Sterling 350-2100 CFM User Manual

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350-2100 cfm Dryers 
Chapter 2: Functional Description 
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Chapter 2:  Functional Description 
2-1  Models Covered in This Manual 
This manual provides operation, installation, and maintenance instructions for 
WD/SDA/CDA 350, 425, 500, 600, 700, 850, 1000, 1250, 1500, 1800, and 2100 cfm large 
dehumidifying dryers in both standard 300˚ F and 400˚ F high temperature “-RT” models. 
Model numbers are listed on the serial tag. Make sure you know the model and serial number 
of your equipment before contacting the manufacturer for parts or service. 
2-2 General 
Description 
Dehumidifying Dryers are designed to generate heated, dehumidified air at carefully 
controlled temperatures for use in closed-loop plastic drying systems. Drying systems are 
sized to meet the specific requirements stated by the purchaser at the time of purchase. 
Moisture removal from hygroscopic (moisture attracting) plastic pellets is an essential step in 
the manufacture of high-quality plastic products.  
ACS dryers are used by the plastics industry to generate very low dewpoint air that is heated 
to a controlled temperature for drying plastic pellets and regrind.  
2-3 Typical 
Features and Components 
1.  Branch Fusing provides additional protection to the operator and the components on 
the dryer's sub-panel. 
2.  Dewpoint Monitor indicates dryer efficiency 
2-4 Optional 
Features 
Options can tailor an ACS dryer to meet the exact requirements of the drying task being 
performed.  
•  Dirty filter indicator to advise the operator when it's time to clean the filters. 
•  Water-cooled aftercooler for closed loop regeneration air cooling 
•  SMART PLC to combine PLC features and a "Plain English" interface. This option is 
fully described in its own manual. 
•  Heater Burnout Indicator to monitor the heater(s) amp draw. 
•  Compressed air filter cleaning to lower maintenance on regrind/dusty material drying 
processes. 
•  Auxiliary high temperature safety system to cut high voltage to the blowers and 
heaters in the event of run-away process heaters.  
•  Seven day timer to allow programmable dryer start up. 
•  Communications to meet customer needs. 
•  Drying Hoppers come in many sizes and mounting configurations.  
•  Conveying Equipment to transport material to and from the drying system.  
•  Insulated Process Air Hose to minimize heat loss between the dryer and the drying 
hopper.