VW Touran manuals

Volkswagen Touran Service Manual: Refrigerant Circuit with Restrictor and Reservoir

Arrows point in direction of refrigerant flow.
A-Low pressure side of refrigerant circuit.
B-High pressure side of refrigerant circuit.

Refrigerant Circuit with Restrictor and Reservoir

     
Component Aggregate state of refrigerant Pressure bar (psi) positive pressure Temperature in degrees Celsius (Fahrenheit)
-1- A/C compressor B-side Gas up to 20 (290 psi) up to 70 (158)
-2- Condenser From gas to vapor to fluid up to 20 (290 psi) up to 70 (158)
-3- Restrictor From fluid to vapor B-side to 20 (290 psi), A-side greater than 1.5 (21.8 psi) B-side up to 60 (140 psi), A-side warmer than -4 (25)
-4- Evaporator From vapor to gas Greater than 1.5 (21.8 psi) Warmer than -4 (25)
-5- Reservoir Gas    
-6- A/C compressor A-side Gas    
 
Pressures on A-side are maintained at approximately 2 bar (29 psi) by "regulating" A/C compressor also at various engine speeds. However, this applies only within the performance range of the A/C compressor; if the performance limits of the A/C compressor are exceeded. Refer to → Chapter "Pressures, Checking".
  Note
In vehicles with A/C Compressor Regulator Valve -N280-, the pressure is modified on the low pressure side by the valve.
     
Refrigerant Circuit with Expansion Valve
A-Low pressure side of refrigerant circuit. B-High pressure side of refrigerant circuit.       Component A ...

Pressure Gauge, Tests and Measurements
Indicators on pressure gauge 1 -  Temperature scale for refrigerant R134a CF3CH2F or CH2FCF3. 2 -  ...

Other materials:

An economic driving style
First read and observe the introductory information and safety warnings Changing gear earlier In principle, the highest gear is always the most economical gear. A rule of thumb for most vehicles: at a speed of 30 km/h (18 mph) drive in 3rd gear, at 40 km/h (25 mph) in 4th gear and at 50 km/ ...

Warning lamps and indicator lamps
First read and observe the introductory information and safety warnings  Lit up Possible cause   Correction Brake system fault. Do not drive on! Use expert assistance immediately   . Brake fluid level is too l ...

Round Connector Systems
  Note If necessary, housing securing mechanisms (secondary locks) must be released or removed using specified tool before releasing the contacts. Refer to → Chapter "Secondary Lock".     ...

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