2012 - 2013 catalog - Delta College

Refrigeration, Heating & Air Conditioning
RHA 121 Fundamentals of Refrigeration & A/C 3 Sem Hrs
Examines the physical, gas, and chemical laws of refrigeration. Develops
an understanding of the theory of heat, temperatures, pressures of gases
and thermodynamics. Analyzes basic refrigeration cycle and components
such as vacuum pumps, gauges, and (PT) Pressure Temperature Charts.
Develops an understanding of units on safety and EPA Refrigerant
Certification. Credit may be earned in RHA 121 or SKPT 121 but not
in both. (35-10)
RHA 122 Refrigeration & A/C Service I 3 Sem Hrs
Prerequisites: RHA 121. Focuses on concepts of common types of
domestic refrigerators, dehumidifiers, and portable air conditioners.
Develops an understanding of special references involving the essentials
of construction of complete refrigeration systems. Presents theory and
principles underlying repairing refrigeration appliances and practical
shop work through classroom demonstrations and lab experiments.
Credit may be earned in either RHA 122 or SKPT 122 but not in both. (35-10)
RHA 123 Commercial Refrigeration Flow
Controls I
3 Sem Hrs
Prerequisite: RHA 122. Develops an understanding of basic skills
necessary for servicing of commercial units such as walk-in coolers, reachins,
display cases, and commercial icemakers. Analyzes refrigeration flowcontrol
components, system components, and piping practices. Credit
may be earned in either RHA 123 or SKPT 123 but not in both. (35-10)
RHA 124 Refrigeration & A/C Service II 3 Sem Hrs
Prerequisite: RHA 122. Develops an understanding of operational
skills in trouble shooting domestic refrigeration and air conditioning
systems. Focuses on electrical components and system parts in frostfree,
conventional and cyclematic units, and portable air conditioning
units. Credit may be earned in either RHA 124 or SKPT 124 but not in
both. (35-10)
RHA 126 Refrigerant Piping & Practices 3 Sem Hrs
Provides instruction in proper methods of brazing joint design using
oxyacetylene torches. Develops skills to correctly size, lay out, and
install tubing and piping in refrigeration and heating systems. Covers
flow capacities of tubing and piping. Examines techniques to cut pipe
threads, use pipe fittings, form swag and flare joints, work with plastic
vent pipe and plastic drainpipe, work with high temperature solders
and fluxes and learn about fastening devices. (35-10)
RHA 135 Heating System Fundamentals 3 Sem Hrs
Focuses on the principles of heating systems, types of fuels, electric
heating, venting for combustion furnaces, and the methods of correct
duct design through lecture and demonstration. Develops skills and basic
knowledge of furnace components, testing, and operations. Reviews
indoor air quality enhancements and basic mechanical codes for heating
and gas piping installations. Credit may be earned in RHA 135 or SKPT
126 but not in both. (35-10)
RHA 136 Heating Service Fundamentals 3 Sem Hrs
Prerequisite RHA 140 and RHA 135. Examines the electrical schematics on
most gas furnace manufacturers’ equipment and perform live diagnostics
using the multi meters wiring diagrams and shop furnaces. Tests for gas
pressures, gas flow rates, and correct air flow measurement. Focuses on
diagnostics involving the electrical circuits, airflow rates, gas pressures,
gas flow rates and trouble-shooting the furnaces. (35-10)
RHA 140 Applied Electricity I 3 Sem Hrs
Prerequisite: MATH LEVEL 4. Covers basic fundamentals of electricity
that include introductory schematic symbols and basic electrical circuits,
Ohms law, power formulas, series and parallel circuit rules, combination
circuits, magnetism, capacitance, inductance and reactance in electrical
DC and AC circuits. Applies the above fundamentals to electrical
circuits and electrical schematics; calculate voltage, current, resistance
and wattage as they apply in an electrical circuit; interpret electrical
problems on the refrigeration or heating unit. Uses the multi meter as an
Ohmmeter, as a voltmeter, and as an amp meter. Credit may be earned
in RHA 140 or SKET 106 but not in both. (45-0)
RHA 142 Sheetmetal Layout I 3 Sem Hrs
Analyzes and develops geometrical structures, intersections by radial and
triangulation methods of sheet metal layout, the drawing of development
layouts, and the forming of actual models with sheet metal. Credit may
be earned in RHA 142 or SKMT 171, but not both. (35-10)
RHA 146 Residential Air Conditioning
Systems
3 Sem Hrs
Prerequisite: RHA 121 and RHA 126. Develops skills related to mechanical
air conditioning equipment used in comfort cooling and heat pump
applications. Examines split and self-contained air conditioning systems.
Evaluates and trouble-shoots diagnostics, proper piping, charging
methods, and wire diagrams. (35-10)
RHA 150 Refrigerant Certification 1 Sem Hr
Focuses on the EPA mandates for refrigerant recovery instruction and
testing. Prepares for the EPA Refrigeration Certification test. Covers
concepts of information a technician will require to successfully complete
the test. You must achieve a score of 80% or higher in 4 test areas to
be eligible for certification. Those tests are the Core Area Test, Type I
Certification, Type II Certification, and Type III or Universal Certification.
To earn an EPA approved Refrigeration Certification License you must
pass the Refrigeration Certification test. (15-0)
RHA 210W Commercial Air Conditioning 3 Sem Hrs
Prerequisite: MATH LEVEL 4 and RHA 146. Develops an understanding
of AC electrical fundamentals concerning the operation, installation, and
analysis of HVACR components and control circuits used in commercial
air conditioning systems. Examines single- and poly-phase transformers
and motors, heating and air conditioning controls, commercial timers,
motor starters, contactors, relays, and other control devices. Focuses on
rooftop units, split system air-conditioning units, and self-contained
air-conditioning units. Includes hands-on training on wiring diagrams,
wiring projects, and sealed systems. (35-10)
RHA 225 Commercial Refrigeration II 3 Sem Hrs
Prerequisite: RHA 123. Develops additional skills and understanding
in the servicing of commercial units such as walk-in coolers, reach-ins,
display cases, and commercial icemakers. Focuses on electrical systems
and diagrams. Analyzes single-phase systems and three-phase systems.
Credit may be earned in either RHA 225 or SKPT 225, but not in both.
(35-10)
RHA 230 Design of HVAC Systems 5 Sem Hrs
Prerequisite: RHA 135. Focuses on heat gain and loss in residential and
commercial structures with both forced air and hydronics representation.
Explores computerized and manual load calculations and air system
instrumentation in the lab sessions. Develops skills in use of Manual J
and Manual D computer editions for heat load and duct sizing. (45-30)
RHA 233W Commercial Refrigeration III 5 Sem Hrs
Prerequisite: RHA 122 and RHA 225. Examines and identify refrigeration
units associated with supermarket applications and the food industry.
Diagnoses multiplex systems and self-contained equipment for medium/
low temperature applications such as piping and trouble shooting
mechanical and electrical components. (45-30)
RHA 235 Hydronic and Oil Heating
Fundamentals
3 Sem Hrs
Prerequisite: RHA 135. Explains parts of the hydronic systems and
oil furnaces that include the operating sequences for safe, efficient
combustion and flame safety. Trouble-shoots electrical and electronic
control systems, flame safety, and mechanical problems on oil fired
furnaces, boilers, hydronic systems, and wire diagrams. (35-10)
RHA 290-299 Special Projects in
Refrigeration/Heating & Air Conditioning
Delta College 2012-2013
409