Siemens LMV51.140C1 - Page 187

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page15 Section6

*NOTE:Whenprobingthefuelrichlimit,itisnotrecommendedtoexceed200PPMCO(drybasis)
orlessthan1.0%O
2
(wetordrybasis)foranypoint.Whenprobingthefuelleanlimit,itisnot
recommendedtoexceed200PPMCOoradverselyaffectflamestabilityforanypoint.

NOTE:The%O
2
valuesreadanddisplayedbytheLMV52systemarealwaysonawetbasis(%O
2

wet).Mostifnotallexternalexhaustgasanalyzersreadanddisplay%O
2
andothergasesonadry
basis(%O
2
dry).AllO
2
curvesmustbecommissionedusing%O
2
wetvaluesasreadbytheLMV52.
TheexternalexhaustgasanalyzerisusedtoreadCO,NOx,andalsoservesasawaytodouble
checkthe%O
2
wetvalues.Figure6‐11givestheapproximaterelationshipbetween%O
2
wetand
%O
2
dry.

4. MakesurethattheQGO20O
2
sensorhasbeenactivatedforatleast2hoursandisupto
temperature.ThisgivestheZirconiumcelltimetoheat‐soakandalsotoburnoffany
contaminants.Thetemperatureofthecellcanbecheckedifdesiredthroughthefollowing
menupath:

Params&Display>O2Module>ProcessData>QGOSensorTemp

5. Withtheburneroff(Phase12),setthefuelrichlimit(O2Alarmvalue)foreachpoint.Thiscan
bedonewiththeburneroffsincethesevalueshavealreadybeenfoundandrecordedduring
RatioControlCurvecommissioning(seeabove).OnceintotheO2Alarmcurve,simplyenterin
therecordedvalueforeachpointandsaveeachpoin
t.ToaccesstheO2Alarmcurve,usethe
followingmenupath:

Params&Display>O2Contr/Alarm>GasSettings>O2Alarm >O2Alarm

6. Withtheburneroff(Phase12),setthefuelleanlimit(O2MaxValue)basedonthevaluesthat
havealreadybeenfoundandrecordedforPoint1andPoint10duringRatioControlCurve
commissioning(seeabove).Tosetthefuelleanlimit,usethefollowingmenupath:

Params&Display>O2Contr/Alarm>GasSettings>O2Alarm >O2MaxValue

7. Thetarget%O
2
(recordedabove)willbeusedfortheO
2
ControlCurve.TheO
2
ControlCurve
pointsshouldbesettothetarget%O
2
withinabandof(+0.2/‐0.0).

8. Whenitissafetodosoandwhenthereisadequateloadavailable,starttheburner/boilerand
letitwarmuptooperatingtemperature.

9. AccesstheO
2
RatioControlCurveandtheO
2
ControlCurveusingthefollowingmenupath:

Params&Display>O2Contr/Alarm>GasSettings>O2Control

10. OncetheO
2
ControlCurveisentered,Point2shouldbedisplayed.PressingEnteragainshould
drivetheburnertoPoint2ifitisnotalreadythere.WhentheburnerisdrivingtoPoint2,a
carat(>)willbedisplayed.OncetheburnerisatPoint2,acolon(:)willbedisplayed.Iftheaux
3actuatorisusedforFGRandFGR‐Mode
isnotsetfor“Aux3onCurve”,apound(#)indicatesthe
aux3actuatorhasnotreleasedtothecurve.

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