TechnicalInstructions LMVSeries
DocumentNo.LV5‐1000
Section7 Page16 SCCInc.
DuringO2Commissioning,AZLSays“O2Setpointmustlie0.1%belowO2RatioControl”or
“O2Setpointmustlie0.1%aboveO2Min”
WhensettingtheO
2
controlcurve,oneofthefollowingmessagesappears:
“O2Setpointmustlie0.1%belowO2RatioControl”
“O2Setpointmustlie0.1%aboveO2Min”.
Ifthisisthecase,checkthefollowing:
1. Ensurethatthereisanabsoluteminimumof0.2%O
2
betweentheO
2
alarmcurveandthe
O
2
ratiocontrolcurveateverypointonthesecurves.
2. Alsoensurethatthe%O
2
thatistobesetontheO
2
controlcurveisatleast0.1%O
2
above
theO
2
alarmcurveand0.1%O
2
belowtheO
2
ratiocontrolcurve.
Note1: Inmostcases,the%O
2
gapbetweenthecurvesshouldbelargerthantheabsolute
minimum.Dependingontheburnercharacteristic,doingthismayalsoleadtomore
trouble‐freeoperation.SeeSection6formoreinformationonthesecurves.
Itispreferabletohavea1to1.5%gapbetweentheO
2
alarmcurveandthe
O
2
controlcurve.
Itispreferabletohavea1.5%gapbetweentheO
2
ratiocontrolcurveand
theO
2
controlcurve.
Note2: WhensettingupthethreeO
2
curves,thesecurvesaresetusingthe%O
2
values
displayedontheAZL5.Thesevaluesaregivenonawetbasis.
Aseparatecombustionanalyzer(whichtypicallymeasuresdry%O
2
)isrequiredfor
referenceandtomonitorCOandNOxproduction.
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