Daewoo Nexia

since 1994 of release

Repair and car operation

It is necessary to work in well airing megohm a room and to avoid coolant steam inhalation. Hit in eyes of a liquid coolant can lead to a travmirovaniye.

1) Before removal and replacement of any element of KB system it is necessary precede telno completely to discharge system from a coolant.

2) When pumping air and a system charging a coolant it is necessary to use a set of cranes and manometers.

3) A system discharge, pumping of air and a system charging the coolant authorizes to make only through technologists the chesky union located in a contour of low pressure.

4) At a discharge and a charging of KB system it is forbidden to attach pipelines of a high pressure and other pipelines to the technological union located in a contour of a high pressure.

It is forbidden to disconnect a manometer hose from the transitional union when the pipeline is connected to Quarter system. At a detachment трубопро water it is necessary to turn out an adapter from the technological union. It is forbidden to disconnect a charging hose from the block of manometers if it is connected to the technological union in a contour of low pressure. It will lead to a full discharge of system via the open valve of the technological union and to a possible travmirovaniye of the personnel because of leakage of a coolant.

1) At the switched-off ignition to remove a protective cap from the technological union of a contour of low pressure. The union is located on the receiver case. To connect to the union charging station or a collector of manometers. The discharge of system can be made also by means of a manometer and capacity hose with refrigerating oil, see fig. A KB system discharge without use of charging station. One end of a hose is located in capacity, and another is slowly connected to the technological union on the receiver case. At connection of a hose the locking valve of the union opens and the Quarter system discharge begins. If the discharge does not occur, it is necessary to check serviceability of a pusher in a tip of a hose which opens the valve.

2) After a full discharge of a contour of low pressure to check existence остаточ a pressure foot in a contour of a high pressure (via the union of this contour).

3) If there is a residual pressure, to discharge a contour of a high pressure, operating similarly. (Residual pressure testifies to existence of resistance in a contour of a high pressure. To find and eliminate malfunction before pumping out air and to fill system).

4) After a full discharge of system (gas does not leave any more a hose at completely navernuty tip) to measure and write down amount of collected refrigerating oil. If more than 15 ml of oil were gained, in system it is necessary to add the same amount of fresh refrigerating oil of brand 525. Besides, it is necessary to add so much oil, how many remained in the removed unit. Having added make before pumping of air and a system charging a coolant.

Having added oils

Having added refrigerating oil it is made after a discharge of system of CB and before air pumping from it. For this purpose it is necessary to disconnect soaking-up pipeline from the target union of a receiver, to pour in the necessary amount of fresh oil in the pipeline or the union and to attach the pipeline into place properly.

The content of refrigerating oil in KB system units

The refueling capacity of KB system with the V-5 compressor makes 240 ml of refrigerating oil. At system work on coolant R-12 brand 525 oil is applied, and at work on coolant R-134a - PAG oil.

At replacement of units of KB system it is necessary to add in system oil in the following quantities:

а) The compressor – if less than 30 ml of oil are merged, to add 60 ml. If more than 30 ml are merged, to add the same amount of oil. Receptions correct oil plum from the compressor are given below.

б) The evaporator – to add 90 ml of oil.

в) The condenser – to add 30 ml of oil.

г) A receiver – to pour in in a new receiver of 105 ml of oil.

д) Oil losses because of considerable leakages of a coolant.

1) If there was a fast pressure drop in KB system, together with хладаген the volume is lost about 90 ml of oil. Any malfunctions connected with a fast discharge of system are accompanied by similar losses of oil. Ny leakages of a coolant do not lead Neznachitel to oil losses.

2) At the replacement of any unit connected with big losses of a coolant to add in system of 90 ml of refrigerating oil. At system work on coolant R-12 brand 525 oil is applied, and at work on coolant R-134a – PAG oil. In addition to add in system oil in quantity which depends on the replaced unit, see above points and) - д).

3) To add oil follows directly in the established unit. If it is inconvenient, oil add in a receiver.

Pumping of air and KB system charging

If KB systems it was partially disassembled for repair and servicing or there was a leakage of a coolant, before a charging of system it is necessary precede telno to pump out from it air. Pumping of air and a charging a coolant are interconnected, therefore pipelines of manometers should be washed out before the beginning of work as a coolant. Pumping of air and a charging of system can be made by two methods:

1) by means of charging station;

2) by means of capacity with a coolant.

