Vertiv Liebert XD Series, System Design Manual

Page: 142 / 200

WARNING! Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electrical power supplies before working within the electrical
enclosure.
The line side of the disconnect remains energized when the disconnect is Off.
Use a voltmeter to verify that the electrical power is Off before performing any electrical and/or
mechanical service and/or maintenance operations.
WARNING! Risk of high speed moving parts. Can cause injury or death.
The fan(s) blades can start to rotate unexpectedly when the power is On. Disconnect all local
and remote electrical power supplies before working within the fan compartment.
Use a voltmeter to verify that the electrical power is Off before performing any electrical and/or
mechanical service and/or maintenance operations.
Each unit is shipped from the factory with all internal unit wiring completed. Refer to the electrical
schematic supplied with the drycooler 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.
For electrical characteristics, refer to Table 6.15 on the facing page.
6.12.1 Line Voltage Wiring
WARNING! Risk of electrical fire and short circuit. Can cause property damage, injury or death.
Select and install the electrical supply wire and overcurrent protection device(s) according to
the specifications on the unit nameplate(s), per the instructions in this manual and according
to the applicable national, state and local code requirements. Use copper conductors only.
Make sure all electrical connections are tight. Unit-specific wiring diagrams are provided on
each unit.
Drycooler rated voltage should be verified with available power supply upon receipt of unit but before
installation. Refer to the unit electrical schematic and serial tag for specific electrical requirements. All
wiring must be done in accordance with all applicable local, state and national electrical codes.
Line voltage electrical service is required for all drycoolers at the location of the drycooler. If the drycooler
contains pump controls, the pump package voltage must match the drycooler voltage. See the unit's
serial tag for specific electrical requirements of the drycooler and any pump package. A unit disconnect is
standard on drycoolers with internal pump controls and optional on all other drycoolers. Site disconnect
(s) may also be required per local code to isolate the drycooler/pumps for maintenance. Route the supply
power to the site disconnect switch and then to the drycooler. Route the conduit through the hole
provided in the cabinet. Connect earth ground to lug provided near terminal board.
Vertiv | Liebert® Xtreme Density™ System Design Manual | 142