Downsizing Of Pipe Diameter - Fujitsu AIRSTAGE AJY072LALBH Installation Manual

• Header
Total cooling capacity of indoor unit (kW)
28.0 or less
28.1 to 56.0
*5. For the installation method, refer to the section on "Indoor unit pipe connections"
below.
Table. F (Indoor unit capacity comparison table - The indication of power is dif-
ferent depending on the model.)
Model code of Capacity
indoor unit [kW]
04 1.1
07 2.2
09 2.8
12 3.6
14 4.5
18 5.6
24 7.1
30 9.0
In the case of ARXD07GALH: equivalent to model code of indoor unit
Model code 07 → Capacity = 2.2kW
• Outdoor air unit
Connectable unit within 1 refrigerant system
Connectable cooling
Unit
capacity range
Only Outdoor air unit 50% to 100%
Outdoor air unit
50% to 100%
+ Indoor unit
4. 3.

Downsizing of pipe diameter

Note: Reducers are fi eld supplied.
• Downsizing of the liquid and gas pipe can be done in "4.2 Pipe selection", if pipe
length is limited as below in "4.1 System confi guration".
• Allowable downsizing are indicated by "→" in table A2, B2, C2, D2.
O.U.-1 O.U.-2
(Master) (Slave)
a
b
e
g
h
I.U. I.U.
m
l
I.U. I.U.
Master Slave
unit unit1
Outdoor unit
First separation
branch kit
tube (optional)
(optional)
Indoor Indoor Indoor Indoor
unit unit unit
A (between outdoor unit and outdoor unit branch kit)
• Allowable pipe length (actual pipe length)
Between master out door unit and the
farthest indoor unit
Between outdoor unit and indoor unit (When
outdoor unit is installed below)
* Only when the size of the liquid pipe goes
down
* (+e): applies to multiple outdoor units connections.
Header *5
3-6 Branches 3-8 Branches
UTR-H0906L UTR-H0908L
UTR-H1806L UTR-H1808L
Model code of Capacity
indoor unit [kW]
34 10.0
36 11.2
45 12.5
54 14.0
60 18.0
72 22.4
90 25.0
96 28.0
Remarks
-
The capacity of "Outdoor air
unit" should be less than 30%
of the outdoor unit capacity.
O.U. : Outdoor unit
I.U. : Indoor unit
f
k
j
i
H
I.U. I.U. I.U.
p
n
o
I.U.
I.U.
Slave
unit2
Pipe size
(table A2)
Pipe size
(table B2)
Separation tube
(optional)
Pipe size
(table C2)
Pipe size
(table D2)
Indoor Indoor
unit unit unit
a (+e)+f,
70 m or less
a (+e)+p
5 m or less
Table. A2
Outdoor unit
HP cooling
capacity (kW)
8
22.4
10
28.0
12
33.5
14 40.0
16 45.0
18 50.0
B (between outdoor unit branch kits or outdoor unit branch kit and fi rst separation
tube)
• Allowable pipe length (actual pipe length)
Between master out door unit and the
farthest indoor unit
Between outdoor unit and indoor unit (When
outdoor unit is installed below)
* Only when the size of the liquid pipe goes
down
* (+e): applies to multiple outdoor units connections.
Table. B2
Total cooling capacity
of outdoor unit (kW)
22.4
22.5~28.0
28.1~45.0
45.1~56.0
56.1~62.4
62.5~80.0
80.1~96.0
96.1 or more
C (between separation tubes)
• Allowable pipe length (actual pipe length)
Between master out door unit and the
farthest indoor unit
Between the fi rst separation tube and the
farthest indoor unit
Between outdoor unit and indoor unit (When
outdoor unit is installed below)
* Only when the size of the liquid pipe goes
down
* (+e): applies to multiple outdoor units connections.
Table. C2
Total cooling capacity
of indoor unit (kW)
2.2~11.1
11.2~13.9
14.0~22.3
22.4~28.0
28.1~32.4
32.5~44.7
44.8~47.0
47.1~56.0
56.1~71.6
71.7~80.0
80.1~95.0
95.1~103.0
103.1 or more
(If pipe diameter C2 > B2, select pipe size from table B2.)
H
Outside diameter (mm)
Liquid pipe Gas pipe
12.70 (1/2") → 9.52(3/8") 22.22 (7/8") → 19.05 (3/4")
12.70 (1/2") → 9.52 (3/8") 22.22 (7/8")
12.70 (1/2") 28.58 (1-1/8")
12.70 (1/2") 28.58 (1-1/8")
12.70 (1/2") 28.58 (1-1/8")
15.88 (5/8") 28.58 (1-1/8")
70 m or less
5 m or less
Outside diameter (mm)
Liquid pipe Gas pipe
12.70 (1/2") → 9.52 (3/8") 22.22 (7/8") → 19.05 (3/4")
12.70 (1/2") → 9.52 (3/8") 22.22 (7/8")
12.70 (1/2") 28.58 (1-1/8")
15.88 (5/8") 28.58 (1-1/8")
15.88 (5/8") 34.92 (1-3/8") → 28.58 (1-1/8")
15.88 (5/8") 34.92 (1-3/8")
19.05 (3/4") 34.92 (1-3/8")
19.05 (3/4") 41.27 (1-5/8")
120 m or less
60 m or less
5 m or less
Outside diameter (mm)
Liquid pipe Gas pipe
9.52 (3/8") 15.88 (5/8")
9.52 (3/8") 19.05 (3/4") → 15.88 (5/8")
12.7 (1/2") → 9.52 (3/8") 22.22 (7/8") → 19.05 (3/4")
12.7 (1/2") 22.22 (7/8")
12.7 (1/2") 28.58 (1-1/8") → 22.22 (7/8")
12.7 (1/2") 28.58 (1-1/8")
15.88 (5/8") → 12.7 (1/2") 28.58 (1-1/8")
15.88 (5/8") 28.58 (1-1/8")
15.88 (5/8") 34.92 (1-3/8") → 28.58 (1-1/8")
15.88 (5/8") 34.92 (1-3/8")
19.05 (3/4") 34.92 (1-3/8")
19.05 (3/4") 41.27 (1-5/8") → 34.92 (1-3/8")
19.05 (3/4") 41.27 (1-5/8")
a (+e)+f,
a (+e)+p
H
a (+e)+f,
a (+e)+p
f, p
H
En-8