Sterling 882.00295.00 specifications Process/Regeneration Cycle, Sequence of Operation

Page 13

moisture is stripped from the air by a desiccant bed. The dried process air is then re-heated and delivered back into the drying hopper to dry material again.

This system is a "closed loop", because ambient (outside) air is never introduced into the process air. The closed loop system is used by the manufacturer because the process air is typically much drier than ambient air, even after carrying moisture out of the plastic resin. Recycling process air maintains drying efficiency at a consistently high level.

The Process/Regeneration Cycle

There are two desiccant beds in a dryer up to 1500 cfm. Larger dryers have four beds (two left and two right beds). While one desiccant bed is on-line in the process air loop, the other is off-line being regenerated (see Figure 1).

When a desiccant bed is on-line, it absorbs moisture from the process air. The desiccant will become saturated with moisture and need to be regenerated. The dryer automatically redirects the process airflow to the second bed and starts regenerating the first bed.

During regeneration, air is heated to approximately 550°F and forced through the saturated desiccant. The moisture driven off the desiccant is bled to the atmosphere. The regeneration heater is then turned off while the regeneration blower continues to blow air through the desiccant bed until it is cooled.

 

Figure 1: Regeneration Cycle

 

 

AD600-AD1500

 

 

AD600-AD1500

 

 

Dryer Flow Schematic

 

 

Dryer Flow Schematic

 

 

Right Desiccant in

Regeneration

Left Desiccant in

Regeneration

Regeneration

Blower

 

Regeneration

 

Blower

 

Dryer Valve

Regeneration

 

Dryer Valve

Regeneration

 

 

Filter

Insulated

Insulated

 

 

Filter

 

 

Drying

 

 

 

 

 

Drying

 

 

Hopper

 

 

 

 

 

 

Hopper

 

 

 

 

 

Regeneration

 

Regeneration

 

Heaters

Process

Heaters

Process

 

Heater

 

Heater

Regeneration

Process

Regeneration

Process

Exhaust

Filter

Exhaust

Filter

Left Desiccant

Right Desiccant

Left Desiccant

Right Desiccant

 

Process

 

Process

 

Blower

 

Blower

Sequence of Operation

When the dryer is started, the main air valve rotates 360º and then moves to place the last successfully regenerated desiccant bed online. If the dryer was powered off using the main power disconnect or E-stopped, then the regenerating bed is placed back into regeneration, and the regeneration cycle is started over. The main air valve is allowed a period of time to move from one position to the other. If the main air valve does not complete positioning within the allotted time, then a “Main Air Valve Fail” alarm is generated and the dryer stops the process air blower and disables the drying hoppers and regeneration circuit.

If the closed loop regeneration option is enabled, the regeneration closed loop valve moves to the open loop position. The system always begins the cooling phase for a regeneration cycle using ambient (open loop) air. The closed loop regeneration valve is allowed a period of time to move from the closed to the open loop position and a “Closed Loop Valve” alarm is generated if the valve fails to reach the commanded position within this time. This alarm will disable the regeneration circuit but does not stop the process air system or drying hoppers.

