| When working with the service stations (e.g. air-conditioner service station - 4006D-), the following must be taken into account: |
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| The installed filters and desiccants must be replaced at the latest when the service time stated in the respective instructions manual is reached. |
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| Only refrigerant oils authorized for the specific refrigerant circuit of the vehicle must be used. |
| Under the following circumstance, the refrigerant sucked out must not be reused in the station, even after it has been purified. |
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| If the compressor was damaged, leading to the refrigerant decomposing due to overheating. |
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| If there are dark and sticky sediments in the refrigerant circuit (which can only be detected after opening the installation). |
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| If there is any doubt about the composition of the refrigerant extracted from the refrigerant circuit. |
| In such cases it is always necessary to empty the service station. If necessary, clean system and replace filter and dryer as well as refrigeration oil. |
| The contaminated refrigerant can be stored in so-called recycling bottles for processing or correct disposal and sent back the refrigerant supplier (see the country specific legal guidelines, different or extended standards are possible). |
| Commercially available service stations can be classified into two groups: |
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| A. Service stations which purify the extracted refrigerant for reuse (the so-called suction and recycling stations), e.g. the air-conditioner service station -SAT 4006D-. |
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| B. Service stations which extract the extracted refrigerant and deposit it into recycling bottles (to be treated at large scale at specialized plants). These installations are known as suction systems. |
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