Viessmann 7858519 Assembly 320734-701 For the most accurate assessment

For the most accurate assessment of the liquid seal

Verify the 3-inch insert depth and the 170-degree cutout specification before installation

The cast iron housing and oxide-finished steel balls provide the structural integrity required for static load ratings up to 1

always verify your specific model and serial number to ensure electrical compatibility with the control system

and FX4D fan coil platforms

Viessmann 7858519 Assembly 320734-701 For the most accurate assessmentThe Viessmann 7858519 Ignitor Flame Sensor Assembly is a critical OEM component designed for high performance combustion control in industrial and commercial heating systems. This dual purpose assembly streamlines maintenance by integrating the electrode responsible for generating a high voltage spark with a precision flame rectification sensor. By providing real time feedback to the ignition control board, the 7858519 ensures safe burner operation