Course Description:
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:
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:
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Identify the four important actions involved in air conditioning.
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List the controllable factors for human comfort.
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Identify the parts of an air-conditioning unit.
Introduction to Air Conditioning:
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Define Air Conditioning per ASHRAE.
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Human Comfort and Health
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Industrial Process Environmental Control
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Human body factors that affect body heat
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Effects of Temperature and Relative Humidity
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Define Ventilation
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Air Cleanliness and Filtration
Psychrometrics:
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Define psychrometrics, dry bulb, wet bulb, specific humidity, relative humidity, sensible heat, latent heat, enthalpy, and BTU.
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Use a sling psychrometer.
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Use a psychrometric chart to find dry bulb, wet bulb, relative humidity and specific humidity.
Control Theory:
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Identify the three basic blocks of a basic control system.
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Define setpoint, control point, offset, controller throttling range, and system throttling range
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Determine a controller action given an application and the fail-safe position of the controlled device.
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Define components of control loops
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Identify analog signals versus digital signals
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Define differential
Hydronics:
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Identify pumps
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Natural Flow versus Forces Flow
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Water distribution systems, a two pipe hydronic system, a three pipe hydronic system, a four pipe hydronic system.
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Identify valves, two-way normally open valves, two-way normally closed valves, three-way mixing valves and three-way diverting valves.
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List the problems of oversized and undersized valves.
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Identify valve end connectors: Flanged, flared, screwed, union screwed, and union sweat
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Identify hydronic systems water treatment.
Heating:
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Identify the British Thermal Unit (BTU).
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Discuss the Laws of Thermodynamics.
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Identify heat transfer methods, Conduction, Convection and Radiation.
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Identify heat exchange methods.
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Identify the three boiler types.
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Explain fuel combustion and draft.
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Explain the function of steam trap.
Cooling:
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Draw and identify the four main components of a basic refrigeration cycle and identify the direction of refrigerant flow.
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Identify the components on the high and low sides of the mechanical refrigeration cycle.
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Define a ton of refrigeration.
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Explain the purpose of the compressor, condenser, evaporator, and metering device.
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Air-cooled condensers versus water-cooled condensers.
Air Handling Systems:
Indoor Air Quality: