User Manual 10H52192UM60 - Rev. 1 - 09/2011 23
Battery Liebert NX
Warning: Hazardous battery voltage present behind covers
5) The battery must be installed and stored in a clean, cool, and dry environment. Do not install the battery in a sealed battery chamber
or a sealed room. The battery room ventilation must comply with EN50272-2001 as a minimum requirement. Failure to follow this
instruction may result in battery bulging, fire, or even injuries.
6) The battery must be kept away from heat sources such as transformers or fire sources. Do not burn the battery or the set battery on
fire, as this may result in electrolyte leakage, battery bulge, fire, or explosion.
7) Do not connect any conductor directly between the positive and negative terminals of the batteries. Remove rings, watches,
necklaces, bracelets, and other metal objects before working on the batteries and ensure that the tools (for example, wrenches) are
wrapped with insulating material. Failure to do so may result in battery burning, explosion, human death or injury.
8) Do not dismantle, modify, or damage the battery. This may result in a battery short circuit, electrolyte leakage, or even injury.
9) Clean the battery enclosure with a damp cloth. To avoid any static or arcing, do not use dry cloths or dusters to clean the battery. Do
not use organic solvent, such as thinner, gasoline, or
volatile oil
, as this may crack the battery enclosure. In the worst case scenario, this
may result in a fire.
10) The battery contains diluted sulfuric acid. In normal use, the diluted sulfuric acid is absorbed by battery the baffle and pole plates.
However, if the battery is damaged, the acid may leak from the battery. Therefore, use personal protective equipment such as goggles,
rubber gloves, and an apron when operating the battery. The diluted sulfuric acid may cause blindness if it enters the eyes and burns if
it comes into contact with the skin.
11) The battery be affected by shorting, electrolyte dry-up, or positive-pole plate erosion at the end of its life. If it is still used in this
state, thermal runaway, bulging, or electrolyte leakage may occur. Please replace the battery before it reaches this state.
12) Before connecting or disconnecting the battery connection cables, please cut off the charging power.
13) Check if the battery has been unexpectedly earthed. If this is the case, remove the earth connection. Contact with any part of the
earthed battery may result in an electric shock.
2.3 Battery Power Cable (External Batteries Only)
2.3.1 Overview
Please install and connect the batteries according to the following description and graphic representation.
2.3.2 Installing the Batteries
1. Before installation, check the batteries for signs of damage, inspect and count the accessories, and carefully read this manual and
the user manual or installation instructions provided by the battery manufacturer.
2. There must be a clearance of 10 mm between the vertical sides of the batteries to allow for the smooth flow of air around the
batteries.
3. A certain amount of clearance must be maintained between the battery top and the underside of the layer above it to facilitate
battery monitoring and maintenance.
4. The batteries must be installed from the bottom layer upwards to avoid creating a high center of gravity. The battery must be
installed properly and protected from vibrations or shock.
5. In the case of a parallel UPS system that uses a common battery bank, an additional isolating device (switch) must be installed in
the dedicated common battery connection to each individual UPS, so that system maintenance can be carried out correctly. In any
event, we advise against using common battery solutions as they reduce the reliability of the system.
6. Measure the battery voltage and calibrate the battery voltage after starting up the UPS.
2.3.3 Connecting the Batteries
1. Check that the battery fuses are not inserted. These must be fitted during commissioning, NOT during installation.
2. If the battery cabinet is installed on a raised floor, the battery power cables and other cables can enter the UPS cabinet through
the base of the cabinet. If the UPS and battery cabinet are installed side by side on a solid floor, these cables can be fed into the UPS
cabinet via the cable entry holes in the lower part of the battery cabinet. The cables for connecting the UPS to the battery cabinets
are not included in the delivery. They can be provided by the manufacturer upon request. For the best interference suppression (to
reach class C2 EM) we recommend using shielded battery cables between the UPS cabinet and the battery cabinet. The shielding
must be connected to both the UPS and the battery cabinets.
3. Make the ground connections (PE).
4. When multiple battery strings are used, they must be connected in series and then in parallel. Before applying load and
commencing power-up, be sure to measure the total voltage of the battery strings and make sure that it is correct. The negative
and positive terminals of the battery must be connected to the corresponding negative and positive battery terminals of the UPS, in
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