Maricopa Community Colleges  HVA140AG   19932-20086 
Official Course Description: MCCCD Approval: 07/22/08
HVA140AG 19932-20086 LEC 0.50 Credit(s) 0.50 Period(s)
Heat Pumps: Electricity and Control Systems I
Basic electricity for heat pumps. Operation of electrical components and systems including common malfunctions and remedies.
Prerequisites: None.
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MCCCD Official Course Competencies:
 
HVA140AG   19932-20086 Heat Pumps: Electricity and Control Systems I
1. Describe the operation of permanent split capacitor motors, its component parts and electrical characteristics. (I)
2. Describe the construction of capacitors, the uses of capacitors and explain capacitor failures and testing. (II)
3. State the specific types of compressor motor failures and explain specific methods of protecting compressor motors. (III)
4. Explain the operation of "hard start" kits, the components and reasons for using them. (IV)
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MCCCD Official Course Outline:
 
HVA140AG   19932-20086 Heat Pumps: Electricity and Control Systems I
    I. Permanent Split Capacitor Motors
        A. Operation
        B. Component parts
          1. Start winding
          2. Run winding
          3. Run capacitor
        C. Electrical characteristics
          1. Back electro motive force
          2. (Z) impedence related to amp draw
      II. Capacitors, Construction, Uses, Failures and Testing
          A. Construction
            1. Start (electrolytes)
            2. Run
            3. Bleed resistors
          B. Uses
          C. Failures
            1. Shorts
            2. Opens
          D. Testing
            1. Ohm meter
            2. Specific capacitor testing meters
        III. Compressor Motor Failure and Motor Safety Devices
            A. Compressor motor failures
              1. Opens
              2. Shorts
              3. Grounds
              4. Burn out
            B. Safety devices
              1. Internal overload
              2. External overload
          IV. Hard Start Kits, Components and Reasons
              A. Operation
              B. Components
                1. Potential relay
                2. Run capacitor
              C. Reasons
                1. Refrigerant system problems
                2. Electrical system problems
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