How are the detector units in a double-loop Fenwal system wired?

In a double-loop Fenwal fire detection system, the detector units are configured in parallel between two complete loops of wire. This parallel wiring ensures that if one detector unit experiences a fault or failure, the remaining detectors in the system can still function properly. Additionally, since the detectors operate in a parallel configuration, multiple units can detect a fire condition simultaneously, providing redundancy and enhancing the system’s reliability.

The parallel arrangement also allows for more efficient monitoring and quicker detection of any potential fire hazard, as each detector operates independently yet contributes to the overall system functionality. Consequently, this design is crucial for maintaining effective fire safety in aircraft.