Siemens LMV52.440B1 - Additional Tips for Burners with VFD Control

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section5 Page16SCCInc.
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7. Ifworkingonanun‐configuredLMV52,parametersunrelatedtotheVFDmustbesetbefore theVFD
canbestandardized.ThesearethoroughlyoutlinedinSection4under"Configuring
(Parameterizationof)anLMV5withaDefaultParameterSet".Tosummarize,thefollowingmustbe
set:burnerID,fueltrain,actuatoraddresses,actuatordirectionsofrotation,andactuatorspecial
positions.
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8. TheLMV52safetyloopmustbeclosed(high
limit,lowwater,burnerflange,etc...)orthe
standardizationwillnotoccureveniftheLMV52isnotinalarm.
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9. Theburnerswitchmustbeoff(LMV52inputX5‐03.1mustbede‐energized).
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10. TheVFDmustbeinremotemodesothatitwillrespecttherun‐stopconta
ctandtheanalogsignal
fromtheLMV52.
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11. TheLMV52/VFD/blowerarenowreadytobestandardized.Thestandardization processcanbe
initiatedusingthefollowingmenupath:
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Params&Display>VSDModule>Configuration>Speed>Standardization
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SetparameterStandardizationto“activ
ated”.Theairdampershouldthendrivetothepre‐purge
positionandtheVFD/blowershouldrampuptoapproximately60Hz(100%VFD).Afterafew
secondsat60Hz,theVFD/blowershouldrampbackdownto0Hz.Theairdampershouldalso
drivebacktohomeposition.
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12. Checkthestandardizedspeed,whichistheproductofthestandar
dization,usingthefollowingmenu
path:
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Params&Display>VSDModule>Configuration> Speed>StandardizedSp
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For2‐polebl
owers,thestandardizedspeedshouldbe3500RPM,+/‐100RPM.Ifthespeedisoutof
thisrange,th
edrivewasmostlikelynotspannedsothat20mA=62Hz,orthemotorisheavily
loaded(alotofslip).Thesamelogicappliesto4‐polemotors,exceptthespeedshouldbe1700+/‐
100RPM.
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13. IftheLMV52doesnothaveO
2
trim,theairdamperactuatorcanbesetbackto“activated”instead
of“airinfluen”usingthefo llowingmenupath:
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Params&Display>RatioControl>Gas/OilSettings>AirActuator=activated
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AdditionalTipsforBurnerswithVFDControl
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 Mostofthetime,speedfaultsthatareseenontheLMV52arecausedbytheVFDnotbeingableto
deceleratetheblowerwhentheblowerisbeingrampeddown.Iffastramptimesarenotcriticalfor
theapplication,ramptimescanbeincreasedandthisshouldcorrecttheissue.Iffastramptimes
arenecessary,abrakingresistormayalsoberequiredtoachievethefastrampdowntimes.
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