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:
AGM Battery, Checking
Perform Battery Checks in the Following Sequence:
1.
Visual inspection. Refer to
→ Chapter „Visual Inspection“.
2.
Check the battery using the Battery Tester -VAS6161-. Refer
to
...
Childproof lock
Fig. 27 In the left rear door: childproof
lock Ⓐ switched off, Ⓑ switched on
Fig. 28 In the right rear door: childproof
lock Ⓐ switched off, Ⓑ switched on
First read and observe the introductory information
and safety warnings
The childproof lock prevents the rear doors from being ...
Checking with Expansion Valve and Receiver/Dryer, with Internally Regulated
A/C Compressor
Note
Connecting service station. Refer to
→ Chapter „Connecting Service Station“.
Observe test requirements. Refer to
→ Chapter „Pressures, Checking“.
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Pressure and Boiling Point