Liebert NX 10kVA, Installation Manual

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Installation
5
1.2.1 Storing for Delayed Installation
If the equipment will not be installed immediately, it must be stored indoors where the humidity is no
higher than 90% and the temperature is no higher than 104°F (40°C). The storage area must protect
the NX from excessive moisture (see 5.1 - Dual Bus Synchronizer ).
1.3 Preliminary Checks
1.3.1 Identification
The equipment supplied has an identification tag on the back of the main door listing the type and
size of the UPS.
1.4 UPS Location
1.4.1 Environmental Considerations
Before installing the NX, verify that the UPS room satisfies the environmental conditions stipulated
in 5.1 - Dual Bus Synchronizer , paying particular attention to the ambient temperature and air
exchange system.
The UPS unit should be installed in a cool, dry, clean-air environment with adequate ventilation to
keep the ambient temperature within the specified operating range 32°F to 104°F (0°C to 40°C).
All NX models are cooled by internal fans. Cooling air enters the devices through ventilation grids at
various points on the cabinet and is released through grids on the top of the unit. To permit proper
airflow and prevent overheating or malfunctioning, do NOT cover the ventilation openings or allow
fans or equipment to blow air down onto the NX.
If necessary, a system of extractor fans should be installed to aid cooling-air flow If the unit is to be
operated in an environment that is not clean-air, a suitable air filtration system should be used to
ensure the unit works properly.
See
Table 9 for details on heat dissipation.
Battery Location
Temperature is a major factor in determining battery life and capacity. Battery manufacturers recom-
mend an operating temperature of 77°F (25°C). Ambient temperatures warmer than this reduce bat-
tery life; temperatures below this reduces battery capacity. In a typical installation, battery
temperature should be maintained between 68°F and 86°F (20-30°C). Batteries should be placed
where there are no main heat sources or air inlets to prevent portions of batteries from being either
much warmer or much cooler than other parts of the batteries.
1.5 Mechanical Considerations
The 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, auxiliary termi-
nals blocks and power switches.
The UPS comes with an operator control panel, which provides basic operational status and alarm
information. The cabinet houses both the power components and the internal batteries. Cooling is
provided by internal fans. The unit sits on four casters. Adjustable leveling feet are provided to pre-
vent the UPS from moving once it has been moved to its final position.
!
CAUTION
If the UPS must remain disconnected from power for more than six (6) months, the battery
must be recharged before use. To charge the batteries, the unit must be connected to utility
power and started up—the charger operates only while the NX is operating.
!
CAUTION
When batteries are installed in the UPS or are cabinet-mounted adjacent to the UPS unit, the
battery—not the UPS—dictates the designed maximum ambient temperature.
!
CAUTION
When batteries are installed in the UPS or are cabinet-mounted adjacent to the UPS unit, the
battery—not the UPS—dictates the designed maximum ambient temperature.