2015-2022 Volkswagen Touran 4 Door Air conditioning system -> 1.2.8 Liquid receiver User Manual
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Air conditioning system -> 1.2.8 Liquid receiver 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  
♦ The reservoir collects the vaporised and gaseous mixture  
coming from the evaporator to ensure the air conditioner com‐  
lk  
pressor receives only gaseous refrigerant. The vapour be‐  
comes gaseous refrigerant.  
♦ Refrigerant oil flowing in the circuit does not remain in the res‐  
ervoir because an oil extraction hole has been provided.  
♦ Any moisture ingress into the refrigerant circuit during assem‐  
bly is trapped by a filter (desiccant bag) in the reservoir.  
♦ Gaseous refrigerant with oil is drawn in by the air conditioner  
compressor.  
Note  
♦ Renew the reservoir if the refrigerant circuit has been open for  
an extended period of time and moisture has entered or if re‐  
quired to do so owing to a specific complaint ⇒ page 79 .  
♦ Do not remove sealing plugs -A- and -B- until just before in‐  
stallation.  
♦ A dryer kept in an unsealed reservoir is saturated with mois‐  
ture after a short time and cannot be used.  
♦ When installing, observe arrow indicating direction of flow if  
applicable.  
1.2.7  
Heat exchanger for heat pump mode  
The gaseous or vaporous refrigerant compressed by the air con‐  
ditioning compressor is liquefied in the heat exchanger -A-. The  
heat that is given off in the process is picked-up by the coolant  
flowing through the system ⇒ Heating, air conditioning; Rep. gr.  
87 ; Refrigerant circuit; System overview - refrigerant circuit .  
1.2.8  
Liquid receiver  
In certain operating conditions (e.g. in heat pump mode), the re‐  
ceiver (e.g. on the condenser) is not integrated in the refrigerant  
circuit. The receiver -B- collects the refrigerant, temporarily stores  
any excess should a certain amount of refrigerant not be required  
and then feeds it in a steady flow to the expansion valve (in front  
of the evaporator in the heater and air conditioning unit) or to the  
heat exchanger in the coolant circuit of the high voltage system  
⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant circuit; Sys‐  
tem overview - refrigerant circuit .  
1. Refrigerant circuit  
45  
GETth  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
1.2.9  
Restrictor  
Restrictor in front of evaporator  
Note  
Currently, there is no air conditioning system with a restrictor in‐  
stalled in front of the evaporator.  
lk  
♦ The restrictor creates a constriction. This restriction limits the  
flow, separating the high pressure and low pressure sides in  
the refrigerant circuit. Upstream of the restrictor, the refriger‐  
ant is warm due to the high pressure. Downstream of the  
restrictor, the refrigerant is cold due to the low pressure. Up‐  
stream of the constriction is a strainer to catch dirt and down‐  
stream of the constriction is a strainer to atomise the  
refrigerant before it enters the evaporator.  
Note  
♦ Arrow -A- on the restrictor points to the evaporator.  
♦ Renew every time the refrigerant circuit is opened.  
♦ Note different versions; refer to the various customer service  
information ⇒ Electronic parts catalogue .  
Restrictor in front of heat exchanger for high-voltage battery (chill‐  
er)  
The restrictor creates a constriction. This restriction limits the flow,  
separating the high pressure and low pressure sides in the re‐  
frigerant circuit. Upstream of the restrictor, the refrigerant is warm  
due to the high pressure. Downstream of the restrictor, the refrig‐  
erant is cold due to the low pressure.  
Note  
♦ The illustration shows a refrigerant line -A- with a permanently  
installed restrictor -B- (without strainer).  
♦ The diameter of the shown restrictor hole -B- is  
approx. 0.7 mm. Depending on the refrigerant line version, this  
restrictor is permanently installed or it can be removed. For the  
removable version a strainer may be fitted to prevent the re‐  
strictor hole from being blocked by suspended particles.  
♦ Check for soiling before installing and clean or renew as nec‐  
essary.  
♦ Observe different versions.  
46  
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 1.2.9 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 1.2.17 High-pressure safety valve 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

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