Course Content
Part 1: Beginners Level
The beginner level of the HVAC Engineer/Technician course introduces foundational concepts essential for understanding HVAC systems. It covers the basics of thermodynamics, HVAC components, and refrigeration cycles, with a focus on the role of temperature, airflow, and pressure in system operation. Students will learn about critical components like thermostats, evaporator coils, condensers, and blowers, as well as basic electrical principles and safety protocols.
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Module 1: Introduction to HVAC Systems
Module 2: Basic Thermodynamics for HVAC
Module 3: HVAC Components and Equipmen
Module 4: Refrigeration Cycles and Basic Principles
Module 5: Introduction to Airflow, Heat Transfer, and Pressure
Module 6: Basic Electrical Concepts for HVAC
Module 7: Safety Protocols and Industry Standards
Beginner Level Quiz
Part 2: Intermediate
The intermediate level of the HVAC Engineer/Technician course delves deeper into the operation and optimization of HVAC systems. It covers advanced refrigeration systems, focusing on variable refrigerant flow (VRF) and non-VRF systems, alongside sustainable refrigerants and their environmental impacts. The course also explores HVAC system installation, commissioning procedures, and the importance of system performance testing, air and water balancing, and control system calibration. Additionally, students learn about troubleshooting techniques and maintenance practices to ensure system longevity and efficiency. Key concepts include energy efficiency measures, advanced diagnostics, and retro-commissioning strategies for improving existing HVAC systems. This level prepares students to handle more complex HVAC system configurations and refine their technical skills.
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Module 1: Advanced Refrigeration Systems
Module 2: HVAC System Installation and Commissioning
Module 3: Troubleshooting and Maintenance Techniques
Module 4: Ductwork and Piping Systems
Module 5: Control Systems and Sensors
Module 6: Energy Efficiency in HVAC Systems
Module 7: Basic Electrical Troubleshooting
Part 2: Intermediate Test
Level 3: Expert
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Module 1: Advanced HVAC Control Systems and Automation
Module 2: Energy Audits and Optimization
Module 3: Indoor Air Quality (IAQ) and Environmental Controls
Module 4: Integrated System Design for Complex Installations
Module 5: HVAC Industry Codes and Regulations
Level 3 Quiz
Beginner To Expert HVAC Engineer/Technician

Module: Core HVAC Components

Overview

HVAC systems are complex networks of components designed to regulate temperature, humidity, and air quality. Each component plays a crucial role in ensuring the system operates efficiently and effectively. This module explores the key components of HVAC systems, from compressors to ducts, providing a deeper understanding of their functions, interconnections, and importance in system operation and troubleshooting.

Core HVAC Components

  1. Compressor

    • Function: The compressor is responsible for circulating refrigerant throughout the HVAC system. It compresses the refrigerant gas, increasing both its pressure and temperature, which enables the refrigerant to absorb and release heat effectively.

    • Importance: The compressor is vital for the entire refrigeration cycle, as it drives the refrigerant through the system.

  2. Evaporator Coil

    • Function: Located inside the system, the evaporator coil absorbs heat from the indoor air, causing the refrigerant to evaporate. This process cools the air, which is then circulated back into the room.

    • Importance: The evaporator coil is crucial for the cooling process, ensuring that the indoor space remains at a comfortable temperature.

  3. Condenser Coil

    • Function: After absorbing heat, the refrigerant is compressed and sent to the condenser coil. The condenser coil releases the absorbed heat to the outside air, cooling the refrigerant and allowing it to condense back into a liquid state.

    • Importance: The condenser coil plays a key role in heat dissipation, ensuring the refrigerant can return to the system for further cooling cycles.

  4. Expansion Valve

    • Function: This component regulates the flow of refrigerant into the evaporator coil, lowering the pressure of the liquid refrigerant, allowing it to expand and cool before entering the evaporator.

    • Importance: The expansion valve ensures that the refrigerant enters the evaporator coil at the correct pressure and temperature for optimal heat absorption.

  5. Blower Fan

    • Function: The blower fan circulates air through the HVAC system, distributing the conditioned air evenly throughout the building’s ductwork.

    • Importance: Proper airflow is essential for system efficiency and comfort, and the blower fan ensures that the air reaches all areas of the building.

  6. Air Handler

    • Function: The air handler works with the blower fan to distribute conditioned air throughout the building. It houses other key components, including the evaporator coil and filters.

    • Importance: The air handler is integral in ensuring the air is conditioned and distributed correctly across the space.

  7. Ductwork

    • Function: Ducts are conduits that transport air to and from various rooms or areas within the building. Proper duct design and installation are essential for maintaining system efficiency.

    • Importance: Well-maintained ductwork ensures proper airflow, temperature regulation, and energy efficiency.

  8. Thermostat

    • Function: The thermostat acts as the control unit for the HVAC system. It detects room temperature and adjusts the system’s operation to maintain the desired environmental conditions.

    • Importance: The thermostat is the primary interface for users to control and regulate indoor temperatures, directly influencing energy usage and comfort.

Additional HVAC Components for Commercial Buildings

1. Chillers

  • Function: Chillers are the core of a chilled water system, responsible for generating chilled water, typically between 44-46°F (6.7-7.8°C). This chilled water is then used by air handling units (AHUs) and rooftop units (RTUs) to cool the air within the building.

  • Types: Chillers can be air-cooled or water-cooled. Water-cooled chillers require a cooling tower to reject heat, while air-cooled chillers are more suitable for rooftop or outdoor installations.

  • Location: Water-cooled chillers are typically located in basements or lower floors, whereas air-cooled chillers can be placed on rooftops or other outdoor areas.

2. Air Handling Units (AHUs)

  • Function: AHUs are responsible for distributing conditioned air throughout the building. They typically include a fan, filters, and heating/cooling coils.

  • Role in Chilled Water Systems: AHUs receive chilled water from the chiller system and use it to cool the air before it is circulated through the ductwork.

  • Location: AHUs are generally located indoors and connected to a central chiller system via piping for chilled water.

3. Rooftop Units (RTUs)

  • Function: RTUs are self-contained HVAC units that provide both heating and cooling. They are typically installed on the roof of a building.

  • Key Difference from AHUs: Unlike AHUs, RTUs are not connected to a central chiller system. They contain their own integrated cooling and heating systems.

  • Use Cases: RTUs are commonly used in smaller commercial buildings, single-story structures, and retail spaces due to their compact, self-contained design.

Summary of HVAC Component Roles

  • Chillers: Produce chilled water used for cooling air in AHUs or RTUs.

  • Air Handling Units (AHUs): Distribute cooled air throughout the building via ducts, utilizing chilled water from the chiller.

  • Rooftop Units (RTUs): Provide a self-contained solution for heating and cooling, ideal for smaller buildings or those without a central chiller system.

Educational Resources

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