Emerson 208V Manuel D’Utilisation

This manual contains important safety instructions that must be followed during the installation and 

maintenance of the UPS and batteries. Read this manual thoroughly before attempting to install or 

operate this UPS.

This UPS contains no user-serviceable parts except the internal battery pack. The Off/Bypass 

push button does not electrically isolate internal parts. Under no circumstances attempt to gain 

internal access other than to replace the batteries due to risk of electric shock or burn. Do not 

continue to use the UPS if the front panel indications are not in accordance with these operating 

instructions or if the UPS performance alters in use. Refer all faults to your local dealer, Emerson 

Network Power representative or Emerson Network Power Channel Support.
This UPS has an internal battery, and the output receptacles of the UPS may carry live voltage even 

if the UPS is not connected to utility input power.
Before moving or rewiring this UPS, disconnect utility input power and the battery and make sure 

that the UPS is completely shut down. Otherwise, the output terminal may carry live voltage, 

presenting an electric shock hazard.
To ensure human safety and normal UPS operation, the UPS must be properly grounded before use.
When the UPS is connected to an IT power distribution system, a short-circuit protection device must 

be installed on the neutral line.
Install and use the Liebert

®

 GXT3

™

 in the following environments:

• Temperature: 32°F - 104°F (0°C - 40°C), relative humidity: 0% ~ 95% non-condensing
• Out of direct sunlight
• Away from heat sources
• Stable surface, not subject to vibrations or shocks
• Away from dust and other particulates
• Away from corrosive substances, salts and flammable gases

Keep the air inlet and outlet of this UPS unobstructed. Poor ventilation will increase the internal 

temperature of the UPS and can adversely affect the UPS and its batteries.
Keep liquid and foreign objects away from the UPS.
In case of fire, use a dry chemical fire extinguisher to put out the fire. Using a fluid fire extinguisher 

may cause electric shock.
This UPS is not intended for use with life support and other designated critical devices. Maximum 

load must not exceed that shown on the UPS rating label. This UPS is designed for data processing 

equipment. If uncertain, consult your local dealer or Emerson representative.
This UPS is not for use in a computer room as defined in the standard for the Protection of Electronic 

Computer/Data Processing Equipment, ANSI/NFPA 75.
The Liebert

®

 GXT3-3000RT120

™

 was tested under 30A branch circuit in accordance with the 

National Electrical Code, ANSI/NFPA 70. To reduce the risk of fire, connect only to a circuit provided 

with 30A maximum branch overcurrent protection.

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.
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.