Using The Ppdm; Disconnecting The Ups - 3Com Powerware Uninterruptible Power System Prestige Series Installation And Operator's Manual

Using the PPDM

The PPDM provides continuous online power for your equipment. With
the PPDM, you can replace or upgrade the UPS without losing power to
your equipment. Figure 16 shows the operation of the UPS with the
PPDM.

Disconnecting the UPS

Use the following procedure to transfer the critical load to Maintenance
Bypass (AC Line operation) and remove the UPS:
Powerware ® Prestige Series Installation and Operator's Manual for IBM Applications (3000 VA) Uncontrolled Copy
In
UPS
Out
Battery
Figure 16. UPS and PPDM Block Diagram
1. Turn the Bypass switch on the PPDM to the BYPASS position
(see Figure 17). The PPDM is now powering your equipment
from utility power.
2. Press and hold the Output
ceases (approximately three seconds). The
remains lit.
3. Remove the Y-cord connections from the UPS rear panel.
Do not remove the input power cord or your equipment from the PPDM.
Utility
Power
PPDM
Battery Battery
Off button until the long beep
C A U T I O N
UPS Operation
UPS Load

indicator
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