Selecting Copper Piping - LG MULTI F Installation Manual
Multi-zone heat pump systems
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Selecting Field-Supplied Copper Piping
Always follow local codes when selecting and installing copper pipe and piping system components.
Approved piping for use with LG HVAC products will be marked "R410 RATED" along the length of the pipe. Piping wall thickness must meet
local code requirements and be approved for a maximum operating pressure of 551 psi. When bending piping, try to keep the number of
bends to a minimum, and use the largest radii possible to reduce the equivalent length of installed piping; also, bending radii greater than ten
(10) piping diameters can minimize pressure drop. Be sure no traps or sags are present.
For Multi-Zone Split Systems
Use ACR copper piping rated at the system working pressure (rated for R410A refrigerant).
Always properly support the piping as per the instructions on page 43.
Table 14: ACR Rated Copper Tubing Material.
Type
Class
Straight Lengths
Coils
Table 15: ACR Rated Piping Wall Thicknesses.
OD (in)
Material
Rigid or Soft ACR Rated for R410A
Min. Bend Radius (in)
Min. Wall Thickness (in)
Table 16: ACR Copper Tubing Dimensions and Physical Characteristics
Nominal Pipe
Actual Outside
Outside
Diameter (in)
Diameter (in)
1/4
0.250
3/8
0.375
1/2
0.500
5/8
0.625
3/4
0.750
7/8
0.875
1-1/8
1.125
1-3/8
1.375
1-5/8
1.625
1
All dimensions provided are in accordance with ASTM B280 – Standard.
Design pressure = 551 psig.
2
The Copper Tube Handbook, 2016, Copper Development Association Inc., 260 Madison Avenue, New York, NY 10016.
3
• Commercially available piping often contains dust and other materials. Always blow it clean with a dry nitrogen.
• Prevent dust, water or other contaminants from entering the piping during installation.
Seamless Phosphorous Deoxidized
1/4
3/8
1/2
0.563
0.9375
1.5
0.03
0.03
0.03
Tempered (Hard Drawn)
Nominal Wall
Weight (lb/ft)
Thickness (in)
--
0.030
0.035
0.040
0.042
0.045
0.050
0.055
0.060
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
SELECTING COPPER PIPING
UNS C12200 DHP
H58 Temper
O60 Temper
5/8
3/4
Rigid or Solid ACR Rated for R410A
2.25
3.0
0.03
0.03
.
1-3
Cubic ft per
Linear ft
--
--
0.126
0.00054
0.198
0.00101
0.285
0.00162
0.362
0.00242
0.455
0.00336
0.655
0.00573
0.884
0.00875
1.14
0.0124
7/8
1-1/8
1-3/8
3.0
3.5
0.03
0.03
0.04
Annealed (Soft)
Nominal Wall
Weight (lb/ft)
Thickness (in)
0.030
0.081
0.032
0.134
0.032
0.182
0.035
0.251
0.042
0.362
0.045
0.455
0.050
0.655
0.055
0.884
0.060
1.14
1-5/8
4.0
4.5
0.050
Cubic ft per
Linear ft
0.00020
0.00053
0.00103
0.00168
0.00242
0.00336
0.00573
0.00875
0.0124
37
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