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Battery Installation
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4.3 UPS Batteries—Liebert
®
APM 45kVA Frame Only
The Liebert APM’s internal batteries are fully charged before the unit is shipped. During storage and
transportation, some charge is lost. All batteries should be recharged before use. The battery charger
works only when the Liebert APM is connected to input power and turned On.
4.4 External Battery Cabinet Installation
4.4.1 Matching Battery Cabinets
A matching battery cabinet is available. Refer to Figure 20. The same model battery cabinet may be
installed in parallel in multiple cabinet strings for additional capacity. Battery run time depends on
the cabinet model, the number of cabinets and the load on the UPS.
Handling—The battery cabinet has casters to facilitate movement over short distances. The bottoms
of the battery cabinets are reinforced to permit movement by forklift over longer distances.
Inspection—Remove all panels and visually inspect the batteries, bus connections, and cabinet for
any damage. Exercise caution; voltage is present within the battery cabinet even before installation.
If there are signs of damage, do not proceed. Call Liebert Services at 1-800-542-2378.
Storage—The batteries can be stored for up to six months without appreciable deterioration. If
planning to store a battery cabinet for longer than six months or at temperatures higher than 77°F
(25°C), contact Liebert Services for recommended precautions.
The following notes, in conjunction with the diagrams (Figure 20), illustrate the broad principles to
be followed when fitting and connecting the majority of battery cabinet installations.
When installing an external battery cabinet that is NOT a Liebert APM battery cabinet, the customer
must provide overcurrent protection. See Table 43 for sizing of protection devices.
NOTE
Full safety instructions concerning the use and maintenance of UPS batteries are provided in
the appropriate battery manufacturer's manuals, available on the manufacturer’s Web site.
The battery safety information contained in this section relates to key considerations that must
be taken into account during the installation design process and might affect the design
outcome, depending on your installation.
!
CAUTION
Any battery system should be installed by properly trained and qualified personnel.
NOTE
When using an external battery supply that is not provided with the UPS, please make
reference to the battery manufacturer’s installation manual for battery installation and
maintenance instructions, available on the manufacturer’s Web site. When replacing batteries,
Emerson recommends that the batteries in external cabinets be the same type used internally in
the Liebert APM. See Tables 39 and 40 for batteries that are approved for use with the Liebert
APM.