صندوق التحكم Honeywell TFI812 mod.5 02601

This entry lists the Honeywell TFI812 mod.5 02601 control box, catalogue article 852.124.119, manufacturer code 02601. It belongs to the category of burner control boxes (flame safeguard relays). A control box of this type manages the entire ignition and safety sequence of a gas or oil burner. It receives the heat demand signal, starts the fan for the pre‑purge period, and verifies that the air pressure switch confirms correct airflow. It then energises the ignition transformer and opens the fuel valve(s) within a defined safety time. The control continuously reads the flame signal from the ionisation electrode (gas) or a UV/IR detector (oil) and locks out if no flame is detected within the safety time. It also drives the modulation components, such as the gas valve or air damper actuator, to regulate burner output. When replacing a control box, the exact series and type designation must match the original. Safety times, supply voltage, flame detection method, and the base or plug pattern are critical parameters that are not interchangeable between series, even within the same brand. A mismatched safety time creates a safety hazard, not just a performance issue. The control box interacts directly with the gas valve, ignition transformer, fan, and pressure switches; any replacement must be selected to work with the existing system components. No further technical details about this specific article are provided beyond its name and codes.