VW Touran manuals

Volkswagen Touran Service Manual: Physical Principles

The four known states of water also apply to air conditioning system refrigerants.
1 -  gaseous (invisible)
2 -  vapor
3 -  fluid
4 -  solid
  Physical Principles
When water is heated in a vessel (heat absorption), water vapor can be seen to rise. If the vapor is further heated through heat absorption, the visible vapor turns into invisible gas. The process is reversible. The warmth is extracted from gaseous water, vapor forms first, then water and then ice.
A -  Heat absorption
B -  Heat emission
  Physical Principles

Heat Transfer

Every substance consists of a mass of moving molecules. The fast moving molecules of a warmer substance give off some of their energy to the cooler and thus slower molecules. As a result, the molecular motion of the warmer substance slows down and that of the colder substance is accelerated. This process continues until the molecules of both substances are moving at the same speed. They are then at the same temperature and no further heat exchange takes place.
   
A/C Technology Basic Principles
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Pressure and Boiling Point
The boiling point given in tables for a liquid is always referenced to an atmospheric pressure of 1 bar (14.5 psi). If the pressure acting on a fluid changes, its boi ...

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Volkswagen Touran Owners Manual. Checking the engine oil level and refilling engine oil
Fig. 174 Oil dipstick with markings Fig. 175 In the engine compartment: engine oil filler cap First read and observe the introductory information and safety warnings Preparation Park the vehicle on a level surface to ensure the engine oil reading is correct. Switch off the en ...

Volkswagen Touran Owners Manual. Introduction
This chapter contains information on the following subjects:  → Washing the vehicle    → Washing the vehicle with a high-pressure cleaner    → Cleaning windows and exterior mirrors    → Cleaning and changing windscreen wiper blades    → Waxing and po ...

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