Sterling Plumbing Cabinet Series Dehumidifying Dryer, 225, 90, 150 Servicing the Dew Point Monitor

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6-3 Servicing the Dew Point Monitor

The accuracy of the dew point monitor on dehumidifying dryer systems depends on proper operation of the dew point sensor and the control board. The dew point sensor is in the process air stream and is therefore susceptible to contamination.

Dew point sensor life depends 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 dew point sensor readings and establish a periodic replacement schedule as needed.

Caution! Do not attempt to check the continuity or resistance of the dew point sensor. The sensor will be destroyed!

6-4 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 dehumidifying dryer may need new desiccant if it exhibits any of the following symptoms:

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

•Air temperature at the top of the regenerating desiccant bed rapidly climbs to 350°F (177ºC) or more shortly after the start of regeneration, even though a saturated bed has just started heating.

•The process air dew point measured with a portable dew point monitor is higher than -10°F (-23ºC) throughout the process drying cycle.

•Smoke or dust blows out of the process air outlet.

•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 manufacturer’s parts department. If you want, a service technician can repack desiccant beds at your site.

WARNING!

Desiccant material causes eye irritation!

Breathing may be harmful and may cause skin irritation!

•Do not get in eyes.

•Avoid prolonged contact with skin.

•Use with adequate ventilation.

•Wash thoroughly after handling.

Cabinet Series Dehumidifying Dryer

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Contents 90,100, 150, 225 CFM Cabinet Series Dehumidifying Dryers Bulletin No. DH1-630.1 Table of Contents TROUBLESHOOTING…………………………….48 Charts and Figures Safety How to Use This ManualSafety Symbols Used in this Manual Description Responsibility General ResponsibilityOperator Responsibility Maintenance Responsibility Reporting a Safety Defect General Information Closed Loop Drying System Dryer Air Flow DiagramWhat is Desiccant? Process/Regeneration CycleSpecifying a Drying/Conveying System Making Electrical Connections InstallationConnecting Compressed Air Positioning Your DryerConnecting Cooling Water to the Optional Aftercooler Process Air Connections Between the Dryer and Drying HopperDrying Hopper Indicating Lights Control Panel Indicator Lights and SwitchesRocker Switches ControlsSignal to the PLC controller to shut down dryer Typical Dyer Interface Panel Process Air Temperature Controller Identifying Temperature Controller LED IndicatorsProcess Air Dew Point Display Auto-Tune Button Identifying Temperature Controller Buttons Display ButtonDown Arrow Button Up Arrow ButtonAvailable E5CK Modes E5CK Operating ParametersPLC Controller Setting the Process Air TemperatureName Description PLC LED IndicatorsOutput LED Indicators Typical Subpanel Layout Typical Cabinet Dryer Electrical Schematic, Drawing Typical Cabinet Dryer Electrical Schematic, Drawing 222 Setting the Shift on Dew Point Setting the High Dew Point AlarmEntering Operating Parameters to Select Modes Optional Seven Day Timer TimerDisplay Setting the Current Day of the Week, Hour, and Minute Programming the Optional TimerDaily Timer Operation Checking the Set TimeMultiple-Day Operation Day Override Canceling the SettingsCabinet Series Dehumidifying Dryer Shutdown OperationPre-Startup Checks StartupPage Maintenance Work RulesServicing Process Air Filters Washing Recommendations for Cleaning and Replacing FiltersCleaning with Compressed Air VacuumingEvery two years Preventative Maintenance ChecklistSystem model # Serial # Jan Feb Mar Apr May Jun Jul Aug Sep Oct NovServicing the Dew Point Monitor Symptoms of Worn DesiccantFirst Aid Replacing Worn DesiccantReplacing the Process Heater Dryer Large bead Type Small bead Type Total per bedLbs Mode Security level Replacing the Regeneration HeaterChanging the Controller Security Level Mode Parameter Setting range Default Factory Setting Mode Parameter Setting rangeOption Boards Parameter Setting rangeOption Type RE232C RS-485 Event Input Transfer Output Restoring Factory Defaults on the Dew Point ControllerPID Cabinet Series Dehumidifying Dryer Troubleshooting Problem Possible cause Corrective actionStop the dryer PLC Determining Temperature Controller Errors or Sensor Errors Using a ThermocoupleUsing a Platinum Resistance Thermometer Parts Department Technical SpecificationsService Department Contact Information

100, 150, 90, Cabinet Series Dehumidifying Dryer, 225 specifications

The Sterling Plumbing 150, 225, 90 Cabinet Series Dehumidifying Dryer is a state-of-the-art appliance designed to effectively eliminate excess moisture in various environments. This versatile dryer is ideal for residential, commercial, and industrial applications, providing reliable moisture control to enhance air quality and prevent damage due to humidity.

One of the main features of the Sterling Plumbing Dehumidifying Dryer is its impressive moisture removal capacity. With options available for 150, 225, and 90 pint per day configurations, this unit can cater to different sizes and types of spaces, making it a suitable choice for everything from small basements to large warehouses. Its cabinet design allows for efficient air circulation, maximizing its dehumidification capabilities while remaining compact and easy to install.

The technology integrated within the Sterling Plumbing Dehumidifying Dryer is advanced, incorporating a high-efficiency compressor and a durable, corrosion-resistant housing. This ensures that the unit operates quietly and efficiently, providing a long service life with minimal maintenance required. The dryer features an automatic humidistat that monitors the humidity levels in the environment, adjusting its operation to maintain desired settings without manual intervention. This smart technology not only conserves energy but also ensures optimal performance.

In addition to its dehumidification function, the Sterling dryer is equipped with a built-in air filtration system that captures dust and allergens, contributing to overall indoor air quality. The easy-to-clean filters are designed for durability, ensuring that the unit remains functional and effective over time.

Another notable characteristic of the Sterling Plumbing Dehumidifying Dryer is its user-friendly interface. The control panel is designed to be intuitive, allowing users to easily set their preferred humidity levels and adjust operation modes. With options for continuous drainage, users can also opt to run the unit without worrying about emptying the water tank frequently.

Overall, the Sterling Plumbing 150, 225, 90 Cabinet Series Dehumidifying Dryer is a powerful, efficient, and reliable moisture management solution. With its blend of advanced technology, user-friendly features, and robust design, it is an essential appliance for anyone looking to improve indoor air quality and protect their space from the damaging effects of excess moisture.
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