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Large Dehumidifying Dryers iv
Table of Contents
CHAPTER 1: SAFETY................................................................ 8
1-1 How to Use This Manual .............................................................................................8
Safety Symbols Used in this Manual.....................................................................8
1-2 Warnings and Precautions ..........................................................................................9
1-3 Responsibility ..............................................................................................................9
General Responsibility...........................................................................................9
Operator Responsibility .........................................................................................9
Maintenance Responsibility.................................................................................10
Reporting a Safety Defect ...................................................................................11
CHAPTER 2: FUNCTIONAL DESCRIPTION........................... 12
2-1 Models Covered in This Manual................................................................................12
2-2 General Description................................................................................................... 12
Specifying a Drying System ................................................................................12
What is Desiccant?..............................................................................................12
The Closed Loop Drying System.........................................................................12
The Process/Regeneration Cycle........................................................................13
Sequence of Operation .......................................................................................14
2-3 Controller Description................................................................................................ 15
2-4 Standard Features..................................................................................................... 16
Mechanical Features ...........................................................................................16
Electrical Features...............................................................................................16
2-5 Options ......................................................................................................................17
Closed-Loop Regeneration .................................................................................17
Process Aftercooler .............................................................................................17
Process Air Dust Collector...................................................................................18
Material Overdrying Protection............................................................................18
Mechanical Options.............................................................................................19
Electrical Options ................................................................................................19
2-6 Safety Devices and Interlocks ...................................................................................20
CHAPTER 3: MECHANICAL INSTALLATION ........................ 22
3-1 Uncrating the Equipment........................................................................................... 22
3-2 Rigging and Placing Unit ...........................................................................................22
3-3 Making Electrical Connections ..................................................................................22
3-4 Checking for Proper Blower Rotation ........................................................................23
3-5 Making Dryer/Drying Hopper Process Air Connections ............................................ 24
3-6 Connecting Aftercooler/Precooler Cooling Water (Optional).....................................25
3-7 Using the Drying Hopper Air Trap .............................................................................26
CHAPTER 4: CONTROLS........................................................ 27
4-1 Controller Description and Operation ........................................................................27
Identifying Control Panel Indicator Lights and Switches for the Standard
Controller.............................................................................................................27
Process Air Temperature Controller....................................................................27