Emerson 50 and 60 Hz Manuel D’Utilisation

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.

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.

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.

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.

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.

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. 

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.

 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.