Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW User Manual
Electrical Connections
Liebert
®
MC
™
18
4.0
E
LECTRICAL
C
ONNECTIONS
Line voltage electrical service is required for all models. Refer to equipment nameplate regarding
wire size and circuit protection requirements. Electrical service must conform to national and local
electrical codes. Refer to Figure 16 for electrical service entrances into unit. Refer to electrical
schematic when making connections.
A manual electrical disconnect switch should be installed in accordance with local codes. Consult local
A manual electrical disconnect switch should be installed in accordance with local codes. Consult local
codes for external disconnect requirements.
All internal wiring is completed at the factory.
All internal wiring is completed at the factory.
!
WARNING
Risk of electrical shock. Can cause injury or death.
The variable speed control may contain a stored electrical charge. Disconnect all local and
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 the condenser’s
main electrical enclosure or fan electrical enclosure.
The Liebert MC contains lethal voltage in some circuits. The line side of the disconnect
The Liebert MC contains lethal voltage in some circuits. The line side of the disconnect
remains energized when the condenser unit disconnect is switched to the Off position.
Use a voltmeter to verify that the line-side electrical power is Off before making any electrical
Use a voltmeter to verify that the line-side electrical power is Off before making any electrical
connections or performing any electrical and/or mechanical service and/or maintenance
operations.
!
WARNING
Risk of high-speed, rotating fan blades. Can cause serious injury or death.
Fan blades can automatically start rotating without warning at any time during a cooling
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.
Each unit is shipped from the factory with all internal wiring completed. Refer to the
Each unit is shipped from the factory with all internal wiring completed. Refer to the
electrical schematic supplied with the condenser when making line voltage supply,
low-voltage indoor unit interlock and any low-voltage alarm connections. All wiring must be
done in accordance with all applicable local, state and national electrical codes.
NOTE
Installation and service of this equipment should be done only by properly trained and
Installation and service of this equipment should be done only by properly trained and
qualified personnel who have been specially trained in the installation of air conditioning
equipment.
NOTE
Use copper wiring only. Make sure that all connections are tightened to the proper torque
Use copper wiring only. Make sure that all connections are tightened to the proper torque
mentioned on the component.