LG MULTI V WATER II ARWB Serie Manual De Instalación página 22

Refrigerant piping installation
Connection of High/Low Pressure Common pipe
Slave
Outside Unit
2 Outside Units
1) For the high/low pressure common pipe, connect both master outside unit and slave outside units to the pipe by using
elbows.
2) For cutting the pipe, connect the high/low pressure common pipe after removing burrs, dusts and foreign material within
the pipe. Otherwise, the product may not operate due to sludge within the pipe.
3) For the working part leakage test, apply the nitrogen gas pressure of 3.8MPa (38.7kgf/cm
4) The vacuum criteria is to maintain the vacuum level to less than 5 Torr 1 hour after reaching 5 Torr. (Execute the vacuum
work again when it is below the criteria.)
5) Open the valve with the hexagon wrench.
Connection of Outside units
2 outside units
Combination specification
22 Outside Unit
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Master
Outside Unit
Connecting
branch pipe
Do not cut for
70mm or less
I.D28.58(1-1/8)
I.D19.05(3/4)
ARCNN20
38
(1-1/2)
I.D22.2(7/8)
I.D15.88(5/8)
75(2-15/16)
Slave2
Outside
Unit
Slave1
Outside
Unit
3 Outside Units
2 ).
Gas pipe
Execute the welding
while pouring
nitrogen
I.D28.58(1-1/8)
I.D28.58(1-1/8)
I.D34.9(1-3/8)
24
(31/32)
I.D31.8(1-1/4)
363(14-9/32)
473(18-5/8)
I.D22.2(7/8)
I.D19.05(3/4)
O.D28.58(1-1/8)
I.D19.05(3/4) . I . D 8 3 1 .
O.D34.9(1-3/8)
83(3-9/32)
115(4-17/32)
Main
Outside Unit
[mm(inch)]
Liquid pipe
I.D12.7(1/2)
I.D19.05(3/4)
I.D12.7(1/2)
I.D9.52(3/8)
I.D15.88(5/8)
I.D12.7(1/2)
331(13-1/32)
401(15-25/32)
I.D19.05(3/4) I.D22.2(7/8)
I.D9.52(3/8) O.D12.7(1/2)
80(3-5/32)
73(2-7/8)