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
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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:

A/C Refrigerant High Pressure Switch -F23
  Note For switching pressures, removing and installing switches and switch arrangement and version, see vehicle-specific refrigerant circuit. Refer to → Rep. Gr.87.     ...

Stowage
Fig. 161 In the luggage compartment underneath the floor covering A: Spare wheel and vehicle toolkit without ball coupling, B: Spare wheel and vehicle toolkit with ball coupling, C: Spare wheel and vehicle toolkit without ball coupling First read and observe the introductory information an ...

Operating ParkPilot
Fig. 120 In the rear bumper: ParkPilot ultrasound sensors First read and observe the introductory information and safety warnings The ParkPilot uses ultraound sensors to determine the distance between the rear bumper and an obstacle. There are 4 ultrasound sensors in the rear bumper   ...

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