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Air conditioning systems with refrigerant R1234yf - General information - Edition 07.2017
Note
♦ Do not store refrigerant oils open to the atmosphere as they
are very hygroscopic (they readily absorb water).
♦ Always keep the refrigerant oil container and the refrigerant
circuit sealed.
♦ Do not use ester oils (POE oils) as these are currently only
compatible with larger systems under different operating con‐
ditions (not suitable for motor vehicle air conditioning sys‐
tems).
3.4
Handling pressurised tanks/containers
Keep containers tightly sealed in a well ventilated, cool location.
Refrigerant is heavier than air. Should gas escape from a system,
it collects at ground level in particular.
Protect against heat and direct sunlight, do not keep in areas with
temperatures higher than 50°C.
Do not keep 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.
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Smoking is forbidden in areas in which R1234yf refrigerant is
kept. Also take measures to prevent electrostatic discharge.
Secure containers to prevent them falling over.
Secure upright cylinders to stop them falling over and cylinders
lying flat to stop them rolling away.
Containers must never be thrown.
If they should fall, the containers may become severely deformed
and break open. The refrigerant evaporates immediately, liberat‐
ing considerable force. Flying fragments of cylinders can cause
severe injuries.
To protect cylinder valves, cylinders are only to be transported
with a protective cap screwed on.
Valves may break off if cylinders are not properly transported.
Do not place 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 not heat up above 50°C
To mitigate any risk, the pressure vessel regulations stipulate that
tanks/containers must not be heated up above 50°C.
Do not expose to uncontrolled heat
Do not heat with a naked flame under any circumstances. The
local overheating that will result can change the structure of the
container's materials, thereby reducing the safe maximum pres‐
sure limit of the container. There is also a danger of the refrigerant
decomposing due to localised overheating.
Seal empty tanks/containers
Empty refrigerant tanks/containers must always be closed to pre‐
vent the ingress of moisture. Moisture causes steel tanks/con‐
tainers to rust. Rust weakens the tank/container walls. In addition,
3. Repair notes
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