9 MAINTENANCE
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 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 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.
• Good maintenance practices are essential to minimizing operation costs and maximizing
product life.
• Read and follow monthly and semi-annual maintenance schedules included in this manual.
These MINIMUM maintenance intervals may need to be more frequent based on site-specific
conditions.
• We recommend the use of trained and authorized service personnel, extended service
contracts and factory-specified replacement parts. Contact your Vertiv sales representative.
9.1 Filters
NOTICE
Risk of improper filter installation. Can cause filter collapse and airflow reduction.
To maximize the performance and reliability of the equipment, use only Vertiv filters. Contact your Vertiv
representative to order replacement filters.
Verify that filters are installed and positioned so the air-flow direction marked on the filter is the same
direction as unit air flow.
9 Maintenance 35
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