Resideo S87D1004 Ignition Module

Direct Spark Ignition Module, 24Vac, .8 Second Flame Failure Response Time, No Prepurge, Single Trial for Main Burner (Then Shut Down and Lockout), Natural or LP Gas, Two Rod Flame Sense, 6 second Lockout Timing, 6 Second Ignition Trial Time, Includes Alarm Terminal

S87D1004 is the direct replacement for 8429-03R, 1147669

Resideo S87D1004 Ignition Module – 24VAC Direct Spark Ignition Control for Natural or LP Gas Systems

The Resideo S87D1004 Ignition Module is a reliable, low-voltage direct spark ignition control designed for use in gas-fired furnaces, boilers, and other heating appliances. This solid-state module features direct spark ignition (DSI) with a built-in high-voltage spark generator, ensuring consistent and safe burner ignition with no pre-purge required.

Engineered for efficiency and safety, the S87D1004 provides a single ignition trial, followed by system lockout if flame is not established, enhancing protection for your system. With a 6-second lockout timing, 0.8-second flame failure response time, and compatibility with both natural gas and LPG, this ignition module is ideal for a wide range of residential and commercial applications.

Key Features:

• Operating Voltage: 24–25 VAC, 60 Hz

• Ignition Type: Direct Spark Ignition (DSI)

• Fuel Compatibility: Natural Gas, LP Gas

• Flame Sensing: Two-rod flame sense system

• Ignition Trial Time: 6 seconds

• Flame Failure Response: 0.8 seconds @ 5.0 microamp

• Lockout Timing: 6 seconds

• Number of Trials: Single trial, then shut down and lockout

• Includes: Alarm terminal

• No Prepurge Cycle for faster ignition sequence

Specifications:

• Compatible Ignition Hardware: Q347A, Q354, Q366

• Compatible Gas Valves: VR8205, VR8305

• Maximum Valve Load: 2A

• Operating Temperature Range: -40°F to 175°F (-40°C to 79°C)

• Dimensions:

  • Height: 5.25 in (133 mm)

  • Width: 4.06 in (103 mm)

This Resideo OEM ignition control module is built for dependable performance, quick flame detection, and fast shutdown in fault conditions—making it a critical component for safe and efficient heating system operation.