LG MULTI V WATER II ARWN Series Installation Manual page 22

Refrigerant piping installation
Connection of Outside units
Outdoor units
2 Unit
3 Unit
* Install the branch pipe between outside units so that the outlet pipe is parallel to the surface.
Within +/- 10
Viewed from point A
in direction of arrow
When installing the branch pipe vertically between the outside units, the refrigerant can be
uneven between the outside units, leading to compressor burn and reduced capacity
22 Outside Unit
Model
I.D.28.58(1-1/8)
I.D.31.8(1-1/4)
ARCNN21
A
I.D.38.1(1-1/2)
I.D.41.3(1-5/8)
130(5-1/8)
I.D38.1(1-1/2)
I.D.41.3(1-5/8)
ARCNN31
I.D.41.3(1-5/8)
O.D.34.9(1-3/8)
125(4-29/32)
Execute the
welding while
pouring nitrogen
Do not cut for
70mm or less
Gas pipe
416(16-3/8)
408(16-1/16)
I.D.28.58(1-1/8)
I.D.22.2(7/8) 111(4-3/8)
I.D.34.9(1-3/8)
I.D.28.58(1-1/8)
O.D.34.9(1-3/8)
I.D.22.2(7/8)
O.D.28.58(1-1/8)
I.D.19.05(3/4)
120(4-23/32)
406(15-31/32)
353(13-29/32)
I.D34.9(1-3/8) I.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)
I.D.19.05(3/4)
120(4-23/32)
[mm(inch)]
Liquid pipe
331(13-1/32)
314(12-3/8)
I.D.15.88(5/8) I.D.15.88(5/8)
I.D.12.7(1/2)
I.D.9.52(3/8)
I.D.19.05(3/4)
I.D.12.7(1/2) I.D.15.88(5/8)
I.D.12.7(1/2)
I.D.22.2(7/8) O.D.19.05(3/4)
O.D.15.88(5/8)
70(2-3/4)
110(4-11/32)
334(13-5/32)
281(11-1/16)
O.D.19.05(3/4) O.D.19.05(3/4)
I.D.22.2(7/8)
I.D.15.88(5/8)
I.D.
9.52(3/8)
I.D. 15.88(5/8)
O.D. 12.7(1/2)
O.D. 19.05(3/4)
I.D. 12.7(1/2)
X2
110(4-11/32) 110(4-11/32)
83(3-9/32)
I.D.9.52(3/8)
83(3-9/32)
I.D.12.7(1/2)
I.D. 6.35(1/4)