Technical data

Refrigerant Piping
Liebert
®
Mini-Mate2
™
31
10.0 REFRIGERANT PIPING
Table 22 Refrigerant charge
Model #
R-407C, oz (kg)
60Hz 50Hz
MM*60E MM*59E 4 (0.11)
MM*60K MM*59K 4 (0.11)
MC*65A MC*64A 432 (12.3)
MC*69W MC*68W 94 (2.7)
PFH067A-_L7 PFH066A-_L7 426 (12.1)
PFH067A-_H7 PFH066A-_H7 827 (23.4)
PFHZ67A-_L7 PFHZ66A-_L7 827 (23.4)
All evaporator units and condensing units are fully factory-charged with refrigerant. If field-supplied refrigerant piping is
installed, refrigerant must be added; refer to Table 25 to determine the additional charge.
Table 23 Recommended refrigerant line sizes
Equivalent Pipe
Length, ft (m)
Liquid Suction
50 (15) 1/2" 1-1/8"
100 (30.5) 5/8" 1-1/8"
150 (45.7) 5/8" 1-3/8"
Suction line and liquid line sizing based on < 3 psi pressure drop in each and suction line refrigerant velocities
>1000FPM (5.1m/s) for proper oil return.
Table 24 Pipe length and condenser elevation relative to evaporator
Nominal System
Size Tons
Max. Equiv. Pipe
Length, ft. (m)
Maximum PFH Level
Above Evaporator, ft. (m)
Maximum PFH Level
Below Evaporator, ft. (m)
5 150 (45) 50 (15) 15 (4.6)
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 25 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)