Sterling 882.00290.00 Chapter 4: Operation

Chapter 4: Operation

4-1 Start-up

1. Turn on (energize) the disconnect switch in your power drop, and then turn on the one on the

dryer.

2. Turn the system ON/OFF switch to ON to energize the display panel.

3. Close the slide gate at the bottom of the drying hopper.

Make sure that the blowers turn in the right direction.

4. Fill the drying hopper with material.

5. Turn the dryer ON switch to START to start the dryer.

The process blower starts.

6. If your dryer has a water-cooled aftercooler, make sure that sufficient cooling water (3gpm at

85°F or lower) flows properly through the coil and that you have bled any trapped air from the

system. Make sure the aftercooler has the proper supply water temperature.

7. Set the process set point on the temperature controller.

8. After the proper pre-drying time for the initial hopper fill has elapsed, fully open the drying

hopper slide gate.

9. Turn on the machine convey ON/OFF switch to ON, and set the convey timer for the proper

conveying time.

Note: To allow proper residence time during continuous processing,

maintain the material level in the hopper at the midpoint of the air trap

assembly.

4-2 Controller Description and Operation

Identifying Control Panel Indicator Lights and Switches for the Standard

Controller

Switches

System OFF/ON/START Switch. This switch energizes or de-energizes control power to

the indicator panel and starts the dryer. (The controller can be energized without the dryer

running.)

Optional Alarm Silence Switch. Press this switch to silence the horn when a high

temperature process/regeneration or blower failure alarm activates.

Indicator Lights

Alarm Light. This feature works in conjunction with the alarm horn to warn the operator of

a high bed safety temperature, a regeneration heater fault, or a blower failure. This warning

is reset by pressing the alarm silence button.

Figure 4: Typical Dryer Control Panel (shown with the optional dew point monitor).

Dehumidifying Dryers Chapter 4: Operation 19 of 53

Contents

Main 15, 30, and 60 CFM Dryers With AP-0 Controls Shipping Information Table of Contents CHAPTER 1: SAFETY................................................................ 5 CHAPTER 2: FUNCTIONAL DESCRIPTION........................... 10 CHAPTER 3: INSTALLATION..................................................14 CHAPTER 4: OPERATION.......................................................19 CHAPTER 5: MAINTENANCE ................................................. 35 CHAPTER 6: TROUBLESHOOTING ....................................... 42 CHAPTER 7: APPENDIX..........................................................45 Chapter 1: Safety 1-1 How to Use This Manual DANGER! 1-2 Safety Tag Information 1-3 Warnings and Precautions 1-4 Responsibility Page Page Chapter 2: Functional Description 2-1 Models Covered in This Manual 2-2 General Description 2-3 Standard Features 2-4 Options 2-5 Safety Devices and Interlocks Page Chapter 3: Installation 3-1 Uncrating the Equipment Note: 3-2 Rigging and Placing the Dryer Note: USE FORK LIFT TRUCK USE Overhead Crane 3-3 Electrical Connections 3-4 Setup Procedures Checking for Proper Blower Rotation Drying Hopper Air Trap Considerations (If Equipped) Installing the Optional Aftercooler 3-5 Initial Start-up Pre-Startup Checks Chapter 4: Operation 4-1 Start-up The process blower starts. 4-2 Controller Description and Operation Page 8.8.8.8 8.8.8.8 Identifying Temperature Controller Keys Setting the Process Air Temperature Restoring the Process Air Temperature Controller (E5CN) Adjustment Level Note: Entering Operating Parameters to Select Modes The SV readout displays the different values for the parameter within a mode. The PV readout will display the different parameters within each mode. The SV readout displays the different values for the parameter within a mode. Figure 6: Settings for Process Temperature Controller (E5CN), Part No. A0567917 Process Air Dew Point Display Figure 7: Typical Dew Point Display Monitor; Part Number A0555757 AT Note: Setting the High Dew Point Alarm Restoring the Process Air Dew Point Meter (E5CK) to Factory Setup Redundant Safety Controller Display Optional Figure 8: Typical Redundant Safety Controller Display; Part No. A0568961 WATLOW Operating Parameters Entering Operating Parameters to Select Modes Figure 9: Setting List for Redundant Safety Controller (WATLOW), Part No. A0568961 4-3 System Operation Procedures Controller Operation (Without Optional Alarm Horn & Reset Button) Note: Page OMRON E5C2 Note: Alarm Display Messages 4-4 Auto-Tuning the Dryer HIGH TEMP PROC BLWR VALVE MTR Page Chapter 5: Maintenance 5-1 Preventative Maintenance Schedule replacement date inspection System model # 5-2 Preventative Maintenance Servicing Process Air Filters Recommendations for Cleaning and Replacing Filters Figure 10: Air Filter Location and Disassembly Vacuuming Cleaning with Compressed Air Servicing the Dew Point Monitor 5-3 Corrective Maintenance Symptoms of Worn Desiccant + 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. Replacing Worn Desiccant Figure 11: Desiccant Bed Location and Disassembly Page Figure 13: Process Heater Location and Disassembly Procedures Replacing/Cleaning the Cooling Coils Figure 14: Cooling Coil Location and Disassembly 6 Troubleshooting 6-1 Introduction HIGH TEMP PROC BLWR Dehumidifying Dryers 6Troubleshooting 43 of 53 VALVE MTR 6-2 Determining Temperature Controller Errors or Sensor Errors Using a Thermocouple 7 Appendix 7-1 Warranty Warranty Liabilities Customer Responsibilities 7-2 Technical Specifications Annex B Information Aftercooler Design Specifications Entering water temp. F C 85F 50F (If used as Plasticizer trap) 29C 7-3 Drawings and Diagrams Figure 15: Standard Model (180F to 250F) Air Flow Schematic Figure 16: High Heat Model (180F to 400F) Air Flow Schematic Figure 17: Low Heat Model (120F to 250F) Air Flow Schematic 7-4 Spare Parts List Figure 18: Level 1 Spare Parts List (Electrical & Mechanical) Dehumidifying Dryers 7Appendix 50 of 53 Page 7-5 Returned Material Policy Credit Returns 7-6 Dryer Identification (Serial Number) Tag 7-7 Technical Assistance Parts Department Service Department Sales Department Contract Department