LG MULTI F LMU18CHV Installation Manual page 27

F
MULTI
F
MULTI MAX
Selecting Field-Supplied Copper Tubing
Type ACR copper is the only approved refrigerant pipe material for use with LG Multi V S air conditioning products. ACR rated tubing is the
only type that ships with yellow caps. Approved tubing for use with Multi V products will be marked "R410 RATED" along the length of the
tube.
• Drawn temper (rigid) ACR copper tubing is available in sizes 3/8 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).
• Annealed temper (soft) ACR copper tubing is available in sizes 1/4 through 2-1/8 inches (ASTM B 280, clean, dry, and capped).
Tube wall thickness should meet local code requirements and be approved for an operating pressure of 551 psi. If local code does not
use the largest radii possible to reduce the equivalent length of installed pipe; also, bending radii greater than ten (10) pipe diameters can minimize
pressure drop. Be sure no traps or sags are present when rolling out soft copper tubing coils.
Table 14: ACR Copper Tubing Material
Type
Class
Straight Lengths
Coils
Table 12: Piping Tube Thicknesses
OD (in) 1/4
Material
Min. Bend
.563
Radius (in)
Min. Wall
.031
Thickness (in)
Table 13: 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
All dimensions provided are in accordance with ASTM B280 – Standard.
1
Design pressure = 551 psig.
2
ACR Tubing is available as hard drawn or annealed (soft) and are suitable for use with R410A refrigerant.
3
The Copper Tube Handbook, 2010, Copper Development Association Inc., 260 Madison Avenue, New York, NY 10016.
4
• Commercially available piping often contains dust and other materials. Always blow it clean with a dry inert gas.
• Prevent dust, water or other contaminants from entering the piping during installation. Contaminants can cause mechanical failure.
GENERAL INSTALLATION GUIDELINES
Seamless Phosphorous Deoxidized
UNS C12200 DHP
H58 Temper
O60 Temper
3/8 1/2
.9375 1.5
.031 .031
Drawn Temper
Nominal Wall
Weight (lb/ft)
Thickness (in)
-- --
0.030 0.126
0.035 0.198
0.040 0.285
0.042 0.362
0.045 0.455
0.050 0.655
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.
Piping Materials and Handling
5/8 3/4 7/8
3.0 3.0 3.0
.039 .042 .045
1-4
Cubic ft per Nominal Wall
Linear ft Thickness (in)
-- 0.030
.00054 0.032
.00101 0.032
.00162 0.035
.00242 0.042
.00336 0.045
.00573 0.050
1-1/8 1-3/8 1-5/8
3.5 4.0 4.5
.050 .050 .050
Annealed Temper
Cubic ft per
Weight (lb/ft)
Linear ft
0.081 .00020
0.134 .00053
0.182 .00103
0.251 .00168
0.362 .00242
0.455 .00336
0.655 .00573
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