2009-2017 Volkswagen Polo SUV Air conditioning system -> 1.1 System overview - refrigerant circuit User Manual
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Air conditioning system -> 1.1 System overview - refrigerant circuit for Your Volkswagen Polo SUV Fifth Generation (2009-2017)

lk  
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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
87 – Air conditioning system  
1
Refrigerant circuit  
⇒ “1.1 System overview - refrigerant circuit”, page 30  
⇒ “1.2 General description - components of refrigerant circuit”,  
page 36  
⇒ “1.3 Possible complaints”, page 64  
⇒ “1.4 Investigating leaks”, page 68  
⇒ “1.5 Renewing components”, page 79  
⇒ “1.6 Cleaning refrigerant circuit”, page 92  
⇒ “1.7 Checking pressures with pressure gauge”, page 126  
1.1  
System overview - refrigerant circuit  
⇒ “1.1.1 System overview - refrigerant circuit with expansion valve  
and receiver”, page 30  
⇒ “1.1.2 System overview - refrigerant circuit with restrictor and  
reservoir”, page 32  
⇒ “1.1.3 System overview - refrigerant circuit with electrically driv‐  
en air conditioner compressor (with and without battery cooling  
module)”, page 33  
1.1.1  
System overview - refrigerant circuit  
with expansion valve and receiver  
Note  
♦ The arrows indicate the direction of coolant flow.  
♦ The following diagram shows an example of a refrigerant cir‐  
cuit with 2 evaporators and one internal heat exchanger.  
♦ The layout of the refrigerant circuit is specific to the vehicle ⇒  
Heating, air conditioning system; Rep. gr. 87 ; Refrigerant cir‐  
cuit (vehicle-specific workshop manual).  
HD = High-pressure side  
ND = Low-pressure side  
30  
Rep. gr.87 - Air conditioning system  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
1 - Air conditioner compressor  
regulating valve - N280-  
2 - Air conditioner compressor  
3 - Pulley  
❑ Depending on the ver‐  
sion, an air conditioning  
system magnetic clutch  
- N25- is installed in the  
belt pulley ⇒ Heating,  
air conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
❑ Depending on the ver‐  
sion there may be a  
drive unit instead of the  
belt pulley ⇒ Heating,  
air conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
4 - High-pressure safety valve  
5 - Refrigerant pressure send‐  
er  
❑ Vehicle-specific ver‐  
sions ⇒ Heating, air  
conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit .  
6 - Condenser (with receiver)  
7 - Receiver  
❑ Installed on, at or in the  
condenser ⇒ Heating,  
air conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific workshop manual).  
❑ With desiccant cartridge  
8 - Service connection, high-pressure side  
❑ With sealing cap  
9 - Refrigerant line with internal heat exchanger  
10 - Front expansion valve  
11 - Front evaporator  
❑ Evaporator in front heater and air conditioning unit (installed under dash panel)  
12 - Service connection, low-pressure side  
❑ With sealing cap  
13 - Rear expansion valve  
❑ Only on vehicles with rear air conditioning unit (extra equipment)  
14 - Rear evaporator  
❑ Only on vehicles with rear air conditioning unit (extra equipment)  
1. Refrigerant circuit  
31  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
1.1.2  
System overview - refrigerant circuit  
with restrictor and reservoir  
Note  
♦ The arrows indicate the direction of coolant flow.  
♦ The following diagram shows an example of a refrigerant cir‐  
cuit with one evaporator.  
♦ This refrigerant circuit layout is currently not planned for VW/  
Audi vehicles.  
♦ The layout of the refrigerant circuit is specific to the vehicle ⇒  
Heating, air conditioning system; Rep. gr. 87 ; Refrigerant cir‐  
cuit (vehicle-specific workshop manual).  
HD = High-pressure side  
ND = Low-pressure side  
1 - Air conditioner compressor  
regulating valve - N280-  
2 - Air conditioner compressor  
3 - Pulley  
❑ Depending on the ver‐  
sion, an air conditioning  
system magnetic clutch  
- N25- is installed in the  
belt pulley ⇒ Heating,  
air conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
❑ Depending on the ver‐  
sion there may be a  
drive unit instead of the  
belt pulley ⇒ Heating,  
air conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
4 - High-pressure safety valve  
5 - Condenser  
6 - Refrigerant pressure send‐  
er  
❑ Vehicle-specific ver‐  
sions ⇒ Heating, air  
conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
7 - Service connection, high-  
pressure side  
❑ With sealing cap  
8 - Restrictor  
9 - Evaporator  
❑ Evaporator in front heater and air conditioning unit (installed under dash panel)  
32  
Rep. gr.87 - Air conditioning system  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
10 - Service connection, low-pressure side  
❑ With sealing cap  
11 - Reservoir  
❑ With desiccant cartridge  
1.1.3  
System overview - refrigerant circuit  
with electrically driven air conditioner  
compressor (with and without battery  
cooling module)  
Note  
lk  
♦ The arrows indicate the direction of coolant flow.  
♦ The following diagram shows an example of a refrigerant cir‐  
cuit with expansion valve and second evaporator for battery  
cooling and one internal heat exchanger.  
♦ The layout of the refrigerant circuit is specific to the vehicle ⇒  
Heating, air conditioning system; Rep. gr. 87 ; Refrigerant cir‐  
cuit (vehicle-specific workshop manual).  
HD = High-pressure side  
ND = Low-pressure side  
1. Refrigerant circuit  
33  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
1 - Electrical air conditioner  
compressor  
❑ With control unit for air  
conditioner compressor  
- J842- and electrical air  
conditioner compressor  
- V470- ⇒ Heating, air  
conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
2 - High-pressure safety valve  
3 - Condenser  
❑ With receiver and desic‐  
cant cartridge.  
4 - Receiver  
❑ Part of condenser in this  
case.  
5 - Refrigerant pressure send‐  
er  
❑ Vehicle-specific ver‐  
sions ⇒ Heating, air  
conditioning system;  
Rep. gr. 87 ; Refrigerant  
circuit (vehicle-specific  
workshop manual).  
6 - Service connection, high-  
pressure side  
❑ With sealing cap.  
7 - Refrigerant line with internal  
heat exchanger  
8 - Refrigerant shut-off valve  
❑ Different designations  
⇒ Heating, air condi‐  
tioning system; Rep. gr. 87 ; Refrigerant circuit (vehicle-specific workshop manual).  
❑ Only on vehicles with battery cooling module for hybrid battery unit - AX1-  
Note  
The refrigerant shut-off valve is ac‐  
tuated e.g. if battery cooling is nec‐  
essary and no cooling of the pas‐  
senger compartment is required  
(open when not actuated).  
9 - Expansion valve  
❑ On evaporator in heater and air conditioning unit  
10 - Front evaporator  
❑ Evaporator in heater and air conditioning unit  
11 - -Expansion valve with shut-off valve-  
❑ Different designations ⇒ Heating, air conditioning system; Rep. gr. 87 ; Refrigerant circuit (vehicle-  
specific workshop manual).  
❑ On evaporator in battery cooling module  
❑ Only on vehicles with battery cooling module for hybrid battery unit - AX1-  
34  
Rep. gr.87 - Air conditioning system  
Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...  
Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017  
Note  
The -expansion valve with shut-off  
valve- is actuated if battery cooling  
is necessary (closed when not actu‐  
ated).  
12 - Evaporator  
❑ Evaporator in battery cooling module  
❑ Only on vehicles with battery cooling module for hybrid battery unit - AX1-  
13 - Service connection, low-pressure side  
❑ With sealing cap  
lk  
1. Refrigerant circuit  
35  

Related Topics

Air conditioning system
1 Refrigerant circuit 1.2 General description - components of refrigerant circuit 1.3 Possible complaints 1.4 Investigating leaks 1.5 Renewing components 1.6 Cleaning refrigerant circuit 1.7 Checking pressures with pressure gauge 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 2.14 Checking pressures 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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