LG Multi V mini Engineering Manual page 67

Selecting Copper Tubing
Copper is the only approved refrigerant pipe material for use with
LG Multi V commercial air conditioning products. Hard-drawn or an-
nealed copper tubing is acceptable, and the designer chooses which
one to use.
• Drawn temper ACR copper tubing is available in sizes 3/8 thru
1-1/8 inches (ASTM B 280, clean, dry, and capped).
• Annealed temper ACR copper tubing is available in sizes 1/4 thru
1-1/8 inches (ASTM B 280, clean, dry, and capped).
Table 26: ACR Copper Tubing Material
Type
Class
Straight Lengths
Coils
Table 27: ACR Copper Tubing Dimensions/Physical Characteristics
Nominal Pipe Actual
OD (in) OD (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.
Design pressure = 551 psig.
Annealed (soft) and drawn temper tubing is suitable for use with fl ared and brazed fi ttings.
Annealed tubing is available in 50 ft. coils.
Seamless Phosphorous Deoxidized
UNS C12200 DHP
H58 Temper
O60 Temper
Drawn Temper
– –
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 DESIGN GUIDE
Choose the tube wall thickness to meet local codes, UL standards,
and it must be approved for an operating pressure of 551 psig. If
local codes do not specify wall thickness, LG suggests using tubing
sizes as specified in Table 26. When bending soft copper tub-
ing, use the largest radius bends wherever possible to reduce the
equivalent length of installed pipe. Be sure no traps or sags are
present when rolling out and installing soft copper tubing.
– 0.030
.00054 0.032
.00101 0.032
.00162 0.035
.00242 0.042
.00336 0.045
.00573 0.050
The type of tubing selected for use in a particular application is determined by the internal fl uid pressure
of the R410A refrigerant at the highest operating condition.
Source: The Copper Tube Handbook, 2010, Copper Development Association Inc., 260 Madison
Avenue, New York, NY 10016.
Annealed Temper
0.081 .00020
0.134 .00053
0.182 .00103
0.251 .00168
0.362 .00242
0.455 .00336
0.655 .00573
SYSTEM ENGINEERING
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