Sterling STT40, STT70 manual Corrective Maintenance, Symptoms of Worn Desiccant

Page 29

STT40 / STT70

5.3. Corrective Maintenance

This section provides you with the information necessary to correct or repair any issues which might appear during the normal operation of your dehumidifying dryer. Although we have listed how to perform these procedures, it is recommended that you call the Service Department to have any in-depth maintenance performed.

5.3.1. Symptoms of Worn Desiccant

The moisture absorption capacity of the desiccant used in your dehumidifying dryer 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 process air dew point measured with a portable dew point monitor is higher than -10°F (-23ºC) throughout the process drying cycle.

•Noticeable amounts of desiccant in the beds is a medium-brown color or darker.

If you notice any of these signs, replace the desiccant in the desiccant beds. Desiccant replacement kits are available from the Parts Department. If you want, a technician can repack desiccant beds at your site.

•Handling desiccant material is HAZARDOUS.

Wear an N-100 type safety filter mask or equivalent to avoid prolonged breathing of desiccant dust. Wear safety goggles and gloves to avoid contact with eyes and skin.

•Handle with adequate ventilation.

•Wash hands thoroughly after handling.

✚ FIRST AID ✚

In case of eye contact, immediately flush eyes with plenty of water for at least 15 minutes.

SEE A PHYSICIAN IMMEDIATELY IF IRRITATION PERSISTS.

Maintenance 5-7

Page 28 Page 30
Image 29
Page 28 Page 30
Contents STT70 Operation Instructions Dehumidified air dryer STT40STT40 / STT70 STT40 / STT70 Table of contents 10-5 General Information STT40 / STT70 Field of application Explanations and informationLegal basis Safety instructions General Operation AssemblyMaintenance For the safety of the device Start up Initial Operation Switching on the DryerPower signal lamp turns off Continuous Operation Switching the Dryer onFor operation with the optional timer clock Setting the Drying Temperature Autotuning the temperature controller Switching the Dryer off Error and error correction Hopper heater Following errors can cause an alarm BlowerRegeneration heater Maintenance STT40 / STT70 System model # Serial # Every week Maintenance scheduleServicing Process Air Filters Preventative MaintenanceRecommendations for Cleaning and Replacing Filters STT40 / STT70 Cleaning or Replacing the Return Air FilterServicing the Dew Point Monitor Symptoms of Worn Desiccant Corrective MaintenanceRemove Hose Clamps Replacing Worn DesiccantRequired Desiccant Amounts Disposing of Drying AgentsReplacing the Process Heater Remove Clamp Process Heater ProceduresCooling Coil Location Replacing/Cleaning the Cooling CoilsHeating Coil Replacing the regeneration heating coilCleaning the Drying Hopper STT 60 STTFunctional description General Information ➅ ➄ Read the timer clock operating manual Drying Hopper Drying Hopper OptionalHopper Heater Temperature controllerContact information Default Settings for Jumo TEMP. ControllerReturn Air Cooler Optional Connection to a Pneumatic Conveying System OptionalTransporting, Assembly and Storage Transporting and Packing Storage AssemblyAssembly instructions Grounding the equipment Grounding the equipment against electrostatic chargingElectrical Connection STT70 Connection of Return Air Cooler OptionalIntroduction TroubleshootingSTT40 / STT70 Check resin manufacturer’s data Using a Platinum Resistance Thermometer Determining Temperature Controller Errors or Sensor ErrorsUsing a Thermocouple STT40 Technical dataSTT70 Return Air Cooler optionalDimension Sheet Spare parts list Pos ID-number Description STT40STT70 Operating unit Pos ID-number Description Control unit STT70 Control unit STT40Electrical manual Accessories Parameter Parameter set Basic temperature controller settings STT40Code Basic temperature controller settings STT70 For STT 40 Dryer Quick Start GuidesPosition O On without timerOn with timer Arrow up Set PointArrow down Process Display LED Status LED Ramp/Program Page Proper Shut-down Guide for STT 40 Dryer Heater Connection Thermocouple Main power High Temp SafetyQuick Start Guide for STT 70 Dryer Exit Page Proper Shut-down Guide for STT 40 Dryer Parts Department

STT40, STT70 specifications

The Sterling STT40 and STT70 are one of the most noteworthy entries in the landscape of compact, high-performance generators, designed to serve a variety of applications in both residential and commercial settings. Built with cutting-edge technology, these models exhibit durability and reliability, ensuring that power needs are met efficiently.

The Sterling STT40 is a robust 40 kW generator that is ideal for small businesses, remote sites, and residential backup power. It features a high-quality diesel engine, providing fuel efficiency along with impressive power output. The generator incorporates a fully automatic transfer switch (ATS), which ensures seamless power transition during outages. With an IP54 rating, it offers excellent protection against dust and water, making it suitable for outdoor use in diverse environments.

In contrast, the Sterling STT70 boasts a greater power output of 70 kW, making it suited for larger commercial applications or industrial uses. Similar to the STT40, the STT70 is equipped with a top-tier diesel engine that delivers optimal performance and longevity. Its heavy-duty construction allows it to operate efficiently under strenuous conditions. The STT70 also features advanced cooling systems and a sound-attenuated enclosure, which minimizes operational noise, making it a perfect choice for noise-sensitive situations.

Both models utilize innovative technologies to enhance user experience and operational efficiency. An intuitive digital control panel simplifies monitoring and management, providing real-time data on voltage, current, and frequency. This allows users to make informed decisions about power usage and maintenance needs. Additionally, remote monitoring capabilities enable owners to oversee generator performance from virtually anywhere, maximizing uptime.

Safety is another key aspect of both generator models. They are equipped with automatic shutdown features that activate in the event of low oil pressure or overheating, minimizing the risk of damage and ensuring safety during operation.

In summary, the Sterling STT40 and STT70 generators stand out in the market due to their reliability, advanced technology, and robust safety features. They are perfect for anyone seeking dependable power solutions, whether for residential, business, or industrial needs. With their combination of power efficiency and durability, they remain top contenders in the generator space.
Top Page Image Contents