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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
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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:

Dimensions
Fig. 17 Dimensions First read and observe the introductory information and safety warnings The data in the table apply to the most basic German model. The specified values can vary due to different tyre and wheel sizes, if additional equipment is fitted, for different model versions, for ret ...

Tyre pressure
Fig. 146 On the inside of the tank flap: tyre inflation pressure label First read and observe the introductory information and safety warningsThe correct tyre pressure for factory-fitted tyres is shown on a sticker and applies to all-season, summer and winter tyres. The sticker is located ...

Introduction
This chapter contains information on the following subjects:  → Warning and indicator lamps    → Information on steering  Additional information and warnings: Starting and stopping the engine   Battery   Tow-starting and towing   WARNING The steeri ...

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