Liebert 1500 - Manual (Page 53)

Maintenance 47
5.3.3 Adding or Replacing a Battery String
For replacements, proceed from Step 1 below. For new installations, go to Step 5 of this proce-
dure.
1. Removal of the old string:
Notify the alarm center of the possibility of incoming alarms during this procedure.
2. Above the battery stand, or at the top of the main cabinet for a 1500, 3000 or 4000 A system,
or at the overhead busbars for a 6000 A system, locate, disconnect and isolate the charge leads
(+ and -) coming from the batteries being replaced.
3. Disconnect the inter-cell connectors from the individual battery cells, and insulate each
exposed terminal with electrician tape.
4. The removed batteries shall be disposed of in accordance with local, state and national
environmental legislation.
5. Installation of the new string:
If this is an addition, locate and install the new battery stand according to the specifications
and drawings. If this is a replacement, install the new battery string in the space vacated by
the removed one.
6. Install the new batteries and use the new connecting material supplied with the batteries to
interconnect them.
7. Perform the initial charging of this new battery string according to the battery
manufacturer’s specifications using an external power supply.
8. Above the battery stand, or at the top of the main cabinet for a 1500, 3000 or 4000 A system,
or at the overhead busbars for a 6000 A system, connect the charge leads (+ and -) coming
from the new batteries.
9. Notify the alarm center of the end of the procedure.
!
WARNING
THIS PROCEDURE IMPLIES THAT ALL OR PART OF THE
BATTERIES WILL BE MOMENTARILY TAKEN OUT OF
SERVICE.
THIS WORK SHOULD THEN BE COMPLETED DURING
REDUCED TRAFFIC HOURS AND/OR WITH A DIESEL
GENERATOR BACKUP AVAILABLE TO ENSURE NO LOSS OF
SERVICE DURING A POSSIBLE AC OUTAGE. IF MORE THAN
ONE STRING IS TO BE REPLACED, REPLACE ONLY ONE
STRING AT A TIME AND DO NOT DISCONNECT THE NEXT
STRING BEFORE THE PREVIOUS ONE IS RECONNECTED.