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Sterling STT 800 manual STT 5.2. Cleaning/renewing the air filters, Maintenance

Models: STT 800

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STT 800

5.2. Cleaning/renewing the air filters

Press the ”F2”-key.

Select ”Dryer off”.

Acknowledge with the ENTER-key.

Wait until the blowers have stopped turning.

Switch off the dryer at the main switch.

Disconnect the power supply.

Open the upper panel by means of the provided switch cabinet key.

Clogged filters reduce the volume of circulating air to a substantial de- gree and result in decreased dryer efficiency. In addition, the heating ele- ments may be damaged due to clogged filters.

SM2-625

Maintenance 5-4

Page 48

Image 48

Sterling STT 800 manual STT 5.2. Cleaning/renewing the air filters, Maintenance

Contents

Operating Instructions Dehumidified Air Dryer STT with Siemens S7 control unitSterling Material Processing SM2-625Parts and Service Department Sales and Contracting DepartmentSTT Sterling Material Processing Edition 06/02Order confirmation number Page TABLE OF CONTENTS Page Page 1. General Information Dehumidified Air DryerGeneral Information Dehumidified Air Dryer 1.1. Warnings and symbols General Information1.2. Explanations and information 1.3. Legal basis1.4. Fields of applications 1.5. Notes on Usage2. Safety instructions Safety instructionsDehumidified Air Dryer Dehumidified Air Dryer 2.1. For your safety Safety instructionsGeneral Safety instructions AssemblyDehumidified Air Dryer OperationSafety instructions MaintenanceDehumidified Air Dryer 2.2. For the safety of the devices Safety instructionsDehumidified Air Dryer 3. Start-up Start-upSTT 3.1. Control system 3.1.1. Key assignmentStart-up STT 3.1.2. Flow chart Indicator lamp messagesStart-up SM2-625STT 3.2. Switching on the dryer 3.2.1. Operation statusesStart-up 3.4. Passwords STT 3.3. Viewing the software-versionStart-up Login Start-upLogout EditSTT 3.5. Basic parameters 3.5.1. Turning the devices on/offTimer on/off Start-upStart-up Hopper X on/off X = number of the drying hopperSTT 3.5.2. Entering dryer values Start-upRegeneration Heater Act Used air ActStart-up Pre air cooler TargetPre air cooler Act STT 3.5.3. Entering hopper values Start-upHopper entry X Target Hopper entry X ActStart-up Granules target % = C FGranules act. CF STT 3.5.4. Observing processing status e.g. valve block moved in/moved out/errorStart-up STT 3.5.5. Setting date and time Start-upDate TimeSTT 3.5.6. Viewing/changing language and contrast Start-upContrast LanguageSTT 3.5.7. Changing parameters Start-upSelect ”Parameters” Run on time drying blower --300 secSTT 3.5.8. Setting the timer Start-upXX ON 00 00 OFF 00 00 XX = day Mo-Su STT 3.6. Starting continuous operation Start-upSelect ”Main menu” STT 3.7. Viewing system runtime Start-upSelect ”System runtime” System runtimeSTT 3.8. Switching the dryer off Switch off the dryer at the main switchDisconnect the power supply Start-up4. Error and error correction Error and error correctionDehumidified Air Dryer Error and error correction Failures must be repaired immediately LED “ALARM”Dehumidified Air Dryer Error and error correction Dehumidified Air DryerView Error and error correction Dehumidified Air DryerNumber Total messagesError and error correction Dehumidified Air DryerOverflow Overflow warning On/OffError and error correction PLC = SPS Battery is EmptyMain Switch is Off A Safety Temperature Limiter has been ActivatedError and error correction Excess Temperature Regeneration HeaterInsufficient Temperature Regeneration Heater Error Bypass FlapError and error correction Temperature Measurement Drying Heater DefectiveExcess Temperature Drying Heater Insufficient Temperature Drying HeaterError and error correction Temperature Measurement Granules Defective HopperExcess Temperature Granules Hopper Valve Error Hopper5. Maintenance MaintenanceMaintenance Please observe the maintenance scheduleSTT 5.1. Maintenance intervals MaintenanceSTT 5.2. Cleaning/renewing the air filters MaintenanceMaintenance Return air filterMaintenance Regeneration air filterMaintenance Re-installthe cleaned/new filter matFilter of the electrical cabinet Remove the lid of the filterSTT 5.3. Tensioning the V-belts MaintenanceMaintenance Remove the protective grid of the blower position5.5. Servicing the accessories 5.4. Disposing of the drying agentMaintenance 5.6. Changing the battery of the control system MaintenanceMaintenance Store backup batteries in a dry and cool placeOrder number battery SM2-625STT 5.6.1. Resetting the control values Maintenance6. Functional description Functional descriptionSTT 6.1. Dryer Dew point dependent regeneration switch optionalFunctional description STT 6.2. Drying hopper optional Functional descriptionSTT 6.3. Return air cooler optional 6.4. Pre air cooler optionalFunctional description STT 6.5. Hopper heaters optional 6.6. Automatic motor flaps optionalFunctional description 7. Transport, Assembly and Storage Transport, Assembly and StorageDehumidified Air Dryer Dehumidified Air Dryer 7.1. Transport and Packing Transport, Assembly and Storagewith a fork lift truck Transport, Assembly and Storage Dehumidified Air Dryerwith a workshop crane Transport with a workshop crane SM2-625Dehumidified Air Dryer 7.2. Assembly 7.3. StorageTransport, Assembly and Storage 8. Assembly instructions Assembly instructionsDehumidified Air Dryer 8.2. Connection of the air coolers optional Assembly instructionsDehumidified Air Dryer Dehumidified Air Dryer 8.3. Electrical connection Assembly instructions9. Technical Data Technical DataBasic Equipment Optional EquipmentTechnical Data Dimension sheet139O mm 350mm10. Spare parts list Spare parts listSpare parts list Spare parts list Pos. ID-numberDescription10.1. Switching Cabinet and Operating Unit Spare parts listAccessories Return air cooler optional11. Electrical manual Electrical manualDehumidified Air Dryer 12.Accessories AccessoriesDehumidified Air Dryer SM2-625Accessories Entering values on the OP Sterling Material Processing02/01GB 3.3Entering Values ProcedureGeneral Operation Step3.3.1Entering Numerical Values General OperationException 3.3.2Entering Alphanumeric Values ProcedureGeneral Operation StepProcedure General OperationStep 3.3.3Entering Symbolic Values ProcedureGeneral Operation StepAccessories Flap control with Fuzzy-Logic Sterling Material Processing10/00GB Flap control with Fuzzy-Logic Control unit “flap”10/00GB