EDM SYSCREW AIR EVO HSE

SYSCREW 380-1260 AIR EVO HSE
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Variable ow hydronic systems
Theindustryisnowmovingtowardsmoreefcientandoptimizedsolutionswiththeimplementationofnewregulations
byECO-DESIGNDIRECTIVES,whichtherebyresultsinenergysavingsonthechillerandhydraulicsystems.
Intraditionalsystems,thepumppowerregulationarecarriedoutonlyinsecondarycircuitwhilepumpsinprimarycircuit
runatxedspeeds,evenwhenthecoolingdemandisverylow.
Furthermore, pumps are sized for maximum design conditions and often with a margin resulting in greater power con-
sumption than required, even when they not required working at full load as the speed is not regulated to meet the
demand.
Inconclusion,pumpsarewastingenergyandmoneywhenthepumpdoesnotadapttheirspeedtothedemand.
Systemairhascomeupwithsmartlogicofmanagingvariableowinverterpumpsthatcanbeappliedforvariousinstal-
lationtypeswithultimategoalofsaving“pumpingenergyconsumption”andimprovingthepartloadperformancesof
the system.
MODE 1 – COMMISSIONING MODE [V2]:
Commissioning mode consists of an inverter with the hydraulic module to adjust the pump speed manually from the chiller
controllerinordertocalibrateitsowratebasedonthesystemloadlosseswithouttheneedofamechanicalmodulat-
ing valve. The units equipped with an integrated hydraulic module allow to obtain a certain level of useful head (point A)
undernominalowconditionsQn. Normally, however, the actual level of system load losses (eg characteristic curve CC2)
bringsthepumptondadifferentequilibriumpoint(pointB), with a Flow Qb greater than Qn.Inthiscondition,besides
havingadifferentowratethanthenominalone(thereforealsoadifferentjumpoftemperature),thereisalsoagreater
absorption of electric power from the pump itself.
Using the commissioning mode allows you to manually set the speed of the pump (example at speed N2 instead of N1)
toobtainthewaterowrateandthetemperaturejumprequiredbythedesignconditions(pointC).Oncetheadjustment
procedureisnished,thepumpwillalwaysworkataxedowrate.Thismodeallowstoconsiderablyreducetheelec-
tric power consumption of the pump with a consequent energy saving. As an example, when pump works at 30 Hz, the
absorbed power consumption of the pump reduces by 80% compared to 50Hz pump operation.
FIGURE1:CHARACTERISTICCURVES&POWERABSORPTIONCURVES