Site Preparation and Installation
23 Liebert
®
Mini-Mate2
™
Refrigerant Charge Requirements
Total R-407C refrigerant charge will be required only if units are evacuated during installation or
maintenance. For safe and effective operation, refer to pressures in 5.4.2 - Piping Connections and
Coolant Requirements.
Total Refrigerant = Units and Lines
Table 7 Line charges—refrigerant per 100 ft. (30m) of Type L copper tube
Line Size,
O.D., in.
R-407C, lb/100 ft. (kg/30m)
Liquid Line Suction Line
3/8 3.7 (1.7) —
1/2 6.9 (3.1) —
5/8 11.0 (5.0 0.4 (0.2)
3/4 15.7 (7.1) 0.6 (0.3)
7/8 23.0 (10.4) 1.0 (0.4)
1-1/8 — 1.7 (0.7)
1-3/8 — 2.7 (1.1)
Table 8 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
Table 9 Connection sizes and torque
Size OD Cu Model Tons Coupling Size Torque Ib-ft.
3/8 1 and 1.5 #6 10-12
5/8 1 and 1.5 #11 35-45
NOTE
If field-supplied refrigerant piping is installed, R-407C refrigerant must be added to the
system.
Table 10 Refrigerant charge
Unit Type
Model #
Charge R-407C *
oz (kg)60Hz
Self Contained-Air MM*12A/F 42 (1.19)
Self Contained-Water MM*14W/G 27 (0.77)
Split Evaporator-Air MM*12E/K 3 (0.085)
Self Contained-Air MM*18A/F 49 (1.39)
Self Contained-Water MM*20W/G 28 (0.79)
Split Evaporator-Air MM*18E/K 4 (0.11)
Split Condensing Unit PFH014A-_L7 134 (3.80)
Split Condensing Unit PFH020A-_L7 134 (3.80)
Self-contained DX units, split-system evaporators and split-system condensing units are pre-charged with R-407C refrigerant.
Use Table 11 to determine the charge contained in Liebert pre-charged R-407C line sets. Use Table 7 to determine the
charge to be added for field-fabricated refrigerant lines.
* For units with Hot Gas Reheat coil, add 18oz (0.51kg) refrigerant to listed values.
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