Get Technical data Repair notes -> 3.3 Refrigerant and refrigerant oil Guide for Volkswagen Sharan VAN Second Generation (2010-2023)

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

3.3

Refrigeranand refrigeranoil

⇒ “3.3.1 Importanrepair instructions for refrigeranand refriger‐

anoil”, page 9

⇒ “3.3.2 Refrigeranoil”, page 9

3.3.1

Importanrepair instructions for refriger‐

anand refrigeranoil

•

An air conditioner designed for R1234yf refrigeranmusnever

be charged with R134a refrigerant.

An air conditioner designed for R134a refrigeranmusnever

be charged with R1234yf refrigerant.

The refrigeranoils especially developed for refrigerancircuits

with R1234yf and R134a refrigeranmay nobe used in a re‐

frigerancircuicharged with a differenrefrigeranunless the

relevanpermissions have been granted ⇒ Electronic parts

catalogue and ⇒ Heating, air conditioning system; Rep. gr.

00 ; Technical data; refrigeranoil .

•

Air conditioner service stations which come in contacwith re‐

frigeranmay only be used for the tar refrigerant.

A label -A- is attached in the engine compartmento the lock

carrier or the plenum chamber to provide information on the

refrigeranused.

•

Differenrefrigerants musnever be mixed.

Depending on the type and production period, imay also in‐

dicate the GWP for the refrigeranused.

•

To ensure thaonly R1234yf refrigeranwith a certain purity

level is drawn into the air conditioner service station (R1234yf),

a gas analysis musbe performed before the refrigerancircui

is emptied

⇒ “2.3 Performing gas analysis of refrigerant”, page 134 .

Note

If, during the gas analysis, iis found thathe R1234yf refrigeran

is contaminated with a differengas, imusbe extracted from the

refrigerancircuiand analysed, processed or disposed of as gas

of unknown composition in accordance with the legal require‐

ments ⇒ VW / Audi ServiceNe,

⇒ “2.3 Performing gas analysis of refrigerant”, page 134 and

⇒ “6.2.17 Returning contaminated R1234yf refrigeranfor analy‐

sis, processing or disposal”, page 25 .

3.3.2

Refrigeranoil

CAUTION

Risk of chemical burns from atomised refrigeranoil. Eyes and

other parts of the body could be injured.

– Wear protective gloves.

– Wear protective goggles.

– Never inhale atomised refrigeranoil.

♦ Refrigerant oil mixes with the refrigeran(abou10 to 40%,

depending on compressor type and amounof refrigerant) and

circulates constantly in the system, lubricating the moving

parts.

3. Repair notes

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Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

♦ Special synthetic refrigeranmachine oils such as polyalky‐

lene glycol (PAG) oil with certain additives adapted to the

refrigeranoil are used in conjunction with R1234yf air condi‐

tioning systems. This is necessary because e.g. mineral oil

does nomix with R1234yf and, should the additives be miss‐

ing, undesired reactions with the refrigeranor components of

the refrigerancircuicould occur. In addition, the components

of the R1234yf air conditioning system could be attacked if the

mixture circulated within the refrigerancircuiunder pressure

and ahigh temperatures, or the lubricanfilm in the air con‐

ditioner compressor broke down. The use of non-approved

oils can lead to failure of the air conditioning system. There‐

fore, use only approved refrigeranoils ⇒ Electronic parts

catalogue .

♦ Type of oil for R1234yf refrigeranin motor vehicles: PAG oil

with specific additives adapted to R1234yf refrigeran(polyal‐

kylene glycol with certain additives).

♦ The mosimportanproperties are high solubility with refriger‐

ant, good lubricating quality, absence of acid and low water

content. For this reason, only very specific oils may be used.

Lisof approved refrigeranoils and capacities ⇒ Electronic

parts catalogue and ⇒ Heating, air conditioning system; Rep.

gr. 00 ; Technical data (vehicle-specific workshop manual).

♦ The PAG oils suitable for refrigeranR1234yf are heavily hy‐

groscopic and cannoalways be mixed with other oils. There‐

fore, only use approved refrigeranoils.

♦ Moisture and acids promote ageing of refrigeranoil, causing

ito become dark, viscous and aggressive towards metals.

