Feb 06, 2023
HAC 221 - Circuits and Controls for HVAC 1
3 Lecture Hours
Prerequisites: 15 HAC credits or departmental approval.
Green building performance is related to energy usage. HVAC circuits and controls contribute to the efficient use of energy. In this course students explore the basic application of electric on/off control and electric proportional control before discussing proportional control through the application of pneumatics.
Upon successful completion of the course, the student will:
- Identify the three major categories of a control system.
- Interpret the sequence of operation for two- and three-wire control circuits, timed circuits and interlock circuits based on the ladder diagram.
- Describe the sequence of operation and function of an economizer.
- Differentiate on/off, floating and modulating controls in a control system.
- Identify campers, actuators, valves and positioners in relation to their application for energy efficiency.
- Identify valve types as they relate to specific control sequence.
- Explain the use of 1-pipe and 2-pipe thermostats, humidistats, deadband and summer/winter and day/night thermostats and master/submaster control schemes.
- Developing a control system
- Types of control systems
- Electric control system applications: ladder diagrams, two- and three-wire control, interlock circuits, timed circuits, economizer circuits, flame safeguard theory, floating and modulating control
- Pneumatic controls systems applications: dampers, actuators, positioners, valves and valve actuators, air compressor and air supply system and system components such as 1-pipe, 2-pipe thermostats, humidistats, deadband thermostats, summer/winter and day/night thermostats and master/submaster control schemes
Instructor-approved textbook and materials. Instructor approved online learning management system, internet access and specified Personal protective equipment (PPE).
Students who successfully complete this course acquire general knowledge, skills and abilities that align with CCAC’s definition of an educated person. Specifically, this course fulfills these General Education Goals:
Approved By: Dr. Quintin B. Bullock Date Approved: 3/25/2021
- Information Literacy
- Quantitative & Scientific Reasoning
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