Get Air conditioning system -> 1.2.14 Quick release couplings of refrigerant lines Guide for 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

1.2.13

Refrigerant line with internal heat ex‐

changer

♦ In this refrigerant line, the warm liquid refrigerant flowing on

the high pressure side supplies energy to the cold refrigerant

gas or vapour flowing on the low pressure side, thus enhanc‐

ing the efficiency of the air conditioner.

Note

This illustration shows a refrigerant line with inner heat exchanger

as fitted e.g. on the Golf 7, Audi A4 2008 > and Audi A5 Coupé

2008 > ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant

circuit .

A - Refrigerant line with internal heat exchanger

B - Channels in the refrigerant line along which hot liquid refrig‐

erant flows to the evaporator (high pressure side of refrigerant

circuit).

C - Channel in the refrigerant line through which the cold gaseous

or vaporous refrigerant flows to the air conditioner compressor

(low pressure side of refrigerant circuit).

1.2.14

Quick release couplings of refrigerant

lines

Note

♦ This illustration shows the quick-release couplings with a re‐

frigerant line with internal heat exchanger as fitted e.g. on the

Audi A4 2008 > and the Audi A5 Coupé 2008 > ⇒ Heating, air

conditioning; Rep. gr. 87 ; Refrigerant circuit (vehicle-specific

workshop manual).

♦ Removal of the refrigerant line -D- involves opening the re‐

taining ring -A- e.g. with the refrigerant line release tool ( re‐

lease tool - T40149- or removal tool - T40232- ) ⇒ Heating,

air conditioning; Rep. gr. 87 ; Refrigerant circuit (vehicle-spe‐

cific workshop manual).

♦ After removing the respective refrigerant line, the quick re‐

lease couplings -B- and -G- are to be renewed along with the

associated support ring -E- or -H- and the associated seal

-F- or -J- ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant

circuit (vehicle-specific workshop manual) and ⇒ Electronic

parts catalogue .

A - Retaining ring (in quick release coupling on high pressure

side)

B - Quick release coupling with retaining ring “high pressure side”

C - Refrigerant line with internal heat exchanger

D - Refrigerant line “high pressure side”

E - Support ring “high pressure side”

F - Seal “high pressure side”

G - Quick release coupling with retaining ring “low pressure side”

H - Support ring “low pressure side”

J - Seal “low pressure side”

1. Refrigerant circuit

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Arteon 2018 ➤ , Atlas 2017 ➤ , CC 2012 ➤ , Caddy 2016 ➤ , Crafter 201 ...

Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017

Note

♦ The quick release couplings come in different versions -A- and

-D-. On both versions of these quick release couplings, the

refrigerant lines -C- can be released and removed in the same

way, e.g. with refrigerant line release tool -T40149/1- ⇒ Heat‐

ing, air conditioning; Rep. gr. 87 ; Refrigerant circuit (vehicle-

specific workshop manual).

♦ For quick release coupling version -A-, the control pins -B- be‐

come visible after installing the refrigerant line -C- once the

engaged refrigerant line -C- is pulled in the direction of arrow.

♦ For quick release coupling version -D-, the refrigerant line

-C- is installed in the same way as quick release coupling

-A-. When the refrigerant line -C- on this version is pulled in

the direction of arrow following assembly, the snap ring -E-

protrudes from the quick release coupling -D-, thereby indi‐

cating that the retaining ring -F- is completely engaged with

the refrigerant line -C-. The snap ring -E- must then be re‐

moved from the refrigerant line -C-.

1.2.15

Seals

♦ These seals seal the connection points between the individual

components of the refrigerant circuit

⇒ “3.2 Refrigerant circuit seals”, page 8 .

1.2.16

Pipes and hoses in refrigerant circuit

♦ In its pure state, R1234yf refrigerant is chemically stable and

has no corrosive effect on e.g. iron, aluminium and specially

developed plastics that are suitable for this purpose. A mixture

of refrigerant oil and R1234yf refrigerant can affect certain

metals (e.g. alloys with copper) and affect or degrade certain

hose materials and plastics. Therefore, use only genuine re‐

placement parts ⇒ Electronic parts catalogue .

♦ Only use components that are resistant to R1234yf refrigerant

and its associated refrigerant oils. Do not use components

(such as seals and hoses, which are made of plastic) that

cannot be clearly allocated ⇒ Electronic parts catalogue .

♦ The pipes and hoses are held together by threaded connec‐

tions and / or special joints ⇒ Heating, air conditioning; Rep.

gr. 87 ; Refrigerant circuit (vehicle-specific workshop manual).

♦ Renew the sealing elements (e.g. seals) between the compo‐

nents ⇒ Electronic parts catalogue .

♦ For threaded connections, observe the specified torque set‐

tings. For pressure-fit connections, use dedicated release

tools ⇒ Heating, air conditioning; Rep. gr. 87 ; Refrigerant

circuit (vehicle-specific workshop manual).

Rep. gr.87 - Air conditioning system

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Air conditioning system -> 1.2.14 Quick release couplings of refrigerant lines for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

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