Refrigerant R-134a is a transparent, colorless compound, both in liquid and gaseous states. The temperature point of transition to the gaseous state for this refrigerant at atmospheric pressure is -29.8'C. Thus, under conditions of normal temperature and normal pressure, the substance is in a gaseous state. This gas is heavier than air, it is not flammable or explosive.
When handling R-134a refrigerant, the following key points should be taken into account.
Attention:
- Always wear safety glasses to protect your eyes when performing repairs and maintenance on the air conditioning system.
- At normal temperature and pressure, R-134a refrigerant evaporates quickly, and R-134a refrigerant also freezes objects when in contact with them.
- Therefore, you need to be careful when working with it. Avoid contact of liquid refrigerant with exposed skin, especially eyes. Always wear safety glasses to protect your eyes when working with refrigerant. Before working on the air conditioning system, prepare a bottle of aseptic mineral oil. If liquid refrigerant gets into your eyes, apply mineral oil to remove the refrigerant, as R-134a is quickly absorbed by oil. Also, rinse your eyes with plenty of cool water. After treatment, seek medical attention immediately to avoid eye inflammation.
- Do not allow R-134a refrigerant to heat up to temperatures above 40°C.
- When charging or adding refrigerant, it is necessary to ensure the appropriate temperature so that the refrigerant pressure in the container is higher than the refrigerant pressure in the air conditioning system.
- The refrigerant container must be completely heated in a vessel or large basin with warm water at a temperature of up to 40°C. Do not heat the container with a blowtorch or other methods that lead to a sharp increase in temperature and pressure in the container, so as not to exceed the specified temperature. Do not weld or steam clean surfaces near air conditioning system parts or pipes.
- Keep the filling container vertical while filling the air conditioning system. Keep the filling container vertical while filling the air conditioning system. If the filling container is placed horizontally or upside down, liquid refrigerant under pressure may enter the compressor, which may cause damage to the compressor.
- Use a special device to check for R-134a refrigerant leaks from the system.
- Avoid contact of refrigerant with polished or treated metal surfaces. When refrigerant comes into contact with polished and treated metal surfaces, including chromed steel, it will stain these surfaces and, when mixed with moisture, the refrigerant will have a strong corrosive effect on any metal surface.
The article was obtained from this portal: MitsubishiMan