Heat Pump 60Hz (RXYQ5~54P) SiEN34-705
278 Installation Manual
4. Precautions when connecting piping between outdoor units (In case of multi system)
The Outdoor unit multi connection piping kit (sold separately) is needed to connect piping
between outdoor units in multi system. Only proceed with piping work after considering the
limitations on installation listed here and in “5. Branching the refrigerant piping”, always
referring to the kit’s installation manual.
(1) The piping between outdoor units must be installed level (Pattern 1) or with a rise
(Pattern 2). Otherwise oil may pool in the pipes.
Pattern 1
Pattern 2
Prohibited pattern
Change to pattern 1 or pattern 2
to indoor unit
to indoor unit
to indoor unit
to indoor unit
to indoor unit
to indoor unit
Piping between outdoor units
Piping between outdoor units
Downward inclination
Downward inclination
Oil remains in piping
Front connections
Side (bottom) connections
Front connections
Side (bottom) connections
Front connections
Side (bottom) connections
Level
Rise
Downward inclination
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