HVAC
Competency-based
ONET: 49-9021.01
1
Years
91
Skills
1093h
Related instructions
Classroom instruction topics
- Student Success
- Refrigeration Principles
- HVAC Service Procedures
- Refrigeration Piping Practices
- Fundamentals of Gas Heating Systems
- Principles of Electricity for HVACR
- HVAC Electrical Components
- Commercial Heating Systems
- Residential Air Conditioning
- Refrigeration Transition and Recovery
- Heat Pump Systems I
- Special Topics in AC and Refrigeration I
- CO-OP
- Commercial Refrigeration
- System Sizing and Air Distribution
- Commercial Air Conditioning Systems
- English Composition I or Technical Report Writing
- Humanities and Fine Arts Elective
- Natural Sciences and Mathematics Elective
- History, Social and Behavioral Science Elective
On-the-job training
- Safety Training PPE ‐ (LOTO, Ladder Safety, Fall Protection, etc.)
- Demonstrate safe handling of refrigerants
- Demonstrate safe handling of pressurized gasses
- Demonstrate safe handling of combustibles
- Appropriately use SDS (Safety Data Sheet) information
- Work in a safe and workman-like manner abiding applicable local, state, and federal regulations; EPA (environmental), DOT (motor vehicles) and OSHA (worker safety)
- Demonstrate lockout & tag out procedures
- Demonstrate safe ladder usage
- Demonstrate torch safety
- Demonstrate use of personal fall protection equipment
- Trade Mathematics
- Calculate the volume and area of basic geometric shapes
- Calculate fan speed (RPM) required to produce a specified change in volume (CFM)
- Use Ohm's Laws and solve for various calculations
- Electrical Power
- Diagnose and repair motor starter circuits and various types of electrical motors
- Troubleshoot and repair overcurrent protection and circuit breakers
- Troubleshoot types of circuits-series, parallel, and series-parallel
- Use electrical instruments and multi-meters to locate faults and troubleshoot low voltage control circuits
- Use electrical instruments and multi- meters to locate faults and troubleshoot high/line voltage power circuits
- Read wiring schematics, pictorial diagrams, and ladder diagrams
- Identify wiring symbols
- Heating Systems
- Troubleshoot gas heating pilot systems and flame verification
- Identify gas heating components and demonstrate ability to troubleshoot common failures
- Identify and install proper gas vent sizing, proper draft verification, and solve combustion related issues
- Identify boiler components, safeties, and knowledge of basic system operation
- Cooling Systems
- Describe temperature pressure relationships
- Evaluate cooling systems and determine specific deficiencies and corrective actions required
- Identify and evaluate various types of compressors and their performance
- Inspect cooling system for primary controls, safeties, refrigerant control valves, and regulators
- Air Distribution Systems
- Design a duct system using the relationship between pressure, velocity, and volume in distribution systems
- Use a duct calculator and solve for airflow related variables and duct sizing/flow calculations
- Appropriately use air measurement instruments
- Identify and install duct system components, fittings and support systems
- Use energy efficient insulation methods and sealing techniques for duct systems
- Copper, Plastic, and Steel Piping
- Install and support soldered/brazed joints and mechanical/flared connections of various types of copper pipe/tubing
- Design and install steel piping in residential and commercial applications using fitting geometry including allowances, methods of joining and threading, installation of hangers and other support means
- Install various types of pipe insulation materials
- Electrical Motors and Compressors
- Perform diagnostics on various types of single and three phase motors and wiring methods including multispeed, start relays and start/run capacitors
- Identify and describe various methods of compressor capacity control
- Identify and describe compressor failures due to electrical, mechanical, hydraulic, and lubrication issues
- Identify and explain the operation of compressor protection devices
- Use pressure-temperature charts to calculate system superheat and sub cooling
- Select appropriate refrigerant for compatible oil used in various temperature range applications
- Identify sources of oil contamination
- Use common refrigerant retrofit processes including system cleanup and lubricant changes
- Leak Detection, Evacuation, Recovery and Charging Processes
- Check refrigerant circuits for leaks using equipment and procedures
- Demonstrate system evacuation procedures including recovery, recycle, and reclamation of refrigerants
