Chapter 2 Battery installation 7
LIEBERT APM UPS Module And Parallel System 30kVA~150kVA User Manual
The LIEBERT APM series UPS uses forced convection cooling by internal fans. Cooling air enters the module
through ventilation grills located at the front part of the cabinet and exhausted through grills located in the rear part of
the cabinet. Please do not block the ventilation holes.
If necessary, a system of extractor fans should be installed to aid cooling-air flow. An air filter should be used when
the UPS is to operate in a dirty environment and should be regularly cleaned to maintain airflow.
The cooling capacity of air conditioner should be selected according to the power loss data of UPS specified in Tab.
9-3: Normal mode (VFI SS 111 double-conversion UPS)
Note: The UPS should be installed on a cement surface or other surface that is not combustible.
1.3.2 External Battery Room
The battery will generate some amount of hydrogen and oxygen at the end of charging, so the fresh air volume of the
battery installation environment must meet EN50272-2001 requirements.
The ambient temperature of the battery must be stable. Ambient temperature is a major factor in determining the
battery capacity and life. The nominal operating temperature of battery is 20°C. Operating above this temperature will
reduce the battery life, and operation below this temperature will reduce the battery capacity. If the average operating
temperature of battery is increased from 20ºC to 30ºC, then the service life of the battery will be reduced by 50%. If
the operating temperature of the battery is above 40ºC, then the battery service life will be decreased in exponent
rate. In a normal installation, the battery temperature is maintained between 15°C and 25°C. Keep batteries away
from heat sources or air outlets.
If external batteries are to be used, the battery circuit breakers (or fuses) must be mounted as close as possible to
the batteries, and the connecting cables should be as short as possible.
1.3.3 Storing
Should the equipment not be installed immediately, it must be stored in a room so as to protect it Protection from
excessive humidity and heat sources (see Tab.
9-2).The battery needs to be stored in dry and cool place with good
ventilation. The most suitable storage temperature is 20 ºC to 25ºC.
Preventing battery deep discharge
Should the UPS remains unpowered for a prolonged period of time while the battery are connected, the batteryes may deeply
discharge and being so permanently damaged .In such cases it is therefore reccomented to leave the battery circuit breaker(s)
open. During storage in any case, periodically charge the battery according to the battery user manuals.
1.4 Positioning
When the equipment has been finally positioned, ensure the UPS will remain stationary and stable. To prolong the
service life, the choosen installation site must guarantee:
Space for easy operation on the UPS
Sufficient air to dispel the heat produced by the UPS
Protection from atmospheric agents
Protection from excessive humidity and heat sources
Protection against dust
Compliancy to the local fire prevention requirements
An operating environment temperature within +20°C to +25°C. The batteries are at maximum efficiency in this
temperature range (for information about the battery storage and transportation as well as the environment,
refer toTable 8-2 )
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