Ups Battery - Emerson Liebert APM 90 User Manual

46 Chapter 6 Battery
be inspected and tightened at least once a year. Failure to observe this may cause fire!
b) Inspect the battery appearance before accepting and using the battery. If there exist any package damage, dirty
battery terminal, terminal erosion, rust, or enclosure crack, deformation or electrolyte leakage, replace it with new
product. Otherwise, battery capacity reduction, electrolyte leakage or fire may be caused.
c) The battery is very heavy. Please use proper method to move and hoist the battery to prevent to human being or the
battery terminals. Severe damage to the battery may cause fire.
d) The battery terminals shall not be subject to any force, such as the pulling force or twisting force of the cable.
Otherwise, the internal connection of the battery may be damaged, and severe damage may cause fire.
e) The battery shall 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 shall at least meet the requirement of EN50272-2001.
Otherwise, battery bulging, fire or even personal may be caused.
f) The battery shall be kept away from heat sources like transformers, or fire sources. Do not burn the battery or the
battery in fire, otherwise, electrolyte leakage, battery bulge, fire or explosion may be caused.
g) Do not directly connect any conductor between the positive and negative terminals of the battery. Remove finger
rings, watches, necklaces, bracelets and other metal objects before operating the battery, and ensure that the tools
(for example, wrench) are wrapped with insulating material. Otherwise, battery burning, explosion, human death or
injury may be caused.
h) Do not disassemble, modify or damage the battery. Otherwise, battery short circuit, electrolyte leakage or even
personal may be caused.
i) Clean the battery enclosure with wringed wet cloth. To avoid any static or arcing, do not use dry cloth or duster to
clean the battery. Do not use the organic solvent, such as thinner, gasoline, volatile oil, to clean the battery. Otherwise,
the battery enclosure may be cracked. In the worst case, fire may be caused.
j) The battery contains diluted sulfuric acid. In normal use, the diluted sulfuric acid is absorbed to the baffle plate and
polar plate of the battery. However, if the battery is damaged, the acid may leak from the battery. Therefore, use
personal protective equipment, such as, goggles, rubber gloves and apron, when operating the battery. Otherwise, if
the diluted sulfuric acid enters the eyes, blindness may be caused; if it contacts the skin, the skin may be burnt.
k) The battery may have short circuit, electrolyte dry-up or positive-pole plate erosion at the end of its life. If it is still
used in this state, the battery thermorunaway, bulging or electrolyte leakage may occur. Please replace the battery
before it enters this state.
l) Before connecting or disconnecting the battery connection cables, please cut off the charging power.
m) Check if the battery has been unexpectedly earthed. If yes, remove the earth power. Contact with any part of the
earthed battery may cause electric shock.

6.3 UPS Battery

The UPS battery generally adopts valve-regulated battery. At present, 'valve-regulated' means the 'sealed type'
or 'maintenance free' mentioned in the past.
The valve-regulated battery is not completely sealed. Especially when it is over-charged, there will be gas
escape. The volume of the gas escape is less than the water injection battery. However, during the installation
design of the battery, temperature rise shall be taken into account, and enough room shall be reserved to
ensure good ventilation.
Besides, the valve-regulated battery is not maintenance free. The valve-regulated battery must be kept clean,
and it shall be inspected regularly to check if the connection is reliable, and if it is corroded. For details, please
refer to 6.11 Battery Maintenance.
It is suggested to connect no more than 4 strings of batteries in parallel. Batteries of different types, names or
newness shall not be used together. Otherwise, the battery inconsistency will cause frequent over-discharge
or under-charge of certain battery. At last, the battery will have premature failure, and the entire string of
battery will have insufficient backup time.
Warning: hazardous battery voltage present behind covers
Liebert APM 90 Integrated Modular UPS User Manual