Ups Start-Up - Vertiv Liebert EXS Installer/User Manual

4.2 UPS Start-up

Perform start-up only after the UPS installation is complete, all UPS wiring is complete, and all exterior
access panels that were removed for installation are replaced on the UPS.
The start-up procedure starts the UPS in Normal Mode providing clean and protected AC power to the
connected equipment.
To start the UPS:
1. Close the upstream feeder breakers for the UPS rectifier and bypass (if wired as dual input).
2. Close all downstream breakers including distribution-panel main breaker and/or branch circuit
breakers. If optional PODs are installed, verify that all distribution breakers on the PODs are
closed.
3. Ensure that the UPS maintenance bypass breaker (MBB) on the front of the UPS is OPEN and
the mechanical interlock is secured in the lower position (near the breaker handle), see Figure
4.1 on page 41.
4. Close the rectifier-input breaker (RIB), bypass-input breaker (BIB), and maintenance-isolation
breaker (MIB) on the rear of the UPS, see Figure 4.1 on page 41, and Figure 4.2 on the
previous page.
NOTE: The MIB is also the main output breaker of the UPS.
When the RIB and BIB breakers are closed, the UPS automatically begins the start-up process
and the boot-up system checks, which take approximately 20-30 seconds
5. Before continuing to step 6, make any changes/customization to the UPS operating
parameters for the installation or application, see
page 37.
6. After the system checks complete and/or operating parameters are set, press the power
button at the front-panel display, then use the up/down arrow buttons to confirm Turn on local
INV, see Figure 4.3 below.
Figure 4.3 Turn on local INV
4 Operating the UPS
Editing Display and Operation Settings on
43