Refrigeration and HVAC Operating Engineer
(For Supervisors and Service Managers)

• Minimum age -Adult
• Education - High School Diploma, GED or equivalent
• Experience -Two years as a Refrigeration and HVAC Technician or AS Degree Air Conditioning and Supervise one or more Technicians and hold EPA CFC License
• Minimum Time in Previous Grade - 2 years
• Examination -Written (Oral or Practical when necessary)
• Maximum Prime Mover Horsepower (Unsupervised) -unlimited
• Maximum Refrigeration or Air Conditioning (Unsupervised) -unlimited

• Thermodynamics, Heat Transfer Theory
• Principles of heat and temperature measurement
• States of Matter
• Gas Laws - Boyle's Law, Charles' Law, Dalton's Law, General Principles of Perfect Gases
• Safe Handling, Transportation, and Disposal of Refrigerants, Manufacturer Certification R410A
• Hydrocarbon Refrigerant Oils
• Ammonia (Refrigerant)
• Lithium Bromide (Absorbent)
• Principles of Pressure and Pressure Measurement
• Refrigeration Cycle (Compression/Hydrocarbon Refrigerants)
• Hydrocarbon Refrigerant
• EPA Universal Certified
• Refrigeration System Components - Evaporators and Condensers, Heat Exchangers
• Compressors (Electric Motor or Engine-Driven) Reciprocating, Screw, Scroll, Rotary-Helical, Centrifugal
• Metering Devices (Direct Expansion/Hydrocarbon Refrigerants) Capillary Tube, Orifice, Expansion Valves (TXV, AXV, TAXV) Hot Gas Bypass Valves, Condenser Pressure Regulating Valves
• Air Conditioning Systems
  Package Systems (Gas/Electric, Heat Pump, Oil/Electric, Etc.), Window Units, Portal Units (Thru-The-Wall), Rooftop Units (HVAC, Vav), Unitary Systems (Split Systems), Condensing Units, Air Handling or Fan Coil Units, Refrigerant Piping, Line Sizing, Installation
• Heat Pump Systems
  Air Source, Water Source, Ground Source, Supplemental or Cascade
• Cooling Towers /Evaporative Coolers
• Thermal Storage Systems
• Refrigeration Systems (Commercial)
  Coolers and Freezers (Walk-In, Reach-In, Display), Refrigerated Air Dryers and Ice Machines
• Psychometrics
• Temperature and Humidity Control Systems
• Air Filtration and Duct Cleaning
• Air Quality Measurement and Control
  CO2, CO, O2, 0, and Contaminant Testing
• Fans
• Pumps (Water/Fluids)
• HVAC Electrical Fundamentals
• HVAC Electrical Components
  Wiring Insulation and Sizing, Fuses, Breakers, Starters – Low Voltage (480 Volts Or Less), High Voltage (208 Through 4,800 Volts or more), Automated Switchgear, Current Sensing Meters and Motor Control
• Electromechanical Controls
• Pneumatic Controls
• DDC Controls for Building Automation
• Computer Literacy
  Identify and Work With Existing Applications (Excel, Word, Powerpoint, Access, Outlook)
• Electric Transformers
• DC Power Supplies and Converters
• UPS Systems
• Variable Frequency Drives
• Electric Motors (AC and DC)
• Engine Driven Suppressers and Pumps
• Troubleshooting ACR Electrical Systems
  Personal Protective Equipment, Lockout/Tagout Practices, Meter Categories, Test Procedures, Electrical Diagrams, Schematic (Ladder) Diagrams, Pictorial Diagrams, Installation Diagrams, Fundamentals Of Electrical Trouble Shooting, Trouble Shooting Electrical Components.
• ACR System
  Service System Base Lining, Service Equipment and Practices, System Start-Up, Operational Checks. Preventive Maintenance and Mechanical Troubleshooting.