Practical Refrigeration Training Centre

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+44 (0) 1282 452152

Refrigeration, Air Conditioning and Electrical Training

  • Course Details
Course Duration: 2 day(s)

City and Guilds 2079 Category 1 or 2 with extra Theory


For experienced engineers who have the required practical skills but would like some extra theory training.

This course is not suitable for inexperienced engineers or apprentices or anyone requiring extra practical training.

PRTC is approved by city and Guilds to assess candidates for the City and Guilds 2079 (Categories 1 - 4) qualification. Holding a valid 'F Gas' qualification is mandatory for anyone handling F Gas refrigerants after July 2011.

Candidates will usually take category 1 (charging and recovering for systems with more than 3 kg of refrigerant in them) but category 2 (charging and recovering for systems with less than 3 kg of refrigerant in them) may also be taken. The dates are the same - please let us know which you would prefer when you book the course.

Anyone needing extra practical training should take the 3 day course


To achieve the skills and knowledge necessary to obtain the City and Guilds 2079 refrigerant handling qualification in the category specified.


On the first day a presentation/talk-through will be followed by training in specific topics as required by the candidates and practice in completing the paperwork needed.

The assessment day will comprise a practical test demonstrating the skills listed below and an 'on-line' multiple-choice question paper.


Theory - you will need to have an understanding of the following:

• Units of temperature, pressure, mass, density and enthalpy, including different states of refrigerant
• The basic theory of the vapour cycle and the use of pH diagrams
• The function of the major components, their performance and indications of leakage
• The operating conditions and efficiency of a system
• Azeotropic and non azeotropic refrigerants
• The GWP (global warming potential) of refrigerants
• Energy efficiency and ozone depletion, including the Montreal and Kyoto Protocols
• Identification of leakage points and the associated risks
• The legal requirements regarding the storage and transportation of refrigerants, oils and controlled wastes
• The documentation and records which need to be made and kept and how to complete them
• The hazards involved in handling refrigerants, oils and waste products
• The hazards involved in nitrogen pressure testing and flame brazing

Practical - you will need to demonstrate the following practical skills:

• Be able to braze and flare pipe
• Carry out and complete nitrogen pressure test
• Carry out and complete leak test direct and indirect
• Vacuum out system using vacuum gauge
• Prove system structure is sound and leak tight
• Charge system with non azeotropic refrigerants (over 3 kg for category 1)
• Prove system efficiency
• Produce commissioning document
• Complete a system log
• Recover refrigerant
• Drain oil from a compressor
• Produce waste documentation
• Ensure refrigerant traceability