Vertiv Liebert XDU 060, Installer/User Manual

Page: 45 / 75

10 MAINTENANCE
10.1 Safety Instructions
All maintenance operations must strictly observe national, state, and local accident prevention regulations, especially the
regulations concerning electrical systems, refrigerators, and manufacturing resources.
Air conditioning equipment maintenance may be performed only by authorized properly trained and qualified personnel.
To keep all warranties valid, the maintenance must adhere to the manufacturer’s regulations.
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, 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 contact with high speed rotating fan blades. Can cause serious injury or death. Open all
local and remote electric power supply disconnect switches, verify with a voltmeter that power is off, and
verify that all fan blades have stopped rotating before working in the unit cabinet or on the fan assembly. If
control voltage is applied, the fan motor can restart without warning after a power failure. Do not operate the
unit with any or all cabinet panels removed.
CAUTION: Risk of contact with extremely hot and/or cold surfaces. Can cause injury. Verify that all
components have reached a temperature that is safe for human contact or wear appropriate, OSHA approved
PPE before working within the electric connection enclosures or unit cabinet. Perform maintenance only
when the system is de-energized and component temperatures have become safe for human contact.
WARNING! Risk of hair, clothing, and jewelry entanglement with high speed rotating fan blades. Can cause
equipment damage, serious injury, or death. Keep hair, jewelry, and loose clothing secured and away from
rotating fan blades during unit operation.
NOTICE
Risk of improper maintenance. Can cause equipment damage.
All maintenance must be performed only by authorized, properly trained, and qualified personnel.
Ignoring safety instructions is dangerous. Soiled parts cause a loss of performance and, for switch or control
devices, can lead to the breakdown of the unit performance and operation.
10 Maintenance
41