- Do not pull or lift system components by hoses, pipes or capillary tubes.
- Hoses and pipelines must not be subjected to small radius bends and mechanical stress; the cooling capacity of the system will be reduced if there are nodes or any additional resistance. Before tightening the nuts, make sure that the hoses are positioned correctly, the components must be secured with all the provided fastening elements.
- Flexible hoses should not be located in close proximity to the outlet pipe (closer than 100 mm) in the absence of special heat shields.
- After installation, make sure that the refrigerant pipes do not touch the metal panels. Any direct contact of components with the panels may cause noise and must be eliminated.
- A special torque wrench should be used to tighten the pipeline connecting nuts. An additional wrench should be used to hold the pipeline or unit from turning while tightening the nuts.
- Before connecting a hose or pipeline, lubricate the seats for the sealing rings with special oil, DO NOT LUBRICATE the connection threads.
- The safety plugs should only be removed before the components are actually connected.
- Before disconnecting the pipes, let the car stand until its temperature equalizes with the box temperature. This will prevent condensation of water vapor from the air that gets into the system when unscrewing the pipes.
- Do not leave unplugged openings for more than 15 minutes. If reassembly of the system is not possible within this time, plugs should be installed.
- After removing the pipes, their ends should be immediately plugged to prevent dirt and moisture from entering the system.
- The receiver and dryer assembly contains a desiccant that absorbs moisture. It must be sealed at all times. A receiver and dryer assembly left unsealed should be replaced with a new one.
- The receiver assembly with the dehydrator should be connected to the system last. This will ensure maximum protection of the system from moisture.
- In all cases where any components of the air conditioning system are removed, the receiver assembly with the dryer should be immediately replaced before the system is drained and filled.
- To clean dirty connections, use a lint-free cloth dampened with alcohol.
- Components used for repairs must be labelled for use with R134a refrigerant.
After a major overhaul of the system, it is necessary to perform a pressure test. How to do this is described in the "Air Conditioning System" section of this Manual.
Special oil used in air conditioning systems
Use only recommended ND Oil 8 oil in your air conditioning system.
CAUTION: Do not add other types of oil to the air conditioning system.
CAUTION: The special oil used in the air conditioning system is very hygroscopic. It cannot be stored for a long time. It is prohibited to drain unused oil back into the container.
When upgrading system components, add the required amount of oil as recommended in the Air Conditioning System section of this manual.
Compressor
New compressors supplied as spare parts are hermetically sealed and filled with nitrogen. When installing a new compressor, carefully unscrew the sealing plug. At this time, you should hear the noise of escaping gas.
CAUTION: New compressors supplied as spare parts must be sealed and may be filled with nitrogen. To avoid lubricating oil emissions, remove the sealing plugs slowly and carefully. Remove the sealing plugs immediately before installing the compressor on the vehicle.
Rapid leakage of refrigerant due to an accident or breakdown
If the air conditioning system is depressurized as a result of an accident, the refrigerant will evaporate completely. This happens spontaneously within a very short time. As a result, most of the lubricating oil is carried away along with the refrigerant. In this case, the compressor should be removed and all the oil drained from it. Then refill the system with oil as described in the "Air Conditioning System" section of this Manual.
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