Mazda CT-L1005, Руководство по обучению

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Basic Climate Control A/C System
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To remove the moisture from the system a desiccant is incorporated into the receiver /
drier. The desiccant is a chemical substance that absorbs moisture, but cannot release
it. The amount of water that the desiccant can absorb is relatively tiny, since it is
primarily there to absorb the unavoidable moisture that enters the system during
manufacturing.
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If the system is opened to the atmosphere for an extended period of time (more than 3
hours), the desiccant will be saturated and the surplus moisture will cause the PAG oil to
break down. Any water not able to be trapped by the desiccant can also mix with the
refrigerant, creating a corrosive acid. The process of moisture absorption is a one-way
process; during the evacuation process with the A/C service machine none of the
trapped moisture will be removed from the desiccant. When the desiccant is saturated,
the receiver / drier will need to be replaced.
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For practical purposes, this means that when replacing components on the system make
sure that the system is sealed to avoid the desiccant being saturated with moisture.
Curriculum Training 03-13