En-9
Table. B (Between outdoor unit branch kits or outdoor unit branch kit and first
separation tube)
[Standard]
Ton
Total cooling capacity of
outdoor unit [Btu/h]
Outside diameter [in (mm)]
Liquid pipe Gas pipe
6 72,000
3/8 (9.52)
3/4 (19.05)
8 96,000 7/8 (22.22)
10 120,000
1/2 (12.70)
1-1/8 (28.58)
12 144,000
14 168,000
5/8 (15.88)
16 184,000
18 216,000
1-3/8 (34.92)
20 240,000
22 264,000
24 288,000
3/4 (19.05)
26 312,000
28 336,000
1-5/8 (41.27)
30 360,000
32 384,000
34 408,000
36 432,000
[Condition 1]
When one or more of the following apply:
• The distance between the outdoor unit (primary) and the farthest indoor unit is 230 ft (70
m) or more.
• If the outdoor unit is lower than the indoor unit and the height difference exceeds 16 ft (5
m); only for liquid pipes.
Ton
Total cooling capacity of
outdoor unit [Btu/h]
Outside diameter [in (mm)]
Liquid pipe Gas pipe
6 72,000
1/2 (12.70)
7/8 (22.22)
8 96,000
10 120,000
1-1/8 (28.58)
12 144,000
14 168,000
5/8 (15.88)
16 184,000
18 216,000
1-3/8 (34.92)
20 240,000
22 264,000
24 288,000
3/4 (19.05)
26 312,000
28 336,000
1-5/8 (41.27)
30 360,000
32 384,000
34 408,000
36 432,000
Table. C (Between separation tubes)
* If the selected pipe diameter between separation tubes (based on table "C") becomes
larger than the pipe diameter between outdoor unit branch kit and the first separation
tube (based on table "B"), please select the pipe whose diameter is equal to the one
between outdoor unit branch kit and the first separation tube.
(If pipe diameter C > 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.
Total cooling capacity of
indoor unit [Btu/h]
Outside diameter [in (mm)]
Liquid pipe Gas pipe
8,000 ≤ x < 36,000
3/8 (9.52)
5/8 (15.88)
36,000 ≤ x < 48,000
3/4 (19.05)
48,000 ≤ x < 66,000
1/2 (12.70)66,000 ≤ x < 96,500 7/8 (22.22)
96,500 ≤ x < 153,000
1-1/8 (28.58)153,000 ≤ x < 161,000
5/8 (15.88)161,000 ≤ x < 193,000
193,000 ≤ x < 274,000
1-3/8 (34.92)
274,000 ≤ x < 325,000
3/4 (19.05)
325,000 ≤ x 1-5/8 (41.27)
Table. D (Between separation tube and indoor unit
)
* Use a standard separation tube for pipe branching. Do not use a T tube as it does not
separate the refrigerant evenly.
[Standard]
Cooling capacity of indoor unit
[Btu/h]
Outside diameter mm (in)
Liquid pipe Gas pipe
4,000 / 7,500 / 9,500
1/4 (6.35)
3/8 (9.52)
12,000 / 14,000
1/2 (12.70)
18,000
24,000 / 30,000 / 34,000
3/8 (9.52)
5/8 (15.88)
36,000
48,000
60,000
72,000 3/4 (19.05)
96,000 7/8 (22.22)
[Condition 1]
When one or more of the following apply:
• The distance between the outdoor unit (primary) and the farthest indoor unit is 394 ft
(120 m) or more.
• The distance between the first branch and the farthest indoor unit is 60 m or more.
• Pipe length of indoor unit (4,000 to 9,500 Btu/h, 48,000 to 60,000 Btu/h, 96,000 Btu/h)
and branch is 66 ft (20 m) or more.
• If the outdoor unit is lower than the indoor unit and the height difference exceeds 16 ft (5
m); only for liquid pipes.
Cooling capacity of indoor unit
[Btu/h]
Outside diameter mm (in)
Liquid pipe Gas pipe
4,000 / 7,500 / 9,500
1/4 (6.35) 1/2 (12.70)
12,000 / 14,000
18,000 3/8 (9.52)
5/8 (15.88)
24,000 / 30,000 / 34,000
3/8 (9.52)
36,000
3/4 (19.05)48,000
60,000
72,000
1/2 (12.70) 7/8 (22.22)
96,000
Separation tube/Header
* For the installation method of separation tube and header, refer to “6.2. Indoor unit pipe
connections”.
Total cooling capacity
of indoor unit [Btu/h]
Separation tube
(
*1)
Header (*1)
3-6 Branches 3-8 Branches
x < 66,000 UTP-AX054A
UTR-H0906L UTR-H0908L
x < 96,500 UTP-AX090A
96,500 ≤ x < 193,000 UTP-AX180A UTR-H1806L UTR-H1808L
193,000 ≤ x UTP-AX567A — —
Outdoor air unit
Connectable unit within 1 refrigerant system
Unit
Connectable cooling
capacity range
Remarks
Only Outdoor air unit 50% to 100% —
Outdoor air unit
+ Indoor unit
50% to 100%
The capacity of "Outdoor air
unit" should be less than 30%
of the outdoor unit capacity.
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 Protection method
Outdoor
1 month or more Pinch pipes
Less than 1 month Pinch or tape pipes
Indoor — Pinch or tape pipes
9378945722-05_IM_L3.indb 99378945722-05_IM_L3.indb 9 2023/3/24 9:23:482023/3/24 9:23:48
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