Siemens LMV51.140C1 - Suggested O 2 Trim Commissioning - Traditional Nozzle Mixing Burner with no or Low Percentage FGR (Typically LMV52.240)

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page9 Section6
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SuggestedO
2
TrimCommissioning‐TraditionalNozzleMixingBurnerwithNoorLow
PercentageFGR(TypicallyLMV52.240)
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1. Thecommissi oningprocedureassumesthefollowing:
a. AllPre‐RequisitesforanLMV52systemwithO
2
trim(andVSDifequipped)havebeenmet
accordingtoSection4ofthisliterature.
b. TheRatioControlCurveshavebeencommissionedaccordingtoSection4ofthisliterature.
c. Section6ofthisliteraturehasbeenreadand un derstooduptothispoint.
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2. AswasthecasefortheRatioControlCurvesinSection4,thesamefreespreadsheetcanalsobe

usedtoassistinthecommissioningoftheO
2
trim.ThisspreadsheetgraphicallyillustratestheO
2
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curvesaswellasprovidesanorderlywaytorecordthedetailsofhowtheburnerwassetup.
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Figure6‐3:LMVxCurvesSpreadsheet
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3. ThekeytocommissioningtheO
2
curvesquicklyandeasilyiscontainedintheRatioControlCurves.
Specifically,thefollowingmustbeachievedforeachpointontheRatioControl Curves(as
paraphrasedfromSection4ofthisliterature):
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a. Safe,efficientcombustionasverifiedbyacalibratedstackgasanalyzer
b. The%loadmatchingthefuelflowwithin+/‐3%
c. Emissionscompliance
d. SmoothRatioControlCurves(nosharppeaksorvalleys)
e. VSDspeedshouldincreasewithloadinalinearfashion(ifequipped)
f. Findandreco
rdthe%O
2
wetcorrespondingtothefuelrichlimit(O2Alarmvalue)foreachpoint
byprobing.*
g. Findandrecordthe%O
2
wetcorrespondingtothefuelleanlimit(O2MaxValue)forPoint1and
Point10byprobing.*
h. Lastbutnotleast,leavethecurvepointssothatthe%O
2
wetis2%higherthanthefuelrichlimit
(O2Alarmvalue).Recordthisasthe"saved"valueforeachcurvepoint.
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*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.
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