VW Polo manuals

Volkswagen Polo Service & Repair Manual: Refrigerant R134a Physical Data

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).
   
Chemical formula CH2F–CF3 or CF3–CH2F
Chemical designation Tetrafluoroethane
Boiling point at 1 bar (14.5 psi) -26.5 °C (-15.7 °F)
Solidification point -101.6 °C (-150.88 °F)
Critical temperature 100.6 °C (213 °F)
Critical pressure 40.56 bar absolute (588 psi) equals 39.5 bar pressure (573 psi)
Refrigerant R134a
...

Critical Point
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:

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 ...

Introduction
This chapter contains information on the following subjects:  → Interior mirror  → Exterior mirrors For safety reasons it is important that the driver positions the exterior and interior mirrors correctly before starting a journey . You can use the exterior mirrors and the int ...

Introduction
This chapter contains information on the following subjects:  → Fuses in the vehicle  → Changing a blown fuse At the time of print we are unable to provide an up-to-date overview of the locations of the fuses for the electrical consumers. This is because the vehicle is under co ...

© 2016-2020 Copyright www.vwpolo.net