Sterling SDA 1000-5100 Desiccant Tower Assembly, Replacing the Process Heater Electric Dryers

Page 46

6.Inspect the gaskets on each of the covers. Replace if necessary.

7.Re-install the covers.

Figure 17: Desiccant Tower Assembly

Regeneration

Heater Cover.

Heater Element

Mounting Plate.

Viewing Glass, for

checking the status of the desiccant inside.

High

Temperature

Gaskets.

Stainless Steel

Hollow Core

Desiccant Tank

High

Temperature

Gaskets.

Regeneration

Heaters

Access cover can be removed in order to replace desiccant.

Desiccant Tank

Mounting

Platform

Figure 18: Desiccant Replacement Amounts

Dryer	Desiccant Required per Tower
CFM	“13 X”, 8 x 12 Bead	Total
600	175	350
850	175	350
1000	300	600
1250	300	600
1500	300	600
2000	300	1200
2500	300	1200
3000	300	1200

Replacing the Process Heater (Electric Dryers)

Large Dryers have a number of single phase Calrod-type heater elements wired in a delta formation. They are mounted on top of the dryer or to the drying hopper. The number and wattage of the heaters varies with model, voltage, temperature range, etc., but the replacement procedure is the same.

DANGER! Disconnect and lock out power before heater replacement.

Large Dehumidifying Dryers

Maintenance

46

Image 46

Contents SDA Large Dehumidifying Dryers With AP0 Controls Event of Shipping Damage Shipping InfoUnpacking and Inspection If the Shipment is Not CompleteReturns Warranty ReturnsCredit Returns Table of Contents Operation Dryer Identification Serial Number Tag Technical Assistance How to Use This Manual SafetySafety Symbols Used in this Manual Dryer Safety Tags Description Wear Safety Glasses and Work GlovesGeneral Responsibility ResponsibilityOperator Responsibility Maintenance Responsibility Reporting a Safety Defect Models Covered in This Manual Functional DescriptionGeneral Description Process/Regeneration Cycle Regeneration CycleSequence of Operation Controller Description Controller Screen DescriptionsMechanical Features Standard FeaturesElectrical Features Closed-Loop Regeneration OptionsProcess Aftercooler Process Air Dust Collector Recommended Temperature SettingsMaterial Overdrying Protection Mechanical Options Electrical OptionsSafety Device Lock-Outs Safety Devices and InterlocksSafety Circuit Standards Fail Safe OperationPage Rigging and Placing Unit Mechanical InstallationUncrating the Equipment Making Electrical ConnectionsChecking for Proper Blower Rotation Checking Blower RotationMaking Dryer/Drying Hopper Process Air Connections Dryer/Drying Hopper Process Air ConnectionsConnecting Aftercooler/Precooler Cooling Water Optional Aftercooler Components & Flow RatesUsing the Drying Hopper Air Trap Drying Hopper Air TrapProcess Air Temperature Controller SwitchesIndicator Lights ControlsIndicator Name Description Lit when Control Output 1 is on. The Out1Lit when Control Output 2 is on. Not used Lights in the Operation Indicator Section whenSetting the Process Air Temperature E5CN Operating ParametersAdjustment Level Indicator Name Description Tuned prior to dryer startupEntering Operating Parameters to Select Modes ON, OFFProcess Air Dew Point Display Setting the High Dew Point AlarmOptional Setting the Redundant Safety Controller Redundant Safety Controller DisplayWatlow Operating Parameters Manf. setting Initial Start-up Auto-Tuning the DryerOperation Pre-Startup ChecksDryer Operation Procedures Page Material Miser OFF Press + to Enable Alarm Display Messages Auto-Tuning the Dryer Shutting Down the DryerMaintenance 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 Alarm Descriptions AlarmsAlarm Alarm Description Alarm Effect Code Using a Thermocouple Determining Temperature Controller Errors or Sensor ErrorsUsing a Platinum Resistance Thermometer Warranty AppendixAftercooler Design Specifications Technical SpecificationsAnnex B Information Drawings and Diagrams Optional dryer dust collector Spare Parts List Level 3 Mechanical Components Dryer Identification Serial Number Tag Located on back of DryerParts and Service Department Parts Department Service DepartmentTechnical Assistance Sales Department