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Important Safety Instructions
1Liebert
®
NX
™
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert NX UPS. Read this manual thoroughly, paying special attention to the sections that apply to
your installation, before working with the UPS. Retain this manual for use by installing
personnel.
!
WARNING
Risk of electric shock. Can cause equipment damage, injury or death.
This UPS has several circuits that are energized with high DC as well as AC voltages. Check
for voltage with both AC and DC voltmeters before working within the UPS. Check for voltage
with both AC and DC voltmeters before making contact.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should be involved in installing the UPS or preparing the UPS for
installation. When performing maintenance with any part of the equipment under power,
service personnel and test equipment should be standing on rubber mats.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.
Extreme caution is required when performing installation and maintenance.
Special safety precautions are required for procedures involving handling, operation and
maintenance of the UPS system. Observe all safety precautions in the installation manual,
SL-25535, and in this manual before as well as during performance of all maintenance
procedures. Observe all DC safety precautions before working on or near the DC system.
!
WARNING
Risk of heavy unit falling over. Improper handling can cause equipment damage, injury or
death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight is up to 4450lb. (2019kg).
Locate center of gravity symbols and determine unit weight before handling each
cabinet. Test lift and balance the cabinets before transporting. Maintain minimum tilt from
vertical at all times.
Slots at the base of the module cabinets are intended for forklift use. Base slots will support
the unit only if the forks are completely beneath the unit.
Read all of the following instructions before attempting to move, lift, or remove packaging
from unit, or prepare unit for installation.
!
WARNING
Risk of electric shock and fire. Can cause equipment damage, personal injury or death.
Under typical operation and with all UPS doors closed, only normal safety precautions are
necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.
Only test equipment designed for troubleshooting should be used. This is particularly true for
oscilloscopes. Always check with an AC and DC voltmeter to ensure safety before making
contact or using tools. Even when the power is turned Off, dangerously high potential electric
charges may exist at the capacitor banks and at the DC connections.
All wiring must be installed by a properly trained and qualified electrician. All power and
control wiring must comply with all applicable national, state and local codes.
One person should never work alone, even if all power is disconnected from the equipment. A
second person should be standing by to assist and to summon help in case of an accident.