The UPS uses forced cooling by internal fans. Cooling air enters the UPS through the ventilation grills at the front of the
cabinet and exhausted through the ventilation grills at the back of the cabinet. Do not obstruct the ventilation holes
(ventilation grills). The rear of the UPS should be kept a distance at least 500mm from the wall to avoid blocking the UPS heat
dissipation, thus reducing the UPS internal temperature and improving the UPS life.
If necessary, install indoor extractor fans to aid cooling-air flow to avoid room temperature buildup. Air filters should be used
when the UPS is to operate in a dirty environment.
N O T E: W hen the battery cabinet is installed near the U PS, the maxim um allow able am bient
tem perature is dependent on the battery rather than the U P S.
N O T E: If the UP S is w orking in EC O m ode, the pow er consum ption w ill be less that in Norm al m ode.
Pro p er air conditioning system shall be selected according to the norm al operating m ode.
3.6.2 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.
3.6.3 Storage
It the UPS system is not installed immediately, then it must be stored with the original packaging in a room for protection
against excessive humidity and heat sources (see Table 12.2 on page183). 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.
W A RN IN G! During battery storag e, periodically ch arge th e battery according to the battery
m anufacturer instructions. In the charge p rocess, tem porarily con n ect the UPS to the m ains
and activate the b attery by recharging the battery.
3.7 Mechanical Requirement
3.7.1 Composition
As a cabinet of 600mm width, the system provides the options such as rectifier input switch, bypass input switch, and output
switch.
3.7.2 Moving Cabinet
1. The lifting equipment for moving the UPS cabinet must have enough lift capacity.
2. The center of gravity of the UPS cabinet is high; avoid falling over during the cabinet movement.
3 Mechanical Installation
30
Vertiv™ Liebert® EXM2 UPS User Manual
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