuts off the gas supply, preventing unburned gas accumulation. The module’s sophisticated circuitry distinguishes between a valid flame signal and noise, minimizing false shutdowns and maximizing operational efficiency.
Troubleshooting Common Issues

Addressing issues with the S8610U often begins with verifying power supply and wiring connections. A common problem is ‘No Ignition’ – check the spark electrode gap, gas supply, and ensure proper grounding. Intermittent flame loss can stem from a weak flame signal, dirty flame sensor, or insufficient gas pressure.
Inspect the flame sensor for cleanliness and proper positioning. Verify the remote 24V sense connections if applicable. Measuring flame current with an ammeter probe (as detailed in the wiring diagrams) helps diagnose flame signal strength. Refer to Form 69-1955 for detailed troubleshooting steps and component testing procedures.
8.1 No Ignition
When the S8610U fails to ignite, systematically check several key areas. First, confirm adequate gas supply to the burner. Next, inspect the spark electrode for proper gap and cleanliness – a misaligned or dirty electrode hinders ignition. Verify the grounding connection is secure, as a poor ground can prevent spark generation.
Also, examine the wiring connections to the control module, ensuring they are tight and corrosion-free. A weak or failing spark cable can also be the culprit. Finally, confirm the control module is receiving power. Refer to the detailed wiring diagrams and Form 69-1955 for specific testing procedures.
8.2 Intermittent Flame Loss
Intermittent flame loss with the Honeywell S8610U often points to issues with flame sensing or gas supply stability. Begin by verifying the flame sensor rod is clean and properly positioned within the flame. A dirty or misaligned rod can’t reliably detect the flame, causing shutdown.
Check for fluctuations in gas pressure, as inconsistent gas flow can extinguish the flame. Inspect the vent damper (if applicable) for proper operation. Also, examine wiring connections to the flame sensor and control module for looseness or corrosion. Consult Form 69-1955 for detailed troubleshooting steps and flame current measurement guidance.
Detailed Wiring Diagrams
The Honeywell S8610U utilizes several wiring configurations depending on the heating system and flame sensing setup. Refer to Form 69-1955 for comprehensive diagrams illustrating typical connections for single-rod and dual-rod applications. These diagrams clearly show the wiring for the 24V remote sense (MV/PV), ammeter probe connections for flame current measurement, and the spark terminal.
Pay close attention to the jumper wire configuration for remote flame sensing; clipping this wire is crucial for proper operation in those setups. Diagrams also detail connections for vent dampers and gas valves, ensuring safe and reliable ignition sequences.

Flame Current Measurement
Accurate flame current measurement is vital for diagnosing ignition and flame stability issues with the Honeywell S8610U. The module continuously monitors the flame current in Amp DC, providing a reliable indication of a healthy flame. Connection points for ammeter probes are specifically designed to facilitate this measurement, allowing technicians to assess flame strength.
Low flame current readings can indicate a weak flame, potentially leading to intermittent flame loss or no ignition. Conversely, excessively high readings might suggest a grounding issue. Proper measurement helps pinpoint the root cause of these problems, ensuring safe and efficient operation.
Remote Flame Sensing Configuration
The Honeywell S8610U accommodates both single-rod and dual-rod flame sensing configurations, including remote sensing setups. For installations utilizing separate spark and sensor rods, a crucial configuration step involves clipping a specific jumper wire. This wire, located close to the circuit board, must be carefully clipped and discarded to enable proper remote flame sensing functionality.
Failing to clip this jumper wire when employing remote sensing will result in inaccurate flame detection and potentially compromise the safety shutoff features of the module. This ensures the control module correctly interprets signals from the remote sensor, maintaining reliable operation.
11.1 Jumper Wire Clipping for Remote Sensing
When configuring the Honeywell S8610U for remote flame sensing – utilizing separate spark and sensor rods – a critical step is the precise clipping of a designated jumper wire. Locate this wire on the circuit board; it’s essential to clip it as close as possible to the board itself.
Discard the clipped wire segment after removal. This action disables the internal flame sensing pathway, allowing the module to rely solely on the external, remote sensor. Incorrectly leaving this jumper intact will prevent accurate flame detection, potentially leading to unsafe operating conditions and system malfunction. Proper clipping is vital for reliable remote sensing.
Accessory Kit Contents
The universal S8610U package is designed for ease of installation and includes everything needed to adapt existing spark ignition cables to the control module. This complete kit provides comprehensive, user-friendly instructions, simplifying the conversion process from standing pilot systems to intermittent pilot ignition.
Specifically, the kit contains necessary accessories to accommodate various spark cable types – Rajah, stud, nail, or others – ensuring compatibility with a wide range of heating appliances. This thoughtful inclusion eliminates the need for separate purchases, streamlining the upgrade process and providing a truly universal solution.
Form 69-1955 Reference
For detailed and comprehensive information beyond this quick overview, refer to Honeywell’s Form 69-1955. This document serves as the primary resource for in-depth understanding of the S8610U series control, offering extensive guidance for service technicians and installers.
Form 69-1955 provides expanded wiring diagrams, detailed troubleshooting steps, and complete technical specifications not summarized here. It’s crucial for complex installations or when addressing unusual system configurations. Accessing this form ensures adherence to Honeywell’s recommended procedures and maximizes the longevity and safety of the installed system.
Technical Specifications
The Honeywell S8610U Universal Intermittent Pilot Module is designed for intermittent pilot ignition systems. It supports both single-rod and dual-rod applications, accommodating a wide range of gas-fired furnaces and boilers.
This module operates with a continuous retry ignition sequence, ensuring reliable startup. It’s compatible with both natural gas and LP gas systems, offering versatile installation options. The S8610U provides electronic control for nearly any intermittent pilot system, including those utilizing vent dampers. It’s a complete kit for converting standing pilot systems, but is not suitable for direct vent applications.

