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Summary This section covers the relevant safety issues necessary for working with refrigerants. There is a general description of the safety implications of refrigerants, including toxicity, oxygen displacement, flammability, degradation products, and high pressure to highlight the major hazards. It includes a summary of the important safety procedures, such as personal protection, ensuring a safe working area, working on a system safety, and how to handle refrigerant cylinders appropriately. Primarily aimed at the use of hydrocarbon (HC) refrigerants, there is also a section detailing the special requirements for working with flammable refrigerants, and further guidelines specific to the use of ammonia (NH3, R717). Upon completion, the technician should be able to identify safety procedures for handling refrigerants and servicing installations. 6 6.1. Overview of refrigerant safety The use, storage and handling of all refrigerants present safety hazards. These hazards may be related to a number of aspects, in that they may: • be stored at high pressure • displace oxygen when released in air • have toxicological effects • be flammable • have dangerous decomposition products. At least one of these characteristics applies to any refrigerant, and for that reason, a variety of precautions must be followed to ensure against injury to persons and damage to property. Thus, safety begins with observing basic precautions and following simple procedures. Before using or handling any refrigerant, personnel should be familiar with the characteristics of the specific substance, reading all relevant information, which is always available from the supplier and manufacturer. It is also important to understand that safety hazards equally apply to other materials used with refrigerating systems. These include refrigeration oils, nitrogen, cleaning agents and oxy-acetylene for brazing. Whenever handling hazardous substances, a risk assessment should be carried out, in order to determine what the potential risks Safe Refrigerant HandlingPDF Image | Manual for Refrigeration Servicing Technicians
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