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Refrigerant piping installation
Slave
Outside Unit
Master
Outside Unit
Slave1
Outside
Unit
Slave2
Outside
Unit
Main
Outside Unit
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
2
).
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.
Connecting
branch pipe
Combination specification Gas pipe Liquid pipe
Do not cut for
70mm or less
Execute the welding
while pouring
nitrogen
ARCNN20
[mm(inch)]
401(15-25/32)
331(13-1/32)
24
(31/32)
80(3-5/32)
73(2-7/8)
O.D12.7(1/2)
I.D12.7(1/2)
I.D12.7(1/2)
I.D12.7(1/2)
I.D9.52(3/8)
I.D9.52(3/8)
I.D15.88(5/8)
I.D19.05(3/4)
I.D19.05(3/4)
I.D22.2(7/8)
473(18-5/8)
363(14-9/32)
38
(1-1/2)
I.D28.58(1-1/8)
O.D28.58(1-1/8)
I.D28.58(1-1/8)
I.D28.58(1-1/8)
I.D19.05(3/4)
I.D19.05(3/4)
I.D19.05(3/4)
I.D15.88(5/8)
I.D31.8(1-1/4)
I.D34.9(1-3/8)
O.D34.9(1-3/8)
75(2-15/16) 83(3-9/32)
1.
8
3
.D.I
115(4-17/32)
I.D22.2(7/8)
I.D22.2(7/8)
2 Outside Units 3 Outside Units
Connection of High/Low Pressure Common pipe
2 outside units
Connection of Outside units
22 Outside Unit
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