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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert
®
NX
™
UPS and ancillary equipment.
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 heavy unit tipping over. Can cause property damage, injury and death.
Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight ranges from 1180 to 2205 lb. (535 to 1000kg).
Determine unit weight and locate center of gravity symbols
before handling the UPS. Test lift and balance the cabinet
before transporting. Never tilt equipment more than 15 degrees from vertical.
Battery manufacturers supply details of the necessary precautions to be observed when
working on, or in the vicinity of, a large bank of battery cells. These precautions should be
followed implicitly at all times.
Follow all battery safety precautions when installing, charging or servicing batteries. In
addition to the hazard of electric shock, gas produced by batteries can be explosive and
sulfuric acid can cause severe burns. When connected, the nominal battery voltage is 480VDC
and is potentially lethal.
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 maintenance. Be constantly aware that the
UPS system contains high DC as well as AC voltages.
Check for voltage with both AC and DC voltmeters prior to making contact.
!
WARNING
Risk of electric shock. Can cause injury and death.
Dangerous voltages are present within the UPS and battery enclosure. The risk of contact
with these voltages is minimized as the live component parts are housed behind a hinged,
lockable door. Further internal safety screens make the equipment protected to IP20
standards.
No risk exists to any personnel when operating the equipment in the normal manner,
following the recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be
carried out only by trained personnel.
!
WARNING
Risk of electric shock from high leakage current. Can cause injury, property damage and
death.
High ground leakage current: Ground connection is essential before connecting the input
supply.
This equipment must be grounded in accordance with local electrical codes.
Maximum load must not exceed that shown on the UPS rating label.