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1,MFL67221438,영영 2018. 10. 4. 영영 11:29 Page 11
REFRIGERANT PIPING INSTAL-
LATION
Precautions on Pipe connection / Valve operation
Pipe connection is done by connecting from the end of the pipe to the
branching pipes, and the refrigerant pipe coming out of the outdoor
unit is divided at the end to connect to each indoor unit. Flare connec-
tion for the indoor unit, and welding connection for the outdoor pipe
and the branching parts.
- Use hexagonal wrench to open/close the valve.
Liquid pipe
Gas pipe
WARNING
!
• Always careful not to leak the refrigerant during welding.
• The refrigerant generates poisonous gas harmful to human body
if combusted.
• Do not perform welding in a closed space.
• Be sure to close the cap of the service port to prevent gas leak-
age after the work.
CAUTION
!
Please block the pipe knock outs of the front and side panels after
installing the pipes.
(Animals or foreign objects may be brought in to damage wires.)
Connection of Outdoor units
When installing ODU series, refer below picture.
A
(Master)
A≥B≥C≥D
① IDU side connection pipe
② ODU to ODU connection pipe (1st branch)
③ ODU to ODU connection pipe (2st branch)
④ ODU to ODU connection pipe (3rd brach)
Service Port
B
C
D
(Slave1)
(Slave2)
(Slave3)
2, 3, 4 Outdoor Units
Outdoor units
Model
O.D.15.88
I.D.15.88
C
I.D.19.05
ARCNN21
C
2 Unit
I.D.22.2 O.D.19.05
C
C
O.D.19.05
I.D.15.88
C
3 Unit
ARCNN31
I.D.22.2
I.D.19.05
C
I.D.28.58 O.D.22.2
O.D.19.05
A
ARCNN41
4 Unit
I.D.22.2
I.D.19.05
C
I.D.31.8
I.D.28.58
For more information, refer accessory installation manual.
Y branch
A
To outdoor unit
A
To branch piping or indoor unit
B
Facing
Facing
downwards
upwards
Within ± 3°
Within ± 3°
Caution
1
Use the following materials for refrigerant piping.
- Material: Seamless phosphorous deoxidized copper pipe
- Wall thickness : Comply with the relevant local and national regula-
tions for the designed pressure 3.8 MPa (551 psi).
We recommend the following table as the mini-
mum wall thickness.
Outer diameter
6.35
9.52
12.7
15.88
19.05
22.2
[mm(inch)]
(1/4)
(3/8)
(1/2)
(5/8)
(3/4)
(7/8)
Minimum thick-
0.8
0.8
0.8
0.99
0.99
0.99
ness [mm(inch)]
(0.03)
(0.03)
(0.03)
(0.04)
(0.04)
(0.04)
2
Commercially available piping often contains dust and other materi-
als. Always blow it clean with a dry inert gas.
3
Use care to prevent dust, water or other contaminants from entering
the piping during installation.
4
Reduce the number of bending portions as much as possible, and
make bending radius as big as possible.
5
Always use the branch piping set shown below, which are sold sep-
arately.
Y branch
4 branches 7 branches 10 branches
ARBLB01621, ARBLB03321,
ARBL054
ARBLB07121, ARBLB14521,
ARBL104
ARBLB23220
11
Liquid Pipe
Gas Pipe
I.D. 19.05
I.D.22.2
O.D. 28.58
I.D.34.9
331
416
314
408
I.D.15.88
I.D.28.58
I.D.28.58
I.D.12.7
I.D.9.52
83
111
I.D.22.2
I.D.31.8
I.D.34.9
I.D.41.3 I.D.38.1 O.D.34.9
I.D.12.7
I.D.15.88
I.D.28.58
O.D.12.7
I.D.9.52
70
130
I.D.22.2
O.D.28.58
I.D.34.9
O.D.15.88
I.D. 19.05
I.D.41.3 O.D.34.9
O.D.34.9 I.D.28.58
I.D.12.7
O.D.19.05
I.D.22.2
125
334
341
281
298
83
I.D.19.05
I.D.41.3
I.D.34.9
111
I.D.15.88
I.D.12.7
I.D.28.58
I.D.53.98
I.D. 44.5
O.D.41.3
O.D.15.88
I.D.19.05
I.D.22.2
O.D.28.58
I.D.34.9
I.D.22.2
I.D.28.58
O.D.41.3
I.D.44.5
I.D.53.98
334
415
281
375
I.D.19.05
83
134
I.D.44.48 I.D.53.98
I.D.41.3
I.D.15.88
I.D.12.7
O.D.22.2
I.D.28.58
O.D.15.88
I.D.19.05
I.D.22.2
O.D.28.58
I.D.34.9
Within +/- 10
B
Viewed from point A
in direction of arrow
25.4
28.58
31.8
34.9
38.1
41.3
44.45
53.98
(1)
(1-1/8)
(1-1/4)
(1-3/8)
(1-1/2)
(1-5/8)
(1-3/4)
(2-1/8)
0.99
0.99
1.1
1.21
1.35
1.43
1.55
2.1
(0.04)
(0.04)
(0.04)
(0.05)
(0.05)
(0.06)
(0.06)
(0.08)
Header
ARBL057
ARBL1010
ARBL107
ARBL2010
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