Ammonia Operator 2 is the next step of advanced technical training for the progressing ammonia operator. Ammonia operator 2 is not for a basic refrigeration roundsmen. This class is developed for passionate operators that want to drive their industrial ammonia refrigeration not only safely, but efficiently as possible. Of equal importance, ammonia operator 2 class is available in person and online. Each candidate for this class should have ammonia operator 1 credentials or the RETA CARO certification. We call this certification R-717 Operator 2. Furthermore, most successful students have at least two years industrial ammonia refrigeration experience before attempting Aptitudes needed for success in Ammonia Operator 2 are mathematics, observation, applied technology, locating information, and reading for information. The class in a person is a 4-day session and online you have six months to complete. Candidates who score well on ARTS certification test provided at the end of the course tend to do well on the RETA CIRO, TPC, and NUILPE certifications too. The Ammonia Operator 2 course entails a copy of the latest edition industrial ammonia refrigeration book 2 from RETA. Furthermore, this book is for the student to keep and reference not only during the class but their entire career. Topics to be covered are as follows:

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RETA CIRO Study Packet – Ammonia Operator 2
CRO / CIRO Screens – Ammonia Operator 2
- Normal to Abnormal Troubleshooting
- Brake Horse Power (BHP)
- Kilowatts (Kw)
- Power Cost in Dollars
- HP/TON
- Kw/TON
- Heat Transfer Equations
  - Sensible
  - Latent
- Compression Ratios
- Vacuum Conversions
- Saturation Charts
- Analyze RETA CIRO figures
  - Two Stage Systems
  - Top Fed DX Evaporators
  - Vessel and Piping / BFD / P&IDs
  - Forced Draft Evaporative Condenser
  - 3-way valve with reliefs
  - Pump Packages
  - Electrical Schematic
  - 24 screens from normal to abnormal conditions
  - MSDS Sheet for Ammonia
Industry Best Practices for Mechanical Integrity Inspections
- House Keeping
- Safe Engine Rooms
- RAGAGEP
- Equipment
- NDT
- Pipe Requirements
- Oil Draining Procedures
- Water Sampling
- Instrument Accuracy
- Inspection / Testing / Maintenance
- Annual Safety Testing
- 5 Year MI Inspection Requirements
- Annual Safety Inspections
Advanced Heat Transfer
- Tonnage Calculations
- Factors of Heat Transfer
- Thermal Conductivity
- Resistance
- U Factors
- Insulation Systems
- Non-Condensable Checks
- Advanced SAT / Subcooling / Superheating Characteristics & Calculations
- Forced Draft
- Induced Draft
- Centrifugal
- Propeller
- Pressure â€“ Enthalpy
- Mollier Diagrams
- P-h Diagrams
- Theoretical Analogy
- Entropy
- Net Refrigeration Effect
- CFM Calculation
- HP Calculations
- Mass Flow Rate Calculations
- Theoretical Discharge Temperatures
- Subcooling Effect
Psychrometrics
- Factors of psychrometrics
- Charts
- Interpretations
- Plotting
- Evaluations
Enthalpy
- Mollier
- Vaper Pressure Curves
- Regions of Enthalpy
- Factors of Enthalpy
- Plotting
  - Single Stage
  - Two Stage
  - Transcritical
- Interpretations
- Flash / Tax Gas
- Heat of Compression
- Single Stage
- Two Stage
- Theoretical Discharge Temperature
- Latent heat of evaporation / condensation
- CFM
- BHP
Advanced Understanding of Vessels
- Attributes
- Nameplates
- Accumulator
- Recirculators
- Control Pressure Receivers
- Surge Drums
- Intercoolers
- SubCoolers
- Oil Pots / Oil Stills
- Anhydrators
- Vessel in Vessels
Advanced Two – Stage Systems / Cascade Systems
- Simple 3 pressure two stage systems
- Multi pressured two stage systems
- Intercoolers
- Discharge
- Boosters
- Efficiency
- Compression Ratio of multi pressure systems
- Intermediate Pressure
- Theory
- Practical Operations
- Swing Compressors
- R-744 / CO2 Cascade Systems
