NOTE: Clean the EC fan with water only when temperatures are greater than 50°F (10°C).
- Make sure that no water gets into the inside of the motor.
- Do not hold the jet spray directly on the motor openings and seals.
- During cleaning work using a jet spray, no guarantee is assumed regarding corrosion formation/paint
adhesion for unpainted/painted fans.
11.3 Fan Replacement
Source: INST-9168, Rev. 3
WARNING! Arc flash and electric shock hazard. Open all local and remote unit electric power
disconnect switches, verify with a voltmeter that power is Off and wear protective equipment
per NFPA 70E before working within the electric enclosure. Failure to comply can cause injury
or death.
Unit contains potentially lethal voltage in some circuits.
Only properly trained and qualified personnel may perform repair, maintenance and cleaning on
these units.
WARNING! Risk of electric shock. Can cause serious injury or death.
The fan motor control can contain a residual electric charge after power is disconnected. Do
not open the motor electrical-connection enclosure within the first 10 minutes after
disconnection of all phases.
WARNING! Risk of contact with high-speed, rotating fan blades. Can cause injury or death.
The fan blades can start rotating without warning any time during a cooling cycle or after
power is restored after a power failure. Disconnect all local and remote electrical power supplies
to the unit, wait 10 minutes and verify with a voltmeter that the power is Off and that all fan
blades have stopped rotating before working on or near the fans.
Vertiv | Liebert® MC™ Installer/User Guide | 111
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