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.
See transformer label for primary tap connections. Installer will need to change transformer primary taps if
applied unit voltage is other than pre-wired tap voltage.
NOTICE
Risk of improper electrical connection of three-phase input power. Can cause backward pump rotation and unit
damage. Service technicians should use a gauge set on the system during the initial start up to verify that the
three-phase power is connected properly. Three-phase power must be connected to the unit line voltage
terminals in the proper sequence so that the pump rotates in the proper direction. Incoming power must be
properly phased to prevent pump from running backward. We recommend checking the unit's phasing with
proper instrumentation to ensure that the power connections were made correctly. We also recommend
verifying discharge and suction pressures during start up to ensure that the pumps are running in the correct
direction.
NOTICE
Risk of improper electrical connection of three phase input power. Can cause backward compressor rotation and
unit damage. Service technicians should use a gauge set on the system during the initial start-up to verify that
the three phase power is connected properly. Three phase power must be connected to the unit line voltage
terminals in the proper sequence so that the compressors rotate in the proper direction. Incoming power must
be properly phased to prevent compressors from running backward. We recommend checking the unit's phasing
with proper instrumentation to ensure that power connections were made correctly. We also recommend
verifying discharge and suction pressures during start-up to ensure that the compressors are running in the
correct direction.
NOTICE
Risk of improper maintenance. Can cause equipment damage.
All maintenance must be performed only by authorized, properly trained, and qualified personnel.
Ignoring safety instructions is dangerous. Soiled parts cause a loss of performance and, for switch or control
devices, can lead to the breakdown of the unit performance and operation.
NOTICE
Risk of improper compressor lubrication. Can cause compressor and refrigerant system damage.
Failure to use oil types, viscosities and quantities recommended by the compressor manufacturer may reduce
compressor life and void the compressor warranty.
NOTICE
Risk of improper component re-installation. Can cause equipment damage.
Identify and mark location of suction pressure transducer and discharge pressure switch. These devices look
similar and they must be reinstalled in their original location.
1 Important Safety Instructions Proprietary and Confidential ©2024 Vertiv Group Corp. 7
Vertiv™ CoolPhase CDU Installer/User Guide
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