Storage Temperature; External Bypass Switch (Make-Before-Break Only) Operation; Battery Replacement - Powerware 9170 User Manual

Maintenance

Storage Temperature

Store the Powerware 9170 battery modules (in the unit or battery
cabinet) at –20 to +40°C (–4 to +104°F). Batteries will have a longer
shelf life if they are kept below +25°C (+77°F). The Powerware 9170
UPS or battery cabinet without batteries may be stored at –40 to +60°C
(–40 to +140°F).

External Bypass Switch (Make-Before-Break Only) Operation

Before turning the Powerware MBB bypass switch, you must press the
red button located next to the handle. This button serves two purposes.
It sends an electrical signal to the UPS to switch to the internal Bypass
mode (if it is not already operating in that mode). The button also
operates a mechanical interlock, to prevent the switch from being
turned without first signaling the UPS.

Battery Replacement

The Powerware 9170 hot-swappable feature allows you to replace the
battery modules easily without disconnecting the load or damaging the
batteries.
Use the following procedure to replace battery modules in pairs.
74
NOTE When the red button is released, the UPS remains in its internal Bypass mode
and must be manually returned to the Auto mode by selecting that mode on the front
panel display.
NOTE The Powerware 9170 UPS will operate with uncharged (or no) batteries, but
will have limited (or no) battery backup capability. Backup protection requires at least
three battery strings for every four power modules.
1. Remove the front panel bezel(s) covering the battery modules
you need to replace. Label the original module with masking
tape or some other identifier.
2. Grasp the battery module handle and press down on the latch
release.
3. Pull the module out approximately 7
stop on top of the module.
2
(17 cm) to the secondary
Powerware 9170 User's Guide
®
:
www.powerware.com