Volkswagen Polo Service & Repair Manual: Physical Principles
| The four known states of water also apply to air
conditioning system refrigerants. |
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| 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. |
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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. |
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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:
Test Requirements
Note
Check cooling performance. The A/C system is functioning
correctly when the air flowing from the instrument panel vents
has a temperature of 70C or lower.
Setting on Climatronic “LO”.
...
Stowage compartment
on the front passenger side
Fig. 97 Stowage compartment on the front
passenger side
Fig. 98 Open stowage compartment on the
front passenger side
First read and observe the introductory information
and safety warnings
Opening and closing the stowage compartment
To open, pull up the opening lever .
To close ...
Extraction and Charging System Safety Regulations
Make sure the shut-off valves are closed before connecting
the charging system to the air conditioning system.
Make sure the process is finished before disconnecting the
charging system from the A/C system. This prevents any
refrig ...
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Pressure and Boiling Point