Acura NSX 1991 Manual page 727

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Charging
Only use service equipment that is U.L.-listed and is
certified to meet the requirements of SAE J2210 to
remove HFC-134a (R-134a) from the air conditioner
system.
CAUTION: Exposure to air conditioner refrigerant
and lubricant vapor or mist can irritate eyes, nose
and throat.
Avoid breathing the air conditioner refrigerant and
lubricant vapor or mist.
If accidental system discharge occurs, ventilate work
area before resuming service. Additional health and safe-
ty information may be obtained from the refrigerant and
lubricant manufacturers.
Refrigerant capacity: 800-850 g (28-30 oz)
CAUTION: Do not overcharge the system; the
compressor will be damaged.
Connect a R-134a refrigerant Recovery/Recycl-
ing/Charging System to the car as shown follow the
equipment manufacturer's instructions.
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Recovery/Recycling/Charging System