Air conditioning (General precautions): Adjustments

GENERAL PRECAUTIONS

The refrigerant used in the air conditioning system is HFC (Hydrofluorocarbon) R134a.

WARNING:

• R134a is a hazardous liquid and when handled incorrectly can cause serious injury. Suitable protective clothing must be worn when carrying out service operations on the air conditioning system.
• Do not allow a refrigerant container to be heated by direct flame or to be placed near any heating appliance. A refrigerant container must not be heated above 50°C.
• Do not leave a container of refrigerant without its cap fitted. Do not transport a container of refrigerant that is unrestrained, especially in the boot of a car.
• R134a is odourless and colourless. Do not handle or discharge in an enclosed area, or any area where the vapour and liquid can come in contact with a naked flame or hot metal. R134a is not flammable but can cause a highly toxic gas.
• Do not smoke or weld in areas where R134a is in use. Inhalation of concentrations of vapour can cause dizziness, disorientation, narcosis, nausea or vomiting.
• Do not allow fluids other than R134a or compressor lubricant to enter the air conditioning system. Spontaneous combustion may occur.
• R134a splashed on any part of the body will cause immediate freezing of that area. Also refrigerant cylinders and replenishment trolleys when discharging will freeze skin to them if contact is made.
• The refrigerant used in an air conditioning system must be reclaimed in accordance with the recommendations given by a Refrigerant Recovery Recycling Recharging Station.

NOTE: Suitable protective clothing comprises: Wrap round safety glasses or helmet, heat proof gloves, rubber apron, or waterproof overalls and rubber boots.

REMEDIAL ACTIONS

1. If liquid R134a strikes the eye, do not rub it. Gently run large quantities of eye wash off it to raise the temperature. If eye wash is not available, cool, clean water may be used. Cover eye with a clean pad and seek immediate medical attention.
2. If liquid R134a is splashed on the skin run large quantities of water over the area as soon as possible to raise the temperature. Carry out the same action if the skin comes in contact with discharging cylinders. Wrap effected parts in blankets or similar material and seek immediate medical attention.
3. If suspected of being overcome by inhalation of R134a vapour seek fresh air. If a person overcome by inhalation is unconscious move them to fresh air, apply artificial respiration and/or oxygen and seek immediate medical attention.

NOTE: Due to its low evaporating temperature of -26.1°C, R134a should be handled with care.