
The gases have no smell and may cause serious damage to the lungs already at low concentrations.
Refrigerant R134a may, if incorrectly handled, cause serious personal injuries as well as damage to the environment.
Therefore, great care must be taken in all work with air conditioning units! The rules given below may be a great help to
avoid injuries to all who come into contact with refrigerants.
In liquid form the refrigerant may cause:
Frostbite.
When in the form of a gas and at low concentration, the gas may:
Have some effect, especially on the nervous system.
When in the form of a gas and at high concentration it may:
Have an anaesthetic effect.
The air conditioning unit is pressurized and the refrigerant can unintentionally leak out. Never disconnect hoses or
remove the filler plug on the compressor.
If you suspect a leak, certified and trained personnel at a licensed workshop should be contacted for
troubleshooting and repair.
The refrigerant gas is heavier than air and will sink to the floor. Therefore, make sure that any escaped gas is
ventilated before work is started in any low-lying areas.
Smoking, welding or other open flames are not allowed in a workplace where work with refrigerant is in progress. The
refrigerant gas will then burn and form a toxic gas which is very dangerous to inhale. The gases formed when heating the
refrigerant have a pungent smell at high concentrations.
The symptoms may appear several hours (perhaps up to 24 hours) after exposure to the gases.
Action in case of accidents
Inhalation
If escape of gas is suspected, leave the area, try to find fresh air and move affected persons out of the danger area. Small
amounts of vapour from refrigerant R134a may have some effect especially on the nervous system. In large amounts, the
gas may have an anaesthetic effect. In serious cases, seek immediate medical attention.
Skin contact
In case of frostbite, flush with lukewarm water for a long time. If a large amount of liquid refrigerant comes into contact with
unprotected skin, the injured area should be carefully warmed with lukewarm water or warm clothes. Seek medical attention
immediately if symptoms persist.
Splash in eyes
Flush with warm water until the irritation ceases. Seek immediate medical attention.