The flow sensor is for indication only, it is not used for any control or alarm functions nor should it be depended on for
consequential actions. Differential pressure is the principle means of PQ control for both a single unit and in group operation.
Instrumentation and reporting in this aspect is accurate and reliable.
1.4 Electrical Connection
WARNING! This unit is powered by high voltage. Serious injury or death can occur. Power supplied to this
product must be provided with an external means of isolation.
WARNING! Arc flash and electric shock hazard. Can cause serious injury or death. Building and equipment
damage may also result. Disconnect all local and remote electric power supplies and wear appropriate, OSHA-
approved personal protective equipment (PPE) per NFPA 70E before working within the electric control
enclosure. Customer must provide earth ground to unit, per NEC, CEC and local codes, as applicable.
Verify with a voltmeter that power is Off. The controller does not isolate power from the unit, even in the
“Unit Off” mode. Some internal components still require and receive power even during the Unit Off mode of
the controller. The factory-supplied, optional disconnect switch is inside the unit. The line side of this switch
contains live high voltage. 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.
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. Follow all local codes.
WARNING! Risk of electric shock. Can cause serious injury or death. Building and equipment damage may also
result. Open all local and remote electric power supply disconnect switches and verify that power is off with a
voltmeter before working within any electric connection enclosures. The 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 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 model of the controller.
Installation, 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.
Electrical connections should be carried out in accordance with local and national regulations by a qualified electrician. Never
make any electrical connections inside, or to the unit unless the electricity supply has been switched OFF at the disconnect
(isolator).
1.5 Replacement Parts
Any parts replaced during maintenance or servicing must be the same specification as those being replaced and should only
be obtained from Vertiv.
6 Proprietary and Confidential ©2025 Vertiv Group Corp. 1 Important Safety Information
Vertiv™ CoolChip CDU 600 Operation and Maintenance Guide
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