17
3P477778-7G English
• 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 suction gas and high/
low pressure 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
b
c
2
1 To indoor units
2 Piping between outdoor units
a
≤6.5 ft. (2 m)
b
≥8 in. (200 mm)
c >6.5 ft. (2 m)
NOTE
There are restrictions on the refrigerant pipe connection order be-
tween outdoor units during installation in case of a multiple outdoor
unit system. Install according to following restrictions. The capacities
of outdoor units A and B must fulfill the following restriction conditions:
A≥B.
A
B
1 2
1 To indoor units
2 Outdoor unit multi connection
piping kit (first branch)
8 .2 .6 . Branching the refrigerant piping
1
For installation of the refrigerant branch kit, refer to the installation
manual delivered with the kit.
A
B
±3
0°
1
1
Horizontal
Vertical
1 Horizontal surface
• Mount the REFNET joint so that it branches either horizontally or
vertically.
• Mount the REFNET header so that it branches horizontally.
2
Installation of the multi connection piping kit.
A
1
B
1
C
D
±15°
C >4-3/4 in. (120 mm)
D >19-11/16 in. (500 mm)
•
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.
8 .3 . Guidelines for handling stop valve
8 .3 .1 . Cautions on handling the stop valve
•
Make sure to keep all stop valves open during operation.
• The figure below shows the name of each part required in handling
the stop valve.
•
The stop valves are factory closed.
•
When handle the stop valves, be careful not to damage the port
pipes around (refer to P22).
3
4
1
2
1 Service port and service port
cover
2 Stop valve
3 Field piping connection
4 Stop valve cover
1
2
3
4
5
1 Service port
2 Cap
3
Hexagon hole
4 Shaft
5 Seal
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