Installation Instructions

Break er Module Assembly (BMA) Chapter 9: PDU R eplacement Procedures
Procedure 9 -3 R emo ving the failed BMA (Continued)
Mak e sure the facilit y circuit break er controlling external AC or DC power , whichev er
is applicable, to the UBS Macro B T S fr ame is set to the OFF position.
Y ou will be disconnecting multiple cables from connectors. If necessary , use
masking tape and a marker and temporarily tag each cable as to the proper
connector before disconnection.
3
Set all PDU front panel circuit breakers to the off (pulled out) position.
4
Disconnect all DC power cables from the PDU front panel. Dress these cables away from
the PDU front panel.
5
Remove the PDU front panel as follows:
• See Figure 9-1 PDU Front P anel Removal/Installation Detail on page 9- 12 .
• While depressing the front panel cover latch tab on the left and right front ends of the
PDU , slide the PDU front panel forward and off of the PDU .
6
Remove the BMA as follows:
• See Figure 9-2 PDU Front P anel (cover removed) on page 9- 12 .
• Locate the BMA to be removed.
• Using a TORX T25 driver , remove the BMA mounting screws.
• Remove the BMA from the PDU .
Procedure 9 -4 Installing the replacement BMA
A T THE BTS SITE
1
BMA mounting screws must be tightened to the specied torque to prev ent arcing
and possible re hazard.
Install the replacement BMA as follows:
• See Figure 9-2 PDU Front P anel (cover removed) on page 9- 12 .
Continued
9 -10 68P09283A64 -3
FOA SEP 2007