Volkswagen Polo Service & Repair Manual: Refrigerant R134a Environmental Information
| Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as refrigerant. |
| The refrigerant employed is tetrafluoroethane R134a, which
boils at -26.5 °C (-15.7 °F) at a vapor pressure of 1 bar (14.5
psi). |
| R134a is a fluorocarbon and contains no chlorine. |
| R134a has a shorter atmospheric life span than refrigerant
R12. |
| R134a does not damage the ozone layer. The ozone depletion
potential is zero. |
| The greenhouse potential of R134a (Global Warming Potential
= GWP) is approximately 1430 (the GWP of carbon dioxide is 1). |
| The global warming effect of R134a is ten times less than
that of refrigerant R12. |
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Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as ref ...
Other materials:
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 -
gaseous (invisible)
2 -
vapor
3 -
fluid
4&nbs ...
Checking
–
Turn off the ignition.
–
Connect pressure gauge battery (A/C service station).
–
Take pressure gauge readings. There are two possible results
A and B.
&nbs ...
SAFELOCK mechanism
First read and observe the introductory information
and safety warnings
Depending on the vehicle equipment level, the vehicle may have a SAFELOCK mechanism
and an anti-theft alarm .
Function
Action
Locking the vehicle and activating the SAFELOCK mechanis ...
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