Daikin VRV II Series Design, Installation & Testing Instructions page 177

Si39-303
<Cautions for installation of multiple outdoor units>
1. The piping between the outdoor units must be routed level or slightly upward to avoid the
Installation Manual
risk of oil detention to the piping side.
Pattern 1
Pattern 2
Prohibited pattern
to indoor unit
Piping between outdoor units
to indoor unit
Piping between outdoor units
to indoor unit
to indoor unit
Change to pattern 1 or pattern 2
Downward inclination
to indoor unit
to indoor unit
Downward inclination
Refrigerant Piping
Oil remains in piping
171