5-11 Regeneration Monitoring System Signal Processor

Dryer models 350 through 2100 have a 1/8 DIN signal processor that monitors the bleed air discharged from the desiccant tower being regenerated. The signal processor has four programmable temperature setpoints that, when reached, signal the PLC to cycle through the regeneration process. The PLC interprets the outputs from the signal processor depending on the part of the regeneration process currently underway.

The signal processor's setpoints are factory set for efficient operation in most situations. The manufacturer does not recommend changing the setpoints indiscriminately, but persons knowledgeable of the processing system may fine tune the setpoints for decreased energy consumption.

LL Setpoint - Low Regeneration Alarm Setpoint - 130°F

This setpoint alerts the PLC and operator to possible regeneration heater problems. If this bleed air temperature is not reached within 30 minutes of the regeneration heaters being energized, the Low Regen Air Temp Alarm lights. The light will go out automatically when the setpoint is reached. The alarm can indicate burnt out regeneration heaters, or an extremely moist desiccant bed.

L Setpoint - Regeneration Blower Shutdown Temp - 160°F

After a desiccant tower has been regenerated, the regeneration blower continues to cool the desiccant until this setpoint is reached. The signal processor informs the PLC, and the PLC shuts down the regeneration blower to prevent loading the regenerated bed with ambient moisture.

H Setpoint - Optional Closed Loop Regeneration Cool Down Temp - 250°F

This setpoint output is used on dryers equipped with optional closed loop regeneration cool down. When this setpoint is reached, the output signals the PLC to shift the Wye valve in this device's aftercooler and the cooling water valve to close loop and cool the regeneration air. The very dry regeneration bleed air is directed back into the aftercooler where it is cooled to about 150°, and then back into regeneration blower inlet. This ensures that no moisture will be added to the desiccant bed until it goes back on line.

HH Setpoint - Heater Cut Off Temp - 300°F

This setpoint is the temperature at which the PLC is signaled to shut off the regeneration heaters because the desiccant is dry, and begin the cool down process.

Raising this setpoint will not significantly improve dryer performance, but merely increase energy consumption.

Basic information is listed below. For more detailed information, refer to the processor manual shipped with the dryer.

To change the Regeneration Monitor System Setpoints:

•Press until the LED above the parameter to be changed (LL, L, H, or HH) is lit. The number value displayed is the selected parameter's current set point.

•

•Within 5 seconds, press until the digit to be changed blinks.

•Press until the desired number value is displayed in that digit position.

350-2100 cfm Dryers

Chapter 5: Startup, Shutdown & Operation

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Sterling 350-2100 CFM Regeneration Monitoring System Signal Processor, LL Setpoint Low Regeneration Alarm Setpoint 130F
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350-2100 CFM specifications

The Sterling 350-2100 CFM is a high-performance ventilation system that effectively addresses the needs of various industrial and commercial applications. This versatile unit is designed to provide optimal air movement, offering flow rates spanning from 350 to 2100 cubic feet per minute (CFM). Its capabilities make it ideal for environments that require robust air circulation, such as warehouses, factories, and workshops.

One of the standout features of the Sterling 350-2100 CFM is its energy-efficient motor. The unit is equipped with a reliable and durable drive system, allowing for lower energy consumption while maintaining high performance. This not only reduces operational costs but also contributes to a greener footprint, making it an attractive option for businesses looking to enhance sustainability.

The ventilation system is designed with an advanced aerodynamic blade technology that maximizes airflow and minimizes noise levels. This allows for a more comfortable working environment by reducing the disruption typically associated with high-velocity air movement. Additionally, the integrated sound-dampening features ensure that it operates quietly, making it suitable for noise-sensitive areas.

The Sterling 350-2100 CFM also incorporates a user-friendly control panel, which allows for easy adjustments and monitoring of airflow levels. This system can be tailored to specific ventilation requirements, ensuring optimal performance in diverse settings. For added convenience, some models come with remote control capabilities, allowing operators to manage airflow from a distance.

Durability is a key characteristic of the Sterling 350-2100 CFM. The unit is constructed with high-grade materials that resist wear and tear, providing long-lasting service even in challenging environments. The weather-resistant design further enhances its suitability for outdoor applications.

Moreover, the system can be easily integrated with existing HVAC setups, providing flexibility and compatibility without extensive modifications. Maintenance is also simplified, with easily accessible components for routine checks and servicing.

In summary, the Sterling 350-2100 CFM ventilation system stands out for its combination of energy efficiency, quiet operation, and robust design. With its innovative technologies and user-friendly features, it meets the demands of modern industrial and commercial spaces while ensuring optimal air quality and comfort for occupants.
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