Emerson PFH020A-L, User Manual

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Suction
53 - 95 PSIG
(365 to 655 kPa)
Discharge
(At Design Ambient)
280 psig (1930 kPa)
High-Pressure Cutout 400 psig (2760 kPa)
Table 2.13 Design refrigerant pressures
Input voltage Dry Bulb Air Temperature at Condenser
Minimum Maximum Minimum Maximum
-10%
+10% -30°F (-34°C)
115°F (46°C) Std
Ambient & Quiet-Line
-5% 208/230V
single-phase
125°F (52°C)
High Ambient Models
Table 2.14 Application limits
2.6.1 Low-Voltage Control Wire Connections
Field-supplied four-wire control connection (10-wire on 8-ton units) is required between the outdoor
condensing unit and the evaporator. Refer to Figure 2.5 on page 8 ,Figure 2.7 on page 10Figure 2.8 on
page 11 and electrical schematic (Figure 2.9 on page 12 throughFigure 2.10 on page 13).
2.6.2 Low-Voltage Control Wire Sizing
Low-voltage wiring should be sized to allow a 1 volt maximum drop due to line resistance between the
evaporator and condensing unit. Use NEC Class 1 or 2 wiring according to wire routing conditions chosen,
local codes and application limits in Table 2.14 above and Table 2.15 below.
Max. Distance*
ft. (m)
Min. Wire Gauge
AWG (mm
2
)
50 (15) 20 (0.75)
100 (30) 18 (1.0)
150 (45) 16 (1.5)
* One-way control wire run between outdoor condensing unit and evaporator.
Table 2.15 Recommended minimum wire size
Vertiv | Liebert PFH Installer/User Guide | 23