Practical Refrigeration Training Centre

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+44 (0) 1282 452152

Refrigeration, Air Conditioning and Electrical Training

Course Duration: 1 day(s)

City and Guilds 2079 Category 1 or 2 Assessment Only


For very experienced engineers who require an Assessment Only - no extra training will be given.

This course is not suitable for inexperienced engineers or apprentices or anyone who is unsure of any of the topics described below.

PRTC is approved by City and Guilds to assess candidates for the City and Guilds 2079 category 1 (for systems with more than 3 kg of refrigerant in them) or category 2 (for systems with less than 3 kg of refrigerant in them). The dates and costs are identical for either category but please let us know which you would prefer at the time of booking.

Holding a valid 'F Gas' qualification is mandatory for anyone handling refrigerants after July 2011.


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


The assessment comprises a practical test demonstrating the skills listed below and an 'on-line' multiple-choice theory 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