Volkswagen Touran Service Manual: Refrigerant Circuit with Expansion Valve
| A-Low pressure side of refrigerant circuit. |
| B-High pressure side of refrigerant circuit. |
|
Component |
Aggregate State of Refrigerant |
Pressure bar (psi) Positive Pressure |
Temperature
in Degrees Celsius (Fahrenheit) |
| -1-
Evaporator, from input to output |
Vapor |
Approximately 1.2 (17.4)
→ Note |
Approximately -7 (20)
→ Note |
| |
|
(Approximately 1.8
(26.1))
→ Note |
Approximately -1 (30)
→ Note |
| -2-
A/C compressor A-side |
Gas |
Approximately 1.2 (17.4)
→ Note |
Approximately -1 (30) |
| |
|
(Approximately 1.8
(26.1))
→ Note |
Approximately -1 (30)
→ Note |
| -3-
A/C compressor B-side |
Gas |
Approximately 14 (203.1) |
Approximately 65 (149) |
| -4-
Condenser |
Gas, vapor, fluid |
Approximately 14 (203.1) |
Approximately 55 (131) at
outlet |
| -5-
Receiver |
Fluid |
Approximately 14 (203.1) |
Approximately 55 (131) |
| -6-
Extraction and filling valve, B-side |
Fluid |
Approximately 14 (203.1) |
Approximately 55 (131) |
| -7-
Expansion valve |
Fluid, released as vapor |
Approximately 14 (203.1) |
Approximately 55 (131),
reduced to -7 (20) |
| -8-
Extraction and filling valve, A-side |
Gas |
Approximately 1.2 (17.4)
→ Note |
Approximately -7 (20)
→ Note |
| |
|
(Approximately 1.8 (26.1))
→ Note |
Approximately -1 (30)
→ Note |
| 1) |
Pressure in refrigerant circuits is maintained at
approximately 2 bar (29 psi), regulated by A/C compressor, even though
heat transfer changes and engine speeds vary. However, this applies only
within the performance range of the A/C compressor; if the performance
limits of the A/C compressor are exceeded, the pressure increases. Refer
to
→ Chapter "Pressures, Checking". |
| 2) |
Within the control range of the A/C compressor,
temperature in the refrigerant circuits is maintained, regulated by A/C
compressor, even though heat transfer changes and engine speeds vary.
However, this applies only within the performance range of the A/C
compressor; if the performance limits of the A/C compressor are
exceeded, the temperature increases. Refer to
→ Chapter "Pressures, Checking". |
| 3) |
Measured values for A/C systems with two evaporators |
 Note
| A/C compressors which do not regulate their performance are
switched off by the respective control module via the A/C
Compressor Regulator Valve -N280- at an evaporator temperature
below 0 C (32 F). |
| In vehicles with A/C Compressor Regulator Valve -N280-, the
pressure is modified on the low pressure side by the valve. |
|
|
|
WARNING
When performing work on refrigerant circuit, observe
all generally applicable safety precautions and pressure
...
Arrows point in direction of refrigerant flow.
A-Low pressure side of refrigerant circuit.
B-High pressure side of refrigerant circuit.
&nbs ...
Other materials:
Filling the tank with petrol or diesel
Fig. 168 In the driver door: tank flap
release button
Fig. 169 Open tank flap with tank cap
attached to the holder
First read and observe the introductory information
and safety warnings Switch off the engine, ignition, mobile telephone and
auxiliary heater before refuelling and leave ...
Maximum permitted trailer weights
First read and observe the introductory information
and safety warnings All data in the official vehicle
documents take precedence over these data. All data in this manual are valid for
the basic model. The vehicle data sticker in the service schedule and the official
vehicle documents ...
Convenience sub-menu
First read and observe the introductory information
and safety warnings
Convenience menu
Function
Central locking system
Door unlocking
The following doors are unlocked when the vehicle is
unlocked with the vehicle key, dependin ...
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Refrigerant Circuit Pressures and Temperatures
Refrigerant Circuit with Restrictor and Reservoir