Industrial

Training

Home
News
Products
Contractors
Hands-on Training Equipment
Links
Boiler Training
Ammonia Safety Equipment
Ammonia Operator Jobs
Training Specialist
Video
Experience
Car Rental
ON-SITE Registration
Operator I Register
Operator II Register
Operator III Register
Register PSM
Event Calendar
Contact Us
Scholarships
Reta Examination

 

Operator I Competencies  Email any questions Ammonia@pld.com            

 
Basic Refrigeration Cycle
  • Four Basic Components of refrigeration cycle
  • Break down the vapor and liquid lines
  • Difference between Sensible heat, Latent Heat, Specific Heat
  • Must understand the different states and steps in the refrigeration cycle
  • Explain the difference in heat and temperature
  • Explain the difference in PSIG and PSIA and pressure scales
  • Explain the difference between pressure and force
  • Vapor pressure curve in ammonia / saturation tables for ammonia
  • Use sensible heat and latent heat formulas to calculate refrigeration loads
  • Discuss the duties of a refrigerant operator / technician
  • Explain how heat is removed from an area
  • Explain how to identify pipe labeling with iiar standards
  • Must be able to use the terms: evaporating, condensing, discharge pressure, suction pressure, etc
  • Know the types of expansion devices
  • Know the difference in absorb heat and rejected heat
  • Know pressure drop of line

Refrigerant Properties

  • Saturation
  • Specific Volume of Refrigeration Vapor
  • Sub-Cooling
  • Superheat
  • Mass flow rate for ammonia
  • Handing Refrigerants
  • Hydrostatic Expansion of ammonia
  • Explain how to detect leaks in a ammonia system
  • Explain how refrigerant tables can help in analyzing system performance 

Refrigeration Compressor Types

  • Must be able to describe the function and types of compressors in refrigeration systems
  • Compression Ratio
  • Heat of Compression
  • Capacity controls on compressors
  • Understand the difference in booster compressor and high stage
  • Know the various operating limits of different compressors
  • Dynamic displacement compressor
  • Positive displacement compressor
  • Hermetically sealed compressor
  • Semi-hermetic compressor

Lubrication

  • Functions of lubricating oil in a refrigeration system
  • Understand the importance of, and dangers associated with draining oil
  • Describe the properties of refrigerate oils
  • Describe the purpose and functions of an oil separator
  • List and explain three types of indirect oil cooling systems
  • Identify major oil contaminants and describe contamination control in refrigerant oils
  • Explain three types of heat exchangers in lubrication

Cooling Units

  • Must understand difference in defrost cycle-hot gas defrost-air defrost, etc
  • Describe the operation of the evaporator
  • Describe the heat exchanger process for air and liquid cooling
  • Describe the reason and process for defrosting coils

Condensers and Receivers

  • Know the difference in wet bulb temperature vs. dry bulb temperature
  • Discuss high pressure receiver functions and types
  • Explain the three major types of condensers
  • Describe the purpose and function of the condenser
  • Describe the operational service & maintenance required of the condenser types
  • List advantages to the use of evaporative condensers over other condenser types
  • Describe the purpose and function of receivers

Purging

  • Non-condensable gasses
  • Explain the problems associated with non-condensable gasses
  • Discuss the source of non-condensable gasses
  • Various types of purgers and how they operate
  • Describe symptoms indicating air in an ammonia refrigeration systems