Audi 80/90/Coupe

since 1986-1991 release

Repair and operation of the car



Audi 80/90/Coupe
+ 1.2. Identification of the car
+ 2. Engines, carburetors
3. Lubrication system
+ 4. Cooling system
+ 5. Fuel system
+ 6. Exhaust system
+ 7. System of ignition
+ 8. Transmission
+ 9. Suspension brackets, wheels
+ 10. Brake system
+ 11. Steering
+ 12. Body, salon
- 13. Air conditioning system
   13.2. Pressure switches
   13.3. Water descent valve
   13.4. Wedge-shaped compressor belt of the conditioner
   13.5. Check of vacuum system
   13.6. Places of connections of lines of coolant, throttle
   13.7. Conditioner compressor
   13.8. Conditioner compressor coupling
+ 14. Electric equipment






13. Air conditioning system

13.1. Conditioner

GENERAL INFORMATION

Conditioner cooling system

And – area of low pressure
In – area of high pressure
1. Throttle
ring consolidation: internal diameter is 9.3 mm
thickness is 1.8 mm
inhaling moment: 10.0 N of m.
3. Valve of high pressure
4. Switch of high pressure of coolant
color of the case: yellow or green
working pressure:
it is closed: 13.1–17.5 bar
opens: 10.6–15.0 bar
ring consolidation: internal diameter is 9.3 mm
thickness is 1.8 mm
inhaling moment: 10.0 N of m.
5. Switch of high pressure of the conditioner (5 cylinder engine)
red case
opens: 28.2 bar-31.0 of bars
it is closed: 10.3 bar-17.3 of bars
ring consolidation: internal diameter is 9.3 mm
thickness is 1.8 mm
inhaling moment: 10.0 N of m.
6. The serving valve of high pressure (the 5-cylinder engine)
treats the switch of high pressure of the conditioner
it is used for descent and charging of the cooling system of the conditioner
7. Condenser
ring consolidation on an entrance: internal diameter is 14.0 mm
thickness is 1.8 mm
ring consolidation at the exit: internal diameter is 7.5 mm
thickness is 1.8 mm
the inhaling moment on an entrance: 26.5 N of m.
the inhaling moment at the exit: 16.5 N of m.
8. Switch of high pressure of the conditioner (4-cylinder engine)
9. The serving valve of high pressure (the 4-cylinder engine)
treats the switch of high pressure of the conditioner
it is used for descent and charging of the cooling system of the conditioner
10. Conditioner compressor
ring consolidation of connection with the line of low pressure: internal diameter is 17.2 mm
thickness is 1.8 mm
ring consolidation of connection with the line of high pressure: internal diameter is 14.0 mm
thickness is 1.8 mm
moment of an inhaling of connection with the line of low pressure: 42 N. of m.
moment of an inhaling of connection with the line of high pressure: 26.5 N of m.
11. Conditioner compressor coupling
12. The serving valve of low pressure
it is used for descent and charging of the cooling system
13. Cap
14. Store
ring consolidation on an entrance: internal diameter is 17.2 mm
thickness is 1.8 mm
at the exit: internal diameter is 17.2 mm
thickness is 1.8 mm
the inhaling moment on an entrance: 42.0 N of m.
at the exit: 42.0 N of m.
15. Switch of low pressure of coolant of the conditioner
working pressure:
it is closed: 1.45–1.6 bar
opens: 2.9–3.2 bar
ring consolidation: internal diameter is 9.3 mm
thickness is 1.8 mm
inhaling moment: 5.5 N of m.
16. Valve of low pressure
17. Evaporator
ring consolidation on an entrance: internal diameter is 10.8 mm
thickness is 1.8 mm
at the exit: internal diameter is 17.2 mm
thickness is 1.8 mm
inhaling moment: 16 N. of m.

Prevention

When you remove the condenser in the cars equipped with 5 cylinder engine, first of all, unscrew the line of coolant conducting from the evaporator to the condenser.


Elements of control of the conditioner

1. Hatch of supply of fresh air and
air recirculation
2. External temperature sensor
3. Vacuum amplifier
it is intended for supply of fresh air in the hatch and for air recirculation
4. Dashboard air inlet
5. Two-sided valve
it is intended for supply of fresh air in the hatch and for air recirculation
6. Delivery fan of fresh air
7. Panel of the central air inlet and control system
8. Switch of supply of fresh air and mode of recirculation
9. Switch of the air conditioner
10. Control unit of the conditioner
11. Ropes
connection on the control unit
connections with folding gates
12. Openings for heating of legs
13. Consecutive resistance of the delivery fan

Prevention

The devices described here are located in a compartment of the engine and supplement elements of the air conditioning system.

For replacement of the faulty vacuum block it is necessary to remove a heater, first of all.


Scheme of an arrangement of components

1. External temperature sensor
removal and installation:
uncover the ventilating hatch and a ware box
2. Hatch of supply of fresh air
3. The temperature sensor (on a cover)
4. The vacuum block of the operating gate (having blown in legs and glasses)
Vacuum hoses
5. Connecting nest
for vacuum hoses and epektrichesky contacts of a heater
6. An opening for an obduv of legs
7. Vacuum block
ensures functioning of the central air gate (the gate regulating intake of air in openings for an obduv of legs and glasses)

8. Adjusting engine
regulates position of the gate of control of temperature (by means of a feedback potentiometer)
feedback potentiometer
9. Vacuum block
ensures functioning of the air gate retsirkulirouyemogo/fresh air
10. The engine of the fan forcing fresh air
11. Heater
together with the evaporator
12. Control unit
regulates operation of the delivery fan
13. Switch of low pressure
it is intended for ensuring functioning of the cooling system