2015-2022 Volkswagen Touran 4 Door Air conditioning system -> 1.2.17 High-pressure safety valve User Manual
MyCarUserManual.com
USER MANUALS FOR EVERY MAKE & MODEL

Air conditioning system -> 1.2.17 High-pressure safety valve for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
1.2.17  
High-pressure safety valve  
The high pressure safety valve is fitted to the air conditioner com‐  
pressor or the receiver.  
The valve opens at a pressure of approx. 38 bar (overpressure)  
and closes again when the pressure has dropped (to approx. 35  
bar).  
Not all the refrigerant is lost from the system.  
Note  
♦ Depending on the version, a transparent plastic washer -B-  
may be attached to the high pressure safety valve -A- which  
breaks off as soon as the valve is actuated.  
♦ Depending on the version of high pressure safety valve -A-, a  
cover -C- may also be pushed onto the high pressure safety  
valve -A-. Should the pressure in the refrigerant circuit actually  
rise above the opening pressure of the high pressure safety  
valve -A- and cause the valve to open, refrigerant will not es‐  
cape in one direction but scatter through the openings -D-  
beneath the cover -C- instead.  
♦ If a high-pressure safety valve -A- needs to be renewed, the  
specified torque for the new valve (depending on the manu‐  
facturer and the version of the air conditioner compressor)  
must be observed when installing. Air conditioner compres‐  
sors manufactured by “Denso”, “Sanden” and “Valeo” are  
equipped with an O-ring seal (currently valid torque settings  
are: 10 Nm for “Denso” and “Zexel/Valeo” air conditioner com‐  
pressors, and 15 Nm for “Sanden” air conditioner compres‐  
sors). Air conditioner compressors manufactured by “Delphi”  
are fitted with an oil seal (currently valid torque setting: 15 Nm).  
lk  
♦ Renewing seals (oil seals or O-rings) ⇒ Electronic parts cata‐  
logue .  
♦ If a seal (oil seal or O-ring) fitted to the high-pressure safety  
valve is not available as a replacement part, the removed old  
part can be reused (as an exception to the general rule of using  
new seals only). The old seal, however, must always be  
checked for damage prior to installation. If any damage or de‐  
formation is detected on the old seal, it must be renewed with  
a commercially available new part ⇒ Electronic parts cata‐  
logue .  
♦ After filling the refrigerant circuit, check the installed high-  
pressure safety valve for leaks using e.g. an electronic leak  
detector.  
1. Refrigerant circuit  
53  
GETth  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
1.2.18  
Non-return valves  
Non-return valves separate the refrigerant circuit into different  
areas ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant circuit  
(vehicle-specific workshop manual).  
Note  
♦ The non-return valve -3- shown in installed e.g. in the Audi Q7  
e-tron ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific workshop manual).  
♦ Non-return valves in the refrigerant circuit have a certain hold‐  
ing pressure in the direction of flow (approx. 0.1 bar or  
100 mbar). To ensure that the refrigerant circuit can be evac‐  
uated completely (residual pressure below 5 mbar), all of the  
electrically actuated valves must therefore be open.  
♦ Depending on the version, the direction of flow may be indi‐  
cated by a sticker.  
lk  
54  
Rep. gr.87 - Air conditioning system  
GETth  

