Copper Pipe
OD, in.
90 Degree
Elbow Copper
90 Degree
Elbow Cast
45 Degree
Elbow
Tee
Gate
Valve
Globe
Valve
Angle
Valve
1/2 0.8 (0.24) 1.3 (0.39) 0.4 (0.12) 2.5 (0.76) 0.26 (0.07) 7.0 (2.13) 4.0 (1.21)
5/8 0.9 (0.27) 1.4 (0.42) 0.5 (0.15) 2.5 (0.76) 0.28 (0.08) 9.5 (2.89) 5.0 (1.52)
3/4 1.0 (0.3) 1.5 (0.45) 0.6 (0.18) 2.5 (0.76) 0.3 (0.09) 12.0 (3.65) 6.5 (1.98)
7/8 1.45 (0.44) 1.8 (0.54) 0.8 (0.24) 3.6 (1.09) 0.36 (0.1) 17.2 (5.24) 9.5 (2.89)
1-1/8 1.85 (0.56) 2.2 (0.67) 1.0 (0.3) 4.6 (1.4) 0.48 (0.14) 22.5 (6.85) 12.0 (3.65)
1-3/8 2.4 (0.73) 2.9 (0.88) 1.3 (0.39) 6.4 (1.95) 0.65 (0.19) 32.0 (9.75) 16.0 (4.87)
1-5/8 2.9 (0.88) 3.5 (1.06) 1.6 (0.48) 7.2 (2.19) 0.72 (0.21) 36.0 (10.97) 19.5 (5.94)
Refrigerant trap = Four times equivalent length of pipe per this table
Table 2.6 Equivalent lengths for various pipe fittings, ft (m)
2.5.2 Pre-Charged Line Sets
Liebert® pre-charged line sets are available in 15 ft. (4.5m) and 30 ft. (9m) lengths (see Table 2.7 below).
NOTICE
Risk of improper handling and installation of pre-charged lines. Can cause kinks and similar damage to
lines.
Care must be taken to prevent kinking the pre-charged lines for 1-ton and 3.5-ton units.
Use tube benders and make all bends before making connections to either end of the pre-charged pipes.
Coil any excess tubing in a horizontal plane with the slope of the tubing toward the condensing unit. Use a
soft, flexible material to pack around the tubes when sealing openings in walls to prevent tube damage
and to reduce vibration transmission.
Line Size,
in.
Length,
ft. (m)
Charge R-407C,
lb-oz (kg)
3/8 liquid
15 (4.5) 0-5 (0.14)
30 (9) 0-10 (0.28)
5/8 or 7/8
suction
15 (4.5) 0-5 (0.14)
30 (9) 0-10 (0.28)
Table 2.7 Refrigerant charge in Liebert pre-charged R-407C line sets
2.5.3 Field-Fabricated Line Sets
All field-fabricated refrigeration piping should be copper piping, brazed using a brazing alloy with a
minimum temperature of 1350°F (732°C), such as Sil-Fos. Use a flow of dry nitrogen through the piping
during brazing to prevent formation of copper oxide scale inside the piping. Avoid soft solders such as
50/50 or 95/5.
Use the sweat adapter kits to terminate the piping at each unit end. Consult factory representatives to
obtain the proper sweat adapter kit. Liebert® PFH unit charge levels and coupling size on the next page
has PFH unit connection sizes. Use Recommended line sizes, OD Cu on page19 for recommended line
sizes.
Vertiv | Liebert PFH Installer/User Guide | 17
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