Introduction and System Description
1.0INTRODUCTION AND SYSTEM DESCRIPTION
Congratulations on your choice of the Liebert
The 3U POD provides an isolated path of power for your UPS system for preventive maintenance or service. As shipped, cords and receptacles provide ready to use UTILITY and LOAD connections. Optionally, the utility input and/or the load output may be converted to hardwiring,
1.1System Description
The 3U 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
Utility | POD | Connected |
| ||
|
| loads |
UPS
•In UTILITY mode, the power is routed around (bypassing) the UPS system (see Figure 2). Util- ity power is supplied directly to the load through the 3U POD.
! CAUTION
Battery
Figure 2 UTILITY/maintenance bypass mode
Utility | POD | Connected |
| ||
|
| loads |
UPS
•In Utility mode, the UPS may be turned off and removed without affecting the load. See Figure 3.
Figure 3 Front panel view showing plug-in connections to and from the UPS
INPUT CORD FROM UTILITY | Rotary switch and |
| |
Connect to wall receptacle |
| ||
power indicator lamps | Load connections | ||
| |||
|
|
| CAUTION |
| IF UTILITY LAMP IS ILLUMINATED |
| MAINTENANCE BYPASS POSITION |
| MAY BE SELECTED |
| SWITCH TO UPS POSITION ONLY |
| WHEN UPS LAMP IS ILLUMINATED |
UTILITY | 16A/208V~ |
| CONNECT UPS |
| LINE CORD HERE |
UPS | MAINTENANCE |
|
|
BYPASS |
| OUTPUT | |
AVAILABLE | AVAILABLE |
| |
|
|
| 12A/208V~ |
|
|
| ON |
|
| OUTPUT | OUTPUT |
UPS | UTILITY | 16A/208V~ | 16A/208V~ |
|
|
LOAD
OFF
CONNECT TO
UPS OUTPUT
UTILITY PANEL | Connect |
| LOAD PANEL | |
UPS input |
| |||
Remove for |
| Remove for | ||
cord here |
| |||
hardwire | CORD TO UPS | hardwire | ||
| ||||
conversion |
| Connect to load receptacle of UPS | conversion |
3
