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When Handling Refrigerant

NOTE:
  • Some of the practices, techniques and procedures, as well as the information, tools and equipment which have been commonly used in mobile air conditioning system diagnosis and service of R-12 and R-134a are different for A/C systems using R-1234yf.

    Modifications and adjustments have to be made based on the individual characteristics of each refrigerant. No technician may perform service or repair on a mobile air conditioning system using R-1234yf without being trained for the refrigerant being handled. Under the SAE Standard J2845 the refrigerant system should only be serviced by trained and certified technicians to insure proper and safe operation.

  • Service technicians should always wear proper personal protective equipment while handling/servicing systems that contain any refrigerant.
  • Service technicians shall read and follow the appropriate Material Safety Data Sheets (MSDS), which provide information on safety and the proper personal protective equipment to use.
    • All contact with liquid or gaseous refrigerant shall be avoided.
    • Goggles with side protection and gloves (insulated against heat loss and impermeable to refrigerant) shall be worn while working with the refrigerant circuit.
    • Exposure of the skin to refrigerant may result in frostbite, in which case rub affected area with lukewarm water. A physician shall be consulted immediately regarding the affected skin areas.
  • A physician shall be consulted immediately in the event of complaints following exposure to high refrigerant concentrations. Complaint symptoms may include: increased breathing rate, breathlessness, headache, accelerated pulse, dizziness.
  • Avoid breathing A/C refrigerant and lubricant vapor or mist. To remove refrigerant from the A/C system, use service equipment designed for recovery of that refrigerant which is certified to meet the requirements of the appropriate SAE Standards.
  1. R-1234yf liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves.
  2. It is standard practice to wear goggles or glasses to protect your eyes, and gloves to protect your hands. If the refrigerant splashes into your eyes, wash them with clean water immediately.
  3. The R-1234yf container is highly pressurized. Never leave it in a hot place, and check storage temperature is below 52°C (125°F).
  4. An electronic leak detector should be used to check the system for refrigerant leakage. Bear in mind that the R-1234yf, upon coming into contact with flame, produces phosgene, a highly toxic gas.
  5. Use only recommended lubricant for R-1234yf systems. If lubricants other than the recommended one used, system failure may occur.
  6. PAG lubricant absorbs moisture from the atmosphere at a rapid rate, therefore the following precautions must be observed:
    • When removing refrigerant components from a vehicle, cap the components immediately to prevent entry of moisture.
    • When installing refrigerant components to a vehicle, do not remove the cap until just before connecting the components.
    • Complete the connection of all refrigerant tubes and hoses without delay to prevent the A/C system from taking on moisture.
    • Use the recommended lubricant from a sealed container only.
  7. If an accidental discharge in the system occurs, ventilate the work area before resume of service.
  8. Clean all dirt, grease and debris from and around connection joints before servicing and disassembly of refrigerant connections.
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