Vertiv Liebert CW 038, Инструкция по установке и эксплуатации

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10.2.1 Protective Features
Monitoring functions protect the motor against overtemperature of electronics, overtemperature of motor and incorrect
rotor positiondetection. Withany of these failures, analarm will display throughthe Liebert® iCOM controller and the motor
stops electronically. There is no automatic restart. The power must be switched off for a minimum of 20 seconds once the
motor is at a standstill.
The motor also provides locked rotor protection, undervoltage/phase failure detectionand motor current limitation. These
conditions will display analarm throughthe Liebert® iCOM.
10.2.2 Fan Impellers and Bearings Maintenance
Fanimpellers should be periodically inspected and any debris removed. Check to see if they are tightly-mounted onthe fan
shaft. Rotate the impellers and make sure they do not rub against the fanhousing.
Shaft bearings may be equipped withZerk fittings. Contact the manufacturer for the type of lubricant and greasing
intervals. The bearings should be inspected for signs of wear whenthe belts are adjusted. Shake the pulley and look for
movement inthe fanshaft. Replace the bearings if excessive movement is noticed. However, the cause of the wear must be
determined and corrected before returning the unit to operation.
10.2.3 Fan Assembly Troubleshooting
Any safety hazards stemming from the device must be re-evaluated once it is installed inthe end device.
Do not make any modifications, additions or conversions to the fanassembly without the approval of Vertiv.
WARNING! Risk of electric shock. Can cause serious 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 the fan-motor electric-connection enclosures. Fan-motor controls can maintain
an electric charge for 10 minutes after power is disconnected. Wait 10 minutes after power is
verified as off before working within the electric control/connection enclosures. Use only fully-
trained and qualified HVAC technicians to perform maintenance on the fans.
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.
Vertiv | Liebert® CW™Installer/User Guide
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