Level 2

Table of Contents

RACM-200 Pressure Enthalpy Diagrams and System Analysis

Learning Outcomes:

  • Demonstrate knowledge of pressure enthalpy diagrams and their use in troubleshooting refrigeration systems.

Objectives and Content:

  1. Define terminology associated with pressure enthalpy diagrams and system analysis.
  2. Locate and interpret information found on pressure enthalpy diagrams.
  3. Identify the factors affecting system capacity and explain their effect.
    1. saturated discharge temperature
    2. saturated suction temperature
    3. liquid sub-cooling
    4. suction superheat
    5. suction to liquid heat exchange
    6. high and low side pressure drops
  4. Explain theoretical horsepower and brake horsepower.
  5. Explain the effects of pressure drop in refrigeration piping.
  6. Explain the concept of system equilibrium and the factors that determine system balance.
  7. Explain the effects of an unbalanced system on system performance.
  8. Plot a refrigeration cycle using a pressure enthalpy diagram and perform associated calculations.
  9. Apply cycle diagrams to assist with system troubleshooting.

RACM-205 Evaporators

Learning Outcomes:

  • Demonstrate knowledge of evaporators, their components and their operation.
  • Demonstrate knowledge of the procedures used to install evaporators and their components.
  • Demonstrate knowledge of the procedures used to maintain and troubleshoot evaporators and their components.

Objectives and Content:

  1. Define terminology associated with evaporators and their components.
  2. Identify hazards and describe safe work practices pertaining to evaporators and their components.
  3. Interpret codes and regulations pertaining to evaporators and their components.
  4. Interpret information pertaining to evaporators and their components found on drawings and specifications.
  5. Identify specialized tools and equipment used with evaporators and their components, and describe their applications and procedures for use.
  6. Explain the purpose and operation of evaporators and their components.
  7. Identify types of evaporators and describe their characteristics and applications.
    1. counter, cross and parallel flow
    2. direct expansion, flooded and liquid overfeed
    3. forced and induced
    4. plate or eutectic
    5. brazed plate/plate and frame
    6. primary and secondary surface
    7. chiller barrel (fluid cooler)
  8. Identify evaporator components, and describe their characteristics and applications.
    1. drain pan heaters
    2. evaporator fans and controls
    3. drain lines
    4. flow switches
  9. Describe defrost methods and identify their associated electrical and piping considerations.
  10. Identify the factors and conditions that determine evaporator capacity and efficiency.
  11. Describe the procedures used to size evaporators.
  12. Identify the factors to consider when selecting evaporators and their components for installation.
  13. Describe the procedures used to install evaporators and their components.
  14. Describe the procedures used to maintain and troubleshoot evaporators and their components.
  15. Identify evaporator and component failures, and describe their causes and repair procedures.

RACM-210 Residential and Commercial Compressors

Learning Outcomes:

  • Demonstrate knowledge of the procedures used to install residential and commercial compressors and their components.
  • Demonstrate knowledge of the procedures used to maintain and troubleshoot residential and commercial compressors and their components.

Objectives and Content:

  1. Define terminology associated with residential and commercial compressors.
  2. Identify hazards and describe safe work practices pertaining to residential and commercial compressors.
  3. Interpret codes and regulations pertaining to residential and commercial compressors.
  4. Interpret information pertaining to residential and commercial compressors found on drawings and specifications.
  5. Identify specialized tools and equipment used with residential and commercial compressors, and describe their applications and procedures for use.
  6. Explain the purpose and operation of residential and commercial compressors and their components.
  7. Identify types of residential and commercial compressors, and describe their characteristics and applications.
    1. hermetic
      • reciprocating
      • scroll
      • rotary
      • swing
    2. semi-hermetic
      • reciprocating
  8. Identify residential and commercial compressor components, and describe their characteristics and applications.
  9. Describe compressor classifications according to temperature ranges and capacities.
  10. Identify the factors that affect compressor efficiency.
    1. compression ratio
    2. clearance volume
    3. wear
    4. types of valves
  11. Identify the factors to consider when selecting residential and commercial compressors and their components for installation.
  12. Describe the procedures used to install residential and commercial compressors and their components.
  13. Describe the procedures used to maintain and troubleshoot residential and commercial compressors and their components.
  14. Describe control strategies for compressor protection.
    1. solenoid drop
    2. pump out cycle
    3. pump down cycle
    4. pressure controls
  15. Identify residential and commercial compressor failures, and describe their causes and procedures for repair.
    1. mechanical
    2. electrical
  16. Describe the procedures used to start up, commission and shut down residential and commercial compressors.

RACM-215 Condensers

Learning Outcomes:

  • Demonstrate knowledge of condensers, their components and operation.
  • Demonstrate knowledge of the procedures used to install condensers and their components.
  • Demonstrate knowledge of the procedures used to maintain and troubleshoot condensers and their components.

