Northern Telecom QCA146 Installation And Testing Instructions page 57

1 1 Set the CAB INP breaker on the QUX19 unit to ON. Service
should be restored to the cabinet.
12 Reinstall the cabinet cover (if required).
C h a r t 3 - 8
QUD24 fan unit installation
Step P r o c e d u r e
1 If not previously removed, remove the lower front and top rear
covers.
2 Remove screws securing cabinet top assembly and remove
assembly and louvers (Figure 2-11).
3 Position QUD24 cooling units in their assigned location on the
cabinet top panel and secure with mounting screws (Figure 2-12).
4 Connect a QCAD302 power cable from connector P2 on the first
QUD24 unit to connector P1 on the second QUD24 unit
(Figure 2-12).
5 Connect the male connector of a QCAD303 power cable to
connector P1 on the second QUD24 unit (Figure 2-12).
6 Connect the other end of the QCAD303 power cable to
connector CU1 of the QCAD277 power cable at the rear of the
cabinet (Figure 2-12).
7 Install a QCAD304 terminating plug in connector P2 on the first
QUD24 cooling unit (Figure 2-12).
8 Secure cooling units cables to cabinet top panel with plastic cable
ties to avoid interference with fans.
9 Remove and store the six screws from the cabinet top assembly
and insert six replacement screws (longer screws supplied with
cooling unit assemblies).
Note: The six removed screws should be retained for future
use.
2-Mb/s Remote Peripheral Equipment
Installation
Appendix 1 to 553-2741-200
3-51