Get Air conditioning system -> 1.5.6 Renewing desiccant cartridge / receiver after cleaning refrigerant circuit 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

All vehicles

Note

♦ Then pour new refrigerant oil in the air conditioner compressor

in a volume that equates to the refrigerant oil in the replace‐

ment compressor * ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigerant oil .

♦ Different refrigerant oil and volumes for different air condition‐

er compressors ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigerant oil .

♦ To ensure proper lubrication of the air conditioner compressor

when it runs for the first time, the air conditioner compressor

must be filled with at least 40 cm³of refrigerant oil; the re‐

mainder can be poured e.g. into the new reservoir or receiver

or a refrigerant line ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data; refrigerant oil .

♦ If dirt enters the air conditioner compressor whilst the refrig‐

erant circuit is open (e.g. after an accident), the air conditioner

compressor is to be renewed ⇒ Heating, air conditioning; Rep.

gr. 87 ; Air conditioner compressor .

♦ Clean the refrigerant circuit (flush with R1234yf refrigerant) *

⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

– Renew desiccant cartridge and receiver ⇒ Heating, air con‐

ditioning; Rep. gr. 87 ; Refrigerant circuit; System overview -

refrigerant circuit .

– Assemble the refrigerant circuit, evacuate and refill

⇒ page 129 .

1.5.3

Renewing leaking or damaged compo‐

nents of charged refrigerant circuit

(apart from air conditioner compressor

and receiver)

There is still refrigerant in the refrigerant circuit (e.g. the leak is

small)

♦ Observe the general information about renewing components

⇒ “1.5.1 General information about renewing components”,

page 79

– Drain refrigerant circuit ⇒ page 129 .

– Remove the defective part, blow through with compressed air

and collect any escaping refrigerant oil.

–

The refrigerant oil that is blown out (plus 20 cm for the evap‐

orator, plus 10 cm for the condenser, refrigerant lines and

refrigerant hoses) should be poured into the new component

as fresh refrigerant oil.

Note

Dispose of old refrigerant oil (observing local regulations) ⇒ VW /

Audi ServiceNet .

– Assemble the refrigerant circuit, evacuate and charge

⇒ page 129 .

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

1.5.4

Renewing air conditioner compressor

with no need to clean refrigerant circuit

Note

Clean the refrigerant circuit. In other words, flush with R1234yf

refrigerant ⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

♦ Observe the general information about renewing components

⇒ “1.5.1 General information about renewing components”,

page 79

For example with external damage from an accident

– Drain refrigerant circuit

⇒ “1.6 Cleaning refrigerant circuit”, page 92 .

– Remove air conditioner compressor ⇒ Heating, air condition‐

ing; Rep. gr. 87 ; Air conditioner compressor .

Electrical air conditioner compressor

– Flush the defective electrical air conditioning compressor to

remove the refrigerant oil (make a note of the volume of re‐

frigerant oil flushed out)

⇒ “2.11 Cleaning electrical air conditioning compressor”, page

155 .

Note

♦ If the volume of refrigerant oil flushed out of the defective air

conditioner compressor is more than 75% of that in the re‐

placement air conditioner compressor, do not flush the re‐

placement air conditioner compressor (a residual amount

always remains in the air conditioner compressor, which

means that the amount of refrigerant oil in the refrigerant circuit

is negligible).

♦ If less than 75% of the specified amount of refrigerant oil is

flushed out of the defective air conditioner compressor, the

remaining amount is still in the components of the refrigerant

circuit. To prevent the system from being overfilled with refrig‐

erant oil, the refrigerant circuit or the electrical air conditioning

compressor is to be flushed.

– Flush the refrigerant circuit or new electrical air conditioning

compressor to remove the refrigerant oil

⇒ “1.6 Cleaning refrigerant circuit”, page 92 and

⇒ “2.11 Cleaning electrical air conditioning compressor”, page

155 .

– Dispose of refrigerant oil flushed out of defective and new air

conditioner compressor / refrigerant circuit ⇒ VW / Audi Serv‐

iceNet (observe local regulations).

Note

The design of the electrical air conditioning compressor is such

that flushing is a requisite to remove the refrigerant oil (the refrig‐

erant oil cannot be poured out as is the case with mechanical air

conditioning compressors with oil drain plug)

⇒ “1.5.2 Renewing leaking or damaged components of empty re‐

frigerant circuit (apart from air conditioner compressor and re‐

ceiver)”, page 81 .

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

– Only fill the replacement air conditioner compressor with fresh

refrigerant oil equivalent to volume of oil that was flushed out

(from the defective air conditioner compressor).

Note

If for instance 70 cm³refrigerant oil was poured out of the de‐

♦

fective air conditioner compressor, and 140 cm³oil was pour‐

ed out of the replacement air conditioner compressor (a small

quantity of refrigerant oil remains in the air conditioner com‐

pressor and potentially in the air conditioner service station ).

The air conditioner compressor to be installed must be filled

in this instance with 70 cm³of refrigerant oil (the refrigerant oil

flushed out of the replacement air conditioner compressor

must not be used as it may have been contaminated in the air

conditioner service station ).

♦ Different refrigerant oils and volumes for different air condi‐

tioner compressors ⇒ Heating, air conditioning; Rep. gr. 00 ;

Technical data .

♦ If quite a large amount of refrigerant oil was flushed out of the

defective air conditioner compressor (more than approx.

40 cm ³), the remaining refrigerant oil can also be poured in

the evaporator, a refrigerant line or the reservoir/receiver/inner

heat exchanger ⇒ Heating, air conditioning; Rep. gr. 87 ; Re‐

frigerant circuit; System overview - refrigerant circuit , ⇒

Heating, air conditioning; Rep. gr. 00 ; Technical data .

Mechanical air conditioner compressor

– Remove oil drain plug from air conditioner compressor ⇒

Heating, air conditioning; Rep. gr. 87 ; Refrigerant circuit;

System overview - refrigerant circuit .

Note

Different versions of oil drain plug and corresponding seal (either

a seal or an O-ring may be installed, renew)

⇒ “1.5.2 Renewing leaking or damaged components of empty re‐

frigerant circuit (apart from air conditioner compressor and re‐

ceiver)”, page 81 and ⇒ Electronic parts catalogue .

– To speed up draining of the refrigerant oil, rotate the shaft of

the air conditioner compressor using e.g. the magnetic clutch

pulley.

– Pour out old refrigerant oil from the air conditioner compressor

and dispose ⇒ VW / Audi-ServiceNet (observe local regula‐

tions).

– Remove oil drain screw from replacement air conditioner com‐

pressor, pour out refrigerant oil and replace it with only the

quantity of fresh refrigerant oil equal to the amount of refrig‐

erant oil poured out of the defective air conditioner compressor

⇒ “1.5.2 Renewing leaking or damaged components of empty

refrigerant circuit (apart from air conditioner compressor and

receiver)”, page 81 .

Rep. gr.87 - Air conditioning system

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Air conditioning system -> 1.5.6 Renewing desiccant cartridge / receiver after cleaning refrigerant circuit for Your Volkswagen Touran 4 Door Second Generation (2015-2022)

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