Containers for refrigeranoil should therefore be kepclosed

to preventhe ingress of moisture. When containers are

opened, they should be closed again immediately.

♦ Due to its chemical properties, refrigeranoil musnobe dis‐

posed of toher with engine oil or gear oil. Refrigeranoil is

to be disposed of as waste oil of unknown origin (observe local

regulations) ⇒ VW / Audi ServiceNe.

♦ For refrigerancircuits with R1234yf refrigerancircuit, only

approved oils may be used for this refrigeranand the air con‐

ditioner compressor installed in the system ⇒ Electronic parts

catalogue and ⇒ Heating, air conditioning system; Rep. gr.

00 ; Technical data .

♦ Refrigerant oil thawas developed for R134a refrigeranis no

suitable for refrigerancircuits with R1234yf refrigeran(as i

is missing specific additives). Therefore, ensure thathe cor‐

rectype is used ⇒ Electronic parts catalogue and ⇒ Heating,

air conditioning system; Rep. gr. 00 ; Technical data; Refrig‐

eranoil .

♦ Refrigerant oil thawas developed for R1234yf refrigeran

could also be suitable for use in refrigerancircuits with R134a

refrigerant. Observe notes ⇒ Electronic parts catalogue and

⇒ Heating, air conditioning system; Rep. gr. 00 ; Technical

data (vehicle-specific workshop manual).

Note

♦ The cylinder in which the refrigeranoil is supplied has a label

from which the expiry date of the refrigeranoil can be gleaned.

♦ This expiry date is nocritical if the cylinder is sealed tight.

♦ Refrigeranoil from a tightly sealed cylinder can also be used

after the expiry date specified on the cylinder.

Rep. gr.00 - Technical data

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

Air conditioning systems with refrigeranR1234yf - General information - Edition 07.2017

Note

♦ Do nostore refrigeranoils open to the atmosphere as they

are very hygroscopic (they readily absorb water).

♦ Always keep the refrigeranoil container and the refrigeran

circuisealed.

♦ Do nouse ester oils (POE oils) as these are currently only

compatible with larger systems under differenoperating con‐

ditions (nosuitable for motor vehicle air conditioning sys‐

tems).

3.4

Handling pressurised tanks/containers

Keep containers tightly sealed in a well ventilated, cool location.

Refrigeranis heavier than air. Should gas escape from a system,

icollects aground level in particular.

Protecagainsheaand direcsunlight, do nokeep in areas with

temperatures higher than 50°C.

Do nokeep in or near cellars or other low lying areas.

Only keep in areas with an adequate flow of air.

Keep containers away from sources of ignition.

Smoking is forbidden in areas in which R1234yf refrigeranis

kept. Also take measures to prevenelectrostatic discharge.

Secure containers to preventhem falling over.

Secure uprighcylinders to stop them falling over and cylinders

lying flato stop them rolling away.

Containers musnever be thrown.

If they should fall, the containers may become severely deformed

and break open. The refrigeranevaporates immediately, liberat‐

ing considerable force. Flying fragments of cylinders can cause

severe injuries.

To proteccylinder valves, cylinders are only to be transported

with a protective cap screwed on.

Valves may break off if cylinders are noproperly transported.

Do noplace near radiators!

High temperatures can occur near radiators. High temperatures

are also associated with high pressures and the maximum per‐

missible tank pressure may be exceeded.

Do noheaup above 50°C

To mitigate any risk, the pressure vessel regulations stipulate tha

tanks/containers musnobe heated up above 50°C.

Do noexpose to uncontrolled hea

Do noheawith a naked flame under any circumstances. The

local overheating thawill resulcan change the structure of the

container's materials, thereby reducing the safe maximum pres‐

sure limiof the container. There is also a danger of the refrigeran

decomposing due to localised overheating.

Seal empty tanks/containers

Empty refrigerantanks/containers musalways be closed to pre‐

venthe ingress of moisture. Moisture causes steel tanks/con‐

tainers to rust. Rusweakens the tank/container walls. In addition,

3. Repair notes

Technical data Repair notes -> 3.3 Refrigerant and refrigerant oil for Your Volkswagen Sharan VAN Second Generation (2010-2023)

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