En-5
Pipe selection
4. 2.
CAUTION
This unit is designed speci
fi
cally 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.
First separation
tube (optional)
Separation tube
(optional)
Pipe size
(table B)
Pipe size
(table C)
Pipe size
(table D)
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
A (Wall thickness and pipe material for each diameter)
Table.
Outside Diameter
mm
(in.)
6.35
(1/4)
9.52
(3/8)
12.70
(1/2)
15.88
(5/8)
19.05
(3/4)
Wall Thickness
*2
mm
(in.)
0.8
(0.032)
0.8
(0.032)
0.8
(0.032)
1.0
(0.039)
1.2
(0.047)
Material
COPPER
*1
JIS H3300 C1220T-O or equivalent
Please select the pipe size in accordance with local rules.
Allowable tensile stress
*1.
>
=
33 (N/mm
2
)
Endurance pressure of the pipes 4.2MPa
*2.
B
(Diameter of piping used between outdoor unit and
fi
rst separation
Table.
tubes or headers)
MODEL
Outdoor
unit cooling
capacity (kW)
Diameter of piping [mm(in.)]
Between outdoor unit
and the farthest indoor
unit < 90m *3
Between outdoor unit
and the farthest indoor
unit
≥
90m *3
Liquid pipe
Gas pipe
Liquid pipe
Gas pipe
AJ A36LALH
11.2
9.52
(3/8)
15.88
(5/8)
9.52
(3/8)
19.05
(3/4)
AJ A40LALH
12.1
9.52
(3/8)
15.88
(5/8)
9.52
(3/8)
19.05
(3/4)
AJ A45LALH
14.0
9.52
(3/8)
15.88
(5/8)
9.52
(3/8)
19.05
(3/4)
AJ A54LALH
15.5
9.52
(3/8)
19.05
(3/4)
9.52
(3/8)
19.05
(3/4)
Pipe Length: “a+f” or “a+p” of “4.1. SYSTEM CONFIGURATION”
*3.
C (Diameter of piping used between separation tubes)
Table.
Total cooling capac-
ity of indoor unit [kW]
Outside diameter [mm(in.)]
Separation
tube *4
Header *4
Liquid pipe
Gas pipe
4.4 to 11.1
9.52
(3/8)
15.88
(5/8)
UTP-AX090A
UTR-H0906L
UTR-H0908L
11.2 to 20.1
9.52
(3/8)
19.05
(3/4)
For the installation method, please refer to the installation manuals for indoor
*4.
unit, separation tubes or headers.
If pipe diameter Table C>Table B , select pipe size from Table B.
“Total cooling capacity of indoor unit” is the total value for the cooling capacity of indoor
unit connected downstream.
Use a standard separation tube for pipe branching. Do not use a T tube as it does not
separate the refrigerant evenly.
D (Diameter of piping used between separation tube and indoor unit)
Table.
Model code of
indoor unit
Outside diameter [mm(in.)]
Liquid pipe
Gas pipe
07 to 14
6.35 (1/4)
12.70 (1/2)
18 to 30
9.52 (3/8)
15.88 (5/8)
36 to 54 *5
9.52 (3/8)
19.05 (3/4)
If pipe diameter Table D > Table C , using of pipe size from Table C is preferable.
*5.
(Use reducer to change the diameter of connection pipe.)
Installation the unit
3. 5.
Please install the outdoor unit without slant. (within 3 degrees )
•
Install 4 anchor bolts at the locations indicated with arrows in the
fi
gure.
•
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 50mm 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 con-
•
nection pipes.
Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially
•
available M10 bolts, nuts, and washers.)
The bolts should protrude 20mm. (Refer to the
fi
gure.)
•
If overturning prevention is required, purchase the necessary commercially available
•
items.
166
AIR
650
154
50
50
16
20
410
(Unit: mm)
Bolt
Nut
Base
Base
Do not install directly on the ground, this may result in
equipment failure.
Make sure the height of the base is 50 mm from the ground.
Otherwise, there is a risk that the drainage water will freeze
between the device and the surface, disabling drainage.
In areas with heavy snowfall , where intake
and outlet of the outdoor unit can become
blocked by snow.
It is recommended that unit be installed
under a canopy or elevated on a high
stand.
Failure to do so will result in poor heating
performance and/or premature failure of
equipment.
50 mm
or over
CAUTION
SYSTEM CONFIGURATION
4.
System con
fi
guration
4. 1.
CAUTION
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 <
= 120m, a+p <
= 120m
Between the
fi
rst separation tube and the farthest indoor unit
•
f <
= 40m, p <
= 40m
Between the nearest indoor unit and the outdoor unit
•
a+b+h>
=5m , a+c+q>
=5m
Between outdoor unit and the
fi
rst separation tube
•
a>
=3m
Difference in height between outdoor units and indoor units (H1)
•
30m: For the indoor unit stated below
30m: For the outdoor unit stated below
Difference in height between indoor units and indoor units
•
H2 <
= 15m, H3 <
= 15m
Maximum total equivalent pipe length
•
a+f+h+j+l+n+p+q+s+u <
= 180m
Total refrigerant amount
•
<
= 15.7kg
A
Fig.
Outdoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
H1
H2
H3
f
h
p
q
j
s
u
l
n
b
c
a
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