ENGINEERING MANUAL OF AUTOMATIC CONTROL
DAMPER SELECTION AND SIZING
452
Damper Sizing ............................................................................................................ 463
System Characteristics........................................................................ 463
Damper Characteristics ....................................................................... 464
Inherent Characteristic .................................................................... 464
Installed Characteristic.................................................................... 464
Determining Damper Size ................................................................... 465
Other Damper Sizing Considerations .................................................. 467
Two-Position Control ....................................................................... 467
Modulating Control .......................................................................... 467
Oversized Damper Characteristics...................................................... 467
Damper Performance...................................................................... 467
Control System Sensitivity .............................................................. 467
Damper Pressure Drop ............................................................................................................ 468
Damper Applications ............................................................................................................ 469
Mixed Air Control ................................................................................. 469
Face and Bypass Control .................................................................... 470
Throttling Control ................................................................................. 470
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