Get Air conditioning system -> 1.2.18 Non-return valves 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

1.2.18

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.

Rep. gr.87 - Air conditioning system

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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

1.2.19

Quick-release coupling connections in

refrigerant circuit

Service connections with Schrader valve (needle valve or push

pin)

♦ Only valves and connections resistant to R1234yf refrigerant

and the related refrigerant oils may be used.

♦ Service connections -C- and -F- in an R1234yf refrigerant cir‐

cuit are configured in such a way that service couplings cannot

be connected to service connections designed for an R134a

refrigerant circuit.

♦ Different connections (external diameter) for high pressure

and low pressure side -C- and -F-.

♦ Before removing the valves or valve inserts -B- and -E-, empty

the refrigerant circuit.

♦ Always screw on sealing caps -A- and -D- with seal -G-.

Layout in vehicle ⇒ Heating, air conditioning; Rep. gr. 87 ; Re‐

frigerant circuit (vehicle-specific workshop manual).

– Extract refrigerant before unscrewing the valves.

♦ Service connection, low pressure side -F-

♦ Service connection, high pressure side -C-

♦ Valve insert (designation: Schrader or needle valve)

♦ Sealing cap for service connection on low pressure side with

seal -A-

♦ Sealing cap for service connection on high pressure side with

seal -D-

1. Refrigerant circuit

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Air conditioning system -> 1.2.18 Non-return valves for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

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