Sterling SDA Series 25-100 5-2Preventative Maintenance, Servicing Process Air Filters, Vacuuming

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5-2 Preventative Maintenance

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 9: Air Filter Location and Disassembly

Air In

Air Out

Filter Housing

Clamp	Thumb Nut

	Filter	Dust Can
	Cartridge	Dust Can
	Cartridge

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.

15, 30, & 60 cfm Compact Dryers

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Contents SDA Series 15-60cfm Compact Dehumidifying Dryers In the Event of Shipping Damage Shipping InformationUnpacking and Inspection If the Shipment is Not CompleteCHAPTER 1 SAFETY Table of ContentsCHAPTER 3 INSTALLATION CHAPTER 2: FUNCTIONAL DESCRIPTIONCHAPTER 7 APPENDIX CHAPTER 5 MAINTENANCECHAPTER 6 TROUBLESHOOTING 15, 30, & 60 cfm Compact DryersChapter 1 Safety 1-1How to Use This ManualSafety Symbols Used in this Manual Read Operation and Installation Manual 1-2Safety Tag Information1-3Warnings and Precautions Dryer Safety Tags1-4Responsibility General ResponsibilityOperator Responsibility REMEMBER Maintenance Responsibility Reporting a Safety Defect2-2General Description Chapter 2 Functional Description2-1Models Covered in This Manual What is desiccant?Mechanical Features 2-3Standard FeaturesFigure 1 Typical Dryer Air Flow Schematic Electrical Features2-5Safety Devices and Interlocks 2-4OptionsController Features Safety Circuit Standards Safety Device Lock-OutsFail Safe Operation Chapter 3 Installation 3-1Uncrating the Equipment3-2Rigging and Placing the Dryer POWER ON 15, 30, & 60 cfm Compact DryersDEW POINT 3-3Electrical Connections Checking for Proper Blower Rotation 3-4Setup ProceduresThree-PhaseModels Floor Mount ModelsDrying Hopper Air Trap Considerations 3-5Initial Start-upInstalling Water Lines Optional AftercoolerAuto-Tuningthe Dryer Shutting Down the DryerSwitches Chapter 4 Operation4-1Controller Description and Operation Indicator LightsProcess Air Temperature Controller PV SVLit when Control Output 2 is on. Not used in IndicatorLit when Control Output 1 is on. The Out1 IndicatorAdjustment Level Setting the Process Air TemperatureIndicator IndicatorDescription IndicatorName Entering Operating Parameters to Select ModesSetting the High Dew Point Alarm Process Air Dew Point DisplayOptional 4-2Dryer Operation Procedures Controller OperationAlarm Display Messages Valve Motor Time-Out Blower Overload No Alarms HIGH TEMP VALVE MTRHEAT COOL 50 SYSTEM NORMAL PROC BLWREvery Day Chapter 5 Maintenance5-1Preventative Maintenance Schedule Every weekServicing Process Air Filters 5-2Preventative MaintenanceFigure 9 Air Filter Location and Disassembly VacuumingSymptoms of Worn Desiccant 5-3Corrective MaintenanceCleaning with Compressed Air Servicing the Dew Point Monitor+ FIRST AID + Replacing Worn DesiccantFigure 10 Desiccant Bed Location and Disassembly Figure 11 Required Desiccant Amounts 13X TypeProcedures Replacing the Process/Regeneration HeaterWARNING! Hazardous electrical current present Replacement Procedures Replacing/Cleaning the Cooling CoilFigure 13 Cooling Coil Location and Disassembly If used as an after-Cooler 3 to 4 GPM @ 85F8.Inset the four 10-32bolts back in place 9.Turn the water to the cooling coil back on15, 30, & 60 cfm Compact Dryers Chapter 6 Troubleshooting 6-1IntroductionHIGH TEMP HIGH TEMP PROC BLWRAlarm Message CauseAlarm Message VALVE MTRUsing a Thermocouple CauseWarranty Specifications 7-1WarrantyChapter 7 Appendix Warranty Restrictions7-2Technical Specifications Customer ResponsibilitiesAnnex B Information Regeneration MoistureMake Up Air Exhaust 7-3Drawings and DiagramsAftercooler Design Specifications High Pressure Peripheral BlowerExhaust Figure 16 Low Heat Model 120F to 250F Air FlowAfter-Cooler Regeneration MoistureMake Up Air High Pressure Peripheral Blower15, 30, & 60 cfm Compact Dryers 7-4Spare Parts ListDRYER SPARE PARTS LIST 15, 30, 60 cfm Models Mechanical Components15, 30, & 60 cfm Compact Dryers HI-COREDESICCANT DRYER 15/30/60 CFM UNITS15, 30, & 60 cfm Compact Dryers 30 CFMDescription 15, 30, & 60 cfm Compact Dryers 60 CFMDescription 120V CONTROL COMMON PARTS 15, 30, & 60 cfm Compact DryersA0571672 Description7-5Returned Material Policy Credit ReturnsWarranty Returns 7-6Dryer Identification Serial Number Tag7-7Technical Assistance Service DepartmentContract Department 15, 30, & 60 cfm Compact Dryers