7
English
(4)
If the piping length between the outside units exceeds 80 in., cre-
ate a rise of 8 in. or more in the gas piping under a length of 80 in.
from the outside unit multi connection piping kit.
5.
Branching the refrigerant piping
Heed the restrictions below when installing the refrigerant branching
kit and read the installation instruction manual with the kit.
(Improper installation could lead to malfunctioning or breakdown of
the outside unit.)
<REFNET joint>
Install the REFNET joint so it splits horizontally or vertically.
(Refer to figure 14)
1.
Horizontal
2.
A-arrow view
3.
Horizontal surface
4.
±30° or less
5.
Vertical
<REFNET header>
Install the REFNET header so it splits horizontally.
(Refer to figure 15)
1.
Horizontal surface
2.
B-arrow view
Prohibited pattern
Oil remains in the stopping outside unit.
Change to pattern 1 or pattern 2
Front connections
Side (bottom) connections
to indoor unit
to indoor unit
Oil remains in the unit A when system stops.
Change as shown in the figure below.
Rising height :
8 in. or more
Unit B
Unit B
Unit A
Unit A
Unit
A
Unit
B
Unit
B
Unit
A
Unit
A
Unit
A
Unit
B
Unit
B
Unit
A
Unit
A
Unit
B
Unit
B
Connect straightly
Oil remains in the unit B when system stops.
Change as shown in the figure below.
Connect straightly
Put rising
to indoor unit
to indoor unit
If less than 80 in.
If 80 in. or more
Rising height :
8 in. or more
less than 80 in.
less than 80 in.
Unit
A
Unit
B
Unit
A
Unit
B
Gas pipe between
outside units
Gas pipe between
outside units