  - Cascade Brine Systems
  - CO2 Cascade Compression
  - Industrial carbon dioxide refrigeration applications
  - Booster systems
  - Benefits and Advantages Compared to traditional two stage systems
- Horsepower Savings Two Stage and Cascade
- Compound Compression
Advanced Valve Understanding
- Isolation
- Flow Direction
- Service
- Strainers
- Solenoids
- Metering
- Expansion
- PTV
- TXV
- Modulation
- Automatic
- Groups / Clusters / Bodies
- Regulators
- 3-ways
- Level Controllers
Advanced DX Systems
- RR on DX
- CPR DX
- DX with Accumulators
- Sub-Cooled HPL Feed for DX
- Flash / Tax gas DX Systems
- Two Stage DX
- Flooded Shell DX Systems
- TXV with DX Systems
- Top Fed / Bottom Fed DX Systems
- Superheat Adjustments on DX Systems
- Orifices of Expansion Valves
- Automatic Liquid Feed Controls
- Hand Feed Controls
- TXV Feed Controls
  - Forces Involved in Opening / Closing
- Vessels
- Phase Seperation
- Troubleshooting Metering / Expansion valves
- Top Fed DX systems
- Bottom Fed DX systems
- Suction Line Accumulators
- Flash Gas / Tax Gas
- Distributers
- Super Heat Requirements
- Classifications of Superheat
- Bulb / Capillary / Power Head
- Mounting of Bulbs
- Internally Equalized TXVâ€™s / Externally Equalized TXVâ€™s
- Float Switches
- Level Controllers
- Gas Volume Temperature Comparisons
- Erratic DX Coils
- Slopover/ Burping/ Slugging/
- Advantages / Disadvantages
Advanced Flooded Systems
- Superheat measurements on Flooded Systems
- RR on Flooded
- Thermosyphon Action
- Partially Flooded
- Counter Flow / Parallel Flow
- Oil Drain on Flooded Systems
- Flooded Oil Pots
- Flash / Tax Gas Flooded Systems
- Feed Rates Flooded Systems
- Isolating Flooded Evaporators
- Heat Exchangers
  - Shell & Tube
  - Baffled Shell & Tub
  - Plate
  - Plate & Frame
  - Plate & Shell
- Secondary Coolants
- Term â€œWettedâ€
- Gravity Systems
- Thermosyphon Systems
- Surge Drums
- Surface Area Comparison
- Recirculation Ratio
- Oil Control
- Troubleshooting
- Partially Flooded Systems
- Requirements
- Superheat
- Flash Gas / Tax Gas
- Liquid Make Up
- Phase Separation
- Advantages / Disadvantages
Advanced Recirculated Systems
- Superheat measurements on Recirculated Systems
- Wetted / Wet Suction
- RR on Recirculated Systems
- Flash / Tag Gas on Recirculated Systems
- Overfeeding a Recirculated Systems
- LPRs
- Oil Management with Reciruculators
- Net Positive Suction Head
- Pump Cavitation
- Importance of Pump Head
- Priming pumps
- PSID
- Defrosting Pumps
- Pump Headers and Hydrostatic Conditions
- Startup of / Pump Slugs
- Thermostats
- Pressure Drop
- Feed Distribution Systems
- Pumps
  - Positive Displacement
  - Centrifugal
  - Sealed
  - Sealless
  - Mag-drive
- Dual Pumper Drums
- Top Fed
- Bottom Fed
- Oil Removal
- Advantages / Disadvantages
Advanced Secondary Coolants
- Secondary Coolants
- Advantages / Disadvantages
- Glycols
- Brines
- Calcium Chloride
- Sodium Chloride
- Propylene Glycol
- Ethylene Glycol
- Two Pipe Systems
- Three Pipe Systems
- Expansion Tanks
- Balance Tanks
- Defrost
- Pumps
- Heat Exchangers
  - Shell and Tube
  - Plate
  - Plate and Frame
- Eutectic Point
Advanced Defrost Methods
- Implications of 32 F
- Fin Spacing
- Defrosted Pans
- Air Defrost Steps and Applications
- Water Defrost Steps and Applications
- Glycol Defrost Steps and Applications
- HPL Defrost Steps and Applications
- Electric Defrost Steps and Applications
- Hot Gas Defrost Steps and Applications
- Pump down, Soft Start, Hot Gas, Bleed, Fan Delay, Cooling modes
- Cool Gas Defrost Steps and Applications
- 3 – Pipe defrosts
- 4 – Pipe defrosts
- DX systems and Gas Defrost Systms
- Flooded systems and Gas Defrost Systems
- Combining Units for Defrost
- Steps of Gas Defrost
- SOPs and Defrost
- Open Flames and Chipping Hammers
- Condensation Induced Hammer
- Consequences of Deviation of Defrost Practices