- Use proper charging techniques with various types of zeotropic and zeotropic refrigerants
- Metering Devices
- Identify service issues with various metering devices and troubleshoot and repair/replace the devices
- Heat Pumps
- Explain the operation of various types of heat pump systems
- Troubleshoot and repair components, controls, and supplemental heat systems
- Troubleshoot common service issues and repairs as well as installation methods
- Troubleshoot and replace a four-way valve/reversing valve in a heat pump system
- Equipment Maintenance
- Identify common seals, bearings, gaskets and packing materials
- Properly use common lubricants
- Identify belt drive components and replace, align, and adjust tension these components
- Inspect and maintain common packaged and split HVACR systems
- Sheet Metal Duct Systems
- Identify and install common types of sheet metal ducts using joining, support and reinforcement methods
- Internally and externally insulate and attenuate metal ducts
- Identify and install sheet metal dampers, access doors and other accessories
- Install flexible duct connectors and systems
- Use a velometer to determine system airflow
- Test the properties of air and psychometrics as related to human comfort and maintaining conditioned spaces
- Use tools and instruments to test air balance in HVAC systems
- Commercial Airside Equipment
- Describe commercial airside, ventilation, and exhaust systems
- Demonstrate the knowledge of constant volume, variable volume and variable volume/temperature (VVT) systems and their applications
- Operate various air terminal and delivery equipment
- Identify the key components, the operation, and common service issues pertaining to packaged and split air handling equipment, economizers, air filtration and other common accessories
- Motor and Control Circuit Troubleshooting
- Troubleshoot and service electronically commutated motors (ECM)
- Start and setup variable frequency drives as well as resolve common issues
- Troubleshoot common control circuits and load components
- Operate, install, and troubleshot temperature controls and various types of thermostats
- Use wiring diagrams necessary to troubleshoot control system failures
- Cooling Systems Troubleshooting
- Recognize and remedy specific system faults and failures common to packaged/split cooling and heat pump systems with understanding of refrigerant cycle
- Heat Pump Systems Troubleshooting
- Explain the sequence of operation of common heat pump systems in the heating, cooling, and defrost modes
- Explain the operation of supplemental heat and dual fuel systems in relationship to heat pump systems
- Diagnose and troubleshoot heat pump systems, controls, and components
- Gas Heating Systems Troubleshooting
- Explain the sequence of operation of common gas heating systems and common system/component failures
- Diagnose and troubleshoot gas heating systems, controls, flame and pilot verification systems, and components
- Diagnose and correct operational issues of natural draft, power draft, and induced draft equipment types
- Identify and install appropriate vent types for condensing and non-condensing equipment
- Air Handler and Furnace Accessories Troubleshooting
- Explain the sequence of operation of common airside accessories- humidifiers, electronic air cleaners, economizers, UV lighting systems, and heat recovery ventilators/systems
- Identify faults and repair of common accessories
- Zoning, Ductless and Variable Refrigerant Flow (VRF) Systems
- Operate and adjust common zoning, damper & Variable Actuator Vein/Variable Valve Timing Actuator (VAV/VVT) systems and identify common system/component failures
- Troubleshoot, service, and install ductless and Variable Refrigerant Flow (VRF) systems
- Indoor Air Quality (IAQ)
- Determine IAQ issues and effects on occupants
- Resolve IAQ issues by explaining how acceptable IAQ can be achieved
- Identify IAQ based HVAC equipment and explain their use to maintain acceptable IAQ
- Construction Drawings
- Accurately read blueprints and specifications including symbols, schedules, details and proficiency locate specific information
- Commercial and Industrial Refrigeration Systems
- Describe the methods used to freeze and store food products
- Describe the sequence of operation of various commercial and industrial refrigeration systems
- Identify and describe the function of various system components and controls
- Identify the common defrost systems, components, and sequences of operation
Certifications
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