Sterling 822.00292.00 specifications Options, Closed-Loop Regeneration, Process Aftercooler

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2-5 Options

Closed-Loop Regeneration

An optional regeneration closed-loop valve and heat exchanger can be used to close the regeneration loop during the cooling portion of the regeneration cycle. If this option is enabled on the dryer, air will be bled to the atmosphere until the heating portion of the regeneration cycle is finished. Then, the regeneration closed loop valve will direct air through a water-cooled heat exchanger and back into the regeneration loop (see Figure 3 and Section 3-6: Connecting Aftercooler/Precooler Cooling Water).

 

Figure 3: Closed Loop Regeneration

 

 

Regeneration

 

Regeneration

 

Blower

 

Blower

AD600-AD1500

 

AD600-AD1500

 

Dryer Flow Schematic

Dryer Valve

Dryer Flow Schematic

Dryer Valve

Regeneration Closed Loop

Regeneration

Regeneration Heating is

 

Cooling is Activated

Activated

 

Filter

Regeneration

 

 

 

Filter

 

Optional

 

Optional

 

Regeneration

 

Regeneration

Regeneration

Closed Loop

Regeneration

Closed Loop

Cooler

Cooler

Heaters

Heaters

 

 

 

Regenerarion

 

Regeneration

 

Exhaust

 

 

 

Exhaust

 

 

 

 

Optional

 

Optional

 

Regeneration

 

Regeneration

 

Closed Loop

 

Closed Loop

 

Valve

 

Valve

Left Desiccant

 

Left Desiccant

 

Process Aftercooler

The optional aftercooler cools the moist air returning to the dryer from the drying hopper. The aftercooler can cool the return air from 250ºF to about 150ºF. This maintains the dryer’s efficiency and condenses the unwanted plasticizer from the air stream. The aftercooler requires a cooling water connection (see Figure 4).

Figure 4: Process Aftercooler

Mounting

Brackets

High

Mounting Brackets

Temperature

 

Gasket

 

 

Cooling Coil

 

 

Cooling Coil

Stainless Steel Cooler

 

 

Pipe Gasket

 

 

Housing

 

 

 

Stainless Steel

 

 

 

Cooler Housing

 

 

High

Cooling Coil

 

 

Temperature

 

 

 

Gasket

Cooling Coil

Cooling Coil

 

Cooling Coil

Cover Plate

 

Cover Plate

Pipe Gasket

 

 

 

 

Large Dehumidifying Dryers

Functional Description

17

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Contents SDA 1000-5100 Large Dehumidifying Dryers With AP0 Controls Unpacking and Inspection Shipping InfoEvent of Shipping Damage If the Shipment is Not CompleteCredit Returns Warranty ReturnsReturns Table of Contents Operation Dryer Identification Serial Number Tag Technical Assistance Safety Symbols Used in this Manual SafetyHow to Use This Manual Wear Safety Glasses and Work Gloves Dryer Safety Tags DescriptionOperator Responsibility ResponsibilityGeneral Responsibility Maintenance Responsibility Reporting a Safety Defect General Description Functional DescriptionModels Covered in This Manual Regeneration Cycle Process/Regeneration CycleSequence of Operation Controller Screen Descriptions Controller DescriptionElectrical Features Standard FeaturesMechanical Features Process Aftercooler OptionsClosed-Loop Regeneration Material Overdrying Protection Recommended Temperature SettingsProcess Air Dust Collector Electrical Options Mechanical OptionsSafety Circuit Standards Safety Devices and InterlocksSafety Device Lock-Outs Fail Safe OperationPage Uncrating the Equipment Mechanical InstallationRigging and Placing Unit Making Electrical ConnectionsChecking Blower Rotation Checking for Proper Blower RotationDryer/Drying Hopper Process Air Connections Making Dryer/Drying Hopper Process Air ConnectionsAftercooler Components & Flow Rates Connecting Aftercooler/Precooler Cooling Water OptionalDrying Hopper Air Trap Using the Drying Hopper Air TrapIndicator Lights SwitchesProcess Air Temperature Controller ControlsLit when Control Output 2 is on. Not used Lit when Control Output 1 is on. The Out1Indicator Name Description Lights in the Operation Indicator Section whenE5CN Operating Parameters Setting the Process Air TemperatureTuned prior to dryer startup Adjustment Level Indicator Name DescriptionON, OFF Entering Operating Parameters to Select ModesOptional Setting the High Dew Point AlarmProcess Air Dew Point Display Watlow Operating Parameters Redundant Safety Controller DisplaySetting the Redundant Safety Controller Manf. setting Operation Auto-Tuning the DryerInitial Start-up Pre-Startup ChecksDryer Operation Procedures Page Material Miser OFF Press + to Enable Alarm Display Messages Shutting Down the Dryer Auto-Tuning the DryerPhotocopy this page for your maintenance records MaintenanceMaintenance Schedule Cleaning or Replacing the Process Air Filters Preventative MaintenanceCalibrating the Dirty Filter Alarm Cleaning or Replacing the Regeneration FilterChecking the Dewpoint Control System Replacing the Desiccant Corrective MaintenanceSymptoms of Worn Out Desiccant Replacing the Process Heater Electric Dryers Desiccant Tower AssemblyReplacing the Regeneration Heater Electric Dryers Process Heater Box AssemblyRegeneration Heater Box Assembly Introduction TroubleshootingBasic Troubleshooting Large Dehumidifying Dryers Troubleshooting Alarm Alarm Description Alarm Effect Code AlarmsAlarm Descriptions Using a Platinum Resistance Thermometer Determining Temperature Controller Errors or Sensor ErrorsUsing a Thermocouple Aftercooler Design Specifications Technical SpecificationsAppendix Annex B InformationDrawings and Diagrams Optional dryer dust collector Spare Parts List Level 3 Mechanical Components Located on back of Dryer Dryer Identification Serial Number TagTechnical Assistance Service DepartmentParts Department Sales Department

822.00292.00 specifications

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