0MNMPMK10NPENUB 00 Pag. 11 / 57
2.3 Cooling of the premises
The recommended operating temperature for the lifetime of the UPS and of the batteries is between 20 and 25°C.
The lifespan of the battery depends on the operating temperature; with an operating temperature of between 20°C
and 30°C, the lifespan of the batteries is halved.
A heat dissipation system is required to keep the temperature of the premises housing the equipment within the field
20÷25°C.
The heat dissipation needed for the correct operation of the UPS is brought about by the air current made by the fans
located inside the UPS (forced convection) and by the air around the side panels (natural convection).
In order to ensure proper air circulation, and therefore the correct operation of the UPS, measures must be taken
during installation to avoid any obstructions to the free circulation of air. These include the following:
leave a free space of at least one metre at the front of the equipment to ensure both the circulation of the air and
installation and maintenance operations;
With natural convection the thermal load is dissipated to the outside through the walls; thus a cabinet placed
against a wall or in a hollow dissipates less heat than one located in a free environment.
The following rule must be observed:
leave at least one of the three side walls free: right, left or back.
the side strips must not be mounted for installations where cabinets are placed side by side.
10÷80kVA
Leave a free space of at least 20 cm. must be left between the
back of the UPS and the wall so as not to block the flow of air
from the fans, and at least 40 cm. for maintenance operations on
the fans.
100kVA
ensure a distance of at least 60 centimetres from the ceiling, so as
not to hinder air extraction,
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