System Configuration; Pipe Selection; Protection Of Pipes - Fujitsu AirStage AJY040LELAH Installation Manual

4. SYSTEM CONFIGURATION

4.1. System confi guration
Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the
total amount of refrigerant when charging will lead to malfunction.
• Between outdoor unit and the farthest indoor unit
a + f ≤ 120 m, a + p ≤ 120 m
• Between the fi rst separation tube and the farthest indoor unit
f ≤ 40 m, p ≤ 40 m
• Between the nearest indoor unit and the outdoor unit
a + b + h ≥ 5 m, a+c+q ≥ 5 m
• Between outdoor unit and the fi rst separation tube
a ≥ 3 m
• Difference in height between outdoor units and indoor units (H1*)
50 m or less: Outdoor unit is higher than indoor unit
40 m or less: Outdoor unit is lower than indoor unit
• Difference in height between indoor units and indoor units
H2 ≤ 15 m, H3 ≤ 15 m
• Maximum total equivalent pipe length
a + f + h + j + l + n + p + q + s + u ≤ 180 m
• Total refrigerant amount ≤ 15.7 kg
Fig. A
f
b j
h
Indoor Indoor
c
unit
p
q s
Indoor
unit

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.
First separation
tube (optional)
Indoor Indoor Indoor
unit unit unit
Table. A (Wall thickness and pipe material for each diameter)
mm 6.35
Outside Diameter
(in) (1/4)
mm 0.8
*2
Wall Thickness
(in) (0.032)
Material COPPER
Please select the pipe size in accordance with local rules.
*1: Allowable tensile stress ≥ 33 N/mm
*2: Endurance pressure of the pipes 4.2 MPa
En-5
CAUTION
Outdoor
unit
a
l n
Indoor Indoor Indoor
unit unit unit unit
u H2
Indoor Indoor
unit unit
Indoor
H3
unit
CAUTION
Pipe size
(table B)
Separation tube
(optional)
Pipe size
(table C)
Pipe size
(table D)
Indoor Indoor
Indoor
unit unit
unit
9.52 12.70 15.88
(3/8) (1/2) (5/8)
0.8 0.8 1.0
(0.032) (0.032) (0.039)
*1
JIS H3300 C1220T-O or equivalent
Table. B (Diameter of piping used between outdoor unit and fi rst separation
tubes or headers)
MODEL
AJ*040LELAH
AJ*045LELAH
AJ*054LELAH
*3: Pipe Length: "a + f" or "a + p" of "4.1. System confi guration"
Table. C (Diameter of piping used between separation tubes)
Total cooling
capacity of indoor
unit [kW]
4.4 to 11.1
11.2 to 20.1
*4: For the installation method, please refer to the installation manuals for indoor unit,
separation tubes or headers.
If pipe diameter Table C > Table 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.
Use a standard separation tube for pipe branching. Do not use a T tube as it does not
separate the refrigerant evenly.
Table. D (Diameter of piping used between separation tube and indoor unit)
Model code of
indoor unit
07 to 14
H1* 18 to 30
36 to 54 *5
*5: If pipe diameter Table D > Table C , using of pipe size from Table C is preferable.
(Use reducer to change the diameter of connection pipe.)
Table. E (Indoor unit capacity comparison table - The indication of power is
different depending on the model.)
Model code of
indoor unit
Capacity [kW]
In the case of ARXB07LALH: equivalent to model code of indoor unit

4.3. Protection of pipes

Location
1 month or more
Outdoor
Less than 1 month
Indoor
• 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.
19.05
(3/4)
1.2
(0.047)
Diameter of piping [mm (in.)]
Outdoor
Between outdoor unit
unit cool-
and the farthest indoor
ing capac-
unit < 90m *3
ity [kW]
Liquid pipe Gas pipe
12.1 9.52 (3/8) 15.88 (5/8)
14.0 9.52 (3/8) 15.88 (5/8)
15.5 9.52 (3/8) 19.05 (3/4)
Outside diameter [mm(in.)]
Liquid pipe Gas pipe
9.52 (3/8) 15.88 (5/8)
9.52 (3/8) 19.05 (3/4)
Outside diameter [mm(in.)]
Liquid pipe
6.35 (1/4)
9.52 (3/8)
9.52 (3/8)
04 07 09 12 14 18
1.1 2.2 2.8 3.6 4.5 5.6
Model code 07 → Capacity=2.2kW
Working period
Pinch pipes
Pinch or tape pipes
— Pinch or tape pipes
Between outdoor unit
and the farthest indoor
unit ≥ 90m *3
Liquid pipe Gas pipe
9.52 (3/8) 19.05 (3/4)
9.52 (3/8) 19.05 (3/4)
9.52 (3/8) 19.05 (3/4)
Separation
Header *4
tube *4
UTR-H0906L
UTP-AX054A
UTR-H0908L
Gas pipe
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
24 30 36 45 54
7.1 9.0 11.2 12.5 14.0
Protection method