Sterling 350-2100 CFM installation manual Switches and Meters, Valve Position Error

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VALVE POSITION ERROR

A pair of position switches confirm proper shifting of the valves.

If full travel is not confirmed by the switches, the cycle will not begin on the new bed.

4-2 Switches and Meters

ON/OFF SELECTOR SWITCH

This energizes or de-energizes the dryer's control power.

START/STOP PUSH-BUTTON

Press this momentary contact switch to start the dryer. Press this switch to shut down an operating dryer. The dryer shutdown sequence is:

1.Process heaters shut off immediately.

2.Process blower continues to run for 20 minutes to cool the process heater, then shuts off.

3.The regeneration cycle of the off-line bed will continue until finished, the regeneration heaters will shut off, followed by the regeneration blower.

DEWPOINT METER

;This meter indicates the current process air delivery moisture content.

;When the Push To Set button is pressed, the meter indicates the Dewpoint Shift point. See Section 5-10.

PUSH TO SET

This push-button is used when setting or confirming the Dewpoint Shift point. See Section 5- 6.

DEWPOINT SHIFT ADJUST

This potentiometer [pot] is used when setting the Dewpoint Shift point. See Section 5-6.

SHIFT SET SELECTOR SWITCH

In the "ON" position, the drying temperature is raised or lowered to the ¼ DIN controller's alternate temperature - see Section 4-5.

OVER TEMPERATURE RESET [Optional]

This push-button resets the control system to allow restart of heaters and blowers after process air temperature has dropped below the high value programmed into the 1/8 DIN panel meter (4CNTL)

This is on dryers equipped with the auxiliary hi-temperature safety option.

HEATER BURN-OUT INDICATOR METERS [Optional]

;The six current indicating meters monitor the current draw on each phase of the process and regeneration heaters.

;During normal operation, all three meters (phases) should read within one or two amps of each other.

350-2100 cfm Dryers

Chapter 4: Control Panel

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Contents SDA Series 350 2100 CFM Large Dehumidifying DryersWrite Down Your Serial Numbers Here For Future Reference Shipping Info Table of Contents Maintenance How to Use This Manual SafetySafety Symbols Used in this Manual Safety Tag Information Dryer Safety TagsWear Safety Glasses and Work Gloves General Responsibility ResponsibilityOperator Responsibility Maintenance Responsibility RememberReporting a Safety Defect Functional Description Typical Features and ComponentsOptional Features Models Covered in This ManualClosed Loop Drying System What is Desiccant?Process/Regeneration Cycle Cfm Dryers Functional Description TOP View Left Side View Electrical Connections InstallationWork Rules Check For Proper Blower RotationAftercooler Cooling Water Connection Drying Hopper Air Trap Typical Control Panel Control Panel Indicator Lights Control PanelProcess Blower Failure Alarm Switches and Meters Valve Position ErrorProcess Air Temperature Controller PLC ControlProcess Air Temperature Controller Temperature Controller LED Indicators Process Value Numeric LEDTemperature Controller Keys See in Section Optional Communications ProtocolsPre-Startup Checks Startup, Shutdown & OperationStartup To Change the Process Air High Temperature Alarm Setting Setting the Process Air TemperatureSetting the High and Low Temperature Alarms ShutdownTemperature Controller Anti-Tamper Lockout Switch Temperature Controller Autotune ProcedureTemperature Controller Internal Switches Enabling the Lockout FeatureChanging the Display from Fahrenheit to Centigrade Setting the Dewpoint Extend Shift PointTo Change the Dewpoint Shift Point Setpoint Regeneration Blower Shutdown Temp 160F Regeneration Monitoring System Signal ProcessorLL Setpoint Low Regeneration Alarm Setpoint 130F HH Setpoint Heater Cut Off Temp 300FAuxiliary Process Safety System Optional Seven Day Timer OptionalSetting the Current Day of the Week, Hour and Minute Setting the start up timePut the timer into Run mode Setting the stop timeSet the days of the week for automatic operation Filter Cleaning/Replacement MaintenanceServicing the Process Air Filters Models Filter Cleaning/Replacement Servicing the Process Air Filters Models 850 throughTo Clean the Regeneration Filter Dirty Filter Alarm CalibrationServicing the Regeneration Filter Symptoms of Worn Out Desiccant Dewpoint Control System ServiceTo check the dewpoint sensor and dewpoint control board Desiccant Replacement Procedure First AIDProcess Heater Replacement Procedure Desiccant Amounts RequiredRegeneration Heater Replacement Procedure Spots and lead to premature heater failureRestoring a Temperature Controller to the Factory Setup Switch To select a setting 10F Process Temperature Control Error Messages Regeneration Monitor Signal Processor Error Messages Regeneration Monitor Advanced Programming Moving Between LevelsHysteresis SetpointsInput Shift Security Protection Scale Indication Sensor Input TypeDisplay Refresh Cycle Troubleshooting Problem Possible Cause Corrective ActionProblem Possible Cause Corrective Action Problem Possible Cause Corrective Action Returned Material Policy Warranty ReturnsAppendix Credit ReturnsCfm Dryers Appendix Preventive Maintenance Checklist Dehumidifying Dryers Parts Department Service DepartmentTechnical Assistance Sales Department