VW Polo manuals

Volkswagen Polo Service & Repair 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 ...

Pressure Gauge, Tests and Measurements
Indicators on pressure gauge 1 -  Temperature scale for refrigerant R134a CF3–CH2F or CH2F–CF3. 2 -&nb ...

Other materials:

Battery with Visual Indicator, Standard
This is a maintenance-free battery with liquid electrolyte (wet battery).   WARNING Do not check or charge batteries that have a visual indicator that is bright yellow. Jump starting must ...

Refrigerant Circuit Component Arrangement
  Caution Non-approved tools or materials such as leak sealing additives can cause damage or malfunctions in the system. Only use tools and materials approved by the manufactu ...

Indicator lamps
First read and observe the introductory information and safety warnings Lit up Possible cause Solution Engine management system fault (Electronic Power Control). The engine should be checked by a qualified workshop as s ...

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