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3.5. Installing the unit
• Please install the outdoor unit without slant. (within 0.3 degrees)
• Install 4 anchor bolts at the locations indicated with arrows in the figure.
• To reduce vibration, do not install the unit directly on the ground. Install it on a secure
base (such as concrete blocks).
• The foundation shall support the legs of the unit and have a width of 80 mm or more.
• Depending on the installation conditions, the outdoor unit may spread its vibration during
operation, which may cause noise and vibration. Therefore, attach damping materials
(such as damping pads) to the outdoor unit during installation.
• Install the foundation, making sure that there is enough space for installing the connec-
tion pipes.
• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially avail-
able M10 to M12 bolts, nuts, and washers.)
• The bolts should protrude 20 mm. (Refer to the figure.)
• If overturning prevention is required, purchase the necessary commercially available
items.
166
650
50
AIR
• Do not install directly on the ground, this may result in equipment failure.
• The drain water is discharged from the bottom of the equipment. Construct a drain ditch
around the base and discharge the drain water properly.
• Provide ample space for ice buildup from condensate between the bottom of the unit and
the flat surface on which it is mounted. Otherwise, there is risk that the drainage water
will freeze between the device and the surface, disabling drainage.
If the unit is installed in a region that is exposed to
high winds, freezing conditions, freezing rain, snow
fall or heavy snow accumulation, take appropriate
measures to protect it from those elements.
To ensure stable operation, the outdoor unit must be
installed on a raised stand or rack, at or above the
anticipated snow depth for the region.
The installation of snow hoods and drift prevention
fencing is recommended when blowing and drifting
Base
snow is common to the region.
4. SYSTEM CONFIGURATION
For detailed information, refer to the Design and Technical Manual.
4.1. System confi guration
Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the
total amount of refrigerant when charging will lead to malfunction.
• Between outdoor unit and the farthest indoor unit
a + f ≤ 50 m, a + p ≤ 50 m
• Between the first separation tube and the farthest indoor unit
f ≤ 40 m, p ≤ 40 m
• Between the nearest indoor unit and the outdoor unit
a + b + h ≥ 5 m, a + c + q ≥ 5 m
• Between outdoor unit and the first separation tube
a ≥ 3 m
• Difference in height between outdoor units and indoor units (H1)
30 m or less: Outdoor unit is higher than indoor unit
30 m or less: Outdoor unit is lower than indoor unit
• Difference in height between indoor units and indoor units (H2, H3)
15 m or less: Outdoor unit is higher than indoor unit
15 m or less: Outdoor unit is lower than indoor unit
• Maximum total equivalent pipe length
a + f + h + j + l + n + p + q + s + u ≤ 80 m
• Total refrigerant amount
6.83 kg
Fig. A
a
f
b
j
h
c
I.U.
p
q
I.U.
I.U.: Indoor unit
En-5
154
50
Bolt
CAUTION
CAUTION
Outdoor unit
l
n
I.U.
I.U.
I.U.
I.U.
s
u
I.U.
I.U.
H3
I.U.
4.2. Pipe selection
This unit is designed specifically for use with the R410A refrigerant.
Pipes for R407C or R22 may not be used with this unit.
Do not use existing pipes.
Improper pipe selection will degrade performance.
Pipe size
(table B)
I.U.:
Indoor unit
Unit: mm
Table. A
(Wall thickness and pipe material for each diameter)
Outside Diameter
Nut
Wall Thickness (
Base
Material
Please select the pipe size in accordance with local rules.
*1: Allowable tensile stress ≥ 33 (N/mm
*2: Endurance pressure of the pipes 4.2MPa
Table. B
(Diameter of piping used between outdoor unit and first separation
tubes or headers)
Liquid pipe
9.52 (3/8)
Table. C
(Diameter of piping used between separation tubes)
Outside diameter [mm (in)]
Liquid pipe
9.52 (3/8)
*3: For the installation method, please refer to the installation manuals for indoor unit,
separation tubes or headers.
Use a standard separation tube for pipe branching. Do not use a T tube as it does not
separate the refrigerant evenly.
Table. D
(Diameter of piping used between separation tube and indoor unit)
Model code of
indoor unit
04 to 14
18 to 34
36 to 54
Table. E
(Indoor unit capacity comparison table - The indication of power is
different depending on the model.)
Model code of
indoor unit
Capacity [kW]
In the case of ARXD007GLEH: equivalent to model code of indoor unit
4.3. Protection of pipes
Location
Outdoor
Indoor
• Protect the pipes to prevent the entry of moisture and dust.
• Especially pay attention when passing the pipes through a hole or connecting the end of
a pipe to the outdoor unit.
H1
H2
CAUTION
First separation
tube (optional)
I.U.
I.U.
I.U.
I.U.
mm
6.35
9.52
(in)
(1/4)
(3/8)
mm
0.8
0.8
*2)
(in)
(0.032)
(0.032)
COPPER (*1) JIS H3300 C1220T-O or equivalent
)
2
Diameter of piping [mm(in)]
Separation tube *3
Gas pipe
15.88 (5/8)
UTP-AX054A
Outside diameter [mm(in.)]
Liquid pipe
6.35 (1/4)
9.52 (3/8)
9.52 (3/8)
04/
07/
09/
12/
14/
18/
004
007
009
012
014
018
1.1
2.2
2.8
3.6
4.5
5.6
Model code 007 → Capacity=2.2 kW
Working period
1 month or more
Pinch pipes
Less than 1 month
Pinch or tape pipes
—
Pinch or tape pipes
Separation
tube (optional)
Pipe size
(table C)
Pipe size
(table D)
I.U.
I.U.
12.70
15.88
19.05
(1/2)
(5/8)
(3/4)
0.8
1.0
1.2
(0.032)
(0.039)
(0.047)
Gas pipe
15.88 (5/8)
Header *3
UTR-H0906L
UTR-H0908L
Gas pipe
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
24/
30/
36/
45/
54/
024
030
036
045
054
7.1
9.0
11.2 12.5 14.0
Protection method
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