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Chapter 2 Mechanical Installation
2.3 Environmental Requirement
2.3.1 UPS Location Selection
The UPS should be located in a cool, dry, clean-air environment with adequate ventilation. It is suitable for
mounting on concrete or other non-combustible surface only. The ambient environment should be free of
conductive powder (such as metallic powder, sulfide, sulfur dioxide, graphite, carbon fiber, conductive fiber,
and so on), acid mist or other conductive media (strongly ionized substances). The environment specifications
should comply with relevant international standard & specifications and the operating range (see Table 11-2)
specified in this manual.
The UPS is air-cooled with the aid of internal fans. Cold air enters the UPS through the ventilation grilles in the
front of the cabinet and hot air is released through the grilles on the back. Do not cover the ventilation
openings.
If necessary, install a system of room extractor fans to avoid room temperature build-up. Optional air filters
are available if the UPS is to operate in a dusty environment.
2.3.2 Battery Location Selection
The batteries will generate small amount of hydrogen and oxygen at the end of battery charge. Therefore,
make sure that the new air ventilation amount in the battery room meets the EN50272-2001 requirement.
Batteries should be mounted in an environment where the temperature is consistent and even over the whole
battery. Temperature is a major factor in determining the battery life and capacity. Typical battery
manufacturer performance data are quoted for an operating temperature of 20°C. Operating above 20°C will
reduce the battery life while operation below 20°C will reduce the battery capacity. Provided that the average
battery operating temperature increases from 20°C to 30°C, the battery life will be reduced by 50%; provided
that the average battery operating temperature is above 40°C, the battery life will be reduced by an
exponential multiple. In a normal installation the battery temperature is maintained between 15°C and 25°C.
Keep batteries away from main heat sources and main air inlets.
The UPS uses external batteries, a battery protection device (for example, fuses or circuit breakers) must be
mounted as close as possible to the batteries themselves, and connected using the most direct route possible.
2.3.3 Storage
Should the UPS not be installed immediately, it must be stored in a room for protection against excessive
humidity and heat sources. The batteries should be stored in a dry, cool environment with adequate
ventilation, at temperature ranging from 20°C to 25°C at best.
Warning
During storage, periodically charge the battery according to the battery manufacturer instructions. In the charge
process, temporarily connect the UPS to the mains for the time required for recharging the battery to activate the
battery.
Liebert APM 150 Integrated UPS Single Module And Parallel System
User Manual
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