10 REFRIGERANT PIPING
Model #
Charge R-407C oz (kg)
60Hz 50Hz
MM*24E/K — 7 (0.198)
MM*36E/K MM*35E/K 7 (0.198)
MC*24AL_H7 — 134 (3.80)
MC*36AL_H7 MC*35AL_H7 213 (6.04)
MC*26W__H7 — 41 (1.16)
MC*38W__H7 MC*37W__H7 54 (1.54)
PFH027-_L7 — 134 (3.80)
PFH027-_H7 — 213 (6.04)
PFHZ27-_L7 — 213 (6.04)
PFH037-_L7 PFH036-_L7 213 (6.04)
PFH037-_H7 PFH036-_H7 426 (12.08)
PFHZ37-_L7 PFHZ36-_L7 426 (12.08)
Table 10.1 Refrigerant charge
Equivalent
Length, ft (m)
2 Ton 3 Ton
Suction Liquid Suction Liquid
50 (15.2) 7/8" 3/8" 7/8" 1/2"
100 (30.5) 7/8" 1/2" 1-1/8"
2
1/2"
150 (45.7) 7/8" 1/2" 1-1/8"
2
1/2"
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 10.2 Recommended refrigerant line sizes
Nominal System Size Tons Max. Equiv. Pipe Length ft. (m)
Maximum PFH Level Above
Evaporator, ft. (m)
Maximum PFH Level Below
Evaporator, ft. (m)
2 150 (45) 40 (12) 15 (4.6)
3 150 (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 Vertiv™ Application Engineering for
assistance.
Table 10.3 Pipe length and condenser elevation relative to evaporator
Vertiv | Liebert Mini-Mate2—2 and 3 ton Technical Data Manual | 59
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