Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

General information on refrigerant circuit
Página 17 de 21
refrigerant circuit is 4.7 bar
for refrigerant R134a .
00-1, Vapor pressure table
Refrigerant circuit with expansion valve
A- Low pressure side of refrigerant circuit.
B- High pressure side of refrigerant
circuit.
Component
- 1 - Evaporator, from input
to output
- 2 - A/C compressor A-
side
Aggregate state of
refrigerant
Pressure (bar
positive pressure)
Temperature in
degrees Celsius
Vapor approx. 1.2 bar 1) approx. -7 C 2)
(approx. 1.8 bar) 3) (approx. -1 C) 3)
Gas approx. 1.2 bar 1) approx. -1 C
(approx. 1.8 bar) 3) (approx. +1 C) 3)
- 3 - A/C compressor B- Gas approx. 14 bar approx. +65 C
side
- 4 - Condenser Gas, vapor, liquid approx. 14 bar approx. +55 C at
outlet
- 5 - Receiver liquid approx. 14 bar approx. +55 C
- 6 - Charging and liquid approx. 14 bar approx. +55 C
evacuating valve B- side
- 7 - Expansion valve liquid, released as approx. 14 bar approx.+ 55 C,
vapor
reduced to -7 C
- 8 - Charging and Gas
evacuating valve A- side
approx. 1.2 bar 1) approx. -7 C 2)
(approx. 1.8 bar) 3) (approx. -1 C) 3)
1) Pressure in refrigerant circuits is maintained at approx. 2
bar, 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 00-7,
Pressures, checking on vehicles .
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 00-7, Pressures,
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13/2/2005