Siemens LMV5 Quick Start Manual page 22

QRA75 UV Flame Scanner
The QRA75 Ultraviolet (UV) flame scanner mounts with a 3/4" – 14 female thread.
The scanner is threaded onto an NPT male thread that is on the end of a flame scanner tube. The
flame scanner tube should be mounted so both the pilot flame and the main flame can be easily
viewed. Glowing refractory is well tolerated by the UV scanner.
A 12 ft pre-made cable must be used.
Please see Section 10-1 for specifications.
Figure 2-4.3 QRA75 Dimensions (inches)
LMV5 QSG Rev 4 Sec 2 Pg 6 www.scccombustion.com