9.Remove the restriction from the filter element and re-install the clean filter. The alarm light should remain off.

6-6 Dewpoint Control System Service

The Dewpoint Shift feature on dryer models 350 through 2100 depends on the proper operation of the dewpoint sensor and its control board. The dewpoint sensor is in the process airstream and is therefore susceptible to contamination.

Dewpoint sensor life is dependent on:

•Air temperature and flow passing over the sensor.

•The amount of fines [dust] in the process air.

•The amount of plasticizer vapor in the process air.

The dryer operator should monitor the initial dewpoint sensor readings and establish a periodic replacement schedule as needed.

Note: Note: Do not attempt to check the continuity or resistance of a dewpoint sensor. The sensor will be destroyed.

If you suspect that the dewpoint readings on the dewpoint meter are incorrect, a dewpoint simulation calibrator is available from the manufacturer [part number A0549143]. This device simulates various dewpoint outputs. It can confirm proper operation of the dewpoint sensor and dewpoint system control board.

To check the dewpoint sensor and dewpoint control board:

1.Remove the sensor cable from the sensor hex nut adapter.

2.Connect the cable to the plug on the rear of the simulator.

3.Turn the rotary knob on the simulator to each position and note the readings on the dewpoint meter on the dryer's control panel. The readings should correspond within a degree or two across the entire range.

4.If the readings agree, the control board is OK. Dewpoint sensor replacement is recommended. If the readings do not agree, replace the control board and run the test again to rule out the possibility of a bad sensor.

Do not attempt to make any adjustments to the components on the dewpoint control board.

5. When testing is finished, re-connect the control cable to the sensor adapter.

6-7 Symptoms of Worn Out Desiccant

The moisture adsorption capacity of the desiccant used in ACS dryers degrades after an indefinite period of time. Useful life depends on variables such as material moisture content, plasticizer vapors in the return air and number of regeneration cycles.

Your dryer may need new desiccant if it exhibits any of the following symptoms:

•The plastic material is not being dried sufficiently (high scrap/reject rate).

•The air temperature at the top of the regenerating desiccant bed rapidly climbs to 350°F or more shortly after the start of regeneration, even though a saturated bed has just started heating.

•The process air dewpoint, measured with a portable dewpoint monitor, is higher than -10°F throughout the process drying cycle.

•Smoke or dust is being blown out of the process air outlet.

350-2100 cfm Dryers

Chapter 6: Maintenance

38 of 58

Page 37 Page 39
Page 38
Image 38
Sterling 350-2100 CFM Dewpoint Control System Service, To check the dewpoint sensor and dewpoint control board
Page 37 Page 39

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.
Top Page Image Contents