Powerware 6000 - Manual (Page 62)

UPS Operation
54 Powerware ® 9 Prestige Series User’s Guide (4500/6000 VA)
S
Rev H www.powerware.com
Using the PPDM
The PPDM provides continuous online power for your equipment. With
the PPDM, you can replace or upgrade the PPU without losing power to
your equipment. Figure 23 shows the operation of the UPS with the
PPDM.
PPU
In
Out
Battery Battery
Utility
Power
PPDM UPS Load
Figure 23. UPS and PPDM Block Diagram
Using Maintenance Bypass
Use the following procedure to transfer the critical load to Maintenance
Bypass (AC Line operation) and remove the PPU:
1. Turn the Bypass switch on the PPDM to the BYPASS position
(see Figure 24). The PPDM is now powering your equipment
from utility power.
2. Press and hold the Output Off button until the long beep
ceases (approximately three seconds). The
µ
indicator
remains lit.
3. Switch the PPU input breaker to the OFF (O) position.
The UPS enters Battery mode for several seconds. The
µ
indicator turns off and the UPS shuts down.