Electrical Connections - Emerson Liebert CRV User Manual

9.2

Electrical Connections

WARNING
!
Arc flash and electric shock hazard. Can cause injury and death.
Open all local and remote electric power supplies, verify with a voltmeter that power is Off
and wear appropriate personal protective equipment per NFPA 70E before working within
the electrical control enclosure.
Before proceeding with installation, read all instructions, verify that all the parts are included
and check the nameplate to be sure the voltage matches available utility power.
The Liebert iCOM
mode.
Some internal components require and receive power even during the Unit Off mode of the
Liebert iCOM control.
The factory-supplied optional disconnect switch is inside the unit. The line side of this switch
contains live hazardous voltage potential.
Install and open a remote disconnect switch and verify with a voltmeter that live hazardous
voltage potential is not present inside the unit cabinet before working within. Refer to the
unit electrical schematic.
Follow all national and local codes.
WARNING
!
Risk of electric shock. Can cause injury or death.
This unit has a high leakage current potential. Proper earth ground connection per national
and local codes is required before connection to the electric power supply.
Before proceeding with the electrical connections, ensure that:
• all electrical components are undamaged
• all terminal screws are tight
• the supply voltage and frequency are as indicated on the unit
NOTE
The serial tag on the 600mm (24") unit will be found on the inside of the display panel. The
serial tag on the 300mm (12") units will be on the narrow side of the electric panel, nearest the
filters.
® ™
Liebert CRV
microprocessor does not isolate power from the unit, even in the Unit Off
®
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Electrical Connections