IV404E Rev.000 SIEL S.p.A.
Issue date: 2017-06-05 Pag. 14 di 90 + FR
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:
ensure a distance of at least 60 centimetres from the ceiling, so as not to hinder air extraction,
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.
