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Heating & Air Conditioning Mechanic & Installer
Published
Time-Based Apprenticeship
Industries
O*Net Code
49-9021.00
Rapids Code
0637R1
Req. Hours
7800
State
DC
Created
Jul 16, 2021
Updated
Jul 16, 2021
Time-Based Skills
6 skill sets | 61 total skills
General Trade Orientation - 400 req. hrs
Safety procedures and first aid
Customer interaction Soft Skills
Use and care of tools
Test and measurement devices
Use of grinders, drill presses, lathes
Tool and drill sharpening
Types and sizes of piping, tubing, and fittings
Introduction to refrigeration system components
Equipment records and reports
Fabrication of System Components - 500 req. hrs
Cut, thread, flare, bend, and shape piping and tubing
Mechanical fittings groove piping systems and mechanical press locking systems
Install fittings
Solder, braze, and tin fittings and components
Care and use of oxy-acetylene and air-acetylene torches
Silver and soft soldering
System Installation and Connection - 600 req. hrs
Electrical supply lines and cables
Electrical connections
Water service lines
Air supply lines
Steam lines
Steam return lines
Steam traps and strainers
Pressure reduction, expansion, evaporator, stop valves
Suction and discharge lines
Gauges
Dehydrators
Filters and strainers
Controls
Non vital component selection
Equipment Installation - 950 req. hrs
Install commercial equipment: Package units, curbing, duct adapters
Install commercial equipment: Boilers
Install commercial equipment: Chillers
Install commercial equipment: Air Handlers
Install commercial equipment: Ventilation units
Install commercial equipment: Exhaust fans
Install commercial equipment:
Install commercial equipment: Other
Prepare compressor and motor bases
Install and align compressors and motors
Install evaporators and other cooling coils
Install and align centrifugal pumps and bases
Safe equipment moving and rigging- slings, lines, blocks and falls, chain hoists, rollers, dollies, and skids
System Maintenance - 3350 req. hrs
Troubleshoot field systems: Heat pumps
Troubleshoot field systems: Fuel burning equipment
Troubleshoot field systems: Motors/ compressors
Troubleshoot field systems: Air conditioning systems
Troubleshoot field systems: Refrigeration
Troubleshoot field systems: Chiller systems
Troubleshoot field systems: Duct systems
Troubleshoot field systems: Building environment, indoor air quality, building systems
Troubleshoot field systems: Internet of things testing operation.
Test pressure, flow, etc.
Check liquid levels
Check repair leaks (refrigerants, liquids)
Purge, dehydrate, and charge systems
Repair, align, and adjust fans and blower sections
Align pulleys, bearing blocks, belt tension
Equipment Repair - 2000 req. hrs
Disassemble and clean, repair, perform shop tests and run-in compressors
Repair, pressure test, dehydrate evaporators
Repair, acidize condensers, and roll condenser tubes
Remove, replace, disassemble, test, clean, calibrate, and renew defective parts on controls of all types including: pneumatic, electrical, electro-pneumatic, thermostatic, humidity, pressure, vacuum
Technical Instruction
Introduction to HVAC - 20 req. hrs
Chapter Introduction
History of Refrigeration and Air-Conditioning (Cooling)
Green Awareness
History of Home and Commercial Heating
Career Opportunities
Technician Certification Programs
Programmatic Accreditation
National Skill Standards
Customer Relations and Technician Soft Skills
First Impressions
Appearance
Communication Skills
Conflicts and Arguments
The Service Call
The Technician as a Salesperson
Basic Entry Level Prerequisites - 20 req. hrs
OSHA 10-hour certification
Arc Flash Training
Heat, Matter and Energy - 20 req. hrs
Safety-related issues
Temperature
Heat content and the British Thermal Unit
Heat transfer by conduction, convection, and radiation
Latent and sensible heat transfers
Temperature conversions
Pressure: absolute and gauge
Gas laws
Mass, weight and density
Power and energy
Introduction to residential energy auditing
Introduction to heat gain and heat loss calculations
Basic Refrigeration - 20 req. hrs
Safety-related issues
The refrigeration processes
System compressors
System condensers
System metering (expansion) devices
System evaporators
Pressure/temperature relationship
System accessories
Refrigerants and refrigerant properties
The Pressure Enthalpy diagram
Refrigerant management
EPA regulations
Piping Operations - 20 req. hrs
Safety-related issues
Piping materials
Cutting and reaming
Flaring
Swaging
Tubing bending
The torch kit: Air-acetylene
The torch kit: Oxy-acetylene
Soldering
Brazing
Steel pipe operations
Plastic pipe
Compression fittings and other mechanical piping connections
Tools and Equipment - 20 req. hrs
General Tools
Specialized Hand Tools
Tubing Tools
Specialized Service and Installation Equipment
Refrigerant Leak Detectors
Other Tools
Miscellaneous Tools and Equipment for Specialized Needs
Basic Electricity - 20 req. hrs
Atomic Theory
Positive and Negative Charges
Flow of Electrons
Conductors and Insulators
Electric Potential
Current Flow
Resistance
Electric Power and Energy
Ohm's Law
Calculating Electric Power
Electrical Theory - 20 req. hrs
Loads
Contactors and Relays
Magnetic Starters
Switches
Safety Devices
Transformers
Schematic Diagrams
Pictorial Diagrams
Installation Diagrams
Components, Symbols, and Circuitry of Air-Conditioning Wiring Diagrams - 20 req. hrs
Starting Relays for Single-Phase Motors
Current or Amperage Relays
Potential Relays
Solid-State Starting Relays and Devices
Motor Bearings
Motor Drives
Electrical Meters - 20 req. hrs
Electric Meters
Ammeters
Voltmeters
Ohmmeters
Introduction to Automatic Controls - 20 req. hrs
Types of Automatic Controls
Devices that Respond to Thermal Change
The Bimetal Device
Rod and Tube
Snap-Disc.
