Honda Acura NSX 1991 Service Manual page 983

Charging Procedures
Refrigerant capacity: 900-950 g (32-34 02)
Always wear eye protection when
charging the system.
CAUTION: Do not overcharge the system; the
compressor will be damaged.
Attach an Air Conditioning Service Station as shown.
Follow the equipment manufacturer's instructions.
HIGH-SIDE ADAPTER
Kent-Moors: P/N J25499
ACT135