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Large Dehumidifying Dryers v
3-7
Connecting Aftercooler/Precooler Cooling Water (Optional).....................................32
3-8 Using the Drying Hopper Air Trap .............................................................................33
CHAPTER 4: CONTROLS........................................................ 34
4-1 Controller Description................................................................................................ 34
4-2 Identifying Control Panel Components for the AP-1 Optional Controller................... 35
Disconnect Switch ...............................................................................................35
Control Power Switch ..........................................................................................35
Touch Screen ......................................................................................................35
Alarm Horn & Light ..............................................................................................35
4-3 Process Air Temperature and Conveying Process Controller...................................35
4-4 Identifying Controller Screens ...................................................................................36
4-5 Redundant Safety Controller Display ........................................................................49
4-6 Setting the Redundant Safety Controller................................................................... 50
CHAPTER 5: OPERATION....................................................... 52
5-1 Start-up...................................................................................................................... 52
5-2 Using the Dryer Status Screen.................................................................................. 53
5-3 Alarms .......................................................................................................................54
5-4 Alarm Descriptions ....................................................................................................54
5-5 Shutdown ..................................................................................................................55
CHAPTER 6: MAINTENANCE ................................................. 56
6-1 Maintenance Schedule.............................................................................................. 56
6-2 Preventative Maintenance.........................................................................................57
Cleaning or Replacing the Process Air Filters.....................................................57
Cleaning or Replacing the Regeneration Filter....................................................58
Calibrating the Dirty Filter Alarm..........................................................................58
Checking the Dewpoint Control System..............................................................59
6-3 Corrective Maintenance ............................................................................................ 60
Symptoms of Worn Out Desiccant ......................................................................60
Replacing the Desiccant......................................................................................60
Replacing the Process Heater (Electric Dryers)..................................................61
Replacing the Regeneration Heater (Electric Dryers) .........................................62
CHAPTER 7: TROUBLESHOOTING ....................................... 64
7-1 Introduction................................................................................................................ 64
7-2 Basic Troubleshooting............................................................................................... 64
7-3 Determining Temperature Controller Errors or Sensor Errors................................... 66
Using a Thermocouple ........................................................................................66
Using a Platinum Resistance Thermometer........................................................66
CHAPTER 8: APPENDIX.......................................................... 67
8-1 Warranty.................................................................................................................... 67
8-2 Technical Specifications............................................................................................ 68
Annex B Information............................................................................................68
8-3 Spare Parts List......................................................................................................... 69
8-4 Dryer Identification (Serial Number) Tag...................................................................70
8-5 Technical Assistance................................................................................................. 72