Maintenance and Inspection
Regular inspection of the Honeywell S8610U is crucial for safe and efficient operation. Periodically check all wiring connections to ensure they are secure and free from corrosion. Verify the spark terminal and cable are properly adapted and functioning correctly.
Inspect the flame sensor rod for cleanliness and proper positioning; a dirty or misaligned rod can cause ignition failures. Confirm the control module is free from debris and damage. Routine maintenance, guided by Form 69-1955, will help maintain optimal performance and extend the lifespan of the S8610U module within your heating system.
Frequently Asked Questions (FAQ)
Q: Can the S8610U be used on direct vent systems? A: No, the S8610U is not for use on direct vent, induced draft, or power burner equipment. Q: What gas types are supported? A: It supports both natural gas and LP gas applications.
Q: Is a kit needed for standing pilot conversions? A: Yes, the Y8610U is a complete kit for converting standing pilot systems. Q: What about remote flame sensing? A: Clip the jumper wire for separate spark and sensor rods. Refer to Form 69-1955 for detailed guidance and troubleshooting.
Understanding the Universal Design
The Honeywell S8610U boasts a universal design, offering compatibility with a wide range of gas-fired heating systems. This module provides electronic control for nearly any intermittent pilot ignition system found in furnaces and boilers.
Its adaptability extends to both single-rod and dual-rod applications, simplifying installations and replacements. The included accessory kit facilitates easy adaptation of existing spark cables – Rajah, stud, nail, or others – to the module’s spark terminal. This universal approach streamlines the process, reducing the need for specialized components and ensuring broad applicability.
S8610U vs. Other Ignition Modules
The Honeywell S8610U distinguishes itself through its truly universal design and comprehensive functionality. Unlike some modules limited to specific systems, the S8610U supports both natural gas and LP gas, alongside single and dual-rod applications.
Its ability to convert standing pilot systems to intermittent pilot systems offers a significant advantage, providing a complete kit for this upgrade. Furthermore, the S8610U’s integrated ignition sequence, flame monitoring, and safety shutoff features consolidate essential functions into a single, reliable module, simplifying installation and enhancing system safety.
Ordering and Replacement Parts
Securing genuine Honeywell replacement parts is crucial for maintaining the S8610U’s performance and safety standards. Contacting Honeywell Support directly, or authorized distributors, ensures you receive compatible components.
When ordering, have the S8610U’s model number readily available. Common replacement parts include the control module itself, spark terminals, and wiring harnesses. Referencing Form 69-1955 can aid in identifying specific part numbers. Always prioritize original Honeywell parts to avoid compatibility issues and uphold the system’s integrity. Unauthorized parts may void the warranty and compromise safety.
Warranty Information
The Honeywell S8610U Universal Intermittent Pilot Module is covered by a limited warranty against defects in materials and workmanship. The warranty period typically begins from the date of installation, but proof of purchase is essential for claim validation.
This warranty does not cover damage resulting from improper installation, misuse, or unauthorized repairs. Utilizing non-genuine replacement parts can also invalidate the warranty. To initiate a warranty claim, contact Honeywell Support with the model number, date of purchase, and a detailed description of the issue. Refer to the official Honeywell documentation for complete warranty terms and conditions.
Contacting Honeywell Support
For technical assistance, troubleshooting, or warranty inquiries regarding the Honeywell S8610U, several support channels are available. You can access Honeywell’s comprehensive online resources, including FAQs and detailed documentation, through their official website.
Alternatively, direct contact can be made via phone during business hours. A dedicated team of trained professionals is ready to assist with any questions or concerns. When contacting support, have the S8610U model number and date of installation readily available to expedite the process. Refer to form 69-1955 for additional resources and support information.