Resideo S87K1008 Ignition Module

The Resideo S87K1008 is a robust direct spark ignition module engineered for high-performance control in gas-fired heating systems. Operating on a 24Vac ignition control circuit, this component is compatible with both natural and LP gas applications. Designed for reliability in the field, the S87K1008 features a 30-second minimum prepurge to ensure combustion chamber safety and an internal high voltage spark generator for consistent electrode arcing. This specific model utilizes two rod flame sense technology, separating the spark and flame sensing functions to provide precise monitoring. With a 4-second ignition trial time and a rapid 0.8-second flame failure response, the module ensures immediate system shutdown or re-ignition attempts to maintain safe operating parameters. As a functional equivalent to the S87K1008/U, this HVAC replacement part is the industry standard for contractors requiring dependable single trial for lockout logic in residential or commercial atmospheric burners.

Key Benefits for Contractors

• Optimized Safety Timing: Features a 30-second prepurge and a 0.8-second flame failure re-ignition time to prevent gas buildup.
• Versatile Fuel Compatibility: Fully rated for use with natural gas or propane ignition systems.
• Advanced Diagnostics: The module’s single trial for lockout design simplifies troubleshooting during service calls by providing clear failure states.
• Integrated High Voltage: The onboard spark generator eliminates the need for external transformers, streamlining the wiring footprint.
• Standardized Installation: Direct replacement for Resideo S87K1008/U, ensuring mounting and terminal compatibility.

Common Contractor Questions

What is the difference between S87K1008 and S87K1008/U?
Technically, there is no functional difference. The "/U" suffix denotes a universal professional grade packaging, but the internal specifications, 24Vac requirements, and timing cycles remain identical.

Can this module be used on a single-rod or local sensing system?
No, the S87K1008 is specifically designed for two rod flame sense (remote sensing) applications. Ensure your burner assembly has separate electrodes for sparking and flame rectification.

How does the lockout logic function on this unit?
This is a 1-trial lockout module. If the 4-second ignition trial fails to establish a flame signal, the module will move directly to lockout, requiring a manual power cycle to reset.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.