Mirage Sedan DE L4-1468cc 1.5L SOHC MFI (1997)
6.
If the refrigerant's pressure is higher than the limit shown for a given temperature, slowly vent the vapor from the top of the container into the
recovery/recycling unit. Continue until the pressure falls below the limit shown in the R12 or R134a chart. If the refrigerant is R134a and the
pressure still exceeds the limits shown in the chart, shake the container and let it stand for several minutes. If the pressure then falls below the
limits, it is OK to use as is. Should the pressure inside the container still exceed the pressure limit shown, recycle the entire contents.
System Flushing
Now that CFCs cannot legally be vented to the atmosphere, flushing compounds such as R11 and R113 are no longer viable for flushing systems. To
flush oil out of an R12 system when retrofitting for RI34a, you can use a recycling machine and liquid R12, which picks up the mineral oil used with R12
and takes it out. Do not use flammable solvents like mineral spirits or lacquer thinners. They are fire and explosion hazards.
Typical Cause of A/C System Contamination
Following are the most probable causes of contamination in automotive A/C systems:
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Mixing refrigerants
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Contaminated service equipment
Mixing Refrigerants
Under no circumstances should a system be charged with any refrigerant other than the refrigerant specified on the labels on the vehicle. To do so
contaminates the system and can cause damage to the system and the equipment. Damage may include compressor failure, damage to recycling
equipment, and transfer of contaminated refrigerant to other vehicles. If R12 and R134a are mixed, the mixture cannot be readily identified. Also,
increases in system pressure of as much as 25% can occur, resulting in performance degradation and possible system damage.
Contaminated Service Equipment
Service equipment must be used with only one refrigerant. Recycling equipment, hoses, gauges, and manifolds used for R134a systems cannot be used
for servicing R12 systems. A shop that services both R134a systems and R12 systems must have duplicate sets of equipment. The practice of flushing a
system with CFCs can no longer be continued because federal and local laws prohibit venting of CFCs into the atmosphere.
Disposing of Contaminated Refrigerant
