17
3P362438-1B English
If ≤ 6.5 ft. (2 m)
1
2
a
If > 6.5 ft. (2 m)
1
a
a
c
2
b
b
c
1 To indoor unit
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, B and C must fulfill the following restriction condi
-
tions: A≥B≥C.
A
B
C
1 2
3
1 To indoor unit
2
Outdoor unit multi connecting piping kit (first branch)
3 Outdoor unit multi connecting piping kit (second branch)
8 .2 .6 . Branching the refrigerant piping
•
For installation of the refrigerant branching kit, refer to the installa-
tion manual delivered with the kit.
A
B
±3
0°
1
1
1 Horizontal surface
1
Mount the refnet joint so that it branches either horizontally or
vertically.
2
Mount the refnet header so that it branches horizontally.
•
Installation of the multi connection piping kit.
A
1
max
15
B
1
C
D
C > 4-3/4 in. (120 mm)
D > 19-11/16 in. (500 mm)
3
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).
4
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 con
-
nected, more than 19-11/16 in. (500 mm) of straight section can be
ensured.
5
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 both stop valves open during operation.
• The figure below shows the name of each part required in handling
the stop valve.
•
The stop valve is factory closed.
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
