Liebert GXT3 RT120, GXT3 1000MT120, GXT3 3000RT208 Quick Start Manual

Liebert® GXT3™

Plastic Bezel

Status Indicators

and Controls

Tower

Support

Base

Liebert GXT3 UPS

With

External Battery Cabinet

Liebert GXT3 UPS

Quick Start Guide – 500-3000VA RT120 & 3000RT208 & 1000MT120 Models

The Liebert GXT3 is shipped with the following items:

• Terminal Block Communication terminals

• Compact disc with:

o Liebert MultiLink®
o Configuration program
o User manual (electronic version)

• USB cable, one; 2m (6-1/2 ft.) long

• Rack handles with mounting hardware

• Plastic tower support base, one set

• Plastic Bezel

• Warnings, safety instructions booklet and WEEE recycling sheet (ISO 14001 compliance)

If the installation is in the Tower orientation, locate the support base and stand the UPS up on the support base. Note the
display should be located on the upper half of the unit in the Tower orientation and to rotate the display, grasp the sides
and rotate it 90 degrees clockwise. If the UPS is to be installed in a rack enclosure, follow the instructions provided with

the rack mounting hardware for proper installation.

If using an optional MicroPOD that was purchased separately, please see instructions shipped with the MicroPOD for the
installation instructions. This should be done before connecting the UPS to utility power.

If the hardwired MicroPODs are being used, conduit entry knockout are provided. Input and output wiring should be
installed in separate conduits. All wiring should be done in accordance to all local and national electrical codes. Before
wiring the UPS ensure that the breaker in the external upstream panelboard is OFF.

If an optional POD with attached input cord and output receptacles are used, connect the input plug receptacle and
connect the connected equipment to the output receptacles.

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The Liebert® GXT3™ 500-3000 VA models ship with the internal battery installed. Locate the plastic bezel from the

UPS Model

Recommended
External Over
Current Protection

NEMA Input Plug
Provided

NEMA Input Plug
Provided

GXT3-500RT120
GXT3-700RT120
GXT3-1000RT120
GXT3-1500RT120

GXT3-1000MT120

15A

5-15
GXT3-2000RT120

20A

5-20

GXT3-3000RT120

30A

L5-30

GXT3-3000RT208

20A

L6-20

shipping box and attach the bezel to the UPS taking care to align the fastening clips on both ends before inserting them
into the holes.

If your application requires the use of external battery cabinets for longer back up time requirements, connect the first
battery cabinet to the UPS with the cable provided with the battery cabinet. Note: it does not matter which connector is
used on the battery cabinet. If more than one battery cabinet is used the additional cabinets then connect to the adjoining
battery cabinet.

To complete the installation of the UPS, simply connect the input plug on the attached 10 foot input cord to the proper wall
receptacle per the following table. Note: the 500-2000VA UPS models will now have power and the AC Input indicator on

the display should illuminate. The UPS will also begin to charge the internal batteries at this point, so there will also be
battery capacity LEDs illuminated.

The Liebert GXT3 UPS is ready to be powered.

1. If an optional MicroPOD was used, ensure that the maintenance bypass switch is in the UPS position.

2. Install any optional Intellislot communication card into the Intellislot port on the rear of the unit.

3. Ensure the input breaker in the panelboard that provides input power to the UPS is closed

4. For 3000 VA models only, close the input breaker on the rear of the UPS unit. Note: the UPS will now have power

and the AC Input indicator on the display should illuminate. The UPS will also begin to charge the internal
batteries at this point, so there will also be battery capacity LEDs illuminated.

5. The Liebert GXT3 UPS has customizable settings that might be required depending on the application. Please
review the CD that ships with the UPS unit for the steps to use the configuration program and make any
necessary changes. Once that is complete, proceed to the next step.

6. If external battery cabinets are used, close all breakers on the rear of each battery cabinet

7. Press and hold for about 4 seconds, the “ON” button on the UPS display. Note: this will apply power to the output
receptacles via the internal bypass and the bypass indicator will be illuminated along with an audible beep.

8. Over the next several seconds the UPS will perform the self checks and startup routine then automatically
transfer the connected equipment to the inverter power. Once that is complete, the bypass indicator will turn off
and the inverter indicator will illuminate.

The UPS is now running in normal operation mode providing protected, filtered power to the connected equipment.

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