Expansion Qbl24 Battery Unit Installation - Northern Telecom Meridian SL-1 Installation Manual

2-26 Installation and connections
Chart 2-4
EXPANSION QBL-24 BATTERY UNIT INSTALLATION
STEP PROCEDURE
1 Set the breaker on the front of the QBL24 unit to OFF.
2 Remove cover from the QBL24 unit by loosening the captive screws on top of the unit.
3 Unpack batteries and place in unit as shown in Fig. 2-8.
Ensure that the date indicated on the battery packs is the same on all packs.
WARNING: The battery cells are capable of delivering high currents when externally
short-circuited. Caution must be used when working near the open terminals of the
batteries to ensure that the terminals are not inadvertently short-circuited.
4 With the three black jumper wires supplied with the batteries, connect the four battery
packs in series as shown in Fig. 2-8. Connect the large lug of the black to the large
terminal (+) on the first battery pack. Connect the small lug of the wire to the small
terminal (-) on the second battery pack and so on until all packs are interconnected.
Ensure that connections to the battery terminals are secure but do not over-tighten
(maximum torque not to exceed 35 in/lb (3.95 N.m.)).
5 Connect the black wire inside the battery unit to the remaining positive (+) battery
terminal and the red wire to the remaining negative (-) battery terminal.
6 If the expansion QBL24 battery unit is being added to a main QBL24 unit previously
connected to an operating cabinet, remove the front covers from the cabinet.
Set the following breakers to OFF:
• the AC BRKR breaker on front of -48 V rectifier
• the DC BRKR on front of main QBL24 battery unit.
• the CAB INP breaker on the QUX19 unit.
7 Remove cover from top of the main QBL24 battery unit.
8 Remove plug from top hole on the right side of the main QBL24 battery unit (Fig. 2-
10).
9 Remove lock nut from the 90° elbow on the end of the flexible conduit containing
wiring from the expansion QBL24 unit.
10 Insert the wires and the 90° elbow in the top hole on the right of the existing QBL24
Appendix 1 to 553-2601-200
battery unit (Fig. 2-10).