15
ENGLISH
A
≥
B
≥
C
①
IDU side connection pipe
②
ODU to ODU connection pipe (1st branch)
③
ODU to ODU connection pipe (2nd branch)
(Master)
A
B
(Slave1)
C
(Slave2)
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
[mm(inch)]
6.35
(1/4)
9.52
(3/8)
12.7
(1/2)
15.88
(5/8)
19.05
(3/4)
22.2
(7/8)
25.4
(1)
28.58
(1-1/8)
31.8
(1-1/4)
34.9
(1-3/8)
38.1
(1-1/2)
41.3
(1-5/8)
44.45
(1-3/4)
53.98
(2-1/8)
Minimum
thickness
[mm(inch)]
0.8
(0.03)
0.8
(0.03)
0.8
(0.03)
0.99
(0.04)
0.99
(0.04)
0.99
(0.04)
0.99
(0.04)
0.99
(0.04)
1.1
(0.04)
1.21
(0.05)
1.35
(0.05)
1.43
(0.06)
1.55
(0.06)
2.1
(0.08)
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.
2, 3 Outdoor Units
For more information, refer accessory installation manual.
Y branch
A
B
To outdoor unit
To branch piping or indoor unit
A
B
Facing
upwards
Facing
downwards
Viewed from point A
in direction of arrow
/- 10
Outdoor Units
Model
Pipe
2 Unit
Ⓐ
ARCNN21
Liquid Pipe
O.D 15.88(5/8)
I.D 15.88(5/8)
I.D 19.05(3/4)
I.D 22.2(7/8)
O.D 15.88(5/8)
I.D 19.05(3/4)
I.D 12.7(1/2)
I.D 15.88(5/8)
O.D 12.7(1/2)
I.D 9.52(3/8)
I.D 12.7
(1/2)
I.D 9.52
(3/8)
83
(3-9/32)
O.D 19.05(3/4)
70(2-3/4)
I.D 15.88(5/8)
331(13-1/32)
314(12-3/8)
I.D 19.05(3/4)
Gas Pipe
I.D 22.2
(7/8)
I.D 28.58(1-1/8)
I.D 31.8(1-1/4)
I.D 28.58
(1-1/8)
I.D 34.9(1-3/8)
I.D 41.3
(1-5/8)
130(5-1/8)
I.D 38.1
(1-1/2)
I.D 22.2
(7/8)
O.D 28.58
(1-1/8)
I.D 34.9(1-3/8)
111
(4-3/8)
O.D 34.9(1-3/8)
I.D 28.58(1-1/8)
I.D 22.2(7/8)
O.D 28.58
(1-1/8)
416(16-3/8)
408(16-1/16)
I.D 34.9
(1-3/8)
3 Unit
Ⓑ
ARCNN31
Liquid Pipe
O.D 19.05(3/4)
I.D 15.88(5/8)
I.D 22.2
(7/8)
O.D 19.05(3/4)
I.D 22.2(7/8)
I.D 15.88(5/8)
I.D 12.7(1/2)
I.D 28.58(1-1/8)
O.D 15.88(5/8)
I.D 19.05(3/4)
I.D 19.05
(3/4)
I.D 19.05
(3/4)
334(13-5/32)
281(11-1/16)
I.D 12.7(1/2)
O.D 19.05(3/4)
I.D 22.2(7/8)
83
(3-9/32)
Gas Pipe
O.D 34.9(1-3/8) I.D 28.58(1-1/8)
I.D 41.3(1-5/8)
O.D 34.9(1-3/8)
I.D 41.3(1-5/8)
I.D 53.98(2-1/8)
O.D 41.3(1-5/8)
I.D 22.2(7/8)
O.D 28.58(1-1/8)
I.D 34.9(1-3/8)
I.D 28.58(1-1/8)
I.D 34.9
(1-3/8)
111
(4-3/8)
I.D 44.5(1-3/4)
341(13-7/16)
125(4-29/32)
298(11-23/32)
Y branch
Header
4 branches
7 branches 10 branches
ARBLN01621, ARBLN03321,
ARBLN07121, ARBLN14521,
ARBLN23220
ARBL054
ARBL057
ARBL1010
ARBL104
ARBL107
ARBL2010
6
If the diameters of the branch piping of the designated refrigerant
piping differs, use a pipe cutter to cut the connecting section and
then use an adapter for connecting different diameters to connect
the piping.
7
Always observe the restrictions on the refrigerant piping (such as
rated length, difference in height, and piping diameter).
Failure to do so can result in equipment failure or a decline in
heating/cooling performance.
8
A second branch cannot be made after a header. (These are shown
by .)
Connection of Outdoor units
When installing ODU series, refer below picture.
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.)
CAUTION
!
Y-branches between the outside units must be installed
horizontally.
