Heater and air conditioner. BMW the 5th E28/E34 series (from 1981 to 1993 of release) .
Repair of BMW E28 and series E34 from 1981 to 1993
1. Cars of the BMW brand of 5-series
2. Engine
3. Cooling system
4. Power supply system
5. Ignition system
6. Control systems of the engine and decrease in toxicity of the fulfilled gases
7. System of production of the fulfilled gases
8. Coupling
9. Manual box of gear shifting (RKPP) and automatic transmission (AT)
10. Transmission line
11. Steering and suspension bracket
12. Brake system
13. Body
14. Control body sizes
15. Heater and air conditioner
15.1. Removal, check of work and installation of a heater and air conditioner
15.2. Removal and control unit installation by operating modes of a heater and air conditioner
15.3. Removal and installation of the heat exchanger of a heater
15.4. Conditioner and precautionary measure service
15.5. Removal and installation of the compressor of central air of air
15.6. Removal and installation of the motor of the supercharger of the conditioner (E28 model / "retro")
15.7. Removal and installation of the condenser of central air of air
15.8. Removal and installation of an accumulator / degidrator of central air of air
15.9. Removal and evaporator installation
16. System of onboard electric equipment
17. Routine maintenance of the car
18. Size table and adjusting data
19. Schematic electric circuits
20. Governing bodies and operation receptions
21. System of onboard diagnostics - a principle of functioning and codes of malfunctions
 








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15. Heater and air conditioner

The system of heating consists of the fan and the heat exchanger located in the case of a heater, with the hoses connecting the heat exchanger to system of cooling of the engine, and the handle of management of air heater/central air on the dashboard. The hot cooler of the engine circulates through heat exchanger galleries in engine operating time. At inclusion of a heater the zaslonka which directs air via the heat exchanger opens, and then warm air arrives in car salon. The fan switch on the handle of management turns on the motor of the supercharger which strengthens the stream of air passing through the heat exchanger, giving thus an additional exit of heat, for example, for humidity reduction in salon, etc.

The structure of central air of air includes the condenser established before a radiator, the evaporator located in the neighbourhood with the heat exchanger of a heater, the compressor fixed on the block of the engine, the accumulator-degidrator which includes a safety valve of a high pressure, and also the fittings connecting among themselves all listed components.

The fan of a heater banishes warm air from car salon via the evaporator heat exchanger (working by a principle, the return to radiator work) where there is a transfer of heat of air to a system coolant. The liquid coolant thus begins to boil, evaporating low pressure, and takes away with itself warmth, leaving the evaporator.

Familiarize with precautionary measures at the beginning of the Section Removal and control unit installation by operating modes of a heater and the air conditioner, concerning the potential danger connected with work of central air of air.



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15.1. Removal, check of work and installation of a heater and air conditioner