De Dietrich 97955736 Sicherheitsbox Honeywell DKO976

The De Dietrich 97955736 safety box, listed as catalogue article 336.124.013 and manufacturer codes 97955736 and 336.124.013, belongs to the category of control boxes. Parts of this type are burner controls (flame safeguards) that manage the entire ignition and safety sequence of a burner. They receive the heat demand signal, start the fan for pre-purge, confirm airflow via the air pressure switch, energise the ignition transformer to produce a spark, open the fuel valves, and monitor the flame signal during the safety time. If no flame is detected within that period, the control locks out and must be manually reset. When selecting a replacement control of this type, the exact series and type designation must be matched. Key parameters include the supply voltage, the pre-purge and safety times, and the flame detection method — typically ionisation for gas burners or UV/IR for oil or industrial burners. The control also has a specific base or plug pattern that must align with the mounting arrangement in the burner. Controls of this group are not interchangeable across series, even within the same brand, because mismatched safety times create a hazard rather than a simple operational mismatch. For modern wall-hung boilers, the equivalent component is often an electronic control board (PCB) that is model‑specific. In an installation, this part works directly with the gas valve, the ignition transformer, the fan, the pressure switches, and the flame sensor.