Siemens LMV52.240B1 - Page 105

LMVSeries TechnicalInstructions 
 LV5‐1000
SCCInc. Page47 Section3
3‐3:SequenceDiagrams
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The Siemens LMV5 BMS can perform a number of different burner sequences based upon how certain parameters are set.
Althoughthereareanumberofparametersthataffectsmallaspectsoftheburnersequence,themainparametersthataffectthe
sequenceareparametersFuelTrainGasandFuelTrainOil.
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TheseparameterssettheframeworkofthesequenceandarebaseduponthefueltraindiagramsinSection4.TheOEMhasthe
optionofselectingoneofthreedifferentgastrainswiththeirassociatedsequencediagrams,andoneoffourdifferentoiltrains
withtheirassociated sequencediagrams(the sequencediagramsand fueltraindiagramsfordirectsparkignition withheavyoil
havebeenomitted).
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ThesequencediagramsinSection3‐3illustratewheninputandoutputterminalsareexpectedtobe energizedorde‐energized.A
legendonthebottomofeachpagedescribesthevarioussymbolsusedinthediagrams.Thelastdiagramdescribeswhatpositions
the attached actuators are expected to achieve at each phase and outlines the method that is used to check the actuators
position.
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Notes:
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1) Onlyonefuelselectterminalcanbeenergizedatatime.Ifbothterminalsareenergized,theLMV5willgointolockout.If
neitherterminalisenergized,fuelselectionisinternalthroughtheAZL5(FuelSelect)orviaModbus.
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2) Theexternalburneron/offswitchcanbedisabledwithparameterInputController.Ifactivated,thisterminalneedstobe
energized to have the LMV5 start its sequence.The function of terminal X5‐03.1 becomes “burner on / off” when any
externalloadcontrolmodeisselected.
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3) ThealarmcanbesilencedthroughtheAZL(Alarmact/deact).ThisalarmsilenceresetswhentheLMV5isresetorrestarted.
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4) Whenusingan LMV52, continuouspilotispossible (ContPilotGas /ContPilotOil).Ifcontinuouspilot isactivated,the pilot
valvewillremainenergizedthroughphase62.
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5) IfparameterGasPressureMinissettoactivated,thelowgaspressureswitchisexpectedtoremainclosedduringphases21‐
50ofLOwGaspandHOwGasp,ensuringadequategaspressureforthepilot.IfGasPressureMinissettoDeactxOGP,the
lowgaspressureswitchisexpectedtoremainclosedonlywhenfiringgasandisnotcheckedwhenfiringoil.
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