This four-day course is a technical presentation that provides students with an introduction to air handling units, heating equipment, cooling equipment, air supply systems, temperature controls and their heating, ventilating and cooling applications. Topics include:
- Introduction to Air Conditioning
- Control Theory
- Air Handling Units
- Indoor Air Quality
The course is evenly divided between lecture/discussion/demonstration time.
HVAC Fundamentals Course Objectives:
Upon completion of the course, the student should be able to:
- Identify the four important actions involved in air conditioning.
- List the controllable factors for human comfort.
- Identify the parts of an air-conditioning unit.
Introduction to Air Conditioning:
- Define Air Conditioning per ASHRAE.
- Human Comfort and Health
- Industrial Process Environmental Control
- Human body factors that affect body heat
- Effects of Temperature and Relative Humidity
- Define Ventilation
- Air Cleanliness and Filtration
- Define psychrometrics, dry bulb, wet bulb, specific humidity, relative humidity, sensible heat, latent heat, enthalpy, and BTU.
- Use a sling psychrometer.
- Use a psychrometric chart to find dry bulb, wet bulb, relative humidity and specific humidity.
- Identify the three basic blocks of a basic control system.
- Define setpoint, control point, offset, controller throttling range, and system throttling range
- Determine a controller action given an application and the fail-safe position of the controlled device.
- Define components of control loops
- Identify analog signals versus digital signals
- Define differential
- Identify pumps
- Natural Flow versus Forces Flow
- Water distribution systems, a two pipe hydronic system, a three pipe hydronic system, a four pipe hydronic system.
- Identify valves, two-way normally open valves, two-way normally closed valves, three-way mixing valves and three-way diverting valves.
- List the problems of oversized and undersized valves.
- Identify valve end connectors: Flanged, flared, screwed, union screwed, and union sweat
- Identify hydronic systems water treatment.
- Identify the British Thermal Unit (BTU).
- Discuss the Laws of Thermodynamics.
- Identify heat transfer methods, Conduction, Convection and Radiation.
- Identify heat exchange methods.
- Identify the three boiler types.
- Explain fuel combustion and draft.
- Explain the function of steam trap.
- Draw and identify the four main components of a basic refrigeration cycle and identify the direction of refrigerant flow.
- Identify the components on the high and low sides of the mechanical refrigeration cycle.
- Define a ton of refrigeration.
- Explain the purpose of the compressor, condenser, evaporator, and metering device.
- Air-cooled condensers versus water-cooled condensers.
Air Handling Systems:
- Classroom Unit Ventilators.
- Package Air Conditioning units.
- Heat Pump units.
- Air Handling units.
- Rooftop HVAC units.
- Sequences of Operation.
Indoor Air Quality:
- Sick building syndrome.
- ASHRAE standard 62-1989
- Clean Air Act of 1990
- Environmental Protection, CFC and HCFC Refrigerants