MULTI/SINGLE
Indoor unit
8. Installation
42
Ceiling Concealed Duct - Middle Static Pressure
8.4.5 Ground drain piping
• It is standard work practice to make connections to the main pipe from above. The pipe down from the
combination should be as large as possible.
• The pipe work should be kept as short as possible and the number of indoor units per group kept to a minimum.
• Face the vent pipe opening facing downward to keep foreign matter from penetrating the system.
Face piping
downward
Vent pipe
Face the vent pipe opening facing downward to
keep foreign matter from penetrating the system
