8 INITIAL STARTUP 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 startup 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 startup to ensure that the compressors are
running in the correct direction.
•
Confirm that all items on
Checklist for Completed Installation
on page 37 have been done.
•
Locate the Liebert® DSE Warranty Inspection Check Sheet in the unit’s electric panel.
•
Complete the Liebert® DSE Warranty Inspection Check Sheet during startup.
•
Forward the completed Liebert® DSE 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
startup and commissioning. Visit https://www.Vertiv.com/en-us/support/ or call 1-800-543-2778 for contacts.
8 Initial Startup Checks and Commissioning Procedure for Warranty Inspection
41
Содержание Liebert DA250
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