Control by Fluid Expansion
The Thermocouple
Electronic Temperature-Sensing Devices
Automatic Device Applications - 20 req. hrs
Temperature Controls
Low-Voltage Space Temperature Controls
Electrical Contacts
Heat Anticipator
Cold Anticipator
Thermostat Cover
Thermostat Assembly
The Subbase
Line-Voltage Space Temperature Controls
The Switching Mechanism
The Sensing Element
The Cover
Subbase
Sensing the Temperature of Solids
Measuring the Temperature of Fluids
Pressure-Sensing Devices
Pressure Transducers
High-Pressure Controls
Low-Pressure Controls
Oil Pressure Safety Controls
Air Pressure Controls
Gas Pressure Switches
Switchless Devices that Control Fluid Flow
Water Pressure Regulators
Gas Pressure Regulators
Mechanical and Electromechanical Controls
Maintenance of Mechanical Controls
Maintenance of Electromechanical Controls
Advanced Automatic Controllers - 20 req. hrs
Control Applications
Types of Control Systems
Pneumatic Controls
Cleaning and Drying Control Air
Control Components
Direct Digital Controls (DDCs)
Residential Electronic Controls
Electric Motors - 60 req. hrs
Types of Electric Motors
Uses of Electric Motors
Parts of an Electric Motor
Electric Motors and Magnetism
Determining a Motor’s Speed
Start Windings
Starting and Running Characteristics
Electrical Power Supplies
Single-Phase Open Motors
Split-Phase Motors
The Centrifugal Switch
The Electronic Relay
Capacitor-Start Motors
Capacitor-Start, Capacitor-Run Motors
Permanent Split-Capacitor Motors
Shaded-Pole Motors
Three-Phase Motors
Single-Phase Hermetic Motors
The Potential Relay
Potential Relay Specifications
Troubleshooting
The Current Relay
Positive Temperature Coefficient Resistor (PTCR)
Troubleshooting the PTCR
Two-Speed Compressor Motors
Special Application Motors
Three-Phase Compressor Motors
Variable-Speed Motors
DC Converters (Rectifiers)
Inverters and Variable Frequency Drives (VFDs)
Operation of the VFD
Electronically Commutated Motors (ECMs)
Cooling Electric Motors
Application of Motors - 30 req. hrs
Motor Applications
The Power Supply
Electric-Motor Working Conditions
Insulation Type or Class
Types of Bearings
Motor Mounting Characteristics
Motor Drives
Motor Controls - 20 req. hrs
Introduction to Motor Control Devices
Full-Load and Locked-Rotor Amperage
The Relay
The Contactor
Motor Starters
Motor Protection
Inherent Motor Protection
External Motor Protection
National Electrical Code® Standards
Temperature-Sensing Devices
Magnetic Overload Devices
Restarting the Motor
Troubleshooting Electric Motors - 20 req. hrs
Motor Troubleshooting
Mechanical Motor Problems
Removing Drive Assemblies
Belt Tension
Pulley Alignment
Electrical Problems
Open Windings
Shorted Motor Windings
Short Circuit to Ground (Frame)
Single-Phase Motor Starting Problems
Checking Capacitors
Identification of Capacitors
Wiring and Connectors
Troubleshooting Hermetic Motors
Service Technician Calls
Comfort and Psychometrics - 20 req. hrs
Comfort
Food Energy and the Body
Heat Transfer to and from the Body
The Comfort Chart
Psychometrics’
Moisture in Air
Absolute and Relative Humidity
Superheated Gases in AIR
Dry-Bulb and Wet-Bulb Temperatures
Dew Point Temperature
Enthalpy
The Psychometric Chart
Plotting on the Psychometric Chart
Fresh Air, Infiltration, and Ventilation
Building Air-Conditioning Specifications
Air-Conditioning System Refrigerants and Components - 20 req. hrs
Introduction to Refrigeration
Refrigeration
Rating Refrigeration Equipment
The Refrigeration Process
Temperature and Pressure Relationship
Refrigeration Components
The Evaporator
The Compressor
The Condenser
The Refrigerant Metering Device
Matching Refrigeration Systems and Components
Refrigerants
Refrigerants Must be Safe
Refrigerants Must be Detectable
The Boiling Point of the Refrigerant
