Sterling SDA AP-1 specifications Cleaning or Replacing the Regeneration Filter

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Use the following procedure to clean or replace the filter cartridges:

1.Turn off and/or lock out electrical power to the dryer.

2.Remove the hand knobs or clamps securing the filter access cover and remove the cover.

3.Remove the nut on the center retaining rod to remove a filter cartridge.

4.Vacuum, blow out, or wash the filter.

5.Inspect the filter - a damaged filter should not be reused. Check the following:

„Hold a light bulb behind the filter element to find holes, tears, fatigued paper or residual dirt.

„Inspect the end plates—damage here could allow air to bypass the filter.

„Look for rust on the end plates and metal core—rust particles could flake off and contaminate the dryer and resin.

„Check the gasket for damage—a damaged gasket will allow contaminants into the process. Replace if needed.

6.Return the filter cartridge to its original position and tighten the nut on the center retaining rod to secure the filter cartridge.

7.Secure the filter access cover with the hand knobs or threaded fasteners.

Cleaning or Replacing the Regeneration Filter

Large dryers are equipped with a filter in the regeneration air loop located at the back of the dryer. Regular filter cleaning will keep your dryer operating at peak efficiency.

Caution! Operating the dryer without the regeneration air filters installed will void the warranty.

1.Turn off and/or lock out electrical power to the dryer.

2.Remove the knob securing the filter.

3.Remove the filter from the post..

4.Vacuum or carefully blow out the filter with compressed air. If the filter is worn or can't be cleaned, replace it.

5.Slide the filter back onto its post and tighten knob back on the filter.

Calibrating the Dirty Filter Alarm

Your dryer may be equipped with a Dirty Filter alarm. When the alarm sounds, it is time to clean or change the filter. The Dirty Filter alarm is tested and calibrated at the factory, but it can be adjusted in the field. Be sure that your filter is clean, and use the following procedure to calibrate the alarm.

1.Remove the process air return filter element from its housing.

2.Block off approximately 50% of the filter’s surface area to simulate a dirty filter.

3.Reinstall the cartridge and secure the cover.

4.While the process blower is operating, adjust the trim screw on the differential pressure switch until the alarm light just comes on.

Large Dehumidifying Dryers

Maintenance

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Contents SDA Large AP-1 Control Dehumidifying Dryer Event of Shipping Damage Shipping InfoUnpacking and Inspection If the Shipment is Not CompleteReturns Table of Contents Operation Troubleshooting How to Use This Manual SafetySafety Symbols Used in this Manual Dryer Safety Tags Description General Responsibility ResponsibilityOperator Responsibility Maintenance Responsibility Reporting a Safety Defect Models Covered in This Manual Functional DescriptionGeneral Description Process/Regeneration Cycle Sequence of OperationMechanical Features Standard FeaturesAuto Start Timer Electrical FeaturesDewpoint Extend OptionsClosed-Loop Regeneration Drawings and Diagrams Optional dryer dust collector Process Aftercooler Aftercooler Design SpecificationsProcess Air Dust Collector Process Air Dust Collector Recommended Temperature Settings Material Overdrying ProtectionElectrical Options Mechanical OptionsController Options Safety Device Lock-Outs Safety Devices and InterlocksSafety Circuit Standards Fail Safe OperationPage Dimensions and Specifications Denotes availability Mechanical Options Denotes availabilityDenotes availability Rigging and Placing Unit Mechanical InstallationUncrating the Equipment Making Electrical ConnectionsMaking Gas Line Connections Gas-Fired Models Only DescriptionChecking for Proper Blower Rotation Checking Blower RotationMaking Dryer/Drying Hopper Process Air Connections Dryer/Drying Hopper Process Air ConnectionsProcess Air Heater on Drying Hopper Large Dehumidifying Dryers Mechanical Installation Connecting Aftercooler/Precooler Cooling Water Optional Aftercooler Components & Flow RatesUsing the Drying Hopper Air Trap Drying Hopper Air TrapControls Controller DescriptionProcess Air Temperature and Conveying Process Controller Dryer Status Screen Startup ScreenIdentifying Controller Screens Dryer Alarms Help System LOG OFFMain Menu Screen Setting Values Dryer Menu Dryer Status Dryer Setup Over DRY Protect Alarms Auto TuneAuto Start Main Menu Dryer Setup Screen 3 Dryer Setup Screen 2Dryer Setup Screen 4 Overdry Protection Screen 1 Overdry ProtectionOverdry Protection Screen 2 Autotune Alarm History ScreenProcess AutoTune Screen Autostart Timer Screen DEW Point SetupDew Point Setup Screen Auto StartHelp Menu Screen System Setup SET Clock Hour Meters Alarm History StatusHelp Menu System MenuSystem Setup Screen System Backup Service Menu Main Menu System SetupLOW Level Detection Setup Clock Menu Screen Autostart Clock ScreenInput Status Screen Hour Meter ScreenInput Status Output StatusService System Backup ScreenService Menu Screen Alarm Screens Redundant Safety Controller Display Alarm Screen ExampleSetting the Redundant Safety Controller Always put your set point to 30F above set pointLarge Dehumidifying Dryers Controls Operation Start-upUsing the Dryer Status Screen Alarms Alarm DescriptionsShutdown Maintenance Schedule MaintenancePhotocopy this page for your maintenance records Preventative Maintenance Cleaning or Replacing the Process Air FiltersCleaning or Replacing the Regeneration Filter Calibrating the Dirty Filter AlarmChecking the Dewpoint Control System Symptoms of Worn Out Desiccant Corrective MaintenanceReplacing the Desiccant Desiccant Tower Assembly Replacing the Process Heater Electric DryersProcess Heater Box Assembly Replacing the Regeneration Heater Electric DryersRegeneration Heater Box Assembly Basic Troubleshooting TroubleshootingIntroduction Large Dehumidifying Dryers Troubleshooting Using a Thermocouple Determining Temperature Controller Errors or Sensor ErrorsUsing a Platinum Resistance Thermometer Returned Material Policy Warranty ReturnsAppendix Credit ReturnsTechnical Specifications Annex B InformationSpare Parts List Level 3 Mechanical Components Dryer Identification Serial Number Tag Located on back of DryerParts Department Service DepartmentTechnical Assistance Sales Department
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