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HVACR 201
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Table of Contents

1)Year 2, First Semester
a)Chapter One: Review of Refrigeration Cycle
i)Basic refrigeration cycle
ii)Saturation, superheat and subcooling
iii)Compressors
iv)Metering devices
v)evaporators
b)Chapter Two: Compressors
i)Reciprocating
ii)Scroll 2 stage
iii)Hermetic and semi-hermitic
iv)Rotary types, how they work, applications
c)Chapter Three: Refrigerants and Lubricants
(1)Applications and required lubricants
(2)CFCs, HCFCs, chemical strength
(3)Safety and handling
(4)EPA certification
(5)Recovery and recycle
d)Chapter Four: Refrigerant Handling Certification
e)Chapter Five: Condensers
(1)Air cooled
(2)Water cooled
(3)Evaporative
f)Chapter Six: Metering Devices
i)Capillary tubes
ii)Fixed orifice/plate
iii)Thermostatic expansion valves (TXV)
iv)Electronic expansion valves (EXV)
g)Chapter Seven: Accessories
i)Receivers
ii)Accumulators
iii)Service valves/access ports
iv)Suction/liquid line heat exchangers
v)Low ambient controls
vi)Reversing valves (defrost, heat pump)
vii)Relief valves
viii)High/low pressure control
ix)Vibration eliminators
x)Crankcase heater
h)Chapter Eight: Evaporators
i) Types (plate, fin) and applications
ii) Latent and sensible heat removal
iii) Superheat
iv) Direct expansion and flooded
v) Pressure drop
vi) Moisture removal
vii) Defrost applications
i)Chapter Nine: Evacuation and Charging
i)Leak testing methods
ii)Troubleshooting
iii)Recovery
iv)Vacuum pumps
v)Dehydration
vi)Safety
j)Chapter Ten: Heating
i)Types of heating appliances
ii)Components, burners and valves
iii)Boilers: water and stream
iv)Sequence of operation
v)Pumps
vi)Venting
vii)Gas pipe capacity
viii)Ignition devices
ix)Combustion process and testing
x)Code and safety
xi)Carbon monoxide
xii)Electric and strip
xiii)Radiant
xiv)Venting
xv)Combustion and secondary air
xvi)Gas manifolds
xvii)Temperature controls
xviii)Safety and Limit controls
xix)Sequence of operation
k)Chapter Eleven: Electrical
i)Ohms law review and application
ii)Transformers, voltage, line vs load
iii)Types of wire and wire sizes
iv)Circuits and schematics
v)Relays
vi)Capacitors
vii)XFMR
viii)Logic
ix)Sources: single and 3 phase
x)Switches and loads
xi)Contactors
xii)Troubleshooting/testing
xiii)Starters
xiv)Overload protectors/overcurrent protection (fuses & circuit breakers)
xv) Overcurrent/fuses
xvi)Grounding
xvii)Breakers
xviii)OCPDs
xix)Bonding
xx) Sizing
xxi)Disconnects and wire sizing
l)Chapter Twelve: Electrical Troubleshooting
i)Symptoms, possible causes and application to instrumentation
ii)Circuits, complete, short, open and grounded
iii)Troubleshooting
iv)Effects of loose wire connections
v)Wiring diagrams used for troubleshooting
vi)Use of meter/with electrical schematics
vii)Shorts, open, grounds
viii)Loose neutrals
m)Chapter Thirteen: Introduction to Motors
i)Types of motors: squirrel cage, induction, single phase, dual phase, three phase and variable speed
ii)Magnetism
iii)Induced current
iv)Electromagnetism
v)Motor torque
vi)Starting relays
vii)Starting switch
viii)Starting, relays
ix)Efficiency
x)Heat and temperature
xi)Dimensions
xii)Identifying motor start and run windings
xiii)Mechanical and installation considerations
xiv)Shafts
xv)Lubrication and bearings
xvi)Noisy operation
xvii)Electrical connections
xviii)Operating limitations
xix)Motor overload protections
xx)Nameplate data
2)Year Two, Second Semester
a)Chapter Fourteen: Cooling Equipment
i)Types of units: RTU, split, package, unitary, built-up, matched, ductless, chillers (air and water cooled), cooling tower, chilled water, CW, water treatment intro, pumping
ii)Fluids
iii)Closed vs open loop
iv)Basic sizing
v)CFM/ton
vi)Sensible vs. latent heat
vii)Velocity over face of coil
viii)Economizers
ix)Outside air
x)Duct sizing - supply vs. return
xi)Duct calculator
b)Chapter Fifteen: Mechanical Troubleshooting
i)Troubleshooting: refrigeration, A/C, furnace and air flow problems
ii)Case studies of components/systems
iii)Symptoms/problems/causes; refrigeration, cooling, heating, CSI
c)Chapter Sixteen: Advanced Installation Techniques
i)Best practices
ii)Piping: Dielectric unions and support
iii)Duct sealing systems
iv)Common code violations and solutions
v)Vibration and noise issues
d)Chapter Seventeen: Control Systems
i)Types of thermostats
ii)Built-in thermostat functions
iii)Heating/cooling controls
iv)Sequence of operation
v)Troubleshooting components
vi)Pressure switches
vii)Loss of charge
e)Chapter Eighteen: Psychrometrics
i)Why learn psychrometrics?
ii)Psychrometric chart terminology
iii)Human comfort zone
iv)Gas laws
v)Sling psychrometer
vi)What do the lines on the psychrometric chart mean?
vii)Using the psychrometric chart
viii)Finding the properties of air
ix)IAQ: mold and moisture issues
x)Moisture control: humidification and dehumidification, system, room or whole house moisture control
f)Chapter Nineteen: Basic Sizing
i)Heat transfer theory
ii)Steps in sizing equipment
iii)Importance of heating and cooling load calculations
iv)Relationships between load, equipment and duct
v)Location of ducts/proper installation/sealing
vi)Why match condensers, evaporators and blowers?

About the Author

John Hohman has over 35 years as a member of RSES. He has also held positions as n installer, serviceman, designer, and engineer in HVACR. He holds a patent in cascade refrigeration. He is an instructor, department chair, and administrator for several colleges. He is also a consultant and trainer for the industry. Joseph Moravek is the HVACR director at Nance Universal HVACR Technical School in Beaumont, Texas, where he is responsible for short- and long-term training course development and updating curriculum. He also occasionally teaches local and overseas HVACR classes for Nance. In addition, he serves as a consultant with Mechanical Training Service, Houston, Texas, doing EPA training, continuing education for contractors and other custom developed coursework. A licensed air conditioning and refrigeration contractor in the state of Texas, he holds several ICE and NATE certifications, is a member of the ASHRAE, CARE and AEE professional organizations and has a master's degree in education. Mr. Moravek started in the HVACR profession in 1976 doing heat load calculation for a federally-funded weatherization program. His experience also includes working as an HVACR technician and inspector for the city of Houston. He served as the HVACR lead instructor at Lee College for 14 years.

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