NOTICE
Risk of frozen fluids. Can cause equipment damage and building damage.
Freezing system fluids can rupture piping. Complete system drain-down cannot be ensured.
When the field piping or unit may be exposed to freezing temperatures, charge the system
with the proper percentage of glycol and water for the coldest design ambient.
Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system.
NOTICE
Risk of corrosion. Can cause equipment damage.
Read and follow individual unit installation instructions for precautions regarding fluid system
design, material selection and use of field-provided devices. Liebert systems contain iron and
copper alloys that require appropriate corrosion protection.
Contact a water consultant about water quality, corrosion and freeze protection requirements.
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. Preferably, surface waters
that are classified as soft and are low in chloride and sulfate ion content should be employed.
Proper inhibitor maintenance must be performed to prevent corrosion of system components.
Consult glycol manufacturer for testing and maintenance of inhibitors.
Commercial ethylene glycol (Union Carbide Ucartherm, Dow Chemical Dowtherm SR-1 and
Texaco E.G. Heat Transfer Fluid 100), when pure, is generally less corrosive to the common
metals of construction than water itself. It will, however, assume the corrosivity of the water from
which it is prepared and may become increasingly corrosive with use if not properly inhibited.
NOTICE
Risk of fluid leaks from tubing and piping corrosion. Can cause serious equipment and building
damage.
Idle fluid allows the collection of sediment that prevents the formation of a protective oxide
layer on the inside of tubes. Keep unit switched ON and system pump operating.
Vertiv | Liebert® XDC™ User Manual | 125
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