Sterling SDF 250 Connection to a Pneumatic Conveying System Optional, Return Air Cooler Optional

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SDF 250/400/500

6.3. Connection to a Pneumatic Conveying System (Optional)

Your drying facility works best in combination with a pneumatic conveying system. In this way, your drying hopper will always be supplied with sufficient material.

The facility will only take as much material as is required by the processing machines. Therefore, the drying result will always be the same.

Sterling drying hoppers are equipped with a suitable flange for adding a Sterling pneumatic conveyor.

Suction boxes with one or three suction tubes

can be supplied as well (optional). TheseA suction boxes are developped specifically for

this type of hopper.

The loading of the conveying line with material is adjusted by closing or by opening of the control cover (A).

Figure 4: Suction Box

6.4. Return Air Cooler (Optional)

FA return air cooler must be employed if the return air temperature is higher than +65 °C (149°F).

A return air cooler improves the efficiency of the drying cells.

&The lower the return air temperature, the better the efficiency of the drying cells.

The return air cooler can be connected to a coolant circuit or to the water mains network.

Functional description 6-18

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Contents Sterling Material Processing SDF 250/400/500 SDF 250/400/500 Table of contents 10-1 General Information SDF 250/400/500 SDF 250/400/500 Legal basis Explanations and informationFields of applications Safety instructions General Operation AssemblyMaintenance For the safety of the devices Start up Touch Screen Control UnitSwitching on the Dryer Entering Dryer Values Basic parametersDew point Act Heater Reg. ActExit air Act Dew point maxEntering hopper values Drying time Target Hopper temp TargetHopper temp Act Granule TempSetting the timer Timer is only operating, when the dryer is switched on Observing processing status Actual hopper temperature displayed in C Status dryerActual operation status Setting date and time Changing language SDF 250/400/500 Continuous operation SDF 250/400/500 Start up Switching the dryer/hopper heater off Error and error correction LED Alarm Actual messages Excess Temperature Return Air Error Bypass FlapError Valve Block Temperature Measurement Outgoing Air DefectiveExcess Temperature Granules Hopper Excess Temperature Heater HopperInsufficient Temperature Heater Hopper Temperature Measurement Granules Defective HopperOverload Regeneration Heater STB has been activated Main switch hopper heater # Controller is offOverload Drying Heater STB has been activated Alarm protocol Maintenance SDF 250/400/500 Maintenance schedule Cleaning or Replacing the Air Filter SDF Dryer Cleaning or Replacing the Return Air FilterCleaning or Replacing the Regeneration air filter Filter of the electrical cabinet Disposing of Drying Agents Cleaning the Drying Hopper STT Remove any granules remaining in the cleaning openingSTT 60 Notch on the battery connector must point to the left Changing the battery of the control systemSDF 250/400/500 Resetting the control values Functional description General Information Dew point dependent regeneration switch optionalHopper heaters optional Drying Hopper OptionalReturn Air Cooler Optional Connection to a Pneumatic Conveying System OptionalTransport, Assembly and Storage Transport with a fork lift truck Tansport and PackingTransport with a workshop crane Storage AssemblyAssembly instructions Connection of Return Air Cooler Optional Electrical Connection Compressed Air Supply Performance Technical dataBasic Version Optional EquipmentSDF 250/400/500 Accessories Accessories Spare parts list Drying Hoppers STT 25 STT STT 25 STT STT 25 STT STT 25 STT STT 25 STT STT 25 STT