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Installation
Battery Location
Batteries must be installed in Liebert NX 480V battery cabinets or battery room. Temperature is a major factor in determining battery life and capacity. Battery manufacturers recommend an operat- ing temperature of 77°F (25°C). Ambient temperatures higher than this reduce battery life; tempera- tures lower than this reduce battery capacity. In a typical installation, battery temperature should be maintained between 74°F and 80°F
1.4.3Special Considerations for Parallel Systems
1.Consider the grounding configuration of your system before finalizing module placement. For optimal ground performance, the Liebert NX modules should be close together.
2.For optimal
3.Position modules in such a way as to minimize the length of power cables and control wiring between UPS modules and the paralleling cabinet.
1.5Considerations in Moving the Liebert NX
Ensure that the UPS weight is within the designated surface weight loading (lb./ft2 or kg/cm2) of any handling equipment. See Table 7 for weights of various units.
To move the UPS and optional battery cabinets:
•The Liebert NX may be rolled on its casters when moving the unit a short distance. For longer dis- tances, move the UPS with a forklift or similar equipment to ease the relocation and to reduce vibration.
The optional battery cabinets should be moved with a forklift or similar equipment.
! WARNING
Ensure that any equipment that will be used to move the Liebert NX has sufficient lifting capacity. The Liebert NX weight ranges from 1180 to 1290 lb. (535 to 585kg). See Table 7 for details. The UPS presents a tipping hazard. Do not tilt the Liebert NX further than 15 degrees from vertical.
The UPS is fitted with
! WARNING
The casters are strong enough for movement across even surfaces only. Casters may fail if they are subjected to shock loading, such as being dropped or rolled over holes in the floor or obstructions. Such failure may cause the unit to tip over, injuring personnel and damaging the equipment.
Care must be taken when maneuvering cabinets fitted with batteries. Keep such moves to a minimum. For further information, see Battery Cabinet Precautions on page 2.
Final Position
When the equipment has been finally positioned, ensure that the adjustable stops are set so that the UPS will remain stationary and stable (see 6.0 - Installation Drawings).
1.6Mechanical Considerations
The Liebert NX is constructed with a steel frame and removable panels. Top and side panels are secured to the chassis by screws. The doors may be opened for access to power connections bars, aux- iliary terminal blocks and power switches.
The UPS comes with an operator control panel, which provides basic operational status and alarm information. Cooling is provided by internal fans. The unit sits on four casters. Adjustable stops are provided to prevent the UPS from moving once it has been moved to its final position.
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