Siemens LMV52.240B1 - Page 141

LMVSeriesTechnicalInstructions 
DocumentNo.LV5‐1000
SCCInc. Page23 Section4
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Mostboilersuseloadcontrollermode"IntLC"whichutilizesthelocaltemperature/pressuresensorand
alocalsetpointenteredthroughtheAZLdisplay.Thefollowingprocedureoutlineshowtosetupthis
mode:
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1. Ifpossible,shutofftheburnerswitch.LettheburnergetbacktoPhase12(standby).
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2. Verifythattheloadcontrollerisinthecorrectmodethroughthefollowingmenupath:
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Params&Display>LoadController>Configuration
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Set parameter LC_OptgMode to "IntLC".Next, verify that the connected pressure or
temperature sensor is configured correctly.In the same menu, set  Sensor Select to
“PressSensor” for a steam boiler or to the appropriate te
mperature sensor for a hot water
boiler.
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3. Ifapressuresensorwasselected,twoadditionalparametersmustbesetinthesamemenu.Set
parameterExtInpX61U/ItomatchthepressuresensorwiredintotheX61terminal.Typically
this will be 0‐10VDC or 4‐20mA and will be printed on the side of the sensor.Next, set
parameterMRangePressSenstothehighrangeofthepressuresensor.Thisistypicallyprinte
d
onthesideofthepressuresensor.
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4. ConfiguresetpointW1(thelocalsetpoint)throughthefollowingmenupath:
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Operation>BoilerSetpoint
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5. Settheturn‐onpoint(SD_ModOn)andtheturn‐offpoint(SD_ModOff)fortheboiler.Theseare
percentagesbasedonthecurrentsetpoint(W1).Themenupathfortheseparametersis:
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 Params&Display>LoadController>ControllerParam
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Typically,theburnerisshutoff10%oversetpointandturnedbackon1%abovesetpoint.
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NOTE:Other pressure / temperature controls or lim
itsonthe boiler must be setabove the
SD_ModOffpressure/temperature.
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NOTE:SD_ModOff and SD_ModOn are only valid for internal load controller modes. If the
LMV5isinanexternalloadcontrollermode,SD_ModOffandSD_
ModOnareignored.
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6. Ifitissafetodoso,turnontheburnerswitch.Ifthe rmalshockisaconcern,allowtheboilerto
warm.Theburnercanbeput inmanualand heldat lowfire ifnecessary throughthe Manual
Operationmenu.
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7. Once the boiler is up to pressure / temperature, is modulating, and is carrying normal load,
adjustthePIDvaluesthroughthefollowingmenupath:
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Params&Display>LoadController>ControllerParam>ContrlParamList
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