RAC 40 - Air Conditioning I
- Prerequisite: RAC 32
RAC majors only. Second portion of electrical fundamentals. Topics include motors, control devices, control systems and trouble-shooting. Chemistry of air, air and human comfort, psychrometric properties of air, the psychrometric chart, problems for the conditioned air supply, conduction, solar transmission, occupancy and equipment heat gains and losses, coil load and total air supply.
24 hrs. lect./lab. per week
Student Learning Outcomes
Upon successful completion of RAC 40, the student will be able to:
- Demonstrate the ability to do technical work in a variety of heating, cooling and refrigeration fields.
- Apply safety standards and work with technical developments In the Industry.
- Identify and demonstrate correct use of tools, materials, and equipment used in the trade.
- Identify types of electric motors, state their typical applications, and sketch a diagram showing how they are wired into circuits.
- Identify the terminals to the start and run windings in a single-phase hermetic compressor.
- Evaluate a motor in a hermetic compressor to determine if it is electrically sound and safe to start.
- State the differences between a relay, contactor, and a starter, and describe the individual parts of each.
- Determine the setting of a refrigerant-type low pressure control and reset it for low-charge protection.
- Follow the circuit of a typical electric air-conditioning system.
- Check amperage in a low-voltage circuit.
- Take wet-bulb and dry-bulb temperature readings and determine relative humidity from the psychrometric chart.
- Use information to determine the level of comfort from the ASHRAE generalized comfort chart.
- Identify and describe various components in a typical air-conditioning system.
- State typical evaporator pressures and describe the results of reduced airflow across an evaporator.
- Determine proper charging procedures for varlouse air conditioning systems.
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