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Snap-Action Bimetal Disc: Engineered for fast contact separation
ventilation units
check the burner alignment and ensure the venting system is not obstructed
This unit is built to withstand harsh environments with a NEMA 4 enclosure rating and includes VOS2/VCS2 switches for definitive proof of closure (POC) and open position tracking
Key Benefits Superior Protection: The dual-element design handles high inrush currents while providing fast-acting response to sustained overloads
Siemens Combustion QRA73.A17 Detector 318518-761 Snap-Action Bimetal Disc: Engineered forThe Siemens QRA73. A17 is a precision engineered UV flame detector built for continuous supervision in high demand industrial and commercial combustion environments. Designed for seamless integration with LMV5 and LME7 burner management systems, this detector operates on a 110V 120V AC power supply and provides reliable monitoring for gas flames, blue burning oil flames, and ignition sparks. Featuring an integrated self checking mechanism, the unit