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Single Module UPS Installation
6
1.4.5 Clearances
The Liebert NX has no ventilation grilles at either side of the UPS. To enable routine tightening of
power terminations within the UPS, in addition to meeting any local regulations, Liebert recom-
mends providing adequate clearance in the front of the equipment for unimpeded passage of person-
nel with the doors fully opened. It is important to leave 800mm (31.5") clearance above the UPS to
permit adequate circulation of air coming out of the unit.
1.4.6 Access
The component layout of the UPS supports front and top access while servicing, diagnosing and
repairing the UPS, thus reducing the space requirement for side and rear access.
1.4.7 Final Positioning
The UPS cabinets are fitted with casters on the base to allow ease of movement and positioning.
When the equipment has been finally positioned, ensure the adjustable feet are set so that the UPS
will remain stationary and stable.
1.4.8 Floor Anchoring
Diagrams in 5.0 - Installation Drawings show the location of the holes in the base plate through
which the equipment may be bolted to the floor. If the equipment is to be installed on a raised floor it
should be mounted on a pedestal suitably designed to accept the equipment point loading.
1.4.9 Cable Entry
Cables can enter the Liebert NX UPS and battery cabinet from below. Cable entry is made possible by
removing a blanking piece fitted at the bottom of equipment to reveal the cable entry hole.
Top Cable Entry—Optional
Optionally a top cable entry extension may be used. The cabinet extends the overall width of the UPS
and permits connection of all incoming AC/DC power cables from above.
The top cable entry option is fitted on the side of the UPS cabinet and is supplied without side panels;
the side cover from the UPS being used.
The cabinet with cables coming in from the top for the 30-40 kVA UPS must be positioned on the left
side; the cabinet for the 60 to 200 kVA UPS can be positioned on either side.
This facilitates cable entry through the top metal panel after the appropriate cable entry holes have
been cut.
1.5 External Protective Devices
Circuit breakers or other protective devices must be installed in the AC supply, external to the UPS.
This chapter provides guidelines for qualified installers who must have knowledge of local wiring
practices pertaining to the equipment to be installed.
!
WARNING
Casters are strong enough for movement across even surfaces only. Caster failure could occur
if they are subjected to shock loading.
NOTE
The top cable entry also includes the power connection cables between the cabinet and the UPS.