Maricopa Community Colleges  IMC124   19962-20086 
Official Course Description: MCCCD Approval: 07/22/08
IMC124 19962-20086 LEC 1 Credit(s) 1 Period(s)
Intermediate Heating, Ventilating, and Air Conditioning
Types, components and operating principles of control systems, thermostats, and heat pumps.
Prerequisites: IMC116 or permission of Instructor.
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MCCCD Official Course Competencies:
 
IMC124   19962-20086 Intermediate Heating, Ventilating, and Air Conditioning
1. Describe the types, components and uses of air conditioning control systems. (I)
2. Explain the types, basic components, uses, and adjustment of select thermostats. (II)
3. Interpret schematic diagrams of selected control systems and/or components. (III)
4. Demonstrate skill in the installation and service of selected controls and/or control system members. (IV)
5. Explain the operation and components of an electric furnace. (V)
6. Perform operational and safety checks on control systems. (VI)
7. Describe the principles related to heat pumps. (VII)
8. Describe the types, classification and advantages of specific heat pumps. (VIII)
9. List the components of heat pump installations. (IX)
10. Describe the heat pump installation and service procedures. (X)
11. Identify refrigerant circuit accessories commonly associated with heat pumps. (XI)
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MCCCD Official Course Outline:
 
IMC124   19962-20086 Intermediate Heating, Ventilating, and Air Conditioning
    I. Controls
        A. Types and uses
        B. Electrical controls
          1. Components
          2. Circuits
        C. Pneumatic controls
          1. Components
          2. Applications
        D. Solid state controls
          1. Schematic descriptions
          2. Control system checkout
        E. Damper motor installation
      II. Thermostats
          A. Heating-only thermostat
            1. Adjusting thermostat indicators
            2. Adjusting heat anticipators
          B. Cooling-only thermostats
          C. Heating-cooling thermostats
            1. Control circuitry schematics
            2. Energy-saving thermostats
          D. Modulating controls
          E. Thermostat installation
          F. Servicing thermostats IMC124Effective Term:
        III. Schematic diagrams
            A. System schematics
            B. Component schematics
            C. Interpretation
          IV. Thermostat installation and servicing
              A. Installation procedure
              B. Servicing
            V. Electric furnaces
                A. General description
                  1. Basic operation
                  2. Major components
                B. Heating elements
                  1. Construction and operation
                C. Furnace controls
              VI. Operational and safety checks
                  A. Line voltage
                  B. Low voltage
                  C. Checking loads
                  D. Replacing resistance wires
                  E. Determining British Thermal Unit Hour (Btuh) output
                  F. Safety with electrical circuits
                  G. Calculating cubic feet per minute (CFM)
                VII. Heat pumps
                    A. Reverse-cycle principle
                    B. Measurement of performance
                      1. Coefficient of performance
                      2. Performance factor
                      3. Energy efficiency ratio
                      4. Balance point
                    C. Description of operation
                      1. Defrosting
                  VIII. Heat pump classification
                      A. Air-to-air heat pumps
                        1. Auxiliary heaters
                        2. Defrosting
                        3. Advantages
                      B. Water-to-water heat pumps
                        1. Valves
                        2. Advantages
                      C. Water-to-air heat pumps
                        1. Advantages
                      D. Air-to-water heat pumps
                        1. Compression
                        2. Advantages
                      E. Ground source heat pumps
                      F. Special heat source pumps IMC124Effective Term:
                    IX. Heat pump components
                        A. Reversing valve
                        B. Metering devices
                        C. Removing moisture
                        D. Liquid accumulator
                        E. Thermostat
                        F. Pressure control
                        G. Heaters
                      X. Installation and service procedures
                          A. Mounting
                          B. Indoor section
                          C. Packaged units
                          D. Service
                        XI. Circuit accessories
                            A. Electric heater
                            B. Furnaces
                            C. Thermostats and switches
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