Sterling SDAA 25-100 Preventative Maintenance, Servicing Process Air Filters, Vacuuming

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5-2 Preventative Maintenance

This section describes maintenance procedures which will increase the longevity and efficiency of your dehumidifying dryer. Perform them at the regular intervals listed on the dryer checklist on the previous page.

Servicing Process Air Filters

Caution! Operating the dryer without the process air filter installed voids your warranty!

Filter cleaning is an important part of your dryer maintenance program.

Dehumidifying dryers have a single cartridge canister-type filter in the process air loop. The filter protects blowers from plastic fines drawn in from the drying hopper and prevents the desiccant from being contaminated. Regular filter cleaning is essential to keep your dryer operating at peak efficiency.

You can blow or vacuum the dirt out of the filter with compressed air, but remember, it could become damaged from high-pressure blowing.

Recommendations for Cleaning and Replacing Filters

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

•Remove the threaded fastener securing the filter access cover, then remove the cover.

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

Figure 10: Air Filter Location and Disassembly

Process Return

Air Filter

1" Wide x 1/8" Thick High

Temperature Gasket

Vacuuming

Try vacuum-cleaning a soiled filter first. Vacuuming removes most large particles and surface contaminants, and may suffice for the first time you clean a filter. Use a commercial- duty (recommended) or household vacuum cleaner. Vacuum the filter from the air intake (dirty) side only.

Dehumidifying Dryers

Chapter 5: Maintenance

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Contents Sdaa 25-100 15-60 cfm Dehumidifying Dryers Shipping Information Table of Contents Maintenance Service Department Sales Department Contract Department How to Use This Manual SafetySafety Symbols Used in this Manual Wear Safety Glasses and Work Gloves General Responsibility ResponsibilityRemember Operator ResponsibilityReporting a Safety Defect Maintenance ResponsibilityDehumidifying Dryers Safety Models Covered in This Manual Functional DescriptionGeneral Description Electrical Features Standard FeaturesWhat is desiccant? Mechanical FeaturesController Features Safety Devices and InterlocksOptions Safety Device Lock-Outs Safety Circuit StandardsFail Safe Operation Uncrating the Equipment InstallationRigging and Placing the Dryer Machine-Mount Dryer Dimensions Floor-Mount Dryer Dimensions Recommended Dryer Lifting Hardware Suggested Lift Rigging for Cart Mounted DryersSuggested Lift Rigging for Machine Mounted Dryers Electrical ConnectionsMaking Dryer/Drying Hopper Process Air Connections Setup ProceduresThree-Phase Models Checking for Proper Blower RotationDrying Hopper Air Trap Considerations Installing Water Lines Hose and Hose ClampOptional Aftercooler Starting Up the Dryer Auto-Tuning the DryerInitial Start-up Pre-Startup ChecksShutting Down the Dryer Start-up OperationIndicator Lights SwitchesController Description and Operation Lit when Control Output 1 is on. The Out1 Process Air Temperature ControllerLit when Control Output 2 is on. Not used Setting the Process Air Temperature Indicator Name DescriptionLights in the Operation Indicator Section when Identifying Temperature Controller KeysE5CN Operating Parameters Tuned prior to dryer startup Adjustment Level Indicator Name DescriptionON, OFF Entering Operating Parameters to Select ModesProcess Air Dew Point Display Setting the High Dew Point AlarmOptional Setting the Redundant Safety Controller Redundant Safety Controller DisplayWatlow Operating Parameters Mode Parameter Setting range Default Manf. setting Dryer Operation Procedures Model Heating Cooling 15 cfm 30 cfm 60 cfm Page Controller Operation With Optional Alarm Horn & Reset Button Page Alarm Display Messages Shutting Down the Dryer Auto-Tuning the DryerPreventative Maintenance Schedule MaintenancePhotocopy this page for your maintenance records Vacuuming Preventative MaintenanceRecommendations for Cleaning and Replacing Filters Servicing Process Air FiltersServicing the Dew Point Monitor Cleaning with Compressed AirSymptoms of Worn Desiccant Corrective MaintenanceReplacing Worn Desiccant First AIDConsult local disposal regulations for more information Replacing the Process Heater ProceduresProblem Possible cause Corrective action TroubleshootingIntroduction Problem Possible cause Corrective action Check resin manufacturer’s data Using a Thermocouple Determining Temperature Controller Errors or Sensor ErrorsUsing a Platinum Resistance Thermometer Appendix WarrantyWarranty Specifications Warranty RestrictionsOptional Components Warranty LiabilitiesCustomer Responsibilities Annex B Information Technical SpecificationsAftercooler Design Specifications Drawings and Diagrams Spare Parts ListLevel 2 & 3 Spare Parts List Electrical & Mechanical Returned Material Policy Safety Tag InformationWarranty Returns Dryer Safety TagsLocated on back of Dryer Dryer Identification Serial Number TagSales Department Service DepartmentTechnical Assistance Parts Department