Liebert PX018 Installer's/User's Manual page 10

CAUTION: Risk of contact with extremely hot water and part surfaces. Can cause burn injury.
The infrared humidifier bulbs, metal enclosure, humidifier water, water reservoir pan and drain
tubing are very hot during and shortly after operation. Allow sufficient time for these parts to
cool to a touch-safe temperature before handling. Use extreme caution, and wear appropriate,
OSHA-approved PPE when performing maintenance on the infrared humidifier.
NOTICE
Risk of oil contamination with water. Can cause equipment damage.
Liebert PDX 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
installation or 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 refrigerant charging. Can cause equipment damage.
Refrigerant charge must be weighed into air-cooled compressorized systems before they are
started. Starting scroll and digital scroll compressors without proper refrigerant charging can
cause the compressors to operate at less than 5°F (–15°C) evaporator temperature and at less
than 20 psig (138 kPa). Operation for extended periods at less than 20 psig (138 kPa) can
cause premature compressor failure.
NOTICE
Risk of clogged or leaking drain lines and leaking water-supply lines. Can cause equipment and
building damage.
This unit requires a water drain connection. Drain lines must be inspected at start-up and
periodically, and maintenance must be performed to ensure that drain water runs freely
through the drain system and that lines are clear and free of obstructions and in good
condition with no visible sign of damage or leaks. This unit may also require an external water
supply to operate.
Improper installation, application and service practices can result in water leakage from the
unit. Water leakage can result in catastrophic and expensive building and equipment damage
and loss of critical data center equipment.
Do not locate unit directly above any equipment that could sustain water damage.
We recommend installing a monitored fluid-detection system to immediately discover and
report coolant-fluid system and condensate drain-line leaks.
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide | 10