NOTICE
Risk of improper refrigerant charging. Can cause equipment damage.
R-410A is a blended refrigerant and must be introduced and charged from the cylinder only as a liquid.
Care must be exercised to avoid damage to the compressor. We recommend connecting a manifold charging
hose equipped with a ball valve to the liquid line Schrader port.
NOTICE
Risk of improper operation. Can cause compressor failure.
Operating the unit with the EEV closed can cause compressor failure. A minimum of 20 psig (138 kPa) must be
established and maintained for the compressor to operate. The charging function can be reset as many times as
required to complete.
NOTICE
The unit must have line voltage applied to the unit at least 12 hours before compressor start-up to allow the
compressor crankcase heaters time to warm the compressors and boil off any liquid refrigerant in the
compressors after pre-charge.
NOTICE
Risk of frozen pipes and corrosion from improper coolant mixture. Can cause water leaks resulting in equipment
and building damage.
When the cooling unit or piping may be exposed to freezing temperatures, charge the system with the proper
percentage of glycol and water for the coldest design ambient temperature. Automotive antifreeze is
unacceptable and must NOT be used in any glycol fluid system. Use only HVAC glycol solution that meets the
requirements of recommended industry practices. Do not use galvanized pipe.
NOTICE
Risk of piping system corrosion and freezing fluids. Can cause leaks resulting in equipment and very expensive
building damage. Piping systems are at risk of freezing and premature corrosion. Fluids in these systems must
contain the proper antifreeze and inhibitors to prevent freezing and premature corrosion. The water or
water/glycol solution must be analyzed by a competent local water treatment specialist before start-up to
establish the inhibitor and antifreeze solution requirement and at regularly scheduled intervals throughout the
life of the system to determine the pattern of inhibitor depletion.
The complexity of water and water/glycol solution condition problems and the variations of required treatment
programs make it extremely important to obtain the advice of a competent and experienced water treatment
specialist and follow a regularly scheduled coolant fluid system maintenance program.
Water chemistry varies greatly by location, 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 water used must be
considered, because water from 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 water/coolant fluid must be treated and circulating through the
system continuously to prevent the buildup of sediment deposits and/or growth of sulfate reducing bacteria.
Proper inhibitor maintenance must be performed in order to prevent corrosion of the system. Consult glycol
manufacturer for testing and maintenance of inhibitors.
1 Important Safety Instructions Proprietary and Confidential ©2024 Vertiv Group Corp. 5
Vertiv™ CoolPhase CDU Installer/User Guide
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