Always verify your incoming line voltage with a multimeter before installation to ensure it matches the 480V requirement

This model typically features a 2-inch FNPT outlet

Can I use a universal harness as a substitute

Typical signs include "sticking" valves that lead to frozen coils

Greenheck 386409 Ignition Control 318518-761 Always verify your incoming lineThe Greenheck 386409 Ignition Control is a critical replacement component engineered for precise flame monitoring and sequencing in high performance makeup air units and commercial HVAC systems. This direct spark ignition (DSI) module provides reliable trial for ignition periods and instantaneous flame sensing to ensure safe burner operation under demanding conditions. Designed to integrate seamlessly with Greenheck gas fired heaters, the 386409