Liebert XDH manual Connecting High Voltage Wiring, Electrical

Electrical

6.0ELECTRICAL

The unit must be installed in accordance with national wiring regulations. Refer to the unit’s serial tag for electrical requirements. Refer to Table 3 for details.

WARNING

! Risk of electric shock. Can cause death or injury.

Disconnect both electric power cords before working within the unit.

6.1 Connecting High Voltage Wiring

The Liebert XDH requires single-phase power for normal operation. The unit ships with two power cords, each 10 feet (3m) long with NEMA 5-15 plugs, which connect to common, three-prong outlets (see Figure 24).

The XDH will function properly with only one power cord. The second power cord permits connection to a separate power source to increase reliability—If one power source fails, the cord connected to the remaining, live power source will power both banks of fans.

To attach the power cords, clip the plastic hangers attaching the cords to the Liebert XDH. Press the appropriate end of each cord onto the electrical inlet. Attach the strain-relievers onto the power cords and press the assemblies into the cable exit slots.

Figure 24 Liebert XDH electrical connections

60Hz MODELS ONLY Field wiring connections at terminal strip to be NEC Class 2. Use switch contacts with 75VA minimum rating.

50Hz MODELS ONLY Field wiring connections

at terminal strip for safety extra low voltage circuits only. Use switch contacts rated 75VA minimum, 24VAC maximum.

Condensate Detection

Dry Contacts-Low Voltage

Connections

(Upper Circuit 84, 85)

Condensate Detection

Dry Contacts-Low Voltage

Connections

(Lower Circuit 82, 83)

IEC Primary Power Inlet

IEC Secondary Power Inlet

Rear of Liebert XDH	Power Cord Strain Relievers
Panel Removed for Clarity

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