Description
The Greenheck 381039 Purge Card is an electronic timing module used in burner control systems to manage the sequence before ignition. It operates as a control interface card that coordinates with compatible burner management controllers, ensuring a defined air-clearing cycle is completed to flame initiation. Typically inserted into the flame safeguard control assembly during setup, it aligns with the main control board for signal synchronization and safe sequencing of operations. This arrangement supports stable burner startup behavior, improves combustion chamber preparation, and maintain consistent ignition control in HVAC systems used in make-up air units.
