I
NSTALLATION
E
NVIRONMENT
When choosing the place of installation of the UPS and the Battery Box, observe the following:
avoid dusty environments
check that the floor is level and able to support the weight of the UPS and the Battery Box
avoid environments which are too restricted as these could hinder normal maintenance operations
the relative humidity in the environment must not exceed 90%, without condensation
check that the ambient temperature, while the UPS is running, remains between 0 and 40°C
The UPS is able to operate at an ambient temperature of between 0 and 40°C. The recommended
operating temperature for the UPS and the batteries is between 20 and 25°C. The battery
manufacturers point out that, if the operating life of the batteries is 5 years on average with an
operating temperature of 20°C, moving the operating temperature up to 30°C halves their lifespan.
avoid positioning in places which are exposed to direct sunlight or hot air
In order to ensure the temperature in the place of installation remains within the aforementioned range, it is necessary to
arrange a heat dispersion system (the value of the kW / kcal/h / BTU/h* dissipated by the UPS is
shown in the “Technical
data” section”). The methods used are the following:
natural ventilation**
forced ventilation
, recommended if the external temperature is lower (e.g. 20°C) than the temperature at which
the UPS or Battery Box is to operate (e.g. 25°C)
air conditioning system
, recommended if the external temperature is higher (e.g. 30°C) than the temperature set
for operation of the UPS or Battery Box (e.g. 25°C)
*
3.97 BTU./h = 1 kcal/h
**
To calculate the air flow rate, it is possible to use the following formula: Q [m³/h] = 3.1 x Pdiss [kcal/h] / (at - et) [°C]
Pdiss is the dissipated power expressed kcal/h in the place of installation by all the installed equipment.
at= ambient temperature, et=external temperature. In order to take leaks into consideration, it is necessary to increase the
resulting value by 10%.
The table shows a sample flow rate where (at - et) =5°C and the rated resistive load (pf=0.9).
(N.B. The formula applies if at>et; otherwise installation requires an air conditioner).
P
OSITIONING THE
UPS
When positioning the UPS, it is necessary to bear the following in mind:
there must be enough free space in front of the equipment to allow it to be switched on/off and any maintenance
operations to be carried out (
1.65 m )
the back of the UPS must be positioned at least 50 cm away from the wall in order to ensure a correct flow of
the air coming out of the ventilation fans and to allow access to the “BC/BYP COMPARTMENT”
the top must be at least 50 cm away from the ceiling in order to allow maintenance operations
no objects must be rested on the top
refer to the APPENDIX section for UPS dimensions