Objectives and Content:

  1. Define terminology associated with condensers.
  2. Identify hazards and describe safe work practices pertaining to condensers.
  3. Interpret codes and regulations pertaining to condensers.
  4. Interpret information pertaining to condensers found on drawings and specifications.
  5. Identify specialized tools and equipment used with condensers, and describe their applications and procedures for use.
  6. Explain the purpose and operation of condensers and their components.
  7. Identify types of condensers and describe their characteristics and applications.
    1. air-cooled
    2. water-cooled
    3. evaporative
  8. Identify condenser components and describe their characteristics and applications.
  9. Describe heat reclaim strategies.
  10. Describe head pressure control strategies.
  11. Identify the factors and conditions that determine condenser capacity and efficiency.
  12. Identify the factors to consider when selecting condensers and their components for installation.
  13. Describe the procedures used to size condensers.
  14. Describe the procedures used to install condensers and their components.
  15. Describe the procedures used to maintain and troubleshoot condensers and their components.
  16. Identify condenser failures and describe their causes and procedures for repair.

RACM-220 Metering Devices

Learning Outcomes:

  • Demonstrate knowledge of metering devices, their components and operation.
  • Demonstrate knowledge of the procedures used to install metering devices and their components.
  • Demonstrate knowledge of the procedures used to maintain and troubleshoot metering devices and their components.

Objectives and Content:

  1. Define terminology associated with metering devices.
  2. Identify hazards and describe safe work practices pertaining to metering devices.
  3. Interpret codes and regulations pertaining to metering devices.
  4. Interpret information pertaining to metering devices found on drawings and specifications.
  5. Identify specialized tools and equipment used with metering devices, and describe their applications and procedures for use.
  6. Explain the purpose and operation of metering devices and their components.
  7. Identify types of metering devices and describe their characteristics and applications.
  8. Identify metering device components and describe their characteristics and applications.
  9. Identify the factors to consider when selecting and installing metering devices and their components.
  10. Describe the procedures used to install metering devices and their components.
  11. Describe the procedures used to maintain and troubleshoot metering devices and their components.
  12. Identify metering device and component failures and describe their causes and procedures for repair.

RACM-225 Refrigerant Flow Controls and Accessory Devices

Learning Outcomes:

  • Demonstrate knowledge of refrigerant flow controls and accessory devices, and their operation.
  • Demonstrate knowledge of the procedures used to install refrigerant flow controls and accessory devices.
  • Demonstrate knowledge of the procedures used to maintain and troubleshoot refrigerant flow controls and accessory devices.

Objectives and Content:

  1. Define terminology associated with refrigerant flow controls and accessory devices.
  2. Identify hazards and describe safe work practices pertaining to refrigerant flow controls and accessory devices.
  3. Interpret codes and regulations pertaining to refrigerant flow controls and accessory devices.
  4. Interpret information pertaining to refrigerant flow controls and accessory devices found on drawings and specifications.
  5. Identify specialized tools and equipment used with refrigerant flow controls and accessory devices, and describe their applications and procedures for use.
  6. Explain the purpose and operation of refrigerant flow controls and accessory devices.
  7. Identify types of refrigerant flow controls and accessory devices, and describe their characteristics and applications.
    1. direct-acting
    2. pilot-operated
  8. Identify the factors to consider when selecting and installing refrigerant flow controls and accessory devices.
  9. Describe the procedures used to install refrigerant flow controls and accessory devices.
  10. Describe the procedures used to maintain and troubleshoot refrigerant flow controls and accessory devices.
  11. Identify refrigerant flow controls and accessory device failures and describe their causes and procedures for repair.

RACM-230 Air Conditioning Fundamentals

Learning Outcomes:

  • Demonstrate knowledge of air conditioning fundamentals.
  • Demonstrate knowledge of air conditioning systems, their components and operation.
  • Demonstrate knowledge of psychrometrics.

Objectives and Content:

  1. Define terminology associated with air conditioning and psychrometrics.
  2. Explain air quality, air circulation and ventilation.
  3. Identify the factors that affect human comfort with respect to air quality.
  4. Identify specialized tools and instruments used to determine air quality, air circulation and ventilation.
  5. Identify types of air conditioning systems and their components, and describe their characteristics, applications and operation.
  6. Explain the fundamentals of psychrometrics
  7. Describe psychrometric processes.
    1. cooling
    2. evaporative cooling
    3. humidification
    4. heating and humidification
    5. heating
    6. heating and dehumidification
    7. dehumidification
    8. cooling and dehumidification
  8. Describe indoor and outdoor design conditions.

RACM-235 Air Movement and Indoor Air Quality

Learning Outcomes:

  • Demonstrate knowledge of air movement and indoor air quality components and their operation.
  • Demonstrate knowledge of the procedures used to install air movement and indoor air quality components.
  • Demonstrate knowledge of the procedures used to maintain and troubleshoot air movement and indoor air quality components.

