11 Initial Start-up Checks and Commissioning Procedure
for Warranty Inspection
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
factory supplied, optional disconnect switch is inside the unit. The line side of this switch contains live high
voltage. 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 serious injury or death. Building and equipment damage may also
result. Open all local and remote electric power supply disconnect switches and verify that power is off with a
voltmeter before working within any electric connection enclosures. The 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.
Installation, 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 improper wiring, piping, moving, lifting and handling. Can cause equipment damage,
serious injury, or death. Installation and service of this equipment should be done only by qualified personnel
who have been specially trained in the installation of air conditioning equipment and who are wearing
appropriate, OSHA approved PPE.
NOTICE
Risk of improper electrical connection of three phase input power. Can cause backward compressor rotation and
unit damage. Service technicians should use a gauge set on the system during the initial start-up to verify that
the three phase power is connected properly. Three phase power must be connected to the unit line voltage
terminals in the proper sequence so that the compressors rotate in the proper direction. Incoming power must
be properly phased to prevent compressors from running backward. We recommend checking the unit's phasing
with proper instrumentation to ensure that power connections were made correctly. We also recommend
verifying discharge and suction pressures during start-up to ensure that the compressors are running in the
correct direction.
• Confirm that all items in the Checklist for Completed Installation on page85 have been done.
• Locate the Vertiv™ CoolPhase CDU Warranty Inspection Check Sheet in the unit's electrical panel.
• Complete the CoolPhase CDU Warranty Inspection Check Sheet during start-up.
11 Initial Start-up Checks and
Commissioning Procedure for
Warranty Inspection
Proprietary and Confidential ©2024 Vertiv Group Corp. 91
Vertiv™ CoolPhase CDU Installer/User Guide
To Next Page
Loading...
