HEATING, AIR CONDITIONING, & REFRIGERATION INSTALLER/SERVICER

Anonymous

Alabama (SAA)

Documents

Individual state requirements may vary. Please contact your local apprenticeship office to ensure this version is suitable to your state’s requirements.

Work Process Schedule

Work Process Content

On the Job Training

Anonymous

Skills

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 multimeters to locate faults and troubleshoot low voltage control circuits
Use electrical instruments and multimeters 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

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