NOTICE
Risk of a leaking coil due to freezing and/or corrosion. Can cause equipment damage and serious building
damage.
Cooling and heat rejection coils, heat exchangers and piping systems that are connected to open cooling
towers or other open water/glycol systems are at high risk for freezing and premature corrosion. Fluids in
these systems must contain the proper antifreeze and inhibitors to prevent freezing and premature coil
corrosion. The water or water/glycol solution must be analyzed by a competent water treatment specialist
before startup to establish the inhibitor requirement. The water or water/glycol solution must be analyzed
every six months to determine the pattern of inhibitor depletion. The complexity of water-caused
problems and their correction makes it important to obtain the advice of a water treatment specialist and
follow a regularly scheduled maintenance program.
NOTICE
Risk of leaking chilled water lines. Can cause equipment and building damage.
Lines and joints must be inspected regularly. Improper installation, application and service practices can
result in water leakage from the unit. Water leakage can result in 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 coil and piping rupture. Can cause equipment damage and major fluid leaks resulting in serious
building damage, expensive repair costs and costly system down time.
Thermal expansion of the cooling fluid without means of expansion can cause the coil and piping to
rupture, spilling cooling fluid in the conditioned space. This can be caused, among other ways, by closing
the ball valves on both the supply and the return pipes. Always allow for thermal expansion either by
leaving at least one of the valves open or by opening the Liebert DCD’s bleed valve (see Figure 5.11 on
page41).
Vertiv | Liebert® DCD™ User Manual| 2
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