Emerson Liebert GXT3-3000RT120 UPS User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your Emerson Liebert GXT3-3000RT120 Uninterruptible Power Supply (UPS). The Liebert GXT3-3000RT120 is a true on-line UPS designed to deliver continuous, high-quality AC power to critical IT equipment, ensuring no interruption during power transfers to battery. Please read this manual thoroughly before installation and use, and retain it for future reference.

2. Safety Information

Observe the following safety precautions to prevent injury and damage to the UPS or connected equipment:

• Electrical Hazard: This unit contains hazardous voltages. Do not open the UPS enclosure. Servicing should only be performed by qualified personnel.
• Battery Safety: Batteries can present a risk of electrical shock and high short-circuit current. Remove watches, rings, or other metal objects before handling batteries. Use tools with insulated handles.
• Ventilation: Ensure adequate airflow around the UPS. Do not block ventilation openings.
• Environment: Install the UPS in a controlled environment, free from excessive dust, moisture, and extreme temperatures.
• Grounding: The UPS must be connected to a grounded AC power outlet.

3. Package Contents

Verify that all items are present in the packaging:

• Liebert GXT3-3000RT120 UPS Unit
• User Manual (this document)
• Rackmount Kit (if applicable)
• Tower Stand (if applicable)
• Input Power Cord
• Output Power Cords
• Communication Cables (USB, Serial)

4. Product Overview

The Liebert GXT3-3000RT120 is a versatile UPS designed for both tower and rack-mount installations. It provides 3000VA/2700W of power protection.

4.1 Front Panel

Figure 1: Front panel of the Liebert GXT3-3000RT120 UPS. This image displays the front panel of the Liebert GXT3-3000RT120 UPS, featuring the Emerson logo, the Liebert GXT3 display, and ventilation grilles. The display provides information on battery status, load level, and operational warnings.

The front panel includes an LCD display for monitoring UPS status, battery charge, load level, and various operational indicators. It also features control buttons for power on/off and menu navigation.

4.2 Rear Panel Connections

The rear panel provides the following connections:

• Input Power: Connects to the main AC power source.
• Output Receptacles: Includes one NEMA L5-30R and six NEMA 5-20R outlets for connecting protected equipment.
• Communication Ports: USB and Serial ports for connecting to a computer for monitoring and management.
• Expansion Slot: For optional communication cards.

5. Setup

5.1 Placement

The Liebert GXT3-3000RT120 can be installed in a tower configuration or mounted in a standard 19-inch equipment rack.

• Tower Installation: Attach the provided tower stands to the bottom of the UPS unit. Ensure stability.
• Rack Installation: Use the supplied rackmount kit to secure the UPS in a rack. Follow the instructions provided with the rackmount kit for proper installation.

Ensure the installation location has adequate ventilation and is within the specified environmental operating conditions.

5.2 Connecting to Power

1. Connect the UPS input power cord to a properly grounded AC power outlet.
2. Allow the UPS to charge its batteries for at least 8 hours before connecting critical equipment to ensure full runtime capability.

5.3 Connecting Equipment

Connect your IT equipment to the output receptacles on the rear panel of the UPS. Ensure that the total load does not exceed the UPS capacity (3000VA/2700W).

6. Operating the UPS

6.1 Turning On the UPS

1. Ensure the UPS is connected to AC utility power.
2. Press and hold the power button on the front panel for approximately 2 seconds until the display illuminates and the UPS starts.

6.2 Turning Off the UPS

1. To shut down the UPS and remove power from connected equipment, press and hold the power button for approximately 3 seconds.
2. The UPS will perform a controlled shutdown.

6.3 Understanding the Display

The front panel display provides real-time information:

• Battery Status: Indicates the current charge level of the internal batteries.
• Load Level: Shows the percentage of the UPS's capacity being used by connected equipment.
• Operating Mode: Displays whether the UPS is operating on utility power, battery power, or bypass mode.
• Alarms/Warnings: Icons illuminate to indicate various operational issues or warnings. Refer to the troubleshooting section for details.

7. Maintenance

7.1 Battery Replacement

The UPS uses sealed lead-acid batteries. Battery life is typically 3-5 years, depending on environmental conditions and usage. When batteries reach the end of their service life, they should be replaced by qualified personnel. Contact Emerson/Liebert support for authorized service or replacement battery kits.

7.2 Cleaning

Periodically clean the exterior of the UPS with a soft, dry cloth. Ensure ventilation openings are free from dust and debris to maintain proper airflow.

8. Troubleshooting

This section provides solutions to common issues. For problems not listed here, contact technical support.

9. Specifications

10. Warranty and Support

For specific warranty details, please refer to the warranty card included with your product or visit the official Emerson/Liebert website. Technical support is available to assist with installation, troubleshooting, and service inquiries. Please have your model number (GXT3-3000RT120) and serial number ready when contacting support.

Online Resources: For the latest documentation, FAQs, and software downloads, visit the Emerson Network Power support portal.