Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW Manuel D’Utilisation

This manual contains important safety instructions that should be followed during the installation 

and maintenance of the Liebert MC. Read this manual thoroughly before attempting to install or 

operate this unit.
Only qualified personnel should move, install or service this equipment.
Adhere to all warnings, cautions and installation, operating and safety instructions on the unit and in 

this manual. Follow all operating and user instructions.

Risk of improper handling, installation, and service. Can cause property damage, injury, or 

death.
Only trained and qualified personnel should work on this unit. Read all installation, 

operation and safety alerts and instructions and wear appropriate protective headgear, safety 

glasses, gloves and clothing before installing, operating or servicing this unit.

Risk of arc flash and electric shock hazard. Disconnect all local and remote electric power 

supplies and wear appropriate personal protective equipment per NFPA 70E before working 

within the electric control enclosure or the fan motor connection box(es). Failure to comply can 

cause serious injury or death.
This unit contains lethal voltage. The line side of the unit disconnect switch remains 

energized when the unit disconnect switch is in the “Off” position. Use a voltmeter to verify 

that the line side input electric power to the unit disconnect switch is off before working on 

any electrical components or connections.

Risk of high-speed, rotating fan blades. Can cause serious personal injury or death.
Fan blades can automatically start rotating without warning at any time during a cooling 

cycle or after power is restored after a power failure. Disconnect all local and remote electric 

power supplies and verify with a voltmeter that the power is off and that the fan blades have 

stopped rotating before working within the cabinet or servicing fan motors.

Risk of electric shock. Can cause injury or death.
The variable speed control may contain a stored electrical charge. Disconnect all local and 

remote electrical power supplies and wait 10 minutes before working within condenser main 

electrical enclosure or fan electrical enclosure.

Risk of heavy condenser falling or tipping over. Can cause property damage, serious injury or 

death.
Confirm that all components of the lifting system are rated for the weight of the condenser by 

an OSHA Certified rating organization before attempting to lift and/or move the condenser. 

See 2.2 - Dimensions and Weights for the condenser weights.

Risk of hot surfaces. Can cause injury.
Fan motors, transformers, piping and other components may become extremely hot during 

normal operation. Wear thermally insulated gloves and appropriate protective clothing and 

allow time for components to cool when working within the cabinet or electric control 

enclosure.