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When multiple indoor units are served by a single
outdoor unit, the refrigerant piping must be connect-
ed using either branch box(es) or individual branch
pipes. Optional branch box V8MIDB01 and branch
pipes V8IDBP01 and V8IDBP02 are ordered sepa-
rately.
Each branch box can be used to connect a maximum
of four indoor units to the outdoor unit. When the sys-
tem includes fi ve, six, seven, or eight indoor units,
two branch boxes must be used. When the system
includes nine indoor units, three branch boxes must
be used.
From
Outdoor
Unit
First Elbow or Branch
Pipe Connection
>39” (991 mm)
>20”
(508 mm)
To
Indoor
Unit
Branch
Box
Figure 17. Straight Pipe In and Out
A minimum of 39 inches (991 mm) of straight pipe
into the branch box.
A minimum of 20 inches (508 mm) of straight pipe
out of the branch box. See Figure 17.
When using branch pipes to connect multiple indoor
units with a single outdoor unit, each indoor unit re-
quires a separate branch pipe to connect both the
liquid and gas (vapor) line to the system. Install these
optional devices per the installation instructions pro-
vided with them. See the piping schematics on the
following pages.
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