1 Important Safety Instructions
SAVE THESE INSTRUCTIONS
This manual contains important safety instructions that should be followed during the installation and maintenance of the
Vertiv™ Liebert® MCV. Read this manual thoroughly before attempting to install or operate this unit.
Only qualified personnel should move, install or service this equipment.
Adhere to all warnings, cautions, notices and installation, operating, and safety instructions on the unit and in this manual.
Follow all installation, operation, and maintenance instructions and all applicable national and local building, electrical, and
plumbing codes.
WARNING! Arc flash and electric shock hazard. Open all local and remote electric power supply disconnect
switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective
equipment (PPE) per NFPA 70E before working within the electric control enclosure. Failure to comply can
cause serious injury or death. Customer must provide earth ground to unit, per NEC, CEC, and local codes, as
applicable. 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 Vertiv™ Liebert® iCOM™
controller does not isolate power from the unit, even in the Unit Off mode. Some internal components require
and receive power even during the Unit Off mode of the Liebert® iCOM™ controller. The only way to ensure
that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit
electrical schematic. Follow all local codes.
WARNING! Risk of electric shock. Can cause equipment damage, injury or death. Open all local and remote
electric power supply disconnect switches and verify with a voltmeter that power is off before working within
any electric connection enclosures. Service and maintenance work must be performed only by properly
trained and qualified personnel and in accordance with applicable regulations and manufacturers’
specifications. Opening or removing the covers to any equipment may expose personnel to lethal voltages
within the unit even when it is apparently not operating and the input wiring is disconnected from the
electrical source.
WARNING! Risk of electric shock. Can cause serious injury or death. The Liebert® iCOM™ microprocessor
does not isolate power from the unit, even in the Unit Off mode. Some internal components require and
receive power even during the "unit off" mode of the Liebert® iCOM™ control. Open all local and remote
electric power disconnect switches and verify with a voltmeter that power is Off before working on any
component of the system.
WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote electric power
supply disconnect switches and verify with a voltmeter that power is off before working within the fan motor
electric connection enclosures. Fan motor controls can maintain an electric charge for 10 minutes after power
is disconnected. Wait 10 minutes after power is verified as off before working within the fan electric
control/connection enclosures. Use only fully trained and qualified HVAC technicians to perform maintenance
on the fans.
1 Important Safety Instructions Proprietary and Confidential ©2024 Vertiv Group Corp. 1
Vertiv™ Liebert® MCV Installer/User Guide
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