Technical data

Refrigerant Piping
Liebert
®
Mini-Mate2
™
29
Figure 24 Refrigerant piping diagram
Table 18 Refrigerant charge in Liebert pre-charged R-407C line sets
Line Size, in. Length, ft. (m) Charge R-407C, oz (kg)
3/8 liquid
15 (4.5) 5 (0.14)
30 (9) 10 (0.28)
5/8 or 7/8 suction
15 (4.5) 5 (0.14)
30 (9) 10 (0.28)
Table 19 Equivalent lengths for various pipe fittings, ft (m)
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
Evaporator
Evaporator
Condensing
Unit
NOTE
When installing remote condensing units below the
evaporator, the suction gas line should be trapped with
an inverted trap to the height of the evaporator . This
prevents refrigerant migration to the compressors
during off cycles . Maximum recommended vertical
level drop to condensing unit is 15 ft. (4.6m) .
Pitch down 1/2" (13mm) per 10 ft. (3m)
Suction Line Piping
Condensing Unit Above Evaporator
Traps recommended at the base of riser exceeding
5 ft (1.5m) and every 20 feet (6m) of vertical rise.
Suction Line Piping
Condensing Unit
Below Evaporator
Condensing
Unit
Pitch down 1/2" (13mm) per 10 ft. (3m)
See Table 17 for recommended maximum
vertical rise above/fall below evaporator.