Vertiv Liebert DSE Packaged Series Installer/User Manual page 6

WARNING! Risk of pressurized doors flying open or slamming closed suddenly. Can cause serious injury. Do
not attempt to open doors while fans are running. Do not turn on fans with doors open. Before opening the
door, open all local and remote electric power supply disconnect switches, verify with a voltmeter that power
is off, and verify that all fans have stopped rotating. Do not leave unsecured objects in the fan's bay after any
maintenance operation.
WARNING! Risk of contact with flying objects. Can cause serious injury or death. Do not leave unsecured
objects or tools in the fan's bay after performing maintenance operations. Re-install all panels before starting
up this unit after maintenance is performed.
WARNING! Risk of very heavy, 250-lb (113.4-kg) fan modules dropping downward suddenly. Can cause injury
or death. Support fan modules before removing mounting hardware. Use caution to keep body parts out of
the fan modules pathway during repositioning. Only properly trained and qualified personnel should work on
this equipment.
WARNING! Risk of improper moving. Can cause equipment damage, injury or death. Use only lifting
equipment that is rated for the unit weight by an OSHA-certified rating organization. The center of gravity
varies depending on the unit size and selected options. The slings must be equally spaced on either side of
the center of gravity indicator.Use the center of gravity indicators on the unit to determine the position of the
slings. Unit weights are listed in Table 3.3 on page 16, and Table 3.4 on page 16
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.
WARNING! Risk of improper wire sizing/rating and loose electrical connections. Can cause overheated wire
and electrical connection terminals resulting in smoke, fire, equipment and building damage, injury or death.
Use correctly sized copper wire only and verify that all electrical connections are tight before turning power
On. Check all electrical connections periodically and tighten as necessary.
WARNING! Risk of wiring damage, short circuits and electric shock. Can cause overheated wiring, smoke, fire,
activation of fire suppression systems and EMS personnel and equipment, building and equipment damage,
injury or death. Insert CSA certified or UL listed bushings into holes and or knockouts used to route wiring
through metal panels to protect the wire insulation from contact with sheet metal edges.
Vertiv | DSE Packaged Solution Installer/User Guide
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