HVAC System Control

Order Number: TRG-TRC017-EN
Price: $16

Introduction to automatic HVAC system control of HVAC equipment. (2002)

Topics include:

  • Control loops
  • Types of control action (two position or on/off, floating, proportional, proportional-integral or PI, and proportional-integral-derivative or PID)
  • Pneumatic, analog-electric, and microprocessor-based (DDC) controls
  • Unit-level control versus system-level control
  • Example: unit-level control loops for a VAV air handler
  • Examples of system-level control (occupied versus unoccupied modes, morning warmup mode, changeover in a two-pipe system, water loop temperature control in a WSHP system)
  • Examples of system optimization strategies (fan-pressure optimization, optimum start, chilled-water reset, WSHP loop optimization)
  • Normally-open versus normally-closed actuators
  • Common functions of a building automation system (responding to complaints, graphical user interface, time-of-day scheduling, centralized alarms and diagnostics, remote access, reports, preventive maintenance, integration with other systems, multiple-site support)
  • Network terminology
  • Dedicated vs. shared networks
  • Communication protocols (BACnet, LonTalk)
  • Interoperability