Safety Precautions For When Working On Vehicles With Air Conditioning And When Handling; Refrigerant R134A - Volkswagen Amarok 2011 Workshop Manual

Amarok 2011 ➤ , Beetle 2012 ➤ , Bora 1999 ➤ , CC 2010 ➤ , CC 2012 ➤ , ...
1.11 Safety precautions for when working on
vehicles with air conditioning and when
handling refrigerant R134a
Air conditioning service station - VAS 6007A- (and further service
stations currently available)
⇒ Workshop equipment
WARNING
♦ It is recommended that a bottle containing water be kept
at hand for purging out the eyes.
♦ Should liquid refrigerant get into the eyes, thoroughly
purge the eyes with water for about 15 minutes. Then ad‐
minister eye drops and visit a doctor immediately even if
the eyes do not hurt.
♦ The doctor must be informed that the frostbite has been
caused by refrigerant R134a. If, in spite of these safety
measures, refrigerant comes into contact with other body
parts, these areas must also be immediately purge with
cold water for at least 15 minutes.
♦ Work on the air conditioning system refrigerant circuit in
well ventilated rooms only. Switch on exhaust gas fume
extractor (if there is one).
♦ Refrigerant must not be stored in low-lying rooms (e.g.
cellars) or their stairways or window shafts.
• Do not weld, braze or soft-solder any parts of the charged air
conditioning system. This also applies to welding and solder‐
ing work on the vehicle when the danger exists that parts of
the air conditioning system may heat up. During painting op‐
erations, temperatures of objects in the drying oven or in its
pre-heating zone must not exceed 80°C.
Reason:
Heating causes great excess pressure to develop in the system,
which can cause the pressure release valve of the system to
open.
Precautions:
– Use the air conditioner service station to evacuate the refrig‐
erant circuit.
Note
Damaged or leaking components of the air conditioning system
must not be repaired by welding or soldering. They must always
be renewed.
Refrigerant containers (e.g. charging cylinders of air conditioner
service station) must never be subjected to excessive heat or ex‐
posed to direct sunlight.
Precautions:
– Never charge a container completely with liquid refrigerant.
Without sufficient expansion space (gas cushion), the con‐
tainer will burst should the temperature rise, with devastating
consequences ⇒ page 5
Air conditioning system with refrigerant R134a - Edition 10.2014
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1. General notes on air conditioning systems
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