IV306E Rev. 004 Siel S.p.A.
Page 5 of 37 + 12 Tables, 14 F FR
Issued date: 2014-03-24
All maintenance or repair work which requires access to those areas can only be carried out by
authorised SIEL S.p.A. personnel.
Introduction of objects
Do not insert any objects into the air vents, avoid contact with fluids and clean away with a dry cloth.
These precautions must be observed even when the machine is switched off.
Equipment Top
The UPS top panels are not designed to withstand heavy weights.
Never
climb on the top of the UPS
or place service platforms or other similar objects on it and
do not
use them as a support for further
frameworks (cable grommets, brackets, etc...)
Batteries
These power supplies are connected to batteries which store electrical energy, often of a high capacity.
They should therefore be operated with utmost care due to the high voltage which is present even
when the loads are apparently not powered. It is important to remember that the residual voltage
contained in seemingly flat batteries may still be potentially lethal. When working on batteries, be
especially careful not to generate accidental electrical arcs.
Electrolyte
If the electrolyte leaks from the batteries, it is necessary to store them in sulphuric acid-resistant
containers and dispose of them according to applicable laws.
If the electrolyte comes into contact with skin, rinse with plenty of water.
If it comes into contact with eyes, rinse immediately with plenty of water and contact a doctor as soon
as possible.
Indirect contact
The input neutral is essential for the correct operation of the UPS.
If this connection is missing, the UPS will continue to power the load, but the neutral will be isolated,
so that automatic differential circuit breakers downstream of the UPS, which should protect against
indirect contact, will be disabled.
Cable cross-section
Check that the input and output cables have the correct cross-section. Also check plant cables.
Earth connections
Always connect the earth cable first. When disconnecting the equipment, remove the earth cable last.
Power feedback
If the backup mains cables for the equipment or the power supply board are not provided with a device
against feedbacks from the UPS to the mains, place clearly visible warnings - near all the power
switches installed on the plant to which the UPS is connected - with the following notice:
AN UNINTERRUPTIBLE POWER SUPPLY IS CONNECTED ON THIS LINE. BEFORE
PERFORMING ANY OPERATION ON THIS CIRCUIT TURN OFF ALL THE INPUT/OUTPUT
SWITCHES.
