GCAP’s Ammonia Operator II Competencies
Prerequisite: An “Approved” Ammonia Operator I Course
All of this material is covered or introduced to the student at our seminar. Most of this course is running hands on equipment in the lab. This selection of material will allow success in companies training structure and it follows the new IIAR Task Force Guidelines.
Course primary text will be GCAP’s “CRO: Certified Refrigeration Operator; an Advanced Understanding”
Ammonia Operator II
Index
Chapter 1 – Mechanical Integrity
Chapter 2 – Heat Transfer
Chapter 3 – Psychometrics
Chapter 4 – Enthalpy
Chapter 5 – Low Side Vessels
Chapter 6 – Low Side Valves
Chapter 7 – DX Systems
Chapter 8 – Flooded Systems
Chapter 9 – Recirculated Systems
Chapter 10 – Defrost Applications
Chapter 11 – Practice Test
Common Acronyms and Definitions
Quick Reference Formula Sheet
SAT Charts
Closing Thoughts
Detailed Studies in the following subjects with DX liquid feeds
- 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 TXV’s / Externally Equalized TXV’s
- Float Switches
- Level Controllers
- Gas Volume Temperature Comparisons
- Erratic DX Coils
- Slopover/ Burping/ Slugging/
- Advantages / Disadvantages
Detailed Annalist Liquid Feed to Flooded Evaporators
Topics:
- Term “Wetted”
- 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
Detailed Annalist Liquid Feed to Overfeed Evaporators
Topics:
- Term “Wetted”
- Liquid Recirculation
- Pumps
- Centrifugal
- Positive Displacement
- Shaft Seal
- Semi-Hermetic
- Hermetic
- Liquid Make Up
- Recirculation Ratios
- Single Pumper Drums
- Double Pumper Drums
- CRP Systems
- Top Fed Overfeed
- Bottom Fed Overfeed
- Pump Pressure
- Pressure Drop
- Two pipe adjustments
- Pump Sizing
- Oil Removal
- Advantages / Disadvantages
Detailed Annalist Secondary Coolants Systems
Topics:
- Secondary Coolants
- Advantages / Disadvantages
- Glycols
- Brines
- Calcium Chloride
- Sodium Chloride
- Propylene Glycol
- Ethylene Glycol
- Two Pipe Systems
- Three Pipe Systems
- Heat Exchangers
- Shell and Tube
- Plate
- Plate and Frame
- Eutectic Point
Detailed Annalist Heat Flow
Topics:
- Thermal Conductivity
- K Factor
- U Factor
- Theoretical Analogy
- Fouling
- CFM Calculation
- HP Calculations
- Mass Flow Rate Calculations
- Theoretical Discharge Temperatures
- Subcooling Effect
Detailed Annalist Two Stage Systems
Topics:
- 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
- CO2 Cascade Systems
- CO2 Cascade Brine
- CO2 Cascade Compression
- Application
- Benefits and Advantages Compared to traditional two stage systems
- Horsepower Savings Two Stage and Cascade
- NewTon 3000 Cascade System
- VFD’s
- Microprocessors
Detailed Annalist Defrost
Topics:
- Coil Defrost
- Moisture / Air Relationship
- Pump Down
- Fan Delay
- Soft Start
- Bleed
- Defrost Timings
- Pressure Equalization
- Air Defrost
- Water Defrost
- Electric Defrost
- Continuous Defrost
- Niagra Defrost
- Hot Gas Defrost
- Regulator Pressure
- Consequences of Deviation of Defrost Practices
Detailed Annalist Enthalpy/Mollier Diagrams
Detailed Annalist Psychometric Chart
Detailed CIRO Exam Supplemental Package
Topics:
- This packet is used in the Ammonia Operator II course for analytical troubleshooting.
- Area of rectangle / circle
- Volume of a room / cylinder
- 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 Figure of a Two Stage System
- Analyze Figure of Top Fed DX Evaporator
- Analyze Figure of Vessel and Piping
- Analyze Figure of Forced Draft Evaporative Condenser
- Analyze 3 way valve with reliefs
- Analyze Figure of a Pump Package
- Analyze an Electrical Schematic
- Analyze all 24 screens from normal to abnormal conditions
- Analyze MSDS Sheet for Ammonia
Garden City Ammonia Program
2405 E. Fulton Plaza
Garden City , KS 67846
620-271-0037
620-271-0484 FAX
ammonia@pld.com
www.AmmoniaTraining.com
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www.GcapCoolCast.com