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Audi A8 type 4N New air conditioning features and introduction of refrigerant R744 Self Study Programme 665 For internal use only. Audi Service Training Back Forward Ξ Contents „arbon dio…ide is used for the ifrst time as an au…iliary refrigerant in the new Audi A8 type 4N  ‡t has different physical properties to the other refrigerants in use, eg it is nonlfammable, colourless and odourless The refrigerant circuit continues to operate at much higher pressu res The components of the refrigerant circuit, such as the com pressor and gas cooler, hae adapted functions The new Audi A8 type 4N also offers new incar air  uality fea tures, such as a cabin fragrance system with selectable fragrances and an air improement system 665 002 Learning objectives of this self study programme This self study programme describes the new features of the air €ow is the air conditioning system conifgured for use of the conditioning system in the Audi A8 type 4N , as well as the design new 44 refrigerant‚ and function of the air conditioning system iflled with the new ƒhat are the points to note when sericing the cabin fragrance 44 refrigerant introduced in this model nce you hae comple system function unit‚ ted this self study programme you will be able to answer  uestions ƒhat are the new display and control features of the air condi on the following topics­ tioning system‚ ƒhat new massage functions are aailable in the new Audi A8‚ 2 Contents Introduction ‡ntroduction of the new 44 refrigerant ŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽ 4 ‘lobal ƒarming ’otential ŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽ “ Design of the R744 air conditioning system ”chematic diagram and function description ŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽŽