Using an approved simulator, in the laboratory, or aboard ship and given access to a refrigeration system that has been secured.

Performance requirement

Behavior Standard
The student will: During assessment, the student shall, at a minimum:

Identify the valves and equipment associated with the refrigeration unit


  • compressor suction valve
  • compressor discharge valve
  • cooling water supply
  • thermal expansion valve
  • solenoid valve

Check compressor lubrication

Verify visible oil level

Check refrigerant level

Verify visible receiver level

Line-up refrigeration unit

Line up cooling water supply

LIne up refrigerant circuit

Leave compressor suction valve closed

Start associated equipment

Energize box solenoids

Start diffuser fans, brine pumps, etc. as required

Start the refrigeration compressor

Gradually open compressor suction valve


  • circulation water is flowing
  • oil pressure rises upon starting
  • oil level remains visible

Operate the refrigeration unit until conditions stabilize


  • suction pressure
  • discharge pressure
  • box temperatures
  • operation of pressure switches


Assessed in EN‑3213 Refrigeration.


  1. Table A-III/1 OICEW-A4.1
  2. NVIC 17-14 Task 4.1.A

Note: Not all steps are possible on all refrigeration systems.

See the Assessment Guidelines for additional specifications of behavior and standards.