Galletti LEW CS/CL 244 [39/56] Technical data of optional hydronic modules

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Page39of56

RG66006951‐Rev.01

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3 Technicaldataofoptionalhydronicmodules

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Hydronicmodules,recommendedasanoptionalfeatureforLEWunits,bringtogether,injustasingle,compactand

silentsolution,themaincomponentsoftheprimarycircuitofthehydraulicsystemservedbyLEWmachines.Each

hydraulicmodulecontainsbothcircuits:

‐ ON/OFFhydraulicpump

‐ Blade‐typeflowswitchtopr

eventicefromforming,whichiscausedbytheevaporationoftherefrigerantinthe

plateheatexchanger.(LEWCDunitshaveaflowswitchontheutilityside,LEWWHunitshaveaflowswitch

bothontheutilityandthesourceside)

‐ Expansionvesseltomanagechangesinvolumeaffecti

ngtheamountofwatercontainedintheLEWunitand

themoduleitself

‐ Safetyvalve(setto3barasstandard)

Themodulehasitsownelectricpanel,whichpowersthepumps,protectsthemwithmotoroverloadprotectionsand

receivestheconsentfromtheLEWunits.ThepowerisnotsuppliedbytheLEWun

it,butdirectlybytheexternalline.

Themoduleisinsulatedtoreducethesoundemissionsofthepumps.

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3.1 Characteristic curves of the hydraulic pumps associated to the units

Thegraphicsdisplayedinthisparagraphshowtheusefulhead(netwiththeinternallossesoftheunits)oftheHP

pumpsandLPpumpsintheoptionalhydronicmodule.

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AtthenominalflowrateslistedinthischapterinTablesIandII,thelow‐pressureLPpumpsprovide60kPaofuse

ful

headontheutilitysideand70kPaonthedissipationside.Thehigh‐pressureHPpumpsprovideausefulheadequalto

140kPaforbothhydrauliccircuits.

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UsefulheadforLEW041,042pumpsonutilityside  UsefulheadforLEW051,052pumpsonutilityside

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UsefulheadforLEW061,062,071,072pumpsonutilityside UsefulheadforLEW081,082pumpsonutilityside

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