Air Conditioning: Notes
Some variations may occur in the illustrations, however the essential information is always correct.
The illustration shows the placement in a vehicle with engine B6324S. The main difference in vehicles with other engines is the placement of the compressor.
The air conditioning system only works when the outdoor temperature is above 0 °C. At lower temperatures the pressure in the system is too low and the compressor is never activated.
The air conditioning system only works when the engine is running. It works irrespective of the revs and the vehicle's speed. However, at full throttle, Kick down, the compressor is deactivated, to give improved acceleration power when e. g. overtaking.
The blower fan must be operating before the climate control system can be engaged.
The air conditioning system has only two positions, off and on. If it is too cold in the passenger compartment, you control the temperature with the normal heat and blower fan controls.
There are five main components in the climate control system:
- evaporator
- receiver drier (integrated with the condenser)
- compressor
- condenser
- expansion valve.
The system is filled with a suitable quantity of refrigerant and oil. The role of the oil is to lubricate and seal the compressor (piston and cylinder).
A fluorescent leak-tracing agent is added to the refrigerant. This makes it possible to trace leaks using UV light.