F-Gas Category I case studies
F-Gas Category I · Put your knowledge to work in context.
The F-Gas Category I exam is the highest of the four F-Gas qualification categories in the UK, and is the one required for engineers who work on systems containing 5 tonnes CO2e or more of fluorinated greenhouse gases - including installation, commissioning, servicing, leak checking, recovery and decommissioning. It is aimed at refrigeration, air conditioning and heat pump engineers who already hold a Category II level of competence or equivalent experience, and who need the legal certification required to work unsupervised on larger systems. The F-Gas Category I case studies are 5 cases and about 2,042 words.
1Split System Retrofit After a Compressor Burnout
You attend a 12 kW R-410A split system in a small office. The compressor has failed with a winding burnout; the service record shows the system had a slow leak for two seasons and was topped up twice without a leak being located.
507 words, about 3 min2Choosing the Right Recovery Cylinder for a Mixed Charge
You are clearing a plant room containing three systems. System A holds R-134a.
404 words, about 2 min3Leak Check Interval Dispute on a Retrofitted Chiller
A building manager tells you their chiller 'doesn't need leak checks because it's under 5 tonnes of CO2 equivalent'. You inspect the label: the chiller contains 95 kg of R-134a (GWP 1430).
355 words, about 2 min4Cylinder Overfill and Transport Decision
At the end of a busy day you have recovered R-410A from two systems into a 20 kg recovery cylinder. The cylinder's tare weight is 14.2 kg and its gross/water capacity marking gives a maximum fill.
360 words, about 2 min5Commissioning a New System With a Suspect Vacuum
You are commissioning a new 8 kW R-32 split system with a 15 m pipe run. After pressure-testing with OFN at the required test pressure and finding no decay, you evacuate with a two-stage pump and a micron gauge at the pump, not at the system.
416 words, about 2 min