TechnicalInstructions LMVSeries
DocumentNo.LV5‐1000
Section4 Page20 SCCInc.
NOTE:When in a curve point on the right‐hand side of the AZL screen, pressing “Esc” will
bring the cursor back to the left, off of the numbers.Pressing “Esc” again while off of the
numbers will bring up a prompt to ask if the point is to be stored (press “Enter”) or the
changescanceled(press “Esc”).Ifstor eis selected,a barwill r
otate onthe left‐handside of
theAZL5displaywhilethepointisbeingstored.
NOTE:Whenputtinginanewpointthatisnotyetdefined(XXXXshownforthepositionsand
load), pressing “Enter” will put in values for the positions and load from the previous point
basedonloadnumber.Thesevaluesserveasaplacetostartforthenewpoint.
9. WiththeRatioControlCurveslaidoutonpaperorwiththespreadsheet,beginsettingthecurve
pointsfromlowfire(Point1)tohighfire(Point10).Thegeneralprocedureforeachpointisto
match the load number to the fuel flow while maintaining safe combustion. After this is
complete, adjust the air and / or FGR as necessary to achieve safe, efficient combustion and
emissionscomplianceoneachpoint.
10. The following is a summary of what should be achieved for each point on the Ratio Control
Curve:
Forstandardburners(LMV51,orLMV52withoutO
2
trim):
a. Safe,efficientcombustionasverifiedbyacalibratedstackgasanalyzer
b. The%loadmatchingthefuelflowwithin+/‐5%
c. Emissionscompliance
d. SmoothRatioControlCurves(nosharppeaksandvalleys)
Forstandardnozzlemixingburners(noorlow%FGR)andO
2
trim(LMV52):
e. Allpointsathrudabove
f. VSDspeedshouldincreasewithloadinalinearfashion(ifequipped)
g. The%loadmatchingthefuelflowwithin+/‐3%
h. Find andrecord the %O
2
wetcorrespondingtothefuelrichli mit(O2 Alarmvalue)for
eachpointbyprobing*
i. Find and record the %O
2
wet corresponding to the fuel lean limit (O2 MaxValue) for
Point1andPoint10byprobing*
j. Lastbutnotleast,leavethecurvepointssothatthe%O
2
wetis2%higherthanthefuel
richlimit(O2Alarmvalue).Recordthisasthesavedvalueforeachcurvepoint.
Forpre‐mixmeshburnersandnozzlemixingburners(high%FGR)andO
2
trim(LMV52):
k. Allpointsa thrudabove
l. VSDspeedshouldincreasewithloadinalinearfashion(ifequipped)
m. The%loadmatchingthefuelflowwithin+/‐3%
n. Determinethe%O
2
wetcorresponding to thefuelrichlimit(O2 Alarm Value)for each
point.Probingmayormaynotbepossibledependingontheburnerdesign.Also,follow
burnerOEMrecommendations.Mostmeshburnerelementscanbedamagedifruntoo
fuelrich.*
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