Vertiv Liebert CW, Инструкция по установке и эксплуатации, Страница: 41 / 76

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 exposure to harmful noise levels. Can cause hearing injury or loss.
Depending on the installation and operating conditions, a sound pressure level greater than
70 dB(A) may arise. Take appropriate technical safety measures. Operating personnel must
wear appropriate, OSHA-approved PPE and observe all appropriate hearing-protection safety
requirements.
CAUTION: Risk of contact with hot surfaces. Can cause injury. The fan motor, and some
electrical components are extremely hot during unit operation. Allow sufficient time for them to
cool to a touch-safe temperature before working within the unit cabinet. Use extreme caution
and wear appropriate, OSHA-approved PPE when working on or near hot components.
NOTICE
Risk of improper power-supply connection. Can cause equipment damage and loss of warranty
coverage.
Prior to connecting any equipment to a main or alternate power source (for example: back-up
generator systems) for start-up, commissioning, testing, or normal operation, ensure that these
sources are correctly adjusted to the nameplate voltage and frequency of all equipment to be
connected. In general, power-source voltages should be stabilized and regulated to within
±10% of the load nameplate nominal voltage. Also, ensure that no three-phase sources are
single-phased at any time.
NOTE: Do not assume that the fan blades will not start to spin. If the motor is in a fault condition, it will
safely shut down. Once the fault condition is cleared, there are certain conditions in which the motor
will automatically resume operation.
8.2.2 Fan Impellers
Fan impellers should be periodically inspected and any debris removed. Check to ensure that the
impellers can rotate freely.
Consult the factory for fan-assembly maintenance and removal instructions. Do not attempt to service or
remove the fans without first contacting Vertiv support at 1-800-222-5877.
8.2.3 Blower-motor Lubrication
The motor is initially lubricated at the factory.
• Contact the motor manufacturer for the lubrication interval for motor bearings.
• Contact the motor manufacturer to determine the type of grease to use for lubrication.
8 Maintenance
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