Quinny 65040-AB manual Pressure Settings, Network Load Delay Time

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Section VIII - Power$ync IIOperation

Network Load Delay Time

In multiple machine network applications, control is passed from machine to machine based on the programmed sequence. In the sequence ‘ABCD’, the ‘A’ machine is the base machine and the ‘D’ machine starts with the pointer. If the system demand for air drops, the ‘D’ machine will pass the pointer to the ‘C’ machine. Further reductions in system demand may trigger the ‘C’ machine to pass the pointer to the ‘B’ machine. An increase in demand would cause the pointer to be passed back to ‘C’ and then back to ‘D’.

When the demand is decreasing, the machine with the pointer passes that control to the next machine in the sequence when it has unloaded and the system pressure is still trying to climb. After a machine has transferred the pointer, it will completely unload, start its shutdown timer and turn itself off.

When the demand is increasing, the load delay time setting allows the controller to wait the programmed number of seconds before loading up, or starting the next machine down the list due to a pressure drop of short duration.

Pressure Settings

NOTE

The following explanation applies to single machine applications and to the base load machine in multiple machine applications. Trim machines, in multiple machine applications, will be held to their assigned pressure bands.

The load pressure is the maximum pressure at which the machine will operate at full capacity. As the demand for air drops, the pressure will rise to the unload pressure. At the unload pressure, all Power$ync IIvalves will open.

At this point, the compressor will not be compressing air. The maximum load and unload pressures are determined by the available motor horsepower and the pressure ratings of various components in the compressor package. The technical data sheets for the individual compressor models show this maximum number.

The differential between the load pressure and the unload pressure cannot be set to less than 5 PSIG. At the maximum setting for both load and unload pressures, the differential will be 15 PSIG. At the minimum load setting (75 PSIG) and the maximum unload setting (125 PSIG, for example), the differential can be great.

To determine the proper pressure and differential settings, several factors must be considered. The first consideration is the actual pressure required in the plant air distribution system to maintain proper equipment performance. For maximum energy efficiency, do not maintain more pressure in the system than is required. Almost all systems have some leaks. More air will pass through a leak at a higher pressure than at a lower pressure. Many pneumatic tools and devices are rated to operate at a particular pressure. Operating them at a higher pressure increases the amount of air that they consume. Increasing the pressure by ten percent will increase the volume consumed by the system by a proportional amount without an associated increase in productivity. It is prudent, therefore, to maintain the lowest system pressure that provides efficient tool and device performance.

The second consideration is the storage capability of the distribution system. A distribution system with little or no storage capacity will operate better with a wider differential between load pressure and unload pressure. Systems that have more compressed air storage capacity (three gallons per cubic foot of compressor capacity or better) can improve compressor energy consumption by using a more narrow pressure differential. The benefit of having adequate storage capacity is a more consistent system pressure and smoother operation of equipment. The differential should be initially set at 15 PSIG. If the system pressure remains steady throughout a typical work cycle, the differential can be reduced to as low as 5 PSIG. If the system pressure fluctuates greatly at 15 PSIG, indicating little system storage capacity, the differential may need to be broadened.

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Quincy Compressor® - QSD™

 

 

