Vertiv™ | Liebert
®
STS2
™
100-1000A, 50/60Hz User Manual | Rev. 12 | 11/2017 1
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during the installation and maintenance of
the Liebert STS2.
WARNING
The unit is supplied by more than one power source. The unit contains hazardous voltages if any of the
input sources are ON, even when the unit is in bypass. To isolate the unit, turn OFF and lock out ALL input
power sources.
Verify that all input power sources are de-energized and locked out before making connections inside
unit.
Lethal voltages exist inside the unit during normal operation. Only qualified service personnel should
perform maintenance on the static switch.
NOTE
Read the entire manual before installing or operating the system. Adhere to all operating instructions and
warnings on the unit and in this manual.
Vertiv neither recommends nor knowingly sells this product for use with life support or other FDA-designated
“critical” devices.
The Liebert STS2 is suitable for indoor use only. Protect the unit from excessive moisture and install the unit in
an area free from flammable liquids, gases, or corrosive substances.
The unit is designed to operate from solidly grounded AC power sources only. Provide input over-current
protection in accordance with the unit ratings. Wire and ground the unit according to national and local electrical
safety codes. All wiring should be installed by a qualified electrician.
Before unit is placed into service for the first time, after equipment relocation, or after the unit has been
de-energized for an extended period of time, a thorough equipment inspection and supervised startup by
qualified service personnel are strongly recommended.
CAUTION
This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J of the FCC
rules. These limits provide reasonable protection against harmful interference in a commercial
environment. This unit generates, uses and radiates radio frequency energy and, if not installed and used
in accordance with this instruction manual, may cause harmful interference to radio communications.
Operation of this unit in a residential area may cause harmful interference that the user must correct at
his own expense.
WARNING
Locate the center of gravity symbols and determine the unit’s weight before handling the cabinet.
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