Ammonia Operator 2 is the next step of advanced technical training for the progressing ammonia operator. This class 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. This 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

Most successful students have at least two years industrial ammonia refrigeration experience. Aptitudes needed for success 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 whom 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. All ARTS certifications are active for a three window and carrier of those credentials must follow all company and regulator procedures.

The R-717 Operator 2 course entails a copy of the latest edition industrial ammonia refrigeration book hand selected by ARTS. 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
CRO / CIRO Screens
- Normal to Abnormal Troubleshooting
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
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
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 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
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
Advanced Recirculated Systems
- Superheat measurements on Recirculated Systems
- 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
- Pump Head
- Pump Valutes
- PSID
- Defrosting Pumps
- Pump Headers and Hydrostatic Conditions
- Pump Slugs
- Thermostats
- Pressure Drop
- Feed Distribution Systems
- Pumps
  - Positive Displacement
  - Centrifugal
  - Sealed
  - Sealless
  - Mag-drive
- Dual Pumper Drums
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
- 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
Cascade Systems
- CO2 Transcritical
- Cascade – Overfeed (Brine)
- Cascade – Compression
- Cascade Applications