AC–2 AIR CONDITIONING SYSTEM – GENERAL DESCRIPTION Ultraviolet Rays Ozone Layer Depletion CFCs N04157 GENERAL DESCRIPTION NEW AIR CONDITIONING SYSTEM WITH HFC134a Refrigerant CFC 12 (R 12), previously used in automobiles' air conditioning systems is believed to contribute towards the depletion the earth's ozone layer. The ozone layer help to protect us against the harmful ultraviolet rays of the sun. R134a TOYOTA 200g N04154 A newly developed refrigerant, HFC 134a (R 134 a), does not the destroy the ozone layer. R134a → HFC 134a A/C SYSTEM TROUBLE R12 → CFC12 A/C SYSTEM N04323 Z13854 PRECAUTIONS FOR SERVICING HFC134a AIR CONDITIONINGS 1. USE OF NEW REFRIGERANT HFC134a The very different characteristics of refrigerants HFC134a and CFC12 have determined the design of their respective air conditioning systems. Under no circumstances allow CFC12 to enter an HFC134a system, or vice versa, because serious damage could occur. R134a CAR AIRCONDITIONER COMPRESSOR OIL ND-OIL 8 N04156 2. USE OF PROPER COMPRESSOR OIL Compressor oil used in conventional CFC12 air conditioning systems cannot be used in HFC134a air conditioning systems. Always use genuine Toyota R134a air conditioning oil ND–OIL 8, made expressly for use with HFC134a. NOTICE: Compressor oil (ND–OIL 8) for HFC134a use adversely affects acrylic resin, so take care not to spill or spray any compressor oil. N04158 If even a small amount of the wrong oil is changed, it will result in clouding of the refrigerant. A large amount will cause the compressor to seize up.