Vertiv™ | Liebert® EXM
™
50-250kVA, 480V, 60Hz User Manual | 14
Provide at least the minimum clearance required by NEC on all sides of the UPS, including 36"
(914mm) in front, to permit routine tightening power terminations within the UPS and free
passage of personnel with the door fully opened. Depending on the floor anchoring system used,
up to 5" (127mm) may be required in the rear of the UPS.
There are no ventilation grilles on the sides or back of the UPS.
Leave a minimum of 24 in. (610mm) between the top of the UPS frame and the ceiling to permit
adequate air circulation above the unit. Vertiv
™
recommends against using air conditioning or
other systems that blow air onto the top of the unit.
2.5.3 Floor Installation
If the Liebert
®
EXM
™
is to be placed on a raised floor, the UPS should be mounted on a pedestal
that will support the equipment point loading. Refer to the bottom view in Figure 1 to design this
pedestal.
2.5.4 Cable Entry
Cables can enter the Liebert
®
EXM
™
from the top or bottom for the 250kVA; cable entry is bottom
only for the 50-200kVA through removable metal plates.
Some plates have factory-punched holes and others are designed to allow the personnel to
punch holes for fitting and securing the conduit. Once the conduit holes are punched, these
plates should be reattached to the UPS. The conduit size and wiring method must be in
accordance with all local, regional and national codes and regulations, including NEC ANSI/NFPA
70.
The UPS must be accessible from the front to allow personnel to complete the cable connections
and make necessary adjustments.
NOTE
When installing the UPS, the customer must provide a disconnect with overcurrent protection at
the output of the UPS.
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