A/C Unit Installation Note

When replacing the A/C unit or evaporator, add compressor oil to the refrigerant cycle.
Supplemental oil amount (approx. quantity)

25 ml {25 cc, 0.8 fl oz}
Tighten it to the right so that it is flush to the contact surface.

Fig 1: Identifying Tightening Direction Of A/C Unit Nut
Courtesy of MAZDA MOTORS CORP.