VW Touran manuals

Volkswagen Touran Service Manual: 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 boiling point also changes.
For example, water boils at a lower temperature the lower the pressure.
The vapor pressure curves for water and refrigerant R134a show that, at constant pressure, reducing the temperature changes vapor to liquid (in the condenser) or that reducing the pressure causes the refrigerant to change from liquid to vapor (evaporator).
   
Vapor pressure curve of water
A -  fluid
B -  Gaseous
C -  Vapor pressure curve of water
1 -  Pressure acting on liquid in bar (psi)
2 -  Temperature in C (F)
  Pressure and Boiling Point
Vapor pressure curve of refrigerant R134a
A -  Fluid
B -  Gaseous
D -  Vapor pressure curve of refrigerant R134a
1 -  Pressure acting on liquid in bar (psi)
2 -  Temperature in C (F)
  Pressure and Boiling Point
Physical Principles
The four known states of water also apply to air conditioning system refrigerants. 1 -  gaseous (invisible) 2&n ...

Refrigerant R134a Vapor Pressure Table
The vapor pressure table for every refrigerant is published in literature for refrigeration system engineers. This table makes it possible to determine the vapor pres ...

Other materials:

MFD (multi-function display) menu
First read and observe the introductory information and safety warnings The multi-function display (MFD) is equipped with two automatic memories: 1 - Trip memory and 2 - Total journey memory. The number of the current memory on display will be shown in the upper right-hand corner of the di ...

Recycling and Disposal Regulations
  Note The laws and regulations listed below are applicable in Germany. Different or additional laws and regulations may apply in other countries. Addresses in other countries can be obtained from the relevant au ...

Warning and indicator lamps
Fig. 152 Instrument cluster display: CCS status display First read and observe the introductory information and safety warnings  Lit up Possible cause Cruise control system (CCS) controls the speed. Several warning and indicator l ...

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