Sterling SDAA 25-100 specifications Controller Operation With Optional Alarm Horn & Reset Button

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Controller Operation (With Optional Alarm Horn & Reset Button)

1.Turn the disconnect on the control panel to the ON position. Power is applied to the voltage line fuses, line side of the control power switch and the temperature controller.

2.Turn the control power switch to the ON position. Power is applied to the programmable relay and dew point controller. The valve will move to the start position as follows:

a.The valve motor rotates until the cam switch makes 2 transitions.

b.If the cam switch does not make a transition within 10 seconds, a valve motor fault is generated. “VALVE MTR” is displayed on the relay screen, the alarm horn and light are activated. The valve motor, heaters, and blower shut off. Pressing the ALARM RESET pushbutton will deactivate the alarm horn and light.

Cycle control power to restart the dryer.

Note: The relay screen which contains the Alarm Display Messages is located inside the controller enclosure. For a list of Alarm Display Messages, see Page 35.

WARNING! Do not attempt to check the Alarms on the Controller located within the unit enclosure unless you are a qualified electrician!

c.The valve will normally complete one full cycle (revolution).

If the drying process shuts down due to an alarm, the dryer has been setup to have the following operational features:

•The bed in process at power-down will remain in process.

•The bed in regeneration at power-down will remain in regeneration.

•The regeneration timing cycle will restart from the beginning.

3.Once the control power is on and no fault conditions exist, turning the Off-On-Start switch to the START position will start the dryer as follows:

a.The process heater is turned on and controlled by the E5CN controller.

b.The process/regen blower is started.

c.The regen heater is turned on and the regeneration timing sequence is initiated. The regen heater is controlled by the E5C2 controller. Default timing for regeneration is 35 minutes for HEATING and 30 minutes for

COOLING.

4.If either the left or right bed safety temperature switch opens, a regen heater fault is generated. “HIGH TEMP” is displayed on the relay screen. The alarm horn and light are activated. The process heater, regen heater, and process/regen blower are turned off. Pressing the ALARM RESET pushbutton will deactivate the alarm horn and light.

Turn the Off-On-Start switch to the START position to restart the dryer. If the switch is still open, the dryer will not restart.

Dehumidifying Dryers

Chapter 4: Operation

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Contents Sdaa 25-100 15-60 cfm Dehumidifying Dryers Shipping Information Table of Contents Maintenance Service Department Sales Department Contract Department Safety Symbols Used in this Manual SafetyHow to Use This Manual Wear Safety Glasses and Work Gloves Responsibility General ResponsibilityOperator Responsibility RememberMaintenance Responsibility Reporting a Safety DefectDehumidifying Dryers Safety General Description Functional DescriptionModels Covered in This Manual Mechanical Features Standard FeaturesWhat is desiccant? Electrical FeaturesOptions Safety Devices and InterlocksController Features Fail Safe Operation Safety Circuit StandardsSafety Device Lock-Outs Rigging and Placing the Dryer InstallationUncrating the Equipment Machine-Mount Dryer Dimensions Floor-Mount Dryer Dimensions Suggested Lift Rigging for Cart Mounted Dryers Recommended Dryer Lifting HardwareElectrical Connections Suggested Lift Rigging for Machine Mounted DryersChecking for Proper Blower Rotation Setup ProceduresThree-Phase Models Making Dryer/Drying Hopper Process Air ConnectionsOptional Aftercooler Installing Water Lines Hose and Hose ClampDrying Hopper Air Trap Considerations Pre-Startup Checks Auto-Tuning the DryerInitial Start-up Starting Up the DryerShutting Down the Dryer Operation Start-upController Description and Operation SwitchesIndicator Lights Lit when Control Output 2 is on. Not used Process Air Temperature ControllerLit when Control Output 1 is on. The Out1 Identifying Temperature Controller Keys Indicator Name DescriptionLights in the Operation Indicator Section when Setting the Process Air TemperatureE5CN Operating Parameters Adjustment Level Indicator Name Description Tuned prior to dryer startupEntering Operating Parameters to Select Modes ON, OFFOptional Setting the High Dew Point AlarmProcess Air Dew Point Display Watlow Operating Parameters Redundant Safety Controller DisplaySetting the Redundant Safety Controller Mode Parameter Setting range Default Manf. setting Dryer Operation Procedures Model Heating Cooling 15 cfm 30 cfm 60 cfm Page Controller Operation With Optional Alarm Horn & Reset Button Page Alarm Display Messages Auto-Tuning the Dryer Shutting Down the DryerPhotocopy this page for your maintenance records MaintenancePreventative Maintenance Schedule Servicing Process Air Filters Preventative MaintenanceRecommendations for Cleaning and Replacing Filters VacuumingCleaning with Compressed Air Servicing the Dew Point MonitorCorrective Maintenance Symptoms of Worn DesiccantFirst AID Replacing Worn DesiccantConsult local disposal regulations for more information Procedures Replacing the Process HeaterIntroduction TroubleshootingProblem Possible cause Corrective action Problem Possible cause Corrective action Check resin manufacturer’s data Using a Platinum Resistance Thermometer Determining Temperature Controller Errors or Sensor ErrorsUsing a Thermocouple Warranty Restrictions WarrantyWarranty Specifications AppendixCustomer Responsibilities Warranty LiabilitiesOptional Components Technical Specifications Annex B InformationDrawings and Diagrams Spare Parts List Aftercooler Design SpecificationsLevel 2 & 3 Spare Parts List Electrical & Mechanical Dryer Safety Tags Safety Tag InformationWarranty Returns Returned Material PolicyDryer Identification Serial Number Tag Located on back of DryerParts Department Service DepartmentTechnical Assistance Sales Department
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