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Figure 9. TYPICAL SCANNER INSTALLATIONS
OPERATION — 45UV5 & 55UV5 SELF-CHECKING UV SCANNER
Self-checking ultra-violet scanners are used in applications where burner firing operation is continuous or where the burner is
on for long periods of time without recycling and UV detection is the best alternative. In addition, ultra-violet self-checking
systems are mandatory in some locations. The operation of this type of system consists of always maintaining the flame scanning
capability while also proving that the ultra-violet tube is firing properly. Do this periodically by mechanically closing off the
sight of the UV tube. Check to make sure that the flame signal goes away. A shutter assembly in the 45UV5 scanner performs
this function. The diagram below explains the process further. If the shutter assembly in the scanner fails, the tube is faulty,
or there is insufficient power to the scanner, the BurnerLogix will LOCKOUT and display the following message LOCKOUT
CHECK SCANNER. The ultra-violet tube is replaceable (P/N 4-314-1). A lockout results if a minimum signal is detected for
three consecutive shutter closed periods.
Figure 10. UV SELF CHECK SCANNER OPERATION
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