Table 8 Recommended Refrigerant Line Sizes; Table 9 Pipe Length And Condenser Elevation Relative To Evaporator; Table 10 Line Charges - Refrigerant Per 100 Ft. (30M) Of Type L Copper Tube; Table 11 Refrigerant Charge In Liebert Pre-Charged R-407C Line Sets - Liebert Mini-Mate2 MMD24E User Manual

Table 8 Recommended refrigerant line sizes
Equivalent
Length, ft (m)
50 (15.2)
100 (30.5)
150 (45.7)
1. Suction line and liquid line sizing based on < 3 psi pressure drop in each and
horizontal suction line refrigerant velocities >700FPM (3.6m/s).
2. Suction size should be reduced one pipe size for vertical riser sections to
maintain suction line velocity > 1000FPM (5.1m/s) for proper oil return.
Table 9 Pipe length and condenser elevation relative to evaporator
Nominal
System Size
Tons
2
3
Maximum recommended total equivalent pipe length is 150 ft (46m). Suction and liquid lines may require additional specialty
items when vertical lines exceed 20 ft. (6m) and/or condensing unit installation is more than 15 ft. (4.6m) below the evaporator.
Contact Emerson Application Engineering for assistance.
Table 10 Line charges - refrigerant per 100 ft. (30m) of Type L copper tube
Line Size,
O.D., in.
3/8
1/2
5/8
3/4
7/8
1-1/8
1-3/8
Table 11 Refrigerant charge in Liebert pre-charged R-407C line sets
Line Size, in.
3/8 liquid
5/8 or 7/8 suction
Table 12 Equivalent lengths for various pipe fittings, ft (m)
Copper Pipe
OD, in. Elbow Copper
1/2
5/8
3/4
7/8
1-1/8
1-3/8
1-5/8
Refrigerant trap = Four times equivalent length of pipe per this table
® ™
Liebert Mini-Mate2
2 Ton
Suction Liquid
7/8" 3/8"
7/8" 1/2"
7/8" 1/2"
Max. Equiv. Maximum PFH
Pipe Length Level Above
ft. (m) Evaporator, ft. (m)
150 (45) 40 (12)
150 (45) 50 (15)
R-407C, lb/100 ft. (kg/30m)
Liquid Line Suction Line
3.7 (1.7) —
6.9 (3.1) —
11.0 (5.0 0.4 (0.2)
15.7 (7.1) 0.6 (0.3)
23.0 (10.4) 1.0 (0.4)
— 1.7 (0.7)
— 2.7 (1.1)
Length, ft. (m) Charge R-407C, oz (kg)
15 (4.5)
30 (9)
15 (4.5)
30 (9)
90 Degree 90 Degree
Elbow Cast
0.8 (0.24) 1.3 (0.39)
0.9 (0.27) 1.4 (0.42)
1.0 (0.3) 1.5 (0.45)
1.45 (0.44) 1.8 (0.54)
1.85 (0.56) 2.2 (0.67)
2.4 (0.73) 2.9 (0.88)
2.9 (0.88) 3.5 (1.06)
3 Ton
Suction Liquid
7/8" 1/2"
2
1-1/8" 1/2"
2
1-1/8" 1/2"
Maximum PFH
Level Below
Evaporator, ft. (m)
15 (4.6)
15 (4.6)
5 (0.14)
10 (0.28)
5 (0.14)
10 (0.28)
45 Degree
Elbow Tee
0.4 (0.12) 2.5 (0.76) 0.26 (0.07)
0.5 (0.15) 2.5 (0.76) 0.28 (0.08)
0.6 (0.18) 2.5 (0.76)
0.8 (0.24) 3.6 (1.09)
1.0 (0.3) 4.6 (1.4) 0.48 (0.14)
1.3 (0.39) 6.4 (1.95) 0.65 (0.19)
1.6 (0.48) 7.2 (2.19) 0.72 (0.21)
22
Site Preparation and Installation
Gate Globe
Valve Valve
7.0 (2.13)
9.5 (2.89)
0.3 (0.09) 12.0 (3.65)
0.36 (0.1) 17.2 (5.24)
22.5 (6.85)
32.0 (9.75)
36.0 (10.97)
Angle
Valve
4.0 (1.21)
5.0 (1.52)
6.5 (1.98)
9.5 (2.89)
12.0 (3.65)
16.0 (4.87)
19.5 (5.94)