6 Electrical Connections
WARNING! Arc flash and electric shock hazard. Open all local and remote electric power-supply disconnect
switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective
equipment (PPE) per NFPA 70E before working within the electric control enclosure. Failure to comply can
cause serious injury or death. Customer must provide earth ground to unit, per NEC, CEC and local codes, as
applicable. Before proceeding with installation, read all instructions, verify that all the parts are included and
check the nameplate to be sure the voltage matches available utility power. The Liebert® controller does not
isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive
power even during the “Unit Off” mode of the controller. The only way to ensure that there is NO voltage
inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic. Follow all
local codes.
WARNING! Risk of electric shock. Can cause equipment damage, 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
any electric connection enclosures. Service and maintenance work must be performed only by properly
trained and qualified personnel and in accordance with applicable regulations and manufacturers’
specifications. Opening or removing the covers to any equipment may expose personnel to lethal voltages
within the unit even when it is apparently not operating and the input wiring is disconnected from the
electrical source.
WARNING! If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
qualified personnel to avoid a hazard.
Before proceeding with the electrical connections, ensure that:
•
The unit has been fixed to the floor or the adjacent cabinets.
•
All electrical components are in good condition.
•
All terminal screws are tight.
•
The supply voltage and frequency are as indicated on the unit.
6.1 Connecting Power Supply Cable
The power supply requirement is 400V/3Ph/50Hz for Vertiv™ Liebert® CRV CRC30 and 230V/1P/50Hz for Vertiv™
Liebert® CRV CRC60. The size of power cable must support the full load current. Do not fit the supply cable in the raceways
inside the electrical box. Use multipolar cables with sheath (CEI20-22) only. The electrical schematic sheet is included in
the accessories bag.
Model
Without Heater or Humidifier
With Heater
With Humidifier
CRC30
8
14
10.3
CRC60
13
-
-
Table 6.1 Rated Full Load Current (Unit: Ampere)
NOTE: The heater and humidifier will not work at the same time.
6 Electrical Connections
39
Vertiv™ Liebert® CRV CRC30 and CRC60 Chilled Water Cooling System User Manual
