VOLKSWAGEN GOLF IV

since 1997 of release

Repair and car operation



Foltsvagen Golf 4
+ 1. Maintenance instruction
+ 2. Engine
+ 3. Cooling system
+ 4. Fuel system
+ 5. Exhaust system
- 6. Ventilation and heating system
   6.1. Removal and installation snuffled supply of air
   6.2. Installation of the lever of the central zaslonka
   6.3. Removal and installation of the fan of a heater and additional resistor
   6.4. Removal and installation of cables of management by heating and ventilation system
   + 6.5. Zaslonka regulating temperature of air submitted to salon
   6.6. Removal and control unit installation by a heater
   6.7. Ventilation of salon of the car
   6.8. Executive engine of the valve of a retsirkulyatsiya of air
   6.9. Air central air
   6.10. Arms of the compressor of the conditioner
+ 7. Coupling
+ 8. Transmission
+ 9. Suspension brackets and power shafts
+ 10. Steering
+ 11. Wheels and tires
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment and electroschemes






6.9. Air central air

GENERAL INFORMATION

Scheme of central air of air

1–compressor;
2–sensor of speed of rotation of the compressor of the conditioner;
3–electromagnetic coupling;
4–masloslivny stopper;
5–valve of superfluous pressure;
6–connection with the valve;
7–the push-button switch for the conditioner and the electromagnetic coupling;
8–cap;
9–service connection;
10-condenser;
11-pipeline connection;
12-throttle;
13-evaporator;
14-the push-button switch for a cooling contour;
15-valve connection;
16-capacity;
HD – the party with a high pressure;
ND – the party with low pressure

Central air deletes excessive heat and moisture from salon according to the basic physical principles. The coolant circulating in the form of liquid in that part of system where the high pressure is supported, evaporates and turns into gas on a site of low pressure. At expansion of gas there is a cooling, being accompanied heat selection from the air submitted by the fan to passenger salon and fall of its temperature. Further in process of passing via the condenser the coolant gives absorbed heat to air. The cycle of selection of heat proceeds infinitely long in process of coolant circulation on the closed contour. From the air submitted to salon, there is a moisture removal owing to condensation on the evaporator of the refrigerating chamber.

Central air of air represents potential danger. At its service observance of certain rules is required. Performance of the majority of operations on repair and service of central air needs the special equipment and certain skills of work.

Ventilation of a body is provided with a way of formation of a through stream of air. Fresh air gets in the car through an air inlet located before a windscreen. The stream of air comes to light via the final channels located on each side of a body about back shock-absorbers.

The size of a stream of air is regulated by the four-high-speed fan.

The system of heating of air of the mixed type is intended for fast response to change of air temperature in salon and reduction of a pulsation of temperature of warmed-up air. Cooling liquid of system of cooling of the engine constantly circulates in a radiator of a heater and the stream of cooling liquid is not regulated. An adjustable factor is air temperature which changes the mixing zaslonka defining amount of air, a heater passing through a radiator before its hit in car salon.

For a hit exception in salon of the car of fresh air there is a mode of a retsirkulyatsiya of air.

Precautionary measures at service of central air of air


Central air refuels a coolant "R12 Freon", and details of system are under working pressure over 300 atmospheres. A source of the increased danger at improper maintenance of system by unprepared technicians and when using the inadequate equipment is the high pressure and chemical influence of a coolant.

The automobile coolant "R12 Freon" possesses dangerous impact on environment. For protection of environment the Volkswagen firm orders to use at central air depressurization the equipment on utilization and the processing, supplied with the certificate of insurance laboratory (UL).
Prevention

Central air should be served by exclusively prepared technicians trained in safe working methods with use of the appropriate equipment with observance of rules of depressurization, acquainted with receptions of collecting and order of storage of an automobile coolant.

Do not allow coolant contact by skin.

At work near central air put on goggles.

At coolant hit on skin or eyes do not pound the struck place. Immediately wash out cold water within not less than 15 minutes. Immediately address to the doctor or in medical institution. Self-treatment is not allowed.

The coolant is stored in a new cylinder under pressure. Store a cylinder at temperature not above 50 ° S.Prinimayte the measures excluding falling of a cylinder from height or other situations which can lead to its damage.

Works should be carried out in well aired room. The coolant quickly evaporates that leads to reduction of access of oxygen and the complicated breath.

The gaseous coolant is heavier some air and rather quickly should gather below, for example, under the car.

At combustion of a coolant poisonous gas is formed. Store a coolant far from open sources of fire. Do not smoke. When using an ardent techeiskatel avoid smoke inhalation.

At carrying out welding works near air central air always delete from it a coolant. Electric welding near pipelines with a coolant can cause coolant decomposition under the influence of ultra-violet radiation.

Do not subject central air detail to influence of high temperature or an open flame. The overheat can lead to pressure increase in system and to ignition.

Condenser or evaporator cleaning by means of water vapor is not allowed. It is necessary to use only cold water or the compressed air.