Table of Contents
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Fan Control
On-Off 317
Two-Speed 317
Variable Speed 318
Free Cooling 323
Dual Chillers 325
Performance Characteristics 316
Corrective action 5
Critical pressure drop 430
Custom Control Programming 143
Cycle 5
Cycling 5
Cycling rate 5
D
Damper
Actuator and Linkage
Actuator selection 457
Jackshaft 457
Multiple actuators 456
Positive positioner 456
Application Environment
Corrosion 455
Nuclear/Seismic 455
Static Pressure 455
Temperature 455
Turbulence 455
Velocity 454
Applications
Face and bypass Control 464
Mixed Air Control 463
Throttling Control 464
Baffle 451
Construction 452
Mounting alternatives 456
Normally open/normally closed 455
Performance data
Leakage rating 452
Pressure rating 454
Temperature rating 454
Torque requirement 454
UL Classification (fire/Smoke) 454
Velocity rating 454
Pressure drop 462
Sizing
Damper Characteristics 458, 461
Determining Size 459
Other considerations 461
System Characteristics 457
Types
Fire 450
Low Leakage 448
Multiple section 451
Parallel and opposed Blade 448
Round 448
Smoke 450
ENGINEERING MANUAL OF AUTOMATIC CONTROL
Damper Control 105
Damper Selection and Sizing 445
Dampers 76
Data File Programming 143
Data Penetration 195
DDC 6
Deadband 6, 295
Definitions
Chiller, Boiler, And Distribution System Control 295
Dehumidification 12
Dehumidification and Reheat 52
Dehumidification control processes 243
Dehumidifier
Air Washer 51
Density 38
Density Conversion Multipliers 472
Desiccant Drying 67
Design considerations 158
Design procedures
Indoor air quality 161
Ventilation rate 161
Deviation 6, 120
Dew Point Temperature 38
Differential 59
Differential Pressure Sensor Location 357
Digital 6
Digital control 6
Digital Unit Ventilator Control 415
Digital-to-Analog (D/A) Converter 133
Direct Acting 59, 120
Direct Digital Control 133, 134
Direct Digital Control Software 137
Direct Heat Transfer Substations 384
Discharge Air 59
Distributed Power Demand 137
Distribution System
AHU Valve High Differential Pressure Control 352
Flow and Pressure Control Solutions 348
Fundamentals 345
Steam
Supply and Return Main Pressures 373
Valve Selection 348
Water 335
Distribution Systems
Chilled Water 364
Classification of Water 335
Control 335
Hot Water 358
Low Pressure Steam 370
Methods of Controlling 348
Steam 368
Condensate Return 370
Control 366
Variable Vacuum Return 371
Water
Control Requirements 336
487
INDEX
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