Related Topics

Air conditioning system
1 Refrigerant circuit 1.1 System overview - refrigerant circuit 1.1.1 System overview - refrigerant circuit with expansion valve and receiver 1.1.2 System overview - refrigerant circuit with restrictor and reservoir 1.1.3 System overview - refrigerant circuit with electrically driven air conditioner compressor 1.2 General description - components of refrigerant circuit 1.2.1 Layout and function of refrigerant circuit 1.2.2 Mechanical air conditioner compressor 1.2.3 Electrical air conditioner compressor for hybrid vehicles 1.2.4 Condenser 1.2.5 Evaporator 1.2.6 Reservoir 1.2.7 Heat exchanger for heat pump mode 1.2.8 Liquid receiver 1.2.9 Restrictor 1.2.10 Receiver 1.2.11 Expansion valve (with and without shut-off valve) 1.2.12 Refrigerant shut-off valves 1.2.13 Refrigerant line with internal heat exchanger 1.2.14 Quick release couplings of refrigerant lines 1.2.15 Seals 1.2.16 Pipes and hoses in refrigerant circuit 1.2.18 Non-return valves 1.2.19 Quick-release coupling connections in refrigerant circuit 1.2.20 Connections with valve for switches in refrigerant circuit 1.2.21 Pressure senders and switches in refrigerant circuit 1.2.22 Refrigerant pressure and temperature sender 1.2.23 Air conditioner compressor regulating valve N280 1.2.24 Refrigerant temperature sender 1.3 Possible complaints 1.3.1 Prerequisites for investigating a complaint 1.3.2 Possible complaints 1.3.3 Odours from heater and air conditioner unit 1.4 Investigating leaks 1.4.1 General information about investigating leaks in the refrigerant circuit 1.4.2 Searching for leaks in refrigerant circuits using an electronic leak detector 1.4.3 Searching for leaks with UV leak detection system 1.4.4 Detecting leaks in a vacuum test using air conditioner service station, or in a pressure test 1.4.5 Detecting leaks in a pressure test (with nitrogen or compressed air) 1.5 Renewing components 1.5.1 General information about renewing components 1.5.2 Renewing leaking or damaged components of empty refrigerant circuit 1.5.3 Renewing leaking or damaged components of charged refrigerant circuit 1.5.4 Renewing air conditioner compressor with no need to clean refrigerant circuit 1.5.5 Renewing air conditioner compressor due to leaks or internal damage 1.5.6 Renewing desiccant cartridge / receiver after cleaning refrigerant circuit 1.5.7 Renewing receiver with no need to clean refrigerant circuit 1.5.8 Renewing desiccant cartridge / desiccant bag with no need to clean refrigerant circuit 1.6 Cleaning refrigerant circuit 1.6.1 General information about cleaning refrigerant circuit 1.6.2 Preparations for cleaning refrigerant circuit (flushing with R1234yf refrigerant) 1.6.3 Refrigerant circuit cleaning procedure 1.6.4 Principle circuit diagrams for cleaning (flushing circuits) - refrigerant circuit with expansion valve and receiver 1.6.5 Principle circuit diagrams for cleaning (flushing circuits) - refrigerant circuit with restrictor and receiver 1.6.6 Principle circuit diagrams for cleaning (flushing circuits) - vehicles with high-voltage system (without auxiliary) 1.6.7 Principle circuit diagrams for cleaning (flushing circuits) - vehicles with high-voltage system (with auxiliary) 1.6.8 Adapters for setting up flushing circuits 1.6.9 General information about blowing through with compressed air or nitrogen 1.6.10 Blowing through refrigerant circuit with compressed air or nitrogen 1.7 Checking pressures with pressure gauge 1.7.1 Display on pressure gauges 1.7.2 Pressure gauges enable the following test and measurement work 2 Working with air conditioner service station 2.1 Working with air conditioner service station 2.2 Connecting air conditioner service station to refrigerant circuit 2.3 Performing gas analysis of refrigerant 2.4 Emptying refrigerant circuit 2.5 Evacuating refrigerant circuit 2.6 Charging refrigerant circuit 2.7 Bringing air conditioning system into service after charging 2.8 Switching off air conditioner service station and separating from refrigerant circuit 2.9 Charging refrigerant in reservoir 2.10 Emptying air conditioner service station 2.11 Cleaning electrical air conditioning compressor 2.12 Cleaning refrigerant circuit 2.13 Filling contaminated refrigerant in a recycling cylinder for analysis, processing or disposal 2.13.1 Filling contaminated refrigerant in a recycling cylinder using technical equipment 2.13.2 Filling undercooled contaminated refrigerant in a recycling cylinder 2.14 Checking pressures 2.14.1 General information on checking pressures in the refrigerant circuit 2.14.2 Pressures and temperatures in refrigerant circuit 2.14.3 Checking pressures in the refrigerant circuit with the ignition switched off 2.14.4 Checking pressures with air conditioning system switched on - vehicles with mechanical air conditioning compressor 2.14.5 Checking pressures with air conditioning system switched on - vehicles with electrical air conditioning compressor 3 Testing equipment and tools 3.1 Tools and materials available from distribution centre or importer 3.2 Tools and materials available commercially 3.3 Tools that can be locally manufactured

Popular Owner Manuals

Audi
Audi
BMW
BMW
Citroen
Citroen
Ford
Ford
Honda
Honda
Peugeot
Peugeot