Sterling 882.00291.00 specifications Troubleshooting, 6-1Introduction, High Temp

Page 37
Chapter 6: Troubleshooting

Chapter 6: Troubleshooting

6-1 Introduction

The utmost in safety precautions should be observed at all times when working on or around the machine and the electrical components. All normal trouble-shooting must be accomplished with the power off, line fuses removed, and with the machine tagged as out of service.

The use of good quality test equipment cannot be over-emphasized when troubleshooting is indicated. Use a good ammeter that can measure at least twice the AC and DC current that can be encountered for the machine. Be sure that the voltmeter has at least minimum impedance of 5,000 OHMS-per-volt on AC and 20,000 OHMS-per-volt on DC scales. Popular combination meters, VOM and VTVM can be selected to provide the necessary functions.

Before making haphazard substitutions and repairs when defective electrical components are malfunctioning, we recommend that you check the associated circuitry and assemblies for other defective devices. It is common to replace the obviously damaged component without actually locating the real cause of the trouble. Such hasty substitutions will only destroy the new component. Refer to wiring diagrams and schematics.

Locating mechanical problems, should they occur, is relatively straightforward. When necessary, refer to the parts catalog section.

Alarm Message

Cause

Corrective Action

Dryer Status

 

 

 

 

HIGH TEMP

The process

Make sure the process filter

- Dryer Shuts down:

 

temperature has

is clean. Clean or replace if

- Process blower OFF.

 

exceeded the alarm

necessary.

- Process heaters OFF.

 

set point.

 

- Regen heaters OFF.

 

Double check the alarm set

 

 

point.

- Alarm light is ON

 

The high temperature

 

snap switch of the

Check the positioning of the

- Alarm horn is ON.

 

process heater box

thermocouple inside the air

 

 

has tripped.

inlet of the drying hopper.

 

 

The tip of the thermocouple

 

 

 

 

 

 

should be centered to the

 

 

The high temperature

 

 

snap switch on of the

tube, and not touching any

 

 

regeneration heater

metal part of the tube.

 

 

boxes has tripped

The drying temperature set

 

 

 

point is lower than dryer

 

 

 

capabilities. Check the dryer

 

 

 

specs.

 

 

 

Make sure all the hose

 

 

 

connections are tight.

 

 

 

Make sure the regeneration

 

 

 

timing cycle matches the

 

 

 

specs. If not contact Service

 

 

 

department.

 

 

 

 

 

15, 30, & 60 cfm Compact Dryers

37

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Contents SDA Series 15-60cfm Compact Dehumidifying Dryers Unpacking and Inspection Shipping InformationIn the Event of Shipping Damage If the Shipment is Not CompleteCHAPTER 3: INSTALLATION Table of ContentsCHAPTER 1: SAFETY CHAPTER 2: FUNCTIONAL DESCRIPTIONCHAPTER 6: TROUBLESHOOTING CHAPTER 5: MAINTENANCECHAPTER 7: APPENDIX 15, 30, & 60 cfm Compact Dryers1-1How to Use This Manual Chapter 1 SafetySafety Symbols Used in this Manual 1-3Warnings and Precautions 1-2Safety Tag InformationRead Operation and Installation Manual Dryer Safety TagsGeneral Responsibility 1-4ResponsibilityOperator Responsibility REMEMBER Reporting a Safety Defect Maintenance Responsibility2-1Models Covered in This Manual Chapter 2: Functional Description2-2General Description What is desiccant?Figure 1: Typical Dryer Air Flow Schematic 2-3Standard FeaturesMechanical Features Electrical Features2-4Options 2-5Safety Devices and InterlocksController Features Safety Device Lock-Outs Safety Circuit StandardsFail Safe Operation 3-1Uncrating the Equipment Chapter 3: Installation3-2Rigging and Placing the Dryer 15, 30, & 60 cfm Compact Dryers POWER ONDEW POINT 3-3Electrical Connections Three-PhaseModels 3-4Setup ProceduresChecking for Proper Blower Rotation Floor Mount ModelsInstalling Water Lines 3-5Initial Start-upDrying Hopper Air Trap Considerations Optional AftercoolerShutting Down the Dryer Auto-Tuningthe Dryer4-1Controller Description and Operation Chapter 4: OperationSwitches Indicator LightsPV SV Process Air Temperature ControllerLit when Control Output 1 is on. The Out1 IndicatorLit when Control Output 2 is on. Not used in IndicatorIndicator Setting the Process Air TemperatureAdjustment Level IndicatorName IndicatorDescription Entering Operating Parameters to Select ModesProcess Air Dew Point Display Setting the High Dew Point AlarmOptional Controller Operation 4-2Dryer Operation ProceduresAlarm Display Messages HEAT COOL 50 SYSTEM NORMAL HIGH TEMP VALVE MTRValve Motor Time-Out Blower Overload No Alarms PROC BLWR5-1Preventative Maintenance Schedule Chapter 5: MaintenanceEvery Day Every weekFigure 9 Air Filter Location and Disassembly 5-2Preventative MaintenanceServicing Process Air Filters VacuumingCleaning with Compressed Air 5-3Corrective MaintenanceSymptoms of Worn Desiccant Servicing the Dew Point MonitorReplacing Worn Desiccant + FIRST AID +Figure 11: Required Desiccant Amounts 13X Type Figure 10: Desiccant Bed Location and DisassemblyReplacing the Process/Regeneration Heater ProceduresWARNING! Hazardous electrical current present Figure 13: Cooling Coil Location and Disassembly Replacing/Cleaning the Cooling CoilReplacement Procedures If used as an after-Cooler:3 to 4 GPM @ 85F9.Turn the water to the cooling coil back on 8.Inset the four 10-32bolts back in place15, 30, & 60 cfm Compact Dryers 6-1Introduction Chapter 6: TroubleshootingHIGH TEMP Alarm Message PROC BLWRHIGH TEMP CauseUsing a Thermocouple VALVE MTRAlarm Message CauseChapter 7: Appendix 7-1WarrantyWarranty Specifications Warranty RestrictionsCustomer Responsibilities 7-2Technical SpecificationsAnnex B Information Aftercooler Design Specifications 7-3Drawings and DiagramsRegeneration MoistureMake Up Air Exhaust High Pressure Peripheral BlowerAfter-Cooler Regeneration MoistureMake Up Air Figure 16: Low Heat Model 120F to 250F Air FlowExhaust High Pressure Peripheral BlowerDRYER SPARE PARTS LIST 15, 30, 60 cfm Models 7-4Spare Parts List15, 30, & 60 cfm Compact Dryers Mechanical ComponentsHI-COREDESICCANT DRYER 15/30/60 CFM UNITS 15, 30, & 60 cfm Compact Dryers30 CFM 15, 30, & 60 cfm Compact DryersPart # Description60 CFM 15, 30, & 60 cfm Compact DryersItem Part #A0571672 15, 30, & 60 cfm Compact Dryers120V CONTROL COMMON PARTS ItemCredit Returns 7-5Returned Material Policy7-7Technical Assistance 7-6Dryer Identification Serial Number TagWarranty Returns Service DepartmentSales and Contracting Department Parts and Service Department15, 30, & 60 cfm Compact Dryers Contract Department
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882.00291.00 specifications

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