6 Maintenance
6.1 Fluid Specifications
CAUTION: Risk of improper piping installation, leak checking, fluid chemistry and fluid maintenance. Can
cause injury. Building and equipment damage may also result. Installation and service of this equipment
should be done only by qualified personnel who have been specially-trained in the installation of air-
conditioning equipment and who are wearing appropriate, OSHA-approved PPE.
NOTICE
Risk of leaking water/coolant fluid lines. Can cause equipment and building damage. Lines and joints must be
inspected regularly. Improper installation, application, and service practices can result in water/coolant leakage
from the unit. Water/coolant fluid can result in fluid leakage, severe property damage and loss of critical data
center equipment. Do not locate unit directly above any equipment that could sustain water damage. Vertiv
recommends installing monitored leak detection equipment for the unit and supply and return lines.
NOTICE
Risk of no flow condition. Can cause equipment damage. Do not leave the water/coolant fluid supply circuit in a
no flow condition. Idle fluid allows the collection of sediment that prevents the formation of a protective oxide
layer on the inside of the tubes. Keep unit switched On and water/ coolant fluid supply circuit system operating
continuously. In multiple unit teams, allow standby units to enter the rotation automatically or schedule regular
manual rotations.
NOTICE
Risk of piping system corrosion and freezing fluids. Can cause leaks resulting in equipment and very expensive
building damage. Heat exchangers and piping systems are at high risk of freezing and premature corrosion.
Automotive antifreeze is unacceptable and must NOT be used in any fluid system. Use only coolant fluid solution
that meets the requirements of recommended industry practices. Do not use galvanized pipe.
The system coolant fluid must be analyzed by a competent fluid treatment specialist before start up to establish
the inhibitor and antifreeze solution requirement and evaluated at regularly scheduled intervals throughout the
life of the system to determine the pattern of inhibitor depletion.
The fluid complexity and variants of required treatment programs make it extremely important to obtain the
advice of a competent and experienced fluid treatment specialist and follow a regularly scheduled coolant-fluid
system-maintenance program.
Fluid chemistry varies greatly as do the required additives, called inhibitors, that reduce the corrosive effect of
the fluids on the piping systems and components.
The chemistry of the coolant fluid used must be considered, because some sources may contain corrosive
elements that reduce the effectiveness of the inhibited formulation. Sediment deposits prevent the formation of
a protective oxide layer on the inside of the coolant system components and piping. The coolant fluid must be
treated and circulating through the system continuously to prevent the buildup of deposits and/or growth of
sulfate reducing bacteria. Proper inhibitor maintenance must be performed to prevent corrosion of the system.
Consult fluid manufacturer for testing and maintenance of inhibitors.
6 Maintenance Proprietary and Confidential ©2025 Vertiv Group Corp. 67
Vertiv™ CoolChip CDU 600 Operation and Maintenance Guide
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