Objectives and Content:

  1. Define terminology associated with air movement and indoor air quality.
  2. Identify hazards and describe safe work practices pertaining to air movement and indoor air quality components.
  3. Interpret codes and regulations pertaining to air movement and indoor air quality components.
  4. Interpret information pertaining to air movement and indoor air quality components found on drawings, specifications and curve charts.
  5. Identify specialized tools and equipment used with air movement and indoor air quality components, and describe their applications and procedures for use.
  6. Explain the purpose and operation of air movement and indoor air quality components.
  7. Identify types of air movement components, and describe their characteristics and applications.
    1. fans
      • axial
      • radial
    2. mechanical drives
      • belt
      • direct
  8. Identify factors that affect fan performance.
  9. Identify types of indoor air quality components, and describe their characteristics and applications.
    1. filter
    2. cleaner
    3. purifier
    4. humidifier
    5. exhaust/fresh air
    6. dehumidifier
  10. Identify the factors to consider when selecting and installing air movement and indoor air quality components.
  11. Describe the procedures used to install air movement and indoor air quality components.
  12. Describe the procedures used to maintain and troubleshoot air movement and indoor air quality components.
  13. Identify air movement and indoor air quality component failures and describe their causes and procedures for repair.
  14. Describe the procedures used to start up, commission and shut down air movement and indoor air quality components.

RACM-240 Control Fundamentals

Learning Outcomes:

  • Demonstrate knowledge of control fundamentals.
  • Demonstrate knowledge of controls, their components, applications and operation.

Objectives and Content:

  1. Define terminology associated with controls.
  2. Explain closed and open loop control.
  3. Explain the purpose and operation of control systems, devices and components.
  4. Identify types of control systems and their components, and describe their characteristics and applications.
    1. electromechanical
    2. electronic
    3. pneumatic
    4. direct digital control (DDC)
  5. Identify types of control devices, and describe their characteristics and applications.
    1. relays
    2. switches
    3. actuators
  6. Identify types of sensing controls, and describe their characteristics and applications.
    1. flow
    2. humidity
    3. liquid level
    4. pressure
    5. temperature
  7. Describe control and control actions.

RACM-250 Control Circuits and Wiring Diagrams

Learning Outcomes:

  • Demonstrate knowledge of the procedures used to install control circuit components.
  • Demonstrate knowledge of the procedures used to troubleshoot control circuits.
  • Demonstrate knowledge of wiring diagrams and their use.

Objectives and Content:

  1. Define terminology associated with control circuits and wiring diagrams.
  2. Identify hazards and describe safe work practices pertaining to control circuits.
  3. Interpret codes and regulations pertaining to control circuits.
  4. Interpret information pertaining to control circuits found in drawings, wiring diagrams, and schematic diagrams.
  5. Identify specialized tools and equipment used with control circuits, and describe their applications and procedures for use.
  6. Explain the purpose and operation of control circuits and their components.
  7. Identify types of control circuits and their components, and describe their characteristics and applications.
    1. operating
    2. safety
  8. Identify types of wiring diagrams and describe their characteristics and applications.
    1. pictorial
    2. schematic
    3. ladder
    4. component location
  9. Describe the sequence of operation of a control circuit and explain its relationship to its physical wiring configuration.
  10. Identify the factors to consider when selecting and installing control circuit components.
  11. Describe the procedures used to install control circuits and their components.
  12. Describe the procedures used to troubleshoot control circuits using wiring diagrams.
  13. Sketch a schematic wiring diagram based on a written sequence of control events.
  14. Sketch a schematic wiring diagram from a pictorial diagram.
  15. Sketch a pictorial diagram from a schematic wiring diagram.

RACM-255 Blueprints/Drawings and Specifications

Learning Outcomes:

  • Demonstrate knowledge of blueprints/drawings and specifications and their applications.

Objectives and Content:

  1. Define terminology associated with blueprints/drawings and specifications.
  2. Identify types of specification documents and describe their applications.
    1. manufacturers’
    2. engineers’
    3. contractors’
  3. Identify types of blueprints/drawings and describe their applications.
    1. civil/site
    2. architectural
    3. mechanical
    4. structural
    5. electrical
    6. shop drawings
    7. sketches
    8. as-built
  4. Identify views used on blueprints/drawings.
    1. elevation
    2. plan
    3. section
    4. detail
    5. 3-D
  5. Identify information found on blueprints/drawings.
    1. lines
    2. legend
    3. symbols and abbreviations
    4. title block
    5. notes and specifications
    6. schedules
    7. units of measurement (metric/imperial)
  6. Explain the use of blueprints/drawings measurement scales.
  7. Describe the procedures used to convert between metric and imperial units of measurement.
  8. Describe the procedures used to interpret and extract information from blueprints/drawings and specifications.
  9. Perform conversions between the metric and imperial systems of measurement.
  10. Perform a basic take-off from a blueprint/drawing.

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