Emerson 240V Manuel D’Utilisation

To connect the input wiring, follow these steps:
1. Locate the input wiring access, remove the knockout and 

pull the three input wires through it, allowing some slack 

for installation.

2. Secure the conduit to the rear panel of the UPS. 
3. Input Power cables connect to screw terminals on the 

Input Terminal Block located to the right of the Bypass 

Voltage Terminal. Connect the wires to the block 

connections as shown below. Using a torque wrench, turn 

the screws clockwise until tightened to the proper torque 

value (28 in-lb). Insert the ground wire through the 

grounding lug and tighten it to the proper torque value 

(120 in-lb).

Grounding Conductor Installation
An insulated grounding conductor must be identical or larger 

in size, insulation material, and thickness as the grounded 

and ungrounded branch circuit supply conductors. This cable 

must be green with or without one or more yellow stripes and 

is to be installed as part of the branch circuit that supplies 

the unit or system.
The grounding conductor is to be grounded to earth at the 

service equipment or, if supplied by a separately derived sys-

tem, at the supply transformer or generator set.

Output wiring may be configured one of two different 

ways (240/120 or 208/120). Refer to the chart below 

and the diagram at right when configuring the out-

put wiring.

1 & 4

3 & 4

2 & 3

1 & 3

Use only the connections listed above. Other connections will 
produce nonstandard voltages.

NOTE
The Nfinity UPS contains an isolation 

Note the Neutral / Earth 
jumper on the terminal 
above