EN-3213 - Refrigeration

TOPIC - Introduction

• Understands the development and importance of refrigerations in the modern world.

TOPIC - Basic concept of refrigeration

• Performs basic unit conversions needed to work with standards set in the refrigeration field.
• Explains the basic concepts of refrigeration.

31A6.1.10

TOPIC - Refrigeration cycle and components

• Explains the detailed concepts of refrigeration theory.
• Identifies the major components of the refrigeration system and can discuss in detail each of these components.

31A6.1.10

TOPIC - Refrigerants and lubricants

• Explains the refrigerant families, new refrigerants, refrigerant safety, and compressor lubricants.
• Specifies refrigerants to meet design criteria.

TOPIC - Air conditioning theory

• Explains air conditioning theory including important terms.
• Identifies specific components used in air conditioning systems and explains the importance of air conditioning hygenics.

TOPIC - Operation and troubleshooting

• Understands proper operating parameters for various types of refrigeration systems, and the correct actions to take in the event of deviation.
• Knows proper watchstanding procedure with regard to operating refrigeration equipment.
• Discusses and identifies failures, operational problems and preventative maintenance of individual components.

31A6.1.9

TOPIC - Preview of the EPA regulations.

• Explains the development of the Clean Air Act and its impact on the refrigeration industry.

31D1.1

TOPIC - Leak detection

• Explains the following tasks; leak detection, system repair, use of vacuum pumps to evacuate and dehydrate systems, and charging.
• Identifies the different equipment needed for each of these operations.

TOPIC - Commercial and industrial refrigeration

• Identifies refrigeration systems typically used on large vessels and shoreside facilities, including:
  • lithium bromide
  • ammonia
  • cascade systems, etc.
• Explains components used in these systems including: chillers, evaporative condensers, cooling towers.

TOPIC - Refrigerants and the environment

• Discusses in detail the Clean Air Act of 1990 and pertinent knowledge required to pass the CFC Certification exam.

31D1.1

TOPIC - Recovery, recycling, reclaiming

• Explains the difference between recovery, recycling and reclaiming.
• Explains the correct methods of vapor recovery, liquid recovery, and where reusing refrigerants are allowed.

31D1.1

TOPIC - Refrigerant safety

• Explains the importance of refrigerant and refrigeration system safety.
• Defines regulations in place from major regulatory bodies including:
  • USCG
  • EPA
  • DOT

TOPIC - Certificates and record keeping

• Defines the requirements of each classification of certification as applied by the Clean Air Act, Section 608, 609.
• Explains the required record keeping which must be properly maintained to be in compliance with current federal laws.

31A4.3.1

LAB - Refrigeration System Components

• Identifies each component in a refrigeration system
• Identifies refrigerant lines
• Identifies refrigerant system nameplate data

31A6.1.9
31A6.1.10

LAB - Evacuation and Leak Detection

• Explains the basic operations of evacuating, charging and leak detection in refrigeration systems.
• Uses a gage manifold
• Uses a vacuum pump
• Checks system for refrigerant leaks using halide and electronic leak detectors

31A6.1.9
31A6.1.10

LAB - Refrigerant Properties

• Reviews important refrigerant properties such as saturation temperature, superheat, and subcooling
• Calculate refrigerant saturation temperatures at the high and low sides
• Measure actual temperature of refrigerant in liquid and suction line
• Calculate superheat and subcooling of the refrigerant
• Adjust TXV and repeat calculations.

31A6.1.10

LAB - Refrigerants

• Identifies refrigerant numbers and color codes.
• Determines operating characteristics using the pressure-enthalpy charts.
• Discusses the normal applications of the various refrigerants.
• Identifies the safety related aspects of the various refrigerants.

31A6.1.10

LAB - Refrigeration compressors

• Disassembles and reassembles reciprocating and rotary compressors

31A6.1.10
31A2.2.1

LAB - Gauge manifolds and service valves

• removes the charge of refrigerant from a system using a vapor recovery unit.
• evacuates a refrigeration unit.
• performs leak detection using a nitrogen charge.
• evacuates and teen charges the system as a liquid, followed up by a vapor charge.

31A6.1.10
31A2.2.1

LAB - Refrigerant recovery

• Demonstrates the correct procedure for recovering refrigerant from a system.
• Recharges and puts the system back into operation.
• Explains the necessity of keeping the refrigerants segregated and the limitations of reusing/disposal of used refrigerants.

31A6.1.10

LAB - Psychrometric Chart

• Uses the psychrometric chart to calculate heat gain or loss for an increase or decrease of room temperature.

31A6.1.10

LAB - Low side float systems

• Identifies and explains the different types of evaporator systems.
• Starts and operates a low side float refrigeration unit.
• Discusses the principles of operation of the system.

31A6.1.10

LAB - System controls

• Explains the operational difference between controls used in refrigeration systems and how they interact.
• Calculates cut-in, cut-out, and differential settings on refrigerant controls.
• Sets cut-in, cut-out, and differential settings.

31A6.1.10

LAB - Refrigerant Charging

• Performs a vapor charge of a system without running the risk of overcharge.
• Performs a liquid charge of a system without running the risk of overcharge.
• Fills a charging cylindar.

31A6.1.10

LAB - System startup

• Starts the domestic refrigeration system aboard the training vessel.

31A6.1.9