Abstract: When, according to the invention, the air in the so-called Zone 2 areas is ventilated, i.e. sucked out, the ATEX Directive concerning treatment of inflammable coolants may be satisfied in an effective manner. In practice, the suction around the engine (6) of the vehicle and the ventilation of the service equipment (9, 21, 53), respectively, may ensure that the requirements in the ATEX Directive with respect to Zone 2 areas may be satisfied, if possibly inflammable vapors are discharged, since these areas are ventilated to the atmosphere. The use of the method is service-friendly when servicing air conditioning systems and when adding coolant online.

Abstract: When, according to the invention, the air in the so-called Zone 2 areas is ventilated, i.e. sucked out, the ATEX Directive concerning treatment of inflammable coolants may be satisfied in an effective manner. In practice, the suction around the engine (6) of the vehicle and the ventilation of the service equipment (9, 21, 53), respectively, may ensure that the requirements in the ATEX Directive with respect to Zone 2 areas may be satisfied, if possibly inflammable vapours are discharged, since these areas are ventilated to the atmosphere. The use of the method is service-friendly when servicing air conditioning systems and when adding coolant online.

Abstract: In a method for servicing an air conditioning system of a motor vehicle, surrounding areas in which there is a risk of leakage of inflammable coolant is ventilated such that air in the surrounding areas is suctioned out and discharged from the surrounding areas.

Abstract: In a method for servicing an air conditioning system of a motor vehicle, surrounding areas in which there is a risk of leakage of inflammable coolant is ventilated such that air in the surrounding areas is suctioned out and discharged from the surrounding areas.

Abstract: A valve unit for the evacuation and filling of media, especially liquids, in a system comprising a valve housing (4), at least two valve seats (15), in one of said valve seats there being housed a valve part for evacuation, and in the second of said valve seats there being housed a valve part for filling. The valve part (5) comprises a longitudinal channel (1) and at least two communication holes (3) extending from the longitudinal channel (1) to the valve part's outer surface (20), said channel (1) being provided with a through-flow cut-off (14) which divides the channel into two part channels, a first part-channel (16) and a second part-channel (17), said part-channels (16, 17) each comprising a communication hole (3), and a slide (6) disposed around the valve part (5), said slide (6) having at least one recess (18) on the surface (21) facing towards the valve part (5) and forming at least one closed cavity, said slide (6) being activated by the feeding of a gas or liquid medium to the valve seating.