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590-1557-501A/SL-23294_REV0_3-17

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LIEBERT® PST4™ 350 – 500 VA 

Quick Installation Guide

 

Before installing, operating, or 
maintaining your Liebert PST4 UPS 
Please review these important safety 
instructions. For detailed operating, 
maintenance, and troubleshooting 
information, refer to the User Manual 

included on CD with the UPS.

CAUTION: 

Connect the UPS only 

to a properly grounded/earthed outlet 

that is protected by an appropriate 

branch circuit protector (circuit breaker 

or fuse) that meets national and/or local 

electrical codes.

The Liebert PST4  should be located 

near the wall outlet. Do not use 

extension cords between the wall 

outlet and the UPS. The UPS  is 

designed for small office and home 

use only. It is not recommended to be 

used with life-support equipment or 

applications.

WARNING: 

Risk of Electric Shock. 

Observe all cautions and warnings in 

this manual. Failure to do so may result 

in serious injury or death. Refer all UPS 

and battery service to properly trained 

and qualified service personnel. Do 

not attempt to service this product 

yourself beyond the battery replace-

ment procedures. Opening or removing 

the cover may expose you to lethal 

voltages within this unit even when it 

is apparently not operating and the 

input wiring is disconnected from the 
electrical source. Never work alone. 

In case of fire, use a dry chemical fire 
extinguisher to put out the fire. Using 
a fluid fire extinguisher may cause 

electric shock. In the event of an 
emergency, press and hold the ON/OFF 
button for at least one (1) second to 

turn off the UPS then unplug the UPS 

from the wall outlet.

NOTICE: This equipment has been 
tested and found to comply with 
the limits for a Class B computing 
device in accordance with the 

specifications in Subpart J of Part 

15 of FCC Rules and also meets the 
Class B limits for radio noise emissions 
from digital apparatus set out in the 
Radio Interference of the Canadian 
Department of Communications. 
These limits are designed to provide 
reasonable protection against such 
interference in a residential installation. 
This equipment generates and uses 
radio frequency and if not installed 
and used properly, that is, in strict 
accordance with the manufacturer’s 
instructions, this equipment may cause 
interference to radio and television 
reception. If this equipment does cause 
interference to radio or television 
reception, which can be determined by 

turning the equipment off and on, the 

user is encouraged to try to correct 
the interference by one or more of the 
following measures:

•  Re-orient the receiving antenna.

•  Relocate the computer with respect 

to the receiver.

•  Move the computer away from the 

receiver.

•  Shielded communication-interface 

cables must be used with this 
product.

WARNING: 

Changes or modifica

-

tions to this unit not expressly ap-
proved by the party responsible for 
compliance could void the user’s 
authority to operate the equipment.

The Liebert PST4 is shipped with the 
following items:

•  CD with  MultiLink® Shutdown 

Software and User manual 
(electronic version)

•  USB cable; one 2 m (6-1/2 ft.) long

•  Wall-mount template and screws

•  Quick Installation Guide with 

warnings safety instructions 
and WEEE recycling sheet 
(ISO 14001 compliance)

INSTALLATION

Install the Liebert PST4  in a 
temperature-controlled environment 
that is free of corrosive and conductive 
contaminants. Avoid locations near 
heat or water sources and exposed to 
direct sunlight. For proper ventilation, 
leave approximately 2 to 4 inches 
clearance on all sides of the UPS.

•  The UPS unit ships with the internal 

battery connected.

•  The UPS may be mounted to a wall 

using the mounting slots on the 
bottom of the UPS and provided 
screws. A template for screw location 
is provided and the unit should be 
mounted ensuring they are in a wall 
stud for a secure installation.

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