User Guide

3
INTRODUCTION AND SYSTEM DESCRIPTION
Congratulations on your choice of the Liebert 2U POD
™
. The Liebert 2U POD provides main-
tenance bypass capability as well as power output distribution. The Liebert 2U POD can be
used on UPSs in the rack mount or tower configuration.
The Liebert 2U POD provides an isolated path of power for your UPS system for preventive
maintenance or service.
System Description
The 2U POD has two modes of operation: UPS (UPS available) and UTILITY (maintenance
bypass).
•In UPS mode, the power is routed through the UPS system delivering conditioned power
to the load, as shown in Figure 1.
Figure 1 UPS mode of operation
•In UTILITY mode, the power is routed around (bypassing) the UPS system (see
Figure 2). Utility power is supplied directly to the load through the 2U POD.
Figure 2 UTILITY/maintenance bypass mode
• The UPS may be turned off and removed without affecting the load. See Figure 3.
Figure 3 2U POD connections
!
CAUTION
Battery back-up and conditioned power are NOT available during
the UTILITY mode of operation.
Utility
POD
UPS
Connected
loads
Utility
Connected
loads
POD
UPS
OUTPUT
UPS
PUSH TO RESET
UPS
AVAILABLE
UPS UTILITY
MAINTENANCE BYPASS
AVAILABLE
CONNECT UPS
LINE CORD HERE
PUSH TO RESET
IF UTILITY LAMP IS ILLUMINATED
MAINTENANCE BYPASS POSITION
MAY BE SELECTED
SWITCH TO UPS POSITION ONLY
WHEN UPS LAMP IS ILLUMINATED
CAUTION
OUTPUT
UTILITY
15
A
M
P
15
A
M
P
Connect loads
UPS INPUT - Connect to load
receptacle on rear of UPS
Rotary switch and
power indicator lamps
UTILITY INPUT - Connect to
utility wall receptacle
Connect UPS
input cord here
Connect loads