Vertiv Liebert Drycooler - Line Voltage Wiring

NOTE: Installation and service of this equipment should be done only by properly-trained and qualified personnel who
are specially-trained in the installation of air-conditioning equipment.
The electrical connections are described in the submittal documents included in the Submittal Drawings Contents on
page65.
The following table lists the relevant documents by number and title.
Document Number Title
DPN000277 Electrical field connections, 1 fan DSF/DDF drycooler with pump control
DPN000276 Electrical field connections, 1, 2, 3 and 4 fan DSO/DDO drycooler with pump control
DPN000703 Electrical field connections, 6 and 8 fan DSO/DDO drycooler with pump control
DPN000702 Electrical field connections, 6 and 8 fan DDNC drycooler without pump control
DPN000704 Electrical field connections, 6 and 8 fan DDNL/DDNT drycooler without pump control
DPN000282 Electrical field connections, Fluid-temperature control drycooler, Quiet-Line
DPN000722 Electrical field connections, 6- and 8-fan Quiet-Line drycooler with no control
DPN000723 Electrical field connections, 6- and 8-fan Quiet-Line drycooler with DSO/DDO pump control
DPN000724 Electrical field connections, 6- and 8-fan Quiet-Line drycooler with DDNL and DDNT pump control
Table 6.1 Electrical Field Connection Drawings
6.1 Line Voltage Wiring
WARNING! Risk of electrical fire and short circuit. Can cause property damage, injury or death. Select and
install the line side 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. Verify that all electrical connections are tight.
Unit-specific wiring diagrams are provided on each unit.
NOTICE
Risk of improper power-supply connection. Can cause equipment damage and loss of warranty coverage.Prior to
connecting any equipment to a main or alternate power source (for example: back-up generator systems) for start-up,
commissioning, testing, or normal operation, ensure that these sources are correctly adjusted to the nameplate
voltage and frequency of all equipment to be connected. In general, power-source voltages should be stabilized and
regulated to within ±10% of the load nameplate nominal voltage. Also, ensure that no three-phase sources are single-
phased at any time.
Drycooler-rated voltage should be verified with available power supply before installation. Refer to the unit’s electrical
schematic and serial tag for specific electrical requirements.
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 all 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 the terminal board. Refer to the appropriate drawing in the Submittal Drawings Contents on
page65.
Vertiv | Liebert® Drycooler Installer/User Guide
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