LG LMN078HVT Installation & Maintenance page 24

GENERAL INSTALLATION GUIDELINES
Refrigerant Piping
Selecting Field-Supplied Copper Tubing
Copper is the only approved refrigerant pipe material for use with Duct Free System products, and LG recommends seamless phosphorous
deoxidized ACR type copper pipe, hard-drawn rigid type "K" or "L", or annealed-tempered, copper pipe.
• 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
specify wall thickness, LG suggests using tube thickness per table below. When bending tubing, try to keep the number of bends to a minimum, and
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.
Type
Class
Straight Lengths
Coils
OD (in)
1/4
Material
Rigid Type "K" or "L" and Soft ACR Acceptable Rigid Type "K" or "L" Only
Min. Bend
.563
Radius (in)
Min. Wall
.03
Thickness (in)
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.
24
Table 13: ACR Copper Tubing Material
Seamless Phosphorous Deoxidized
UNS C12200 DHP
H58 Temper
O60 Temper
Table 14: Piping Tube Thicknesses
3/8 1/2
.9375 1.5
.03 .035
Table 15: ACR Copper Tubing Dimensions and Physical Characteristics
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.
5/8 3/4 7/8
2.25 3.0 3.0
.040 .042 .045
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
F
MULTI
F
MULTI MAX
1-1/8 1-3/8 1-5/8
3.5 4.0 4.5
.050 .050 .050
1-4
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