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Sterling STT70, STT40 manual Please observe the maintenance schedule

Models: STT40 STT70

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)Please observe the maintenance schedule.

STT40 / STT70

)Please observe the maintenance schedule.

Before starting maintenance work, clean the equipment of oil, fuel or lubricant.

Ensure that materials and incidentals as well as spare parts required for operation are disposed of properly and in an environmentally sound manner.

Use only original Sterling spare parts.

Keep records of all maintenance and repair procedures.

Maintenance 5-2

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Sterling STT70, STT40 manual Please observe the maintenance schedule

Contents

Operation Instructions Dehumidified air dryer STT40 STT70Sterling Material Processing Technical service Service department Sterling Material Processing5200 West Clinton Ave Milwaukee, WI TelephoneSTT40 / STT70 Table of contents STT40 / STT70 1. General Information 1.1. Warnings and symbolsCaution High noise pollution 1.2. Explanations and information 1.3. Legal basis1.4. Field of application 1.5. Notes on Usage2. Safety instructions Safety instructionsSTT40 / STT70 2.1 General 2.1.1. Assembly 2.1.2. Operation2.1.3. Maintenance 2.2. For the safety of the device 3. Start up STT40 / STT70Start up 3.1.1. Switching on the Dryer 3.1. Initial OperationThe “power” signal lamp turns off Wait until the blower has stopped3.2.1. Switching the Dryer on For operation with the optional timer clockFor operation without timer clock 3.2. Continuous Operation3.2.2. Setting the Drying Temperature Autotuning the temperature controller If “tunE” stops flashing, Autotuning is finishedPress the “EXIT” key for at least 2 seconds Press the “EXIT” key3.3. Switching the Dryer off The “power” signal lamp turns offWait until the blower has stopped 4. Error and error correction Error and error correctionSTT40 / STT70 The following errors can cause an alarm Blower Regeneration heaterRegeneration heater Hopper heater5. Maintenance Please observe the maintenance schedule 5.1. Maintenance schedule Photocopythis page for your maintenance recordsSystem model # Serial #5.2. Preventative Maintenance 5.2.1. Servicing Process Air FiltersFigure 1 Air Filter Location & Disassembly DO NOT clean/wash filter with waterwhen operating without return air cooler ID when operating with return air cooler ID5.2.3. Servicing the Dew Point Monitor The sensor will be destroyed5.3. Corrective Maintenance 5.3.1. Symptoms of Worn DesiccantFIRST AID Figure 2 Desiccant Bed Location and Disassembly 5.3.2. Replacing Worn DesiccantDESICCANT BEDS ARE HOT DURING OPERATION Remove Hose Clamps Remove Clamp5.4. Disposing of Drying Agents Figure 3 Required Desiccant AmountsFigure 4 Process Heater Location and Disassembly 5.5. Replacing the Process Heater5.5.1.Replacing/Cleaning the Cooling Coils Figure 5 Cooling Coil Location and DisassemblyHazardous electrical current present Figure 6 Heating Coil Location and Disassembly 5.5.2. Replacing the regeneration heating coilHazardous electrical current present Heating Coil5.6. Cleaning the Drying Hopper Figure 7 STT Figure 8 STT 60 - STTSTT 6. Functional description STT40 / STT70Functional description 6.1. General Information The dryer is rated for continuous operationFigure 9 Functional diagram of STT40 / STT70 ➅➄ ➃Read the timer clock operating manual Figure 10 Operating unit6.2. Drying Hopper Optional Figure 11 Drying HopperFigure 12 Temperature controller 6.2.1. Hopper HeaterDEFAULT SETTINGS FOR JUMO TEMP. CONTROLLER PARAMETERS THAT ARE CHANGED IN TESTING AREAPARAMETERS THAT ARE NOT CHANGED FACTORY DEFAULTS Contact information6.4. Return Air Cooler Optional Figure 13 Suction Box7. Transporting, Assembly and Storage Transporting, Assembly and StorageSTT40 / STT70 7.1. Transporting and Packing 7.2. Assembly 7.3. Storage8. Assembly instructions 8.1.Installation of the exhaust fan for regeneration of exhaust 8.3. Electrical Connection STT40 max. 1.1 kW, STT70 max. 2.0 kWThe fuse protection must have STT40 16 A STT70 16 A8.4. Connection of Return Air Cooler Optional 9. Troubleshooting Problem9.1. Introduction Possible causeProblem Process heaters are faultyPossible cause Corrective actionProblem Possible causeCorrective action Using a Thermocouple Using a Platinum Resistance ThermometerProblem Possible cause10. Technical data 10.1. STT4010.2. STT70 Return Air Cooler optional10.3. Dimension Sheet 11. Spare parts list Spare parts listSTT40 / STT70 STT40 ID-numberDescription Return air cooler optionalSTT70 ID-numberDescription Return air cooler optionalOperating unit ID-numberDescription Control unit STT40 Hopper heaterControl unit STT70 Hopper heater12. Electrical manual STT40 / STT70Electrical manual 13. Accessories AccessoriesSTT40 / STT70 Basic temperature controller settings STT40 CodeParameter Parameter setBasic temperature controller settings STT70 CodeParameter Parameter set14. Quick Start Guides 14.1. for STT 40 DryerOn without timer OFF On with timer5.Turn the hopper heater switch to position “I” Position “O” Position “I”Set Point PGM Arrow down Process Display LED “Status” LED Ramp/ProgramEXIT Arrow up Note Due to the following circumstancesPage 14.2.Proper Shut-downGuide for STT 40 Dryer Position “O” Position “I” OFFOn without timer OFF On with timerMain power High Temp Safety 14.3. Quick Start Guide for STT 70 DryerEXIT Position “O” Position “I”Set Point PGM Arrow down Process Display LED “Status” LED Ramp/ProgramNote Due to the following circumstances initial dryer start-up14.4. Proper Shut-downGuide for STT 40 Dryer Position “O” Position “I” OFFService Department Parts DepartmentSales Department Contract Department