Vertiv Liebert DSE Packaged Series Installer/User Manual page 8

NOTICE
Risk of improper power-supply connection. Can cause equipment damage and loss of warranty coverage.
Prior to connecting any equipment to a main or alternate power source (for example: back-up generator
systems) for start-up, commissioning, testing, or normal operation, ensure that these sources are correctly
adjusted to the nameplate voltage and frequency of all equipment to be connected. In general, power-source
voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Also, ensure
that no three-phase sources are single-phased at any time.
NOTICE
Risk of oil contamination with water. Can cause equipment damage.
Liebert® DSE Packaged Solution systems require the use of POE (polyolester) oil. POE oil absorbs water at a
much faster rate when exposed to air than previously used oils. Because water is the enemy of a reliable
refrigeration system, extreme care must be used when opening systems during service. If water is absorbed
into the POE oil, it will not be easily removed and will not be removed through the normal evacuation process. If
the oil is too wet, it may require an oil change. POE oils also have a property that makes them act as a solvent
in a refrigeration system. Maintaining system cleanliness is extremely important because the oil will tend to
bring any foreign matter back to the compressor.
NOTICE
Risk of improper operation in high-humidity conditions. Can cause unit damage and water carryover.
The Liebert® DSE Packaged Solution operations only as a sensible cooling unit and does not provide
dehumidification.
NOTE: The Liebert® cooling unit has a factory installed high pressure safety switch in the high side refrigerant
circuit.
Agency Listed
Standard 60-Hz units are CSA Certified to the harmonized U.S. and Canadian product safety standard CSA C22.2 No
236/UL 1995 for "Heating and Cooling Equipment" and are marked with the CSA c-us logo.
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Vertiv | DSE Packaged Solution Installer/User Guide