Daewoo Nexia

since 1994 of release

Repair and car operation

Deu Neksiya
+ Maintenance instruction
+ Maintenance
+ Engine
+ 3. Engine (two top camshafts)
+ cooling System
+ Toplevnaya and exhaust systems
+ Electric chain
+ 7. Ignition system
+ 8. Electronic control unit and sensors
+ Transmission
+ 10. Five-speed transmission and main RPO MM5 broadcast
+ 11. Automatic Transmission
+ Steering
+ Running gear
+ 14. Forward suspension bracket
+ 15. Drive of forward wheels
+ 16. Back suspension bracket
+ Brake system
+ Body
- Heating, ventilation
   19.2. Air central air
   19.3. Diagnostics of malfunctions
   19.4. Features of the conditioner
   19.5. Work of central air of air
   + 19.6. Management of air central air
   19.7. Relay and switches
   + 19.8. Diagnostics of malfunctions
   - 19.9. Maintenance
      19.9.1. Replacement of sealing rings
      19.9.2. Corrected addresses with a coolant
      19.9.3. Rules of installation of connections of pipelines
      19.9.4. Ensuring chemical purity of a coolant and refrigerating oil
      19.9.5. A discharge, having added oils, air pumping, the KV system charging a coolant
      19.9.6. Filter-vlagopoglotitelya installation
      19.9.7. Receiver maintenance
   + 19.10. Removal and installation of knots of central air of air
   19.11. The V-5 compressor – the work description
+ Electric equipment


19.9.4. Ensuring chemical purity of a coolant and refrigerating oil


Effective work and durability of KB system depend on purity of a coolant.

At hit in KB system of extraneous substances (moisture, dirt, air) breaks ся stability of properties of a coolant and refrigerating oil. The temperature of boiling and coolant condensation that affects system effectiveness of KB changes, there is possible a corrosion of internal cavities of units and system pipelines, wear of details is accelerated. For ensuring chemical purity of a coolant in use KV systems it is necessary to observe the following general rules.

1. Before dismantling of connections of KB system it is necessary to clear carefully them of dirt and oil to prevent system pollution. Right after a detachment of the pipeline it is necessary to put on protective caps the union and the pipeline or to screw jams.

2. The tool should be kept clean in a dry place. This requirement belongs also to a collector of control manometers and spare parts

3 At доливе refrigerating oil of brand 525 or PAG, applied according to coolants R-12 and R-134a, it is necessary to use only pure and dry capacities and hoses that in the greatest possible degree to reduce moisture hit in oil.

4. At partial dismantling of KB system or dismantle of any unit of system it is necessary to prepare in advance everything bypass my tools and details to reduce to a minimum time of depressurization of Quarter system. It is forbidden to leave KB system open further, than it is necessary for repair and техобслу chewing.

5. Each time after depressurization of KB system is necessary for pumping out carefully from it air before filling by a coolant. All spare parts for KB system are exposed to drying and are tightly condensed or packed. Spare parts should be stored in an original packing and be unpacked only before the installation. Before removal of packing and caps spare parts should have air temperature in order to avoid moisture condensation on them. If for any reason the spare part is unpacked and opened, but not established in KB system, it is necessary to establish urgently into place removed tight caps and to pack a product.