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Table. G (Separation tube / Header)
Separation tube
Total cooling capacity of
indoor unit (kW)
19.6 or less
UTP-AX054A
28.0 or less
UTP-AX090A
28.1 to 56.0
UTP-AX180A
56.1 or more
UTP-AX567A
Header
Total cooling
capacity of indoor
for 2 pipes
unit (kW)
3-6 Branches
28.0 or less
UTR-H0906L
28.1 to 56.0
UTR-H1806L
For the installation method, refer to the section on "Indoor unit pipe connections" below.
Table. H (Indoor unit capacity comparison table - The indication of power is
different depending on the model.)
Model code of
04/
07/
09/
12/
14/
indoor unit
004
007
009
012
014
Capacity [kW] 1.1 2.2 2.8 3.6 4.5 5.6 7.1 9.0 10.0 11.2 12.5 14.0 18.0 22.4 25.0 28.0
In the case of ARXD007GLEH: equivalent to model code of indoor unit
Model code 007 → Capacity=2.2 kW
4.3. Protection of pipes
• 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.
Location
Working period
1 month or more
Outdoor
Less than 1 month
Indoor
—
5. PIPE INSTALLATION
5.1. Brazing
If air or another type of refrigerant enters the refrigera-
tion cycle, the internal pressure in the refrigeration
cycle will become abnormally high and prevent the
unit from exerting its full performance.
Apply nitrogen gas while brazing the pipes.
Nitrogen gas pressure: 0.02 MPa (= pressure felt suf-
ficiently on the back of your hand)
If a pipe is brazed without applying nitrogen gas, it will create an oxidation film.
This can degrade performance or damage the parts in the unit (such as the compressor
or valves).
Do not use flux to braze pipes. If the flux is the chlorine type, it will cause the pipes to
corrode.
In addition, if the flux contains fluoride, it will affect the refrigerant piping system due to
deterioration of refrigerant oil.
For brazing material, use phosphor copper that does not require flux.
5.2. Indoor unit pipe connections
For details, refer to the Installation Instruction Sheet of each part.
Separation tube
A
:
Outdoor unit or Refrigerant
branch kit
A
B
:
Indoor unit or Refrigerant
± 15°
branch kit
PROHIBITED
Separation tube (
*5)
for 2 pipes
for 3 pipes
—
UTP-BX090A
UTP-BX180A
UTP-BX567A
Header
*5
for 3 pipes
3-8 Branches
3-6 Branches
3-8 Branches
UTR-H0908L
UTP-J0906A
UTP-J0908A
UTR-H1808L
UTP-J1806A
UTP-J1808A
18/
24/
30/
34/
36/
45/
54/
60/
72/
018
024
030
034
036
045
054
060
072
Protection method
Pinch pipes
Pinch or tape pipes
Pinch or tape pipes
CAUTION
Pressure regulating valve
Cap
Nitrogen gas
Brazing area
CAUTION
Vertical
Horizontal
A
B
B
or
Horizontal line
B
GOOD
GOOD
Header
Gas pipe
C
Outdoor
unit side
Liquid pipe
D
Outdoor
unit side
PROHIBITED
Do not connect a separation tube after a header.
90/
96/
Leave the distance 0.5 m or more for straight part to branch tube and header.
090
096
Main pipe
Main pipe
0.5 m or more
0.5 m or more
5.3. Opening the knockout hole
Be careful to prevent panel deformation or damaged while opening the knockout hole.
To prevent cutting of the wiring after the knockout hole was opened, remove the burrs
along the edge.
In addition, to prevent rusting, painting the edge with rust preventive paint is recom-
mended.
The piping can be connected from 2 directions; the front or the bottom.
(Knockout holes are provided so that the piping can be connected from 2 different direc-
tions.)
Use the front knockout hole, as required.
Fig. A Knockout position
Fig. C Detail of knockout position (front)
A
Horizontal line
Horizontal line
β
1
α
1
C
GOOD
View
H
1
Horizontal line
Vertical line
α
2
H
2
β
GOOD
D
View
CAUTION
0.5 m or more
Separation tube
To indoor unit
0.5 m or more
Header
To indoor unit
To indoor unit
Separation tube
To indoor unit
Header
To indoor unit
CAUTION
Fig. B Detail of knockout
80
82
(Unit: mm)
Knockout
hole
73
125
43
199
H
= 0 to 10 mm
1
(α
: 0° to 1°)
1
β
: -10° to 10°
1
H
= 0 to 10 mm
2
(α
: 0° to 1°)
2
β
: -10° to 10°
2
2
To indoor unit
position (bottom)
(Unit: mm)
Knockout
hole
197
42
En-8
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