Pipe Selection - Fujitsu Airstage AJYA72GALH Manuel D'installation

• 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
• 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
Between RB unit and indoor unit
Between RB units
• Total refrigerant amount : 70 kg or more
• Outdoor unit capacity : Master ≥ Slave
C) In the case of 3 outdoor units connected
O.U.-3
(Slave2)
O.U.-1
O.U.-2
H4
(Master)
(Slave1)
a
b
c
d
e
f
RB
RB
Fig. C
I.U. I.U.
H6
p
RB RB
I.U. I.U.
• 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
Between RB unit and indoor unit
Between RB units
• Total refrigerant amount : 105 kg or more
• 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

CAUTION
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.
En-7
All manuals and user guides at all-guides.com
a+e+f
165 m or less
a+e+p
60 m or less f, p
1000 m or less Total
3 m or less a, b
50 m or less
H1
40 m or less
15 m or less H2, H3
0.5 m or less H4
5 m or less H5
15 m or less H6
O.U. :Outdoor unit
RB :RB unit
I.U. :Indoor unit
(*1:Cooling only)
RB RB
H1
*1
I.U. I.U. I.U.
RB RB
H2
I.U.
H5
H3
I.U.
a+e+f
165 m or less
a+e+p
60 m or less f, p
1000 m or less Total
3 m or less a, b, c
b+d
12 m or less
c+d
50 m or less
H1
40 m or less
15 m or less H2, H3
0.5 m or less H4
5 m or less H5
15 m or less H6
Master Slave
unit unit1
Outdoor unit branch kit (Optional)
Separation tube (Optional)
(single
RB RB RB (multi type)
Pipe size
type)
(table D)
(Wall thickness and pipe material for each diameter)
Outside Diameter mm 6.35 9.52
*3
Wall Thickness mm 0.8 0.8
COPPER
Material JIS H3300 C1220T-O or equiva-
*1. Allowable tensile stress ≥ 33 (N/mm
*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 Outside diameter mm (in)
HP unit cooling
Liquid pipe
capacity (kW)
8
22.4 12.70 (1/2")
10 28.0 12.70 (1/2")
12 33.5 12.70 (1/2")
*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
Liquid pipe
unit (kW)
22.4 12.70 (1/2")
22.5 to 28.0 12.70 (1/2")
28.1 to 33.5 12.70 (1/2")
33.6 to 45.0 12.70 (1/2")
45.1 to 56.0 15.88 (5/8")
56.1 to 78.5 15.88 (5/8")
78.6 to 96.0 19.05 (3/4")
96.1 to 102.4 19.05 (3/4")
102.5 or more 19.05 (3/4")
Table. C (Between separation tubes or separation tube and RB unit)
Total cooling Outside diameter mm (in)
capacity of indoor
Discharge Gas
unit (kW) Liquid pipe
4.4 to 11.1 9.52 (3/8")
11.2 to 13.9 9.52 (3/8")
14.0 to 22.3 12.70 (1/2")
22.4 to 28.0 12.70 (1/2")
28.1 to 44.7 12.70 (1/2")
44.8 to 46.9 15.88 (5/8")
47.0 to 56.0 15.88 (5/8")
56.1 to 80.0 15.88 (5/8") 28.58 (1-1/8")
80.1 to 95.0 19.05 (3/4") 28.58 (1-1/8")
95.1 or more 19.05 (3/4") 28.58 (1-1/8")
* 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.
* Discharge gas pipe size selection : When indoor unit of cooling only type is connected,
it calculates with the value except capacity of cooling only type.
Slave
unit2
Pipe size (table A)
Pipe size (table B)
Pipe size (table C)
Pipe size (table E)
Pipe size (table F)
12.70 15.88 19.05 22.22 28.58 34.92 41.27
0.8 1.0 1.2 1.0 1.0 1.2 1.43
*1 *2
COPPER
JIS H3300 C1220T-H or
lent equivalent
2
)
2
)
*4
Branch kit
Discharge Suction Gas
Gas pipe pipe
15.88 (5/8") 22.22 (7/8")
19.05 (3/4") 22.22 (7/8") UTP-DX567A
19.05 (3/4") 28.58 (1-1/8")
Outside diameter mm (in)
Discharge Gas
Suction Gas pipe
pipe
15.88 (5/8") 22.22 (7/8")
19.05 (3/4") 22.22 (7/8")
19.05 (3/4") 28.58 (1-1/8")
22.22 (7/8") 28.58 (1-1/8")
22.22 (7/8") 28.58 (1-1/8")
28.58 (1-1/8") 34.92 (1-3/8")
28.58 (1-1/8") 34.92 (1-3/8")
28.58 (1-1/8") 41.27 (1-5/8")
34.92 (1-3/8") 41.27 (1-5/8")
Separation
tube
Suction Gas
for 3 pipes
pipe pipe
12.70 (1/2") 15.88 (5/8")
12.70 (1/2") 19.05 (3/4")
UTP-
BX090A
15.88 (5/8") 22.22 (7/8")
19.05 (3/4") 22.22 (7/8")
19.05 (3/4") 28.58 (1-1/8")
UTP-
19.05 (3/4") 28.58 (1-1/8")
BX180A
22.22 (7/8") 28.58 (1-1/8")
34.92 (1-3/8")
UTP-
34.92 (1-3/8")
BX567A
41.27 (1-5/8")