Chapter 8 Operation 27
Chapter 8 Operation
This section describes checks to be made before starting the UPS, how to start the UPS, manual battery test, manual
bypass, shutting down the UPS and disconnecting the utility power from the UPS.
Note
The Liebert® GXT4’s battery has been fully charged before delivery, but some charge will be lost during storage and shipping.
To ensure that the battery has adequate reserve power to protect the connected load, charge the battery for three hours before
putting the UPS into service.
8.1 Startup Checklist For Liebert GXT4™
Before starting the UPS, perform these checks:
1. Check that the input plugs and loads are connected properly and reliably.
2. Check that the battery cable is connected properly.
3. Check that the communication cables are connected properly.
8.2 Initial Startup And Electrical Checks
1. Verify that the Input/Output circuit breakers are off.
2. During initial system checks, disconnect all loads (open load disconnects).
3. Inspect all wiring, cables and connection.
4. If external battery cabinets are used, verify that the battery interconnect cables are fully inserted in the sockets.
5. Place the manual bypass breaker in BYPASS position.
6. Turn on the branch circuit disconnect to apply voltage to the input terminal block.
7. Using a voltmeter, verify the expected L1-N (L2) voltage.
Verify that the same voltages appear at the Output terminals. The Bypass lamp by the switch will light.
8. After verifying proper input voltage to the UPS terminal block, turn off the branch circuit power, close all access
panels to the distribution box and reapply input power.
9. Close the Input circuit breaker located on the distribution box. The green AC INPUT lamp should illuminate on the
front panel.
10. Select Main Menu -> 3 CONTROL -> 1 TURN ON & OFF to enter the TURN ON & OFF screen, and select ‘TURN
UPS ON’ to turn on the UPS.11. Close the Output circuit breaker on the rear of the power distribution box. The light
by the input breaker will illuminate.
12. Return the breaker to the Inverter position. The output terminal block will be powered at this time.
13.Connect all loads for normal operation.
8.3 Manual Battery Test
To initiate a manual battery test,
Select Main Menu -> 3 CONTROL -> 3 BATT TEST to enter the BATT TEST screen, and select ‘1 START’ to start
manual battery test.
while the UPS is operating from utility power with no alarm conditions present.
8.4 Put Liebert® GXT4™ In Bypass
Select Main Menu -> 3 CONTROL -> 1 TURN ON & OFF to enter the TURN ON & OFF screen, and select ‘TURN
UPS BYPASS’ to transfer the UPS to bypass.
Liebert GXT4 UPS 5000VA ~ 10000VA (230V) User Manual
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