Given the technical nature of these components

Cross-reference your furnace model number or original part stamping

Key Benefits: 44 lb-in torque provides reliable modulation for dampers up to approximately 10 square feet

typically rated for continuous operation up to 180°F

Does the impeller work in low-flow conditions

Siemens Combustion QRA75.A17 Detector 322838-753 Given the technical nature ofThe Siemens Combustion QRA75. A17 is a high precision, self checking UV detector engineered specifically for continuous duty industrial burner applications. Designed for the supervision of gas and oil flames, this ultraviolet flame detector utilizes a high sensitivity UV cell to monitor combustion and ignition spark proving with professional grade reliability. Operating at AC 120 V, the QRA75. A17 features a 69mm detector tube and a built in stepper