Installation guide
24 Outdoor Unit
Connection of Outdoor units
Refrigerant piping Installation
2 Unit
3 Unit
ARCNB21
ARCNB31
C
C
C
C
Outdoor units Model
Low Pressure Gas Pipe
High Pressure Gas PipeLiquid Pipe
O.D25.4(1)
I.D22.2(7/8)
I.D19.05(3/4)
120(4-23/32)
X2
O.D19.05(3/4)
I.D15.88(5/8)
I.D12.7(1/2)
110(4-11/32)
O.D25.4(1)
I.D22.2(7/8)
80(3-5/32)
O.D12.7(1/2)
I.D9.52(3/8)
70(2-3/4)
453(17-27/32)
491(19-9/32)
111
(4-3/8)
I.D28.58(1-1/8)
I.D34.9(1-3/8)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
I.D25.4(1)
I.D31.8(1-1/4)
I.D25.4(1)
I.D28.58(1-1/8)
I.D31.8(1-1/4)
130(5-1/8)
416(16-3/8)
408(16-1/16)
111(4-3/8)
I.D.38.1(1-1/2)
I.D.34.9(1-3/8)
O.D.34.9(1-3/8)
I.D.41.3(1-5/8)
I.D.31.8(1-1/4)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.28.58(1-1/8)
I.D.22.2(7/8)
331(13-1/32)
314(12-3/8)
O.D.19.05(3/4)
I.D.19.05(3/4)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.15.88(5/8)
I.D.22.2(7/8)
I.D.12.7(1/2)
I.D.12.7(1/2)
I.D.9.52(3/8)
70(2-3/4)
83(3-9/32)
O.D.19.05(3/4)
O.D.19.05(3/4)
I.D.15.88(5/8)
I.D.22.2(7/8)
I.D.12.7(1/2)
334(13-5/32)
281(11-1/16)
83(3-9/32)
I.D.34.9(1-3/8)
O.D.34.9(1-3/8)
125(4-29/32)
406(16)
353(13-29/32)
111(4-3/8)
I.D34.9(1-1/8)
I.D.28.58(1-1/8)
I.D.41.3(1-5/8)
I.D38.1(1-1/2)
I.D.41.3(1-5/8)
471(18-17/32)
517(20-11/32)
125(4-29/32)
I.D41.3(1-5/8)
I.D38.1(1-1/2)
I.D38.1(1-1/2)
I.D34.9(1-3/8)
I.D34.9(1-3/8)
I.D34.9(1-3/8)
I.D28.58(1-1/8)
I.D19.05
(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
120(4-23/32)
I.D19.05
(3/4)
I.D22.2(7/8)
O.D28.58(1-1/8)
120(4-23/32)
O.D15.88(5/8) I.D9.52(3/8)
I.D12.7(1/2)
110(4-11/32)
O.D12.7(1/2)
I.D6.35(1/4)
I.D9.52(3/8)
110(4-11/32)
O.D.19.05(3/4)
I.D.12.7(1/2)
I.D.15.88(5/8)
X2
110 (4- 11/ 32)
130(5-1/8)
I.D12.7(1/2)
I.D19.05
(3/4)
I.D22.2(7/8)
I.D41.3(1-5/8)
I.D38.1(1-1/2)
I.D41.3(1-5/8)
O.D34.9(1-3/8)
O.D38.1(1-1/2)
O.D28.58(1-1/8)
O.D15.88(5/8)
90(3-17/32)
70(2-3/4)
120(4-23/32)
120(4-23/32)
I.D19.05(3/4)
I.D15.88(5/8)
O.D22.2(7/8)
I.D28.58(1-1/8)
I.D22.2(7/8)
For more information, refer accessory installation manual.
(Unit : mm(inch))
Y branch
A
B
To outdoor unit
To branch piping or indoor unit
A
B
Facing
upwards
Facing
downwards
Within ± 3° Within ± 3°
Viewed from point A
in direction of arrow
Within +/- 10