VW Golf manuals

Volkswagen Golf Service & Repair Manual: Distribution of the refrigerant circuit components and their influence on the high-pressure and low-pressure sides

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / General information on refrigerant circuit / Refrigerant circuit components / Distribution of the refrigerant circuit components and their influence on the high-pressure and low-pressure sides

On the high-pressure side, there are the condenser, the receiver and the restrictor or expansion valve that acts as the separation between the high-pressure fluid and low-pressure fluid sides.
High pressure is created because the restrictor or expansion valve forms a restriction and holds back the refrigerant, leading to increased pressure and temperature.
Excessive pressure results if the circuit is filled with too much refrigerant or refrigerant oil, or the condenser is dirty, the radiator fan is defective, there is a blockage in the system or there is moisture in the refrigerant circuit (causing the restrictor or expansion valve to ice up).
On the low-pressure side, there are the evaporator, the reservoir, the temperature sensor for the evaporator and the air conditioner compressor that acts as the separation between the high-pressure and low-pressure gas sides.
A loss of pressure in the system can be due to loss of refrigerant, restrictor or expansion valve failure (not creating a restriction), defective air conditioner compressor or an iced-up evaporator.
   
Refrigerant circuit components
  Caution Non-authorised tools or materials (e.g. leak inhibitor additive) may cause damage or adversely influence t ...

Air conditioning system compressor with magnetic clutch
The air conditioner compressor is driven by a V-belt from the engine. An electromagnetic clutch is fitted to the air conditioner compressor. Wh ...

Other materials:

Assembly overview - speed sensor on rear axle, all-wheel drive
1 -  ABS speed sensor Clean inside surface of hole before inserting sensor Coat inside surface with high-temperature paste -G 052 112 A3- Removing and installing → Chapter 2 -  Bolt ...

Draining refrigerant circuit using air conditioner service station
  WARNING High-voltage on high-voltage system. Danger of electric shock on air conditioner compressor! Models with a high-voltage system: now de-energise the high-voltage system ...

Removing and installing clutch engagement
Removing Dual clutch removed → Chapter. –  Remove large engaging lever with small engagement bearing.   Note The upper section of bushing cannot be removed or i ...

© 2016-2019 Copyright www.vwgolf.org