Large Dehumidifying Dryers

Functional Description

13

Page 12 Page 14
Image 13
Page 12 Page 14
Contents SDA 1000-5100 Series Large Dehumidifying Dryer AP-1 Control Unpacking and Inspection Shipping InfoEvent of Shipping Damage If the Shipment is Not CompleteCredit Returns ReturnsTable of Contents Operation Large Dehumidifying Dryers How to Use This Manual SafetySafety Symbols Used in this Manual Dryer Safety Tags Description General Responsibility ResponsibilityOperator Responsibility Maintenance Responsibility Reporting a Safety Defect Models Covered in This Manual Functional DescriptionGeneral Description Sequence of Operation Process/Regeneration CycleAuto Start Timer Standard FeaturesMechanical Features Electrical FeaturesDewpoint Extend OptionsClosed-Loop Regeneration Drawings and Diagrams Optional dryer dust collector Process Aftercooler Aftercooler Design SpecificationsProcess Air Dust Collector Process Air Dust Collector Material Overdrying Protection Recommended Temperature SettingsElectrical Options Mechanical OptionsController Options Safety Circuit Standards Safety Devices and InterlocksSafety Device Lock-Outs Fail Safe OperationPage Mechanical Options Denotes availability Dimensions and Specifications Denotes availabilityDenotes availability Uncrating the Equipment Mechanical InstallationRigging and Placing Unit Making Electrical ConnectionsDescription Making Gas Line Connections Gas-Fired Models OnlyChecking Blower Rotation Checking for Proper Blower RotationDryer/Drying Hopper Process Air Connections Making Dryer/Drying Hopper Process Air ConnectionsProcess Air Heater on Drying Hopper Large Dehumidifying Dryers Mechanical Installation Aftercooler Components & Flow Rates Connecting Aftercooler/Precooler Cooling Water OptionalDrying Hopper Air Trap Using the Drying Hopper Air TrapController Description ControlsDryer Status Screen Startup Screen Process Air Temperature and Conveying Process ControllerIdentifying Controller Screens Dryer Alarms Help System LOG OFFMain Menu Screen Setting Values Dryer Menu Dryer Status Dryer Setup Over DRY Protect Alarms Auto TuneAuto Start Main Menu Dryer Setup Screen 3 Dryer Setup Screen 2Dryer Setup Screen 4 Overdry Protection Screen 1 Overdry ProtectionOverdry Protection Screen 2 Autotune Alarm History ScreenProcess AutoTune Screen Dew Point Setup Screen DEW Point SetupAutostart Timer Screen Auto StartHelp Menu System Setup SET Clock Hour Meters Alarm History StatusHelp Menu Screen System MenuSystem Setup Screen System Backup Service Menu Main Menu System SetupLOW Level Detection Setup Autostart Clock Screen Clock Menu ScreenInput Status Hour Meter ScreenInput Status Screen Output StatusService System Backup ScreenService Menu Screen Alarm Screens Alarm Screen Example Redundant Safety Controller DisplayAlways put your set point to 30F above set point Setting the Redundant Safety ControllerLarge Dehumidifying Dryers Controls Start-up OperationUsing the Dryer Status Screen Alarm Descriptions AlarmsShutdown Maintenance Schedule MaintenancePhotocopy this page for your maintenance records Cleaning or Replacing the Process Air Filters Preventative MaintenanceCalibrating the Dirty Filter Alarm Cleaning or Replacing the Regeneration FilterChecking the Dewpoint Control System Symptoms of Worn Out Desiccant Corrective MaintenanceReplacing the Desiccant Replacing the Process Heater Electric Dryers Desiccant Tower AssemblyReplacing the Regeneration Heater Electric Dryers Process Heater Box AssemblyRegeneration Heater Box Assembly Basic Troubleshooting TroubleshootingIntroduction Large Dehumidifying Dryers Troubleshooting Using a Thermocouple Determining Temperature Controller Errors or Sensor ErrorsUsing a Platinum Resistance Thermometer Appendix WarrantyAnnex B Information Technical SpecificationsSpare Parts List Level 3 Mechanical Components Located on back of Dryer Dryer Identification Serial Number TagTechnical Assistance Service DepartmentParts Department Sales Department

882.00295.00 specifications

The Sterling 882.00295.00 is a remarkable piece of engineering that seamlessly combines functionality, durability, and aesthetic appeal in a compact form. Designed for those who require reliability and performance, this model stands out in its category, incorporating advanced technologies and user-friendly features.

One of the primary characteristics of the Sterling 882.00295.00 is its robust construction. The casing is made from high-quality materials that ensure resistance to wear and tear, making it suitable for various environments, whether industrial, commercial, or residential. Its sleek design not only provides visual appeal but also enhances its usability, allowing for easy integration into any workspace or setting.

The Sterling 882.00295.00 is equipped with state-of-the-art technology that enhances its performance. It features a precision-engineered mechanism that guarantees accurate readings and efficient operation. Users can rely on its consistent performance, whether for daily tasks or specialized applications. With enhanced data processing capabilities, this device can quickly analyze and display information, making it a valuable tool for professionals.

Another significant aspect of the Sterling 882.00295.00 is its user-centric design. The interface is intuitively organized, providing a seamless experience when navigating its features. This focus on usability ensures that operators of all skill levels can easily understand and utilize the device effectively. Additionally, the model often includes customizable settings, allowing users to tailor its functionality to meet specific needs.

In terms of connectivity, the Sterling 882.00295.00 supports modern protocols, enabling easy integration with other devices and systems. This feature is vital in today's interconnected world, where data sharing and collaboration are essential. Furthermore, it typically incorporates energy-efficient technologies, aligning with sustainable practices and reducing the overall carbon footprint.

Overall, the Sterling 882.00295.00 stands out for its blend of durability, advanced technology, and user-friendly features. It is a versatile solution that meets the demands of various users, from industrial professionals to everyday operators. With its focus on precision and efficiency, the Sterling 882.00295.00 is a valuable addition to any toolkit, ensuring that tasks are completed with the highest level of accuracy and reliability. Whether used in a high-stakes environment or for everyday applications, this model exemplifies the right combination of innovation and practicality.
Top Page Image Contents