Advertisement
REFRIGERANT PIPING
INSTALLATION
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
connection for the indoor unit, and welding connection for the outdoor
pipe and the branching parts.
- Use hexagonal wrench to open/close the valve.
Service Port
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
leakage 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
B
(Master)
(Slave1)
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)
C
D
(Slave2)
(Slave3)
2, 3, 4 Outdoor Units
Outdoor units
Model
C
I.D.19.05
ARCNN21
C
2 Unit
C
C
O.D.19.05
C
3 Unit
ARCNN31
I.D.22.2
C
I.D.28.58 O.D.22.2
ARCNN41
4 Unit
A
I.D.22.2
C
I.D.31.8
For more information, refer accessory installation manual.
Y branch
A
A
To outdoor unit
B
To branch piping or indoor unit
Facing
Facing
downwards
upwards
CAUTION
!
Y-branches between the outside units must be installed
horizontally.
Caution
1
Use the following materials for refrigerant piping.
- Material: Seamless phosphorous deoxidized copper pipe
- Wall thickness : Comply with the relevant local and national
regulations for the designed pressure 3.8 MPa
(551 psi). We recommend the following table as
the minimum wall thickness.
Outer diameter
6.35
9.52
12.7
15.88
19.05
[mm(inch)]
(1/4)
(3/8)
(1/2)
(5/8)
(3/4)
Minimum thickness
0.8
0.8
0.8
0.99
0.99
[mm(inch)]
(0.03)
(0.03)
(0.03)
(0.04)
(0.04)
2
Commercially available piping often contains dust and other
materials. 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
separately.
Y branch
ARBLB01621, ARBLB03321,
ARBLB07121, ARBLB14521,
ARBLB23220
Liquid Pipe
Gas Pipe
O.D.15.88
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.15.88
I.D.28.58
I.D.28.58
I.D.12.7
I.D.9.52
83
I.D.22.2
I.D.31.8
I.D.34.9
I.D.22.2 O.D.19.05
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
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
I.D.15.88
125
334
341
281
298
83
I.D.19.05
I.D.41.3
I.D.34.9
I.D.19.05
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
O.D.19.05
I.D.22.2
I.D.28.58
O.D.41.3
I.D.44.5
I.D.53.98
334
415
281
375
83
I.D.19.05
I.D.19.05
I.D.44.48 I.D.53.98
I.D.41.3
I.D.15.88
I.D.12.7
I.D.28.58
O.D.22.2
I.D.28.58
I.D.22.2
O.D.28.58
I.D.34.9
O.D.15.88
I.D.19.05
Within +/- 10
B
Viewed from point A
in direction of arrow
22.2
25.4
28.58
31.8
34.9
38.1
41.3
44.45
(7/8)
(1)
(1-1/8)
(1-1/4)
(1-3/8)
(1-1/2)
(1-5/8)
(1-3/4)
0.99
0.99
0.99
1.1
1.21
1.35
1.43
1.55
(0.04)
(0.04)
(0.04)
(0.04)
(0.05)
(0.05)
(0.06)
(0.06)
Header
4 branches 7 branches 10 branches
ARBL054
ARBL057
ARBL1010
ARBL104
ARBL107
ARBL2010
11
111
I.D.34.9
111
I.D.34.9
134
53.98
(2-1/8)
2.1
(0.08)
Advertisement
