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Hvacr 201

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ISBN-10: 1418066648

ISBN-13: 9781418066642

Edition: 2010

Authors: John E. Hohman, Joseph Moravek, John E. Hohman

List price: $96.95
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Description:

The second installment in a series of useful and resourceful guides, HVACR 201, continues to build upon the basics of the HVACR trade. The result of a joint effort by industry leading Air Conditioning Contractors of America (ACCA), Plumbing-Heating-Cooling Contractors National Association Educational Foundation (PHCC), and the Refrigeration Service Engineers Society (RSES), the book begins with simpler HVACR concepts and progresses into increasingly complex theories and skills. Starting with coverage of all of the important components of a system, the book advances to deal with topics in electrical ,heating, motors , and cooling- then moving to troubleshooting and installation procedures.…    
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Book details

List price: $96.95
Copyright year: 2010
Publisher: Delmar Cengage Learning
Publication date: 6/17/2009
Binding: Paperback
Pages: 464
Size: 8.39" wide x 10.59" long x 0.87" tall
Weight: 2.376
Language: English

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.…    

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