Pipe Selection - Fujitsu Airstage AJYA72LALH Installation Manual

• Allowable height difference
Between outdoor unit and indoor unit (When
indoor unit is installed below)
Between outdoor unit and indoor unit (When
outdoor unit is installed below)
Between indoor units
Between outdoor units
• Total refrigerant amount : 63 kg or less
• Outdoor unit capacity : Master ≥ Slave
C) In the case of 3 outdoor units connected
Fig. C
O.U.-1
O.U.-2
H4
(Master)
(Slave1)
a
b
d
e
• Allowable pip length (actual pipe length)
Between master outdoor unit and the
farthest indoor unit
Between the fi rst separation tube and the
farthest indoor unit
Total pipe length
Between outdoor unit and outdoor unit
branch kit
Between the farthest outdoor unit and the
fi rst outdoor unit branch kit
• Allowable height difference
Between outdoor unit and indoor unit (When
indoor unit is installed below)
Between outdoor unit and indoor unit (When
outdoor unit is installed below)
Between indoor units
Between outdoor units
• Total refrigerant amount : 94.5 kg or less
• Outdoor unit capacity : Master ≥ Slave 1 ≥ Slave 2
NOTE) • If the outdoor temperature during cooling operation is expected to be –5 °C
or less, do not install the outdoor unit lower than the indoor unit.
• Please refer to "8.3.2. Checking total amount of refrigerant and calculat-
ing the amount of refrigerant charge to be added" for the total amount of
refrigerant.
4. 2.

Pipe selection

This unit is designed specifi 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.
Master Slave
unit unit1
Outdoor unit
First separation
branch kit
tube (optional)
(optional)
Indoor Indoor Indoor
unit unit unit
En-7
50 m or less
40 m or less
15 m or less
0.5 m or less
O.U.-3
(Slave2)
O.U. :Outdoor unit
I.U. :Indoor unit
c
f
H1
p
H2
H3
150 m or less
60 m or less
1000 m or less
3 m or less
12 m or less
50 m or less
40 m or less
15 m or less
0.5 m or less
CAUTION
Slave
unit2
Pipe size
(table A)
Pipe size
(table B)
Separation tube
(optional)
Pipe size
(table C)
Pipe size
(table D)
Indoor Indoor Indoor
unit unit unit
(Wall thickness and pipe material for each diameter)
Outside Diameter mm 6.35 9.52 12.70 15.88 19.05 22.22 28.58 34.92 41.27
Wall Thickness
H1
Material
H2, H3
*1. Allowable tensile stress ≥ 33 (N/mm
H4
*2. Allowable tensile stress ≥ 61 (N/mm
*3. Endurance pressure of the pipes 4.2MPa
Please select the pipe size in accordance with local rules.
Table. A (Between outdoor unit and outdoor unit branch kit)
Outdoor unit cooling
HP
capacity (kW)
8
10
12
14
16
*4. For the installation method, refer to "5.4. Multiple connections".
Table. B (Between outdoor unit branch kits or outdoor unit branch kit and
fi rst separation tube)
Total cooling capacity
of outdoor unit (kW)
a+e+f
a+e+p
f, p
Table. C (Between separation tubes)
Total
a, b, c
Total cooling capacity
of indoor unit (kW)
b+d
c+d
H1
H2, H3
H4
* 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 fi rst separation
tube (based on table "B"), please select the pipe whose diameter is equal to the one
between outdoor unit branch kit and the fi rst 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.
Table. D (Between separation tube to indoor unit
Model code
07, 09, 12, 14
18, 24, 30
36, 45, 54, 60
72, 90
Use a standard separation tube for pipe branching. Do not use a T tube as it does not
separate the refrigerant evenly.
Table. E (Separation tube / Header)
• Separation tube
Total cooling capacity of indoor unit (kW)
*3
mm 0.8 0.8 0.8 1.0 1.2
*1
COPPER
JIS H3300 C1220T-O or equiva-
lent
2
)
2
)
Outside diameter (mm)
Liquid pipe Gas pipe
22.4 12.70 (1/2") 22.22 (7/8")
28.0 12.70 (1/2") 22.22 (7/8")
33.5 12.70 (1/2") 28.58 (1-1/8")
40.0 12.70 (1/2") 28.58 (1-1/8")
45.0 12.70 (1/2") 28.58 (1-1/8")
Liquid pipe
22.4 to 28.0 12.70 (1/2")
28.1 to 45.0 12.70 (1/2")
45.1 to 56.0 15.88 (5/8")
56.1 to 80.0 15.88 (5/8")
80.1 to 96.0 19.05 (3/4")
96.1 or more 19.05 (3/4")
Liquid pipe
4.4 to 11.1
11.2 to 13.9
14.0 to 28.0 12.70 (1/2")
28.1 to 44.7 12.70 (1/2")
44.8 to 56.0 15.88 (5/8")
56.1 to 80.0 15.88 (5/8")
80.1 to 95.0 19.05 (3/4")
95.1 or more 19.05 (3/4")
Cooling capacity of
indoor unit (kW)
2.2, 2.8, 3.6, 4.0, 4.5
5.6, 7.1, 8.0, 9.0
11.2, 12.5, 14.0, 18.0
22.4, 25.0
28.0 or less UTP-AX090A or UTR-BP090X
28.1 to 56.0 UTP-AX180A or UTR-BP180X
56.1 or more UTP-AX567A or UTR-BP567X
1.0 1.0 1.2 1.43
*2
COPPER
JIS H3300 C1220T-H or
equivalent
*4
Branch kit
UTP-DX567A,
UTR-CP567X
Outside diameter (mm)
Gas pipe
22.22 (7/8")
28.58 (1-1/8")
28.58 (1-1/8")
34.92 (1-3/8")
34.92 (1-3/8")
41.27 (1-5/8")
Outside diameter (mm)
Gas pipe
9.52 (3/8") 15.88 (5/8")
9.52 (3/8") 19.05 (3/4")
22.22 (7/8")
28.58 (1-1/8")
28.58 (1-1/8")
34.92 (1-3/8")
34.92 (1-3/8")
41.27 (1-5/8")
)
Outside diameter mm (in)
Liquid pipe Gas pipe
6.35 (1/4") 12.70 (1/2")
9.52 (3/8") 15.88 (5/8")
9.52 (3/8") 19.05 (3/4")
12.70 (1/2") 22.22 (7/8")
*5
Separation tube