Safety Precautions When Handling Refrigerant

Risk of asphyxiation and poisoning from the refrigerant 

Dry coughing and nausea due to suffocation and poisoning is possible due to refrigerant fumes.

-- Never breathe in refrigerant fumes.

-- Only perform procedures on the refrigerant circuit in well ventilated areas and store in refrigerant container.

-- Never perform procedures in and near basement staircases or other below ground areas.

-- Switch on the exhaust extracting system.

There is a risk of getting frostbite from the refrigerant. 

Refrigerant can come out under pressure when working on the A/C system. Frostbite on the skin and other parts of the body is possible.

-- Wear safety gloves.

-- Wear protective eyewear.

-- Extract refrigerant and open the refrigerant circuit immediately.

-- If more than 10 minutes elapse after extracting the refrigerant and the refrigerant circuit was not opened, extract the refrigerant again. Pressure can develop in the refrigerant circuit due to evaporation.