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Installation and Configuration
Liebert
®
GXT3
™
16
5.3 Connect Input/Output Power
Figure 10 Power Distribution box removal—captive screws and maintenance bypass breaker
The UPS should arrive with the power distribution box attached. If the box needs to be removed for
maintenance or replacement, follow these instructions to remove and install the power distribution
pack.
To remove:
1. Ensure maintenance bypass lamp is on. To place the unit in maintenance bypass, see 8.4 - Put
the Liebert GXT3 in Manual Bypass.
2. Loosen one captive screw over the maintenance bypass breaker.
3. Turn the maintenance bypass breaker on.
NOTICE
The load is unprotected from disturbances in the power supply while the UPS is on bypass.
4. Turn the output and input breaker off.
5. Loosen other captive screws until the power distribution box releases.
6. Remove the power distribution box from the UPS and set it aside.
7. Loosen screws over the plastic cover for the connector on the rear of the panel.
8. Slide plastic cover over connector and tighten screws.
To install:
1. Align connectors and press box onto UPS
2. Hold box firmly against UPS and tighten captive screws except one over the maintenance bypass
breaker.
3. Turn the output and input breaker on.
4. Start the UPS according to startup instructions.
5. Verify that the UPS lamp is illuminated.
6. Turn the maintenance bypass breaker off.
7. Insert the maintenance bypass cover behind the captive screw and tighten the screw.
NOTE
Do not operate the UPS with this box removed. To disconnect all power to this box and load, the
utility input power also must be disconnected.
NOTE
The maintenance bypass breaker cover must be installed behind the captive screw and the
screw must be tightened for the UPS to operate in inverter mode.
Extract
these
captive
screws
Maintenance
Bypass Breaker