Resideo s8701a1034 Direct Spark Ignition Module

Product Description

The RESIDEO s8701a1034 is a direct spark ignition (DSI) module designed for gas-fired heating equipment including furnaces, boilers, and rooftop units. It manages burner startup through a 30-second pre-purge cycle that clears the combustion chamber of residual gas before ignition, followed by an 11-second trial-for-ignition window during which the module delivers spark and monitors flame sensing. If flame is not proven within that window, the module shuts down to prevent unsafe operation. The s8701a1034 integrates with standard 24-volt control circuits and works with compatible gas valves and flame sensing systems. Licensed HVAC technicians install this module as a direct replacement in residential and light commercial heating applications.

The s8701a1034 is suited for residential and light commercial gas-fired heating systems where direct spark ignition is specified. Typical applications include forced-air gas furnaces, hydronic boilers, and packaged rooftop heating units. It is commonly installed as a replacement for failed or unreliable ignition control boards in existing systems. The controlled pre-purge and trial-for-ignition sequence makes it appropriate for systems requiring a defined lockout-on-failure safety protocol.

Key Features

• 30-second pre-purge cycle clears combustion chamber before ignition attempt
• 11-second trial-for-ignition window with automatic safety lockout on flame failure
• Direct spark ignition (DSI) design eliminates standing pilot requirements
• Integrates with standard 24-volt gas appliance control circuits
• Compatible with gas valves and flame sensing systems used in furnaces, boilers, and rooftop units
• Suitable as a replacement ignition control in residential and light commercial heating equipment

Compatibility

Designed as an OEM-style replacement DSI ignition module for residential and light commercial gas furnaces, boilers, and rooftop heating units that use direct spark ignition with 24-volt control circuits.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable local codes and the equipment manufacturer's service instructions. Before beginning work, shut off gas supply to the appliance and disconnect power at the disconnect switch or breaker serving the unit. Verify incoming control-circuit voltage and confirm all wiring connections match the system's existing ignition module wiring schematic before energizing. Do not bypass or jumper any safety circuits during or after installation.

Technical Specifications

• Ignition Type: Direct Spark Ignition (DSI)
• Pre-Purge Duration: 30 seconds
• Trial-for-Ignition Duration: 11 seconds
• Control Circuit Voltage: 24 volts
• Application: Gas furnaces, boilers, rooftop heating units
• Mounting: Residential and light commercial gas-fired equipment

Standard Information

• Brand: RESIDEO
• Manufacturer Part Number: s8701a1034