VW Polo manuals

Volkswagen Polo Service & Repair 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
...

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 ...

Other materials:

Two-Part HS Optimum Plus Clear Coat
Definition: Two-Part HS Optimum Plus Clear Coat -LZK 769 K07 A5- Edition 04/2013 Product Description The two-part HS optimum plus clear coat is a VOC compliant high solid cle ...

Additional Information Sources
Technical Service Handbook outlining action to be taken to rectify current problems. For the repair manual for model-specific repair work. Refer to → Heating, Ventilation and Air Conditioning; Rep. Gr.87. ...

Waxing and polishing the vehicle
First read and observe the introductory information and safety warningsWaxing Waxing protects the paintwork. You will need to re-wax the vehicle with a good hard wax if water no longer clearly forms small drops and runs off the paintwork when it is clean. Even if a wax solution is used regul ...

© 2016-2026 Copyright www.vwpolo.net