SIEMENS : QRA75.A27

SIEMENS : QRA75.A27

The UV flame detectors are designed for use with Siemens burner controls, for
the supervision of gas or oil flames.

The flame detectors are used for the supervision of gas flames, yellow- or blue-burning
oil flames and for ignition spark proving.

The detector’s UV cell is located behind a swiveling shutter at the front end of the
detector tube which is flanged to the housing. A quartz-glass window protects the tube
and the shutter against dirt. The detector’s housing accommodates a stepper motor to
drive the shutter and the electronics to control the shutter.
QRA5 series E and G differ with regard to the closing interval of the orifice.
Using the AGG16.C adapter, this flame detectors can be mounted either directly on the
burner, on a viewing tube or on a combustion chamber viewing hole.