ENGINEERING MANUAL OF AUTOMATIC CONTROL
ix
Control System Applications .......................................................................................... 199
Air Handling System Control Applications...................................................................................................... 201
Introduction.......................................................................................... 203
Abbreviations ....................................................................................... 203
Requirements for Effective Control...................................................... 204
Applications-General ........................................................................... 206
Valve and Damper Selection ............................................................... 207
Symbols............................................................................................... 208
Ventilation Control Processes ............................................................. 209
Fixed Quantity of Outdoor Air Control ................................................. 211
Heating Control Processes.................................................................. 223
Preheat Control Processes ................................................................. 228
Humidification Control Process ........................................................... 235
Cooling Control Processes .................................................................. 236
Dehumidification Control Processes ................................................... 243
Heating System Control Process ........................................................ 246
Year-Round System Control Processes .............................................. 248
ASHRAE Psychrometric Charts .......................................................... 261
Building Airflow System Control Applications ............................................................................................... 263
Introduction.......................................................................................... 265
Definitions............................................................................................ 265
Airflow Control Fundamentals ............................................................. 266
Airflow Control Applications................................................................. 280
References .......................................................................................... 290
Chiller, Boiler, and Distribution System Control Applications ....................................................................... 291
Introduction.......................................................................................... 295
Abbreviations ....................................................................................... 295
Definitions............................................................................................ 295
Symbols............................................................................................... 296
Chiller System Control......................................................................... 297
Boiler System Control.......................................................................... 327
Hot and Chilled Water Distribution Systems Control ........................... 335
High Temperature Water Heating System Control............................... 374
District Heating Applications................................................................ 380
Individual Room Control Applications ............................................................................................................ 395
Introduction.......................................................................................... 397
Unitary Equipment Control .................................................................. 408
Hot Water Plant Considerations .......................................................... 424