Design Technical Manual

Table Of Contents
3-2. PIPING TO OUTDOOR UNIT
OUTDOOR UNIT POSITION
When installing outdoor units, make the master unit
closest to the main pipe.
Select outdoor unit capacity in the order :
Outdoor unit1 ≥ Outdoor unit2 ≥ Outdoor unit3
(Master) (Slave 1) (Slave 2)
When connecting Master unit with Slave unit(s), install
them as close as possible.
Select mounting positions of the master and slave units
that stay within the piping limitations.
The lowest outdoor unit
The height di󰀨erence between the lowest and the highest outdoor unit in the same refrigerant system ≤ 19in.
(500mm)
¾
Install the branch kit horizontally.
The highest outdoor unit
Less than
19in. (500mm)
The maximum pipe length between master unit and the furthest slave unit ≤ 49ft. (15m)
¾
Install the branch kit horizontally.
Less than 49ft. (15m)
¾
Mount the outdoor unit with enough space to install the piping and service and maintain the
unit.
Main pipe
Indoor unit side
Outdoor unit1
(Master)
Outdoor unit2
(Slave1)
Outdoor unit3
(Slave2)
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SYSTEM
DESIGN
SYSTEM
DESIGN