Oil Free Scroll Air Compressors - Hitachi America, Ltd.

Oil Free Scroll Air CompressorsEnergy EfficiencyHITACHI Control MethodologyHitachi's Microproccessor control ensures the greatest efficiency of operation.Proprietary control logic provides package performance under a variety of conditions.Versatility of DesignCycle Control LogicHitachi’s unique pressure control method provides high reliability. When maximum pressureis set low for energy saving, short cycle of On-Off may occur. In that case, the maximumpressure is automatically raised to elongate the On-Off cycle and ease the excessive restartingfrequency.HITACHI Multi-Drive Control (applicable on 7.5 kW-16.5 kW models)Multi-Drive control method is added to the conventional Pressure Switch Control method.Rated Maximum(Unload / Stop) PressureCount Frequency ofRestartAutomatic settings of Max. pressureto avoid excessive ON/OFF freqency.It is also possible to easily change between Multi-Drive control and Pressure Switch controlby operation of switch button. Under Multi-Drive control mode, the operation of SRL heads ismodified automatically responding to the need of air. So, optimized operation which can keepthe necessary pressure is possible.User Setting Maximum(Unload / Stop) PressureAuto-SettingUser Setting Minimum(Load / Start) PressureMulti-Drive ModeConventional P-mode Multi-Drive mode Energy-SavingThe operation of the compressor is automaticallyOperationOperation Effectcontrolled to ensure that the pressure is kept at theON-OFF ON-OFF5 6necessary pressure (control pressure).Unnecessary power consumption is prevented by notallowing the pressure to reach the maximum pressure.Therefore energy-saving is realized.P-ModeOperates the same as the conventional Pressure SwitchControl method. If the pressure reaches the maximumpressure, the operation of compressor will stop.Then when the pressure decreases to the cut-in pressure,the operation of compressor will automatically restart.PressureConventional P-mode OperationMulti-Drive mode OperationTimeMax. PressureControl PressureCut-in PressureCycleCycle(elongated)Maintenance FriendlyHITACHI Oil Free Scroll Compressors are constructed to enable easy accessibility forinspection and maintenance. Incorporation of leading technologies allows the finalproduct to consume less space, enabling conservation of the work environment.Control PanelSecondary CoolerHITACHI Innovative DesignHitachi's unique tip seal with special material provides:- Increased Performance (Low Leakage)- Extended Service Intervals- High EfficiencySuctionFiltersScrollHeadDual AirReceiver TankStarter Panel (UL) Motor Ventilation FanPrimary Cooler