- Do not pull or lift system components by hoses, piping, or capillary tubes.
- Hoses and pipelines should not be subjected to small radius bends and mechanical stresses; the cooling capacity of the system in the presence of nodes or any additional resistances will be reduced. Before tightening the nuts, make sure that the hoses are correctly positioned, the components must be secured with all the provided fasteners.
- Flexible hoses must not be located in close proximity to the exhaust pipe (closer than 100 mm) in the absence of special thermal screens.
- After installation, make sure that the refrigerant piping does not touch the metal panels. Any direct contact between components and panels can cause noise and must be eliminated.
- Use a special torque wrench to tighten the connecting nuts of the pipelines. An additional wrench should be used to hold the piping or unit from turning while tightening the nuts.
- Before connecting a hose or pipeline, lubricate the O-ring seats with special oil, DO NOT LUBRICATE the connection threads.
- The safety plugs should only be removed before connecting the components directly.
- Before disconnecting the pipelines, hold the car until its temperature equals the temperature of the box. This will prevent the condensation of water vapor from the air that enters the system when the pipelines are turned off.
- Openings must not be left unplugged for more than 15 minutes. If reassembly of the system is not possible within this time, plugs should be installed.
- After removing the pipelines, immediately plug their ends to prevent dirt and moisture from entering the system.
- The receiver and drier assembly contain a desiccant that absorbs moisture. It must be kept hermetically sealed at all times. A dryer receiver assembly left unplugged must be replaced with a new one.
- The receiver and dryer assembly should be connected to the system last. This will ensure maximum protection of the system from moisture.
- In all cases, when removing any components of the air conditioning system, the receiver and dryer assembly should be replaced immediately before the system is drained and filled.
- Use a lint-free cloth dampened with alcohol to clean dirty connections.
- Components used for repair must be marked for use with R134a refrigerant.
After a major overhaul of the system, it is necessary to carry out pressure testing. How to do this is described in the section "Air conditioning system" this guide.
Special oil used in the air conditioning system
Use only the recommended ND Oil 8 in the A/C 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. Do not pour unused oil back into the container.
When updating system components, add the required amount of oil as recommended in section "Air conditioning system" this guide.
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 sound of escaping gas.
ATTENTION: New compressors supplied as spare parts must be hermetically sealed and can be filled with nitrogen. Remove sealing plugs slowly and carefully to avoid lube oil spills. Remove the sealing plugs immediately before installing the compressor on the vehicle.
Rapid refrigerant leakage due to an accident or breakdown
If the air conditioning system is depressurized as a result of an accident, the refrigerant evaporates completely. It happens spontaneously within a very short time. As a result, most of the lubricating oil is carried away with the refrigerant. In this case, remove the compressor and drain all the oil from it. Then refill the system with oil as described in section "Air conditioning system" this guide.
Comments on this article