Sterling 882.00295.00 specifications Process Heater Box Assembly

Page 62

1.Remove the bolts securing the process heater access cover.

2.Sketch the heater wiring configuration so the heaters may be re-wired properly. Heaters are mounted on a common plate of three or six for easy maintenance.

3.Remove the jumper bars and wires for the heater plate assembly(ies) being removed or replaced.

4.Remove the bolts securing the heater plate assembly and slide out the assembly. Avoid damaging the gaskets.

5.Remove individual heaters for replacement by removing the large brass nuts and washers.

6.Re-install the heaters and heater plate assemblies in reverse order, replacing gaskets if necessary.

Caution! Heater loops should not touch each other. "Hot spots" will lead to premature heater failure.

7.Re-install the jumper wires and bars according to the sketch made earlier.

8.Re-secure the process heater access cover.

Figure 16: Process Heater Box Assembly

Stainless Steel

 

 

 

Heater Housing

 

High

 

Cover

 

Temperature

Heater Elements

 

Gasket

 

Double Wall

 

 

 

 

 

 

Stainless Steel

 

 

 

Heater

 

Heater Elements

 

Housing

 

 

 

High

 

Heater Element

 

Temperature

 

Mounting Plate

 

Gasket

 

 

 

Heater Element

 

 

 

Mounting Plate

 

 

Double Wall

 

 

 

Stainless Steel

 

 

 

Heater

 

 

 

Housing

 

 

 

High

 

 

 

Temperature

 

 

Heater Assembly

Gasket

 

 

 

 

 

Gude Bars

 

 

Heater Assembly

Stainless Steel

 

 

Gude Bars

 

 

 

Heater Housing

 

 

 

Cover

 

 

 

Hex Nut For

Heater Element

 

 

Securing the Heater

Mounting Hex Nut

 

 

Wire

High Temperature

Heater Element

 

 

 

Washer

Washer / Gasket

 

 

Heater Wire with

 

 

 

Crimped on Closed

 

 

 

Loop Connector

 

 

 

Heater Mounting

Heater Element

Heater Assembly

 

Bulkhead Fitting

Guide Bar

 

Plate

 

 

 

Replacing the Regeneration Heater (Electric Dryers)

The regeneration heaters are wired in the delta formation, mounted in the core of the desiccant tanks.

DANGER! Disconnect and lock out power before heater replacement.

Large Dehumidifying Dryers

Maintenance

62

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Contents SDA 1000-5100 Series Large Dehumidifying Dryer AP-1 Control Event of Shipping Damage Shipping InfoUnpacking and Inspection If the Shipment is Not CompleteReturns Credit ReturnsTable of Contents Operation Large Dehumidifying Dryers Safety Symbols Used in this Manual SafetyHow to Use This Manual Dryer Safety Tags Description Operator Responsibility ResponsibilityGeneral Responsibility Maintenance Responsibility Reporting a Safety Defect General Description Functional DescriptionModels Covered in This Manual Process/Regeneration Cycle Sequence of OperationMechanical Features Standard FeaturesAuto Start Timer Electrical FeaturesClosed-Loop Regeneration OptionsDewpoint Extend Drawings and Diagrams Optional dryer dust collector Process Air Dust Collector Aftercooler Design SpecificationsProcess Aftercooler Process Air Dust Collector Recommended Temperature Settings Material Overdrying ProtectionController Options Mechanical OptionsElectrical 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 ScreenMain Menu Screen Dryer Alarms Help System LOG OFFIdentifying Controller Screens Setting Values Auto Start Main Menu Dryer Status Dryer Setup Over DRY Protect Alarms Auto TuneDryer Menu Dryer Setup Screen 4 Dryer Setup Screen 2Dryer Setup Screen 3 Overdry Protection Screen 2 Overdry ProtectionOverdry Protection Screen 1 Process AutoTune Screen Alarm History ScreenAutotune Autostart Timer Screen DEW Point SetupDew Point Setup Screen Auto StartHelp Menu Screen System Setup SET Clock Hour Meters Alarm History StatusHelp Menu System MenuLOW Level Detection Setup System Backup Service Menu Main Menu System SetupSystem Setup Screen Clock Menu Screen Autostart Clock ScreenInput Status Screen Hour Meter ScreenInput Status Output StatusService Menu Screen System Backup ScreenService 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 Photocopy this page for your maintenance records MaintenanceMaintenance Schedule Preventative Maintenance Cleaning or Replacing the Process Air FiltersCleaning or Replacing the Regeneration Filter Calibrating the Dirty Filter AlarmChecking the Dewpoint Control System Replacing the Desiccant Corrective MaintenanceSymptoms of Worn Out Desiccant Desiccant Tower Assembly Replacing the Process Heater Electric DryersProcess Heater Box Assembly Replacing the Regeneration Heater Electric DryersRegeneration Heater Box Assembly Introduction TroubleshootingBasic Troubleshooting Large Dehumidifying Dryers Troubleshooting Using a Platinum Resistance Thermometer Determining Temperature Controller Errors or Sensor ErrorsUsing a Thermocouple Warranty AppendixTechnical 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

882.00295.00 specifications

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