Maintenance - Liebert PX018 Installer's/User's Manual

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,
OHSA-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 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, wearing appropriate, OSHA-approved PPE, who have been specially-
trained in the installation of air-conditioning equipment.
The LiebertPDX/PCW are single components in the facility heat-removal system. The system includes air
distribution (raised floors, duct systems), outdoor heat rejection (condensers, pumps, drycoolers) and
indoor cooling and humidity loads (equipment load, location, outside air infiltration). Proper application
and maintenance of the entire system is critical to the life and reliability of the thermal-management
units.
• 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.
• See the Liebert® iCOM™ user manual, SL-18841, for instructions on using the controller to
predict some service maintenance intervals.
• We recommend the use of trained and authorized service personnel, extended service
contracts and factory-specified replacement parts. Contact your Vertiv™ sales representative.
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide | 61