Liebert NX 10kVA, Installation Manual

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Installation
6
1.5.1 System Composition
A UPS system can comprise a number of equipment cabinets, depending on the individual system
design requirements—e.g., UPS cabinet and External Bypass cabinet. In general, all cabinets used
will be the same height and are designed to be positioned side-by-side to form an aesthetically appeal-
ing equipment suite.
Refer to
7.0 - Installation Drawings for the positioning of the cabinets described below.
1.5.2 10-30kVA UPS
The 10-30kVA NX consists of a single cabinet housing the UPS and its internal battery string.
An extended battery option kit is available. This comprises a separate cabinet containing additional
batteries that can be connected to the UPS to increase its total battery capacity (see 3.6 - External
Battery Cabinet Installation ).
Maintenance Bypass-Transformer Cabinet options are available to:
• Provide an external wraparound maintenance bypass switch
• Change input voltage
• Change output voltage
• Provide three-wire input and four-wire output
• Provide load neutral isolation
For details on installing a Maintenance Bypass Cabinet or Transformer Cabinet, see 7.0 - Installa-
tion Drawings .
1.5.3 Positioning the UPS
Choose a location for the UPS that offers:
• Easy connection to inputs, outputs and auxiliary equipment
• Enough space to service the UPS
• Air circulation sufficient to expel heat produced by UPS
• Protection against moisture and excessive humidity
• Protection against dust and other particulate matter
• Compliance with fire prevention regulations and practices
• Operating environment temperature of 68°F to 86°F (20°C to 30°C) for maximum battery effi-
ciency
Considerations in Moving the NX
Ensure that the UPS weight is within the designated surface weight loading (lb./ft
2
or kg/cm
2
) of any
handling equipment. See Table 9 for weights of various units.
To move the UPS and optional battery cabinets:
• The NX may be rolled on its casters when moving the unit a short distance. For longer distances,
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 NX has sufficient lifting capacity.
The NX weight ranges from 850 to 1400 lb. (386 to 635kg). See Table 9 for details. The UPS
presents a tipping hazard. Do not tilt the NX further than 15 degrees from vertical.
The UPS is fitted with casters—take care to prevent movement when unbolting the
equipment from its shipping pallet. Ensure adequate personnel and lifting equipment are
available when taking the NX off its shipping pallet. Do not tilt the unit more than 15 degrees
from center.