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Refrigerant Piping
Due to our policy of continuous product innovation, some specifications may change without notification.
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Table 43:ACR Copper Tubing Dimensions and Physical Characteristics
1-4
Nominal Pipe
Outside
Diameter (in)
Actual Outside
Diameter (in)
Drawn Temper Annealed Temper
Nominal Wall
Thickness (in)
Weight (lb/ft)
Cubic ft per
Linear ft
Nominal Wall
Thickness (in)
Weight (lb/ft)
Cubic ft per
Linear ft
1/4 0.250 -- -- -- 0.030 0.081 .00020
3/8 0.375 0.030 0.126 .00054 0.032 0.134 .00053
1/2 0.500 0.035 0.198 .00101 0.032 0.182 .00103
5/8 0.625 0.040 0.285 .00162 0.035 0.251 .00168
3/4 0.750 0.042 0.362 .00242 0.042 0.362 .00242
7/8 0.875 0.045 0.455 .00336 0.045 0.455 .00336
1-1/8 1.125 0.050 0.655 .00573 0.050 0.655 .00573
1
All dimensions provided are in accordance with ASTM B280 – Standard.
2
Design pressure = 551 psig.
3
ACR Tubing is available as hard drawn or annealed (soft) and is suitable for use with R410A refrigerant.
4
The Copper Tube Handbook, 2010, Copper Development Association Inc., 260 Madison Avenue, New York, NY 10016.
Field-Supplied Copper Tubing
Type ACR copper is the only approved refrigerant pipe material for use with LG Multi V commercial air conditioning products. ACR rated tub-
ing 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 a maximum operating pressure of 551 psi. 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.
• Commercially available piping often contains dust and other materials. Always blow piping clean with a dry inert gas.
• Prevent dust, water or other contaminants from entering the piping during installation.
OD (in) 1/4 3/8 1/2 5/8 3/4 7/8 1-1/8 1-3/8
Material Rigid or Soft ACR rated for R410A Rigid or Solid ACR rated for R410A
Min. Bend
Radius (in)
.563 .9375 1.5 2.25 3.0 3.0 3.5 4.0
Min. Wall
Thickness (in)
.03 .03 .035 .040 .042 .045 .050 .050
Table 41: ACR Copper Tubing Material.
Type Seamless Phosphorous Deoxidized
Class UNS C12200 DHP
Straight Lengths H58 Temper
Coils O60 Temper
Table 42: Piping Tube Thicknesses.
REFRIGERANT PIPING INSTALLATION
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