20
English
Prohibited patterns:
change to pattern 1 or 2
1
2
2
1
2
2
1
To indoor units
2
Oil collects to the outmost outdoor units
Change to configuration as in figure below
1
2
1
2
1
2
1
To indoor the units
2
Oil collects to the outmost outdoor units
Correct configuration
1
1
1
8 in
. (2
00
mm)
1
To indoor units
• If the piping length between the outdoor units exceeds 6.5 ft. (2 m),
create a rise of 8 in. (200 mm) or more in the gas line within a length
of 6.5 ft. (2 m) from the kit.
If ≤6.5 ft. (2 m)
1
2
a
If >6.5 ft. (2 m)
1
a
c
2
b
1 To indoor units
2 Piping between outdoor units (bold line)
a
≤6.5 ft. (2 m)
b >6.5 ft. (2 m)
c
≥8 in. (200 mm)
8.2.6.
Branching the refrigerant piping
The following optional kit is required for multiple connections of indoor
and outdoor units. When installing the unit, observe the following
restrictions and follow the installation instructions provided with the kit.
NOTE
If the kit is not installed correctly, functional failure or outdoor unit fail-
ure may occur due to uneven flow of refrigerant and refrigerator oil.
1
Connecting the refrigerant branch kit (REFNET joint or REFNET
header) for multiple connections of indoor units and others. (other
than outdoor units)
REFNET joint
Mount the REFNET joint so that it branches either horizontally
(within ±30°) or vertically.
±3
0°
Horizontal
Vertical
Horizontal surface
REFNET header
Mount the REFNET header so that it branches horizontally.
• Be sure to install it horizontally.
Horizontal surface
Gas side header
Mount the REFNET header so that the branch pipes are on the
underside and branch horizontally.
Horizontal surface
Liquid side header
2
Connecting the outdoor unit multi connection piping kit for multiple
outdoor unit systems
• Install the joints horizontally, so that the caution label (1) attached to
the joint comes to the top.
- Do not tilt the joint more than 15° (see view A).
- Do not install the joint vertically (see view B).
• Make sure that the total length of the piping connected to the joint
is absolute straight for more than 19-11/16 in. (500 mm). Only if a
straight field piping of more than 4-3/4 in. (120 mm) is connected,
more than 19-11/16 in. (500 mm) of straight section can be ensured.
• Improper installation may lead to malfunction of the outdoor unit.
A
1
B
1
C
D
±15°
C >4-3/4 in. (120 mm)
D >19-11/16 in. (500 mm)
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2022/11/17 16:07:25
2022/11/17 16:07:25
