Design, Operation Maintenance
 Of HVAC System

The design, operation, maintenance and troubleshooting of a wide range of HVAC systems will be covered. This course starts
with a quick review of psychrometry and representation and air conditioning processes on the psychrometric chart. This is
followed by a detailed discussion of the basic subsystems of any HVAC system, comprehensive coverage of various systems,
and guidelines for selecting the most suitable HVAC system for various applications. Finally, a discussion of the operation and
maintenance of various subsystems and components is presented, followed by an outline of the measurements and instrumentation
 used in HVAC system troubleshooting.

After participating in this course, you will be able to:

• Apply and use psychrometry to understand the design and operation of various HVAC systems
• Recognize and understand the operation of a wide range of HVAC systems
• Select and identify the most suitable HVAC system for various practical applications
• Develop an outline of a complete HVAC system
• Prepare a preventative and regular maintenance program for HVAC systems

Course Outline

● Psychrometry
●  Subsystems for HVAC systems
● Single- and multiple-zone systems
●  Selection of HVAC systems
●  HVAC equipment selection and rating tables
● Air subsystem components
● Air cleaning equipment and air ducts
●  Indoor air quality: operation and maintenance
●  Troubleshooting
●  Workshop

Who should attend?

●  Design and Project Engineers
●  Plant and Facility Managers/Engineers
●  Consultants
●  Mechanical Engineers
●  Maintenance and Operations personnel
●  Technicians and Technologists
●  Contractors
●  Building Inspectors
●  Site Foremen

DAY ONE

Introduction
● The meaning of air conditioning
● Comfort conditions
● Codes and standards
● Rules of thumb (cooling/heating load and ventilation)

Psychrometry
● Moist-air properties
● The Psychrometric chart
● Moist air processes

Basic Subsystems of any HVAC System
● Air subsystem
● Chilled/hot-water subsystem
● Refrigeration subsystem
● Heat-rejection subsystem
● Control subsystem

Types of HVAC Systems – Single-zone systems
● Packaged terminal air conditioner
● Packaged DX rooftop unit
● Split DX system
● Chilled-water terminal system
● Dedicated outdoor-air system
● Water-source heat pump
● Ground-source heat-pump
● Variable-air-volume (VAV) system

DAY TWO

Types of HVAC Systems – Multiple-Zone Systems
● Multizone air handing unit (AHU)
● Changeover-bypass system
● DX rooftop variable-air-volume (VAV) system
● Packaged self-contained VAV system
● Central chilled-water VAV system
● Two-fan, dual-duct VAV system
● Dual-duct VAV system

Selection of HVAC Systems for Various Applications
● Factors that affect selection of HVAC system
● Selection map of HVAC systems for: single-purpose occupancies (e.g., residential, restaurants, shops, clubs, theaters, etc.) and multi-purpose occupancies (e.g., offices, hotels, moles, museums, libraries,
department stores, labs, etc.)

HVAC Equipment Selection and Rating Tables
● Packaged DX units
● Air Handling Units (AHU)
● Air-cooled water chillers
● Water-cooled water chillers

Workshop:• Participants will design an HVAC System for a building under the instructor guidance.

Operation and Maintenance of Air Subsystem Components
Fans
● Functions and types of fans
● Fan selection
● Fan noise – estimated fan sound power level
● Eliminating fan-noise problems
● Periodic inspection
● Fan troubles and the possible causes

Coils
● Types of coils
● Coil accessories
● Condensate control
● Freeze-up protection
● Tightness and cleaning

Air Cleaning Equipment
● Classification of air filters
● Electronic air cleaners
● Activated carbon adsorbers
● Selection of air filters

DAY THREE

Air Ducts
● Air leakage
● Fire protection
● Duct liner and duct cleaning
● Sound attenuation in ducts
● Silencers

Operation and Maintenance to Guarantee Indoor Air Quality (IAQ)
● Inspection, service, and access
● Monitoring of operating conditions in air systems
● Coils and ductwork
● Space pressurization control
● Minimum Ventilation Control
● CO2-based demand-controlled ventilation

Operation and Maintenance of Refrigeration Subsystem Components
● Compressors
● Main problems in direct-expansion reciprocating systems
● Parameters that influence the performance of Shell-and-Tube water–cooled condensers
● Air-cooled condensers: clearance, warm air recirculation, dirt clogging, and low-ambient air control
● Factors that affect cooling tower performance
● Operating considerations for cooling towers
● Maintenance of cooling towers

Troubleshooting of HVAC Systems
● Measurements
● Instrumentation