Vertiv Liebert DSE500 - Initial Start-Up Checks and Commissioning Procedure

7 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 Liebert® 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 controller. The factory-supplied
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 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.
The EC fans are not a reliable indicator of proper connection. The blowers will rotate the same
direction, regardless of the three-phase power input. 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 on Checklist for Completed Installation on page23 have been done.
• Locate “Liebert® DSE500 Warranty Inspection Check Sheet” in the unit’s electric panel.
• Complete “Liebert® DSE500 Warranty Inspection Check Sheet” during start-up.
• Forward the completed “Liebert® DSE500 Warranty Inspection Check Sheet” to your local sales
office. This information must be completed and forwarded to validate warranty.
• Contact your local sales representative or technical support if you have any questions or
problems during unit start-up and commissioning. Visit https://www.vertivco.com/en-
us/support/ or call 1-800-543-2778 for contacts.
7 Initial Start-up Checks andCommissioningProcedure forWarrantyInspection 25