Sterling STT70, STT40 manual Replacing Worn Desiccant, Remove Hose Clamps

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STT40 / STT70

5.3.2. Replacing Worn Desiccant

•DESICCANT BEDS ARE HOT DURING OPERATION.

To avoid burn hazard, make sure desiccant beds are sufficiently cool before replacing worn desiccant.

To access the Desiccant Bed:

1.Disconnect electrical power to the dryer.

2.Remove dryer side panels.

3.Remove any internal hoses that may be in the way.

4.Use nut driver to remove clamps at top and bottom of the desiccant tank.

5.Remove the Desiccant Cell leaving valve and Y-pipe attached to the dryer.

6.With a shop vacuum or by dumping, carefully remove all desiccant from each tower.

Figure 2: Desiccant Bed Location and Disassembly

Remove

Hose Clamps

Remove

Clamp

7.Inspect each lower desiccant screen for tears or holes where desiccant burned-through. Replace as needed.

8.After cleaning each chamber, add a level layer of half the 8 x 12 bead desiccant on top of the screen. Next, carefully add the full amount of bead desiccant specified per bed. Smooth the top level, and finally add another layer of the remaining bead desiccant to the top. Make sure this layer is level and smooth. (See following table for correct amount of desiccant required.)

9.Repeat the previous step for the other bed.

10.Inspect the gaskets on the valve assembly. Replace if necessary.

11.Place the desiccant cell assembly back into the dryer and replace clamps.

Maintenance 5-8

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Contents Operation Instructions Dehumidified air dryer STT40 STT70STT40 / STT70 STT40 / STT70 Table of contents 10-5 General Information STT40 / STT70 Explanations and information Legal basisField of application Safety instructions General Assembly OperationMaintenance For the safety of the device Start up Switching on the Dryer Initial OperationPower signal lamp turns off Switching the Dryer on For operation with the optional timer clockContinuous Operation Setting the Drying Temperature Autotuning the temperature controller Switching the Dryer off Error and error correction Following errors can cause an alarm Blower Regeneration heaterHopper heater Maintenance STT40 / STT70 Maintenance schedule System model # Serial # Every weekPreventative Maintenance Recommendations for Cleaning and Replacing FiltersServicing Process Air Filters Cleaning or Replacing the Return Air Filter STT40 / STT70Servicing the Dew Point Monitor Corrective Maintenance Symptoms of Worn DesiccantReplacing Worn Desiccant Remove Hose ClampsDisposing of Drying Agents Required Desiccant AmountsRemove Clamp Process Heater Procedures Replacing the Process HeaterReplacing/Cleaning the Cooling Coils Cooling Coil LocationReplacing the regeneration heating coil Heating CoilCleaning the Drying Hopper STT STT 60Functional description General Information ➅ ➄ Read the timer clock operating manual Drying Hopper Optional Drying HopperTemperature controller Hopper HeaterDefault Settings for Jumo TEMP. Controller Contact informationConnection to a Pneumatic Conveying System Optional Return Air Cooler OptionalTransporting, Assembly and Storage Transporting and Packing Assembly StorageAssembly instructions Grounding the equipment against electrostatic charging Grounding the equipmentElectrical Connection Connection of Return Air Cooler Optional STT70Troubleshooting IntroductionSTT40 / STT70 Check resin manufacturer’s data Determining Temperature Controller Errors or Sensor Errors Using a ThermocoupleUsing a Platinum Resistance Thermometer STT70 Technical dataSTT40 Return Air Cooler optionalDimension Sheet Spare parts list STT40 Pos ID-number DescriptionSTT70 Operating unit Pos ID-number Description Control unit STT40 Control unit STT70Electrical manual Accessories Basic temperature controller settings STT40 CodeParameter Parameter set Basic temperature controller settings STT70 Quick Start Guides For STT 40 DryerOn without timer On with timerPosition O Set Point Arrow down Process Display LED Status LED Ramp/ProgramArrow up Page Proper Shut-down Guide for STT 40 Dryer Main power High Temp Safety Quick Start Guide for STT 70 DryerHeater Connection Thermocouple Exit Page Proper Shut-down Guide for STT 40 Dryer Parts Department

STT40, STT70 specifications

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