Pumping Characteristics
Popular Refrigerants and Their Important Characteristics
Refrigerant Cylinder Color Codes
Recovery, Recycling, or Reclaiming of Refrigerants
Plotting the Refrigerant Cycle
Plotting the Refrigerant Cycle for Blends with Noticeable Temperature Glide (Zeotropic Blends)
Refrigeration Applied to Air-Conditioning - 20 req. hrs
Refrigeration
Structural Heat Gain
Evaporative Cooling
Refrigerated Cooling or Air-Condition
Ning
Package Air-Conditioning
Split-System Air-Conditioning
The Evaporator
The A-Coil
The Slant Coil
The H Coil
Coil Circuits
Microchannel (Flat-Plate-And-Fin) Technology
The Function of the Evaporator
Design Conditions
Evaporator Application
The Compressor
The Reciprocating Compressor
Compressor Speeds (RPM)
Cooling the Compressor and Motor
Compressor Mountings
The Rotary Compressor
Stationary Vane Rotary Compressor
Rotary Vane Rotary Compressor
The Scroll Compressor
The Condenser
Side-Air-Discharge Condensing Units
Top-Air-Discharge Condensers
Condenser Coil Design
High-Efficiency Condensers
Condenser Cabinet Design
Expansion Devices
Air-Side Components
Installation Procedures
Commercial, Packaged Rooftop, Variable Refrigerant Flow, and Variable Air Volume Systems - 20 req. hrs
Rooftop Package Units
Installation of Packaged Rooftop Units
Economizers
Economizer Modes of Operation
Ashrae Standard 62
Demand Control Ventilation (DCV)
Traditional Constant-Volume Air Distribution Methods
Variable Air Volume (VAV) Systems
Blowers on VAV Systems
VAV Boxes and Terminal Units
Hot Water in the Reheat Coils
Chilled-Water VAV Systems
Variable Refrigerant Flow (VRF) Systems
Dry Coolers
Air-Conditioning Troubleshooting - 20 req. hrs
Typical system operating conditions
Superheat and sub cooling review
Using sub cooling to evaluate systems with thermostatic expansion valves
Using superheat to evaluate systems with other metering devices
New generation refrigerants
Adjusting the refrigerant charge
Refrigerant Management - 20 req. hrs
Refrigerants and the Environment
Ozone Depletion
Global Warming
Refrigerants
CFC Refrigerants
HCFC Refrigerants
HFC Refrigerants
Hydrofluoric-Olefin (HFO) Refrigerants
Hydrocarbon (HC) Refrigerants
Naming Refrigerants
Refrigerant Blends
Popular Refrigerants and Their Compatible Oils
Refrigerant Oils and Their Applications
Oil Groups
Regulations
Recover, Recycle, or Reclaim
Methods of Recovery
Mechanical Recovery Systems
Recovering Refrigerant from Small Appliances
Reclaiming Refrigerant
Refrigerant Retrofitting
Refrigerants and Tools in the Future
Hydrocarbon (HC) Refrigerants
Naming Refrigerants
Refrigerant Blends
Popular Refrigerants and Their Compatible Oils
Refrigerant Oils and Their Applications
Oil Groups
Regulations
Recover, Recycle, or Reclaim
Methods of Recovery
Mechanical Recovery Systems
Recovering Refrigerant from Small Appliances
Reclaiming Refrigerant
Refrigerant Retrofitting
Refrigerants and Tools in the Future
Commercial Refrigeration Systems - 122 req. hrs
Technician Soft Skills
Typical Operating Conditions and System Components
Special Refrigeration System Components
Refrigeration System Applications
Ice-Making Systems
Special Refrigeration Applications
Troubleshooting Commercial Refrigeration Systems
System Installation, Air Distribution, and Balance - 80 req. hrs
System Installation and start-up
Air Distribution and Balance
Energy Auditing
Indoor air Quality
System Diagnostics, Troubleshooting, and Servicing - 100 req. hrs
Normal Operating Conditions
Troubleshooting Air Systems
Electrical versus Mechanical Problems
Performing a Successful Service call
Residential Energy Auditing
Heating Systems - 190 req. hrs
Electric Heating Systems
Gas-Fired Heating Systems
Oil-Fired Heating Systems
Hydronic Heating Theory
Advanced hydronic
All-Weather Systems