Under no circumstances it is impossible to use alcohol for Quarter system drainage. It will lead to failure of details of system.

1) To uncover a manometer.

2) Holding a hand the adjusting screw of an arrow, carefully to turn an arrow on zero. Slightly to knock on the device and to be convinced that the arrow does not jam. To establish into place a cover.

Check of vacuum system

Before connection of the vacuum pump to KB system it is necessary to check its working capacity. For this purpose to attach to the vacuum pump a manometer and to turn on the pump. If the pump is not provided by a razryazheniya 711... 737 mm Hg, are necessary to check system on existence of the leaky sty. If the system is tight, the vacuum pump needs under repair.

Coolant charging by means of charging station

1) Not to attach the pipeline of a high pressure to Quarter system.

2) The valve of a high pressure of charging station should be always closed.

3) All operations on pumping of air and a charging of a coolant to make via the technological union of a receiver.

4) Observance of these instructions will help to prevent casual connection of a contour of a high pressure of KB system with filling station in case of a mistake as opening of valves at the working compressor.

Coolant charging from capacity

KB system charging a coolant from capacity


1) To attach a collector of manometers (J 23575-01 adaptation) as follows.

and. To attach a vacuum manometer to the receiver union.

B. The central union of a collector to connect to capacity with a coolant

century. To attach a manometer of a high pressure to the vacuum pump.

2) For air pumping from KB system slowly to open valves of high and low pressure (see fig. The KB system charging a coolant from capacity) and to turn on the vacuum pump. To continue to pump out air before achievement of a razryazheniye 711... 737 mm Hg on a vacuum manometer. It should be noted that everywhere at the description of operation of pumping of air value of a razryazheniye 711 is given... 737 mm Hg. This razryazheniye corresponds to conditions at a sea level. If necessary it is necessary to enter the amendment reducing a nominal razryazheniye by 25 mm Hg on each 300 m of lifting above sea level. For example, at height of 1500 m above sea level the nominal razryazheniye is equal 584... 610 mm Hg. If the demanded nominal razryazheniye is not reached, it is necessary to close the vacuum valve, to switch off the vacuum pump and to check connections and the pump on tightness.

3) At achievement of a demanded razryazheniye in KB system to close the valve of a high pressure and to switch off the vacuum pump.

4) On a vacuum manometer to check tightness of system. Razryazheniye should be stable within 5 minutes. If systems it is tight, to disconnect a vacuum hose from a collector and to start a KB system charging a coolant.

5) If the razryazheniye does not keep within 5 minutes, to fill in KB system of 420 ml of a coolant and to check it on existence of leaks. Then to discharge system and to eliminate thinnesses. To repeat operation of pumping of air.

KB system charging coolant

1) To start the Engine and to switch off the Quarter system button.

2) To overturn capacity and to establish it on scales. To open the final crane of capacity. To merge 480 ml of a coolant in KB system via the union of a contour of low pressure.

3) After plum of 480 ml of a coolant at once to turn on the compressor and the maximum supply of air by the supercharger for implementation of complete filling of system by a coolant. Operation of a charging can be accelerated by means of the fan of big productivity blowing in the condenser. If to maintain temperature of the condenser at lower level in comparison with capacity, the charging will pass quicker.

4) To close the drain crane of capacity and let's work to the engine during 30 with for cleaning of pipelines and tubes of manometers of a coolant.

5) At the working engine to disconnect a refueling hose with an adapter from the receiver union. A detachment to make quickly in order to avoid coolant losses from system.

It is forbidden to disconnect a manometer hose from an adapter if the pipeline is connected to Quarter system. It is necessary to turn out at first an adapter from the technological union of a receiver. It is not necessary to disconnect also заправочподключен to a receiver. It will lead to a full discharge of KB system via the return valve of the union of a receiver and to a possible travmirovaniye of the personnel in leaving pairs of coolant.

7) To switch off the Engine.

8) to Check tightness of KB system by means of an electronic tester.

9) To start the Engine.

10) To check Quarter system work.