Dehumidifier User Manual

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
...................................................................35
4-4 Identifying Controller Screens ...................................................................................36
Main Menu Screen...............................................................................................................36
Typical Dryer Screens..........................................................................................................36
System Screens ..................................................................................................43
Alarm Screens.....................................................................................................48
Alarm Screen Example........................................................................................49
See Section 7-4: Alarms on p. 57 for alarm descriptions.............................................................49
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
................................................................................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