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Contents QSD Series Page Table of Contents Section V Maintenance or Service Preparation Standard Warranty Dimensional Data air-cooled Dimensional Data water-cooled Safety Precautions Section I GeneralSafety Alert Symbols Spare Parts Ordering InformationSection II Description General Description Compression Cycle and Air FlowCooling System Lubricating Fluid SystemMoisture Separator Water-cooledCapacity Control System Electrical System Back-up Control Shutdown ConditionsIndicators Safety SensorsMain Power on Light High Discharge Air Temperature LightsSection II Description Section III Installation Moving the Unit to the Installation SiteReceiving LocationPiping Connections Manual Shutoff Valve Piping Fit-upElectrical GuardsWater Flow Water QualityFluid Level Fan RotationSection IV Operating Procedures Prior to StartingStarting the Compressor Stopping the Compressor Normal OperationTemperature Readings Water-cooled Pressure ReadingsStopping the Compressor Emergency Section V Preparing for Maintenance or Service This page Intentionally Left Blank Safety Fluid SpecificationsSection VI Servicing Air Filter Fluid LifePreparation for New Seal Installation Input Shaft SealSeal Installation Airend Sealing SystemSection VII Service Adjustments Pressure SwitchPressure Switch Back-up Operating Mode Adjusting Pressure SwitchThis page Intentionally Left Blank Section Viii Power$ync II Operation Introduction to Power$yncBack-up Mode Operation Do not switch modes with power on the compressorMultiple Machine Operational Mode Auto Dual Time DelaySingle Machine Operational Modes Continuous RunPressure Settings Network Load Delay TimeNetwork Installation Connecting Cable to the Power$ync II Circuit BoardRocker Switch Settings Network Voltage Tests on Power$ync II Systems Network SetupUP/DOWN DEADBAND, F1 EDIT, Enter Return Power-up Displays Start-upSection Viii Power$ync II Operation Compressor in Back-up Mode U19 Memory Failure Contact Your Service RepresentativeDeadband Data Error Press F1 to Clear U19 Data Checksum Error Press F2 to UpdateU19 Data not Initialized Press F2 to Initialize Filter Needs Servicing Please Replace AS Soon AS Possible Start-up Displays Operational DisplaysAdditional Sensors Compressor is StartingCompressor is Unloaded Minutes Left to Shutdown Compressor is UnloadedProgrammed Shutdown Compressor Settings and Maintenance Displays Mode and Pressure DisplaysCompressor Mode of Operation Auto Dual Timed Stop Press F1 Press F2Read Pressure Settings pages 34-35 before Press F1 to change the load and unload pressuresMachine ID Setup Please Wait Network Configuration in ProgressMachine ID for this Compressor Press Enter to Accept Value Before setting or changing a sequence, read Sequence Network DataUP/DOWN POSITION, F1 EDIT, Enter Return UP/DOWN Machine ID, Enter ReturnNetwork Configuration Menu DAY Monday SEQ AbcdDAY Monday SEQ To clear a particular sequence from the memory, press F1 Filter Service Hourmeters Reset Service HourmetersCompressor Hourmeter Menu Compressor Hourmeters Intake Filter HoursPress F1 to Reset Fluid Filter Hours Press Enter to Return Fluid Filter Hours Reset to Press Enter to ReturnPress F1 to Reset Fluid Hours Press Enter to Return Fluid Hours Reset to Press Enter to ReturnCompressor Maintenance Menu Compressor Control Test Time Menu To View Current TimeTo SET Time and Date Time and Date Menu Current Time on this ControlHorsepower Compressor Control Test Menu Unload Valve Test Press F1Unload Press Fluid PressUnit Configuration Date Modem Baud Rate SetupCompressor Diagnostic Menu View Shutdown LOG Network DiagnosticSection Viii Power$ync II Operation ETOL00 FTOL00 Network Connection Data Confidence Indicator is lit, the indicator will remain lit Modem INITIALIZATION** InitF1 to EDIT/ENTER to Accept Value Compressor has Shut Down Emergency Stop Button WAS Pressed Sequence Data Error Press F1 to Clear Schedule Data Error Compressor has Shut Down Take Corrective Action Back-up Mode until all faults have been corrected Inlet Temp Fluid Pressure STG 1 OUT Temp STG 2 in Temp Shutdown Log Messages Emergency Stop PressedMotor Overload STG 2 Discharge RTD Failure Control log has no entries at that point Section IX Troubleshooting Probable Causes Corrective Action Failure to StartSection IX Troubleshooting Unscheduled ShutdownProbable Causes Corrective Action Unscheduled Shutdown Frequent Air Cleaner Clogging High Discharge Air TemperatureProbable Causes Corrective Action Low Air Delivery Frequent Fluid Filter CloggingCompressor does not Unload when there is no Air Demand Too Rapid Cycling Between Load and Unload Pressure Relief Valve Exhausting Excessive Fluid in Buffing Air Vent BowlsWater in Buffing Air Vent Bowls Excessive Fluid in Gearbox Vent BowlLow Delivery Pressure High Interstage PressureErroneous Displays Microprocessor Will Not Display MessagesSection X- Maintenance Schedule Interval ActionDaily Operating Record Quincy Compressor QSD Quincy Compressor QSD