Sterling SDA Series 25-100 Replacing/Cleaning the Cooling Coil, Replacement Procedures

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Replacing/Cleaning the Cooling Coil

5.Disconnect heater thermostat safety.

6.Pickup and place the top casting in a safe place.

7.Pickup the desiccant can to reveal the heater.

8.Using a 1/8” Allen wrench, remove the four (4) 10-32 screws on the heater plate.

9.Remove the wires to the heater plate assembly being removed or replaced.

10.Remove the two (2) 4-40 screws for the temperature switch.

11.Inspect temperature switch with voltmeter. (Normally closed, ohms). Replace if faulty.

12.Re-install the heater and heater plate assemblies in reverse order. Install new heater gaskets and securely tighten all fasteners.

Caution! Heater loops should not touch each other. “Hot spots” lead to premature heater failure!

Replacing/Cleaning the Cooling Coil

Figure 13: Cooling Coil Location and Disassembly

1" Wide x 1/8" Thick High Temperature Gasket

Undo (4) 10-32 Button Head Screws using 1/8 Allen Wrench

Use compressed air or a steam cleaner to blow the dust off or clean any oily residue on the coil.

PROCESS	DEW POINT	CONTROL
TEMPERATURE		POWER
		ON
		OFF

POWER ON

ALARM

ON

OFF

To clean the cooling coil, use compressed air or a steam cleaner to blow the dust off or clean any oily residue on the coil.

Water flow requirement:

If used as an after-Cooler: 3 to 4 GPM @ 85°F.

If used as a Plasticizer trap: 3 to 4 GPM @ 40°F to 45°F.

Replacement Procedures

1.Shut down the dryer, tag out and lock out the controls if necessary.

2.Shut the water off to the cooling coil.

3.Remove the four 10-32 bolts.

4.Gently slide the cooling coil out.

15, 30, & 60 cfm Compact Dryers

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Contents SDA Series 15-60cfm Compact Dehumidifying Dryers If the Shipment is Not Complete Shipping InformationUnpacking and Inspection In the Event of Shipping DamageCHAPTER 2: FUNCTIONAL DESCRIPTION Table of ContentsCHAPTER 3 INSTALLATION CHAPTER 1 SAFETY15, 30, & 60 cfm Compact Dryers CHAPTER 5 MAINTENANCECHAPTER 6 TROUBLESHOOTING CHAPTER 7 APPENDIXSafety Symbols Used in this Manual Chapter 1 Safety1-1How to Use This Manual Dryer Safety Tags 1-2Safety Tag Information1-3Warnings and Precautions Read Operation and Installation ManualOperator Responsibility 1-4ResponsibilityGeneral Responsibility REMEMBER Reporting a Safety Defect Maintenance ResponsibilityWhat is desiccant? Chapter 2 Functional Description2-1Models Covered in This Manual 2-2General DescriptionElectrical Features 2-3Standard FeaturesFigure 1 Typical Dryer Air Flow Schematic Mechanical FeaturesController Features 2-5Safety Devices and Interlocks2-4Options Fail Safe Operation Safety Circuit StandardsSafety Device Lock-Outs 3-2Rigging and Placing the Dryer Chapter 3 Installation3-1Uncrating the Equipment DEW POINT POWER ON15, 30, & 60 cfm Compact Dryers 3-3Electrical Connections Floor Mount Models 3-4Setup ProceduresThree-PhaseModels Checking for Proper Blower RotationOptional Aftercooler 3-5Initial Start-upInstalling Water Lines Drying Hopper Air Trap ConsiderationsShutting Down the Dryer Auto-Tuningthe DryerIndicator Lights Chapter 4 Operation4-1Controller Description and Operation SwitchesPV SV Process Air Temperature ControllerIndicator IndicatorLit when Control Output 1 is on. The Out1 Lit when Control Output 2 is on. Not used inIndicator Setting the Process Air TemperatureIndicator Adjustment LevelEntering Operating Parameters to Select Modes IndicatorName DescriptionOptional Setting the High Dew Point AlarmProcess Air Dew Point Display Controller Operation 4-2Dryer Operation ProceduresAlarm Display Messages PROC BLWR HIGH TEMP VALVE MTRHEAT COOL 50 SYSTEM NORMAL Valve Motor Time-Out Blower Overload No AlarmsEvery week Chapter 5 Maintenance5-1Preventative Maintenance Schedule Every DayVacuuming 5-2Preventative MaintenanceFigure 9 Air Filter Location and Disassembly Servicing Process Air FiltersServicing the Dew Point Monitor 5-3Corrective MaintenanceCleaning with Compressed Air Symptoms of Worn DesiccantReplacing Worn Desiccant + FIRST AID +Figure 11 Required Desiccant Amounts 13X Type Figure 10 Desiccant Bed Location and DisassemblyWARNING! Hazardous electrical current present ProceduresReplacing the Process/Regeneration Heater If used as an after-Cooler 3 to 4 GPM @ 85F Replacing/Cleaning the Cooling CoilFigure 13 Cooling Coil Location and Disassembly Replacement Procedures15, 30, & 60 cfm Compact Dryers 8.Inset the four 10-32bolts back in place9.Turn the water to the cooling coil back on HIGH TEMP Chapter 6 Troubleshooting6-1Introduction Cause PROC BLWRAlarm Message HIGH TEMPCause VALVE MTRUsing a Thermocouple Alarm MessageWarranty Restrictions 7-1WarrantyChapter 7 Appendix Warranty SpecificationsAnnex B Information 7-2Technical SpecificationsCustomer Responsibilities High Pressure Peripheral Blower 7-3Drawings and DiagramsAftercooler Design Specifications Regeneration MoistureMake Up Air ExhaustHigh Pressure Peripheral Blower Figure 16 Low Heat Model 120F to 250F Air FlowAfter-Cooler Regeneration MoistureMake Up Air ExhaustMechanical Components 7-4Spare Parts ListDRYER SPARE PARTS LIST 15, 30, 60 cfm Models 15, 30, & 60 cfm Compact DryersHI-COREDESICCANT DRYER 15/30/60 CFM UNITS 15, 30, & 60 cfm Compact DryersDescription 15, 30, & 60 cfm Compact Dryers30 CFM Description 15, 30, & 60 cfm Compact Dryers60 CFM Description 15, 30, & 60 cfm Compact DryersA0571672 120V CONTROL COMMON PARTSCredit Returns 7-5Returned Material PolicyService Department 7-6Dryer Identification Serial Number Tag7-7Technical Assistance Warranty Returns15, 30, & 60 cfm Compact Dryers Contract Department