Large Dehumidifying Dryers iv
Table of Contents CHAPTER 1: SAFETY................................................................ 7
1-1 How to Use This Manual............................................................................................. 7
Safety Symbols Used in this Manual.....................................................................7
1-2 Warnings and Precautions.......................................................................................... 8
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