12 Chapter 2 Mechanical Installation
Liebert NXC 30kVA And 40kVA UPS User Manual
2.5.2 Battery Location Selection
Batteries generate some amount of hydrogen and oxygen at the end of charge, so the fresh air volume of the battery
installation environment must meet the EN50272-2001 requirements.
The ambient temperature is the main factor that affects the battery capacity and life. The normal operating
temperature of the battery is 20°C. If the ambient temperature is higher than 20°C, the battery life will be reduced. If it
is lower than 20°C, the battery capacity will be reduced. In normal situation, the allowable ambient temperature for the
battery is 15°C to 25°C. The ambient temperature of the battery shall be maintained constant, and the battery shall be
kept away from heat source and air outlet.
Battery can be installed inside the specialized battery cabinet which shall be close to the UPS. If the battery is placed
on the raised floor, bracket shall be installed under the floor, just as for the UPS. If the battery adopts rack mounting or
is mounted far from the UPS with other installation mode, the battery circuit breaker shall be installed near the battery,
and the cabling distance shall be minimized.
2.5.3 Storage
Should the UPS not be installed immediately, it must be stored with the original packaging in a room for protection
against excessive humidity and heat sources (see Table 11-2). The battery needs to be stored in a dry and cool place
with good ventilation. The most suitable storage temperature ranges from 20°C to 25°C.
Warning
During battery storage, periodically charge the battery according to the battery manufacturer instructions. In the charge process,
temporarily connect the UPS to the mains and activate the battery by recharging the battery.
2.6 Mechanical Requirement
2.6.1 Moving Cabinet
Warning
1. The lifting equipment for moving the UPS cabinet shall have enough lift capacity.
2. The UPS has installed castors. When removing the UPS from the shipping pallet, pay attention to keeping the UPS from sliding.
Ensure that adequate personnel and lifting equipment are available when removing the shipping pallet.
3. Due to its intensity, the castors may be valid only on the flat surface.
4. The gravity center of the UPS cabinet is high, avoid falling over during the cabinet movement.
5. Vertical hanging of cabinet is not allowed.
Caution
Take special care when moving the battery cabinet fitted with batteries, in which case, you must fasten each battery string, and try
to minimize the movement distance.
Ensure that the UPS weight does not exceed the capacity of the lifting equipment. For the UPS weight, refer to
Table 11-3.
The UPS cabinet can be moved by forklift or other similar lifting equipment.
For short distance movement, the castors can be used.
2.6.2 Clearance
Because the UPS has no grill at the two sides, there is no special clearance requirement on the two sides.
Besides the local regulations, to enable routine tightening of the power terminals within the UPS, it is recommended
that clearance around the front of the UPS should be sufficient to enable free passage of personnel with the door fully
open. Meanwhile, maintain at the back of the cabinet a clearance at least 500mm to permit adequate circulation of air
coming out of the UPS.
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