TRAINING


different ignition and burning characteristics to refrigerants such as hydrocarbons. It makes sense to cover the safe handling of A2L refrigerants alongside hydrocarbons, because the guidance is the same. There is no reason to consider A2Ls differently. Although they fall into a lower flammability class, they can be ignited and so should be handled using the same practical precautions as with HCs.


The main impact of lower flammability is that larger charge sizes can be used compared to HC


refrigerants. Charge size can be further increased by the use of construction requirements and the risk mitigation methods mentioned above. It is important that engineers understand what these requirements and methods are, to avoid A2Ls being applied inappropriately.


Summary


Training is essential for technicians working on flammable refrigerant systems, and for engineers specifying the refrigerants and designing systems.


In conclusion, the basic practices are the same as when we first started providing HC training over 20 years ago. However, the flammable refrigerant range has expanded and flammable refrigerants are used in a much wider variety of equipment.


As a business, we have seen a steady increase in the uptake of flammable refrigerant training in line with industry developments, and scope of the training has widened as industry has evolved and continues to do so.


www.acr-news.com August 2018 49


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72